//
//    ██████ ██   ██  ██████   ██████
//   ██      ██   ██ ██    ██ ██            ** Classy Header-Only Classes **
//   ██      ███████ ██    ██ ██
//   ██      ██   ██ ██    ██ ██           https://github.com/Tracktion/choc
//    ██████ ██   ██  ██████   ██████
//
//   CHOC is (C)2022 Tracktion Corporation, and is offered under the terms of the ISC license:
//
//   Permission to use, copy, modify, and/or distribute this software for any purpose with or
//   without fee is hereby granted, provided that the above copyright notice and this permission
//   notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
//   WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
//   AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
//   CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
//   WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
//   CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

#ifndef CHOC_JAVASCRIPT_QUICKJS_HEADER_INCLUDED
#define CHOC_JAVASCRIPT_QUICKJS_HEADER_INCLUDED

#include "choc_javascript.h"

/**
    This file contains the implementation of choc::javascript::createQuickJSContext(),
    and thus has the whole of QuickJS inside it.

    If you use this in a project, you need to make sure that this header is included by
    one (and only one!) of your source files.
*/


//==============================================================================
//        _        _           _  _
//     __| |  ___ | |_   __ _ (_)| | ___
//    / _` | / _ \| __| / _` || || |/ __|
//   | (_| ||  __/| |_ | (_| || || |\__ \ _  _  _
//    \__,_| \___| \__| \__,_||_||_||___/(_)(_)(_)
//
//   Code beyond this point is implementation detail...
//
//==============================================================================

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdarg.h>
#include <inttypes.h>
#include <string.h>
#include <assert.h>
#include <time.h>
#include <fenv.h>
#include <math.h>
#if defined(__APPLE__)
#include <malloc/malloc.h>
#elif defined(__linux__)
#include <malloc.h>
#elif defined(__FreeBSD__)
#include <malloc_np.h>
#endif

#if _MSC_VER
 #undef  WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #undef  NOMINMAX
 #define NOMINMAX
 #define Rectangle Rectangle_renamed_to_avoid_name_collisions
 #include <windows.h>
 #undef Rectangle
#elif ! defined(EMSCRIPTEN)
 #include <sys/time.h>
#endif

namespace choc::javascript
{

namespace quickjs
{

#ifdef CHOC_REGISTER_OPEN_SOURCE_LICENCE
 CHOC_REGISTER_OPEN_SOURCE_LICENCE (QuickJS, R"(
==============================================================================
QuickJS Javascript Engine License:

Copyright (c) 2017-2021 Fabrice Bellard
Copyright (c) 2017-2021 Charlie Gordon

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
)")
#endif

#include "../platform/choc_DisableAllWarnings.h"

/*
    The massive chunk of code inside this quickjs namespace is the content
    of most of the files from QuickJS, copy-pasted into a huge sprawling
    mess so we can all live the single-header-file dream.

    The QuickJS homepage is here: https://bellard.org/quickjs/
    And the github is here: https://github.com/bellard/quickjs

    The original BSD-like license is available here:
    https://github.com/bellard/quickjs/blob/master/LICENSE

    I've made a few hacks to it to make it work in a C++ single header file.
    This involved tweaking some C code to work as C++, converting some
    repeatedly-included declaration header files to use the X-macro style,
    and adding workarounds for the lack of MSVC support.
*/

#define CONFIG_VERSION "2021-03-27"

#if defined(__GNUC__) || defined(__clang__)
#define js_likely(x)          __builtin_expect(!!(x), 1)
#define js_unlikely(x)        __builtin_expect(!!(x), 0)
#define js_force_inline       inline __attribute__((always_inline))
#else
#define js_likely(x)     (x)
#define js_unlikely(x)   (x)
#define js_force_inline  inline
#endif

#define no_inline

#ifndef offsetof
#define offsetof(type, field) ((size_t) &((type *)0)->field)
#endif
#ifndef countof
#define countof(x) (sizeof(x) / sizeof((x)[0]))
#endif

typedef int BOOL;

#ifndef FALSE
enum {
    FALSE = 0,
    TRUE = 1,
};
#endif

void pstrcpy(char *buf, int buf_size, const char *str);
char *pstrcat(char *buf, int buf_size, const char *s);
int strstart(const char *str, const char *val, const char **ptr);
int has_suffix(const char *str, const char *suffix);

static inline int max_int(int a, int b)
{
    if (a > b)
        return a;
    else
        return b;
}

static inline int min_int(int a, int b)
{
    if (a < b)
        return a;
    else
        return b;
}

static inline uint32_t max_uint32(uint32_t a, uint32_t b)
{
    if (a > b)
        return a;
    else
        return b;
}

static inline uint32_t min_uint32(uint32_t a, uint32_t b)
{
    if (a < b)
        return a;
    else
        return b;
}

static inline int64_t max_int64(int64_t a, int64_t b)
{
    if (a > b)
        return a;
    else
        return b;
}

static inline int64_t min_int64(int64_t a, int64_t b)
{
    if (a < b)
        return a;
    else
        return b;
}

/* WARNING: undefined if a = 0 */
static inline int clz32(unsigned int a)
{
   #if _MSC_VER
    unsigned long i;
    _BitScanReverse (&i, a);
    return 31 ^ i;
   #else
    return __builtin_clz(a);
   #endif
}

/* WARNING: undefined if a = 0 */
static inline int ctz32(unsigned int a)
{
   #if _MSC_VER
    unsigned long i;
    _BitScanForward (&i, a);
    return 31 ^ i;
   #else
    return __builtin_ctz(a);
   #endif
}

static inline uint64_t get_u64(const uint8_t *tab)
{
    uint64_t v;
    memcpy (&v, tab, sizeof (v));
    return v;
}

static inline int64_t get_i64(const uint8_t *tab)
{
    int64_t v;
    memcpy (&v, tab, sizeof (v));
    return v;
}

static inline void put_u64(uint8_t *tab, uint64_t val)
{
    memcpy (tab, &val, sizeof (val));
}

static inline uint32_t get_u32(const uint8_t *tab)
{
    uint32_t v;
    memcpy (&v, tab, sizeof (v));
    return v;
}

static inline int32_t get_i32(const uint8_t *tab)
{
    int32_t v;
    memcpy (&v, tab, sizeof (v));
    return v;
}

static inline void put_u32(uint8_t *tab, uint32_t val)
{
    memcpy (tab, &val, sizeof (val));
}

static inline uint32_t get_u16(const uint8_t *tab)
{
    uint16_t v;
    memcpy (&v, tab, sizeof (v));
    return v;
}

static inline int32_t get_i16(const uint8_t *tab)
{
    int16_t v;
    memcpy (&v, tab, sizeof (v));
    return v;
}

static inline void put_u16(uint8_t *tab, uint16_t val)
{
    memcpy (tab, &val, sizeof (val));
}

static inline uint32_t get_u8(const uint8_t *tab)
{
    return *tab;
}

static inline int32_t get_i8(const uint8_t *tab)
{
    return (int8_t)*tab;
}

static inline void put_u8(uint8_t *tab, uint8_t val)
{
    *tab = val;
}

static inline uint16_t bswap16(uint16_t x)
{
    return (x >> 8) | (x << 8);
}

static inline uint32_t bswap32(uint32_t v)
{
    return ((v & 0xff000000) >> 24) | ((v & 0x00ff0000) >>  8) |
        ((v & 0x0000ff00) <<  8) | ((v & 0x000000ff) << 24);
}

static inline uint64_t bswap64(uint64_t v)
{
    return ((v & ((uint64_t)0xff << (7 * 8))) >> (7 * 8)) |
        ((v & ((uint64_t)0xff << (6 * 8))) >> (5 * 8)) |
        ((v & ((uint64_t)0xff << (5 * 8))) >> (3 * 8)) |
        ((v & ((uint64_t)0xff << (4 * 8))) >> (1 * 8)) |
        ((v & ((uint64_t)0xff << (3 * 8))) << (1 * 8)) |
        ((v & ((uint64_t)0xff << (2 * 8))) << (3 * 8)) |
        ((v & ((uint64_t)0xff << (1 * 8))) << (5 * 8)) |
        ((v & ((uint64_t)0xff << (0 * 8))) << (7 * 8));
}

/* XXX: should take an extra argument to pass slack information to the caller */
typedef void *DynBufReallocFunc(void *opaque, void *ptr, size_t size);

typedef struct DynBuf {
    uint8_t *buf;
    size_t size;
    size_t allocated_size;
    BOOL error; /* true if a memory allocation error occurred */
    DynBufReallocFunc *realloc_func;
    void *opaque; /* for realloc_func */
} DynBuf;

void dbuf_init(DynBuf *s);
void dbuf_init2(DynBuf *s, void *opaque, DynBufReallocFunc *realloc_func);
int dbuf_realloc(DynBuf *s, size_t new_size);
int dbuf_write(DynBuf *s, size_t offset, const uint8_t *data, size_t len);
int dbuf_put(DynBuf *s, const uint8_t *data, size_t len);
int dbuf_put_self(DynBuf *s, size_t offset, size_t len);
int dbuf_putc(DynBuf *s, uint8_t c);
int dbuf_putstr(DynBuf *s, const char *str);
static inline int dbuf_put_u16(DynBuf *s, uint16_t val)
{
    return dbuf_put(s, (uint8_t *)&val, 2);
}
static inline int dbuf_put_u32(DynBuf *s, uint32_t val)
{
    return dbuf_put(s, (uint8_t *)&val, 4);
}
static inline int dbuf_put_u64(DynBuf *s, uint64_t val)
{
    return dbuf_put(s, (uint8_t *)&val, 8);
}
int dbuf_printf(DynBuf *s, const char *fmt, ...);
void dbuf_free(DynBuf *s);
static inline BOOL dbuf_error(DynBuf *s) {
    return s->error;
}
static inline void dbuf_set_error(DynBuf *s)
{
    s->error = TRUE;
}

static constexpr int UTF8_CHAR_LEN_MAX = 6;

int unicode_to_utf8(uint8_t *buf, unsigned int c);
int unicode_from_utf8(const uint8_t *p, int max_len, const uint8_t **pp);

static inline int from_hex(int c)
{
    if (c >= '0' && c <= '9')
        return c - '0';
    else if (c >= 'A' && c <= 'F')
        return c - 'A' + 10;
    else if (c >= 'a' && c <= 'f')
        return c - 'a' + 10;
    else
        return -1;
}

void rqsort(void *base, size_t nmemb, size_t size,
            int (*cmp)(const void *, const void *, void *),
            void *arg);

inline void pstrcpy(char *buf, int buf_size, const char *str)
{
    int c;
    char *q = buf;

    if (buf_size <= 0)
        return;

    for(;;) {
        c = *str++;
        if (c == 0 || q >= buf + buf_size - 1)
            break;
        *q++ = c;
    }
    *q = '\0';
}

/* strcat and truncate. */
inline char *pstrcat(char *buf, int buf_size, const char *s)
{
    int len;
    len = strlen(buf);
    if (len < buf_size)
        pstrcpy(buf + len, buf_size - len, s);
    return buf;
}

inline int strstart(const char *str, const char *val, const char **ptr)
{
    const char *p, *q;
    p = str;
    q = val;
    while (*q != '\0') {
        if (*p != *q)
            return 0;
        p++;
        q++;
    }
    if (ptr)
        *ptr = p;
    return 1;
}

inline int has_suffix(const char *str, const char *suffix)
{
    size_t len = strlen(str);
    size_t slen = strlen(suffix);
    return (len >= slen && !memcmp(str + len - slen, suffix, slen));
}

/* Dynamic buffer package */

static void *dbuf_default_realloc(void *opaque, void *ptr, size_t size)
{
    return realloc(ptr, size);
}

inline void dbuf_init2(DynBuf *s, void *opaque, DynBufReallocFunc *realloc_func)
{
    memset(s, 0, sizeof(*s));
    if (!realloc_func)
        realloc_func = dbuf_default_realloc;
    s->opaque = opaque;
    s->realloc_func = realloc_func;
}

inline void dbuf_init(DynBuf *s)
{
    dbuf_init2(s, NULL, NULL);
}

/* return < 0 if error */
inline int dbuf_realloc(DynBuf *s, size_t new_size)
{
    size_t size;
    uint8_t *new_buf;
    if (new_size > s->allocated_size) {
        if (s->error)
            return -1;
        size = s->allocated_size * 3 / 2;
        if (size > new_size)
            new_size = size;
        new_buf = (uint8_t*) s->realloc_func(s->opaque, s->buf, new_size);
        if (!new_buf) {
            s->error = TRUE;
            return -1;
        }
        s->buf = new_buf;
        s->allocated_size = new_size;
    }
    return 0;
}

inline int dbuf_write(DynBuf *s, size_t offset, const uint8_t *data, size_t len)
{
    size_t end;
    end = offset + len;
    if (dbuf_realloc(s, end))
        return -1;
    memcpy(s->buf + offset, data, len);
    if (end > s->size)
        s->size = end;
    return 0;
}

inline int dbuf_put(DynBuf *s, const uint8_t *data, size_t len)
{
    if (js_unlikely((s->size + len) > s->allocated_size)) {
        if (dbuf_realloc(s, s->size + len))
            return -1;
    }
    memcpy(s->buf + s->size, data, len);
    s->size += len;
    return 0;
}

inline int dbuf_put_self(DynBuf *s, size_t offset, size_t len)
{
    if (js_unlikely((s->size + len) > s->allocated_size)) {
        if (dbuf_realloc(s, s->size + len))
            return -1;
    }
    memcpy(s->buf + s->size, s->buf + offset, len);
    s->size += len;
    return 0;
}

inline int dbuf_putc(DynBuf *s, uint8_t c)
{
    return dbuf_put(s, &c, 1);
}

inline int dbuf_putstr(DynBuf *s, const char *str)
{
    return dbuf_put(s, (const uint8_t *)str, strlen(str));
}

inline int dbuf_printf(DynBuf *s, const char *fmt, ...)
{
    va_list ap;
    char buf[128];
    int len;

    va_start(ap, fmt);
    len = vsnprintf(buf, sizeof(buf), fmt, ap);
    va_end(ap);
    if (len < sizeof(buf)) {
        /* fast case */
        return dbuf_put(s, (uint8_t *)buf, len);
    } else {
        if (dbuf_realloc(s, s->size + len + 1))
            return -1;
        va_start(ap, fmt);
        vsnprintf((char *)(s->buf + s->size), s->allocated_size - s->size,
                  fmt, ap);
        va_end(ap);
        s->size += len;
    }
    return 0;
}

inline void dbuf_free(DynBuf *s)
{
    /* we test s->buf as a fail safe to avoid crashing if dbuf_free()
       is called twice */
    if (s->buf) {
        s->realloc_func(s->opaque, s->buf, 0);
    }
    memset(s, 0, sizeof(*s));
}

/* Note: at most 31 bits are encoded. At most UTF8_CHAR_LEN_MAX bytes
   are output. */
inline int unicode_to_utf8(uint8_t *buf, unsigned int c)
{
    uint8_t *q = buf;

    if (c < 0x80) {
        *q++ = c;
    } else {
        if (c < 0x800) {
            *q++ = (c >> 6) | 0xc0;
        } else {
            if (c < 0x10000) {
                *q++ = (c >> 12) | 0xe0;
            } else {
                if (c < 0x00200000) {
                    *q++ = (c >> 18) | 0xf0;
                } else {
                    if (c < 0x04000000) {
                        *q++ = (c >> 24) | 0xf8;
                    } else if (c < 0x80000000) {
                        *q++ = (c >> 30) | 0xfc;
                        *q++ = ((c >> 24) & 0x3f) | 0x80;
                    } else {
                        return 0;
                    }
                    *q++ = ((c >> 18) & 0x3f) | 0x80;
                }
                *q++ = ((c >> 12) & 0x3f) | 0x80;
            }
            *q++ = ((c >> 6) & 0x3f) | 0x80;
        }
        *q++ = (c & 0x3f) | 0x80;
    }
    return q - buf;
}

static const unsigned int utf8_min_code[5] = {
    0x80, 0x800, 0x10000, 0x00200000, 0x04000000,
};

static const unsigned char utf8_first_code_mask[5] = {
    0x1f, 0xf, 0x7, 0x3, 0x1,
};

/* return -1 if error. *pp is not updated in this case. max_len must
   be >= 1. The maximum length for a UTF8 byte sequence is 6 bytes. */
inline int unicode_from_utf8(const uint8_t *p, int max_len, const uint8_t **pp)
{
    int l, c, b, i;

    c = *p++;
    if (c < 0x80) {
        *pp = p;
        return c;
    }
    switch(c) {
    case 0xc0: case 0xc1: case 0xc2: case 0xc3:
    case 0xc4: case 0xc5: case 0xc6: case 0xc7:
    case 0xc8: case 0xc9: case 0xca: case 0xcb:
    case 0xcc: case 0xcd: case 0xce: case 0xcf:
    case 0xd0: case 0xd1: case 0xd2: case 0xd3:
    case 0xd4: case 0xd5: case 0xd6: case 0xd7:
    case 0xd8: case 0xd9: case 0xda: case 0xdb:
    case 0xdc: case 0xdd: case 0xde: case 0xdf:
        l = 1;
        break;
    case 0xe0: case 0xe1: case 0xe2: case 0xe3:
    case 0xe4: case 0xe5: case 0xe6: case 0xe7:
    case 0xe8: case 0xe9: case 0xea: case 0xeb:
    case 0xec: case 0xed: case 0xee: case 0xef:
        l = 2;
        break;
    case 0xf0: case 0xf1: case 0xf2: case 0xf3:
    case 0xf4: case 0xf5: case 0xf6: case 0xf7:
        l = 3;
        break;
    case 0xf8: case 0xf9: case 0xfa: case 0xfb:
        l = 4;
        break;
    case 0xfc: case 0xfd:
        l = 5;
        break;
    default:
        return -1;
    }
    /* check that we have enough characters */
    if (l > (max_len - 1))
        return -1;
    c &= utf8_first_code_mask[l - 1];
    for(i = 0; i < l; i++) {
        b = *p++;
        if (b < 0x80 || b >= 0xc0)
            return -1;
        c = (c << 6) | (b & 0x3f);
    }
    if (c < utf8_min_code[l - 1])
        return -1;
    *pp = p;
    return c;
}

typedef void (*exchange_f)(void *a, void *b, size_t size);
typedef int (*cmp_f)(const void *, const void *, void *opaque);

static void exchange_bytes(void *a, void *b, size_t size) {
    uint8_t *ap = (uint8_t *)a;
    uint8_t *bp = (uint8_t *)b;

    while (size-- != 0) {
        uint8_t t = *ap;
        *ap++ = *bp;
        *bp++ = t;
    }
}

static void exchange_one_byte(void *a, void *b, size_t size) {
    uint8_t *ap = (uint8_t *)a;
    uint8_t *bp = (uint8_t *)b;
    uint8_t t = *ap;
    *ap = *bp;
    *bp = t;
}

static void exchange_int16s(void *a, void *b, size_t size) {
    uint16_t *ap = (uint16_t *)a;
    uint16_t *bp = (uint16_t *)b;

    for (size /= sizeof(uint16_t); size-- != 0;) {
        uint16_t t = *ap;
        *ap++ = *bp;
        *bp++ = t;
    }
}

static void exchange_one_int16(void *a, void *b, size_t size) {
    uint16_t *ap = (uint16_t *)a;
    uint16_t *bp = (uint16_t *)b;
    uint16_t t = *ap;
    *ap = *bp;
    *bp = t;
}

static void exchange_int32s(void *a, void *b, size_t size) {
    uint32_t *ap = (uint32_t *)a;
    uint32_t *bp = (uint32_t *)b;

    for (size /= sizeof(uint32_t); size-- != 0;) {
        uint32_t t = *ap;
        *ap++ = *bp;
        *bp++ = t;
    }
}

static void exchange_one_int32(void *a, void *b, size_t size) {
    uint32_t *ap = (uint32_t *)a;
    uint32_t *bp = (uint32_t *)b;
    uint32_t t = *ap;
    *ap = *bp;
    *bp = t;
}

static void exchange_int64s(void *a, void *b, size_t size) {
    uint64_t *ap = (uint64_t *)a;
    uint64_t *bp = (uint64_t *)b;

    for (size /= sizeof(uint64_t); size-- != 0;) {
        uint64_t t = *ap;
        *ap++ = *bp;
        *bp++ = t;
    }
}

static void exchange_one_int64(void *a, void *b, size_t size) {
    uint64_t *ap = (uint64_t *)a;
    uint64_t *bp = (uint64_t *)b;
    uint64_t t = *ap;
    *ap = *bp;
    *bp = t;
}

static void exchange_int128s(void *a, void *b, size_t size) {
    uint64_t *ap = (uint64_t *)a;
    uint64_t *bp = (uint64_t *)b;

    for (size /= sizeof(uint64_t) * 2; size-- != 0; ap += 2, bp += 2) {
        uint64_t t = ap[0];
        uint64_t u = ap[1];
        ap[0] = bp[0];
        ap[1] = bp[1];
        bp[0] = t;
        bp[1] = u;
    }
}

static void exchange_one_int128(void *a, void *b, size_t size) {
    uint64_t *ap = (uint64_t *)a;
    uint64_t *bp = (uint64_t *)b;
    uint64_t t = ap[0];
    uint64_t u = ap[1];
    ap[0] = bp[0];
    ap[1] = bp[1];
    bp[0] = t;
    bp[1] = u;
}

static inline exchange_f exchange_func(const void *base, size_t size) {
    switch (((uintptr_t)base | (uintptr_t)size) & 15) {
    case 0:
        if (size == sizeof(uint64_t) * 2)
            return exchange_one_int128;
        else
            return exchange_int128s;
    case 8:
        if (size == sizeof(uint64_t))
            return exchange_one_int64;
        else
            return exchange_int64s;
    case 4:
    case 12:
        if (size == sizeof(uint32_t))
            return exchange_one_int32;
        else
            return exchange_int32s;
    case 2:
    case 6:
    case 10:
    case 14:
        if (size == sizeof(uint16_t))
            return exchange_one_int16;
        else
            return exchange_int16s;
    default:
        if (size == 1)
            return exchange_one_byte;
        else
            return exchange_bytes;
    }
}

static void heapsortx(void *base, size_t nmemb, size_t size, cmp_f cmp, void *opaque)
{
    uint8_t *basep = (uint8_t *)base;
    size_t i, n, c, r;
    exchange_f swap = exchange_func(base, size);

    if (nmemb > 1) {
        i = (nmemb / 2) * size;
        n = nmemb * size;

        while (i > 0) {
            i -= size;
            for (r = i; (c = r * 2 + size) < n; r = c) {
                if (c < n - size && cmp(basep + c, basep + c + size, opaque) <= 0)
                    c += size;
                if (cmp(basep + r, basep + c, opaque) > 0)
                    break;
                swap(basep + r, basep + c, size);
            }
        }
        for (i = n - size; i > 0; i -= size) {
            swap(basep, basep + i, size);

            for (r = 0; (c = r * 2 + size) < i; r = c) {
                if (c < i - size && cmp(basep + c, basep + c + size, opaque) <= 0)
                    c += size;
                if (cmp(basep + r, basep + c, opaque) > 0)
                    break;
                swap(basep + r, basep + c, size);
            }
        }
    }
}

static inline void *med3(void *a, void *b, void *c, cmp_f cmp, void *opaque)
{
    return cmp(a, b, opaque) < 0 ?
        (cmp(b, c, opaque) < 0 ? b : (cmp(a, c, opaque) < 0 ? c : a )) :
        (cmp(b, c, opaque) > 0 ? b : (cmp(a, c, opaque) < 0 ? a : c ));
}

/* pointer based version with local stack and insertion sort threshhold */
inline void rqsort(void *base, size_t nmemb, size_t size, cmp_f cmp, void *opaque)
{
    struct { uint8_t *base; size_t count; int depth; } stack[50], *sp = stack;
    uint8_t *ptr, *pi, *pj, *plt, *pgt, *top, *m;
    size_t m4, i, lt, gt, span, span2;
    int c, depth;
    exchange_f swap = exchange_func(base, size);
    exchange_f swap_block = exchange_func(base, size | 128);

    if (nmemb < 2 || size <= 0)
        return;

    sp->base = (uint8_t *)base;
    sp->count = nmemb;
    sp->depth = 0;
    sp++;

    while (sp > stack) {
        sp--;
        ptr = sp->base;
        nmemb = sp->count;
        depth = sp->depth;

        while (nmemb > 6) {
            if (++depth > 50) {
                /* depth check to ensure worst case logarithmic time */
                heapsortx(ptr, nmemb, size, cmp, opaque);
                nmemb = 0;
                break;
            }
            /* select median of 3 from 1/4, 1/2, 3/4 positions */
            /* should use median of 5 or 9? */
            m4 = (nmemb >> 2) * size;
            m = (uint8_t*) med3(ptr + m4, ptr + 2 * m4, ptr + 3 * m4, cmp, opaque);
            swap(ptr, m, size);  /* move the pivot to the start or the array */
            i = lt = 1;
            pi = plt = ptr + size;
            gt = nmemb;
            pj = pgt = top = ptr + nmemb * size;
            for (;;) {
                while (pi < pj && (c = cmp(ptr, pi, opaque)) >= 0) {
                    if (c == 0) {
                        swap(plt, pi, size);
                        lt++;
                        plt += size;
                    }
                    i++;
                    pi += size;
                }
                while (pi < (pj -= size) && (c = cmp(ptr, pj, opaque)) <= 0) {
                    if (c == 0) {
                        gt--;
                        pgt -= size;
                        swap(pgt, pj, size);
                    }
                }
                if (pi >= pj)
                    break;
                swap(pi, pj, size);
                i++;
                pi += size;
            }
            /* array has 4 parts:
             * from 0 to lt excluded: elements identical to pivot
             * from lt to pi excluded: elements smaller than pivot
             * from pi to gt excluded: elements greater than pivot
             * from gt to n excluded: elements identical to pivot
             */
            /* move elements identical to pivot in the middle of the array: */
            /* swap values in ranges [0..lt[ and [i-lt..i[
               swapping the smallest span between lt and i-lt is sufficient
             */
            span = plt - ptr;
            span2 = pi - plt;
            lt = i - lt;
            if (span > span2)
                span = span2;
            swap_block(ptr, pi - span, span);
            /* swap values in ranges [gt..top[ and [i..top-(top-gt)[
               swapping the smallest span between top-gt and gt-i is sufficient
             */
            span = top - pgt;
            span2 = pgt - pi;
            pgt = top - span2;
            gt = nmemb - (gt - i);
            if (span > span2)
                span = span2;
            swap_block(pi, top - span, span);

            /* now array has 3 parts:
             * from 0 to lt excluded: elements smaller than pivot
             * from lt to gt excluded: elements identical to pivot
             * from gt to n excluded: elements greater than pivot
             */
            /* stack the larger segment and keep processing the smaller one
               to minimize stack use for pathological distributions */
            if (lt > nmemb - gt) {
                sp->base = ptr;
                sp->count = lt;
                sp->depth = depth;
                sp++;
                ptr = pgt;
                nmemb -= gt;
            } else {
                sp->base = pgt;
                sp->count = nmemb - gt;
                sp->depth = depth;
                sp++;
                nmemb = lt;
            }
        }
        /* Use insertion sort for small fragments */
        for (pi = ptr + size, top = ptr + nmemb * size; pi < top; pi += size) {
            for (pj = pi; pj > ptr && cmp(pj - size, pj, opaque) > 0; pj -= size)
                swap(pj, pj - size, size);
        }
    }
}

using LRE_BOOL = int;       /* for documentation purposes */

enum
{
    LRE_FLAG_GLOBAL       = (1 << 0),
    LRE_FLAG_IGNORECASE   = (1 << 1),
    LRE_FLAG_MULTILINE    = (1 << 2),
    LRE_FLAG_DOTALL       = (1 << 3),
    LRE_FLAG_UTF16        = (1 << 4),
    LRE_FLAG_STICKY       = (1 << 5),
    LRE_FLAG_NAMED_GROUPS = (1 << 7) /* named groups are present in the regexp */
};

uint8_t *lre_compile(int *plen, char *error_msg, int error_msg_size,
                     const char *buf, size_t buf_len, int re_flags,
                     void *opaque);
int lre_get_capture_count(const uint8_t *bc_buf);
int lre_get_flags(const uint8_t *bc_buf);
const char *lre_get_groupnames(const uint8_t *bc_buf);
int lre_exec(uint8_t **capture,
             const uint8_t *bc_buf, const uint8_t *cbuf, int cindex, int clen,
             int cbuf_type, void *opaque);

int lre_parse_escape(const uint8_t **pp, int allow_utf16);
LRE_BOOL lre_is_space(int c);

/* must be provided by the user */
LRE_BOOL lre_check_stack_overflow(void *opaque, size_t alloca_size);
void *lre_realloc(void *opaque, void *ptr, size_t size);

/* JS identifier test */
extern uint32_t const lre_id_start_table_ascii[4];
extern uint32_t const lre_id_continue_table_ascii[4];

static inline int lre_js_is_ident_first(int c)
{
    if ((uint32_t)c < 128) {
        return (lre_id_start_table_ascii[c >> 5] >> (c & 31)) & 1;
    } else {
#ifdef CONFIG_ALL_UNICODE
        return lre_is_id_start(c);
#else
        return !lre_is_space(c);
#endif
    }
}

static inline int lre_js_is_ident_next(int c)
{
    if ((uint32_t)c < 128) {
        return (lre_id_continue_table_ascii[c >> 5] >> (c & 31)) & 1;
    } else {
        /* ZWNJ and ZWJ are accepted in identifiers */
#ifdef CONFIG_ALL_UNICODE
        return lre_is_id_continue(c) || c == 0x200C || c == 0x200D;
#else
        return !lre_is_space(c) || c == 0x200C || c == 0x200D;
#endif
    }
}


/* define it to include all the unicode tables (40KB larger) */
#define CONFIG_ALL_UNICODE

static constexpr int LRE_CC_RES_LEN_MAX = 3;

typedef enum {
    UNICODE_NFC,
    UNICODE_NFD,
    UNICODE_NFKC,
    UNICODE_NFKD,
} UnicodeNormalizationEnum;

int lre_case_conv(uint32_t *res, uint32_t c, int conv_type);
LRE_BOOL lre_is_cased(uint32_t c);
LRE_BOOL lre_is_case_ignorable(uint32_t c);

/* char ranges */

typedef struct {
    int len; /* in points, always even */
    int size;
    uint32_t *points; /* points sorted by increasing value */
    void *mem_opaque;
    void *(*realloc_func)(void *opaque, void *ptr, size_t size);
} CharRange;

typedef enum {
    CR_OP_UNION,
    CR_OP_INTER,
    CR_OP_XOR,
} CharRangeOpEnum;

void cr_init(CharRange *cr, void *mem_opaque, void *(*realloc_func)(void *opaque, void *ptr, size_t size));
void cr_free(CharRange *cr);
int cr_realloc(CharRange *cr, int size);
int cr_copy(CharRange *cr, const CharRange *cr1);

static inline int cr_add_point(CharRange *cr, uint32_t v)
{
    if (cr->len >= cr->size) {
        if (cr_realloc(cr, cr->len + 1))
            return -1;
    }
    cr->points[cr->len++] = v;
    return 0;
}

static inline int cr_add_interval(CharRange *cr, uint32_t c1, uint32_t c2)
{
    if ((cr->len + 2) > cr->size) {
        if (cr_realloc(cr, cr->len + 2))
            return -1;
    }
    cr->points[cr->len++] = c1;
    cr->points[cr->len++] = c2;
    return 0;
}

int cr_union1(CharRange *cr, const uint32_t *b_pt, int b_len);

static inline int cr_union_interval(CharRange *cr, uint32_t c1, uint32_t c2)
{
    uint32_t b_pt[2];
    b_pt[0] = c1;
    b_pt[1] = c2 + 1;
    return cr_union1(cr, b_pt, 2);
}

int cr_op(CharRange *cr, const uint32_t *a_pt, int a_len,
          const uint32_t *b_pt, int b_len, int op);

int cr_invert(CharRange *cr);

#ifdef CONFIG_ALL_UNICODE

LRE_BOOL lre_is_id_start(uint32_t c);
LRE_BOOL lre_is_id_continue(uint32_t c);

int unicode_normalize(uint32_t **pdst, const uint32_t *src, int src_len,
                      UnicodeNormalizationEnum n_type,
                      void *opaque, void *(*realloc_func)(void *opaque, void *ptr, size_t size));

/* Unicode character range functions */

int unicode_script(CharRange *cr,
                   const char *script_name, LRE_BOOL is_ext);
int unicode_general_category(CharRange *cr, const char *gc_name);
int unicode_prop(CharRange *cr, const char *prop_name);

#endif /* CONFIG_ALL_UNICODE */


static const uint32_t case_conv_table1[370] = {
    0x00209a30, 0x00309a00, 0x005a8173, 0x00601730, 0x006c0730, 0x006f81b3, 0x00701700, 0x007c0700,
    0x007f8100, 0x00803040, 0x009801c3, 0x00988190, 0x00990640, 0x009c9040, 0x00a481b4, 0x00a52e40,
    0x00bc0130, 0x00bc8640, 0x00bf8170, 0x00c00100, 0x00c08130, 0x00c10440, 0x00c30130, 0x00c38240,
    0x00c48230, 0x00c58240, 0x00c70130, 0x00c78130, 0x00c80130, 0x00c88240, 0x00c98130, 0x00ca0130,
    0x00ca8100, 0x00cb0130, 0x00cb8130, 0x00cc0240, 0x00cd0100, 0x00ce0130, 0x00ce8130, 0x00cf0100,
    0x00cf8130, 0x00d00640, 0x00d30130, 0x00d38240, 0x00d48130, 0x00d60240, 0x00d70130, 0x00d78240,
    0x00d88230, 0x00d98440, 0x00db8130, 0x00dc0240, 0x00de0240, 0x00df8100, 0x00e20350, 0x00e38350,
    0x00e50350, 0x00e69040, 0x00ee8100, 0x00ef1240, 0x00f801b4, 0x00f88350, 0x00fa0240, 0x00fb0130,
    0x00fb8130, 0x00fc2840, 0x01100130, 0x01111240, 0x011d0131, 0x011d8240, 0x011e8130, 0x011f0131,
    0x011f8201, 0x01208240, 0x01218130, 0x01220130, 0x01228130, 0x01230a40, 0x01280101, 0x01288101,
    0x01290101, 0x01298100, 0x012a0100, 0x012b0200, 0x012c8100, 0x012d8100, 0x012e0101, 0x01300100,
    0x01308101, 0x01318100, 0x01328101, 0x01330101, 0x01340100, 0x01348100, 0x01350101, 0x01358101,
    0x01360101, 0x01378100, 0x01388101, 0x01390100, 0x013a8100, 0x013e8101, 0x01400100, 0x01410101,
    0x01418100, 0x01438101, 0x01440100, 0x01448100, 0x01450200, 0x01460100, 0x01490100, 0x014e8101,
    0x014f0101, 0x01a28173, 0x01b80440, 0x01bb0240, 0x01bd8300, 0x01bf8130, 0x01c30130, 0x01c40330,
    0x01c60130, 0x01c70230, 0x01c801d0, 0x01c89130, 0x01d18930, 0x01d60100, 0x01d68300, 0x01d801d3,
    0x01d89100, 0x01e10173, 0x01e18900, 0x01e60100, 0x01e68200, 0x01e78130, 0x01e80173, 0x01e88173,
    0x01ea8173, 0x01eb0173, 0x01eb8100, 0x01ec1840, 0x01f80173, 0x01f88173, 0x01f90100, 0x01f98100,
    0x01fa01a0, 0x01fa8173, 0x01fb8240, 0x01fc8130, 0x01fd0240, 0x01fe8330, 0x02001030, 0x02082030,
    0x02182000, 0x02281000, 0x02302240, 0x02453640, 0x02600130, 0x02608e40, 0x02678100, 0x02686040,
    0x0298a630, 0x02b0a600, 0x02c381b5, 0x08502631, 0x08638131, 0x08668131, 0x08682b00, 0x087e8300,
    0x09d05011, 0x09f80610, 0x09fc0620, 0x0e400174, 0x0e408174, 0x0e410174, 0x0e418174, 0x0e420174,
    0x0e428174, 0x0e430174, 0x0e438180, 0x0e440180, 0x0e482b30, 0x0e5e8330, 0x0ebc8101, 0x0ebe8101,
    0x0ec70101, 0x0f007e40, 0x0f3f1840, 0x0f4b01b5, 0x0f4b81b6, 0x0f4c01b6, 0x0f4c81b6, 0x0f4d01b7,
    0x0f4d8180, 0x0f4f0130, 0x0f506040, 0x0f800800, 0x0f840830, 0x0f880600, 0x0f8c0630, 0x0f900800,
    0x0f940830, 0x0f980800, 0x0f9c0830, 0x0fa00600, 0x0fa40630, 0x0fa801b0, 0x0fa88100, 0x0fa901d3,
    0x0fa98100, 0x0faa01d3, 0x0faa8100, 0x0fab01d3, 0x0fab8100, 0x0fac8130, 0x0fad8130, 0x0fae8130,
    0x0faf8130, 0x0fb00800, 0x0fb40830, 0x0fb80200, 0x0fb90400, 0x0fbb0200, 0x0fbc0201, 0x0fbd0201,
    0x0fbe0201, 0x0fc008b7, 0x0fc40867, 0x0fc808b8, 0x0fcc0868, 0x0fd008b8, 0x0fd40868, 0x0fd80200,
    0x0fd901b9, 0x0fd981b1, 0x0fda01b9, 0x0fdb01b1, 0x0fdb81d7, 0x0fdc0230, 0x0fdd0230, 0x0fde0161,
    0x0fdf0173, 0x0fe101b9, 0x0fe181b2, 0x0fe201ba, 0x0fe301b2, 0x0fe381d8, 0x0fe40430, 0x0fe60162,
    0x0fe80200, 0x0fe901d0, 0x0fe981d0, 0x0feb01b0, 0x0feb81d0, 0x0fec0230, 0x0fed0230, 0x0ff00201,
    0x0ff101d3, 0x0ff181d3, 0x0ff201ba, 0x0ff28101, 0x0ff301b0, 0x0ff381d3, 0x0ff40230, 0x0ff50230,
    0x0ff60131, 0x0ff901ba, 0x0ff981b2, 0x0ffa01bb, 0x0ffb01b2, 0x0ffb81d9, 0x0ffc0230, 0x0ffd0230,
    0x0ffe0162, 0x109301a0, 0x109501a0, 0x109581a0, 0x10990131, 0x10a70101, 0x10b01031, 0x10b81001,
    0x10c18240, 0x125b1a31, 0x12681a01, 0x16003031, 0x16183001, 0x16300240, 0x16310130, 0x16318130,
    0x16320130, 0x16328100, 0x16330100, 0x16338640, 0x16368130, 0x16370130, 0x16378130, 0x16380130,
    0x16390240, 0x163a8240, 0x163f0230, 0x16406440, 0x16758440, 0x16790240, 0x16802600, 0x16938100,
    0x16968100, 0x53202e40, 0x53401c40, 0x53910e40, 0x53993e40, 0x53bc8440, 0x53be8130, 0x53bf0a40,
    0x53c58240, 0x53c68130, 0x53c80440, 0x53ca0101, 0x53cb1440, 0x53d50130, 0x53d58130, 0x53d60130,
    0x53d68130, 0x53d70130, 0x53d80130, 0x53d88130, 0x53d90130, 0x53d98131, 0x53da1040, 0x53e20131,
    0x53e28130, 0x53e30130, 0x53e38440, 0x53e80240, 0x53eb0440, 0x53fa8240, 0x55a98101, 0x55b85020,
    0x7d8001b2, 0x7d8081b2, 0x7d8101b2, 0x7d8181da, 0x7d8201da, 0x7d8281b3, 0x7d8301b3, 0x7d8981bb,
    0x7d8a01bb, 0x7d8a81bb, 0x7d8b01bc, 0x7d8b81bb, 0x7f909a31, 0x7fa09a01, 0x82002831, 0x82142801,
    0x82582431, 0x826c2401, 0x82b80b31, 0x82be0f31, 0x82c60731, 0x82ca0231, 0x82cb8b01, 0x82d18f01,
    0x82d98701, 0x82dd8201, 0x86403331, 0x86603301, 0x8c502031, 0x8c602001, 0xb7202031, 0xb7302001,
    0xf4802231, 0xf4912201,
};

static const uint8_t case_conv_table2[370] = {
    0x01, 0x00, 0x9c, 0x06, 0x07, 0x4d, 0x03, 0x04, 0x10, 0x00, 0x8f, 0x0b, 0x00, 0x00, 0x11, 0x00,
    0x08, 0x00, 0x53, 0x4a, 0x51, 0x00, 0x52, 0x00, 0x53, 0x00, 0x3a, 0x54, 0x55, 0x00, 0x57, 0x59,
    0x3f, 0x5d, 0x5c, 0x00, 0x46, 0x61, 0x63, 0x42, 0x64, 0x00, 0x66, 0x00, 0x68, 0x00, 0x6a, 0x00,
    0x6c, 0x00, 0x6e, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x1a, 0x00, 0x93, 0x00, 0x00, 0x20,
    0x35, 0x00, 0x27, 0x00, 0x21, 0x00, 0x24, 0x22, 0x2a, 0x00, 0x13, 0x6b, 0x6d, 0x00, 0x26, 0x24,
    0x27, 0x14, 0x16, 0x18, 0x1b, 0x1c, 0x3e, 0x1e, 0x3f, 0x1f, 0x39, 0x3d, 0x22, 0x21, 0x41, 0x1e,
    0x40, 0x25, 0x25, 0x26, 0x28, 0x20, 0x2a, 0x48, 0x2c, 0x43, 0x2e, 0x4b, 0x30, 0x4c, 0x32, 0x44,
    0x42, 0x99, 0x00, 0x00, 0x95, 0x8f, 0x7d, 0x7e, 0x83, 0x84, 0x12, 0x80, 0x82, 0x76, 0x77, 0x12,
    0x7b, 0xa3, 0x7c, 0x78, 0x79, 0x8a, 0x92, 0x98, 0xa6, 0xa0, 0x85, 0x00, 0x9a, 0xa1, 0x93, 0x75,
    0x33, 0x95, 0x00, 0x8e, 0x00, 0x74, 0x99, 0x98, 0x97, 0x96, 0x00, 0x00, 0x9e, 0x00, 0x9c, 0x00,
    0xa1, 0xa0, 0x15, 0x2e, 0x2f, 0x30, 0xb4, 0xb5, 0x4f, 0xaa, 0xa9, 0x12, 0x14, 0x1e, 0x21, 0x22,
    0x22, 0x2a, 0x34, 0x35, 0xa6, 0xa7, 0x36, 0x1f, 0x49, 0x00, 0x00, 0x97, 0x01, 0x5a, 0xda, 0x1d,
    0x36, 0x05, 0x00, 0xc4, 0xc3, 0xc6, 0xc5, 0xc8, 0xc7, 0xca, 0xc9, 0xcc, 0xcb, 0xc4, 0xd5, 0x45,
    0xd6, 0x42, 0xd7, 0x46, 0xd8, 0xce, 0xd0, 0xd2, 0xd4, 0xda, 0xd9, 0xee, 0xf6, 0xfe, 0x0e, 0x07,
    0x0f, 0x80, 0x9f, 0x00, 0x21, 0x80, 0xa3, 0xed, 0x00, 0xc0, 0x40, 0xc6, 0x60, 0xe7, 0xdb, 0xe6,
    0x99, 0xc0, 0x00, 0x00, 0x06, 0x60, 0xdc, 0x29, 0xfd, 0x15, 0x12, 0x06, 0x16, 0xf8, 0xdd, 0x06,
    0x15, 0x12, 0x84, 0x08, 0xc6, 0x16, 0xff, 0xdf, 0x03, 0xc0, 0x40, 0x00, 0x46, 0x60, 0xde, 0xe0,
    0x6d, 0x37, 0x38, 0x39, 0x15, 0x14, 0x17, 0x16, 0x00, 0x1a, 0x19, 0x1c, 0x1b, 0x00, 0x5f, 0xb7,
    0x65, 0x44, 0x47, 0x00, 0x4f, 0x62, 0x4e, 0x50, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00, 0xa3, 0xa4,
    0xa5, 0x00, 0x00, 0x00, 0x00, 0x00, 0xb6, 0x00, 0x00, 0x5a, 0x00, 0x47, 0x00, 0x5b, 0x56, 0x58,
    0x60, 0x5e, 0x70, 0x69, 0x6f, 0x4e, 0x00, 0x3b, 0x67, 0xb8, 0x00, 0x00, 0x00, 0x00, 0x45, 0xa8,
    0x8a, 0x8b, 0x8c, 0xab, 0xac, 0x58, 0x58, 0xaf, 0x94, 0xb0, 0x6f, 0xb2, 0x5d, 0x5c, 0x5f, 0x5e,
    0x61, 0x60, 0x66, 0x67, 0x68, 0x69, 0x62, 0x63, 0x64, 0x65, 0x6b, 0x6a, 0x6d, 0x6c, 0x6f, 0x6e,
    0x71, 0x70,
};

static const uint16_t case_conv_ext[58] = {
    0x0399, 0x0308, 0x0301, 0x03a5, 0x0313, 0x0300, 0x0342, 0x0391, 0x0397, 0x03a9, 0x0046, 0x0049, 0x004c, 0x0053, 0x0069, 0x0307,
    0x02bc, 0x004e, 0x004a, 0x030c, 0x0535, 0x0552, 0x0048, 0x0331, 0x0054, 0x0057, 0x030a, 0x0059, 0x0041, 0x02be, 0x1f08, 0x1f80,
    0x1f28, 0x1f90, 0x1f68, 0x1fa0, 0x1fba, 0x0386, 0x1fb3, 0x1fca, 0x0389, 0x1fc3, 0x03a1, 0x1ffa, 0x038f, 0x1ff3, 0x0544, 0x0546,
    0x053b, 0x054e, 0x053d, 0x03b8, 0x0462, 0xa64a, 0x1e60, 0x03c9,
    0x006b, 0x00e5,
};

static const uint8_t unicode_prop_Cased1_table[188] = {
    0x40, 0xa9, 0x80, 0x8e, 0x80, 0xfc, 0x80, 0xd3, 0x80, 0x8c, 0x80, 0x8d, 0x81, 0x8d, 0x02, 0x80,
    0xe1, 0x80, 0x91, 0x85, 0x9a, 0x01, 0x00, 0x01, 0x11, 0x00, 0x01, 0x04, 0x08, 0x01, 0x08, 0x30,
    0x08, 0x01, 0x15, 0x20, 0x00, 0x39, 0x99, 0x31, 0x9d, 0x84, 0x40, 0x94, 0x80, 0xd6, 0x82, 0xa6,
    0x80, 0x41, 0x62, 0x80, 0xa6, 0x80, 0x57, 0x76, 0xf8, 0x02, 0x80, 0x8f, 0x80, 0xb0, 0x40, 0xdb,
    0x08, 0x80, 0x41, 0xd0, 0x80, 0x8c, 0x80, 0x8f, 0x8c, 0xe4, 0x03, 0x01, 0x89, 0x00, 0x14, 0x28,
    0x10, 0x11, 0x02, 0x01, 0x18, 0x0b, 0x24, 0x4b, 0x26, 0x01, 0x01, 0x86, 0xe5, 0x80, 0x60, 0x79,
    0xb6, 0x81, 0x40, 0x91, 0x81, 0xbd, 0x88, 0x94, 0x05, 0x80, 0x98, 0x80, 0xa2, 0x00, 0x80, 0xa1,
    0x82, 0x43, 0x34, 0xa2, 0x06, 0x80, 0x8c, 0x60, 0x5c, 0x16, 0x01, 0x10, 0xa9, 0x80, 0x88, 0x60,
    0xcc, 0x44, 0xd4, 0x80, 0xc6, 0x01, 0x08, 0x09, 0x0b, 0x80, 0x8b, 0x00, 0x06, 0x80, 0xc0, 0x03,
    0x0f, 0x06, 0x80, 0x9b, 0x03, 0x04, 0x00, 0x16, 0x80, 0x41, 0x53, 0x81, 0x98, 0x80, 0x98, 0x80,
    0x9e, 0x80, 0x98, 0x80, 0x9e, 0x80, 0x98, 0x80, 0x9e, 0x80, 0x98, 0x80, 0x9e, 0x80, 0x98, 0x07,
    0x47, 0x33, 0x89, 0x80, 0x93, 0x52, 0x10, 0x99, 0x85, 0x99, 0x85, 0x99,
};

static const uint8_t unicode_prop_Cased1_index[18] = {
    0xb9, 0x02, 0xe0, 0xa0, 0x1e, 0x40, 0x9e, 0xa6, 0x40, 0x55, 0xd4, 0x61, 0xfb, 0xd6, 0x21, 0x8a, 0xf1, 0x01,
};

static const uint8_t unicode_prop_Case_Ignorable_table[720] = {
    0xa6, 0x05, 0x80, 0x8a, 0x80, 0xa2, 0x00, 0x80, 0xc6, 0x03, 0x00, 0x03, 0x01, 0x81, 0x41, 0xf6,
    0x40, 0xbf, 0x19, 0x18, 0x88, 0x08, 0x80, 0x40, 0xfa, 0x86, 0x40, 0xce, 0x04, 0x80, 0xb0, 0xac,
    0x00, 0x01, 0x01, 0x00, 0xab, 0x80, 0x8a, 0x85, 0x89, 0x8a, 0x00, 0xa2, 0x80, 0x89, 0x94, 0x8f,
    0x80, 0xe4, 0x38, 0x89, 0x03, 0xa0, 0x00, 0x80, 0x9d, 0x9a, 0xda, 0x8a, 0xb9, 0x8a, 0x18, 0x08,
    0x97, 0x97, 0xaa, 0x82, 0xab, 0x06, 0x0d, 0x87, 0xa8, 0xb9, 0xb6, 0x00, 0x03, 0x3b, 0x02, 0x86,
    0x89, 0x81, 0x8c, 0x80, 0x8e, 0x80, 0xb9, 0x03, 0x1f, 0x80, 0x93, 0x81, 0x99, 0x01, 0x81, 0xb8,
    0x03, 0x0b, 0x09, 0x12, 0x80, 0x9d, 0x0a, 0x80, 0x8a, 0x81, 0xb8, 0x03, 0x20, 0x0b, 0x80, 0x93,
    0x81, 0x95, 0x28, 0x80, 0xb9, 0x01, 0x00, 0x1f, 0x06, 0x81, 0x8a, 0x81, 0x9d, 0x80, 0xbc, 0x80,
    0x8b, 0x80, 0xb1, 0x02, 0x80, 0xb6, 0x00, 0x14, 0x10, 0x1e, 0x81, 0x8a, 0x81, 0x9c, 0x80, 0xb9,
    0x01, 0x05, 0x04, 0x81, 0x93, 0x81, 0x9b, 0x81, 0xb8, 0x0b, 0x1f, 0x80, 0x93, 0x81, 0x9c, 0x80,
    0xc7, 0x06, 0x10, 0x80, 0xd9, 0x01, 0x86, 0x8a, 0x88, 0xe1, 0x01, 0x88, 0x88, 0x00, 0x85, 0xc9,
    0x81, 0x9a, 0x00, 0x00, 0x80, 0xb6, 0x8d, 0x04, 0x01, 0x84, 0x8a, 0x80, 0xa3, 0x88, 0x80, 0xe5,
    0x18, 0x28, 0x09, 0x81, 0x98, 0x0b, 0x82, 0x8f, 0x83, 0x8c, 0x01, 0x0d, 0x80, 0x8e, 0x80, 0xdd,
    0x80, 0x42, 0x5f, 0x82, 0x43, 0xb1, 0x82, 0x9c, 0x81, 0x9d, 0x81, 0x9d, 0x81, 0xbf, 0x08, 0x37,
    0x01, 0x8a, 0x10, 0x20, 0xac, 0x84, 0xb2, 0x80, 0xc0, 0x81, 0xa1, 0x80, 0xf5, 0x13, 0x81, 0x88,
    0x05, 0x82, 0x40, 0xda, 0x09, 0x80, 0xb9, 0x00, 0x30, 0x00, 0x01, 0x3d, 0x89, 0x08, 0xa6, 0x07,
    0x9e, 0xb0, 0x83, 0xaf, 0x00, 0x20, 0x04, 0x80, 0xa7, 0x88, 0x8b, 0x81, 0x9f, 0x19, 0x08, 0x82,
    0xb7, 0x00, 0x0a, 0x00, 0x82, 0xb9, 0x39, 0x81, 0xbf, 0x85, 0xd1, 0x10, 0x8c, 0x06, 0x18, 0x28,
    0x11, 0xb1, 0xbe, 0x8c, 0x80, 0xa1, 0xe4, 0x41, 0xbc, 0x00, 0x82, 0x8a, 0x82, 0x8c, 0x82, 0x8c,
    0x82, 0x8c, 0x81, 0x8b, 0x27, 0x81, 0x89, 0x01, 0x01, 0x84, 0xb0, 0x20, 0x89, 0x00, 0x8c, 0x80,
    0x8f, 0x8c, 0xb2, 0xa0, 0x4b, 0x8a, 0x81, 0xf0, 0x82, 0xfc, 0x80, 0x8e, 0x80, 0xdf, 0x9f, 0xae,
    0x80, 0x41, 0xd4, 0x80, 0xa3, 0x1a, 0x24, 0x80, 0xdc, 0x85, 0xdc, 0x82, 0x60, 0x6f, 0x15, 0x80,
    0x44, 0xe1, 0x85, 0x41, 0x0d, 0x80, 0xe1, 0x18, 0x89, 0x00, 0x9b, 0x83, 0xcf, 0x81, 0x8d, 0xa1,
    0xcd, 0x80, 0x96, 0x82, 0xe6, 0x12, 0x0f, 0x02, 0x03, 0x80, 0x98, 0x0c, 0x80, 0x40, 0x96, 0x81,
    0x99, 0x91, 0x8c, 0x80, 0xa5, 0x87, 0x98, 0x8a, 0xad, 0x82, 0xaf, 0x01, 0x19, 0x81, 0x90, 0x80,
    0x94, 0x81, 0xc1, 0x29, 0x09, 0x81, 0x8b, 0x07, 0x80, 0xa2, 0x80, 0x8a, 0x80, 0xb2, 0x00, 0x11,
    0x0c, 0x08, 0x80, 0x9a, 0x80, 0x8d, 0x0c, 0x08, 0x80, 0xe3, 0x84, 0x88, 0x82, 0xf8, 0x01, 0x03,
    0x80, 0x60, 0x4f, 0x2f, 0x80, 0x40, 0x92, 0x90, 0x42, 0x3c, 0x8f, 0x10, 0x8b, 0x8f, 0xa1, 0x01,
    0x80, 0x40, 0xa8, 0x06, 0x05, 0x80, 0x8a, 0x80, 0xa2, 0x00, 0x80, 0xae, 0x80, 0xac, 0x81, 0xc2,
    0x80, 0x94, 0x82, 0x42, 0x00, 0x80, 0x40, 0xe1, 0x80, 0x40, 0x94, 0x84, 0x44, 0x04, 0x28, 0xa9,
    0x80, 0x88, 0x42, 0x45, 0x10, 0x0c, 0x83, 0xa7, 0x13, 0x80, 0x40, 0xa4, 0x81, 0x42, 0x3c, 0x83,
    0x41, 0x82, 0x81, 0x40, 0x98, 0x8a, 0xb0, 0x83, 0xfa, 0x80, 0xb5, 0x8e, 0xa8, 0x01, 0x81, 0x89,
    0x82, 0xb0, 0x19, 0x09, 0x03, 0x80, 0x89, 0x80, 0xb1, 0x82, 0xa3, 0x20, 0x87, 0xbd, 0x80, 0x8b,
    0x81, 0xb3, 0x88, 0x89, 0x19, 0x80, 0xde, 0x11, 0x00, 0x0d, 0x80, 0x40, 0x9f, 0x02, 0x87, 0x94,
    0x81, 0xb8, 0x0a, 0x80, 0xa4, 0x32, 0x84, 0x40, 0xc2, 0x39, 0x10, 0x80, 0x96, 0x80, 0xd3, 0x28,
    0x03, 0x08, 0x81, 0x40, 0xed, 0x1d, 0x08, 0x81, 0x9a, 0x81, 0xd4, 0x39, 0x00, 0x81, 0xe9, 0x00,
    0x01, 0x28, 0x80, 0xe4, 0x11, 0x18, 0x84, 0x41, 0x02, 0x88, 0x01, 0x40, 0xff, 0x08, 0x03, 0x80,
    0x40, 0x8f, 0x19, 0x0b, 0x80, 0x9f, 0x89, 0xa7, 0x29, 0x1f, 0x80, 0x88, 0x29, 0x82, 0xad, 0x8c,
    0x01, 0x41, 0x95, 0x30, 0x28, 0x80, 0xd1, 0x95, 0x0e, 0x01, 0x01, 0xf9, 0x2a, 0x00, 0x08, 0x30,
    0x80, 0xc7, 0x0a, 0x00, 0x80, 0x41, 0x5a, 0x81, 0x55, 0x3a, 0x88, 0x60, 0x36, 0xb6, 0x84, 0xba,
    0x86, 0x88, 0x83, 0x44, 0x0a, 0x80, 0xbe, 0x90, 0xbf, 0x08, 0x81, 0x60, 0x40, 0x0a, 0x18, 0x30,
    0x81, 0x4c, 0x9d, 0x08, 0x83, 0x52, 0x5b, 0xad, 0x81, 0x96, 0x42, 0x1f, 0x82, 0x88, 0x8f, 0x0e,
    0x9d, 0x83, 0x40, 0x93, 0x82, 0x47, 0xba, 0xb6, 0x83, 0xb1, 0x38, 0x8d, 0x80, 0x95, 0x20, 0x8e,
    0x45, 0x4f, 0x30, 0x90, 0x0e, 0x01, 0x04, 0x41, 0x04, 0x8d, 0x41, 0x6f, 0x80, 0xbc, 0x83, 0x45,
    0xdf, 0x86, 0xec, 0x87, 0x4a, 0xae, 0x84, 0x6c, 0x0c, 0x00, 0x80, 0x9d, 0xdf, 0xff, 0x40, 0xef,
};

static const uint8_t unicode_prop_Case_Ignorable_index[69] = {
    0xbe, 0x05, 0x00, 0xfe, 0x07, 0x00, 0x52, 0x0a, 0xa0, 0xc1, 0x0b, 0x00, 0x82, 0x0d, 0x00, 0x3f,
    0x10, 0x80, 0xd4, 0x17, 0x40, 0xcf, 0x1a, 0x20, 0xf5, 0x1c, 0x00, 0x80, 0x20, 0x00, 0x16, 0xa0,
    0x00, 0xc6, 0xa8, 0x00, 0xc2, 0xaa, 0x60, 0x56, 0xfe, 0x20, 0xb1, 0x07, 0x01, 0x82, 0x10, 0x21,
    0x02, 0x13, 0x21, 0xb8, 0x16, 0x61, 0x97, 0x1a, 0x01, 0x37, 0x6b, 0x21, 0x8c, 0xd1, 0x01, 0xd7,
    0xe8, 0x41, 0xf0, 0x01, 0x0e,
};

static const uint8_t unicode_prop_ID_Start_table[1079] = {
    0xc0, 0x99, 0x85, 0x99, 0xae, 0x80, 0x89, 0x03, 0x04, 0x96, 0x80, 0x9e, 0x80, 0x41, 0xc9, 0x83,
    0x8b, 0x8d, 0x26, 0x00, 0x80, 0x40, 0x80, 0x20, 0x09, 0x18, 0x05, 0x00, 0x10, 0x00, 0x93, 0x80,
    0xd2, 0x80, 0x40, 0x8a, 0x87, 0x40, 0xa5, 0x80, 0xa5, 0x08, 0x85, 0xa8, 0xc6, 0x9a, 0x1b, 0xac,
    0xaa, 0xa2, 0x08, 0xe2, 0x00, 0x8e, 0x0e, 0x81, 0x89, 0x11, 0x80, 0x8f, 0x00, 0x9d, 0x9c, 0xd8,
    0x8a, 0x80, 0x97, 0xa0, 0x88, 0x0b, 0x04, 0x95, 0x18, 0x88, 0x02, 0x80, 0x96, 0x98, 0x86, 0x8a,
    0x84, 0x97, 0x05, 0x90, 0xa9, 0xb9, 0xb5, 0x10, 0x91, 0x06, 0x89, 0x8e, 0x8f, 0x1f, 0x09, 0x81,
    0x95, 0x06, 0x00, 0x13, 0x10, 0x8f, 0x80, 0x8c, 0x08, 0x82, 0x8d, 0x81, 0x89, 0x07, 0x2b, 0x09,
    0x95, 0x06, 0x01, 0x01, 0x01, 0x9e, 0x18, 0x80, 0x92, 0x82, 0x8f, 0x88, 0x02, 0x80, 0x95, 0x06,
    0x01, 0x04, 0x10, 0x91, 0x80, 0x8e, 0x81, 0x96, 0x80, 0x8a, 0x39, 0x09, 0x95, 0x06, 0x01, 0x04,
    0x10, 0x9d, 0x08, 0x82, 0x8e, 0x80, 0x90, 0x00, 0x2a, 0x10, 0x1a, 0x08, 0x00, 0x0a, 0x0a, 0x12,
    0x8b, 0x95, 0x80, 0xb3, 0x38, 0x10, 0x96, 0x80, 0x8f, 0x10, 0x99, 0x11, 0x01, 0x81, 0x9d, 0x03,
    0x38, 0x10, 0x96, 0x80, 0x89, 0x04, 0x10, 0x9e, 0x08, 0x81, 0x8e, 0x81, 0x90, 0x88, 0x02, 0x80,
    0xa8, 0x08, 0x8f, 0x04, 0x17, 0x82, 0x97, 0x2c, 0x91, 0x82, 0x97, 0x80, 0x88, 0x00, 0x0e, 0xb9,
    0xaf, 0x01, 0x8b, 0x86, 0xb9, 0x08, 0x00, 0x20, 0x97, 0x00, 0x80, 0x89, 0x01, 0x88, 0x01, 0x20,
    0x80, 0x94, 0x83, 0x9f, 0x80, 0xbe, 0x38, 0xa3, 0x9a, 0x84, 0xf2, 0xaa, 0x93, 0x80, 0x8f, 0x2b,
    0x1a, 0x02, 0x0e, 0x13, 0x8c, 0x8b, 0x80, 0x90, 0xa5, 0x00, 0x20, 0x81, 0xaa, 0x80, 0x41, 0x4c,
    0x03, 0x0e, 0x00, 0x03, 0x81, 0xa8, 0x03, 0x81, 0xa0, 0x03, 0x0e, 0x00, 0x03, 0x81, 0x8e, 0x80,
    0xb8, 0x03, 0x81, 0xc2, 0xa4, 0x8f, 0x8f, 0xd5, 0x0d, 0x82, 0x42, 0x6b, 0x81, 0x90, 0x80, 0x99,
    0x84, 0xca, 0x82, 0x8a, 0x86, 0x91, 0x8c, 0x92, 0x8d, 0x91, 0x8d, 0x8c, 0x02, 0x8e, 0xb3, 0xa2,
    0x03, 0x80, 0xc2, 0xd8, 0x86, 0xa8, 0x00, 0x84, 0xc5, 0x89, 0x9e, 0xb0, 0x9d, 0x0c, 0x8a, 0xab,
    0x83, 0x99, 0xb5, 0x96, 0x88, 0xb4, 0xd1, 0x80, 0xdc, 0xae, 0x90, 0x87, 0xb5, 0x9d, 0x8c, 0x81,
    0x89, 0xab, 0x99, 0xa3, 0xa8, 0x82, 0x89, 0xa3, 0x81, 0x88, 0x86, 0xaa, 0x0a, 0xa8, 0x18, 0x28,
    0x0a, 0x04, 0x40, 0xbf, 0xbf, 0x41, 0x15, 0x0d, 0x81, 0xa5, 0x0d, 0x0f, 0x00, 0x00, 0x00, 0x80,
    0x9e, 0x81, 0xb4, 0x06, 0x00, 0x12, 0x06, 0x13, 0x0d, 0x83, 0x8c, 0x22, 0x06, 0xf3, 0x80, 0x8c,
    0x80, 0x8f, 0x8c, 0xe4, 0x03, 0x01, 0x89, 0x00, 0x0d, 0x28, 0x00, 0x00, 0x80, 0x8f, 0x0b, 0x24,
    0x18, 0x90, 0xa8, 0x4a, 0x76, 0x40, 0xe4, 0x2b, 0x11, 0x8b, 0xa5, 0x00, 0x20, 0x81, 0xb7, 0x30,
    0x8f, 0x96, 0x88, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x86, 0x42, 0x25, 0x82, 0x98, 0x88,
    0x34, 0x0c, 0x83, 0xd5, 0x1c, 0x80, 0xd9, 0x03, 0x84, 0xaa, 0x80, 0xdd, 0x90, 0x9f, 0xaf, 0x8f,
    0x41, 0xff, 0x59, 0xbf, 0xbf, 0x60, 0x56, 0x8c, 0xc2, 0xad, 0x81, 0x41, 0x0c, 0x82, 0x8f, 0x89,
    0x81, 0x93, 0xae, 0x8f, 0x9e, 0x81, 0xcf, 0xa6, 0x88, 0x81, 0xe6, 0x81, 0xbf, 0x21, 0x00, 0x04,
    0x97, 0x8f, 0x02, 0x03, 0x80, 0x96, 0x9c, 0xb3, 0x8d, 0xb1, 0xbd, 0x2a, 0x00, 0x81, 0x8a, 0x9b,
    0x89, 0x96, 0x98, 0x9c, 0x86, 0xae, 0x9b, 0x80, 0x8f, 0x20, 0x89, 0x89, 0x20, 0xa8, 0x96, 0x10,
    0x87, 0x93, 0x96, 0x10, 0x82, 0xb1, 0x00, 0x11, 0x0c, 0x08, 0x00, 0x97, 0x11, 0x8a, 0x32, 0x8b,
    0x29, 0x29, 0x85, 0x88, 0x30, 0x30, 0xaa, 0x80, 0x8d, 0x85, 0xf2, 0x9c, 0x60, 0x2b, 0xa3, 0x8b,
    0x96, 0x83, 0xb0, 0x60, 0x21, 0x03, 0x41, 0x6d, 0x81, 0xe9, 0xa5, 0x86, 0x8b, 0x24, 0x00, 0x89,
    0x80, 0x8c, 0x04, 0x00, 0x01, 0x01, 0x80, 0xeb, 0xa0, 0x41, 0x6a, 0x91, 0xbf, 0x81, 0xb5, 0xa7,
    0x8b, 0xf3, 0x20, 0x40, 0x86, 0xa3, 0x99, 0x85, 0x99, 0x8a, 0xd8, 0x15, 0x0d, 0x0d, 0x0a, 0xa2,
    0x8b, 0x80, 0x99, 0x80, 0x92, 0x01, 0x80, 0x8e, 0x81, 0x8d, 0xa1, 0xfa, 0xc4, 0xb4, 0x41, 0x0a,
    0x9c, 0x82, 0xb0, 0xae, 0x9f, 0x8c, 0x9d, 0x84, 0xa5, 0x89, 0x9d, 0x81, 0xa3, 0x1f, 0x04, 0xa9,
    0x40, 0x9d, 0x91, 0xa3, 0x83, 0xa3, 0x83, 0xa7, 0x87, 0xb3, 0x8b, 0x8a, 0x80, 0x8e, 0x06, 0x01,
    0x80, 0x8a, 0x80, 0x8e, 0x06, 0x01, 0xc2, 0x41, 0x36, 0x88, 0x95, 0x89, 0x87, 0x97, 0x28, 0xa9,
    0x80, 0x88, 0xc4, 0x29, 0x00, 0xab, 0x01, 0x10, 0x81, 0x96, 0x89, 0x96, 0x88, 0x9e, 0xc0, 0x92,
    0x01, 0x89, 0x95, 0x89, 0x99, 0xc5, 0xb7, 0x29, 0xbf, 0x80, 0x8e, 0x18, 0x10, 0x9c, 0xa9, 0x9c,
    0x82, 0x9c, 0xa2, 0x38, 0x9b, 0x9a, 0xb5, 0x89, 0x95, 0x89, 0x92, 0x8c, 0x91, 0xed, 0xc8, 0xb6,
    0xb2, 0x8c, 0xb2, 0x8c, 0xa3, 0x41, 0x5b, 0xa9, 0x29, 0xcd, 0x9c, 0x89, 0x07, 0x95, 0xa9, 0x91,
    0xad, 0x94, 0x9a, 0x96, 0x8b, 0xb4, 0xb8, 0x09, 0x80, 0x8c, 0xac, 0x9f, 0x98, 0x99, 0xa3, 0x9c,
    0x01, 0x07, 0xa2, 0x10, 0x8b, 0xaf, 0x8d, 0x83, 0x94, 0x00, 0x80, 0xa2, 0x91, 0x80, 0x98, 0xd3,
    0x30, 0x00, 0x18, 0x8e, 0x80, 0x89, 0x86, 0xae, 0xa5, 0x39, 0x09, 0x95, 0x06, 0x01, 0x04, 0x10,
    0x91, 0x80, 0x8b, 0x84, 0x40, 0x9d, 0xb4, 0x91, 0x83, 0x93, 0x82, 0x9d, 0xaf, 0x93, 0x08, 0x80,
    0x40, 0xb7, 0xae, 0xa8, 0x83, 0xa3, 0xaf, 0x93, 0x80, 0xba, 0xaa, 0x8c, 0x80, 0xc6, 0x9a, 0xa4,
    0x86, 0x40, 0xb8, 0xab, 0xf3, 0xbf, 0x9e, 0x39, 0x01, 0x38, 0x08, 0x97, 0x8e, 0x00, 0x80, 0xdd,
    0x39, 0xa6, 0x8f, 0x00, 0x80, 0x9b, 0x80, 0x89, 0xa7, 0x30, 0x94, 0x80, 0x8a, 0xad, 0x92, 0x80,
    0x91, 0xc8, 0x41, 0x06, 0x88, 0x80, 0xa4, 0x90, 0x80, 0xb0, 0x9d, 0xef, 0x30, 0x08, 0xa5, 0x94,
    0x80, 0x98, 0x28, 0x08, 0x9f, 0x8d, 0x80, 0x41, 0x46, 0x92, 0x40, 0xbc, 0x80, 0xce, 0x43, 0x99,
    0xe5, 0xee, 0x90, 0x40, 0xc3, 0x4a, 0x4b, 0xe0, 0x8e, 0x44, 0x2e, 0x4f, 0xd0, 0x42, 0x46, 0x60,
    0x21, 0xb8, 0x42, 0x38, 0x86, 0x9e, 0x90, 0xce, 0x90, 0x9d, 0x91, 0xaf, 0x8f, 0x83, 0x9e, 0x94,
    0x84, 0x92, 0x42, 0xaf, 0xbf, 0xff, 0xca, 0x20, 0xc1, 0x8c, 0xbf, 0x08, 0x80, 0x9b, 0x57, 0xf7,
    0x87, 0x44, 0xd5, 0xa9, 0x88, 0x60, 0x22, 0xe6, 0x18, 0x30, 0x08, 0x41, 0x22, 0xac, 0x82, 0x90,
    0x1f, 0x41, 0x8b, 0x49, 0x03, 0xea, 0x84, 0x8c, 0x82, 0x88, 0x86, 0x89, 0x57, 0x65, 0xd4, 0x80,
    0xc6, 0x01, 0x08, 0x09, 0x0b, 0x80, 0x8b, 0x00, 0x06, 0x80, 0xc0, 0x03, 0x0f, 0x06, 0x80, 0x9b,
    0x03, 0x04, 0x00, 0x16, 0x80, 0x41, 0x53, 0x81, 0x98, 0x80, 0x98, 0x80, 0x9e, 0x80, 0x98, 0x80,
    0x9e, 0x80, 0x98, 0x80, 0x9e, 0x80, 0x98, 0x80, 0x9e, 0x80, 0x98, 0x07, 0x47, 0x33, 0x9e, 0x41,
    0xe0, 0xac, 0x89, 0x86, 0x8f, 0x80, 0x41, 0x40, 0x9d, 0x91, 0xab, 0x44, 0xf3, 0x30, 0x18, 0x08,
    0x8e, 0x80, 0x40, 0xc4, 0xba, 0xc3, 0x30, 0x44, 0xb3, 0x18, 0x9a, 0x01, 0x00, 0x08, 0x80, 0x89,
    0x03, 0x00, 0x00, 0x28, 0x18, 0x00, 0x00, 0x02, 0x01, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x0b, 0x06, 0x03, 0x03, 0x00, 0x80, 0x89, 0x80, 0x90, 0x22, 0x04, 0x80, 0x90, 0x51, 0x43,
    0x60, 0xa6, 0xdf, 0x9f, 0x50, 0x38, 0x86, 0x40, 0xdd, 0x81, 0x56, 0x81, 0x8d, 0x5d, 0x30, 0x4c,
    0x1e, 0x42, 0x1d, 0x45, 0xe1, 0x53, 0x4a,
};

static const uint8_t unicode_prop_ID_Start_index[102] = {
    0xf6, 0x03, 0x20, 0xa6, 0x07, 0x00, 0xa9, 0x09, 0x20, 0xb1, 0x0a, 0x00, 0xba, 0x0b, 0x20, 0x3b,
    0x0d, 0x20, 0xc7, 0x0e, 0x20, 0x49, 0x12, 0x00, 0x9b, 0x16, 0x00, 0xac, 0x19, 0x00, 0xc0, 0x1d,
    0x80, 0x80, 0x20, 0x20, 0x70, 0x2d, 0x00, 0x00, 0x32, 0x00, 0xda, 0xa7, 0x00, 0x4c, 0xaa, 0x20,
    0xc7, 0xd7, 0x20, 0xfc, 0xfd, 0x20, 0x9d, 0x02, 0x21, 0x96, 0x05, 0x01, 0xf3, 0x08, 0x01, 0xb3,
    0x0c, 0x21, 0x73, 0x11, 0x61, 0x3e, 0x13, 0x01, 0x47, 0x17, 0x21, 0x9e, 0x1a, 0x01, 0x9a, 0x23,
    0x01, 0x78, 0x6b, 0x01, 0xfc, 0xb2, 0x61, 0x3a, 0xd5, 0x01, 0x2d, 0xe1, 0x41, 0x33, 0xee, 0x01,
    0xe0, 0xa6, 0x62, 0x4b, 0x13, 0x03,
};

static const uint8_t unicode_prop_ID_Continue1_table[640] = {
    0xaf, 0x89, 0xa4, 0x80, 0xd6, 0x80, 0x42, 0x47, 0xef, 0x96, 0x80, 0x40, 0xfa, 0x84, 0x41, 0x08,
    0xac, 0x00, 0x01, 0x01, 0x00, 0xc7, 0x8a, 0xaf, 0x9e, 0x28, 0xe4, 0x31, 0x29, 0x08, 0x19, 0x89,
    0x96, 0x80, 0x9d, 0x9a, 0xda, 0x8a, 0x8e, 0x89, 0xa0, 0x88, 0x88, 0x80, 0x97, 0x18, 0x88, 0x02,
    0x04, 0xaa, 0x82, 0xbb, 0x87, 0xa9, 0x97, 0x80, 0xa0, 0xb5, 0x10, 0x91, 0x06, 0x89, 0x09, 0x89,
    0x90, 0x82, 0xb7, 0x00, 0x31, 0x09, 0x82, 0x88, 0x80, 0x89, 0x09, 0x89, 0x8d, 0x01, 0x82, 0xb7,
    0x00, 0x23, 0x09, 0x12, 0x80, 0x93, 0x8b, 0x10, 0x8a, 0x82, 0xb7, 0x00, 0x38, 0x10, 0x82, 0x93,
    0x09, 0x89, 0x89, 0x28, 0x82, 0xb7, 0x00, 0x31, 0x09, 0x16, 0x82, 0x89, 0x09, 0x89, 0x91, 0x80,
    0xba, 0x22, 0x10, 0x83, 0x88, 0x80, 0x8d, 0x89, 0x8f, 0x84, 0xb6, 0x00, 0x30, 0x10, 0x1e, 0x81,
    0x8a, 0x09, 0x89, 0x90, 0x82, 0xb7, 0x00, 0x30, 0x10, 0x1e, 0x81, 0x8a, 0x09, 0x89, 0x8f, 0x83,
    0xb6, 0x08, 0x30, 0x10, 0x83, 0x88, 0x80, 0x89, 0x09, 0x89, 0x90, 0x82, 0xc5, 0x03, 0x28, 0x00,
    0x3d, 0x89, 0x09, 0xbc, 0x01, 0x86, 0x8b, 0x38, 0x89, 0xd6, 0x01, 0x88, 0x8a, 0x29, 0x89, 0xbd,
    0x0d, 0x89, 0x8a, 0x00, 0x00, 0x03, 0x81, 0xb0, 0x93, 0x01, 0x84, 0x8a, 0x80, 0xa3, 0x88, 0x80,
    0xe3, 0x93, 0x80, 0x89, 0x8b, 0x1b, 0x10, 0x11, 0x32, 0x83, 0x8c, 0x8b, 0x80, 0x8e, 0x42, 0xbe,
    0x82, 0x88, 0x88, 0x43, 0x9f, 0x83, 0x9b, 0x82, 0x9c, 0x81, 0x9d, 0x81, 0xbf, 0x9f, 0x88, 0x01,
    0x89, 0xa0, 0x10, 0x8a, 0x40, 0x8e, 0x80, 0xf5, 0x8b, 0x83, 0x8b, 0x89, 0x89, 0xff, 0x8a, 0xbb,
    0x84, 0xb8, 0x89, 0x80, 0x9c, 0x81, 0x8a, 0x85, 0x89, 0x95, 0x8d, 0x80, 0x8f, 0xb0, 0x84, 0xae,
    0x90, 0x8a, 0x89, 0x90, 0x88, 0x8b, 0x82, 0x9d, 0x8c, 0x81, 0x89, 0xab, 0x8d, 0xaf, 0x93, 0x87,
    0x89, 0x85, 0x89, 0xf5, 0x10, 0x94, 0x18, 0x28, 0x0a, 0x40, 0xc5, 0xbf, 0x42, 0x3e, 0x81, 0x92,
    0x80, 0xfa, 0x8c, 0x18, 0x82, 0x8b, 0x4b, 0xfd, 0x82, 0x40, 0x8c, 0x80, 0xdf, 0x9f, 0x42, 0x29,
    0x85, 0xe8, 0x81, 0x60, 0x75, 0x84, 0x89, 0xc4, 0x03, 0x89, 0x9f, 0x81, 0xcf, 0x81, 0x41, 0x0f,
    0x02, 0x03, 0x80, 0x96, 0x23, 0x80, 0xd2, 0x81, 0xb1, 0x91, 0x89, 0x89, 0x85, 0x91, 0x8c, 0x8a,
    0x9b, 0x87, 0x98, 0x8c, 0xab, 0x83, 0xae, 0x8d, 0x8e, 0x89, 0x8a, 0x80, 0x89, 0x89, 0xae, 0x8d,
    0x8b, 0x07, 0x09, 0x89, 0xa0, 0x82, 0xb1, 0x00, 0x11, 0x0c, 0x08, 0x80, 0xa8, 0x24, 0x81, 0x40,
    0xeb, 0x38, 0x09, 0x89, 0x60, 0x4f, 0x23, 0x80, 0x42, 0xe0, 0x8f, 0x8f, 0x8f, 0x11, 0x97, 0x82,
    0x40, 0xbf, 0x89, 0xa4, 0x80, 0x42, 0xbc, 0x80, 0x40, 0xe1, 0x80, 0x40, 0x94, 0x84, 0x41, 0x24,
    0x89, 0x45, 0x56, 0x10, 0x0c, 0x83, 0xa7, 0x13, 0x80, 0x40, 0xa4, 0x81, 0x42, 0x3c, 0x1f, 0x89,
    0x41, 0x70, 0x81, 0x40, 0x98, 0x8a, 0xb0, 0x83, 0xf9, 0x82, 0xb4, 0x8e, 0x9e, 0x8a, 0x09, 0x89,
    0x83, 0xac, 0x8a, 0x30, 0xac, 0x89, 0x2a, 0xa3, 0x8d, 0x80, 0x89, 0x21, 0xab, 0x80, 0x8b, 0x82,
    0xaf, 0x8d, 0x3b, 0x80, 0x8b, 0xd1, 0x8b, 0x28, 0x40, 0x9f, 0x8b, 0x84, 0x89, 0x2b, 0xb6, 0x08,
    0x31, 0x09, 0x82, 0x88, 0x80, 0x89, 0x09, 0x32, 0x84, 0x40, 0xbf, 0x91, 0x88, 0x89, 0x18, 0xd0,
    0x93, 0x8b, 0x89, 0x40, 0xd4, 0x31, 0x88, 0x9a, 0x81, 0xd1, 0x90, 0x8e, 0x89, 0xd0, 0x8c, 0x87,
    0x89, 0xd2, 0x8e, 0x83, 0x89, 0x40, 0xf1, 0x8e, 0x40, 0xa4, 0x89, 0xc5, 0x28, 0x09, 0x18, 0x00,
    0x81, 0x8b, 0x89, 0xf6, 0x31, 0x32, 0x80, 0x9b, 0x89, 0xa7, 0x30, 0x1f, 0x80, 0x88, 0x8a, 0xad,
    0x8f, 0x41, 0x94, 0x38, 0x87, 0x8f, 0x89, 0xb7, 0x95, 0x80, 0x8d, 0xf9, 0x2a, 0x00, 0x08, 0x30,
    0x07, 0x89, 0xaf, 0x20, 0x08, 0x27, 0x89, 0x41, 0x48, 0x83, 0x60, 0x4b, 0x68, 0x89, 0xd5, 0x89,
    0xa5, 0x84, 0xba, 0x86, 0x98, 0x89, 0x43, 0xf4, 0x00, 0xb6, 0x33, 0xd0, 0x80, 0x8a, 0x81, 0x60,
    0x4c, 0xaa, 0x81, 0x52, 0x60, 0xad, 0x81, 0x96, 0x42, 0x1d, 0x22, 0x2f, 0x39, 0x86, 0x9d, 0x83,
    0x40, 0x93, 0x82, 0x45, 0x88, 0xb1, 0x41, 0xff, 0xb6, 0x83, 0xb1, 0x38, 0x8d, 0x80, 0x95, 0x20,
    0x8e, 0x45, 0x4f, 0x30, 0x90, 0x0e, 0x01, 0x04, 0x41, 0x04, 0x86, 0x88, 0x89, 0x41, 0x63, 0x80,
    0xbc, 0x8d, 0x45, 0xd5, 0x86, 0xec, 0x34, 0x89, 0x52, 0x95, 0x89, 0x6c, 0x05, 0x05, 0x40, 0xef,
};

static const uint8_t unicode_prop_ID_Continue1_index[60] = {
    0xfa, 0x06, 0x00, 0x70, 0x09, 0x00, 0xf0, 0x0a, 0x40, 0x57, 0x0c, 0x00, 0xf0, 0x0d, 0x40, 0xc7,
    0x0f, 0x00, 0xea, 0x17, 0x20, 0x45, 0x1b, 0x20, 0x55, 0x20, 0x20, 0x0c, 0xa8, 0x60, 0x37, 0xaa,
    0x00, 0x50, 0xfe, 0x00, 0x3a, 0x0d, 0x01, 0x83, 0x11, 0x01, 0xc4, 0x14, 0x21, 0x44, 0x19, 0x21,
    0x5a, 0x1d, 0x41, 0x9f, 0xbc, 0x61, 0xb0, 0xda, 0x21, 0xf0, 0x01, 0x0e,
};

#ifdef CONFIG_ALL_UNICODE

static const uint8_t unicode_cc_table[881] = {
    0xb2, 0xcf, 0xd4, 0x00, 0xe8, 0x03, 0xdc, 0x00, 0xe8, 0x00, 0xd8, 0x04, 0xdc, 0x01, 0xca, 0x03,
    0xdc, 0x01, 0xca, 0x0a, 0xdc, 0x04, 0x01, 0x03, 0xdc, 0xc7, 0x00, 0xf0, 0xc0, 0x02, 0xdc, 0xc2,
    0x01, 0xdc, 0x80, 0xc2, 0x03, 0xdc, 0xc0, 0x00, 0xe8, 0x01, 0xdc, 0xc0, 0x41, 0xe9, 0x00, 0xea,
    0x41, 0xe9, 0x00, 0xea, 0x00, 0xe9, 0xcc, 0xb0, 0xe2, 0xc4, 0xb0, 0xd8, 0x00, 0xdc, 0xc3, 0x00,
    0xdc, 0xc2, 0x00, 0xde, 0x00, 0xdc, 0xc5, 0x05, 0xdc, 0xc1, 0x00, 0xdc, 0xc1, 0x00, 0xde, 0x00,
    0xe4, 0xc0, 0x49, 0x0a, 0x43, 0x13, 0x80, 0x00, 0x17, 0x80, 0x41, 0x18, 0x80, 0xc0, 0x00, 0xdc,
    0x80, 0x00, 0x12, 0xb0, 0x17, 0xc7, 0x42, 0x1e, 0xaf, 0x47, 0x1b, 0xc1, 0x01, 0xdc, 0xc4, 0x00,
    0xdc, 0xc1, 0x00, 0xdc, 0x8f, 0x00, 0x23, 0xb0, 0x34, 0xc6, 0x81, 0xc3, 0x00, 0xdc, 0xc0, 0x81,
    0xc1, 0x80, 0x00, 0xdc, 0xc1, 0x00, 0xdc, 0xa2, 0x00, 0x24, 0x9d, 0xc0, 0x00, 0xdc, 0xc1, 0x00,
    0xdc, 0xc1, 0x02, 0xdc, 0xc0, 0x01, 0xdc, 0xc0, 0x00, 0xdc, 0xc2, 0x00, 0xdc, 0xc0, 0x00, 0xdc,
    0xc0, 0x00, 0xdc, 0xc0, 0x00, 0xdc, 0xc1, 0xb0, 0x6f, 0xc6, 0x00, 0xdc, 0xc0, 0x88, 0x00, 0xdc,
    0x97, 0xc3, 0x80, 0xc8, 0x80, 0xc2, 0x80, 0xc4, 0xaa, 0x02, 0xdc, 0xb0, 0x0b, 0xc0, 0x02, 0xdc,
    0xc3, 0xa9, 0xc4, 0x04, 0xdc, 0xcd, 0x80, 0x00, 0xdc, 0xc1, 0x00, 0xdc, 0xc1, 0x00, 0xdc, 0xc2,
    0x02, 0xdc, 0x42, 0x1b, 0xc2, 0x00, 0xdc, 0xc1, 0x01, 0xdc, 0xc4, 0xb0, 0x0b, 0x00, 0x07, 0x8f,
    0x00, 0x09, 0x82, 0xc0, 0x00, 0xdc, 0xc1, 0xb0, 0x36, 0x00, 0x07, 0x8f, 0x00, 0x09, 0xaf, 0xc0,
    0xb0, 0x0c, 0x00, 0x07, 0x8f, 0x00, 0x09, 0xb0, 0x3d, 0x00, 0x07, 0x8f, 0x00, 0x09, 0xb0, 0x3d,
    0x00, 0x07, 0x8f, 0x00, 0x09, 0xb0, 0x4e, 0x00, 0x09, 0xb0, 0x3d, 0x00, 0x07, 0x8f, 0x00, 0x09,
    0x86, 0x00, 0x54, 0x00, 0x5b, 0xb0, 0x34, 0x00, 0x07, 0x8f, 0x00, 0x09, 0xb0, 0x3c, 0x01, 0x09,
    0x8f, 0x00, 0x09, 0xb0, 0x4b, 0x00, 0x09, 0xb0, 0x3c, 0x01, 0x67, 0x00, 0x09, 0x8c, 0x03, 0x6b,
    0xb0, 0x3b, 0x01, 0x76, 0x00, 0x09, 0x8c, 0x03, 0x7a, 0xb0, 0x1b, 0x01, 0xdc, 0x9a, 0x00, 0xdc,
    0x80, 0x00, 0xdc, 0x80, 0x00, 0xd8, 0xb0, 0x06, 0x41, 0x81, 0x80, 0x00, 0x84, 0x84, 0x03, 0x82,
    0x81, 0x00, 0x82, 0x80, 0xc1, 0x00, 0x09, 0x80, 0xc1, 0xb0, 0x0d, 0x00, 0xdc, 0xb0, 0x3f, 0x00,
    0x07, 0x80, 0x01, 0x09, 0xb0, 0x21, 0x00, 0xdc, 0xb2, 0x9e, 0xc2, 0xb3, 0x83, 0x01, 0x09, 0x9d,
    0x00, 0x09, 0xb0, 0x6c, 0x00, 0x09, 0x89, 0xc0, 0xb0, 0x9a, 0x00, 0xe4, 0xb0, 0x5e, 0x00, 0xde,
    0xc0, 0x00, 0xdc, 0xb0, 0xaa, 0xc0, 0x00, 0xdc, 0xb0, 0x16, 0x00, 0x09, 0x93, 0xc7, 0x81, 0x00,
    0xdc, 0xaf, 0xc4, 0x05, 0xdc, 0xc1, 0x00, 0xdc, 0x80, 0x01, 0xdc, 0xc1, 0x01, 0xdc, 0xc4, 0x00,
    0xdc, 0xc3, 0xb0, 0x34, 0x00, 0x07, 0x8e, 0x00, 0x09, 0xa5, 0xc0, 0x00, 0xdc, 0xc6, 0xb0, 0x05,
    0x01, 0x09, 0xb0, 0x09, 0x00, 0x07, 0x8a, 0x01, 0x09, 0xb0, 0x12, 0x00, 0x07, 0xb0, 0x67, 0xc2,
    0x41, 0x00, 0x04, 0xdc, 0xc1, 0x03, 0xdc, 0xc0, 0x41, 0x00, 0x05, 0x01, 0x83, 0x00, 0xdc, 0x85,
    0xc0, 0x82, 0xc1, 0xb0, 0x95, 0xc1, 0x00, 0xdc, 0xc6, 0x00, 0xdc, 0xc1, 0x00, 0xea, 0x00, 0xd6,
    0x00, 0xdc, 0x00, 0xca, 0xe4, 0x00, 0xe8, 0x01, 0xe4, 0x00, 0xdc, 0x00, 0xda, 0xc0, 0x00, 0xe9,
    0x00, 0xdc, 0xc0, 0x00, 0xdc, 0xb2, 0x9f, 0xc1, 0x01, 0x01, 0xc3, 0x02, 0x01, 0xc1, 0x83, 0xc0,
    0x82, 0x01, 0x01, 0xc0, 0x00, 0xdc, 0xc0, 0x01, 0x01, 0x03, 0xdc, 0xc0, 0xb8, 0x03, 0xcd, 0xc2,
    0xb0, 0x5c, 0x00, 0x09, 0xb0, 0x2f, 0xdf, 0xb1, 0xf9, 0x00, 0xda, 0x00, 0xe4, 0x00, 0xe8, 0x00,
    0xde, 0x01, 0xe0, 0xb0, 0x38, 0x01, 0x08, 0xb8, 0x6d, 0xa3, 0xc0, 0x83, 0xc9, 0x9f, 0xc1, 0xb0,
    0x1f, 0xc1, 0xb0, 0xe3, 0x00, 0x09, 0xa4, 0x00, 0x09, 0xb0, 0x66, 0x00, 0x09, 0x9a, 0xd1, 0xb0,
    0x08, 0x02, 0xdc, 0xa4, 0x00, 0x09, 0xb0, 0x2e, 0x00, 0x07, 0x8b, 0x00, 0x09, 0xb0, 0xbe, 0xc0,
    0x80, 0xc1, 0x00, 0xdc, 0x81, 0xc1, 0x84, 0xc1, 0x80, 0xc0, 0xb0, 0x03, 0x00, 0x09, 0xb0, 0xc5,
    0x00, 0x09, 0xb8, 0x46, 0xff, 0x00, 0x1a, 0xb2, 0xd0, 0xc6, 0x06, 0xdc, 0xc1, 0xb3, 0x9c, 0x00,
    0xdc, 0xb0, 0xb1, 0x00, 0xdc, 0xb0, 0x64, 0xc4, 0xb6, 0x61, 0x00, 0xdc, 0x80, 0xc0, 0xa7, 0xc0,
    0x00, 0x01, 0x00, 0xdc, 0x83, 0x00, 0x09, 0xb0, 0x74, 0xc0, 0x00, 0xdc, 0xb2, 0x0c, 0xc3, 0xb1,
    0x52, 0xc1, 0xb0, 0x68, 0x01, 0xdc, 0xc2, 0x00, 0xdc, 0xc0, 0x03, 0xdc, 0xb0, 0x00, 0xc0, 0x00,
    0xdc, 0xc0, 0x00, 0xdc, 0xb0, 0x8f, 0x00, 0x09, 0xa8, 0x00, 0x09, 0x8d, 0x00, 0x09, 0xb0, 0x08,
    0x00, 0x09, 0x00, 0x07, 0xb0, 0x14, 0xc2, 0xaf, 0x01, 0x09, 0xb0, 0x0d, 0x00, 0x07, 0xb0, 0x1b,
    0x00, 0x09, 0x88, 0x00, 0x07, 0xb0, 0x39, 0x00, 0x09, 0x00, 0x07, 0xb0, 0x81, 0x00, 0x07, 0x00,
    0x09, 0xb0, 0x1f, 0x01, 0x07, 0x8f, 0x00, 0x09, 0x97, 0xc6, 0x82, 0xc4, 0xb0, 0x9c, 0x00, 0x09,
    0x82, 0x00, 0x07, 0x96, 0xc0, 0xb0, 0x32, 0x00, 0x09, 0x00, 0x07, 0xb0, 0xca, 0x00, 0x09, 0x00,
    0x07, 0xb0, 0x4d, 0x00, 0x09, 0xb0, 0x45, 0x00, 0x09, 0x00, 0x07, 0xb0, 0x42, 0x00, 0x09, 0xb0,
    0xdc, 0x00, 0x09, 0x00, 0x07, 0xb0, 0xd1, 0x01, 0x09, 0x83, 0x00, 0x07, 0xb0, 0x6b, 0x00, 0x09,
    0xb0, 0x22, 0x00, 0x09, 0x91, 0x00, 0x09, 0xb0, 0x20, 0x00, 0x09, 0xb1, 0x74, 0x00, 0x09, 0xb0,
    0xd1, 0x00, 0x07, 0x80, 0x01, 0x09, 0xb0, 0x20, 0x00, 0x09, 0xb8, 0x45, 0x27, 0x04, 0x01, 0xb0,
    0x0a, 0xc6, 0xb4, 0x88, 0x01, 0x06, 0xb8, 0x44, 0x7b, 0x00, 0x01, 0xb8, 0x0c, 0x95, 0x01, 0xd8,
    0x02, 0x01, 0x82, 0x00, 0xe2, 0x04, 0xd8, 0x87, 0x07, 0xdc, 0x81, 0xc4, 0x01, 0xdc, 0x9d, 0xc3,
    0xb0, 0x63, 0xc2, 0xb8, 0x05, 0x8a, 0xc6, 0x80, 0xd0, 0x81, 0xc6, 0x80, 0xc1, 0x80, 0xc4, 0xb0,
    0xd4, 0xc6, 0xb1, 0x46, 0xc0, 0xb0, 0x0c, 0xc3, 0xb5, 0xaf, 0x06, 0xdc, 0xb0, 0x3c, 0xc5, 0x00,
    0x07,
};

static const uint8_t unicode_cc_index[84] = {
    0x4d, 0x03, 0x00, 0x97, 0x05, 0x20, 0xc6, 0x05, 0x00, 0xe7, 0x06, 0x00, 0x45, 0x07, 0x00, 0x9c,
    0x08, 0x00, 0x4d, 0x09, 0x00, 0x3c, 0x0b, 0x00, 0x3d, 0x0d, 0x00, 0x36, 0x0f, 0x00, 0x38, 0x10,
    0x20, 0x3a, 0x19, 0x00, 0xcb, 0x1a, 0x20, 0xd3, 0x1c, 0x00, 0xcf, 0x1d, 0x00, 0xe2, 0x20, 0x00,
    0x2e, 0x30, 0x20, 0x2b, 0xa9, 0x20, 0xed, 0xab, 0x00, 0x39, 0x0a, 0x01, 0x84, 0x0f, 0x21, 0xc0,
    0x11, 0x01, 0x43, 0x14, 0x01, 0x39, 0x18, 0x21, 0x42, 0x1d, 0x21, 0x67, 0xd1, 0x01, 0x30, 0xe1,
    0x21, 0x4b, 0xe9, 0x01,
};

static const uint32_t unicode_decomp_table1[693] = {
    0x00280081, 0x002a0097, 0x002a8081, 0x002bc097, 0x002c8115, 0x002d0097, 0x002d4081, 0x002e0097,
    0x002e4115, 0x002f0199, 0x00302016, 0x00400842, 0x00448a42, 0x004a0442, 0x004c0096, 0x004c8117,
    0x004d0242, 0x004e4342, 0x004fc12f, 0x0050c342, 0x005240bf, 0x00530342, 0x00550942, 0x005a0842,
    0x005e0096, 0x005e4342, 0x005fc081, 0x00680142, 0x006bc142, 0x00710185, 0x0071c317, 0x00734844,
    0x00778344, 0x00798342, 0x007b02be, 0x007c4197, 0x007d0142, 0x007e0444, 0x00800e42, 0x00878142,
    0x00898744, 0x00ac0483, 0x00b60317, 0x00b80283, 0x00d00214, 0x00d10096, 0x00dd0080, 0x00de8097,
    0x00df8080, 0x00e10097, 0x00e1413e, 0x00e1c080, 0x00e204be, 0x00ea83ae, 0x00f282ae, 0x00f401ad,
    0x00f4c12e, 0x00f54103, 0x00fc0303, 0x00fe4081, 0x0100023e, 0x0101c0be, 0x010301be, 0x010640be,
    0x010e40be, 0x0114023e, 0x0115c0be, 0x011701be, 0x011d8144, 0x01304144, 0x01340244, 0x01358144,
    0x01368344, 0x01388344, 0x013a8644, 0x013e0144, 0x0161c085, 0x018882ae, 0x019d422f, 0x01b00184,
    0x01b4c084, 0x024a4084, 0x024c4084, 0x024d0084, 0x0256042e, 0x0272c12e, 0x02770120, 0x0277c084,
    0x028cc084, 0x028d8084, 0x029641ae, 0x02978084, 0x02d20084, 0x02d2c12e, 0x02d70120, 0x02e50084,
    0x02f281ae, 0x03120084, 0x03300084, 0x0331c122, 0x0332812e, 0x035281ae, 0x03768084, 0x037701ae,
    0x038cc085, 0x03acc085, 0x03b7012f, 0x03c30081, 0x03d0c084, 0x03d34084, 0x03d48084, 0x03d5c084,
    0x03d70084, 0x03da4084, 0x03dcc084, 0x03dd412e, 0x03ddc085, 0x03de0084, 0x03de4085, 0x03e04084,
    0x03e4c084, 0x03e74084, 0x03e88084, 0x03e9c084, 0x03eb0084, 0x03ee4084, 0x04098084, 0x043f0081,
    0x06c18484, 0x06c48084, 0x06cec184, 0x06d00120, 0x06d0c084, 0x074b0383, 0x074cc41f, 0x074f1783,
    0x075e0081, 0x0766d283, 0x07801d44, 0x078e8942, 0x07931844, 0x079f0d42, 0x07a58216, 0x07a68085,
    0x07a6c0be, 0x07a80d44, 0x07aea044, 0x07c00122, 0x07c08344, 0x07c20122, 0x07c28344, 0x07c40122,
    0x07c48244, 0x07c60122, 0x07c68244, 0x07c8113e, 0x07d08244, 0x07d20122, 0x07d28244, 0x07d40122,
    0x07d48344, 0x07d64c3e, 0x07dc4080, 0x07dc80be, 0x07dcc080, 0x07dd00be, 0x07dd4080, 0x07dd80be,
    0x07ddc080, 0x07de00be, 0x07de4080, 0x07de80be, 0x07dec080, 0x07df00be, 0x07df4080, 0x07e00820,
    0x07e40820, 0x07e80820, 0x07ec05be, 0x07eec080, 0x07ef00be, 0x07ef4097, 0x07ef8080, 0x07efc117,
    0x07f0443e, 0x07f24080, 0x07f280be, 0x07f2c080, 0x07f303be, 0x07f4c080, 0x07f582ae, 0x07f6c080,
    0x07f7433e, 0x07f8c080, 0x07f903ae, 0x07fac080, 0x07fb013e, 0x07fb8102, 0x07fc83be, 0x07fe4080,
    0x07fe80be, 0x07fec080, 0x07ff00be, 0x07ff4080, 0x07ff8097, 0x0800011e, 0x08008495, 0x08044081,
    0x0805c097, 0x08090081, 0x08094097, 0x08098099, 0x080bc081, 0x080cc085, 0x080d00b1, 0x080d8085,
    0x080dc0b1, 0x080f0197, 0x0811c197, 0x0815c0b3, 0x0817c081, 0x081c0595, 0x081ec081, 0x081f0215,
    0x0820051f, 0x08228583, 0x08254415, 0x082a0097, 0x08400119, 0x08408081, 0x0840c0bf, 0x08414119,
    0x0841c081, 0x084240bf, 0x0842852d, 0x08454081, 0x08458097, 0x08464295, 0x08480097, 0x08484099,
    0x08488097, 0x08490081, 0x08498080, 0x084a0081, 0x084a8102, 0x084b0495, 0x084d421f, 0x084e4081,
    0x084ec099, 0x084f0283, 0x08514295, 0x08540119, 0x0854809b, 0x0854c619, 0x0857c097, 0x08580081,
    0x08584097, 0x08588099, 0x0858c097, 0x08590081, 0x08594097, 0x08598099, 0x0859c09b, 0x085a0097,
    0x085a4081, 0x085a8097, 0x085ac099, 0x085b0295, 0x085c4097, 0x085c8099, 0x085cc097, 0x085d0081,
    0x085d4097, 0x085d8099, 0x085dc09b, 0x085e0097, 0x085e4081, 0x085e8097, 0x085ec099, 0x085f0215,
    0x08624099, 0x0866813e, 0x086b80be, 0x087341be, 0x088100be, 0x088240be, 0x088300be, 0x088901be,
    0x088b0085, 0x088b40b1, 0x088bc085, 0x088c00b1, 0x089040be, 0x089100be, 0x0891c1be, 0x089801be,
    0x089b42be, 0x089d0144, 0x089e0144, 0x08a00144, 0x08a10144, 0x08a20144, 0x08ab023e, 0x08b80244,
    0x08ba8220, 0x08ca411e, 0x0918049f, 0x091a4523, 0x091cc097, 0x091d04a5, 0x091f452b, 0x0921c09b,
    0x092204a1, 0x09244525, 0x0926c099, 0x09270d25, 0x092d8d1f, 0x09340d1f, 0x093a8081, 0x0a8300b3,
    0x0a9d0099, 0x0a9d4097, 0x0a9d8099, 0x0ab700be, 0x0b1f0115, 0x0b5bc081, 0x0ba7c081, 0x0bbcc081,
    0x0bc004ad, 0x0bc244ad, 0x0bc484ad, 0x0bc6f383, 0x0be0852d, 0x0be31d03, 0x0bf1882d, 0x0c000081,
    0x0c0d8283, 0x0c130b84, 0x0c194284, 0x0c1c0122, 0x0c1cc122, 0x0c1d8122, 0x0c1e4122, 0x0c1f0122,
    0x0c250084, 0x0c26c123, 0x0c278084, 0x0c27c085, 0x0c2b0b84, 0x0c314284, 0x0c340122, 0x0c34c122,
    0x0c358122, 0x0c364122, 0x0c370122, 0x0c3d0084, 0x0c3dc220, 0x0c3f8084, 0x0c3fc085, 0x0c4c4a2d,
    0x0c51451f, 0x0c53ca9f, 0x0c5915ad, 0x0c648703, 0x0c800741, 0x0c838089, 0x0c83c129, 0x0c8441a9,
    0x0c850089, 0x0c854129, 0x0c85c2a9, 0x0c870089, 0x0c87408f, 0x0c87808d, 0x0c881241, 0x0c910203,
    0x0c940099, 0x0c9444a3, 0x0c968323, 0x0c98072d, 0x0c9b84af, 0x0c9dc2a1, 0x0c9f00b5, 0x0c9f40b3,
    0x0c9f8085, 0x0ca01883, 0x0cac4223, 0x0cad4523, 0x0cafc097, 0x0cb004a1, 0x0cb241a5, 0x0cb30097,
    0x0cb34099, 0x0cb38097, 0x0cb3c099, 0x0cb417ad, 0x0cbfc085, 0x0cc001b3, 0x0cc0c0b1, 0x0cc100b3,
    0x0cc14131, 0x0cc1c0b5, 0x0cc200b3, 0x0cc241b1, 0x0cc30133, 0x0cc38131, 0x0cc40085, 0x0cc440b1,
    0x0cc48133, 0x0cc50085, 0x0cc540b5, 0x0cc580b7, 0x0cc5c0b5, 0x0cc600b1, 0x0cc64135, 0x0cc6c0b3,
    0x0cc701b1, 0x0cc7c0b3, 0x0cc800b5, 0x0cc840b3, 0x0cc881b1, 0x0cc9422f, 0x0cca4131, 0x0ccac0b5,
    0x0ccb00b1, 0x0ccb40b3, 0x0ccb80b5, 0x0ccbc0b1, 0x0ccc012f, 0x0ccc80b5, 0x0cccc0b3, 0x0ccd00b5,
    0x0ccd40b1, 0x0ccd80b5, 0x0ccdc085, 0x0cce02b1, 0x0ccf40b3, 0x0ccf80b1, 0x0ccfc085, 0x0cd001b1,
    0x0cd0c0b3, 0x0cd101b1, 0x0cd1c0b5, 0x0cd200b3, 0x0cd24085, 0x0cd280b5, 0x0cd2c085, 0x0cd30133,
    0x0cd381b1, 0x0cd440b3, 0x0cd48085, 0x0cd4c0b1, 0x0cd500b3, 0x0cd54085, 0x0cd580b5, 0x0cd5c0b1,
    0x0cd60521, 0x0cd88525, 0x0cdb02a5, 0x0cdc4099, 0x0cdc8117, 0x0cdd0099, 0x0cdd4197, 0x0cde0127,
    0x0cde8285, 0x0cdfc089, 0x0ce0043f, 0x0ce20099, 0x0ce2409b, 0x0ce283bf, 0x0ce44219, 0x0ce54205,
    0x0ce6433f, 0x0ce7c131, 0x0ce84085, 0x0ce881b1, 0x0ce94085, 0x0ce98107, 0x0cea0089, 0x0cea4097,
    0x0cea8219, 0x0ceb809d, 0x0cebc08d, 0x0cec083f, 0x0cf00105, 0x0cf0809b, 0x0cf0c197, 0x0cf1809b,
    0x0cf1c099, 0x0cf20517, 0x0cf48099, 0x0cf4c117, 0x0cf54119, 0x0cf5c097, 0x0cf6009b, 0x0cf64099,
    0x0cf68217, 0x0cf78119, 0x0cf804a1, 0x0cfa4525, 0x0cfcc525, 0x0cff4125, 0x0cffc099, 0x29a70103,
    0x29dc0081, 0x29fc8195, 0x29fe0103, 0x2ad70203, 0x2ada4081, 0x3e401482, 0x3e4a7f82, 0x3e6a3f82,
    0x3e8aa102, 0x3e9b0110, 0x3e9c2f82, 0x3eb3c590, 0x3ec00197, 0x3ec0c119, 0x3ec1413f, 0x3ec4c2af,
    0x3ec74184, 0x3ec804ad, 0x3eca4081, 0x3eca8304, 0x3ecc03a0, 0x3ece02a0, 0x3ecf8084, 0x3ed00120,
    0x3ed0c120, 0x3ed184ae, 0x3ed3c085, 0x3ed4312d, 0x3ef4cbad, 0x3efa892f, 0x3eff022d, 0x3f002f2f,
    0x3f1782a5, 0x3f18c0b1, 0x3f1907af, 0x3f1cffaf, 0x3f3c81a5, 0x3f3d64af, 0x3f542031, 0x3f649b31,
    0x3f7c0131, 0x3f7c83b3, 0x3f7e40b1, 0x3f7e80bd, 0x3f7ec0bb, 0x3f7f00b3, 0x3f840503, 0x3f8c01ad,
    0x3f8cc315, 0x3f8e462d, 0x3f91cc03, 0x3f97c695, 0x3f9c01af, 0x3f9d0085, 0x3f9d852f, 0x3fa03aad,
    0x3fbd442f, 0x3fc06f1f, 0x3fd7c11f, 0x3fd85fad, 0x3fe80081, 0x3fe84f1f, 0x3ff0831f, 0x3ff2831f,
    0x3ff4831f, 0x3ff6819f, 0x3ff80783, 0x41e04d83, 0x41e70f91, 0x44268192, 0x442ac092, 0x444b8112,
    0x44d2c112, 0x452ec212, 0x456e8112, 0x464e0092, 0x74578392, 0x746ec312, 0x75000d1f, 0x75068d1f,
    0x750d0d1f, 0x7513839f, 0x7515891f, 0x751a0d1f, 0x75208d1f, 0x75271015, 0x752f439f, 0x7531459f,
    0x75340d1f, 0x753a8d1f, 0x75410395, 0x7543441f, 0x7545839f, 0x75478d1f, 0x754e0795, 0x7552839f,
    0x75548d1f, 0x755b0d1f, 0x75618d1f, 0x75680d1f, 0x756e8d1f, 0x75750d1f, 0x757b8d1f, 0x75820d1f,
    0x75888d1f, 0x758f0d1f, 0x75958d1f, 0x759c0d1f, 0x75a28d1f, 0x75a90103, 0x75aa089f, 0x75ae4081,
    0x75ae839f, 0x75b04081, 0x75b08c9f, 0x75b6c081, 0x75b7032d, 0x75b8889f, 0x75bcc081, 0x75bd039f,
    0x75bec081, 0x75bf0c9f, 0x75c54081, 0x75c5832d, 0x75c7089f, 0x75cb4081, 0x75cb839f, 0x75cd4081,
    0x75cd8c9f, 0x75d3c081, 0x75d4032d, 0x75d5889f, 0x75d9c081, 0x75da039f, 0x75dbc081, 0x75dc0c9f,
    0x75e24081, 0x75e2832d, 0x75e4089f, 0x75e84081, 0x75e8839f, 0x75ea4081, 0x75ea8c9f, 0x75f0c081,
    0x75f1042d, 0x75f3851f, 0x75f6051f, 0x75f8851f, 0x75fb051f, 0x75fd851f, 0x7b80022d, 0x7b814dad,
    0x7b884203, 0x7b89c081, 0x7b8a452d, 0x7b8d0403, 0x7b908081, 0x7b91dc03, 0x7ba0052d, 0x7ba2c8ad,
    0x7ba84483, 0x7baac8ad, 0x7c400097, 0x7c404521, 0x7c440d25, 0x7c4a8087, 0x7c4ac115, 0x7c4b4117,
    0x7c4c0d1f, 0x7c528217, 0x7c538099, 0x7c53c097, 0x7c5a8197, 0x7c640097, 0x7c80012f, 0x7c808081,
    0x7c841603, 0x7c9004c1, 0x7c940103, 0x7efc051f, 0xbe0001ac, 0xbe00d110, 0xbe0947ac, 0xbe0d3910,
    0xbe29872c, 0xbe2d022c, 0xbe2e3790, 0xbe49ff90, 0xbe69bc10,
};

static const uint16_t unicode_decomp_table2[693] = {
    0x0020, 0x0000, 0x0061, 0x0002, 0x0004, 0x0006, 0x03bc, 0x0008, 0x000a, 0x000c, 0x0015, 0x0095, 0x00a5, 0x00b9, 0x00c1, 0x00c3,
    0x00c7, 0x00cb, 0x00d1, 0x00d7, 0x00dd, 0x00e0, 0x00e6, 0x00f8, 0x0108, 0x010a, 0x0073, 0x0110, 0x0112, 0x0114, 0x0120, 0x012c,
    0x0144, 0x014d, 0x0153, 0x0162, 0x0168, 0x016a, 0x0176, 0x0192, 0x0194, 0x01a9, 0x01bb, 0x01c7, 0x01d1, 0x01d5, 0x02b9, 0x01d7,
    0x003b, 0x01d9, 0x01db, 0x00b7, 0x01e1, 0x01fc, 0x020c, 0x0218, 0x021d, 0x0223, 0x0227, 0x03a3, 0x0233, 0x023f, 0x0242, 0x024b,
    0x024e, 0x0251, 0x025d, 0x0260, 0x0269, 0x026c, 0x026f, 0x0275, 0x0278, 0x0281, 0x028a, 0x029c, 0x029f, 0x02a3, 0x02af, 0x02b9,
    0x02c5, 0x02c9, 0x02cd, 0x02d1, 0x02d5, 0x02e7, 0x02ed, 0x02f1, 0x02f5, 0x02f9, 0x02fd, 0x0305, 0x0309, 0x030d, 0x0313, 0x0317,
    0x031b, 0x0323, 0x0327, 0x032b, 0x032f, 0x0335, 0x033d, 0x0341, 0x0349, 0x034d, 0x0351, 0x0f0b, 0x0357, 0x035b, 0x035f, 0x0363,
    0x0367, 0x036b, 0x036f, 0x0373, 0x0379, 0x037d, 0x0381, 0x0385, 0x0389, 0x038d, 0x0391, 0x0395, 0x0399, 0x039d, 0x03a1, 0x10dc,
    0x03a5, 0x03c9, 0x03cd, 0x03d9, 0x03dd, 0x03e1, 0x03ef, 0x03f1, 0x043d, 0x044f, 0x0499, 0x04f0, 0x0502, 0x054a, 0x0564, 0x056c,
    0x0570, 0x0573, 0x059a, 0x05fa, 0x05fe, 0x0607, 0x060b, 0x0614, 0x0618, 0x061e, 0x0622, 0x0628, 0x068e, 0x0694, 0x0698, 0x069e,
    0x06a2, 0x06ab, 0x03ac, 0x06f3, 0x03ad, 0x06f6, 0x03ae, 0x06f9, 0x03af, 0x06fc, 0x03cc, 0x06ff, 0x03cd, 0x0702, 0x03ce, 0x0705,
    0x0709, 0x070d, 0x0711, 0x0386, 0x0732, 0x0735, 0x03b9, 0x0737, 0x073b, 0x0388, 0x0753, 0x0389, 0x0756, 0x0390, 0x076b, 0x038a,
    0x0777, 0x03b0, 0x0789, 0x038e, 0x0799, 0x079f, 0x07a3, 0x038c, 0x07b8, 0x038f, 0x07bb, 0x00b4, 0x07be, 0x07c0, 0x07c2, 0x2010,
    0x07cb, 0x002e, 0x07cd, 0x07cf, 0x0020, 0x07d2, 0x07d6, 0x07db, 0x07df, 0x07e4, 0x07ea, 0x07f0, 0x0020, 0x07f6, 0x2212, 0x0801,
    0x0805, 0x0807, 0x081d, 0x0825, 0x0827, 0x0043, 0x082d, 0x0830, 0x0190, 0x0836, 0x0839, 0x004e, 0x0845, 0x0847, 0x084c, 0x084e,
    0x0851, 0x005a, 0x03a9, 0x005a, 0x0853, 0x0857, 0x0860, 0x0069, 0x0862, 0x0865, 0x086f, 0x0874, 0x087a, 0x087e, 0x08a2, 0x0049,
    0x08a4, 0x08a6, 0x08a9, 0x0056, 0x08ab, 0x08ad, 0x08b0, 0x08b4, 0x0058, 0x08b6, 0x08b8, 0x08bb, 0x08c0, 0x08c2, 0x08c5, 0x0076,
    0x08c7, 0x08c9, 0x08cc, 0x08d0, 0x0078, 0x08d2, 0x08d4, 0x08d7, 0x08db, 0x08de, 0x08e4, 0x08e7, 0x08f0, 0x08f3, 0x08f6, 0x08f9,
    0x0902, 0x0906, 0x090b, 0x090f, 0x0914, 0x0917, 0x091a, 0x0923, 0x092c, 0x093b, 0x093e, 0x0941, 0x0944, 0x0947, 0x094a, 0x0956,
    0x095c, 0x0960, 0x0962, 0x0964, 0x0968, 0x096a, 0x0970, 0x0978, 0x097c, 0x0980, 0x0986, 0x0989, 0x098f, 0x0991, 0x0030, 0x0993,
    0x0999, 0x099c, 0x099e, 0x09a1, 0x09a4, 0x2d61, 0x6bcd, 0x9f9f, 0x09a6, 0x09b1, 0x09bc, 0x09c7, 0x0a95, 0x0aa1, 0x0b15, 0x0020,
    0x0b27, 0x0b31, 0x0b8d, 0x0ba1, 0x0ba5, 0x0ba9, 0x0bad, 0x0bb1, 0x0bb5, 0x0bb9, 0x0bbd, 0x0bc1, 0x0bc5, 0x0c21, 0x0c35, 0x0c39,
    0x0c3d, 0x0c41, 0x0c45, 0x0c49, 0x0c4d, 0x0c51, 0x0c55, 0x0c59, 0x0c6f, 0x0c71, 0x0c73, 0x0ca0, 0x0cbc, 0x0cdc, 0x0ce4, 0x0cec,
    0x0cf4, 0x0cfc, 0x0d04, 0x0d0c, 0x0d14, 0x0d22, 0x0d2e, 0x0d7a, 0x0d82, 0x0d85, 0x0d89, 0x0d8d, 0x0d9d, 0x0db1, 0x0db5, 0x0dbc,
    0x0dc2, 0x0dc6, 0x0e28, 0x0e2c, 0x0e30, 0x0e32, 0x0e36, 0x0e3c, 0x0e3e, 0x0e41, 0x0e43, 0x0e46, 0x0e77, 0x0e7b, 0x0e89, 0x0e8e,
    0x0e94, 0x0e9c, 0x0ea3, 0x0ea9, 0x0eb4, 0x0ebe, 0x0ec6, 0x0eca, 0x0ecf, 0x0ed9, 0x0edd, 0x0ee4, 0x0eec, 0x0ef3, 0x0ef8, 0x0f04,
    0x0f0a, 0x0f15, 0x0f1b, 0x0f22, 0x0f28, 0x0f33, 0x0f3d, 0x0f45, 0x0f4c, 0x0f51, 0x0f57, 0x0f5e, 0x0f63, 0x0f69, 0x0f70, 0x0f76,
    0x0f7d, 0x0f82, 0x0f89, 0x0f8d, 0x0f9e, 0x0fa4, 0x0fa9, 0x0fad, 0x0fb8, 0x0fbe, 0x0fc9, 0x0fd0, 0x0fd6, 0x0fda, 0x0fe1, 0x0fe5,
    0x0fef, 0x0ffa, 0x1000, 0x1004, 0x1009, 0x100f, 0x1013, 0x101a, 0x101f, 0x1023, 0x1029, 0x102f, 0x1032, 0x1036, 0x1039, 0x103f,
    0x1045, 0x1059, 0x1061, 0x1079, 0x107c, 0x1080, 0x1095, 0x10a1, 0x10b1, 0x10c3, 0x10cb, 0x10cf, 0x10da, 0x10de, 0x10ea, 0x10f2,
    0x10f4, 0x1100, 0x1105, 0x1111, 0x1141, 0x1149, 0x114d, 0x1153, 0x1157, 0x115a, 0x116e, 0x1171, 0x1175, 0x117b, 0x117d, 0x1181,
    0x1184, 0x118c, 0x1192, 0x1196, 0x119c, 0x11a2, 0x11a8, 0x11ab, 0xa76f, 0x11af, 0x11b2, 0x11b6, 0x028d, 0x11be, 0x1210, 0x130e,
    0x140c, 0x1490, 0x1495, 0x1553, 0x156c, 0x1572, 0x1578, 0x157e, 0x158a, 0x1596, 0x002b, 0x15a1, 0x15b9, 0x15bd, 0x15c1, 0x15c5,
    0x15c9, 0x15cd, 0x15e1, 0x15e5, 0x1649, 0x1662, 0x1688, 0x168e, 0x174c, 0x1752, 0x1757, 0x1777, 0x1877, 0x187d, 0x1911, 0x19d3,
    0x1a77, 0x1a7f, 0x1a9d, 0x1aa2, 0x1ab6, 0x1ac0, 0x1ac6, 0x1ada, 0x1adf, 0x1ae5, 0x1af3, 0x1b23, 0x1b30, 0x1b38, 0x1b3c, 0x1b52,
    0x1bc9, 0x1bdb, 0x1bdd, 0x1bdf, 0x3164, 0x1c20, 0x1c22, 0x1c24, 0x1c26, 0x1c28, 0x1c2a, 0x1c48, 0x1c7e, 0x1cc4, 0x1cd2, 0x1cd7,
    0x1ce0, 0x1ce9, 0x1cfb, 0x1d04, 0x1d09, 0x1d29, 0x1d44, 0x1d46, 0x1d48, 0x1d4a, 0x1d4c, 0x1d4e, 0x1d50, 0x1d52, 0x1d72, 0x1d74,
    0x1d76, 0x1d78, 0x1d7a, 0x1d81, 0x1d83, 0x1d85, 0x1d87, 0x1d96, 0x1d98, 0x1d9a, 0x1d9c, 0x1d9e, 0x1da0, 0x1da2, 0x1da4, 0x1da6,
    0x1da8, 0x1daa, 0x1dac, 0x1dae, 0x1db0, 0x1db2, 0x1db6, 0x03f4, 0x1db8, 0x2207, 0x1dba, 0x2202, 0x1dbc, 0x1dc4, 0x03f4, 0x1dc6,
    0x2207, 0x1dc8, 0x2202, 0x1dca, 0x1dd2, 0x03f4, 0x1dd4, 0x2207, 0x1dd6, 0x2202, 0x1dd8, 0x1de0, 0x03f4, 0x1de2, 0x2207, 0x1de4,
    0x2202, 0x1de6, 0x1dee, 0x03f4, 0x1df0, 0x2207, 0x1df2, 0x2202, 0x1df4, 0x1dfe, 0x1e00, 0x1e02, 0x1e04, 0x1e06, 0x1e08, 0x1e0e,
    0x1e2b, 0x062d, 0x1e33, 0x1e3f, 0x062c, 0x1e4f, 0x1ebf, 0x1ecb, 0x1ede, 0x1ef0, 0x1f03, 0x1f05, 0x1f09, 0x1f0f, 0x1f15, 0x1f17,
    0x1f1b, 0x1f1d, 0x1f25, 0x1f28, 0x1f2a, 0x1f30, 0x1f32, 0x30b5, 0x1f38, 0x1f90, 0x1fa6, 0x1faa, 0x1fac, 0x1fb1, 0x1ffe, 0x200f,
    0x2110, 0x2120, 0x2126, 0x2220, 0x233e,
};

static const uint8_t unicode_decomp_data[9292] = {
    0x20, 0x88, 0x20, 0x84, 0x32, 0x33, 0x20, 0x81,    0x20, 0xa7, 0x31, 0x6f, 0x31, 0xd0, 0x34, 0x31,
    0xd0, 0x32, 0x33, 0xd0, 0x34, 0x41, 0x80, 0x41,    0x81, 0x41, 0x82, 0x41, 0x83, 0x41, 0x88, 0x41,
    0x8a, 0x00, 0x00, 0x43, 0xa7, 0x45, 0x80, 0x45,    0x81, 0x45, 0x82, 0x45, 0x88, 0x49, 0x80, 0x49,
    0x81, 0x49, 0x82, 0x49, 0x88, 0x00, 0x00, 0x4e,    0x83, 0x4f, 0x80, 0x4f, 0x81, 0x4f, 0x82, 0x4f,
    0x83, 0x4f, 0x88, 0x00, 0x00, 0x00, 0x00, 0x55,    0x80, 0x55, 0x81, 0x55, 0x82, 0x55, 0x88, 0x59,
    0x81, 0x00, 0x00, 0x00, 0x00, 0x61, 0x80, 0x61,    0x81, 0x61, 0x82, 0x61, 0x83, 0x61, 0x88, 0x61,
    0x8a, 0x00, 0x00, 0x63, 0xa7, 0x65, 0x80, 0x65,    0x81, 0x65, 0x82, 0x65, 0x88, 0x69, 0x80, 0x69,
    0x81, 0x69, 0x82, 0x69, 0x88, 0x00, 0x00, 0x6e,    0x83, 0x6f, 0x80, 0x6f, 0x81, 0x6f, 0x82, 0x6f,
    0x83, 0x6f, 0x88, 0x00, 0x00, 0x00, 0x00, 0x75,    0x80, 0x75, 0x81, 0x75, 0x82, 0x75, 0x88, 0x79,
    0x81, 0x00, 0x00, 0x79, 0x88, 0x41, 0x84, 0x41,    0x86, 0x41, 0xa8, 0x43, 0x81, 0x43, 0x82, 0x43,
    0x87, 0x43, 0x8c, 0x44, 0x8c, 0x45, 0x84, 0x45,    0x86, 0x45, 0x87, 0x45, 0xa8, 0x45, 0x8c, 0x47,
    0x82, 0x47, 0x86, 0x47, 0x87, 0x47, 0xa7, 0x48,    0x82, 0x49, 0x83, 0x49, 0x84, 0x49, 0x86, 0x49,
    0xa8, 0x49, 0x87, 0x49, 0x4a, 0x69, 0x6a, 0x4a,    0x82, 0x4b, 0xa7, 0x4c, 0x81, 0x4c, 0xa7, 0x4c,
    0x8c, 0x4c, 0x00, 0x00, 0x6b, 0x20, 0x6b, 0x4e,    0x81, 0x4e, 0xa7, 0x4e, 0x8c, 0xbc, 0x02, 0x6e,
    0x4f, 0x84, 0x4f, 0x86, 0x4f, 0x8b, 0x52, 0x81,    0x52, 0xa7, 0x52, 0x8c, 0x53, 0x81, 0x53, 0x82,
    0x53, 0xa7, 0x53, 0x8c, 0x54, 0xa7, 0x54, 0x8c,    0x55, 0x83, 0x55, 0x84, 0x55, 0x86, 0x55, 0x8a,
    0x55, 0x8b, 0x55, 0xa8, 0x57, 0x82, 0x59, 0x82,    0x59, 0x88, 0x5a, 0x81, 0x5a, 0x87, 0x5a, 0x8c,
    0x4f, 0x9b, 0x55, 0x9b, 0x44, 0x00, 0x7d, 0x01,    0x44, 0x00, 0x7e, 0x01, 0x64, 0x00, 0x7e, 0x01,
    0x4c, 0x4a, 0x4c, 0x6a, 0x6c, 0x6a, 0x4e, 0x4a,    0x4e, 0x6a, 0x6e, 0x6a, 0x41, 0x00, 0x8c, 0x49,
    0x00, 0x8c, 0x4f, 0x00, 0x8c, 0x55, 0x00, 0x8c,    0xdc, 0x00, 0x84, 0xdc, 0x00, 0x81, 0xdc, 0x00,
    0x8c, 0xdc, 0x00, 0x80, 0xc4, 0x00, 0x84, 0x26,    0x02, 0x84, 0xc6, 0x00, 0x84, 0x47, 0x8c, 0x4b,
    0x8c, 0x4f, 0xa8, 0xea, 0x01, 0x84, 0xeb, 0x01,    0x84, 0xb7, 0x01, 0x8c, 0x92, 0x02, 0x8c, 0x6a,
    0x00, 0x8c, 0x44, 0x5a, 0x44, 0x7a, 0x64, 0x7a,    0x47, 0x81, 0x4e, 0x00, 0x80, 0xc5, 0x00, 0x81,
    0xc6, 0x00, 0x81, 0xd8, 0x00, 0x81, 0x41, 0x8f,    0x41, 0x91, 0x45, 0x8f, 0x45, 0x91, 0x49, 0x8f,
    0x49, 0x91, 0x4f, 0x8f, 0x4f, 0x91, 0x52, 0x8f,    0x52, 0x91, 0x55, 0x8f, 0x55, 0x91, 0x53, 0xa6,
    0x54, 0xa6, 0x48, 0x8c, 0x41, 0x00, 0x87, 0x45,    0x00, 0xa7, 0xd6, 0x00, 0x84, 0xd5, 0x00, 0x84,
    0x4f, 0x00, 0x87, 0x2e, 0x02, 0x84, 0x59, 0x00,    0x84, 0x68, 0x00, 0x66, 0x02, 0x6a, 0x00, 0x72,
    0x00, 0x79, 0x02, 0x7b, 0x02, 0x81, 0x02, 0x77,    0x00, 0x79, 0x00, 0x20, 0x86, 0x20, 0x87, 0x20,
    0x8a, 0x20, 0xa8, 0x20, 0x83, 0x20, 0x8b, 0x63,    0x02, 0x6c, 0x00, 0x73, 0x00, 0x78, 0x00, 0x95,
    0x02, 0x80, 0x81, 0x00, 0x93, 0x88, 0x81, 0x20,    0xc5, 0x20, 0x81, 0xa8, 0x00, 0x81, 0x91, 0x03,
    0x81, 0x95, 0x03, 0x81, 0x97, 0x03, 0x81, 0x99,    0x03, 0x81, 0x00, 0x00, 0x00, 0x9f, 0x03, 0x81,
    0x00, 0x00, 0x00, 0xa5, 0x03, 0x81, 0xa9, 0x03,    0x81, 0xca, 0x03, 0x81, 0x01, 0x03, 0x98, 0x07,
    0xa4, 0x07, 0xb0, 0x00, 0xb4, 0x00, 0xb6, 0x00,    0xb8, 0x00, 0xca, 0x00, 0x01, 0x03, 0xb8, 0x07,
    0xc4, 0x07, 0xbe, 0x00, 0xc4, 0x00, 0xc8, 0x00,    0xa5, 0x03, 0x0d, 0x13, 0x00, 0x01, 0x03, 0xd1,
    0x00, 0xd1, 0x07, 0xc6, 0x03, 0xc0, 0x03, 0xba,    0x03, 0xc1, 0x03, 0xc2, 0x03, 0x00, 0x00, 0x98,
    0x03, 0xb5, 0x03, 0x15, 0x04, 0x80, 0x15, 0x04,    0x88, 0x00, 0x00, 0x00, 0x13, 0x04, 0x81, 0x06,
    0x04, 0x88, 0x1a, 0x04, 0x81, 0x18, 0x04, 0x80,    0x23, 0x04, 0x86, 0x18, 0x04, 0x86, 0x38, 0x04,
    0x86, 0x35, 0x04, 0x80, 0x35, 0x04, 0x88, 0x00,    0x00, 0x00, 0x33, 0x04, 0x81, 0x56, 0x04, 0x88,
    0x3a, 0x04, 0x81, 0x38, 0x04, 0x80, 0x43, 0x04,    0x86, 0x74, 0x04, 0x8f, 0x16, 0x04, 0x86, 0x10,
    0x04, 0x86, 0x10, 0x04, 0x88, 0x15, 0x04, 0x86,    0xd8, 0x04, 0x88, 0x16, 0x04, 0x88, 0x17, 0x04,
    0x88, 0x18, 0x04, 0x84, 0x18, 0x04, 0x88, 0x1e,    0x04, 0x88, 0xe8, 0x04, 0x88, 0x2d, 0x04, 0x88,
    0x23, 0x04, 0x84, 0x23, 0x04, 0x88, 0x23, 0x04,    0x8b, 0x27, 0x04, 0x88, 0x2b, 0x04, 0x88, 0x65,
    0x05, 0x82, 0x05, 0x27, 0x06, 0x00, 0x2c, 0x00,    0x2d, 0x21, 0x2d, 0x00, 0x2e, 0x23, 0x2d, 0x27,
    0x06, 0x00, 0x4d, 0x21, 0x4d, 0xa0, 0x4d, 0x23,    0x4d, 0xd5, 0x06, 0x54, 0x06, 0x00, 0x00, 0x00,
    0x00, 0xc1, 0x06, 0x54, 0x06, 0xd2, 0x06, 0x54,    0x06, 0x28, 0x09, 0x3c, 0x09, 0x30, 0x09, 0x3c,
    0x09, 0x33, 0x09, 0x3c, 0x09, 0x15, 0x09, 0x00,    0x27, 0x01, 0x27, 0x02, 0x27, 0x07, 0x27, 0x0c,
    0x27, 0x0d, 0x27, 0x16, 0x27, 0x1a, 0x27, 0xbe,    0x09, 0x09, 0x00, 0x09, 0x19, 0xa1, 0x09, 0xbc,
    0x09, 0xaf, 0x09, 0xbc, 0x09, 0x32, 0x0a, 0x3c,    0x0a, 0x38, 0x0a, 0x3c, 0x0a, 0x16, 0x0a, 0x00,
    0x26, 0x01, 0x26, 0x06, 0x26, 0x2b, 0x0a, 0x3c,    0x0a, 0x47, 0x0b, 0x56, 0x0b, 0x3e, 0x0b, 0x09,
    0x00, 0x09, 0x19, 0x21, 0x0b, 0x3c, 0x0b, 0x92,    0x0b, 0xd7, 0x0b, 0xbe, 0x0b, 0x08, 0x00, 0x09,
    0x00, 0x08, 0x19, 0x46, 0x0c, 0x56, 0x0c, 0xbf,    0x0c, 0xd5, 0x0c, 0xc6, 0x0c, 0xd5, 0x0c, 0xc2,
    0x0c, 0x04, 0x00, 0x08, 0x13, 0x3e, 0x0d, 0x08,    0x00, 0x09, 0x00, 0x08, 0x19, 0xd9, 0x0d, 0xca,
    0x0d, 0xca, 0x0d, 0x0f, 0x05, 0x12, 0x00, 0x0f,    0x15, 0x4d, 0x0e, 0x32, 0x0e, 0xcd, 0x0e, 0xb2,
    0x0e, 0x99, 0x0e, 0x12, 0x00, 0x12, 0x08, 0x42,    0x0f, 0xb7, 0x0f, 0x4c, 0x0f, 0xb7, 0x0f, 0x51,
    0x0f, 0xb7, 0x0f, 0x56, 0x0f, 0xb7, 0x0f, 0x5b,    0x0f, 0xb7, 0x0f, 0x40, 0x0f, 0xb5, 0x0f, 0x71,
    0x0f, 0x72, 0x0f, 0x71, 0x0f, 0x00, 0x03, 0x41,    0x0f, 0xb2, 0x0f, 0x81, 0x0f, 0xb3, 0x0f, 0x80,
    0x0f, 0xb3, 0x0f, 0x81, 0x0f, 0x71, 0x0f, 0x80,    0x0f, 0x92, 0x0f, 0xb7, 0x0f, 0x9c, 0x0f, 0xb7,
    0x0f, 0xa1, 0x0f, 0xb7, 0x0f, 0xa6, 0x0f, 0xb7,    0x0f, 0xab, 0x0f, 0xb7, 0x0f, 0x90, 0x0f, 0xb5,
    0x0f, 0x25, 0x10, 0x2e, 0x10, 0x05, 0x1b, 0x35,    0x1b, 0x00, 0x00, 0x00, 0x00, 0x07, 0x1b, 0x35,
    0x1b, 0x00, 0x00, 0x00, 0x00, 0x09, 0x1b, 0x35,    0x1b, 0x00, 0x00, 0x00, 0x00, 0x0b, 0x1b, 0x35,
    0x1b, 0x00, 0x00, 0x00, 0x00, 0x0d, 0x1b, 0x35,    0x1b, 0x11, 0x1b, 0x35, 0x1b, 0x3a, 0x1b, 0x35,
    0x1b, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x1b, 0x35,    0x1b, 0x3e, 0x1b, 0x35, 0x1b, 0x42, 0x1b, 0x35,
    0x1b, 0x41, 0x00, 0xc6, 0x00, 0x42, 0x00, 0x00,    0x00, 0x44, 0x00, 0x45, 0x00, 0x8e, 0x01, 0x47,
    0x00, 0x4f, 0x00, 0x22, 0x02, 0x50, 0x00, 0x52,    0x00, 0x54, 0x00, 0x55, 0x00, 0x57, 0x00, 0x61,
    0x00, 0x50, 0x02, 0x51, 0x02, 0x02, 0x1d, 0x62,    0x00, 0x64, 0x00, 0x65, 0x00, 0x59, 0x02, 0x5b,
    0x02, 0x5c, 0x02, 0x67, 0x00, 0x00, 0x00, 0x6b,    0x00, 0x6d, 0x00, 0x4b, 0x01, 0x6f, 0x00, 0x54,
    0x02, 0x16, 0x1d, 0x17, 0x1d, 0x70, 0x00, 0x74,    0x00, 0x75, 0x00, 0x1d, 0x1d, 0x6f, 0x02, 0x76,
    0x00, 0x25, 0x1d, 0xb2, 0x03, 0xb3, 0x03, 0xb4,    0x03, 0xc6, 0x03, 0xc7, 0x03, 0x69, 0x00, 0x72,
    0x00, 0x75, 0x00, 0x76, 0x00, 0xb2, 0x03, 0xb3,    0x03, 0xc1, 0x03, 0xc6, 0x03, 0xc7, 0x03, 0x52,
    0x02, 0x63, 0x00, 0x55, 0x02, 0xf0, 0x00, 0x5c,    0x02, 0x66, 0x00, 0x5f, 0x02, 0x61, 0x02, 0x65,
    0x02, 0x68, 0x02, 0x69, 0x02, 0x6a, 0x02, 0x7b,    0x1d, 0x9d, 0x02, 0x6d, 0x02, 0x85, 0x1d, 0x9f,
    0x02, 0x71, 0x02, 0x70, 0x02, 0x72, 0x02, 0x73,    0x02, 0x74, 0x02, 0x75, 0x02, 0x78, 0x02, 0x82,
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    0x58, 0x8b, 0x57, 0x32, 0x58, 0x31, 0x58, 0xac,    0x58, 0xe4, 0x14, 0xf2, 0x58, 0xf7, 0x58, 0x06,
    0x59, 0x1a, 0x59, 0x22, 0x59, 0x62, 0x59, 0xa8,    0x16, 0xea, 0x16, 0xec, 0x59, 0x1b, 0x5a, 0x27,
    0x5a, 0xd8, 0x59, 0x66, 0x5a, 0xee, 0x36, 0xfc,    0x36, 0x08, 0x5b, 0x3e, 0x5b, 0x3e, 0x5b, 0xc8,
    0x19, 0xc3, 0x5b, 0xd8, 0x5b, 0xe7, 0x5b, 0xf3,    0x5b, 0x18, 0x1b, 0xff, 0x5b, 0x06, 0x5c, 0x53,
    0x5f, 0x22, 0x5c, 0x81, 0x37, 0x60, 0x5c, 0x6e,    0x5c, 0xc0, 0x5c, 0x8d, 0x5c, 0xe4, 0x1d, 0x43,
    0x5d, 0xe6, 0x1d, 0x6e, 0x5d, 0x6b, 0x5d, 0x7c,    0x5d, 0xe1, 0x5d, 0xe2, 0x5d, 0x2f, 0x38, 0xfd,
    0x5d, 0x28, 0x5e, 0x3d, 0x5e, 0x69, 0x5e, 0x62,    0x38, 0x83, 0x21, 0x7c, 0x38, 0xb0, 0x5e, 0xb3,
    0x5e, 0xb6, 0x5e, 0xca, 0x5e, 0x92, 0xa3, 0xfe,    0x5e, 0x31, 0x23, 0x31, 0x23, 0x01, 0x82, 0x22,
    0x5f, 0x22, 0x5f, 0xc7, 0x38, 0xb8, 0x32, 0xda,    0x61, 0x62, 0x5f, 0x6b, 0x5f, 0xe3, 0x38, 0x9a,
    0x5f, 0xcd, 0x5f, 0xd7, 0x5f, 0xf9, 0x5f, 0x81,    0x60, 0x3a, 0x39, 0x1c, 0x39, 0x94, 0x60, 0xd4,
    0x26, 0xc7, 0x60, 0x02, 0x02, 0x00, 0x00, 0x00,    0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x0a, 0x00,
    0x00, 0x02, 0x08, 0x00, 0x80, 0x08, 0x00, 0x00,    0x08, 0x80, 0x28, 0x80, 0x02, 0x00, 0x00, 0x02,
    0x48, 0x61, 0x00, 0x04, 0x06, 0x04, 0x32, 0x46,    0x6a, 0x5c, 0x67, 0x96, 0xaa, 0xae, 0xc8, 0xd3,
    0x5d, 0x62, 0x00, 0x54, 0x77, 0xf3, 0x0c, 0x2b,    0x3d, 0x63, 0xfc, 0x62, 0x68, 0x63, 0x83, 0x63,
    0xe4, 0x63, 0xf1, 0x2b, 0x22, 0x64, 0xc5, 0x63,    0xa9, 0x63, 0x2e, 0x3a, 0x69, 0x64, 0x7e, 0x64,
    0x9d, 0x64, 0x77, 0x64, 0x6c, 0x3a, 0x4f, 0x65,    0x6c, 0x65, 0x0a, 0x30, 0xe3, 0x65, 0xf8, 0x66,
    0x49, 0x66, 0x19, 0x3b, 0x91, 0x66, 0x08, 0x3b,    0xe4, 0x3a, 0x92, 0x51, 0x95, 0x51, 0x00, 0x67,
    0x9c, 0x66, 0xad, 0x80, 0xd9, 0x43, 0x17, 0x67,    0x1b, 0x67, 0x21, 0x67, 0x5e, 0x67, 0x53, 0x67,
    0xc3, 0x33, 0x49, 0x3b, 0xfa, 0x67, 0x85, 0x67,    0x52, 0x68, 0x85, 0x68, 0x6d, 0x34, 0x8e, 0x68,
    0x1f, 0x68, 0x14, 0x69, 0x9d, 0x3b, 0x42, 0x69,    0xa3, 0x69, 0xea, 0x69, 0xa8, 0x6a, 0xa3, 0x36,
    0xdb, 0x6a, 0x18, 0x3c, 0x21, 0x6b, 0xa7, 0x38,    0x54, 0x6b, 0x4e, 0x3c, 0x72, 0x6b, 0x9f, 0x6b,
    0xba, 0x6b, 0xbb, 0x6b, 0x8d, 0x3a, 0x0b, 0x1d,    0xfa, 0x3a, 0x4e, 0x6c, 0xbc, 0x3c, 0xbf, 0x6c,
    0xcd, 0x6c, 0x67, 0x6c, 0x16, 0x6d, 0x3e, 0x6d,    0x77, 0x6d, 0x41, 0x6d, 0x69, 0x6d, 0x78, 0x6d,
    0x85, 0x6d, 0x1e, 0x3d, 0x34, 0x6d, 0x2f, 0x6e,    0x6e, 0x6e, 0x33, 0x3d, 0xcb, 0x6e, 0xc7, 0x6e,
    0xd1, 0x3e, 0xf9, 0x6d, 0x6e, 0x6f, 0x5e, 0x3f,    0x8e, 0x3f, 0xc6, 0x6f, 0x39, 0x70, 0x1e, 0x70,
    0x1b, 0x70, 0x96, 0x3d, 0x4a, 0x70, 0x7d, 0x70,    0x77, 0x70, 0xad, 0x70, 0x25, 0x05, 0x45, 0x71,
    0x63, 0x42, 0x9c, 0x71, 0xab, 0x43, 0x28, 0x72,    0x35, 0x72, 0x50, 0x72, 0x08, 0x46, 0x80, 0x72,
    0x95, 0x72, 0x35, 0x47, 0x02, 0x20, 0x00, 0x00,    0x20, 0x00, 0x00, 0x00, 0x00, 0x08, 0x80, 0x00,
    0x00, 0x02, 0x02, 0x80, 0x8a, 0x00, 0x00, 0x20,    0x00, 0x08, 0x0a, 0x00, 0x80, 0x88, 0x80, 0x20,
    0x14, 0x48, 0x7a, 0x73, 0x8b, 0x73, 0xac, 0x3e,    0xa5, 0x73, 0xb8, 0x3e, 0xb8, 0x3e, 0x47, 0x74,
    0x5c, 0x74, 0x71, 0x74, 0x85, 0x74, 0xca, 0x74,    0x1b, 0x3f, 0x24, 0x75, 0x36, 0x4c, 0x3e, 0x75,
    0x92, 0x4c, 0x70, 0x75, 0x9f, 0x21, 0x10, 0x76,    0xa1, 0x4f, 0xb8, 0x4f, 0x44, 0x50, 0xfc, 0x3f,
    0x08, 0x40, 0xf4, 0x76, 0xf3, 0x50, 0xf2, 0x50,    0x19, 0x51, 0x33, 0x51, 0x1e, 0x77, 0x1f, 0x77,
    0x1f, 0x77, 0x4a, 0x77, 0x39, 0x40, 0x8b, 0x77,    0x46, 0x40, 0x96, 0x40, 0x1d, 0x54, 0x4e, 0x78,
    0x8c, 0x78, 0xcc, 0x78, 0xe3, 0x40, 0x26, 0x56,    0x56, 0x79, 0x9a, 0x56, 0xc5, 0x56, 0x8f, 0x79,
    0xeb, 0x79, 0x2f, 0x41, 0x40, 0x7a, 0x4a, 0x7a,    0x4f, 0x7a, 0x7c, 0x59, 0xa7, 0x5a, 0xa7, 0x5a,
    0xee, 0x7a, 0x02, 0x42, 0xab, 0x5b, 0xc6, 0x7b,    0xc9, 0x7b, 0x27, 0x42, 0x80, 0x5c, 0xd2, 0x7c,
    0xa0, 0x42, 0xe8, 0x7c, 0xe3, 0x7c, 0x00, 0x7d,    0x86, 0x5f, 0x63, 0x7d, 0x01, 0x43, 0xc7, 0x7d,
    0x02, 0x7e, 0x45, 0x7e, 0x34, 0x43, 0x28, 0x62,    0x47, 0x62, 0x59, 0x43, 0xd9, 0x62, 0x7a, 0x7f,
    0x3e, 0x63, 0x95, 0x7f, 0xfa, 0x7f, 0x05, 0x80,    0xda, 0x64, 0x23, 0x65, 0x60, 0x80, 0xa8, 0x65,
    0x70, 0x80, 0x5f, 0x33, 0xd5, 0x43, 0xb2, 0x80,    0x03, 0x81, 0x0b, 0x44, 0x3e, 0x81, 0xb5, 0x5a,
    0xa7, 0x67, 0xb5, 0x67, 0x93, 0x33, 0x9c, 0x33,    0x01, 0x82, 0x04, 0x82, 0x9e, 0x8f, 0x6b, 0x44,
    0x91, 0x82, 0x8b, 0x82, 0x9d, 0x82, 0xb3, 0x52,    0xb1, 0x82, 0xb3, 0x82, 0xbd, 0x82, 0xe6, 0x82,
    0x3c, 0x6b, 0xe5, 0x82, 0x1d, 0x83, 0x63, 0x83,    0xad, 0x83, 0x23, 0x83, 0xbd, 0x83, 0xe7, 0x83,
    0x57, 0x84, 0x53, 0x83, 0xca, 0x83, 0xcc, 0x83,    0xdc, 0x83, 0x36, 0x6c, 0x6b, 0x6d, 0x02, 0x00,
    0x00, 0x20, 0x22, 0x2a, 0xa0, 0x0a, 0x00, 0x20,    0x80, 0x28, 0x00, 0xa8, 0x20, 0x20, 0x00, 0x02,
    0x80, 0x22, 0x02, 0x8a, 0x08, 0x00, 0xaa, 0x00,    0x00, 0x00, 0x02, 0x00, 0x00, 0x28, 0xd5, 0x6c,
    0x2b, 0x45, 0xf1, 0x84, 0xf3, 0x84, 0x16, 0x85,    0xca, 0x73, 0x64, 0x85, 0x2c, 0x6f, 0x5d, 0x45,
    0x61, 0x45, 0xb1, 0x6f, 0xd2, 0x70, 0x6b, 0x45,    0x50, 0x86, 0x5c, 0x86, 0x67, 0x86, 0x69, 0x86,
    0xa9, 0x86, 0x88, 0x86, 0x0e, 0x87, 0xe2, 0x86,    0x79, 0x87, 0x28, 0x87, 0x6b, 0x87, 0x86, 0x87,
    0xd7, 0x45, 0xe1, 0x87, 0x01, 0x88, 0xf9, 0x45,    0x60, 0x88, 0x63, 0x88, 0x67, 0x76, 0xd7, 0x88,
    0xde, 0x88, 0x35, 0x46, 0xfa, 0x88, 0xbb, 0x34,    0xae, 0x78, 0x66, 0x79, 0xbe, 0x46, 0xc7, 0x46,
    0xa0, 0x8a, 0xed, 0x8a, 0x8a, 0x8b, 0x55, 0x8c,    0xa8, 0x7c, 0xab, 0x8c, 0xc1, 0x8c, 0x1b, 0x8d,
    0x77, 0x8d, 0x2f, 0x7f, 0x04, 0x08, 0xcb, 0x8d,    0xbc, 0x8d, 0xf0, 0x8d, 0xde, 0x08, 0xd4, 0x8e,
    0x38, 0x8f, 0xd2, 0x85, 0xed, 0x85, 0x94, 0x90,    0xf1, 0x90, 0x11, 0x91, 0x2e, 0x87, 0x1b, 0x91,
    0x38, 0x92, 0xd7, 0x92, 0xd8, 0x92, 0x7c, 0x92,    0xf9, 0x93, 0x15, 0x94, 0xfa, 0x8b, 0x8b, 0x95,
    0x95, 0x49, 0xb7, 0x95, 0x77, 0x8d, 0xe6, 0x49,    0xc3, 0x96, 0xb2, 0x5d, 0x23, 0x97, 0x45, 0x91,
    0x1a, 0x92, 0x6e, 0x4a, 0x76, 0x4a, 0xe0, 0x97,    0x0a, 0x94, 0xb2, 0x4a, 0x96, 0x94, 0x0b, 0x98,
    0x0b, 0x98, 0x29, 0x98, 0xb6, 0x95, 0xe2, 0x98,    0x33, 0x4b, 0x29, 0x99, 0xa7, 0x99, 0xc2, 0x99,
    0xfe, 0x99, 0xce, 0x4b, 0x30, 0x9b, 0x12, 0x9b,    0x40, 0x9c, 0xfd, 0x9c, 0xce, 0x4c, 0xed, 0x4c,
    0x67, 0x9d, 0xce, 0xa0, 0xf8, 0x4c, 0x05, 0xa1,    0x0e, 0xa2, 0x91, 0xa2, 0xbb, 0x9e, 0x56, 0x4d,
    0xf9, 0x9e, 0xfe, 0x9e, 0x05, 0x9f, 0x0f, 0x9f,    0x16, 0x9f, 0x3b, 0x9f, 0x00, 0xa6, 0x02, 0x88,
    0xa0, 0x00, 0x00, 0x00, 0x00, 0x80, 0x00, 0x28,    0x00, 0x08, 0xa0, 0x80, 0xa0, 0x80, 0x00, 0x80,
    0x80, 0x00, 0x0a, 0x88, 0x80, 0x00, 0x80, 0x00,    0x20, 0x2a, 0x00, 0x80,
};

static const uint16_t unicode_comp_table[945] = {
    0x4a01, 0x49c0, 0x4a02, 0x0280, 0x0281, 0x0282, 0x0283, 0x02c0,    0x02c2, 0x0a00, 0x0284, 0x2442, 0x0285, 0x07c0, 0x0980, 0x0982,
    0x2440, 0x2280, 0x02c4, 0x2282, 0x2284, 0x2286, 0x02c6, 0x02c8,    0x02ca, 0x02cc, 0x0287, 0x228a, 0x02ce, 0x228c, 0x2290, 0x2292,
    0x228e, 0x0288, 0x0289, 0x028a, 0x2482, 0x0300, 0x0302, 0x0304,    0x028b, 0x2480, 0x0308, 0x0984, 0x0986, 0x2458, 0x0a02, 0x0306,
    0x2298, 0x229a, 0x229e, 0x0900, 0x030a, 0x22a0, 0x030c, 0x030e,    0x0840, 0x0310, 0x0312, 0x22a2, 0x22a6, 0x09c0, 0x22a4, 0x22a8,
    0x22aa, 0x028c, 0x028d, 0x028e, 0x0340, 0x0342, 0x0344, 0x0380,    0x028f, 0x248e, 0x07c2, 0x0988, 0x098a, 0x2490, 0x0346, 0x22ac,
    0x0400, 0x22b0, 0x0842, 0x22b2, 0x0402, 0x22b4, 0x0440, 0x0444,    0x22b6, 0x0442, 0x22c2, 0x22c0, 0x22c4, 0x22c6, 0x22c8, 0x0940,
    0x04c0, 0x0291, 0x22ca, 0x04c4, 0x22cc, 0x04c2, 0x22d0, 0x22ce,    0x0292, 0x0293, 0x0294, 0x0295, 0x0540, 0x0542, 0x0a08, 0x0296,
    0x2494, 0x0544, 0x07c4, 0x098c, 0x098e, 0x06c0, 0x2492, 0x0844,    0x2308, 0x230a, 0x0580, 0x230c, 0x0584, 0x0990, 0x0992, 0x230e,
    0x0582, 0x2312, 0x0586, 0x0588, 0x2314, 0x058c, 0x2316, 0x0998,    0x058a, 0x231e, 0x0590, 0x2320, 0x099a, 0x058e, 0x2324, 0x2322,
    0x0299, 0x029a, 0x029b, 0x05c0, 0x05c2, 0x05c4, 0x029c, 0x24ac,    0x05c6, 0x05c8, 0x07c6, 0x0994, 0x0996, 0x0700, 0x24aa, 0x2326,
    0x05ca, 0x232a, 0x2328, 0x2340, 0x2342, 0x2344, 0x2346, 0x05cc,    0x234a, 0x2348, 0x234c, 0x234e, 0x2350, 0x24b8, 0x029d, 0x05ce,
    0x24be, 0x0a0c, 0x2352, 0x0600, 0x24bc, 0x24ba, 0x0640, 0x2354,    0x0642, 0x0644, 0x2356, 0x2358, 0x02a0, 0x02a1, 0x02a2, 0x02a3,
    0x02c1, 0x02c3, 0x0a01, 0x02a4, 0x2443, 0x02a5, 0x07c1, 0x0981,    0x0983, 0x2441, 0x2281, 0x02c5, 0x2283, 0x2285, 0x2287, 0x02c7,
    0x02c9, 0x02cb, 0x02cd, 0x02a7, 0x228b, 0x02cf, 0x228d, 0x2291,    0x2293, 0x228f, 0x02a8, 0x02a9, 0x02aa, 0x2483, 0x0301, 0x0303,
    0x0305, 0x02ab, 0x2481, 0x0309, 0x0985, 0x0987, 0x2459, 0x0a03,    0x0307, 0x2299, 0x229b, 0x229f, 0x0901, 0x030b, 0x22a1, 0x030d,
    0x030f, 0x0841, 0x0311, 0x0313, 0x22a3, 0x22a7, 0x09c1, 0x22a5,    0x22a9, 0x22ab, 0x2380, 0x02ac, 0x02ad, 0x02ae, 0x0341, 0x0343,
    0x0345, 0x02af, 0x248f, 0x07c3, 0x0989, 0x098b, 0x2491, 0x0347,    0x22ad, 0x0401, 0x0884, 0x22b1, 0x0843, 0x22b3, 0x0403, 0x22b5,
    0x0441, 0x0445, 0x22b7, 0x0443, 0x22c3, 0x22c1, 0x22c5, 0x22c7,    0x22c9, 0x0941, 0x04c1, 0x02b1, 0x22cb, 0x04c5, 0x22cd, 0x04c3,
    0x22d1, 0x22cf, 0x02b2, 0x02b3, 0x02b4, 0x02b5, 0x0541, 0x0543,    0x0a09, 0x02b6, 0x2495, 0x0545, 0x07c5, 0x098d, 0x098f, 0x06c1,
    0x2493, 0x0845, 0x2309, 0x230b, 0x0581, 0x230d, 0x0585, 0x0991,    0x0993, 0x230f, 0x0583, 0x2313, 0x0587, 0x0589, 0x2315, 0x058d,
    0x2317, 0x0999, 0x058b, 0x231f, 0x2381, 0x0591, 0x2321, 0x099b,    0x058f, 0x2325, 0x2323, 0x02b9, 0x02ba, 0x02bb, 0x05c1, 0x05c3,
    0x05c5, 0x02bc, 0x24ad, 0x05c7, 0x05c9, 0x07c7, 0x0995, 0x0997,    0x0701, 0x24ab, 0x2327, 0x05cb, 0x232b, 0x2329, 0x2341, 0x2343,
    0x2345, 0x2347, 0x05cd, 0x234b, 0x2349, 0x2382, 0x234d, 0x234f,    0x2351, 0x24b9, 0x02bd, 0x05cf, 0x24bf, 0x0a0d, 0x2353, 0x02bf,
    0x24bd, 0x2383, 0x24bb, 0x0641, 0x2355, 0x0643, 0x0645, 0x2357,    0x2359, 0x3101, 0x0c80, 0x2e00, 0x2446, 0x2444, 0x244a, 0x2448,
    0x0800, 0x0942, 0x0944, 0x0804, 0x2288, 0x2486, 0x2484, 0x248a,    0x2488, 0x22ae, 0x2498, 0x2496, 0x249c, 0x249a, 0x2300, 0x0a06,
    0x2302, 0x0a04, 0x0946, 0x07ce, 0x07ca, 0x07c8, 0x07cc, 0x2447,    0x2445, 0x244b, 0x2449, 0x0801, 0x0943, 0x0945, 0x0805, 0x2289,
    0x2487, 0x2485, 0x248b, 0x2489, 0x22af, 0x2499, 0x2497, 0x249d,    0x249b, 0x2301, 0x0a07, 0x2303, 0x0a05, 0x0947, 0x07cf, 0x07cb,
    0x07c9, 0x07cd, 0x2450, 0x244e, 0x2454, 0x2452, 0x2451, 0x244f,    0x2455, 0x2453, 0x2294, 0x2296, 0x2295, 0x2297, 0x2304, 0x2306,
    0x2305, 0x2307, 0x2318, 0x2319, 0x231a, 0x231b, 0x232c, 0x232d,    0x232e, 0x232f, 0x2400, 0x24a2, 0x24a0, 0x24a6, 0x24a4, 0x24a8,
    0x24a3, 0x24a1, 0x24a7, 0x24a5, 0x24a9, 0x24b0, 0x24ae, 0x24b4,    0x24b2, 0x24b6, 0x24b1, 0x24af, 0x24b5, 0x24b3, 0x24b7, 0x0882,
    0x0880, 0x0881, 0x0802, 0x0803, 0x229c, 0x229d, 0x0a0a, 0x0a0b,    0x0883, 0x0b40, 0x2c8a, 0x0c81, 0x2c89, 0x2c88, 0x2540, 0x2541,
    0x2d00, 0x2e07, 0x0d00, 0x2640, 0x2641, 0x2e80, 0x0d01, 0x26c8,    0x26c9, 0x2f00, 0x2f84, 0x0d02, 0x2f83, 0x2f82, 0x0d40, 0x26d8,
    0x26d9, 0x3186, 0x0d04, 0x2740, 0x2741, 0x3100, 0x3086, 0x0d06,    0x3085, 0x3084, 0x0d41, 0x2840, 0x3200, 0x0d07, 0x284f, 0x2850,
    0x3280, 0x2c84, 0x2e03, 0x2857, 0x0d42, 0x2c81, 0x2c80, 0x24c0,    0x24c1, 0x2c86, 0x2c83, 0x28c0, 0x0d43, 0x25c0, 0x25c1, 0x2940,
    0x0d44, 0x26c0, 0x26c1, 0x2e05, 0x2e02, 0x29c0, 0x0d45, 0x2f05,    0x2f04, 0x0d80, 0x26d0, 0x26d1, 0x2f80, 0x2a40, 0x0d82, 0x26e0,
    0x26e1, 0x3080, 0x3081, 0x2ac0, 0x0d83, 0x3004, 0x3003, 0x0d81,    0x27c0, 0x27c1, 0x3082, 0x2b40, 0x0d84, 0x2847, 0x2848, 0x3184,
    0x3181, 0x2f06, 0x0d08, 0x2f81, 0x3005, 0x0d46, 0x3083, 0x3182,    0x0e00, 0x0e01, 0x0f40, 0x1180, 0x1182, 0x0f03, 0x0f00, 0x11c0,
    0x0f01, 0x1140, 0x1202, 0x1204, 0x0f81, 0x1240, 0x0fc0, 0x1242,    0x0f80, 0x1244, 0x1284, 0x0f82, 0x1286, 0x1288, 0x128a, 0x12c0,
    0x1282, 0x1181, 0x1183, 0x1043, 0x1040, 0x11c1, 0x1041, 0x1141,    0x1203, 0x1205, 0x10c1, 0x1241, 0x1000, 0x1243, 0x10c0, 0x1245,
    0x1285, 0x10c2, 0x1287, 0x1289, 0x128b, 0x12c1, 0x1283, 0x1080,    0x1100, 0x1101, 0x1200, 0x1201, 0x1280, 0x1281, 0x1340, 0x1341,
    0x1343, 0x1342, 0x1344, 0x13c2, 0x1400, 0x13c0, 0x1440, 0x1480,    0x14c0, 0x1540, 0x1541, 0x1740, 0x1700, 0x1741, 0x17c0, 0x1800,
    0x1802, 0x1801, 0x1840, 0x1880, 0x1900, 0x18c0, 0x18c1, 0x1901,    0x1940, 0x1942, 0x1941, 0x1980, 0x19c0, 0x19c2, 0x19c1, 0x1c80,
    0x1cc0, 0x1dc0, 0x1f80, 0x2000, 0x2002, 0x2004, 0x2006, 0x2008,    0x2040, 0x2080, 0x2082, 0x20c0, 0x20c1, 0x2100, 0x22b8, 0x22b9,
    0x2310, 0x2311, 0x231c, 0x231d, 0x244c, 0x2456, 0x244d, 0x2457,    0x248c, 0x248d, 0x249e, 0x249f, 0x2500, 0x2502, 0x2504, 0x2bc0,
    0x2501, 0x2503, 0x2505, 0x2bc1, 0x2bc2, 0x2bc3, 0x2bc4, 0x2bc5,    0x2bc6, 0x2bc7, 0x2580, 0x2582, 0x2584, 0x2bc8, 0x2581, 0x2583,
    0x2585, 0x2bc9, 0x2bca, 0x2bcb, 0x2bcc, 0x2bcd, 0x2bce, 0x2bcf,    0x2600, 0x2602, 0x2601, 0x2603, 0x2680, 0x2682, 0x2681, 0x2683,
    0x26c2, 0x26c4, 0x26c6, 0x2c00, 0x26c3, 0x26c5, 0x26c7, 0x2c01,    0x2c02, 0x2c03, 0x2c04, 0x2c05, 0x2c06, 0x2c07, 0x26ca, 0x26cc,
    0x26ce, 0x2c08, 0x26cb, 0x26cd, 0x26cf, 0x2c09, 0x2c0a, 0x2c0b,    0x2c0c, 0x2c0d, 0x2c0e, 0x2c0f, 0x26d2, 0x26d4, 0x26d6, 0x26d3,
    0x26d5, 0x26d7, 0x26da, 0x26dc, 0x26de, 0x26db, 0x26dd, 0x26df,    0x2700, 0x2702, 0x2701, 0x2703, 0x2780, 0x2782, 0x2781, 0x2783,
    0x2800, 0x2802, 0x2804, 0x2801, 0x2803, 0x2805, 0x2842, 0x2844,    0x2846, 0x2849, 0x284b, 0x284d, 0x2c40, 0x284a, 0x284c, 0x284e,
    0x2c41, 0x2c42, 0x2c43, 0x2c44, 0x2c45, 0x2c46, 0x2c47, 0x2851,    0x2853, 0x2855, 0x2c48, 0x2852, 0x2854, 0x2856, 0x2c49, 0x2c4a,
    0x2c4b, 0x2c4c, 0x2c4d, 0x2c4e, 0x2c4f, 0x2c82, 0x2e01, 0x3180,    0x2c87, 0x2f01, 0x2f02, 0x2f03, 0x2e06, 0x3185, 0x3000, 0x3001,
    0x3002, 0x4640, 0x4641, 0x4680, 0x46c0, 0x46c2, 0x46c1, 0x4700,    0x4740, 0x4780, 0x47c0, 0x47c2, 0x4900, 0x4940, 0x4980, 0x4982,
    0x4a00, 0x49c2, 0x4a03, 0x4a04, 0x4a40, 0x4a41, 0x4a80, 0x4a81,    0x4ac0, 0x4ac1, 0x4bc0, 0x4bc1, 0x4b00, 0x4b01, 0x4b40, 0x4b41,
    0x4bc2, 0x4bc3, 0x4b80, 0x4b81, 0x4b82, 0x4b83, 0x4c00, 0x4c01,    0x4c02, 0x4c03, 0x5600, 0x5440, 0x5442, 0x5444, 0x5446, 0x5448,
    0x544a, 0x544c, 0x544e, 0x5450, 0x5452, 0x5454, 0x5456, 0x5480,    0x5482, 0x5484, 0x54c0, 0x54c1, 0x5500, 0x5501, 0x5540, 0x5541,
    0x5580, 0x5581, 0x55c0, 0x55c1, 0x5680, 0x58c0, 0x5700, 0x5702,    0x5704, 0x5706, 0x5708, 0x570a, 0x570c, 0x570e, 0x5710, 0x5712,
    0x5714, 0x5716, 0x5740, 0x5742, 0x5744, 0x5780, 0x5781, 0x57c0,    0x57c1, 0x5800, 0x5801, 0x5840, 0x5841, 0x5880, 0x5881, 0x5900,
    0x5901, 0x5902, 0x5903, 0x5940, 0x8f40, 0x8f42, 0x8f80, 0x8fc0,    0x8fc1, 0x9000, 0x9001, 0x9041, 0x9040, 0x9043, 0x9080, 0x9081,
    0x90c0,
};

typedef enum {
    UNICODE_GC_Cn,
    UNICODE_GC_Lu,
    UNICODE_GC_Ll,
    UNICODE_GC_Lt,
    UNICODE_GC_Lm,
    UNICODE_GC_Lo,
    UNICODE_GC_Mn,
    UNICODE_GC_Mc,
    UNICODE_GC_Me,
    UNICODE_GC_Nd,
    UNICODE_GC_Nl,
    UNICODE_GC_No,
    UNICODE_GC_Sm,
    UNICODE_GC_Sc,
    UNICODE_GC_Sk,
    UNICODE_GC_So,
    UNICODE_GC_Pc,
    UNICODE_GC_Pd,
    UNICODE_GC_Ps,
    UNICODE_GC_Pe,
    UNICODE_GC_Pi,
    UNICODE_GC_Pf,
    UNICODE_GC_Po,
    UNICODE_GC_Zs,
    UNICODE_GC_Zl,
    UNICODE_GC_Zp,
    UNICODE_GC_Cc,
    UNICODE_GC_Cf,
    UNICODE_GC_Cs,
    UNICODE_GC_Co,
    UNICODE_GC_LC,
    UNICODE_GC_L,
    UNICODE_GC_M,
    UNICODE_GC_N,
    UNICODE_GC_S,
    UNICODE_GC_P,
    UNICODE_GC_Z,
    UNICODE_GC_C,
    UNICODE_GC_COUNT,
} UnicodeGCEnum;

static const char unicode_gc_name_table[] =
    "Cn,Unassigned"            "\0"
    "Lu,Uppercase_Letter"      "\0"
    "Ll,Lowercase_Letter"      "\0"
    "Lt,Titlecase_Letter"      "\0"
    "Lm,Modifier_Letter"       "\0"
    "Lo,Other_Letter"          "\0"
    "Mn,Nonspacing_Mark"       "\0"
    "Mc,Spacing_Mark"          "\0"
    "Me,Enclosing_Mark"        "\0"
    "Nd,Decimal_Number,digit"  "\0"
    "Nl,Letter_Number"         "\0"
    "No,Other_Number"          "\0"
    "Sm,Math_Symbol"           "\0"
    "Sc,Currency_Symbol"       "\0"
    "Sk,Modifier_Symbol"       "\0"
    "So,Other_Symbol"          "\0"
    "Pc,Connector_Punctuation" "\0"
    "Pd,Dash_Punctuation"      "\0"
    "Ps,Open_Punctuation"      "\0"
    "Pe,Close_Punctuation"     "\0"
    "Pi,Initial_Punctuation"   "\0"
    "Pf,Final_Punctuation"     "\0"
    "Po,Other_Punctuation"     "\0"
    "Zs,Space_Separator"       "\0"
    "Zl,Line_Separator"        "\0"
    "Zp,Paragraph_Separator"   "\0"
    "Cc,Control,cntrl"         "\0"
    "Cf,Format"                "\0"
    "Cs,Surrogate"             "\0"
    "Co,Private_Use"           "\0"
    "LC,Cased_Letter"          "\0"
    "L,Letter"                 "\0"
    "M,Mark,Combining_Mark"    "\0"
    "N,Number"                 "\0"
    "S,Symbol"                 "\0"
    "P,Punctuation,punct"      "\0"
    "Z,Separator"              "\0"
    "C,Other"                  "\0"
;

static const uint8_t unicode_gc_table[3897] = {
    0xfa, 0x18, 0x17, 0x56, 0x0d, 0x56, 0x12, 0x13,    0x16, 0x0c, 0x16, 0x11, 0x36, 0xe9, 0x02, 0x36,
    0x4c, 0x36, 0xe1, 0x12, 0x12, 0x16, 0x13, 0x0e,    0x10, 0x0e, 0xe2, 0x12, 0x12, 0x0c, 0x13, 0x0c,
    0xfa, 0x19, 0x17, 0x16, 0x6d, 0x0f, 0x16, 0x0e,    0x0f, 0x05, 0x14, 0x0c, 0x1b, 0x0f, 0x0e, 0x0f,
    0x0c, 0x2b, 0x0e, 0x02, 0x36, 0x0e, 0x0b, 0x05,    0x15, 0x4b, 0x16, 0xe1, 0x0f, 0x0c, 0xc1, 0xe2,
    0x10, 0x0c, 0xe2, 0x00, 0xff, 0x30, 0x02, 0xff,    0x08, 0x02, 0xff, 0x27, 0xbf, 0x22, 0x21, 0x02,
    0x5f, 0x5f, 0x21, 0x22, 0x61, 0x02, 0x21, 0x02,    0x41, 0x42, 0x21, 0x02, 0x21, 0x02, 0x9f, 0x7f,
    0x02, 0x5f, 0x5f, 0x21, 0x02, 0x5f, 0x3f, 0x02,    0x05, 0x3f, 0x22, 0x65, 0x01, 0x03, 0x02, 0x01,
    0x03, 0x02, 0x01, 0x03, 0x02, 0xff, 0x08, 0x02,    0xff, 0x0a, 0x02, 0x01, 0x03, 0x02, 0x5f, 0x21,
    0x02, 0xff, 0x32, 0xa2, 0x21, 0x02, 0x21, 0x22,    0x5f, 0x41, 0x02, 0xff, 0x00, 0xe2, 0x3c, 0x05,
    0xe2, 0x13, 0xe4, 0x0a, 0x6e, 0xe4, 0x04, 0xee,    0x06, 0x84, 0xce, 0x04, 0x0e, 0x04, 0xee, 0x09,
    0xe6, 0x68, 0x7f, 0x04, 0x0e, 0x3f, 0x20, 0x04,    0x42, 0x16, 0x01, 0x60, 0x2e, 0x01, 0x16, 0x41,
    0x00, 0x01, 0x00, 0x21, 0x02, 0xe1, 0x09, 0x00,    0xe1, 0x01, 0xe2, 0x1b, 0x3f, 0x02, 0x41, 0x42,
    0xff, 0x10, 0x62, 0x3f, 0x0c, 0x5f, 0x3f, 0x02,    0xe1, 0x2b, 0xe2, 0x28, 0xff, 0x1a, 0x0f, 0x86,
    0x28, 0xff, 0x2f, 0xff, 0x06, 0x02, 0xff, 0x58,    0x00, 0xe1, 0x1e, 0x20, 0x04, 0xb6, 0xe2, 0x21,
    0x16, 0x11, 0x20, 0x2f, 0x0d, 0x00, 0xe6, 0x25,    0x11, 0x06, 0x16, 0x26, 0x16, 0x26, 0x16, 0x06,
    0xe0, 0x00, 0xe5, 0x13, 0x60, 0x65, 0x36, 0xe0,    0x03, 0xbb, 0x4c, 0x36, 0x0d, 0x36, 0x2f, 0xe6,
    0x03, 0x16, 0x1b, 0x56, 0xe5, 0x18, 0x04, 0xe5,    0x02, 0xe6, 0x0d, 0xe9, 0x02, 0x76, 0x25, 0x06,
    0xe5, 0x5b, 0x16, 0x05, 0xc6, 0x1b, 0x0f, 0xa6,    0x24, 0x26, 0x0f, 0x66, 0x25, 0xe9, 0x02, 0x45,
    0x2f, 0x05, 0xf6, 0x06, 0x00, 0x1b, 0x05, 0x06,    0xe5, 0x16, 0xe6, 0x13, 0x20, 0xe5, 0x51, 0xe6,
    0x03, 0x05, 0xe0, 0x06, 0xe9, 0x02, 0xe5, 0x19,    0xe6, 0x01, 0x24, 0x0f, 0x56, 0x04, 0x20, 0x06,
    0x2d, 0xe5, 0x0e, 0x66, 0x04, 0xe6, 0x01, 0x04,    0x46, 0x04, 0x86, 0x20, 0xf6, 0x07, 0x00, 0xe5,
    0x11, 0x46, 0x20, 0x16, 0x00, 0xe5, 0x03, 0x80,    0xe5, 0x10, 0x0e, 0xa5, 0x00, 0x3b, 0xa0, 0xe6,
    0x00, 0xe5, 0x21, 0x04, 0xe6, 0x10, 0x1b, 0xe6,    0x18, 0x07, 0xe5, 0x2e, 0x06, 0x07, 0x06, 0x05,
    0x47, 0xe6, 0x00, 0x67, 0x06, 0x27, 0x05, 0xc6,    0xe5, 0x02, 0x26, 0x36, 0xe9, 0x02, 0x16, 0x04,
    0xe5, 0x07, 0x06, 0x27, 0x00, 0xe5, 0x00, 0x20,    0x25, 0x20, 0xe5, 0x0e, 0x00, 0xc5, 0x00, 0x05,
    0x40, 0x65, 0x20, 0x06, 0x05, 0x47, 0x66, 0x20,    0x27, 0x20, 0x27, 0x06, 0x05, 0xe0, 0x00, 0x07,
    0x60, 0x25, 0x00, 0x45, 0x26, 0x20, 0xe9, 0x02,    0x25, 0x2d, 0xab, 0x0f, 0x0d, 0x05, 0x16, 0x06,
    0x20, 0x26, 0x07, 0x00, 0xa5, 0x60, 0x25, 0x20,    0xe5, 0x0e, 0x00, 0xc5, 0x00, 0x25, 0x00, 0x25,
    0x00, 0x25, 0x20, 0x06, 0x00, 0x47, 0x26, 0x60,    0x26, 0x20, 0x46, 0x40, 0x06, 0xc0, 0x65, 0x00,
    0x05, 0xc0, 0xe9, 0x02, 0x26, 0x45, 0x06, 0x16,    0xe0, 0x02, 0x26, 0x07, 0x00, 0xe5, 0x01, 0x00,
    0x45, 0x00, 0xe5, 0x0e, 0x00, 0xc5, 0x00, 0x25,    0x00, 0x85, 0x20, 0x06, 0x05, 0x47, 0x86, 0x00,
    0x26, 0x07, 0x00, 0x27, 0x06, 0x20, 0x05, 0xe0,    0x07, 0x25, 0x26, 0x20, 0xe9, 0x02, 0x16, 0x0d,
    0xc0, 0x05, 0xa6, 0x00, 0x06, 0x27, 0x00, 0xe5,    0x00, 0x20, 0x25, 0x20, 0xe5, 0x0e, 0x00, 0xc5,
    0x00, 0x25, 0x00, 0x85, 0x20, 0x06, 0x05, 0x07,    0x06, 0x07, 0x66, 0x20, 0x27, 0x20, 0x27, 0x06,
    0xc0, 0x26, 0x07, 0x60, 0x25, 0x00, 0x45, 0x26,    0x20, 0xe9, 0x02, 0x0f, 0x05, 0xab, 0xe0, 0x02,
    0x06, 0x05, 0x00, 0xa5, 0x40, 0x45, 0x00, 0x65,    0x40, 0x25, 0x00, 0x05, 0x00, 0x25, 0x40, 0x25,
    0x40, 0x45, 0x40, 0xe5, 0x04, 0x60, 0x27, 0x06,    0x27, 0x40, 0x47, 0x00, 0x47, 0x06, 0x20, 0x05,
    0xa0, 0x07, 0xe0, 0x06, 0xe9, 0x02, 0x4b, 0xaf,    0x0d, 0x0f, 0x80, 0x06, 0x47, 0x06, 0xe5, 0x00,
    0x00, 0x45, 0x00, 0xe5, 0x0f, 0x00, 0xe5, 0x08,    0x20, 0x06, 0x05, 0x46, 0x67, 0x00, 0x46, 0x00,
    0x66, 0xc0, 0x26, 0x00, 0x45, 0x20, 0x05, 0x20,    0x25, 0x26, 0x20, 0xe9, 0x02, 0xc0, 0x16, 0xcb,
    0x0f, 0x05, 0x06, 0x27, 0x16, 0xe5, 0x00, 0x00,    0x45, 0x00, 0xe5, 0x0f, 0x00, 0xe5, 0x02, 0x00,
    0x85, 0x20, 0x06, 0x05, 0x07, 0x06, 0x87, 0x00,    0x06, 0x27, 0x00, 0x27, 0x26, 0xc0, 0x27, 0xa0,
    0x25, 0x00, 0x25, 0x26, 0x20, 0xe9, 0x02, 0x00,    0x25, 0xe0, 0x05, 0x26, 0x27, 0xe5, 0x01, 0x00,
    0x45, 0x00, 0xe5, 0x21, 0x26, 0x05, 0x47, 0x66,    0x00, 0x47, 0x00, 0x47, 0x06, 0x05, 0x0f, 0x60,
    0x45, 0x07, 0xcb, 0x45, 0x26, 0x20, 0xe9, 0x02,    0xeb, 0x01, 0x0f, 0xa5, 0x00, 0x06, 0x27, 0x00,
    0xe5, 0x0a, 0x40, 0xe5, 0x10, 0x00, 0xe5, 0x01,    0x00, 0x05, 0x20, 0xc5, 0x40, 0x06, 0x60, 0x47,
    0x46, 0x00, 0x06, 0x00, 0xe7, 0x00, 0xa0, 0xe9,    0x02, 0x20, 0x27, 0x16, 0xe0, 0x04, 0xe5, 0x28,
    0x06, 0x25, 0xc6, 0x60, 0x0d, 0xa5, 0x04, 0xe6,    0x00, 0x16, 0xe9, 0x02, 0x36, 0xe0, 0x1d, 0x25,
    0x00, 0x05, 0x00, 0x85, 0x00, 0xe5, 0x10, 0x00,    0x05, 0x00, 0xe5, 0x02, 0x06, 0x25, 0xe6, 0x01,
    0x05, 0x20, 0x85, 0x00, 0x04, 0x00, 0xa6, 0x20,    0xe9, 0x02, 0x20, 0x65, 0xe0, 0x18, 0x05, 0x4f,
    0xf6, 0x07, 0x0f, 0x16, 0x4f, 0x26, 0xaf, 0xe9,    0x02, 0xeb, 0x02, 0x0f, 0x06, 0x0f, 0x06, 0x0f,
    0x06, 0x12, 0x13, 0x12, 0x13, 0x27, 0xe5, 0x00,    0x00, 0xe5, 0x1c, 0x60, 0xe6, 0x06, 0x07, 0x86,
    0x16, 0x26, 0x85, 0xe6, 0x03, 0x00, 0xe6, 0x1c,    0x00, 0xef, 0x00, 0x06, 0xaf, 0x00, 0x2f, 0x96,
    0x6f, 0x36, 0xe0, 0x1d, 0xe5, 0x23, 0x27, 0x66,    0x07, 0xa6, 0x07, 0x26, 0x27, 0x26, 0x05, 0xe9,
    0x02, 0xb6, 0xa5, 0x27, 0x26, 0x65, 0x46, 0x05,    0x47, 0x25, 0xc7, 0x45, 0x66, 0xe5, 0x05, 0x06,
    0x27, 0x26, 0xa7, 0x06, 0x05, 0x07, 0xe9, 0x02,    0x47, 0x06, 0x2f, 0xe1, 0x1e, 0x00, 0x01, 0x80,
    0x01, 0x20, 0xe2, 0x23, 0x16, 0x04, 0x42, 0xe5,    0x80, 0xc1, 0x00, 0x65, 0x20, 0xc5, 0x00, 0x05,
    0x00, 0x65, 0x20, 0xe5, 0x21, 0x00, 0x65, 0x20,    0xe5, 0x19, 0x00, 0x65, 0x20, 0xc5, 0x00, 0x05,
    0x00, 0x65, 0x20, 0xe5, 0x07, 0x00, 0xe5, 0x31,    0x00, 0x65, 0x20, 0xe5, 0x3b, 0x20, 0x46, 0xf6,
    0x01, 0xeb, 0x0c, 0x40, 0xe5, 0x08, 0xef, 0x02,    0xa0, 0xe1, 0x4e, 0x20, 0xa2, 0x20, 0x11, 0xe5,
    0x81, 0xe4, 0x0f, 0x16, 0xe5, 0x09, 0x17, 0xe5,    0x12, 0x12, 0x13, 0x40, 0xe5, 0x43, 0x56, 0x4a,
    0xe5, 0x00, 0xc0, 0xe5, 0x0a, 0x46, 0x07, 0xe0,    0x01, 0xe5, 0x0b, 0x26, 0x07, 0x36, 0xe0, 0x01,
    0xe5, 0x0a, 0x26, 0xe0, 0x04, 0xe5, 0x05, 0x00,    0x45, 0x00, 0x26, 0xe0, 0x04, 0xe5, 0x2c, 0x26,
    0x07, 0xc6, 0xe7, 0x00, 0x06, 0x27, 0xe6, 0x03,    0x56, 0x04, 0x56, 0x0d, 0x05, 0x06, 0x20, 0xe9,
    0x02, 0xa0, 0xeb, 0x02, 0xa0, 0xb6, 0x11, 0x76,    0x46, 0x1b, 0x06, 0xe9, 0x02, 0xa0, 0xe5, 0x1b,
    0x04, 0xe5, 0x2d, 0xc0, 0x85, 0x26, 0xe5, 0x1a,    0x06, 0x05, 0x80, 0xe5, 0x3e, 0xe0, 0x02, 0xe5,
    0x17, 0x00, 0x46, 0x67, 0x26, 0x47, 0x60, 0x27,    0x06, 0xa7, 0x46, 0x60, 0x0f, 0x40, 0x36, 0xe9,
    0x02, 0xe5, 0x16, 0x20, 0x85, 0xe0, 0x03, 0xe5,    0x24, 0x60, 0xe5, 0x12, 0xa0, 0xe9, 0x02, 0x0b,
    0x40, 0xef, 0x1a, 0xe5, 0x0f, 0x26, 0x27, 0x06,    0x20, 0x36, 0xe5, 0x2d, 0x07, 0x06, 0x07, 0xc6,
    0x00, 0x06, 0x07, 0x06, 0x27, 0xe6, 0x00, 0xa7,    0xe6, 0x02, 0x20, 0x06, 0xe9, 0x02, 0xa0, 0xe9,
    0x02, 0xa0, 0xd6, 0x04, 0xb6, 0x20, 0xe6, 0x06,    0x08, 0xe6, 0x08, 0xe0, 0x29, 0x66, 0x07, 0xe5,
    0x27, 0x06, 0x07, 0x86, 0x07, 0x06, 0x87, 0x06,    0x27, 0xe5, 0x00, 0x40, 0xe9, 0x02, 0xd6, 0xef,
    0x02, 0xe6, 0x01, 0xef, 0x01, 0x36, 0x00, 0x26,    0x07, 0xe5, 0x16, 0x07, 0x66, 0x27, 0x26, 0x07,
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    0x10, 0xa7, 0x00, 0x27, 0x20, 0x26, 0x07, 0x06,    0x05, 0x07, 0x05, 0x07, 0x06, 0x56, 0xe0, 0x01,
    0xe9, 0x02, 0xe0, 0x3e, 0xe5, 0x00, 0x20, 0xe5,    0x1f, 0x47, 0x66, 0x20, 0x26, 0x67, 0x06, 0x05,
    0x16, 0x05, 0x07, 0xe0, 0x13, 0x05, 0xe6, 0x02,    0xe5, 0x20, 0xa6, 0x07, 0x05, 0x66, 0xf6, 0x00,
    0x06, 0xe0, 0x00, 0x05, 0xa6, 0x27, 0x46, 0xe5,    0x26, 0xe6, 0x05, 0x07, 0x26, 0x56, 0x05, 0x96,
    0xe0, 0x05, 0xe5, 0x41, 0xe0, 0x80, 0x7f, 0xe5,    0x01, 0x00, 0xe5, 0x1d, 0x07, 0xc6, 0x00, 0xa6,
    0x07, 0x06, 0x05, 0x96, 0xe0, 0x02, 0xe9, 0x02,    0xeb, 0x0b, 0x40, 0x36, 0xe5, 0x16, 0x20, 0xe6,
    0x0e, 0x00, 0x07, 0xc6, 0x07, 0x26, 0x07, 0x26,    0xe0, 0x41, 0xc5, 0x00, 0x25, 0x00, 0xe5, 0x1e,
    0xa6, 0x40, 0x06, 0x00, 0x26, 0x00, 0xc6, 0x05,    0x06, 0xe0, 0x00, 0xe9, 0x02, 0xa0, 0xa5, 0x00,
    0x25, 0x00, 0xe5, 0x18, 0x87, 0x00, 0x26, 0x00,    0x27, 0x06, 0x07, 0x06, 0x05, 0xc0, 0xe9, 0x02,
    0xe0, 0x80, 0xae, 0xe5, 0x0b, 0x26, 0x27, 0x36,    0xe0, 0x80, 0x2f, 0x05, 0xe0, 0x07, 0xeb, 0x0d,
    0xef, 0x00, 0x6d, 0xef, 0x09, 0xe0, 0x05, 0x16,    0xe5, 0x83, 0x12, 0xe0, 0x5e, 0xea, 0x67, 0x00,
    0x96, 0xe0, 0x03, 0xe5, 0x80, 0x3c, 0xe0, 0x89,    0xc4, 0xe5, 0x59, 0x36, 0xe0, 0x05, 0xe5, 0x83,
    0xa7, 0x00, 0xfb, 0x01, 0xe0, 0x8f, 0x3f, 0xe5,    0x81, 0xbf, 0xe0, 0xa1, 0x31, 0xe5, 0x81, 0xb1,
    0xc0, 0xe5, 0x17, 0x00, 0xe9, 0x02, 0x60, 0x36,    0xe5, 0x47, 0x00, 0xe9, 0x02, 0xa0, 0xe5, 0x16,
    0x20, 0x86, 0x16, 0xe0, 0x02, 0xe5, 0x28, 0xc6,    0x96, 0x6f, 0x64, 0x16, 0x0f, 0xe0, 0x02, 0xe9,
    0x02, 0x00, 0xcb, 0x00, 0xe5, 0x0d, 0x80, 0xe5,    0x0b, 0xe0, 0x82, 0x28, 0xe1, 0x18, 0xe2, 0x18,
    0xeb, 0x0f, 0x76, 0xe0, 0x5d, 0xe5, 0x43, 0x60,    0x06, 0x05, 0xe7, 0x2f, 0xc0, 0x66, 0xe4, 0x05,
    0xe0, 0x38, 0x24, 0x16, 0x04, 0x06, 0xe0, 0x03,    0x27, 0xe0, 0x06, 0xe5, 0x97, 0x70, 0xe0, 0x00,
    0xe5, 0x84, 0x4e, 0xe0, 0x22, 0xe5, 0x01, 0xe0,    0xa2, 0x5f, 0x64, 0x00, 0xc4, 0x00, 0x24, 0x00,
    0xe5, 0x80, 0x9b, 0xe0, 0x25, 0x45, 0xe0, 0x09,    0x65, 0xe0, 0x00, 0xe5, 0x81, 0x04, 0xe0, 0x88,
    0x7c, 0xe5, 0x63, 0x80, 0xe5, 0x05, 0x40, 0xe5,    0x01, 0xc0, 0xe5, 0x02, 0x20, 0x0f, 0x26, 0x16,
    0x7b, 0xe0, 0x91, 0xd4, 0xe6, 0x26, 0x20, 0xe6,    0x0f, 0xe0, 0x01, 0xef, 0x6c, 0xe0, 0x34, 0xef,
    0x80, 0x6e, 0xe0, 0x02, 0xef, 0x1f, 0x20, 0xef,    0x34, 0x27, 0x46, 0x4f, 0xa7, 0xfb, 0x00, 0xe6,
    0x00, 0x2f, 0xc6, 0xef, 0x16, 0x66, 0xef, 0x35,    0xe0, 0x0d, 0xef, 0x3a, 0x46, 0x0f, 0xe0, 0x80,
    0x12, 0xeb, 0x0c, 0xe0, 0x04, 0xef, 0x4f, 0xe0,    0x01, 0xeb, 0x11, 0xe0, 0x7f, 0xe1, 0x12, 0xe2,
    0x12, 0xe1, 0x12, 0xc2, 0x00, 0xe2, 0x0a, 0xe1,    0x12, 0xe2, 0x12, 0x01, 0x00, 0x21, 0x20, 0x01,
    0x20, 0x21, 0x20, 0x61, 0x00, 0xe1, 0x00, 0x62,    0x00, 0x02, 0x00, 0xc2, 0x00, 0xe2, 0x03, 0xe1,
    0x12, 0xe2, 0x12, 0x21, 0x00, 0x61, 0x20, 0xe1,    0x00, 0x00, 0xc1, 0x00, 0xe2, 0x12, 0x21, 0x00,
    0x61, 0x00, 0x81, 0x00, 0x01, 0x40, 0xc1, 0x00,    0xe2, 0x12, 0xe1, 0x12, 0xe2, 0x12, 0xe1, 0x12,
    0xe2, 0x12, 0xe1, 0x12, 0xe2, 0x12, 0xe1, 0x12,    0xe2, 0x12, 0xe1, 0x12, 0xe2, 0x12, 0xe1, 0x12,
    0xe2, 0x14, 0x20, 0xe1, 0x11, 0x0c, 0xe2, 0x11,    0x0c, 0xa2, 0xe1, 0x11, 0x0c, 0xe2, 0x11, 0x0c,
    0xa2, 0xe1, 0x11, 0x0c, 0xe2, 0x11, 0x0c, 0xa2,    0xe1, 0x11, 0x0c, 0xe2, 0x11, 0x0c, 0xa2, 0xe1,
    0x11, 0x0c, 0xe2, 0x11, 0x0c, 0xa2, 0x3f, 0x20,    0xe9, 0x2a, 0xef, 0x81, 0x78, 0xe6, 0x2f, 0x6f,
    0xe6, 0x2a, 0xef, 0x00, 0x06, 0xef, 0x06, 0x06,    0x2f, 0x96, 0xe0, 0x07, 0x86, 0x00, 0xe6, 0x07,
    0xe0, 0x83, 0xc8, 0xe2, 0x02, 0x05, 0xe2, 0x0c,    0xe0, 0x80, 0x59, 0xc6, 0x00, 0xe6, 0x09, 0x20,
    0xc6, 0x00, 0x26, 0x00, 0x86, 0xe0, 0x80, 0x4d,    0xe5, 0x25, 0x40, 0xc6, 0xc4, 0x20, 0xe9, 0x02,
    0x60, 0x05, 0x0f, 0xe0, 0x80, 0xb8, 0xe5, 0x16,    0x06, 0xe0, 0x09, 0xe5, 0x24, 0x66, 0xe9, 0x02,
    0x80, 0x0d, 0xe0, 0x84, 0x58, 0xc5, 0x00, 0x65,    0x00, 0x25, 0x00, 0xe5, 0x07, 0x00, 0xe5, 0x80,
    0x3d, 0x20, 0xeb, 0x01, 0xc6, 0xe0, 0x21, 0xe1,    0x1a, 0xe2, 0x1a, 0xc6, 0x04, 0x60, 0xe9, 0x02,
    0x60, 0x36, 0xe0, 0x82, 0x89, 0xeb, 0x33, 0x0f,    0x4b, 0x0d, 0x6b, 0xe0, 0x44, 0xeb, 0x25, 0x0f,
    0xeb, 0x07, 0xe0, 0x80, 0x3a, 0x65, 0x00, 0xe5,    0x13, 0x00, 0x25, 0x00, 0x05, 0x20, 0x05, 0x00,
    0xe5, 0x02, 0x00, 0x65, 0x00, 0x05, 0x00, 0x05,    0xa0, 0x05, 0x60, 0x05, 0x00, 0x05, 0x00, 0x05,
    0x00, 0x45, 0x00, 0x25, 0x00, 0x05, 0x20, 0x05,    0x00, 0x05, 0x00, 0x05, 0x00, 0x05, 0x00, 0x05,
    0x00, 0x25, 0x00, 0x05, 0x20, 0x65, 0x00, 0xc5,    0x00, 0x65, 0x00, 0x65, 0x00, 0x05, 0x00, 0xe5,
    0x02, 0x00, 0xe5, 0x09, 0x80, 0x45, 0x00, 0x85,    0x00, 0xe5, 0x09, 0xe0, 0x2c, 0x2c, 0xe0, 0x80,
    0x86, 0xef, 0x24, 0x60, 0xef, 0x5c, 0xe0, 0x04,    0xef, 0x07, 0x20, 0xef, 0x07, 0x00, 0xef, 0x07,
    0x00, 0xef, 0x1d, 0xe0, 0x02, 0xeb, 0x05, 0xef,    0x80, 0x19, 0xe0, 0x30, 0xef, 0x15, 0xe0, 0x05,
    0xef, 0x24, 0x60, 0xef, 0x01, 0xc0, 0x2f, 0xe0,    0x06, 0xaf, 0xe0, 0x80, 0x12, 0xef, 0x80, 0x73,
    0x8e, 0xef, 0x82, 0x50, 0x80, 0xef, 0x08, 0x40,    0xef, 0x05, 0x40, 0xef, 0x6c, 0xe0, 0x04, 0xef,
    0x51, 0xc0, 0xef, 0x04, 0x60, 0x0f, 0xe0, 0x07,    0xef, 0x04, 0x60, 0xef, 0x30, 0xe0, 0x00, 0xef,
    0x02, 0xa0, 0xef, 0x20, 0xe0, 0x00, 0xef, 0x16,    0x20, 0x2f, 0xe0, 0x46, 0xef, 0x80, 0xcc, 0xe0,
    0x04, 0xef, 0x06, 0x20, 0x8f, 0x40, 0x8f, 0x40,    0xcf, 0xe0, 0x01, 0xef, 0x15, 0x40, 0xef, 0x03,
    0x80, 0xaf, 0xe0, 0x02, 0xef, 0x02, 0xa0, 0xef,    0x00, 0xe0, 0x00, 0xcf, 0xe0, 0x01, 0xef, 0x80,
    0x0b, 0x00, 0xef, 0x2f, 0xe0, 0x1d, 0xe9, 0x02,    0xe0, 0x83, 0x7e, 0xe5, 0xc0, 0x66, 0x58, 0xe0,
    0x18, 0xe5, 0x8f, 0xb1, 0xc0, 0xe5, 0x80, 0x56,    0x20, 0xe5, 0x95, 0xfa, 0xe0, 0x06, 0xe5, 0x9c,
    0xa9, 0xe0, 0x8b, 0x97, 0xe5, 0x81, 0x96, 0xe0,    0x85, 0x5a, 0xe5, 0x92, 0xc3, 0xe0, 0xca, 0xac,
    0x2e, 0x1b, 0xe0, 0x16, 0xfb, 0x58, 0xe0, 0x78,    0xe6, 0x80, 0x68, 0xe0, 0xc0, 0xbd, 0x88, 0xfd,
    0xc0, 0xbf, 0x76, 0x20, 0xfd, 0xc0, 0xbf, 0x76,    0x20,
};

typedef enum {
    UNICODE_SCRIPT_Unknown,
    UNICODE_SCRIPT_Adlam,
    UNICODE_SCRIPT_Ahom,
    UNICODE_SCRIPT_Anatolian_Hieroglyphs,
    UNICODE_SCRIPT_Arabic,
    UNICODE_SCRIPT_Armenian,
    UNICODE_SCRIPT_Avestan,
    UNICODE_SCRIPT_Balinese,
    UNICODE_SCRIPT_Bamum,
    UNICODE_SCRIPT_Bassa_Vah,
    UNICODE_SCRIPT_Batak,
    UNICODE_SCRIPT_Bengali,
    UNICODE_SCRIPT_Bhaiksuki,
    UNICODE_SCRIPT_Bopomofo,
    UNICODE_SCRIPT_Brahmi,
    UNICODE_SCRIPT_Braille,
    UNICODE_SCRIPT_Buginese,
    UNICODE_SCRIPT_Buhid,
    UNICODE_SCRIPT_Canadian_Aboriginal,
    UNICODE_SCRIPT_Carian,
    UNICODE_SCRIPT_Caucasian_Albanian,
    UNICODE_SCRIPT_Chakma,
    UNICODE_SCRIPT_Cham,
    UNICODE_SCRIPT_Cherokee,
    UNICODE_SCRIPT_Chorasmian,
    UNICODE_SCRIPT_Common,
    UNICODE_SCRIPT_Coptic,
    UNICODE_SCRIPT_Cuneiform,
    UNICODE_SCRIPT_Cypriot,
    UNICODE_SCRIPT_Cyrillic,
    UNICODE_SCRIPT_Cypro_Minoan,
    UNICODE_SCRIPT_Deseret,
    UNICODE_SCRIPT_Devanagari,
    UNICODE_SCRIPT_Dives_Akuru,
    UNICODE_SCRIPT_Dogra,
    UNICODE_SCRIPT_Duployan,
    UNICODE_SCRIPT_Egyptian_Hieroglyphs,
    UNICODE_SCRIPT_Elbasan,
    UNICODE_SCRIPT_Elymaic,
    UNICODE_SCRIPT_Ethiopic,
    UNICODE_SCRIPT_Georgian,
    UNICODE_SCRIPT_Glagolitic,
    UNICODE_SCRIPT_Gothic,
    UNICODE_SCRIPT_Grantha,
    UNICODE_SCRIPT_Greek,
    UNICODE_SCRIPT_Gujarati,
    UNICODE_SCRIPT_Gunjala_Gondi,
    UNICODE_SCRIPT_Gurmukhi,
    UNICODE_SCRIPT_Han,
    UNICODE_SCRIPT_Hangul,
    UNICODE_SCRIPT_Hanifi_Rohingya,
    UNICODE_SCRIPT_Hanunoo,
    UNICODE_SCRIPT_Hatran,
    UNICODE_SCRIPT_Hebrew,
    UNICODE_SCRIPT_Hiragana,
    UNICODE_SCRIPT_Imperial_Aramaic,
    UNICODE_SCRIPT_Inherited,
    UNICODE_SCRIPT_Inscriptional_Pahlavi,
    UNICODE_SCRIPT_Inscriptional_Parthian,
    UNICODE_SCRIPT_Javanese,
    UNICODE_SCRIPT_Kaithi,
    UNICODE_SCRIPT_Kannada,
    UNICODE_SCRIPT_Katakana,
    UNICODE_SCRIPT_Kayah_Li,
    UNICODE_SCRIPT_Kharoshthi,
    UNICODE_SCRIPT_Khmer,
    UNICODE_SCRIPT_Khojki,
    UNICODE_SCRIPT_Khitan_Small_Script,
    UNICODE_SCRIPT_Khudawadi,
    UNICODE_SCRIPT_Lao,
    UNICODE_SCRIPT_Latin,
    UNICODE_SCRIPT_Lepcha,
    UNICODE_SCRIPT_Limbu,
    UNICODE_SCRIPT_Linear_A,
    UNICODE_SCRIPT_Linear_B,
    UNICODE_SCRIPT_Lisu,
    UNICODE_SCRIPT_Lycian,
    UNICODE_SCRIPT_Lydian,
    UNICODE_SCRIPT_Makasar,
    UNICODE_SCRIPT_Mahajani,
    UNICODE_SCRIPT_Malayalam,
    UNICODE_SCRIPT_Mandaic,
    UNICODE_SCRIPT_Manichaean,
    UNICODE_SCRIPT_Marchen,
    UNICODE_SCRIPT_Masaram_Gondi,
    UNICODE_SCRIPT_Medefaidrin,
    UNICODE_SCRIPT_Meetei_Mayek,
    UNICODE_SCRIPT_Mende_Kikakui,
    UNICODE_SCRIPT_Meroitic_Cursive,
    UNICODE_SCRIPT_Meroitic_Hieroglyphs,
    UNICODE_SCRIPT_Miao,
    UNICODE_SCRIPT_Modi,
    UNICODE_SCRIPT_Mongolian,
    UNICODE_SCRIPT_Mro,
    UNICODE_SCRIPT_Multani,
    UNICODE_SCRIPT_Myanmar,
    UNICODE_SCRIPT_Nabataean,
    UNICODE_SCRIPT_Nandinagari,
    UNICODE_SCRIPT_New_Tai_Lue,
    UNICODE_SCRIPT_Newa,
    UNICODE_SCRIPT_Nko,
    UNICODE_SCRIPT_Nushu,
    UNICODE_SCRIPT_Nyiakeng_Puachue_Hmong,
    UNICODE_SCRIPT_Ogham,
    UNICODE_SCRIPT_Ol_Chiki,
    UNICODE_SCRIPT_Old_Hungarian,
    UNICODE_SCRIPT_Old_Italic,
    UNICODE_SCRIPT_Old_North_Arabian,
    UNICODE_SCRIPT_Old_Permic,
    UNICODE_SCRIPT_Old_Persian,
    UNICODE_SCRIPT_Old_Sogdian,
    UNICODE_SCRIPT_Old_South_Arabian,
    UNICODE_SCRIPT_Old_Turkic,
    UNICODE_SCRIPT_Old_Uyghur,
    UNICODE_SCRIPT_Oriya,
    UNICODE_SCRIPT_Osage,
    UNICODE_SCRIPT_Osmanya,
    UNICODE_SCRIPT_Pahawh_Hmong,
    UNICODE_SCRIPT_Palmyrene,
    UNICODE_SCRIPT_Pau_Cin_Hau,
    UNICODE_SCRIPT_Phags_Pa,
    UNICODE_SCRIPT_Phoenician,
    UNICODE_SCRIPT_Psalter_Pahlavi,
    UNICODE_SCRIPT_Rejang,
    UNICODE_SCRIPT_Runic,
    UNICODE_SCRIPT_Samaritan,
    UNICODE_SCRIPT_Saurashtra,
    UNICODE_SCRIPT_Sharada,
    UNICODE_SCRIPT_Shavian,
    UNICODE_SCRIPT_Siddham,
    UNICODE_SCRIPT_SignWriting,
    UNICODE_SCRIPT_Sinhala,
    UNICODE_SCRIPT_Sogdian,
    UNICODE_SCRIPT_Sora_Sompeng,
    UNICODE_SCRIPT_Soyombo,
    UNICODE_SCRIPT_Sundanese,
    UNICODE_SCRIPT_Syloti_Nagri,
    UNICODE_SCRIPT_Syriac,
    UNICODE_SCRIPT_Tagalog,
    UNICODE_SCRIPT_Tagbanwa,
    UNICODE_SCRIPT_Tai_Le,
    UNICODE_SCRIPT_Tai_Tham,
    UNICODE_SCRIPT_Tai_Viet,
    UNICODE_SCRIPT_Takri,
    UNICODE_SCRIPT_Tamil,
    UNICODE_SCRIPT_Tangut,
    UNICODE_SCRIPT_Telugu,
    UNICODE_SCRIPT_Thaana,
    UNICODE_SCRIPT_Thai,
    UNICODE_SCRIPT_Tibetan,
    UNICODE_SCRIPT_Tifinagh,
    UNICODE_SCRIPT_Tirhuta,
    UNICODE_SCRIPT_Tangsa,
    UNICODE_SCRIPT_Toto,
    UNICODE_SCRIPT_Ugaritic,
    UNICODE_SCRIPT_Vai,
    UNICODE_SCRIPT_Vithkuqi,
    UNICODE_SCRIPT_Wancho,
    UNICODE_SCRIPT_Warang_Citi,
    UNICODE_SCRIPT_Yezidi,
    UNICODE_SCRIPT_Yi,
    UNICODE_SCRIPT_Zanabazar_Square,
    UNICODE_SCRIPT_COUNT,
} UnicodeScriptEnum;

static const char unicode_script_name_table[] =
    "Adlam,Adlm"                  "\0"
    "Ahom,Ahom"                   "\0"
    "Anatolian_Hieroglyphs,Hluw"  "\0"
    "Arabic,Arab"                 "\0"
    "Armenian,Armn"               "\0"
    "Avestan,Avst"                "\0"
    "Balinese,Bali"               "\0"
    "Bamum,Bamu"                  "\0"
    "Bassa_Vah,Bass"              "\0"
    "Batak,Batk"                  "\0"
    "Bengali,Beng"                "\0"
    "Bhaiksuki,Bhks"              "\0"
    "Bopomofo,Bopo"               "\0"
    "Brahmi,Brah"                 "\0"
    "Braille,Brai"                "\0"
    "Buginese,Bugi"               "\0"
    "Buhid,Buhd"                  "\0"
    "Canadian_Aboriginal,Cans"    "\0"
    "Carian,Cari"                 "\0"
    "Caucasian_Albanian,Aghb"     "\0"
    "Chakma,Cakm"                 "\0"
    "Cham,Cham"                   "\0"
    "Cherokee,Cher"               "\0"
    "Chorasmian,Chrs"             "\0"
    "Common,Zyyy"                 "\0"
    "Coptic,Copt,Qaac"            "\0"
    "Cuneiform,Xsux"              "\0"
    "Cypriot,Cprt"                "\0"
    "Cyrillic,Cyrl"               "\0"
    "Cypro_Minoan,Cpmn"           "\0"
    "Deseret,Dsrt"                "\0"
    "Devanagari,Deva"             "\0"
    "Dives_Akuru,Diak"            "\0"
    "Dogra,Dogr"                  "\0"
    "Duployan,Dupl"               "\0"
    "Egyptian_Hieroglyphs,Egyp"   "\0"
    "Elbasan,Elba"                "\0"
    "Elymaic,Elym"                "\0"
    "Ethiopic,Ethi"               "\0"
    "Georgian,Geor"               "\0"
    "Glagolitic,Glag"             "\0"
    "Gothic,Goth"                 "\0"
    "Grantha,Gran"                "\0"
    "Greek,Grek"                  "\0"
    "Gujarati,Gujr"               "\0"
    "Gunjala_Gondi,Gong"          "\0"
    "Gurmukhi,Guru"               "\0"
    "Han,Hani"                    "\0"
    "Hangul,Hang"                 "\0"
    "Hanifi_Rohingya,Rohg"        "\0"
    "Hanunoo,Hano"                "\0"
    "Hatran,Hatr"                 "\0"
    "Hebrew,Hebr"                 "\0"
    "Hiragana,Hira"               "\0"
    "Imperial_Aramaic,Armi"       "\0"
    "Inherited,Zinh,Qaai"         "\0"
    "Inscriptional_Pahlavi,Phli"  "\0"
    "Inscriptional_Parthian,Prti" "\0"
    "Javanese,Java"               "\0"
    "Kaithi,Kthi"                 "\0"
    "Kannada,Knda"                "\0"
    "Katakana,Kana"               "\0"
    "Kayah_Li,Kali"               "\0"
    "Kharoshthi,Khar"             "\0"
    "Khmer,Khmr"                  "\0"
    "Khojki,Khoj"                 "\0"
    "Khitan_Small_Script,Kits"    "\0"
    "Khudawadi,Sind"              "\0"
    "Lao,Laoo"                    "\0"
    "Latin,Latn"                  "\0"
    "Lepcha,Lepc"                 "\0"
    "Limbu,Limb"                  "\0"
    "Linear_A,Lina"               "\0"
    "Linear_B,Linb"               "\0"
    "Lisu,Lisu"                   "\0"
    "Lycian,Lyci"                 "\0"
    "Lydian,Lydi"                 "\0"
    "Makasar,Maka"                "\0"
    "Mahajani,Mahj"               "\0"
    "Malayalam,Mlym"              "\0"
    "Mandaic,Mand"                "\0"
    "Manichaean,Mani"             "\0"
    "Marchen,Marc"                "\0"
    "Masaram_Gondi,Gonm"          "\0"
    "Medefaidrin,Medf"            "\0"
    "Meetei_Mayek,Mtei"           "\0"
    "Mende_Kikakui,Mend"          "\0"
    "Meroitic_Cursive,Merc"       "\0"
    "Meroitic_Hieroglyphs,Mero"   "\0"
    "Miao,Plrd"                   "\0"
    "Modi,Modi"                   "\0"
    "Mongolian,Mong"              "\0"
    "Mro,Mroo"                    "\0"
    "Multani,Mult"                "\0"
    "Myanmar,Mymr"                "\0"
    "Nabataean,Nbat"              "\0"
    "Nandinagari,Nand"            "\0"
    "New_Tai_Lue,Talu"            "\0"
    "Newa,Newa"                   "\0"
    "Nko,Nkoo"                    "\0"
    "Nushu,Nshu"                  "\0"
    "Nyiakeng_Puachue_Hmong,Hmnp" "\0"
    "Ogham,Ogam"                  "\0"
    "Ol_Chiki,Olck"               "\0"
    "Old_Hungarian,Hung"          "\0"
    "Old_Italic,Ital"             "\0"
    "Old_North_Arabian,Narb"      "\0"
    "Old_Permic,Perm"             "\0"
    "Old_Persian,Xpeo"            "\0"
    "Old_Sogdian,Sogo"            "\0"
    "Old_South_Arabian,Sarb"      "\0"
    "Old_Turkic,Orkh"             "\0"
    "Old_Uyghur,Ougr"             "\0"
    "Oriya,Orya"                  "\0"
    "Osage,Osge"                  "\0"
    "Osmanya,Osma"                "\0"
    "Pahawh_Hmong,Hmng"           "\0"
    "Palmyrene,Palm"              "\0"
    "Pau_Cin_Hau,Pauc"            "\0"
    "Phags_Pa,Phag"               "\0"
    "Phoenician,Phnx"             "\0"
    "Psalter_Pahlavi,Phlp"        "\0"
    "Rejang,Rjng"                 "\0"
    "Runic,Runr"                  "\0"
    "Samaritan,Samr"              "\0"
    "Saurashtra,Saur"             "\0"
    "Sharada,Shrd"                "\0"
    "Shavian,Shaw"                "\0"
    "Siddham,Sidd"                "\0"
    "SignWriting,Sgnw"            "\0"
    "Sinhala,Sinh"                "\0"
    "Sogdian,Sogd"                "\0"
    "Sora_Sompeng,Sora"           "\0"
    "Soyombo,Soyo"                "\0"
    "Sundanese,Sund"              "\0"
    "Syloti_Nagri,Sylo"           "\0"
    "Syriac,Syrc"                 "\0"
    "Tagalog,Tglg"                "\0"
    "Tagbanwa,Tagb"               "\0"
    "Tai_Le,Tale"                 "\0"
    "Tai_Tham,Lana"               "\0"
    "Tai_Viet,Tavt"               "\0"
    "Takri,Takr"                  "\0"
    "Tamil,Taml"                  "\0"
    "Tangut,Tang"                 "\0"
    "Telugu,Telu"                 "\0"
    "Thaana,Thaa"                 "\0"
    "Thai,Thai"                   "\0"
    "Tibetan,Tibt"                "\0"
    "Tifinagh,Tfng"               "\0"
    "Tirhuta,Tirh"                "\0"
    "Tangsa,Tnsa"                 "\0"
    "Toto,Toto"                   "\0"
    "Ugaritic,Ugar"               "\0"
    "Vai,Vaii"                    "\0"
    "Vithkuqi,Vith"               "\0"
    "Wancho,Wcho"                 "\0"
    "Warang_Citi,Wara"            "\0"
    "Yezidi,Yezi"                 "\0"
    "Yi,Yiii"                     "\0"
    "Zanabazar_Square,Zanb"       "\0"
;

static const uint8_t unicode_script_table[2690] = {
    0xc0, 0x19, 0x99, 0x46, 0x85, 0x19, 0x99, 0x46,
    0xae, 0x19, 0x80, 0x46, 0x8e, 0x19, 0x80, 0x46,
    0x84, 0x19, 0x96, 0x46, 0x80, 0x19, 0x9e, 0x46,
    0x80, 0x19, 0xe1, 0x60, 0x46, 0xa6, 0x19, 0x84,
    0x46, 0x84, 0x19, 0x81, 0x0d, 0x93, 0x19, 0xe0,
    0x0f, 0x38, 0x83, 0x2c, 0x80, 0x19, 0x82, 0x2c,
    0x01, 0x83, 0x2c, 0x80, 0x19, 0x80, 0x2c, 0x03,
    0x80, 0x2c, 0x80, 0x19, 0x80, 0x2c, 0x80, 0x19,
    0x82, 0x2c, 0x00, 0x80, 0x2c, 0x00, 0x93, 0x2c,
    0x00, 0xbe, 0x2c, 0x8d, 0x1a, 0x8f, 0x2c, 0xe0,
    0x24, 0x1d, 0x81, 0x38, 0xe0, 0x48, 0x1d, 0x00,
    0xa5, 0x05, 0x01, 0xb1, 0x05, 0x01, 0x82, 0x05,
    0x00, 0xb6, 0x35, 0x07, 0x9a, 0x35, 0x03, 0x85,
    0x35, 0x0a, 0x84, 0x04, 0x80, 0x19, 0x85, 0x04,
    0x80, 0x19, 0x8d, 0x04, 0x80, 0x19, 0x82, 0x04,
    0x80, 0x19, 0x9f, 0x04, 0x80, 0x19, 0x89, 0x04,
    0x8a, 0x38, 0x99, 0x04, 0x80, 0x38, 0xe0, 0x0b,
    0x04, 0x80, 0x19, 0xa1, 0x04, 0x8d, 0x89, 0x00,
    0xbb, 0x89, 0x01, 0x82, 0x89, 0xaf, 0x04, 0xb1,
    0x93, 0x0d, 0xba, 0x64, 0x01, 0x82, 0x64, 0xad,
    0x7d, 0x01, 0x8e, 0x7d, 0x00, 0x9b, 0x51, 0x01,
    0x80, 0x51, 0x00, 0x8a, 0x89, 0x04, 0x9e, 0x04,
    0x00, 0x81, 0x04, 0x05, 0xc9, 0x04, 0x80, 0x19,
    0x9c, 0x04, 0xd0, 0x20, 0x83, 0x38, 0x8e, 0x20,
    0x81, 0x19, 0x99, 0x20, 0x83, 0x0b, 0x00, 0x87,
    0x0b, 0x01, 0x81, 0x0b, 0x01, 0x95, 0x0b, 0x00,
    0x86, 0x0b, 0x00, 0x80, 0x0b, 0x02, 0x83, 0x0b,
    0x01, 0x88, 0x0b, 0x01, 0x81, 0x0b, 0x01, 0x83,
    0x0b, 0x07, 0x80, 0x0b, 0x03, 0x81, 0x0b, 0x00,
    0x84, 0x0b, 0x01, 0x98, 0x0b, 0x01, 0x82, 0x2f,
    0x00, 0x85, 0x2f, 0x03, 0x81, 0x2f, 0x01, 0x95,
    0x2f, 0x00, 0x86, 0x2f, 0x00, 0x81, 0x2f, 0x00,
    0x81, 0x2f, 0x00, 0x81, 0x2f, 0x01, 0x80, 0x2f,
    0x00, 0x84, 0x2f, 0x03, 0x81, 0x2f, 0x01, 0x82,
    0x2f, 0x02, 0x80, 0x2f, 0x06, 0x83, 0x2f, 0x00,
    0x80, 0x2f, 0x06, 0x90, 0x2f, 0x09, 0x82, 0x2d,
    0x00, 0x88, 0x2d, 0x00, 0x82, 0x2d, 0x00, 0x95,
    0x2d, 0x00, 0x86, 0x2d, 0x00, 0x81, 0x2d, 0x00,
    0x84, 0x2d, 0x01, 0x89, 0x2d, 0x00, 0x82, 0x2d,
    0x00, 0x82, 0x2d, 0x01, 0x80, 0x2d, 0x0e, 0x83,
    0x2d, 0x01, 0x8b, 0x2d, 0x06, 0x86, 0x2d, 0x00,
    0x82, 0x72, 0x00, 0x87, 0x72, 0x01, 0x81, 0x72,
    0x01, 0x95, 0x72, 0x00, 0x86, 0x72, 0x00, 0x81,
    0x72, 0x00, 0x84, 0x72, 0x01, 0x88, 0x72, 0x01,
    0x81, 0x72, 0x01, 0x82, 0x72, 0x06, 0x82, 0x72,
    0x03, 0x81, 0x72, 0x00, 0x84, 0x72, 0x01, 0x91,
    0x72, 0x09, 0x81, 0x90, 0x00, 0x85, 0x90, 0x02,
    0x82, 0x90, 0x00, 0x83, 0x90, 0x02, 0x81, 0x90,
    0x00, 0x80, 0x90, 0x00, 0x81, 0x90, 0x02, 0x81,
    0x90, 0x02, 0x82, 0x90, 0x02, 0x8b, 0x90, 0x03,
    0x84, 0x90, 0x02, 0x82, 0x90, 0x00, 0x83, 0x90,
    0x01, 0x80, 0x90, 0x05, 0x80, 0x90, 0x0d, 0x94,
    0x90, 0x04, 0x8c, 0x92, 0x00, 0x82, 0x92, 0x00,
    0x96, 0x92, 0x00, 0x8f, 0x92, 0x01, 0x88, 0x92,
    0x00, 0x82, 0x92, 0x00, 0x83, 0x92, 0x06, 0x81,
    0x92, 0x00, 0x82, 0x92, 0x01, 0x80, 0x92, 0x01,
    0x83, 0x92, 0x01, 0x89, 0x92, 0x06, 0x88, 0x92,
    0x8c, 0x3d, 0x00, 0x82, 0x3d, 0x00, 0x96, 0x3d,
    0x00, 0x89, 0x3d, 0x00, 0x84, 0x3d, 0x01, 0x88,
    0x3d, 0x00, 0x82, 0x3d, 0x00, 0x83, 0x3d, 0x06,
    0x81, 0x3d, 0x05, 0x81, 0x3d, 0x00, 0x83, 0x3d,
    0x01, 0x89, 0x3d, 0x00, 0x81, 0x3d, 0x0c, 0x8c,
    0x50, 0x00, 0x82, 0x50, 0x00, 0xb2, 0x50, 0x00,
    0x82, 0x50, 0x00, 0x85, 0x50, 0x03, 0x8f, 0x50,
    0x01, 0x99, 0x50, 0x00, 0x82, 0x83, 0x00, 0x91,
    0x83, 0x02, 0x97, 0x83, 0x00, 0x88, 0x83, 0x00,
    0x80, 0x83, 0x01, 0x86, 0x83, 0x02, 0x80, 0x83,
    0x03, 0x85, 0x83, 0x00, 0x80, 0x83, 0x00, 0x87,
    0x83, 0x05, 0x89, 0x83, 0x01, 0x82, 0x83, 0x0b,
    0xb9, 0x94, 0x03, 0x80, 0x19, 0x9b, 0x94, 0x24,
    0x81, 0x45, 0x00, 0x80, 0x45, 0x00, 0x84, 0x45,
    0x00, 0x97, 0x45, 0x00, 0x80, 0x45, 0x00, 0x96,
    0x45, 0x01, 0x84, 0x45, 0x00, 0x80, 0x45, 0x00,
    0x85, 0x45, 0x01, 0x89, 0x45, 0x01, 0x83, 0x45,
    0x1f, 0xc7, 0x95, 0x00, 0xa3, 0x95, 0x03, 0xa6,
    0x95, 0x00, 0xa3, 0x95, 0x00, 0x8e, 0x95, 0x00,
    0x86, 0x95, 0x83, 0x19, 0x81, 0x95, 0x24, 0xe0,
    0x3f, 0x5f, 0xa5, 0x28, 0x00, 0x80, 0x28, 0x04,
    0x80, 0x28, 0x01, 0xaa, 0x28, 0x80, 0x19, 0x83,
    0x28, 0xe0, 0x9f, 0x31, 0xc8, 0x27, 0x00, 0x83,
    0x27, 0x01, 0x86, 0x27, 0x00, 0x80, 0x27, 0x00,
    0x83, 0x27, 0x01, 0xa8, 0x27, 0x00, 0x83, 0x27,
    0x01, 0xa0, 0x27, 0x00, 0x83, 0x27, 0x01, 0x86,
    0x27, 0x00, 0x80, 0x27, 0x00, 0x83, 0x27, 0x01,
    0x8e, 0x27, 0x00, 0xb8, 0x27, 0x00, 0x83, 0x27,
    0x01, 0xc2, 0x27, 0x01, 0x9f, 0x27, 0x02, 0x99,
    0x27, 0x05, 0xd5, 0x17, 0x01, 0x85, 0x17, 0x01,
    0xe2, 0x1f, 0x12, 0x9c, 0x67, 0x02, 0xca, 0x7c,
    0x82, 0x19, 0x8a, 0x7c, 0x06, 0x95, 0x8a, 0x08,
    0x80, 0x8a, 0x94, 0x33, 0x81, 0x19, 0x08, 0x93,
    0x11, 0x0b, 0x8c, 0x8b, 0x00, 0x82, 0x8b, 0x00,
    0x81, 0x8b, 0x0b, 0xdd, 0x41, 0x01, 0x89, 0x41,
    0x05, 0x89, 0x41, 0x05, 0x81, 0x5c, 0x81, 0x19,
    0x80, 0x5c, 0x80, 0x19, 0x93, 0x5c, 0x05, 0xd8,
    0x5c, 0x06, 0xaa, 0x5c, 0x04, 0xc5, 0x12, 0x09,
    0x9e, 0x48, 0x00, 0x8b, 0x48, 0x03, 0x8b, 0x48,
    0x03, 0x80, 0x48, 0x02, 0x8b, 0x48, 0x9d, 0x8c,
    0x01, 0x84, 0x8c, 0x0a, 0xab, 0x62, 0x03, 0x99,
    0x62, 0x05, 0x8a, 0x62, 0x02, 0x81, 0x62, 0x9f,
    0x41, 0x9b, 0x10, 0x01, 0x81, 0x10, 0xbe, 0x8d,
    0x00, 0x9c, 0x8d, 0x01, 0x8a, 0x8d, 0x05, 0x89,
    0x8d, 0x05, 0x8d, 0x8d, 0x01, 0x9e, 0x38, 0x30,
    0xcc, 0x07, 0x02, 0xae, 0x07, 0x00, 0xbf, 0x87,
    0xb3, 0x0a, 0x07, 0x83, 0x0a, 0xb7, 0x47, 0x02,
    0x8e, 0x47, 0x02, 0x82, 0x47, 0xaf, 0x68, 0x88,
    0x1d, 0x06, 0xaa, 0x28, 0x01, 0x82, 0x28, 0x87,
    0x87, 0x07, 0x82, 0x38, 0x80, 0x19, 0x8c, 0x38,
    0x80, 0x19, 0x86, 0x38, 0x83, 0x19, 0x80, 0x38,
    0x85, 0x19, 0x80, 0x38, 0x82, 0x19, 0x81, 0x38,
    0x80, 0x19, 0x04, 0xa5, 0x46, 0x84, 0x2c, 0x80,
    0x1d, 0xb0, 0x46, 0x84, 0x2c, 0x83, 0x46, 0x84,
    0x2c, 0x8c, 0x46, 0x80, 0x1d, 0xc5, 0x46, 0x80,
    0x2c, 0xbf, 0x38, 0xe0, 0x9f, 0x46, 0x95, 0x2c,
    0x01, 0x85, 0x2c, 0x01, 0xa5, 0x2c, 0x01, 0x85,
    0x2c, 0x01, 0x87, 0x2c, 0x00, 0x80, 0x2c, 0x00,
    0x80, 0x2c, 0x00, 0x80, 0x2c, 0x00, 0x9e, 0x2c,
    0x01, 0xb4, 0x2c, 0x00, 0x8e, 0x2c, 0x00, 0x8d,
    0x2c, 0x01, 0x85, 0x2c, 0x00, 0x92, 0x2c, 0x01,
    0x82, 0x2c, 0x00, 0x88, 0x2c, 0x00, 0x8b, 0x19,
    0x81, 0x38, 0xd6, 0x19, 0x00, 0x8a, 0x19, 0x80,
    0x46, 0x01, 0x8a, 0x19, 0x80, 0x46, 0x8e, 0x19,
    0x00, 0x8c, 0x46, 0x02, 0xa0, 0x19, 0x0e, 0xa0,
    0x38, 0x0e, 0xa5, 0x19, 0x80, 0x2c, 0x82, 0x19,
    0x81, 0x46, 0x85, 0x19, 0x80, 0x46, 0x9a, 0x19,
    0x80, 0x46, 0x90, 0x19, 0xa8, 0x46, 0x82, 0x19,
    0x03, 0xe2, 0x36, 0x19, 0x18, 0x8a, 0x19, 0x14,
    0xe3, 0x3f, 0x19, 0xe0, 0x9f, 0x0f, 0xe2, 0x13,
    0x19, 0x01, 0x9f, 0x19, 0x00, 0xe0, 0x08, 0x19,
    0xdf, 0x29, 0x9f, 0x46, 0xe0, 0x13, 0x1a, 0x04,
    0x86, 0x1a, 0xa5, 0x28, 0x00, 0x80, 0x28, 0x04,
    0x80, 0x28, 0x01, 0xb7, 0x96, 0x06, 0x81, 0x96,
    0x0d, 0x80, 0x96, 0x96, 0x27, 0x08, 0x86, 0x27,
    0x00, 0x86, 0x27, 0x00, 0x86, 0x27, 0x00, 0x86,
    0x27, 0x00, 0x86, 0x27, 0x00, 0x86, 0x27, 0x00,
    0x86, 0x27, 0x00, 0x86, 0x27, 0x00, 0x9f, 0x1d,
    0xdd, 0x19, 0x21, 0x99, 0x30, 0x00, 0xd8, 0x30,
    0x0b, 0xe0, 0x75, 0x30, 0x19, 0x8b, 0x19, 0x03,
    0x84, 0x19, 0x80, 0x30, 0x80, 0x19, 0x80, 0x30,
    0x98, 0x19, 0x88, 0x30, 0x83, 0x38, 0x81, 0x31,
    0x87, 0x19, 0x83, 0x30, 0x83, 0x19, 0x00, 0xd5,
    0x36, 0x01, 0x81, 0x38, 0x81, 0x19, 0x82, 0x36,
    0x80, 0x19, 0xd9, 0x3e, 0x81, 0x19, 0x82, 0x3e,
    0x04, 0xaa, 0x0d, 0x00, 0xdd, 0x31, 0x00, 0x8f,
    0x19, 0x9f, 0x0d, 0xa3, 0x19, 0x0b, 0x8f, 0x3e,
    0x9e, 0x31, 0x00, 0xbf, 0x19, 0x9e, 0x31, 0xd0,
    0x19, 0xae, 0x3e, 0x80, 0x19, 0xd7, 0x3e, 0xe0,
    0x47, 0x19, 0xf0, 0x09, 0x5f, 0x30, 0xbf, 0x19,
    0xf0, 0x41, 0x9f, 0x30, 0xe4, 0x2c, 0xa0, 0x02,
    0xb6, 0xa0, 0x08, 0xaf, 0x4b, 0xe0, 0xcb, 0x9b,
    0x13, 0xdf, 0x1d, 0xd7, 0x08, 0x07, 0xa1, 0x19,
    0xe0, 0x05, 0x46, 0x82, 0x19, 0xbf, 0x46, 0x04,
    0x81, 0x46, 0x00, 0x80, 0x46, 0x00, 0x84, 0x46,
    0x17, 0x8d, 0x46, 0xac, 0x88, 0x02, 0x89, 0x19,
    0x05, 0xb7, 0x78, 0x07, 0xc5, 0x7e, 0x07, 0x8b,
    0x7e, 0x05, 0x9f, 0x20, 0xad, 0x3f, 0x80, 0x19,
    0x80, 0x3f, 0xa3, 0x7b, 0x0a, 0x80, 0x7b, 0x9c,
    0x31, 0x02, 0xcd, 0x3b, 0x00, 0x80, 0x19, 0x89,
    0x3b, 0x03, 0x81, 0x3b, 0x9e, 0x5f, 0x00, 0xb6,
    0x16, 0x08, 0x8d, 0x16, 0x01, 0x89, 0x16, 0x01,
    0x83, 0x16, 0x9f, 0x5f, 0xc2, 0x8e, 0x17, 0x84,
    0x8e, 0x96, 0x56, 0x09, 0x85, 0x27, 0x01, 0x85,
    0x27, 0x01, 0x85, 0x27, 0x08, 0x86, 0x27, 0x00,
    0x86, 0x27, 0x00, 0xaa, 0x46, 0x80, 0x19, 0x88,
    0x46, 0x80, 0x2c, 0x83, 0x46, 0x81, 0x19, 0x03,
    0xcf, 0x17, 0xad, 0x56, 0x01, 0x89, 0x56, 0x05,
    0xf0, 0x1b, 0x43, 0x31, 0x0b, 0x96, 0x31, 0x03,
    0xb0, 0x31, 0x70, 0x10, 0xa3, 0xe1, 0x0d, 0x30,
    0x01, 0xe0, 0x09, 0x30, 0x25, 0x86, 0x46, 0x0b,
    0x84, 0x05, 0x04, 0x99, 0x35, 0x00, 0x84, 0x35,
    0x00, 0x80, 0x35, 0x00, 0x81, 0x35, 0x00, 0x81,
    0x35, 0x00, 0x89, 0x35, 0xe0, 0x12, 0x04, 0x0f,
    0xe1, 0x0a, 0x04, 0x81, 0x19, 0xcf, 0x04, 0x01,
    0xb5, 0x04, 0x06, 0x80, 0x04, 0x1f, 0x8f, 0x04,
    0x8f, 0x38, 0x89, 0x19, 0x05, 0x8d, 0x38, 0x81,
    0x1d, 0xa2, 0x19, 0x00, 0x92, 0x19, 0x00, 0x83,
    0x19, 0x03, 0x84, 0x04, 0x00, 0xe0, 0x26, 0x04,
    0x01, 0x80, 0x19, 0x00, 0x9f, 0x19, 0x99, 0x46,
    0x85, 0x19, 0x99, 0x46, 0x8a, 0x19, 0x89, 0x3e,
    0x80, 0x19, 0xac, 0x3e, 0x81, 0x19, 0x9e, 0x31,
    0x02, 0x85, 0x31, 0x01, 0x85, 0x31, 0x01, 0x85,
    0x31, 0x01, 0x82, 0x31, 0x02, 0x86, 0x19, 0x00,
    0x86, 0x19, 0x09, 0x84, 0x19, 0x01, 0x8b, 0x4a,
    0x00, 0x99, 0x4a, 0x00, 0x92, 0x4a, 0x00, 0x81,
    0x4a, 0x00, 0x8e, 0x4a, 0x01, 0x8d, 0x4a, 0x21,
    0xe0, 0x1a, 0x4a, 0x04, 0x82, 0x19, 0x03, 0xac,
    0x19, 0x02, 0x88, 0x19, 0xce, 0x2c, 0x00, 0x8c,
    0x19, 0x02, 0x80, 0x2c, 0x2e, 0xac, 0x19, 0x80,
    0x38, 0x60, 0x21, 0x9c, 0x4c, 0x02, 0xb0, 0x13,
    0x0e, 0x80, 0x38, 0x9a, 0x19, 0x03, 0xa3, 0x6a,
    0x08, 0x82, 0x6a, 0x9a, 0x2a, 0x04, 0xaa, 0x6c,
    0x04, 0x9d, 0x9a, 0x00, 0x80, 0x9a, 0xa3, 0x6d,
    0x03, 0x8d, 0x6d, 0x29, 0xcf, 0x1f, 0xaf, 0x80,
    0x9d, 0x74, 0x01, 0x89, 0x74, 0x05, 0xa3, 0x73,
    0x03, 0xa3, 0x73, 0x03, 0xa7, 0x25, 0x07, 0xb3,
    0x14, 0x0a, 0x80, 0x14, 0x8a, 0x9c, 0x00, 0x8e,
    0x9c, 0x00, 0x86, 0x9c, 0x00, 0x81, 0x9c, 0x00,
    0x8a, 0x9c, 0x00, 0x8e, 0x9c, 0x00, 0x86, 0x9c,
    0x00, 0x81, 0x9c, 0x42, 0xe0, 0xd6, 0x49, 0x08,
    0x95, 0x49, 0x09, 0x87, 0x49, 0x17, 0x85, 0x46,
    0x00, 0xa9, 0x46, 0x00, 0x88, 0x46, 0x44, 0x85,
    0x1c, 0x01, 0x80, 0x1c, 0x00, 0xab, 0x1c, 0x00,
    0x81, 0x1c, 0x02, 0x80, 0x1c, 0x01, 0x80, 0x1c,
    0x95, 0x37, 0x00, 0x88, 0x37, 0x9f, 0x76, 0x9e,
    0x60, 0x07, 0x88, 0x60, 0x2f, 0x92, 0x34, 0x00,
    0x81, 0x34, 0x04, 0x84, 0x34, 0x9b, 0x79, 0x02,
    0x80, 0x79, 0x99, 0x4d, 0x04, 0x80, 0x4d, 0x3f,
    0x9f, 0x59, 0x97, 0x58, 0x03, 0x93, 0x58, 0x01,
    0xad, 0x58, 0x83, 0x40, 0x00, 0x81, 0x40, 0x04,
    0x87, 0x40, 0x00, 0x82, 0x40, 0x00, 0x9c, 0x40,
    0x01, 0x82, 0x40, 0x03, 0x89, 0x40, 0x06, 0x88,
    0x40, 0x06, 0x9f, 0x6f, 0x9f, 0x6b, 0x1f, 0xa6,
    0x52, 0x03, 0x8b, 0x52, 0x08, 0xb5, 0x06, 0x02,
    0x86, 0x06, 0x95, 0x3a, 0x01, 0x87, 0x3a, 0x92,
    0x39, 0x04, 0x87, 0x39, 0x91, 0x7a, 0x06, 0x83,
    0x7a, 0x0b, 0x86, 0x7a, 0x4f, 0xc8, 0x70, 0x36,
    0xb2, 0x69, 0x0c, 0xb2, 0x69, 0x06, 0x85, 0x69,
    0xa7, 0x32, 0x07, 0x89, 0x32, 0x60, 0xc5, 0x9e,
    0x04, 0x00, 0xa9, 0x9f, 0x00, 0x82, 0x9f, 0x01,
    0x81, 0x9f, 0x4d, 0xa7, 0x6e, 0x07, 0xa9, 0x84,
    0x15, 0x99, 0x71, 0x25, 0x9b, 0x18, 0x13, 0x96,
    0x26, 0x08, 0xcd, 0x0e, 0x03, 0xa3, 0x0e, 0x08,
    0x80, 0x0e, 0xc2, 0x3c, 0x09, 0x80, 0x3c, 0x01,
    0x98, 0x85, 0x06, 0x89, 0x85, 0x05, 0xb4, 0x15,
    0x00, 0x91, 0x15, 0x07, 0xa6, 0x4f, 0x08, 0xdf,
    0x7f, 0x00, 0x93, 0x83, 0x0a, 0x91, 0x42, 0x00,
    0xab, 0x42, 0x40, 0x86, 0x5e, 0x00, 0x80, 0x5e,
    0x00, 0x83, 0x5e, 0x00, 0x8e, 0x5e, 0x00, 0x8a,
    0x5e, 0x05, 0xba, 0x44, 0x04, 0x89, 0x44, 0x05,
    0x83, 0x2b, 0x00, 0x87, 0x2b, 0x01, 0x81, 0x2b,
    0x01, 0x95, 0x2b, 0x00, 0x86, 0x2b, 0x00, 0x81,
    0x2b, 0x00, 0x84, 0x2b, 0x00, 0x80, 0x38, 0x88,
    0x2b, 0x01, 0x81, 0x2b, 0x01, 0x82, 0x2b, 0x01,
    0x80, 0x2b, 0x05, 0x80, 0x2b, 0x04, 0x86, 0x2b,
    0x01, 0x86, 0x2b, 0x02, 0x84, 0x2b, 0x60, 0x2a,
    0xdb, 0x63, 0x00, 0x84, 0x63, 0x1d, 0xc7, 0x97,
    0x07, 0x89, 0x97, 0x60, 0x45, 0xb5, 0x81, 0x01,
    0xa5, 0x81, 0x21, 0xc4, 0x5b, 0x0a, 0x89, 0x5b,
    0x05, 0x8c, 0x5c, 0x12, 0xb9, 0x8f, 0x05, 0x89,
    0x8f, 0x35, 0x9a, 0x02, 0x01, 0x8e, 0x02, 0x03,
    0x96, 0x02, 0x60, 0x58, 0xbb, 0x22, 0x60, 0x03,
    0xd2, 0x9e, 0x0b, 0x80, 0x9e, 0x86, 0x21, 0x01,
    0x80, 0x21, 0x01, 0x87, 0x21, 0x00, 0x81, 0x21,
    0x00, 0x9d, 0x21, 0x00, 0x81, 0x21, 0x01, 0x8b,
    0x21, 0x08, 0x89, 0x21, 0x45, 0x87, 0x61, 0x01,
    0xad, 0x61, 0x01, 0x8a, 0x61, 0x1a, 0xc7, 0xa1,
    0x07, 0xd2, 0x86, 0x0c, 0x8f, 0x12, 0xb8, 0x77,
    0x60, 0xa6, 0x88, 0x0c, 0x00, 0xac, 0x0c, 0x00,
    0x8d, 0x0c, 0x09, 0x9c, 0x0c, 0x02, 0x9f, 0x53,
    0x01, 0x95, 0x53, 0x00, 0x8d, 0x53, 0x48, 0x86,
    0x54, 0x00, 0x81, 0x54, 0x00, 0xab, 0x54, 0x02,
    0x80, 0x54, 0x00, 0x81, 0x54, 0x00, 0x88, 0x54,
    0x07, 0x89, 0x54, 0x05, 0x85, 0x2e, 0x00, 0x81,
    0x2e, 0x00, 0xa4, 0x2e, 0x00, 0x81, 0x2e, 0x00,
    0x85, 0x2e, 0x06, 0x89, 0x2e, 0x60, 0xd5, 0x98,
    0x4e, 0x60, 0x56, 0x80, 0x4b, 0x0e, 0xb1, 0x90,
    0x0c, 0x80, 0x90, 0xe3, 0x39, 0x1b, 0x60, 0x05,
    0xe0, 0x0e, 0x1b, 0x00, 0x84, 0x1b, 0x0a, 0xe0,
    0x63, 0x1b, 0x69, 0xeb, 0xe0, 0x02, 0x1e, 0x0c,
    0xe3, 0xce, 0x24, 0x00, 0x88, 0x24, 0x6f, 0x66,
    0xe1, 0xe6, 0x03, 0x70, 0x11, 0x58, 0xe1, 0xd8,
    0x08, 0x06, 0x9e, 0x5d, 0x00, 0x89, 0x5d, 0x03,
    0x81, 0x5d, 0xce, 0x98, 0x00, 0x89, 0x98, 0x05,
    0x9d, 0x09, 0x01, 0x85, 0x09, 0x09, 0xc5, 0x75,
    0x09, 0x89, 0x75, 0x00, 0x86, 0x75, 0x00, 0x94,
    0x75, 0x04, 0x92, 0x75, 0x62, 0x4f, 0xda, 0x55,
    0x60, 0x04, 0xca, 0x5a, 0x03, 0xb8, 0x5a, 0x06,
    0x90, 0x5a, 0x3f, 0x80, 0x91, 0x80, 0x65, 0x81,
    0x30, 0x80, 0x43, 0x0a, 0x81, 0x30, 0x0d, 0xf0,
    0x07, 0x97, 0x91, 0x07, 0xe2, 0x9f, 0x91, 0xe1,
    0x75, 0x43, 0x29, 0x88, 0x91, 0x70, 0x12, 0x86,
    0x83, 0x3e, 0x00, 0x86, 0x3e, 0x00, 0x81, 0x3e,
    0x00, 0x80, 0x3e, 0xe0, 0xbe, 0x36, 0x82, 0x3e,
    0x2c, 0x82, 0x36, 0x10, 0x83, 0x3e, 0x07, 0xe1,
    0x2b, 0x65, 0x68, 0xa3, 0xe0, 0x0a, 0x23, 0x04,
    0x8c, 0x23, 0x02, 0x88, 0x23, 0x06, 0x89, 0x23,
    0x01, 0x83, 0x23, 0x83, 0x19, 0x70, 0x01, 0xfb,
    0xad, 0x38, 0x01, 0x96, 0x38, 0x08, 0xe0, 0x13,
    0x19, 0x3b, 0xe0, 0x95, 0x19, 0x09, 0xa6, 0x19,
    0x01, 0xbd, 0x19, 0x82, 0x38, 0x90, 0x19, 0x87,
    0x38, 0x81, 0x19, 0x86, 0x38, 0x9d, 0x19, 0x83,
    0x38, 0xbc, 0x19, 0x14, 0xc5, 0x2c, 0x60, 0x39,
    0x93, 0x19, 0x0b, 0xd6, 0x19, 0x08, 0x98, 0x19,
    0x60, 0x26, 0xd4, 0x19, 0x00, 0xc6, 0x19, 0x00,
    0x81, 0x19, 0x01, 0x80, 0x19, 0x01, 0x81, 0x19,
    0x01, 0x83, 0x19, 0x00, 0x8b, 0x19, 0x00, 0x80,
    0x19, 0x00, 0x86, 0x19, 0x00, 0xc0, 0x19, 0x00,
    0x83, 0x19, 0x01, 0x87, 0x19, 0x00, 0x86, 0x19,
    0x00, 0x9b, 0x19, 0x00, 0x83, 0x19, 0x00, 0x84,
    0x19, 0x00, 0x80, 0x19, 0x02, 0x86, 0x19, 0x00,
    0xe0, 0xf3, 0x19, 0x01, 0xe0, 0xc3, 0x19, 0x01,
    0xb1, 0x19, 0xe2, 0x2b, 0x82, 0x0e, 0x84, 0x82,
    0x00, 0x8e, 0x82, 0x63, 0xef, 0x9e, 0x46, 0x60,
    0x80, 0x86, 0x29, 0x00, 0x90, 0x29, 0x01, 0x86,
    0x29, 0x00, 0x81, 0x29, 0x00, 0x84, 0x29, 0x60,
    0x74, 0xac, 0x66, 0x02, 0x8d, 0x66, 0x01, 0x89,
    0x66, 0x03, 0x81, 0x66, 0x60, 0xdf, 0x9e, 0x99,
    0x10, 0xb9, 0x9d, 0x04, 0x80, 0x9d, 0x64, 0x7f,
    0x86, 0x27, 0x00, 0x83, 0x27, 0x00, 0x81, 0x27,
    0x00, 0x8e, 0x27, 0x00, 0xe0, 0x64, 0x57, 0x01,
    0x8f, 0x57, 0x28, 0xcb, 0x01, 0x03, 0x89, 0x01,
    0x03, 0x81, 0x01, 0x62, 0xb0, 0xc3, 0x19, 0x4b,
    0xbc, 0x19, 0x60, 0x61, 0x83, 0x04, 0x00, 0x9a,
    0x04, 0x00, 0x81, 0x04, 0x00, 0x80, 0x04, 0x01,
    0x80, 0x04, 0x00, 0x89, 0x04, 0x00, 0x83, 0x04,
    0x00, 0x80, 0x04, 0x00, 0x80, 0x04, 0x05, 0x80,
    0x04, 0x03, 0x80, 0x04, 0x00, 0x80, 0x04, 0x00,
    0x80, 0x04, 0x00, 0x82, 0x04, 0x00, 0x81, 0x04,
    0x00, 0x80, 0x04, 0x01, 0x80, 0x04, 0x00, 0x80,
    0x04, 0x00, 0x80, 0x04, 0x00, 0x80, 0x04, 0x00,
    0x80, 0x04, 0x00, 0x81, 0x04, 0x00, 0x80, 0x04,
    0x01, 0x83, 0x04, 0x00, 0x86, 0x04, 0x00, 0x83,
    0x04, 0x00, 0x83, 0x04, 0x00, 0x80, 0x04, 0x00,
    0x89, 0x04, 0x00, 0x90, 0x04, 0x04, 0x82, 0x04,
    0x00, 0x84, 0x04, 0x00, 0x90, 0x04, 0x33, 0x81,
    0x04, 0x60, 0xad, 0xab, 0x19, 0x03, 0xe0, 0x03,
    0x19, 0x0b, 0x8e, 0x19, 0x01, 0x8e, 0x19, 0x00,
    0x8e, 0x19, 0x00, 0xa4, 0x19, 0x09, 0xe0, 0x4d,
    0x19, 0x37, 0x99, 0x19, 0x80, 0x36, 0x81, 0x19,
    0x0c, 0xab, 0x19, 0x03, 0x88, 0x19, 0x06, 0x81,
    0x19, 0x0d, 0x85, 0x19, 0x60, 0x39, 0xe3, 0x77,
    0x19, 0x04, 0x8f, 0x19, 0x02, 0x8c, 0x19, 0x02,
    0xe0, 0x13, 0x19, 0x0b, 0xd8, 0x19, 0x06, 0x8b,
    0x19, 0x03, 0x80, 0x19, 0x0e, 0x8b, 0x19, 0x03,
    0xb7, 0x19, 0x07, 0x89, 0x19, 0x05, 0xa7, 0x19,
    0x07, 0x9d, 0x19, 0x01, 0x81, 0x19, 0x4d, 0xe0,
    0xf3, 0x19, 0x0b, 0x8d, 0x19, 0x01, 0x84, 0x19,
    0x02, 0x84, 0x19, 0x02, 0x86, 0x19, 0x08, 0x9c,
    0x19, 0x02, 0x8a, 0x19, 0x04, 0x85, 0x19, 0x09,
    0x89, 0x19, 0x05, 0x87, 0x19, 0x07, 0x86, 0x19,
    0x08, 0xe0, 0x32, 0x19, 0x00, 0xb6, 0x19, 0x24,
    0x89, 0x19, 0x63, 0xa5, 0xf0, 0x96, 0x7f, 0x30,
    0x1f, 0xef, 0xd8, 0x30, 0x06, 0xe0, 0x7d, 0x30,
    0x01, 0xf0, 0x06, 0x21, 0x30, 0x0d, 0xf0, 0x0c,
    0xd0, 0x30, 0x6b, 0xbe, 0xe1, 0xbd, 0x30, 0x65,
    0x81, 0xf0, 0x02, 0xea, 0x30, 0x7a, 0xdc, 0x55,
    0x80, 0x19, 0x1d, 0xdf, 0x19, 0x60, 0x1f, 0xe0,
    0x8f, 0x38,
};

static const uint8_t unicode_script_ext_table[828] = {
    0x82, 0xc1, 0x00, 0x00, 0x01, 0x2c, 0x01, 0x00,
    0x00, 0x01, 0x2c, 0x1c, 0x00, 0x0c, 0x01, 0x46,
    0x80, 0x92, 0x00, 0x00, 0x02, 0x1d, 0x6c, 0x00,
    0x02, 0x1d, 0x29, 0x01, 0x02, 0x1d, 0x46, 0x00,
    0x02, 0x1d, 0x29, 0x81, 0x03, 0x00, 0x00, 0x06,
    0x04, 0x64, 0x32, 0x89, 0x93, 0x9f, 0x0d, 0x00,
    0x00, 0x06, 0x04, 0x64, 0x32, 0x89, 0x93, 0x9f,
    0x00, 0x03, 0x04, 0x89, 0x93, 0x01, 0x00, 0x00,
    0x07, 0x01, 0x04, 0x64, 0x32, 0x89, 0x93, 0x9f,
    0x1f, 0x00, 0x00, 0x09, 0x01, 0x04, 0x51, 0x52,
    0x71, 0x7a, 0x32, 0x84, 0x89, 0x09, 0x00, 0x0a,
    0x02, 0x04, 0x89, 0x09, 0x00, 0x09, 0x03, 0x04,
    0x93, 0x9f, 0x05, 0x00, 0x00, 0x02, 0x04, 0x89,
    0x62, 0x00, 0x00, 0x02, 0x04, 0x32, 0x81, 0xfb,
    0x00, 0x00, 0x0d, 0x0b, 0x20, 0x2b, 0x2d, 0x2f,
    0x3d, 0x46, 0x50, 0x72, 0x7f, 0x90, 0x92, 0x97,
    0x00, 0x0c, 0x0b, 0x20, 0x2b, 0x2d, 0x2f, 0x3d,
    0x46, 0x50, 0x72, 0x90, 0x92, 0x97, 0x10, 0x00,
    0x00, 0x14, 0x0b, 0x20, 0x22, 0x2e, 0x54, 0x2b,
    0x2d, 0x2f, 0x3d, 0x4f, 0x50, 0x61, 0x72, 0x44,
    0x83, 0x88, 0x8f, 0x90, 0x92, 0x97, 0x00, 0x15,
    0x0b, 0x20, 0x22, 0x2e, 0x54, 0x2b, 0x2d, 0x2f,
    0x3d, 0x48, 0x4f, 0x50, 0x61, 0x72, 0x44, 0x83,
    0x88, 0x8f, 0x90, 0x92, 0x97, 0x09, 0x04, 0x20,
    0x22, 0x3c, 0x4f, 0x75, 0x00, 0x09, 0x03, 0x0b,
    0x15, 0x88, 0x75, 0x00, 0x09, 0x02, 0x2f, 0x5e,
    0x75, 0x00, 0x09, 0x02, 0x2d, 0x42, 0x80, 0x75,
    0x00, 0x0d, 0x02, 0x2b, 0x90, 0x80, 0x71, 0x00,
    0x09, 0x02, 0x3d, 0x61, 0x82, 0xcf, 0x00, 0x09,
    0x03, 0x15, 0x5f, 0x8c, 0x80, 0x30, 0x00, 0x00,
    0x02, 0x28, 0x46, 0x85, 0xb8, 0x00, 0x01, 0x04,
    0x11, 0x33, 0x8b, 0x8a, 0x80, 0x4a, 0x00, 0x01,
    0x02, 0x5c, 0x78, 0x00, 0x00, 0x00, 0x02, 0x5c,
    0x78, 0x84, 0x49, 0x00, 0x00, 0x04, 0x0b, 0x20,
    0x2b, 0x3d, 0x00, 0x01, 0x20, 0x00, 0x04, 0x0b,
    0x20, 0x2b, 0x3d, 0x00, 0x02, 0x20, 0x2b, 0x00,
    0x01, 0x20, 0x01, 0x02, 0x0b, 0x20, 0x00, 0x02,
    0x20, 0x7f, 0x00, 0x02, 0x0b, 0x20, 0x00, 0x02,
    0x20, 0x7f, 0x00, 0x06, 0x20, 0x3d, 0x50, 0x72,
    0x90, 0x92, 0x00, 0x01, 0x20, 0x01, 0x02, 0x20,
    0x7f, 0x01, 0x01, 0x20, 0x00, 0x02, 0x20, 0x7f,
    0x00, 0x02, 0x0b, 0x20, 0x06, 0x01, 0x20, 0x00,
    0x02, 0x20, 0x61, 0x00, 0x02, 0x0b, 0x20, 0x01,
    0x01, 0x20, 0x00, 0x02, 0x0b, 0x20, 0x03, 0x01,
    0x20, 0x00, 0x08, 0x0b, 0x20, 0x2b, 0x3d, 0x61,
    0x72, 0x92, 0x97, 0x00, 0x02, 0x20, 0x2b, 0x00,
    0x03, 0x20, 0x2b, 0x3d, 0x01, 0x02, 0x0b, 0x20,
    0x00, 0x01, 0x0b, 0x01, 0x02, 0x20, 0x2b, 0x00,
    0x01, 0x61, 0x80, 0x44, 0x00, 0x01, 0x01, 0x2c,
    0x35, 0x00, 0x00, 0x02, 0x1d, 0x89, 0x00, 0x00,
    0x00, 0x01, 0x89, 0x81, 0xb3, 0x00, 0x00, 0x02,
    0x46, 0x5c, 0x80, 0x3f, 0x00, 0x00, 0x03, 0x20,
    0x2b, 0x46, 0x8c, 0xd1, 0x00, 0x00, 0x02, 0x1d,
    0x29, 0x81, 0x3c, 0x00, 0x01, 0x06, 0x0d, 0x31,
    0x30, 0x36, 0x3e, 0xa0, 0x00, 0x05, 0x0d, 0x31,
    0x30, 0x36, 0x3e, 0x01, 0x00, 0x00, 0x01, 0x30,
    0x00, 0x00, 0x09, 0x06, 0x0d, 0x31, 0x30, 0x36,
    0x3e, 0xa0, 0x00, 0x00, 0x00, 0x05, 0x0d, 0x31,
    0x30, 0x36, 0x3e, 0x07, 0x06, 0x0d, 0x31, 0x30,
    0x36, 0x3e, 0xa0, 0x03, 0x05, 0x0d, 0x31, 0x30,
    0x36, 0x3e, 0x09, 0x00, 0x03, 0x02, 0x0d, 0x30,
    0x01, 0x00, 0x00, 0x05, 0x0d, 0x31, 0x30, 0x36,
    0x3e, 0x04, 0x02, 0x36, 0x3e, 0x00, 0x00, 0x00,
    0x05, 0x0d, 0x31, 0x30, 0x36, 0x3e, 0x03, 0x00,
    0x01, 0x03, 0x30, 0x36, 0x3e, 0x01, 0x01, 0x30,
    0x58, 0x00, 0x03, 0x02, 0x36, 0x3e, 0x02, 0x00,
    0x00, 0x02, 0x36, 0x3e, 0x59, 0x00, 0x00, 0x06,
    0x0d, 0x31, 0x30, 0x36, 0x3e, 0xa0, 0x00, 0x02,
    0x36, 0x3e, 0x80, 0x12, 0x00, 0x0f, 0x01, 0x30,
    0x1f, 0x00, 0x23, 0x01, 0x30, 0x3b, 0x00, 0x27,
    0x01, 0x30, 0x37, 0x00, 0x30, 0x01, 0x30, 0x0e,
    0x00, 0x0b, 0x01, 0x30, 0x32, 0x00, 0x00, 0x01,
    0x30, 0x57, 0x00, 0x18, 0x01, 0x30, 0x09, 0x00,
    0x04, 0x01, 0x30, 0x5f, 0x00, 0x1e, 0x01, 0x30,
    0xc0, 0x31, 0xef, 0x00, 0x00, 0x02, 0x1d, 0x29,
    0x80, 0x0f, 0x00, 0x07, 0x02, 0x30, 0x46, 0x80,
    0xa7, 0x00, 0x02, 0x0e, 0x20, 0x22, 0x2d, 0x2f,
    0x42, 0x3d, 0x3c, 0x4f, 0x50, 0x5b, 0x61, 0x44,
    0x8f, 0x97, 0x02, 0x0d, 0x20, 0x22, 0x2d, 0x2f,
    0x42, 0x3d, 0x3c, 0x4f, 0x5b, 0x61, 0x44, 0x8f,
    0x97, 0x03, 0x0b, 0x20, 0x22, 0x2d, 0x2f, 0x42,
    0x3c, 0x4f, 0x5b, 0x44, 0x8f, 0x97, 0x80, 0x36,
    0x00, 0x00, 0x02, 0x0b, 0x20, 0x00, 0x00, 0x00,
    0x02, 0x20, 0x90, 0x39, 0x00, 0x00, 0x03, 0x3f,
    0x46, 0x5f, 0x80, 0x1f, 0x00, 0x00, 0x02, 0x10,
    0x3b, 0xc0, 0x12, 0xed, 0x00, 0x01, 0x02, 0x04,
    0x64, 0x80, 0x31, 0x00, 0x00, 0x02, 0x04, 0x93,
    0x09, 0x00, 0x00, 0x02, 0x04, 0x93, 0x46, 0x00,
    0x01, 0x05, 0x0d, 0x31, 0x30, 0x36, 0x3e, 0x80,
    0x99, 0x00, 0x04, 0x06, 0x0d, 0x31, 0x30, 0x36,
    0x3e, 0xa0, 0x09, 0x00, 0x00, 0x02, 0x36, 0x3e,
    0x2c, 0x00, 0x01, 0x02, 0x36, 0x3e, 0x80, 0xdf,
    0x00, 0x01, 0x03, 0x1e, 0x1c, 0x4a, 0x00, 0x02,
    0x1c, 0x4a, 0x03, 0x00, 0x2c, 0x03, 0x1c, 0x49,
    0x4a, 0x02, 0x00, 0x08, 0x02, 0x1c, 0x4a, 0x81,
    0x1f, 0x00, 0x1b, 0x02, 0x04, 0x1a, 0x87, 0x75,
    0x00, 0x00, 0x02, 0x52, 0x71, 0x87, 0x8d, 0x00,
    0x00, 0x02, 0x2b, 0x90, 0x00, 0x00, 0x00, 0x02,
    0x2b, 0x90, 0x36, 0x00, 0x01, 0x02, 0x2b, 0x90,
    0x8c, 0x12, 0x00, 0x01, 0x02, 0x2b, 0x90, 0x00,
    0x00, 0x00, 0x02, 0x2b, 0x90, 0xc0, 0x5c, 0x4b,
    0x00, 0x03, 0x01, 0x23, 0x96, 0x3b, 0x00, 0x11,
    0x01, 0x30, 0x9e, 0x5d, 0x00, 0x01, 0x01, 0x30,
    0xce, 0xcd, 0x2d, 0x00,
};

static const uint8_t unicode_prop_Hyphen_table[28] = {
    0xac, 0x80, 0xfe, 0x80, 0x44, 0xdb, 0x80, 0x52,
    0x7a, 0x80, 0x48, 0x08, 0x81, 0x4e, 0x04, 0x80,
    0x42, 0xe2, 0x80, 0x60, 0xcd, 0x66, 0x80, 0x40,
    0xa8, 0x80, 0xd6, 0x80,
};

static const uint8_t unicode_prop_Other_Math_table[200] = {
    0xdd, 0x80, 0x43, 0x70, 0x11, 0x80, 0x99, 0x09,
    0x81, 0x5c, 0x1f, 0x80, 0x9a, 0x82, 0x8a, 0x80,
    0x9f, 0x83, 0x97, 0x81, 0x8d, 0x81, 0xc0, 0x8c,
    0x18, 0x11, 0x1c, 0x91, 0x03, 0x01, 0x89, 0x00,
    0x14, 0x28, 0x11, 0x09, 0x02, 0x05, 0x13, 0x24,
    0xca, 0x21, 0x18, 0x08, 0x08, 0x00, 0x21, 0x0b,
    0x0b, 0x91, 0x09, 0x00, 0x06, 0x00, 0x29, 0x41,
    0x21, 0x83, 0x40, 0xa7, 0x08, 0x80, 0x97, 0x80,
    0x90, 0x80, 0x41, 0xbc, 0x81, 0x8b, 0x88, 0x24,
    0x21, 0x09, 0x14, 0x8d, 0x00, 0x01, 0x85, 0x97,
    0x81, 0xb8, 0x00, 0x80, 0x9c, 0x83, 0x88, 0x81,
    0x41, 0x55, 0x81, 0x9e, 0x89, 0x41, 0x92, 0x95,
    0xbe, 0x83, 0x9f, 0x81, 0x60, 0xd4, 0x62, 0x00,
    0x03, 0x80, 0x40, 0xd2, 0x00, 0x80, 0x60, 0xd4,
    0xc0, 0xd4, 0x80, 0xc6, 0x01, 0x08, 0x09, 0x0b,
    0x80, 0x8b, 0x00, 0x06, 0x80, 0xc0, 0x03, 0x0f,
    0x06, 0x80, 0x9b, 0x03, 0x04, 0x00, 0x16, 0x80,
    0x41, 0x53, 0x81, 0x98, 0x80, 0x98, 0x80, 0x9e,
    0x80, 0x98, 0x80, 0x9e, 0x80, 0x98, 0x80, 0x9e,
    0x80, 0x98, 0x80, 0x9e, 0x80, 0x98, 0x07, 0x81,
    0xb1, 0x55, 0xff, 0x18, 0x9a, 0x01, 0x00, 0x08,
    0x80, 0x89, 0x03, 0x00, 0x00, 0x28, 0x18, 0x00,
    0x00, 0x02, 0x01, 0x00, 0x08, 0x00, 0x00, 0x00,
    0x00, 0x01, 0x00, 0x0b, 0x06, 0x03, 0x03, 0x00,
    0x80, 0x89, 0x80, 0x90, 0x22, 0x04, 0x80, 0x90,
};

static const uint8_t unicode_prop_Other_Alphabetic_table[417] = {
    0x43, 0x44, 0x80, 0x42, 0x69, 0x8d, 0x00, 0x01,
    0x01, 0x00, 0xc7, 0x8a, 0xaf, 0x8c, 0x06, 0x8f,
    0x80, 0xe4, 0x33, 0x19, 0x0b, 0x80, 0xa2, 0x80,
    0x9d, 0x8f, 0xe5, 0x8a, 0xe4, 0x0a, 0x88, 0x02,
    0x03, 0x40, 0xa6, 0x8b, 0x16, 0x85, 0x93, 0xb5,
    0x09, 0x8e, 0x01, 0x22, 0x89, 0x81, 0x9c, 0x82,
    0xb9, 0x31, 0x09, 0x81, 0x89, 0x80, 0x89, 0x81,
    0x9c, 0x82, 0xb9, 0x23, 0x09, 0x0b, 0x80, 0x9d,
    0x0a, 0x80, 0x8a, 0x82, 0xb9, 0x38, 0x10, 0x81,
    0x94, 0x81, 0x95, 0x13, 0x82, 0xb9, 0x31, 0x09,
    0x81, 0x88, 0x81, 0x89, 0x81, 0x9d, 0x80, 0xba,
    0x22, 0x10, 0x82, 0x89, 0x80, 0xa7, 0x83, 0xb9,
    0x30, 0x10, 0x17, 0x81, 0x8a, 0x81, 0x9c, 0x82,
    0xb9, 0x30, 0x10, 0x17, 0x81, 0x8a, 0x81, 0x9b,
    0x83, 0xb9, 0x30, 0x10, 0x82, 0x89, 0x80, 0x89,
    0x81, 0x9c, 0x82, 0xca, 0x28, 0x00, 0x87, 0x91,
    0x81, 0xbc, 0x01, 0x86, 0x91, 0x80, 0xe2, 0x01,
    0x28, 0x81, 0x8f, 0x80, 0x40, 0xa2, 0x90, 0x8a,
    0x8a, 0x80, 0xa3, 0xed, 0x8b, 0x00, 0x0b, 0x96,
    0x1b, 0x10, 0x11, 0x32, 0x83, 0x8c, 0x8b, 0x00,
    0x89, 0x83, 0x46, 0x73, 0x81, 0x9d, 0x81, 0x9d,
    0x81, 0x9d, 0x81, 0xc1, 0x92, 0x40, 0xbb, 0x81,
    0xa1, 0x80, 0xf5, 0x8b, 0x83, 0x88, 0x40, 0xdd,
    0x84, 0xb8, 0x89, 0x81, 0x93, 0xc9, 0x81, 0x8a,
    0x82, 0xb0, 0x84, 0xaf, 0x8e, 0xbb, 0x82, 0x9d,
    0x88, 0x09, 0xb8, 0x8a, 0xb1, 0x92, 0x41, 0xaf,
    0x8d, 0x46, 0xc0, 0xb3, 0x48, 0xf5, 0x9f, 0x60,
    0x78, 0x73, 0x87, 0xa1, 0x81, 0x41, 0x61, 0x07,
    0x80, 0x96, 0x84, 0xd7, 0x81, 0xb1, 0x8f, 0x00,
    0xb8, 0x80, 0xa5, 0x84, 0x9b, 0x8b, 0xac, 0x83,
    0xaf, 0x8b, 0xa4, 0x80, 0xc2, 0x8d, 0x8b, 0x07,
    0x81, 0xac, 0x82, 0xb1, 0x00, 0x11, 0x0c, 0x80,
    0xab, 0x24, 0x80, 0x40, 0xec, 0x87, 0x60, 0x4f,
    0x32, 0x80, 0x48, 0x56, 0x84, 0x46, 0x85, 0x10,
    0x0c, 0x83, 0x43, 0x13, 0x83, 0x41, 0x82, 0x81,
    0x41, 0x52, 0x82, 0xb4, 0x8d, 0xac, 0x81, 0x8c,
    0x80, 0xac, 0x88, 0x88, 0x80, 0xbc, 0x82, 0xa3,
    0x8b, 0x91, 0x81, 0xb8, 0x82, 0xaf, 0x8c, 0x8d,
    0x81, 0xdb, 0x88, 0x08, 0x28, 0x40, 0x9f, 0x89,
    0x96, 0x83, 0xb9, 0x31, 0x09, 0x81, 0x89, 0x80,
    0x89, 0x81, 0x40, 0xd0, 0x8c, 0x02, 0xe9, 0x91,
    0x40, 0xec, 0x31, 0x86, 0x9c, 0x81, 0xd1, 0x8e,
    0x00, 0xe9, 0x8a, 0xe6, 0x8d, 0x41, 0x00, 0x8c,
    0x40, 0xf6, 0x28, 0x09, 0x0a, 0x00, 0x80, 0x40,
    0x8d, 0x31, 0x2b, 0x80, 0x9b, 0x89, 0xa9, 0x20,
    0x83, 0x91, 0x8a, 0xad, 0x8d, 0x41, 0x96, 0x38,
    0x86, 0xd2, 0x95, 0x80, 0x8d, 0xf9, 0x2a, 0x00,
    0x08, 0x10, 0x02, 0x80, 0xc1, 0x20, 0x08, 0x83,
    0x41, 0x5b, 0x83, 0x60, 0x50, 0x57, 0x00, 0xb6,
    0x33, 0xdc, 0x81, 0x60, 0x4c, 0xab, 0x80, 0x60,
    0x23, 0x60, 0x30, 0x90, 0x0e, 0x01, 0x04, 0x49,
    0x1b, 0x80, 0x47, 0xe7, 0x99, 0x85, 0x99, 0x85,
    0x99,
};

static const uint8_t unicode_prop_Other_Lowercase_table[59] = {
    0x40, 0xa9, 0x80, 0x8e, 0x80, 0x41, 0xf4, 0x88,
    0x31, 0x9d, 0x84, 0xdf, 0x80, 0xb3, 0x80, 0x59,
    0xb0, 0xbe, 0x8c, 0x80, 0xa1, 0xa4, 0x42, 0xb0,
    0x80, 0x8c, 0x80, 0x8f, 0x8c, 0x40, 0xd2, 0x8f,
    0x43, 0x4f, 0x99, 0x47, 0x91, 0x81, 0x60, 0x7a,
    0x1d, 0x81, 0x40, 0xd1, 0x80, 0x40, 0x86, 0x81,
    0x43, 0x61, 0x83, 0x60, 0x5c, 0x1f, 0x01, 0x10,
    0xa9, 0x80, 0x88,
};

static const uint8_t unicode_prop_Other_Uppercase_table[15] = {
    0x60, 0x21, 0x5f, 0x8f, 0x43, 0x45, 0x99, 0x61,
    0xcc, 0x5f, 0x99, 0x85, 0x99, 0x85, 0x99,
};

static const uint8_t unicode_prop_Other_Grapheme_Extend_table[65] = {
    0x49, 0xbd, 0x80, 0x97, 0x80, 0x41, 0x65, 0x80,
    0x97, 0x80, 0xe5, 0x80, 0x97, 0x80, 0x40, 0xe9,
    0x80, 0x91, 0x81, 0xe6, 0x80, 0x97, 0x80, 0xf6,
    0x80, 0x8e, 0x80, 0x4d, 0x54, 0x80, 0x44, 0xd5,
    0x80, 0x50, 0x20, 0x81, 0x60, 0xcf, 0x6d, 0x81,
    0x53, 0x9d, 0x80, 0x97, 0x80, 0x41, 0x57, 0x80,
    0x8b, 0x80, 0x40, 0xf0, 0x80, 0x43, 0x7f, 0x80,
    0x60, 0xb8, 0x33, 0x07, 0x84, 0x6c, 0x2e, 0xac,
    0xdf,
};

static const uint8_t unicode_prop_Other_Default_Ignorable_Code_Point_table[32] = {
    0x43, 0x4e, 0x80, 0x4e, 0x0e, 0x81, 0x46, 0x52,
    0x81, 0x48, 0xae, 0x80, 0x50, 0xfd, 0x80, 0x60,
    0xce, 0x3a, 0x80, 0xce, 0x88, 0x6d, 0x00, 0x06,
    0x00, 0x9d, 0xdf, 0xff, 0x40, 0xef, 0x4e, 0x0f,
};

static const uint8_t unicode_prop_Other_ID_Start_table[11] = {
    0x58, 0x84, 0x81, 0x48, 0x90, 0x80, 0x94, 0x80,
    0x4f, 0x6b, 0x81,
};

static const uint8_t unicode_prop_Other_ID_Continue_table[12] = {
    0x40, 0xb6, 0x80, 0x42, 0xce, 0x80, 0x4f, 0xe0,
    0x88, 0x46, 0x67, 0x80,
};

static const uint8_t unicode_prop_Prepended_Concatenation_Mark_table[19] = {
    0x45, 0xff, 0x85, 0x40, 0xd6, 0x80, 0xb0, 0x80,
    0x41, 0x7f, 0x81, 0xcf, 0x80, 0x61, 0x07, 0xd9,
    0x80, 0x8e, 0x80,
};

static const uint8_t unicode_prop_XID_Start1_table[31] = {
    0x43, 0x79, 0x80, 0x4a, 0xb7, 0x80, 0xfe, 0x80,
    0x60, 0x21, 0xe6, 0x81, 0x60, 0xcb, 0xc0, 0x85,
    0x41, 0x95, 0x81, 0xf3, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x80, 0x41, 0x1e, 0x81,
};

static const uint8_t unicode_prop_XID_Continue1_table[23] = {
    0x43, 0x79, 0x80, 0x60, 0x2d, 0x1f, 0x81, 0x60,
    0xcb, 0xc0, 0x85, 0x41, 0x95, 0x81, 0xf3, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80,
};

static const uint8_t unicode_prop_Changes_When_Titlecased1_table[22] = {
    0x41, 0xc3, 0x08, 0x08, 0x81, 0xa4, 0x81, 0x4e,
    0xdc, 0xaa, 0x0a, 0x4e, 0x87, 0x3f, 0x3f, 0x87,
    0x8b, 0x80, 0x8e, 0x80, 0xae, 0x80,
};

static const uint8_t unicode_prop_Changes_When_Casefolded1_table[33] = {
    0x40, 0xde, 0x80, 0xcf, 0x80, 0x97, 0x80, 0x44,
    0x3c, 0x80, 0x59, 0x11, 0x80, 0x40, 0xe4, 0x3f,
    0x3f, 0x87, 0x89, 0x11, 0x05, 0x02, 0x11, 0x80,
    0xa9, 0x11, 0x80, 0x60, 0xdb, 0x07, 0x86, 0x8b,
    0x84,
};

static const uint8_t unicode_prop_Changes_When_NFKC_Casefolded1_table[448] = {
    0x40, 0x9f, 0x06, 0x00, 0x01, 0x00, 0x01, 0x12,
    0x10, 0x82, 0x9f, 0x80, 0xcf, 0x01, 0x80, 0x8b,
    0x07, 0x80, 0xfb, 0x01, 0x01, 0x80, 0xa5, 0x80,
    0x40, 0xbb, 0x88, 0x9e, 0x29, 0x84, 0xda, 0x08,
    0x81, 0x89, 0x80, 0xa3, 0x04, 0x02, 0x04, 0x08,
    0x80, 0xc9, 0x82, 0x9c, 0x80, 0x41, 0x93, 0x80,
    0x40, 0x93, 0x80, 0xd7, 0x83, 0x42, 0xde, 0x87,
    0xfb, 0x08, 0x80, 0xd2, 0x01, 0x80, 0xa1, 0x11,
    0x80, 0x40, 0xfc, 0x81, 0x42, 0xd4, 0x80, 0xfe,
    0x80, 0xa7, 0x81, 0xad, 0x80, 0xb5, 0x80, 0x88,
    0x03, 0x03, 0x03, 0x80, 0x8b, 0x80, 0x88, 0x00,
    0x26, 0x80, 0x90, 0x80, 0x88, 0x03, 0x03, 0x03,
    0x80, 0x8b, 0x80, 0x41, 0x41, 0x80, 0xe1, 0x81,
    0x46, 0x52, 0x81, 0xd4, 0x84, 0x45, 0x1b, 0x10,
    0x8a, 0x80, 0x91, 0x80, 0x9b, 0x8c, 0x80, 0xa1,
    0xa4, 0x40, 0xd9, 0x80, 0x40, 0xd5, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x01, 0x3f, 0x3f, 0x87,
    0x89, 0x11, 0x04, 0x00, 0x29, 0x04, 0x12, 0x80,
    0x88, 0x12, 0x80, 0x88, 0x11, 0x11, 0x04, 0x08,
    0x8f, 0x00, 0x20, 0x8b, 0x12, 0x2a, 0x08, 0x0b,
    0x00, 0x07, 0x82, 0x8c, 0x06, 0x92, 0x81, 0x9a,
    0x80, 0x8c, 0x8a, 0x80, 0xd6, 0x18, 0x10, 0x8a,
    0x01, 0x0c, 0x0a, 0x00, 0x10, 0x11, 0x02, 0x06,
    0x05, 0x1c, 0x85, 0x8f, 0x8f, 0x8f, 0x88, 0x80,
    0x40, 0xa1, 0x08, 0x81, 0x40, 0xf7, 0x81, 0x41,
    0x34, 0xd5, 0x99, 0x9a, 0x45, 0x20, 0x80, 0xe6,
    0x82, 0xe4, 0x80, 0x41, 0x9e, 0x81, 0x40, 0xf0,
    0x80, 0x41, 0x2e, 0x80, 0xd2, 0x80, 0x8b, 0x40,
    0xd5, 0xa9, 0x80, 0xb4, 0x00, 0x82, 0xdf, 0x09,
    0x80, 0xde, 0x80, 0xb0, 0xdd, 0x82, 0x8d, 0xdf,
    0x9e, 0x80, 0xa7, 0x87, 0xae, 0x80, 0x41, 0x7f,
    0x60, 0x72, 0x9b, 0x81, 0x40, 0xd1, 0x80, 0x40,
    0x80, 0x12, 0x81, 0x43, 0x61, 0x83, 0x88, 0x80,
    0x60, 0x4d, 0x95, 0x41, 0x0d, 0x08, 0x00, 0x81,
    0x89, 0x00, 0x00, 0x09, 0x82, 0xc3, 0x81, 0xe9,
    0xa5, 0x86, 0x8b, 0x24, 0x00, 0x97, 0x04, 0x00,
    0x01, 0x01, 0x80, 0xeb, 0xa0, 0x41, 0x6a, 0x91,
    0xbf, 0x81, 0xb5, 0xa7, 0x8c, 0x82, 0x99, 0x95,
    0x94, 0x81, 0x8b, 0x80, 0x92, 0x03, 0x1a, 0x00,
    0x80, 0x40, 0x86, 0x08, 0x80, 0x9f, 0x99, 0x40,
    0x83, 0x15, 0x0d, 0x0d, 0x0a, 0x16, 0x06, 0x80,
    0x88, 0x47, 0x87, 0x20, 0xa9, 0x80, 0x88, 0x60,
    0xb4, 0xe4, 0x83, 0x54, 0xb9, 0x86, 0x8d, 0x87,
    0xbf, 0x85, 0x42, 0x3e, 0xd4, 0x80, 0xc6, 0x01,
    0x08, 0x09, 0x0b, 0x80, 0x8b, 0x00, 0x06, 0x80,
    0xc0, 0x03, 0x0f, 0x06, 0x80, 0x9b, 0x03, 0x04,
    0x00, 0x16, 0x80, 0x41, 0x53, 0x81, 0x41, 0x23,
    0x81, 0xb1, 0x55, 0xff, 0x18, 0x9a, 0x01, 0x00,
    0x08, 0x80, 0x89, 0x03, 0x00, 0x00, 0x28, 0x18,
    0x00, 0x00, 0x02, 0x01, 0x00, 0x08, 0x00, 0x00,
    0x00, 0x00, 0x01, 0x00, 0x0b, 0x06, 0x03, 0x03,
    0x00, 0x80, 0x89, 0x80, 0x90, 0x22, 0x04, 0x80,
    0x90, 0x42, 0x43, 0x8a, 0x84, 0x9e, 0x80, 0x9f,
    0x99, 0x82, 0xa2, 0x80, 0xee, 0x82, 0x8c, 0xab,
    0x83, 0x88, 0x31, 0x49, 0x9d, 0x89, 0x60, 0xfc,
    0x05, 0x42, 0x1d, 0x6b, 0x05, 0xe1, 0x4f, 0xff,
};

static const uint8_t unicode_prop_ASCII_Hex_Digit_table[5] = {
    0xaf, 0x89, 0x35, 0x99, 0x85,
};

static const uint8_t unicode_prop_Bidi_Control_table[10] = {
    0x46, 0x1b, 0x80, 0x59, 0xf0, 0x81, 0x99, 0x84,
    0xb6, 0x83,
};

static const uint8_t unicode_prop_Dash_table[55] = {
    0xac, 0x80, 0x45, 0x5b, 0x80, 0xb2, 0x80, 0x4e,
    0x40, 0x80, 0x44, 0x04, 0x80, 0x48, 0x08, 0x85,
    0xbc, 0x80, 0xa6, 0x80, 0x8e, 0x80, 0x41, 0x85,
    0x80, 0x4c, 0x03, 0x01, 0x80, 0x9e, 0x0b, 0x80,
    0x9b, 0x80, 0x41, 0xbd, 0x80, 0x92, 0x80, 0xee,
    0x80, 0x60, 0xcd, 0x8f, 0x81, 0xa4, 0x80, 0x89,
    0x80, 0x40, 0xa8, 0x80, 0x4f, 0x9e, 0x80,
};

static const uint8_t unicode_prop_Deprecated_table[23] = {
    0x41, 0x48, 0x80, 0x45, 0x28, 0x80, 0x49, 0x02,
    0x00, 0x80, 0x48, 0x28, 0x81, 0x48, 0xc4, 0x85,
    0x42, 0xb8, 0x81, 0x6d, 0xdc, 0xd5, 0x80,
};

static const uint8_t unicode_prop_Diacritic_table[391] = {
    0xdd, 0x00, 0x80, 0xc6, 0x05, 0x03, 0x01, 0x81,
    0x41, 0xf6, 0x40, 0x9e, 0x07, 0x25, 0x90, 0x0b,
    0x80, 0x88, 0x81, 0x40, 0xfc, 0x84, 0x40, 0xd0,
    0x80, 0xb6, 0x90, 0x80, 0x9a, 0x00, 0x01, 0x00,
    0x40, 0x85, 0x3b, 0x81, 0x40, 0x85, 0x0b, 0x0a,
    0x82, 0xc2, 0x9a, 0xda, 0x8a, 0xb9, 0x8a, 0xa1,
    0x81, 0xfd, 0x87, 0xa8, 0x89, 0x8f, 0x9b, 0xbc,
    0x80, 0x8f, 0x02, 0x83, 0x9b, 0x80, 0xc9, 0x80,
    0x8f, 0x80, 0xed, 0x80, 0x8f, 0x80, 0xed, 0x80,
    0x8f, 0x80, 0xae, 0x82, 0xbb, 0x80, 0x8f, 0x06,
    0x80, 0xf6, 0x80, 0xed, 0x80, 0x8f, 0x80, 0xed,
    0x80, 0x8f, 0x80, 0xec, 0x81, 0x8f, 0x80, 0xfb,
    0x80, 0xfb, 0x28, 0x80, 0xea, 0x80, 0x8c, 0x84,
    0xca, 0x81, 0x9a, 0x00, 0x00, 0x03, 0x81, 0xc1,
    0x10, 0x81, 0xbd, 0x80, 0xef, 0x00, 0x81, 0xa7,
    0x0b, 0x84, 0x98, 0x30, 0x80, 0x89, 0x81, 0x42,
    0xc0, 0x82, 0x43, 0xb3, 0x81, 0x40, 0xb2, 0x8a,
    0x88, 0x80, 0x41, 0x5a, 0x82, 0x41, 0x38, 0x39,
    0x80, 0xaf, 0x8e, 0x81, 0x8a, 0xe7, 0x80, 0x8e,
    0x80, 0xa5, 0x88, 0xb5, 0x81, 0x40, 0x89, 0x81,
    0xbf, 0x85, 0xd1, 0x98, 0x18, 0x28, 0x0a, 0xb1,
    0xbe, 0xd8, 0x8b, 0xa4, 0x8a, 0x41, 0xbc, 0x00,
    0x82, 0x8a, 0x82, 0x8c, 0x82, 0x8c, 0x82, 0x8c,
    0x81, 0x4c, 0xef, 0x82, 0x41, 0x3c, 0x80, 0x41,
    0xf9, 0x85, 0xe8, 0x83, 0xde, 0x80, 0x60, 0x75,
    0x71, 0x80, 0x8b, 0x08, 0x80, 0x9b, 0x81, 0xd1,
    0x81, 0x8d, 0xa1, 0xe5, 0x82, 0xec, 0x81, 0x40,
    0xc9, 0x80, 0x9a, 0x91, 0xb8, 0x83, 0xa3, 0x80,
    0xde, 0x80, 0x8b, 0x80, 0xa3, 0x80, 0x40, 0x94,
    0x82, 0xc0, 0x83, 0xb2, 0x80, 0xe3, 0x84, 0x88,
    0x82, 0xff, 0x81, 0x60, 0x4f, 0x2f, 0x80, 0x43,
    0x00, 0x8f, 0x41, 0x0d, 0x00, 0x80, 0xae, 0x80,
    0xac, 0x81, 0xc2, 0x80, 0x42, 0xfb, 0x80, 0x44,
    0x9e, 0x28, 0xa9, 0x80, 0x88, 0x43, 0x29, 0x81,
    0x42, 0x3a, 0x85, 0x42, 0x1d, 0x8a, 0xb0, 0x83,
    0x40, 0xbf, 0x80, 0xa8, 0x80, 0xc7, 0x81, 0xf7,
    0x81, 0xbd, 0x80, 0xcb, 0x80, 0x88, 0x82, 0xe7,
    0x81, 0x40, 0xb1, 0x81, 0xd0, 0x80, 0x8f, 0x80,
    0x97, 0x32, 0x84, 0x40, 0xcc, 0x02, 0x80, 0xfa,
    0x81, 0x40, 0xfa, 0x81, 0xfd, 0x80, 0xf5, 0x81,
    0xf2, 0x80, 0x41, 0x0c, 0x81, 0x41, 0x01, 0x0b,
    0x80, 0x40, 0x9b, 0x80, 0xd2, 0x80, 0x91, 0x80,
    0xd0, 0x80, 0x41, 0xa4, 0x80, 0x41, 0x01, 0x00,
    0x81, 0xd0, 0x80, 0x60, 0x4d, 0x57, 0x84, 0xba,
    0x86, 0x44, 0x57, 0x90, 0xcf, 0x81, 0x60, 0x3f,
    0xfd, 0x18, 0x30, 0x81, 0x5f, 0x00, 0xad, 0x81,
    0x96, 0x42, 0x1f, 0x12, 0x2f, 0x39, 0x86, 0x9d,
    0x83, 0x4f, 0x81, 0x86, 0x41, 0x76, 0x80, 0xbc,
    0x83, 0x45, 0xdf, 0x86, 0xec, 0x10, 0x82,
};

static const uint8_t unicode_prop_Extender_table[92] = {
    0x40, 0xb6, 0x80, 0x42, 0x17, 0x81, 0x43, 0x6d,
    0x80, 0x41, 0xb8, 0x80, 0x43, 0x59, 0x80, 0x42,
    0xef, 0x80, 0xfe, 0x80, 0x49, 0x42, 0x80, 0xb7,
    0x80, 0x42, 0x62, 0x80, 0x41, 0x8d, 0x80, 0xc3,
    0x80, 0x53, 0x88, 0x80, 0xaa, 0x84, 0xe6, 0x81,
    0xdc, 0x82, 0x60, 0x6f, 0x15, 0x80, 0x45, 0xf5,
    0x80, 0x43, 0xc1, 0x80, 0x95, 0x80, 0x40, 0x88,
    0x80, 0xeb, 0x80, 0x94, 0x81, 0x60, 0x54, 0x7a,
    0x80, 0x48, 0x0f, 0x81, 0x4b, 0xd9, 0x80, 0x42,
    0x67, 0x82, 0x44, 0xce, 0x80, 0x60, 0x50, 0xa8,
    0x81, 0x44, 0x9b, 0x08, 0x80, 0x60, 0x71, 0x57,
    0x81, 0x48, 0x05, 0x82,
};

static const uint8_t unicode_prop_Hex_Digit_table[12] = {
    0xaf, 0x89, 0x35, 0x99, 0x85, 0x60, 0xfe, 0xa8,
    0x89, 0x35, 0x99, 0x85,
};

static const uint8_t unicode_prop_IDS_Binary_Operator_table[5] = {
    0x60, 0x2f, 0xef, 0x09, 0x87,
};

static const uint8_t unicode_prop_IDS_Trinary_Operator_table[4] = {
    0x60, 0x2f, 0xf1, 0x81,
};

static const uint8_t unicode_prop_Ideographic_table[66] = {
    0x60, 0x30, 0x05, 0x81, 0x98, 0x88, 0x8d, 0x82,
    0x43, 0xc4, 0x59, 0xbf, 0xbf, 0x60, 0x51, 0xff,
    0x60, 0x58, 0xff, 0x41, 0x6d, 0x81, 0xe9, 0x60,
    0x75, 0x09, 0x80, 0x9a, 0x57, 0xf7, 0x87, 0x44,
    0xd5, 0xa9, 0x88, 0x60, 0x24, 0x66, 0x41, 0x8b,
    0x60, 0x4d, 0x03, 0x60, 0xa6, 0xdf, 0x9f, 0x50,
    0x38, 0x86, 0x40, 0xdd, 0x81, 0x56, 0x81, 0x8d,
    0x5d, 0x30, 0x4c, 0x1e, 0x42, 0x1d, 0x45, 0xe1,
    0x53, 0x4a,
};

static const uint8_t unicode_prop_Join_Control_table[4] = {
    0x60, 0x20, 0x0b, 0x81,
};

static const uint8_t unicode_prop_Logical_Order_Exception_table[15] = {
    0x4e, 0x3f, 0x84, 0xfa, 0x84, 0x4a, 0xef, 0x11,
    0x80, 0x60, 0x90, 0xf9, 0x09, 0x00, 0x81,
};

static const uint8_t unicode_prop_Noncharacter_Code_Point_table[71] = {
    0x60, 0xfd, 0xcf, 0x9f, 0x42, 0x0d, 0x81, 0x60,
    0xff, 0xfd, 0x81, 0x60, 0xff, 0xfd, 0x81, 0x60,
    0xff, 0xfd, 0x81, 0x60, 0xff, 0xfd, 0x81, 0x60,
    0xff, 0xfd, 0x81, 0x60, 0xff, 0xfd, 0x81, 0x60,
    0xff, 0xfd, 0x81, 0x60, 0xff, 0xfd, 0x81, 0x60,
    0xff, 0xfd, 0x81, 0x60, 0xff, 0xfd, 0x81, 0x60,
    0xff, 0xfd, 0x81, 0x60, 0xff, 0xfd, 0x81, 0x60,
    0xff, 0xfd, 0x81, 0x60, 0xff, 0xfd, 0x81, 0x60,
    0xff, 0xfd, 0x81, 0x60, 0xff, 0xfd, 0x81,
};

static const uint8_t unicode_prop_Pattern_Syntax_table[58] = {
    0xa0, 0x8e, 0x89, 0x86, 0x99, 0x18, 0x80, 0x99,
    0x83, 0xa1, 0x30, 0x00, 0x08, 0x00, 0x0b, 0x03,
    0x02, 0x80, 0x96, 0x80, 0x9e, 0x80, 0x5f, 0x17,
    0x97, 0x87, 0x8e, 0x81, 0x92, 0x80, 0x89, 0x41,
    0x30, 0x42, 0xcf, 0x40, 0x9f, 0x42, 0x75, 0x9d,
    0x44, 0x6b, 0x41, 0xff, 0xff, 0x41, 0x80, 0x13,
    0x98, 0x8e, 0x80, 0x60, 0xcd, 0x0c, 0x81, 0x41,
    0x04, 0x81,
};

static const uint8_t unicode_prop_Pattern_White_Space_table[11] = {
    0x88, 0x84, 0x91, 0x80, 0xe3, 0x80, 0x5f, 0x87,
    0x81, 0x97, 0x81,
};

static const uint8_t unicode_prop_Quotation_Mark_table[31] = {
    0xa1, 0x03, 0x80, 0x40, 0x82, 0x80, 0x8e, 0x80,
    0x5f, 0x5b, 0x87, 0x98, 0x81, 0x4e, 0x06, 0x80,
    0x41, 0xc8, 0x83, 0x8c, 0x82, 0x60, 0xce, 0x20,
    0x83, 0x40, 0xbc, 0x03, 0x80, 0xd9, 0x81,
};

static const uint8_t unicode_prop_Radical_table[9] = {
    0x60, 0x2e, 0x7f, 0x99, 0x80, 0xd8, 0x8b, 0x40,
    0xd5,
};

static const uint8_t unicode_prop_Regional_Indicator_table[4] = {
    0x61, 0xf1, 0xe5, 0x99,
};

static const uint8_t unicode_prop_Sentence_Terminal_table[194] = {
    0xa0, 0x80, 0x8b, 0x80, 0x8f, 0x80, 0x45, 0x48,
    0x80, 0x40, 0x92, 0x82, 0x40, 0xb3, 0x80, 0xaa,
    0x82, 0x40, 0xf5, 0x80, 0xbc, 0x00, 0x02, 0x81,
    0x41, 0x24, 0x81, 0x46, 0xe3, 0x81, 0x43, 0x15,
    0x03, 0x81, 0x43, 0x04, 0x80, 0x40, 0xc5, 0x81,
    0x40, 0xcb, 0x04, 0x80, 0x41, 0x39, 0x81, 0x41,
    0x61, 0x83, 0x40, 0xad, 0x09, 0x81, 0x9c, 0x81,
    0x40, 0xbb, 0x81, 0xc0, 0x81, 0x43, 0xbb, 0x81,
    0x88, 0x82, 0x4d, 0xe3, 0x80, 0x8c, 0x80, 0x95,
    0x81, 0x41, 0xac, 0x80, 0x60, 0x74, 0xfb, 0x80,
    0x41, 0x0d, 0x81, 0x40, 0xe2, 0x02, 0x80, 0x41,
    0x7d, 0x81, 0xd5, 0x81, 0xde, 0x80, 0x40, 0x97,
    0x81, 0x40, 0x92, 0x82, 0x40, 0x8f, 0x81, 0x40,
    0xf8, 0x80, 0x60, 0x52, 0x65, 0x02, 0x81, 0x40,
    0xa8, 0x80, 0x8b, 0x80, 0x8f, 0x80, 0xc0, 0x80,
    0x4a, 0xf3, 0x81, 0x44, 0xfc, 0x84, 0xab, 0x83,
    0x40, 0xbc, 0x81, 0xf4, 0x83, 0xfe, 0x82, 0x40,
    0x80, 0x0d, 0x80, 0x8f, 0x81, 0xd7, 0x08, 0x81,
    0xeb, 0x80, 0x41, 0xa0, 0x81, 0x41, 0x74, 0x0c,
    0x8e, 0xe8, 0x81, 0x40, 0xf8, 0x82, 0x42, 0x04,
    0x00, 0x80, 0x40, 0xfa, 0x81, 0xd6, 0x81, 0x41,
    0xa3, 0x81, 0x42, 0xb3, 0x81, 0x60, 0x4b, 0x74,
    0x81, 0x40, 0x84, 0x80, 0xc0, 0x81, 0x8a, 0x80,
    0x43, 0x52, 0x80, 0x60, 0x4e, 0x05, 0x80, 0x5d,
    0xe7, 0x80,
};

static const uint8_t unicode_prop_Soft_Dotted_table[74] = {
    0xe8, 0x81, 0x40, 0xc3, 0x80, 0x41, 0x18, 0x80,
    0x9d, 0x80, 0xb3, 0x80, 0x93, 0x80, 0x41, 0x3f,
    0x80, 0xe1, 0x00, 0x80, 0x59, 0x08, 0x80, 0xb2,
    0x80, 0x8c, 0x02, 0x80, 0x40, 0x83, 0x80, 0x40,
    0x9c, 0x80, 0x41, 0xa4, 0x80, 0x40, 0xd5, 0x81,
    0x4b, 0x31, 0x80, 0x61, 0xa7, 0xa4, 0x81, 0xb1,
    0x81, 0xb1, 0x81, 0xb1, 0x81, 0xb1, 0x81, 0xb1,
    0x81, 0xb1, 0x81, 0xb1, 0x81, 0xb1, 0x81, 0xb1,
    0x81, 0xb1, 0x81, 0xb1, 0x81, 0xb1, 0x81, 0x48,
    0x85, 0x80,
};

static const uint8_t unicode_prop_Terminal_Punctuation_table[246] = {
    0xa0, 0x80, 0x89, 0x00, 0x80, 0x8a, 0x0a, 0x80,
    0x43, 0x3d, 0x07, 0x80, 0x42, 0x00, 0x80, 0xb8,
    0x80, 0xc7, 0x80, 0x8d, 0x00, 0x82, 0x40, 0xb3,
    0x80, 0xaa, 0x8a, 0x00, 0x40, 0xea, 0x81, 0xb5,
    0x8e, 0x9e, 0x80, 0x41, 0x04, 0x81, 0x44, 0xf3,
    0x81, 0x40, 0xab, 0x03, 0x85, 0x41, 0x36, 0x81,
    0x43, 0x14, 0x87, 0x43, 0x04, 0x80, 0xfb, 0x82,
    0xc6, 0x81, 0x40, 0x9c, 0x12, 0x80, 0xa6, 0x19,
    0x81, 0x41, 0x39, 0x81, 0x41, 0x61, 0x83, 0x40,
    0xad, 0x08, 0x82, 0x9c, 0x81, 0x40, 0xbb, 0x84,
    0xbd, 0x81, 0x43, 0xbb, 0x81, 0x88, 0x82, 0x4d,
    0xe3, 0x80, 0x8c, 0x03, 0x80, 0x89, 0x00, 0x0a,
    0x81, 0x41, 0xab, 0x81, 0x60, 0x74, 0xfa, 0x81,
    0x41, 0x0c, 0x82, 0x40, 0xe2, 0x84, 0x41, 0x7d,
    0x81, 0xd5, 0x81, 0xde, 0x80, 0x40, 0x96, 0x82,
    0x40, 0x92, 0x82, 0xfe, 0x80, 0x8f, 0x81, 0x40,
    0xf8, 0x80, 0x60, 0x52, 0x63, 0x10, 0x83, 0x40,
    0xa8, 0x80, 0x89, 0x00, 0x80, 0x8a, 0x0a, 0x80,
    0xc0, 0x01, 0x80, 0x44, 0x39, 0x80, 0xaf, 0x80,
    0x44, 0x85, 0x80, 0x40, 0xc6, 0x80, 0x41, 0x35,
    0x81, 0x40, 0x97, 0x85, 0xc3, 0x85, 0xd8, 0x83,
    0x43, 0xb7, 0x84, 0xab, 0x83, 0x40, 0xbc, 0x86,
    0xef, 0x83, 0xfe, 0x82, 0x40, 0x80, 0x0d, 0x80,
    0x8f, 0x81, 0xd7, 0x84, 0xeb, 0x80, 0x41, 0xa0,
    0x82, 0x8b, 0x81, 0x41, 0x65, 0x1a, 0x8e, 0xe8,
    0x81, 0x40, 0xf8, 0x82, 0x42, 0x04, 0x00, 0x80,
    0x40, 0xfa, 0x81, 0xd6, 0x0b, 0x81, 0x41, 0x9d,
    0x82, 0xac, 0x80, 0x42, 0x84, 0x81, 0x45, 0x76,
    0x84, 0x60, 0x45, 0xf8, 0x81, 0x40, 0x84, 0x80,
    0xc0, 0x82, 0x89, 0x80, 0x43, 0x51, 0x81, 0x60,
    0x4e, 0x05, 0x80, 0x5d, 0xe6, 0x83,
};

static const uint8_t unicode_prop_Unified_Ideograph_table[42] = {
    0x60, 0x33, 0xff, 0x59, 0xbf, 0xbf, 0x60, 0x51,
    0xff, 0x60, 0x5a, 0x0d, 0x08, 0x00, 0x81, 0x89,
    0x00, 0x00, 0x09, 0x82, 0x61, 0x05, 0xd5, 0x60,
    0xa6, 0xdf, 0x9f, 0x50, 0x38, 0x86, 0x40, 0xdd,
    0x81, 0x56, 0x81, 0x8d, 0x5d, 0x30, 0x54, 0x1e,
    0x53, 0x4a,
};

static const uint8_t unicode_prop_Variation_Selector_table[13] = {
    0x58, 0x0a, 0x10, 0x80, 0x60, 0xe5, 0xef, 0x8f,
    0x6d, 0x02, 0xef, 0x40, 0xef,
};

static const uint8_t unicode_prop_White_Space_table[22] = {
    0x88, 0x84, 0x91, 0x80, 0xe3, 0x80, 0x99, 0x80,
    0x55, 0xde, 0x80, 0x49, 0x7e, 0x8a, 0x9c, 0x0c,
    0x80, 0xae, 0x80, 0x4f, 0x9f, 0x80,
};

static const uint8_t unicode_prop_Bidi_Mirrored_table[173] = {
    0xa7, 0x81, 0x91, 0x00, 0x80, 0x9b, 0x00, 0x80,
    0x9c, 0x00, 0x80, 0xac, 0x80, 0x8e, 0x80, 0x4e,
    0x7d, 0x83, 0x47, 0x5c, 0x81, 0x49, 0x9b, 0x81,
    0x89, 0x81, 0xb5, 0x81, 0x8d, 0x81, 0x40, 0xb0,
    0x80, 0x40, 0xbf, 0x1a, 0x2a, 0x02, 0x0a, 0x18,
    0x18, 0x00, 0x03, 0x88, 0x20, 0x80, 0x91, 0x23,
    0x88, 0x08, 0x00, 0x39, 0x9e, 0x0b, 0x20, 0x88,
    0x09, 0x92, 0x21, 0x88, 0x21, 0x0b, 0x97, 0x81,
    0x8f, 0x3b, 0x93, 0x0e, 0x81, 0x44, 0x3c, 0x8d,
    0xc9, 0x01, 0x18, 0x08, 0x14, 0x1c, 0x12, 0x8d,
    0x41, 0x92, 0x95, 0x0d, 0x80, 0x8d, 0x38, 0x35,
    0x10, 0x1c, 0x01, 0x0c, 0x18, 0x02, 0x09, 0x89,
    0x29, 0x81, 0x8b, 0x92, 0x03, 0x08, 0x00, 0x08,
    0x03, 0x21, 0x2a, 0x97, 0x81, 0x8a, 0x0b, 0x18,
    0x09, 0x0b, 0xaa, 0x0f, 0x80, 0xa7, 0x20, 0x00,
    0x14, 0x22, 0x18, 0x14, 0x00, 0x40, 0xff, 0x80,
    0x42, 0x02, 0x1a, 0x08, 0x81, 0x8d, 0x09, 0x89,
    0xaa, 0x87, 0x41, 0xaa, 0x89, 0x0f, 0x60, 0xce,
    0x3c, 0x2c, 0x81, 0x40, 0xa1, 0x81, 0x91, 0x00,
    0x80, 0x9b, 0x00, 0x80, 0x9c, 0x00, 0x00, 0x08,
    0x81, 0x60, 0xd7, 0x76, 0x80, 0xb8, 0x80, 0xb8,
    0x80, 0xb8, 0x80, 0xb8, 0x80,
};

static const uint8_t unicode_prop_Emoji_table[239] = {
    0xa2, 0x05, 0x04, 0x89, 0xee, 0x03, 0x80, 0x5f,
    0x8c, 0x80, 0x8b, 0x80, 0x40, 0xd7, 0x80, 0x95,
    0x80, 0xd9, 0x85, 0x8e, 0x81, 0x41, 0x6e, 0x81,
    0x8b, 0x80, 0x40, 0xa5, 0x80, 0x98, 0x8a, 0x1a,
    0x40, 0xc6, 0x80, 0x40, 0xe6, 0x81, 0x89, 0x80,
    0x88, 0x80, 0xb9, 0x18, 0x84, 0x88, 0x01, 0x01,
    0x09, 0x03, 0x01, 0x00, 0x09, 0x02, 0x02, 0x0f,
    0x14, 0x00, 0x04, 0x8b, 0x8a, 0x09, 0x00, 0x08,
    0x80, 0x91, 0x01, 0x81, 0x91, 0x28, 0x00, 0x0a,
    0x0c, 0x01, 0x0b, 0x81, 0x8a, 0x0c, 0x09, 0x04,
    0x08, 0x00, 0x81, 0x93, 0x0c, 0x28, 0x19, 0x03,
    0x01, 0x01, 0x28, 0x01, 0x00, 0x00, 0x05, 0x02,
    0x05, 0x80, 0x89, 0x81, 0x8e, 0x01, 0x03, 0x00,
    0x03, 0x10, 0x80, 0x8a, 0x81, 0xaf, 0x82, 0x88,
    0x80, 0x8d, 0x80, 0x8d, 0x80, 0x41, 0x73, 0x81,
    0x41, 0xce, 0x82, 0x92, 0x81, 0xb2, 0x03, 0x80,
    0x44, 0xd9, 0x80, 0x8b, 0x80, 0x42, 0x58, 0x00,
    0x80, 0x61, 0xbd, 0x69, 0x80, 0x40, 0xc9, 0x80,
    0x40, 0x9f, 0x81, 0x8b, 0x81, 0x8d, 0x01, 0x89,
    0xca, 0x99, 0x01, 0x96, 0x80, 0x93, 0x01, 0x88,
    0x94, 0x81, 0x40, 0xad, 0xa1, 0x81, 0xef, 0x09,
    0x02, 0x81, 0xd2, 0x0a, 0x80, 0x41, 0x06, 0x80,
    0xbe, 0x8a, 0x28, 0x97, 0x31, 0x0f, 0x8b, 0x01,
    0x19, 0x03, 0x81, 0x8c, 0x09, 0x07, 0x81, 0x88,
    0x04, 0x82, 0x8b, 0x17, 0x11, 0x00, 0x03, 0x05,
    0x02, 0x05, 0xd5, 0xaf, 0xc5, 0x27, 0x0a, 0x84,
    0x88, 0x10, 0x01, 0x10, 0x81, 0x89, 0x40, 0xe2,
    0x8b, 0x18, 0x41, 0x1a, 0xae, 0x80, 0x89, 0x80,
    0x40, 0xb8, 0xef, 0x22, 0x22, 0x86, 0x88, 0x9c,
    0x82, 0x8a, 0x25, 0x89, 0x89, 0x2f, 0x3e,
};

static const uint8_t unicode_prop_Emoji_Component_table[28] = {
    0xa2, 0x05, 0x04, 0x89, 0x5f, 0xd2, 0x80, 0x40,
    0xd4, 0x80, 0x60, 0xdd, 0x2a, 0x80, 0x60, 0xf3,
    0xd5, 0x99, 0x41, 0xfa, 0x84, 0x45, 0xaf, 0x83,
    0x6c, 0x06, 0x6b, 0xdf,
};

static const uint8_t unicode_prop_Emoji_Modifier_table[4] = {
    0x61, 0xf3, 0xfa, 0x84,
};

static const uint8_t unicode_prop_Emoji_Modifier_Base_table[71] = {
    0x60, 0x26, 0x1c, 0x80, 0x40, 0xda, 0x80, 0x8f,
    0x83, 0x61, 0xcc, 0x76, 0x80, 0xbb, 0x11, 0x01,
    0x82, 0xf4, 0x09, 0x8a, 0x94, 0x92, 0x10, 0x1a,
    0x02, 0x30, 0x00, 0x97, 0x80, 0x40, 0xc8, 0x0b,
    0x80, 0x94, 0x03, 0x81, 0x40, 0xad, 0x12, 0x84,
    0xd2, 0x80, 0x8f, 0x82, 0x88, 0x80, 0x8a, 0x80,
    0x42, 0x3e, 0x01, 0x07, 0x3d, 0x80, 0x88, 0x89,
    0x0a, 0xb7, 0x80, 0xbc, 0x08, 0x08, 0x80, 0x90,
    0x10, 0x8c, 0x40, 0xe4, 0x82, 0xa9, 0x86,
};

static const uint8_t unicode_prop_Emoji_Presentation_table[145] = {
    0x60, 0x23, 0x19, 0x81, 0x40, 0xcc, 0x1a, 0x01,
    0x80, 0x42, 0x08, 0x81, 0x94, 0x81, 0xb1, 0x8b,
    0xaa, 0x80, 0x92, 0x80, 0x8c, 0x07, 0x81, 0x90,
    0x0c, 0x0f, 0x04, 0x80, 0x94, 0x06, 0x08, 0x03,
    0x01, 0x06, 0x03, 0x81, 0x9b, 0x80, 0xa2, 0x00,
    0x03, 0x10, 0x80, 0xbc, 0x82, 0x97, 0x80, 0x8d,
    0x80, 0x43, 0x5a, 0x81, 0xb2, 0x03, 0x80, 0x61,
    0xc4, 0xad, 0x80, 0x40, 0xc9, 0x80, 0x40, 0xbd,
    0x01, 0x89, 0xca, 0x99, 0x00, 0x97, 0x80, 0x93,
    0x01, 0x20, 0x82, 0x94, 0x81, 0x40, 0xad, 0xa0,
    0x8b, 0x88, 0x80, 0xc5, 0x80, 0x95, 0x8b, 0xaa,
    0x1c, 0x8b, 0x90, 0x10, 0x82, 0xc6, 0x00, 0x80,
    0x40, 0xba, 0x81, 0xbe, 0x8c, 0x18, 0x97, 0x91,
    0x80, 0x99, 0x81, 0x8c, 0x80, 0xd5, 0xd4, 0xaf,
    0xc5, 0x28, 0x12, 0x0a, 0x22, 0x8a, 0x0e, 0x88,
    0x40, 0xe2, 0x8b, 0x18, 0x41, 0x1a, 0xae, 0x80,
    0x89, 0x80, 0x40, 0xb8, 0xef, 0x22, 0x22, 0x86,
    0x88, 0x9c, 0x82, 0x8a, 0x25, 0x89, 0x89, 0x2f,
    0x3e,
};

static const uint8_t unicode_prop_Extended_Pictographic_table[156] = {
    0x40, 0xa8, 0x03, 0x80, 0x5f, 0x8c, 0x80, 0x8b,
    0x80, 0x40, 0xd7, 0x80, 0x95, 0x80, 0xd9, 0x85,
    0x8e, 0x81, 0x41, 0x6e, 0x81, 0x8b, 0x80, 0xde,
    0x80, 0xc5, 0x80, 0x98, 0x8a, 0x1a, 0x40, 0xc6,
    0x80, 0x40, 0xe6, 0x81, 0x89, 0x80, 0x88, 0x80,
    0xb9, 0x18, 0x28, 0x8b, 0x80, 0xf1, 0x89, 0xf5,
    0x81, 0x8a, 0x00, 0x00, 0x28, 0x10, 0x28, 0x89,
    0x81, 0x8e, 0x01, 0x03, 0x00, 0x03, 0x10, 0x80,
    0x8a, 0x84, 0xac, 0x82, 0x88, 0x80, 0x8d, 0x80,
    0x8d, 0x80, 0x41, 0x73, 0x81, 0x41, 0xce, 0x82,
    0x92, 0x81, 0xb2, 0x03, 0x80, 0x44, 0xd9, 0x80,
    0x8b, 0x80, 0x42, 0x58, 0x00, 0x80, 0x61, 0xbd,
    0x65, 0x40, 0xff, 0x8c, 0x82, 0x9e, 0x80, 0xbb,
    0x85, 0x8b, 0x81, 0x8d, 0x01, 0x89, 0x91, 0xb8,
    0x9a, 0x8e, 0x89, 0x80, 0x93, 0x01, 0x88, 0x03,
    0x88, 0x41, 0xb1, 0x84, 0x41, 0x3d, 0x87, 0x41,
    0x09, 0xaf, 0xff, 0xf3, 0x8b, 0xd4, 0xaa, 0x8b,
    0x83, 0xb7, 0x87, 0x89, 0x85, 0xa7, 0x87, 0x9d,
    0xd1, 0x8b, 0xae, 0x80, 0x89, 0x80, 0x41, 0xb8,
    0x40, 0xff, 0x43, 0xfd,
};

static const uint8_t unicode_prop_Default_Ignorable_Code_Point_table[51] = {
    0x40, 0xac, 0x80, 0x42, 0xa0, 0x80, 0x42, 0xcb,
    0x80, 0x4b, 0x41, 0x81, 0x46, 0x52, 0x81, 0xd4,
    0x84, 0x47, 0xfa, 0x84, 0x99, 0x84, 0xb0, 0x8f,
    0x50, 0xf3, 0x80, 0x60, 0xcc, 0x9a, 0x8f, 0x40,
    0xee, 0x80, 0x40, 0x9f, 0x80, 0xce, 0x88, 0x60,
    0xbc, 0xa6, 0x83, 0x54, 0xce, 0x87, 0x6c, 0x2e,
    0x84, 0x4f, 0xff,
};

typedef enum {
    UNICODE_PROP_Hyphen,
    UNICODE_PROP_Other_Math,
    UNICODE_PROP_Other_Alphabetic,
    UNICODE_PROP_Other_Lowercase,
    UNICODE_PROP_Other_Uppercase,
    UNICODE_PROP_Other_Grapheme_Extend,
    UNICODE_PROP_Other_Default_Ignorable_Code_Point,
    UNICODE_PROP_Other_ID_Start,
    UNICODE_PROP_Other_ID_Continue,
    UNICODE_PROP_Prepended_Concatenation_Mark,
    UNICODE_PROP_ID_Continue1,
    UNICODE_PROP_XID_Start1,
    UNICODE_PROP_XID_Continue1,
    UNICODE_PROP_Changes_When_Titlecased1,
    UNICODE_PROP_Changes_When_Casefolded1,
    UNICODE_PROP_Changes_When_NFKC_Casefolded1,
    UNICODE_PROP_ASCII_Hex_Digit,
    UNICODE_PROP_Bidi_Control,
    UNICODE_PROP_Dash,
    UNICODE_PROP_Deprecated,
    UNICODE_PROP_Diacritic,
    UNICODE_PROP_Extender,
    UNICODE_PROP_Hex_Digit,
    UNICODE_PROP_IDS_Binary_Operator,
    UNICODE_PROP_IDS_Trinary_Operator,
    UNICODE_PROP_Ideographic,
    UNICODE_PROP_Join_Control,
    UNICODE_PROP_Logical_Order_Exception,
    UNICODE_PROP_Noncharacter_Code_Point,
    UNICODE_PROP_Pattern_Syntax,
    UNICODE_PROP_Pattern_White_Space,
    UNICODE_PROP_Quotation_Mark,
    UNICODE_PROP_Radical,
    UNICODE_PROP_Regional_Indicator,
    UNICODE_PROP_Sentence_Terminal,
    UNICODE_PROP_Soft_Dotted,
    UNICODE_PROP_Terminal_Punctuation,
    UNICODE_PROP_Unified_Ideograph,
    UNICODE_PROP_Variation_Selector,
    UNICODE_PROP_White_Space,
    UNICODE_PROP_Bidi_Mirrored,
    UNICODE_PROP_Emoji,
    UNICODE_PROP_Emoji_Component,
    UNICODE_PROP_Emoji_Modifier,
    UNICODE_PROP_Emoji_Modifier_Base,
    UNICODE_PROP_Emoji_Presentation,
    UNICODE_PROP_Extended_Pictographic,
    UNICODE_PROP_Default_Ignorable_Code_Point,
    UNICODE_PROP_ID_Start,
    UNICODE_PROP_Case_Ignorable,
    UNICODE_PROP_ASCII,
    UNICODE_PROP_Alphabetic,
    UNICODE_PROP_Any,
    UNICODE_PROP_Assigned,
    UNICODE_PROP_Cased,
    UNICODE_PROP_Changes_When_Casefolded,
    UNICODE_PROP_Changes_When_Casemapped,
    UNICODE_PROP_Changes_When_Lowercased,
    UNICODE_PROP_Changes_When_NFKC_Casefolded,
    UNICODE_PROP_Changes_When_Titlecased,
    UNICODE_PROP_Changes_When_Uppercased,
    UNICODE_PROP_Grapheme_Base,
    UNICODE_PROP_Grapheme_Extend,
    UNICODE_PROP_ID_Continue,
    UNICODE_PROP_Lowercase,
    UNICODE_PROP_Math,
    UNICODE_PROP_Uppercase,
    UNICODE_PROP_XID_Continue,
    UNICODE_PROP_XID_Start,
    UNICODE_PROP_Cased1,
    UNICODE_PROP_COUNT,
} UnicodePropertyEnum;

static const char unicode_prop_name_table[] =
    "ASCII_Hex_Digit,AHex"               "\0"
    "Bidi_Control,Bidi_C"                "\0"
    "Dash"                               "\0"
    "Deprecated,Dep"                     "\0"
    "Diacritic,Dia"                      "\0"
    "Extender,Ext"                       "\0"
    "Hex_Digit,Hex"                      "\0"
    "IDS_Binary_Operator,IDSB"           "\0"
    "IDS_Trinary_Operator,IDST"          "\0"
    "Ideographic,Ideo"                   "\0"
    "Join_Control,Join_C"                "\0"
    "Logical_Order_Exception,LOE"        "\0"
    "Noncharacter_Code_Point,NChar"      "\0"
    "Pattern_Syntax,Pat_Syn"             "\0"
    "Pattern_White_Space,Pat_WS"         "\0"
    "Quotation_Mark,QMark"               "\0"
    "Radical"                            "\0"
    "Regional_Indicator,RI"              "\0"
    "Sentence_Terminal,STerm"            "\0"
    "Soft_Dotted,SD"                     "\0"
    "Terminal_Punctuation,Term"          "\0"
    "Unified_Ideograph,UIdeo"            "\0"
    "Variation_Selector,VS"              "\0"
    "White_Space,space"                  "\0"
    "Bidi_Mirrored,Bidi_M"               "\0"
    "Emoji"                              "\0"
    "Emoji_Component,EComp"              "\0"
    "Emoji_Modifier,EMod"                "\0"
    "Emoji_Modifier_Base,EBase"          "\0"
    "Emoji_Presentation,EPres"           "\0"
    "Extended_Pictographic,ExtPict"      "\0"
    "Default_Ignorable_Code_Point,DI"    "\0"
    "ID_Start,IDS"                       "\0"
    "Case_Ignorable,CI"                  "\0"
    "ASCII"                              "\0"
    "Alphabetic,Alpha"                   "\0"
    "Any"                                "\0"
    "Assigned"                           "\0"
    "Cased"                              "\0"
    "Changes_When_Casefolded,CWCF"       "\0"
    "Changes_When_Casemapped,CWCM"       "\0"
    "Changes_When_Lowercased,CWL"        "\0"
    "Changes_When_NFKC_Casefolded,CWKCF" "\0"
    "Changes_When_Titlecased,CWT"        "\0"
    "Changes_When_Uppercased,CWU"        "\0"
    "Grapheme_Base,Gr_Base"              "\0"
    "Grapheme_Extend,Gr_Ext"             "\0"
    "ID_Continue,IDC"                    "\0"
    "Lowercase,Lower"                    "\0"
    "Math"                               "\0"
    "Uppercase,Upper"                    "\0"
    "XID_Continue,XIDC"                  "\0"
    "XID_Start,XIDS"                     "\0"
;

static const uint8_t * const unicode_prop_table[] = {
    unicode_prop_Hyphen_table,
    unicode_prop_Other_Math_table,
    unicode_prop_Other_Alphabetic_table,
    unicode_prop_Other_Lowercase_table,
    unicode_prop_Other_Uppercase_table,
    unicode_prop_Other_Grapheme_Extend_table,
    unicode_prop_Other_Default_Ignorable_Code_Point_table,
    unicode_prop_Other_ID_Start_table,
    unicode_prop_Other_ID_Continue_table,
    unicode_prop_Prepended_Concatenation_Mark_table,
    unicode_prop_ID_Continue1_table,
    unicode_prop_XID_Start1_table,
    unicode_prop_XID_Continue1_table,
    unicode_prop_Changes_When_Titlecased1_table,
    unicode_prop_Changes_When_Casefolded1_table,
    unicode_prop_Changes_When_NFKC_Casefolded1_table,
    unicode_prop_ASCII_Hex_Digit_table,
    unicode_prop_Bidi_Control_table,
    unicode_prop_Dash_table,
    unicode_prop_Deprecated_table,
    unicode_prop_Diacritic_table,
    unicode_prop_Extender_table,
    unicode_prop_Hex_Digit_table,
    unicode_prop_IDS_Binary_Operator_table,
    unicode_prop_IDS_Trinary_Operator_table,
    unicode_prop_Ideographic_table,
    unicode_prop_Join_Control_table,
    unicode_prop_Logical_Order_Exception_table,
    unicode_prop_Noncharacter_Code_Point_table,
    unicode_prop_Pattern_Syntax_table,
    unicode_prop_Pattern_White_Space_table,
    unicode_prop_Quotation_Mark_table,
    unicode_prop_Radical_table,
    unicode_prop_Regional_Indicator_table,
    unicode_prop_Sentence_Terminal_table,
    unicode_prop_Soft_Dotted_table,
    unicode_prop_Terminal_Punctuation_table,
    unicode_prop_Unified_Ideograph_table,
    unicode_prop_Variation_Selector_table,
    unicode_prop_White_Space_table,
    unicode_prop_Bidi_Mirrored_table,
    unicode_prop_Emoji_table,
    unicode_prop_Emoji_Component_table,
    unicode_prop_Emoji_Modifier_table,
    unicode_prop_Emoji_Modifier_Base_table,
    unicode_prop_Emoji_Presentation_table,
    unicode_prop_Extended_Pictographic_table,
    unicode_prop_Default_Ignorable_Code_Point_table,
    unicode_prop_ID_Start_table,
    unicode_prop_Case_Ignorable_table,
};

static const uint16_t unicode_prop_len_table[] = {
    countof(unicode_prop_Hyphen_table),
    countof(unicode_prop_Other_Math_table),
    countof(unicode_prop_Other_Alphabetic_table),
    countof(unicode_prop_Other_Lowercase_table),
    countof(unicode_prop_Other_Uppercase_table),
    countof(unicode_prop_Other_Grapheme_Extend_table),
    countof(unicode_prop_Other_Default_Ignorable_Code_Point_table),
    countof(unicode_prop_Other_ID_Start_table),
    countof(unicode_prop_Other_ID_Continue_table),
    countof(unicode_prop_Prepended_Concatenation_Mark_table),
    countof(unicode_prop_ID_Continue1_table),
    countof(unicode_prop_XID_Start1_table),
    countof(unicode_prop_XID_Continue1_table),
    countof(unicode_prop_Changes_When_Titlecased1_table),
    countof(unicode_prop_Changes_When_Casefolded1_table),
    countof(unicode_prop_Changes_When_NFKC_Casefolded1_table),
    countof(unicode_prop_ASCII_Hex_Digit_table),
    countof(unicode_prop_Bidi_Control_table),
    countof(unicode_prop_Dash_table),
    countof(unicode_prop_Deprecated_table),
    countof(unicode_prop_Diacritic_table),
    countof(unicode_prop_Extender_table),
    countof(unicode_prop_Hex_Digit_table),
    countof(unicode_prop_IDS_Binary_Operator_table),
    countof(unicode_prop_IDS_Trinary_Operator_table),
    countof(unicode_prop_Ideographic_table),
    countof(unicode_prop_Join_Control_table),
    countof(unicode_prop_Logical_Order_Exception_table),
    countof(unicode_prop_Noncharacter_Code_Point_table),
    countof(unicode_prop_Pattern_Syntax_table),
    countof(unicode_prop_Pattern_White_Space_table),
    countof(unicode_prop_Quotation_Mark_table),
    countof(unicode_prop_Radical_table),
    countof(unicode_prop_Regional_Indicator_table),
    countof(unicode_prop_Sentence_Terminal_table),
    countof(unicode_prop_Soft_Dotted_table),
    countof(unicode_prop_Terminal_Punctuation_table),
    countof(unicode_prop_Unified_Ideograph_table),
    countof(unicode_prop_Variation_Selector_table),
    countof(unicode_prop_White_Space_table),
    countof(unicode_prop_Bidi_Mirrored_table),
    countof(unicode_prop_Emoji_table),
    countof(unicode_prop_Emoji_Component_table),
    countof(unicode_prop_Emoji_Modifier_table),
    countof(unicode_prop_Emoji_Modifier_Base_table),
    countof(unicode_prop_Emoji_Presentation_table),
    countof(unicode_prop_Extended_Pictographic_table),
    countof(unicode_prop_Default_Ignorable_Code_Point_table),
    countof(unicode_prop_ID_Start_table),
    countof(unicode_prop_Case_Ignorable_table),
};

#endif /* CONFIG_ALL_UNICODE */


/*
  TODO:

  - Add full unicode canonicalize rules for character ranges (not
    really useful but needed for exact "ignorecase" compatibility).

  - Add a lock step execution mode (=linear time execution guaranteed)
    when the regular expression is "simple" i.e. no backreference nor
    complicated lookahead. The opcodes are designed for this execution
    model.
*/

#define LIBUNICODE_OPCODES(X) \
  X(invalid, 1) /* never used */ \
  X(char, 3) \
  X(char32, 5) \
  X(dot, 1) \
  X(any, 1) /* same as dot but match any character including line terminator */ \
  X(line_start, 1) \
  X(line_end, 1) \
  X(goto, 5) \
  X(split_goto_first, 5) \
  X(split_next_first, 5) \
  X(match, 1) \
  X(save_start, 2) /* save start position */ \
  X(save_end, 2) /* save end position, must come after saved_start */ \
  X(save_reset, 3) /* reset save positions */ \
  X(loop, 5) /* decrement the top the stack and goto if != 0 */ \
  X(push_i32, 5) /* push integer on the stack */ \
  X(drop, 1) \
  X(word_boundary, 1) \
  X(not_word_boundary, 1) \
  X(back_reference, 2) \
  X(backward_back_reference, 2) /* must come after back_reference */ \
  X(range, 3) /* variable length */ \
  X(range32, 3) /* variable length */ \
  X(lookahead, 5) \
  X(negative_lookahead, 5) \
  X(push_char_pos, 1) /* push the character position on the stack */ \
  X(bne_char_pos, 5) /* pop one stack element and jump if equal to the character \
   position */ \
  X(prev, 1) /* go to the previous char */ \
  X(simple_greedy_quant, 17) \

typedef enum {
#define DEF(id, size) REOP_ ## id,
LIBUNICODE_OPCODES (DEF)
#undef DEF
    REOP_COUNT,
} REOPCodeEnum;

static constexpr size_t CAPTURE_COUNT_MAX = 255;
static constexpr size_t STACK_SIZE_MAX = 255;

/* unicode code points */
static constexpr uint32_t CP_LS = 0x2028;
static constexpr uint32_t CP_PS = 0x2029;

static constexpr size_t TMP_BUF_SIZE = 128;

typedef struct {
    DynBuf byte_code;
    const uint8_t *buf_ptr;
    const uint8_t *buf_end;
    const uint8_t *buf_start;
    int re_flags;
    BOOL is_utf16;
    BOOL ignore_case;
    BOOL dotall;
    int capture_count;
    int total_capture_count; /* -1 = not computed yet */
    int has_named_captures; /* -1 = don't know, 0 = no, 1 = yes */
    void *opaque;
    DynBuf group_names;
    union {
        char error_msg[TMP_BUF_SIZE];
        char tmp_buf[TMP_BUF_SIZE];
    } u;
} REParseState;

typedef struct {
#ifdef DUMP_REOP
    const char *name;
#endif
    uint8_t size;
} REOpCode;

static const REOpCode reopcode_info[REOP_COUNT] = {
#ifdef DUMP_REOP
#define DEF(id, size) { #id, size },
#else
#define DEF(id, size) { size },
#endif
LIBUNICODE_OPCODES(DEF)
#undef DEF
};

enum
{
    RE_HEADER_FLAGS         = 0,
    RE_HEADER_CAPTURE_COUNT = 1,
    RE_HEADER_STACK_SIZE    = 2,
    RE_HEADER_LEN           = 7
};

static inline int is_digit(int c) {
    return c >= '0' && c <= '9';
}

/* insert 'len' bytes at position 'pos'. Return < 0 if error. */
static int dbuf_insert(DynBuf *s, int pos, int len)
{
    if (dbuf_realloc(s, s->size + len))
        return -1;
    memmove(s->buf + pos + len, s->buf + pos, s->size - pos);
    s->size += len;
    return 0;
}

/* canonicalize with the specific JS regexp rules */
static uint32_t lre_canonicalize(uint32_t c, BOOL is_utf16)
{
    uint32_t res[LRE_CC_RES_LEN_MAX];
    int len;
    if (is_utf16) {
        if (js_likely(c < 128)) {
            if (c >= 'A' && c <= 'Z')
                c = c - 'A' + 'a';
        } else {
            lre_case_conv(res, c, 2);
            c = res[0];
        }
    } else {
        if (js_likely(c < 128)) {
            if (c >= 'a' && c <= 'z')
                c = c - 'a' + 'A';
        } else {
            /* legacy regexp: to upper case if single char >= 128 */
            len = lre_case_conv(res, c, FALSE);
            if (len == 1 && res[0] >= 128)
                c = res[0];
        }
    }
    return c;
}

static const uint16_t char_range_d[] = {
    1,
    0x0030, 0x0039 + 1,
};

/* code point ranges for Zs,Zl or Zp property */
static const uint16_t char_range_s[] = {
    10,
    0x0009, 0x000D + 1,
    0x0020, 0x0020 + 1,
    0x00A0, 0x00A0 + 1,
    0x1680, 0x1680 + 1,
    0x2000, 0x200A + 1,
    /* 2028;LINE SEPARATOR;Zl;0;WS;;;;;N;;;;; */
    /* 2029;PARAGRAPH SEPARATOR;Zp;0;B;;;;;N;;;;; */
    0x2028, 0x2029 + 1,
    0x202F, 0x202F + 1,
    0x205F, 0x205F + 1,
    0x3000, 0x3000 + 1,
    /* FEFF;ZERO WIDTH NO-BREAK SPACE;Cf;0;BN;;;;;N;BYTE ORDER MARK;;;; */
    0xFEFF, 0xFEFF + 1,
};

inline BOOL lre_is_space(int c)
{
    int i, n, low, high;
    n = (countof(char_range_s) - 1) / 2;
    for(i = 0; i < n; i++) {
        low = char_range_s[2 * i + 1];
        if (c < low)
            return FALSE;
        high = char_range_s[2 * i + 2];
        if (c < high)
            return TRUE;
    }
    return FALSE;
}

inline uint32_t const lre_id_start_table_ascii[4] = {
    /* $ A-Z _ a-z */
    0x00000000, 0x00000010, 0x87FFFFFE, 0x07FFFFFE
};

inline uint32_t const lre_id_continue_table_ascii[4] = {
    /* $ 0-9 A-Z _ a-z */
    0x00000000, 0x03FF0010, 0x87FFFFFE, 0x07FFFFFE
};


static const uint16_t char_range_w[] = {
    4,
    0x0030, 0x0039 + 1,
    0x0041, 0x005A + 1,
    0x005F, 0x005F + 1,
    0x0061, 0x007A + 1,
};

static constexpr uint32_t CLASS_RANGE_BASE = 0x40000000;

typedef enum {
    CHAR_RANGE_d,
    CHAR_RANGE_D,
    CHAR_RANGE_s,
    CHAR_RANGE_S,
    CHAR_RANGE_w,
    CHAR_RANGE_W,
} CharRangeEnum;

static const uint16_t *char_range_table[] = {
    char_range_d,
    char_range_s,
    char_range_w,
};

static int cr_init_char_range(REParseState *s, CharRange *cr, uint32_t c)
{
    BOOL invert;
    const uint16_t *c_pt;
    int len, i;

    invert = c & 1;
    c_pt = char_range_table[c >> 1];
    len = *c_pt++;
    cr_init(cr, s->opaque, lre_realloc);
    for(i = 0; i < len * 2; i++) {
        if (cr_add_point(cr, c_pt[i]))
            goto fail;
    }
    if (invert) {
        if (cr_invert(cr))
            goto fail;
    }
    return 0;
 fail:
    cr_free(cr);
    return -1;
}

static int cr_canonicalize(CharRange *cr)
{
    CharRange a;
    uint32_t pt[2];
    int i, ret;

    cr_init(&a, cr->mem_opaque, lre_realloc);
    pt[0] = 'a';
    pt[1] = 'z' + 1;
    ret = cr_op(&a, cr->points, cr->len, pt, 2, CR_OP_INTER);
    if (ret)
        goto fail;
    /* convert to upper case */
    /* XXX: the generic unicode case would be much more complicated
       and not really useful */
    for(i = 0; i < a.len; i++) {
        a.points[i] += 'A' - 'a';
    }
    /* Note: for simplicity we keep the lower case ranges */
    ret = cr_union1(cr, a.points, a.len);
 fail:
    cr_free(&a);
    return ret;
}

#ifdef DUMP_REOP
static void lre_dump_bytecode(const uint8_t *buf, int buf_len)
{
    int pos, len, opcode, bc_len, re_flags, i;
    uint32_t val;

    assert(buf_len >= RE_HEADER_LEN);

    re_flags=  buf[0];
    bc_len = get_u32(buf + 3);
    assert(bc_len + RE_HEADER_LEN <= buf_len);
    printf("flags: 0x%x capture_count=%d stack_size=%d\n",
           re_flags, buf[1], buf[2]);
    if (re_flags & LRE_FLAG_NAMED_GROUPS) {
        const char *p;
        p = (char *)buf + RE_HEADER_LEN + bc_len;
        printf("named groups: ");
        for(i = 1; i < buf[1]; i++) {
            if (i != 1)
                printf(",");
            printf("<%s>", p);
            p += strlen(p) + 1;
        }
        printf("\n");
        assert(p == (char *)(buf + buf_len));
    }
    printf("bytecode_len=%d\n", bc_len);

    buf += RE_HEADER_LEN;
    pos = 0;
    while (pos < bc_len) {
        printf("%5u: ", pos);
        opcode = buf[pos];
        len = reopcode_info[opcode].size;
        if (opcode >= REOP_COUNT) {
            printf(" invalid opcode=0x%02x\n", opcode);
            break;
        }
        if ((pos + len) > bc_len) {
            printf(" buffer overflow (opcode=0x%02x)\n", opcode);
            break;
        }
        printf("%s", reopcode_info[opcode].name);
        switch(opcode) {
        case REOP_char:
            val = get_u16(buf + pos + 1);
            if (val >= ' ' && val <= 126)
                printf(" '%c'", val);
            else
                printf(" 0x%04x", val);
            break;
        case REOP_char32:
            val = get_u32(buf + pos + 1);
            if (val >= ' ' && val <= 126)
                printf(" '%c'", val);
            else
                printf(" 0x%08x", val);
            break;
        case REOP_goto:
        case REOP_split_goto_first:
        case REOP_split_next_first:
        case REOP_loop:
        case REOP_lookahead:
        case REOP_negative_lookahead:
        case REOP_bne_char_pos:
            val = get_u32(buf + pos + 1);
            val += (pos + 5);
            printf(" %u", val);
            break;
        case REOP_simple_greedy_quant:
            printf(" %u %u %u %u",
                   get_u32(buf + pos + 1) + (pos + 17),
                   get_u32(buf + pos + 1 + 4),
                   get_u32(buf + pos + 1 + 8),
                   get_u32(buf + pos + 1 + 12));
            break;
        case REOP_save_start:
        case REOP_save_end:
        case REOP_back_reference:
        case REOP_backward_back_reference:
            printf(" %u", buf[pos + 1]);
            break;
        case REOP_save_reset:
            printf(" %u %u", buf[pos + 1], buf[pos + 2]);
            break;
        case REOP_push_i32:
            val = get_u32(buf + pos + 1);
            printf(" %d", val);
            break;
        case REOP_range:
            {
                int n, i;
                n = get_u16(buf + pos + 1);
                len += n * 4;
                for(i = 0; i < n * 2; i++) {
                    val = get_u16(buf + pos + 3 + i * 2);
                    printf(" 0x%04x", val);
                }
            }
            break;
        case REOP_range32:
            {
                int n, i;
                n = get_u16(buf + pos + 1);
                len += n * 8;
                for(i = 0; i < n * 2; i++) {
                    val = get_u32(buf + pos + 3 + i * 4);
                    printf(" 0x%08x", val);
                }
            }
            break;
        default:
            break;
        }
        printf("\n");
        pos += len;
    }
}
#endif

static void re_emit_op(REParseState *s, int op)
{
    dbuf_putc(&s->byte_code, op);
}

/* return the offset of the u32 value */
static int re_emit_op_u32(REParseState *s, int op, uint32_t val)
{
    int pos;
    dbuf_putc(&s->byte_code, op);
    pos = s->byte_code.size;
    dbuf_put_u32(&s->byte_code, val);
    return pos;
}

static int re_emit_goto(REParseState *s, int op, uint32_t val)
{
    int pos;
    dbuf_putc(&s->byte_code, op);
    pos = s->byte_code.size;
    dbuf_put_u32(&s->byte_code, val - (pos + 4));
    return pos;
}

static void re_emit_op_u8(REParseState *s, int op, uint32_t val)
{
    dbuf_putc(&s->byte_code, op);
    dbuf_putc(&s->byte_code, val);
}

static void re_emit_op_u16(REParseState *s, int op, uint32_t val)
{
    dbuf_putc(&s->byte_code, op);
    dbuf_put_u16(&s->byte_code, val);
}

static int re_parse_error(REParseState *s, const char *fmt, ...)
{
    va_list ap;
    va_start(ap, fmt);
    vsnprintf(s->u.error_msg, sizeof(s->u.error_msg), fmt, ap);
    va_end(ap);
    return -1;
}

static int re_parse_out_of_memory(REParseState *s)
{
    return re_parse_error(s, "out of memory");
}

/* If allow_overflow is false, return -1 in case of
   overflow. Otherwise return INT32_MAX. */
static int parse_digits(const uint8_t **pp, BOOL allow_overflow)
{
    const uint8_t *p;
    uint64_t v;
    int c;

    p = *pp;
    v = 0;
    for(;;) {
        c = *p;
        if (c < '0' || c > '9')
            break;
        v = v * 10 + c - '0';
        if (v >= INT32_MAX) {
            if (allow_overflow)
                v = INT32_MAX;
            else
                return -1;
        }
        p++;
    }
    *pp = p;
    return v;
}

static int re_parse_expect(REParseState *s, const uint8_t **pp, int c)
{
    const uint8_t *p;
    p = *pp;
    if (*p != c)
        return re_parse_error(s, "expecting '%c'", c);
    p++;
    *pp = p;
    return 0;
}

/* Parse an escape sequence, *pp points after the '\':
   allow_utf16 value:
   0 : no UTF-16 escapes allowed
   1 : UTF-16 escapes allowed
   2 : UTF-16 escapes allowed and escapes of surrogate pairs are
   converted to a unicode character (unicode regexp case).

   Return the unicode char and update *pp if recognized,
   return -1 if malformed escape,
   return -2 otherwise. */
inline int lre_parse_escape(const uint8_t **pp, int allow_utf16)
{
    const uint8_t *p;
    uint32_t c;

    p = *pp;
    c = *p++;
    switch(c) {
    case 'b':
        c = '\b';
        break;
    case 'f':
        c = '\f';
        break;
    case 'n':
        c = '\n';
        break;
    case 'r':
        c = '\r';
        break;
    case 't':
        c = '\t';
        break;
    case 'v':
        c = '\v';
        break;
    case 'x':
    case 'u':
        {
            int h, n, i;
            uint32_t c1;

            if (*p == '{' && allow_utf16) {
                p++;
                c = 0;
                for(;;) {
                    h = from_hex(*p++);
                    if (h < 0)
                        return -1;
                    c = (c << 4) | h;
                    if (c > 0x10FFFF)
                        return -1;
                    if (*p == '}')
                        break;
                }
                p++;
            } else {
                if (c == 'x') {
                    n = 2;
                } else {
                    n = 4;
                }

                c = 0;
                for(i = 0; i < n; i++) {
                    h = from_hex(*p++);
                    if (h < 0) {
                        return -1;
                    }
                    c = (c << 4) | h;
                }
                if (c >= 0xd800 && c < 0xdc00 &&
                    allow_utf16 == 2 && p[0] == '\\' && p[1] == 'u') {
                    /* convert an escaped surrogate pair into a
                       unicode char */
                    c1 = 0;
                    for(i = 0; i < 4; i++) {
                        h = from_hex(p[2 + i]);
                        if (h < 0)
                            break;
                        c1 = (c1 << 4) | h;
                    }
                    if (i == 4 && c1 >= 0xdc00 && c1 < 0xe000) {
                        p += 6;
                        c = (((c & 0x3ff) << 10) | (c1 & 0x3ff)) + 0x10000;
                    }
                }
            }
        }
        break;
    case '0': case '1': case '2': case '3':
    case '4': case '5': case '6': case '7':
        c -= '0';
        if (allow_utf16 == 2) {
            /* only accept \0 not followed by digit */
            if (c != 0 || is_digit(*p))
                return -1;
        } else {
            /* parse a legacy octal sequence */
            uint32_t v;
            v = *p - '0';
            if (v > 7)
                break;
            c = (c << 3) | v;
            p++;
            if (c >= 32)
                break;
            v = *p - '0';
            if (v > 7)
                break;
            c = (c << 3) | v;
            p++;
        }
        break;
    default:
        return -2;
    }
    *pp = p;
    return c;
}

#ifdef CONFIG_ALL_UNICODE
/* XXX: we use the same chars for name and value */
static BOOL is_unicode_char(int c)
{
    return ((c >= '0' && c <= '9') ||
            (c >= 'A' && c <= 'Z') ||
            (c >= 'a' && c <= 'z') ||
            (c == '_'));
}

static int parse_unicode_property(REParseState *s, CharRange *cr,
                                  const uint8_t **pp, BOOL is_inv)
{
    const uint8_t *p;
    char name[64], value[64];
    char *q;
    BOOL script_ext;
    int ret;

    p = *pp;
    if (*p != '{')
        return re_parse_error(s, "expecting '{' after \\p");
    p++;
    q = name;
    while (is_unicode_char(*p)) {
        if ((q - name) >= sizeof(name) - 1)
            goto unknown_property_name;
        *q++ = *p++;
    }
    *q = '\0';
    q = value;
    if (*p == '=') {
        p++;
        while (is_unicode_char(*p)) {
            if ((q - value) >= sizeof(value) - 1)
                return re_parse_error(s, "unknown unicode property value");
            *q++ = *p++;
        }
    }
    *q = '\0';
    if (*p != '}')
        return re_parse_error(s, "expecting '}'");
    p++;
    //    printf("name=%s value=%s\n", name, value);

    if (!strcmp(name, "Script") || !strcmp(name, "sc")) {
        script_ext = FALSE;
        goto do_script;
    } else if (!strcmp(name, "Script_Extensions") || !strcmp(name, "scx")) {
        script_ext = TRUE;
    do_script:
        cr_init(cr, s->opaque, lre_realloc);
        ret = unicode_script(cr, value, script_ext);
        if (ret) {
            cr_free(cr);
            if (ret == -2)
                return re_parse_error(s, "unknown unicode script");
            else
                goto out_of_memory;
        }
    } else if (!strcmp(name, "General_Category") || !strcmp(name, "gc")) {
        cr_init(cr, s->opaque, lre_realloc);
        ret = unicode_general_category(cr, value);
        if (ret) {
            cr_free(cr);
            if (ret == -2)
                return re_parse_error(s, "unknown unicode general category");
            else
                goto out_of_memory;
        }
    } else if (value[0] == '\0') {
        cr_init(cr, s->opaque, lre_realloc);
        ret = unicode_general_category(cr, name);
        if (ret == -1) {
            cr_free(cr);
            goto out_of_memory;
        }
        if (ret < 0) {
            ret = unicode_prop(cr, name);
            if (ret) {
                cr_free(cr);
                if (ret == -2)
                    goto unknown_property_name;
                else
                    goto out_of_memory;
            }
        }
    } else {
    unknown_property_name:
        return re_parse_error(s, "unknown unicode property name");
    }

    if (is_inv) {
        if (cr_invert(cr)) {
            cr_free(cr);
            return -1;
        }
    }
    *pp = p;
    return 0;
 out_of_memory:
    return re_parse_out_of_memory(s);
}
#endif /* CONFIG_ALL_UNICODE */

/* return -1 if error otherwise the character or a class range
   (CLASS_RANGE_BASE). In case of class range, 'cr' is
   initialized. Otherwise, it is ignored. */
static int get_class_atom(REParseState *s, CharRange *cr,
                          const uint8_t **pp, BOOL inclass)
{
    const uint8_t *p;
    uint32_t c;
    int ret;

    p = *pp;

    c = *p;
    switch(c) {
    case '\\':
        p++;
        if (p >= s->buf_end)
            goto unexpected_end;
        c = *p++;
        switch(c) {
        case 'd':
            c = CHAR_RANGE_d;
            goto class_range;
        case 'D':
            c = CHAR_RANGE_D;
            goto class_range;
        case 's':
            c = CHAR_RANGE_s;
            goto class_range;
        case 'S':
            c = CHAR_RANGE_S;
            goto class_range;
        case 'w':
            c = CHAR_RANGE_w;
            goto class_range;
        case 'W':
            c = CHAR_RANGE_W;
        class_range:
            if (cr_init_char_range(s, cr, c))
                return -1;
            c = CLASS_RANGE_BASE;
            break;
        case 'c':
            c = *p;
            if ((c >= 'a' && c <= 'z') ||
                (c >= 'A' && c <= 'Z') ||
                (((c >= '0' && c <= '9') || c == '_') &&
                 inclass && !s->is_utf16)) {   /* Annex B.1.4 */
                c &= 0x1f;
                p++;
            } else if (s->is_utf16) {
                goto invalid_escape;
            } else {
                /* otherwise return '\' and 'c' */
                p--;
                c = '\\';
            }
            break;
#ifdef CONFIG_ALL_UNICODE
        case 'p':
        case 'P':
            if (s->is_utf16) {
                if (parse_unicode_property(s, cr, &p, (c == 'P')))
                    return -1;
                c = CLASS_RANGE_BASE;
                break;
            }
            /* fall thru */
#endif
        default:
            p--;
            ret = lre_parse_escape(&p, s->is_utf16 * 2);
            if (ret >= 0) {
                c = ret;
            } else {
                if (ret == -2 && *p != '\0' && strchr("^$\\.*+?()[]{}|/", *p)) {
                    /* always valid to escape these characters */
                    goto normal_char;
                } else if (s->is_utf16) {
                invalid_escape:
                    return re_parse_error(s, "invalid escape sequence in regular expression");
                } else {
                    /* just ignore the '\' */
                    goto normal_char;
                }
            }
            break;
        }
        break;
    case '\0':
        if (p >= s->buf_end) {
        unexpected_end:
            return re_parse_error(s, "unexpected end");
        }
        /* fall thru */
    default:
    normal_char:
        /* normal char */
        if (c >= 128) {
            c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p);
            if ((unsigned)c > 0xffff && !s->is_utf16) {
                /* XXX: should handle non BMP-1 code points */
                return re_parse_error(s, "malformed unicode char");
            }
        } else {
            p++;
        }
        break;
    }
    *pp = p;
    return c;
}

static int re_emit_range(REParseState *s, const CharRange *cr)
{
    int len, i;
    uint32_t high;

    len = (unsigned)cr->len / 2;
    if (len >= 65535)
        return re_parse_error(s, "too many ranges");
    if (len == 0) {
        /* not sure it can really happen. Emit a match that is always
           false */
        re_emit_op_u32(s, REOP_char32, -1);
    } else {
        high = cr->points[cr->len - 1];
        if (high == UINT32_MAX)
            high = cr->points[cr->len - 2];
        if (high <= 0xffff) {
            /* can use 16 bit ranges with the conversion that 0xffff =
               infinity */
            re_emit_op_u16(s, REOP_range, len);
            for(i = 0; i < cr->len; i += 2) {
                dbuf_put_u16(&s->byte_code, cr->points[i]);
                high = cr->points[i + 1] - 1;
                if (high == UINT32_MAX - 1)
                    high = 0xffff;
                dbuf_put_u16(&s->byte_code, high);
            }
        } else {
            re_emit_op_u16(s, REOP_range32, len);
            for(i = 0; i < cr->len; i += 2) {
                dbuf_put_u32(&s->byte_code, cr->points[i]);
                dbuf_put_u32(&s->byte_code, cr->points[i + 1] - 1);
            }
        }
    }
    return 0;
}

static int re_parse_char_class(REParseState *s, const uint8_t **pp)
{
    const uint8_t *p;
    uint32_t c1, c2;
    CharRange cr_s, *cr = &cr_s;
    CharRange cr1_s, *cr1 = &cr1_s;
    BOOL invert;

    cr_init(cr, s->opaque, lre_realloc);
    p = *pp;
    p++;    /* skip '[' */
    invert = FALSE;
    if (*p == '^') {
        p++;
        invert = TRUE;
    }
    for(;;) {
        if (*p == ']')
            break;
        c1 = get_class_atom(s, cr1, &p, TRUE);
        if ((int)c1 < 0)
            goto fail;
        if (*p == '-' && p[1] != ']') {
            const uint8_t *p0 = p + 1;
            if (c1 >= CLASS_RANGE_BASE) {
                if (s->is_utf16) {
                    cr_free(cr1);
                    goto invalid_class_range;
                }
                /* Annex B: match '-' character */
                goto class_atom;
            }
            c2 = get_class_atom(s, cr1, &p0, TRUE);
            if ((int)c2 < 0)
                goto fail;
            if (c2 >= CLASS_RANGE_BASE) {
                cr_free(cr1);
                if (s->is_utf16) {
                    goto invalid_class_range;
                }
                /* Annex B: match '-' character */
                goto class_atom;
            }
            p = p0;
            if (c2 < c1) {
            invalid_class_range:
                re_parse_error(s, "invalid class range");
                goto fail;
            }
            if (cr_union_interval(cr, c1, c2))
                goto memory_error;
        } else {
        class_atom:
            if (c1 >= CLASS_RANGE_BASE) {
                int ret;
                ret = cr_union1(cr, cr1->points, cr1->len);
                cr_free(cr1);
                if (ret)
                    goto memory_error;
            } else {
                if (cr_union_interval(cr, c1, c1))
                    goto memory_error;
            }
        }
    }
    if (s->ignore_case) {
        if (cr_canonicalize(cr))
            goto memory_error;
    }
    if (invert) {
        if (cr_invert(cr))
            goto memory_error;
    }
    if (re_emit_range(s, cr))
        goto fail;
    cr_free(cr);
    p++;    /* skip ']' */
    *pp = p;
    return 0;
 memory_error:
    re_parse_out_of_memory(s);
 fail:
    cr_free(cr);
    return -1;
}

/* Return:
   1 if the opcodes in bc_buf[] always advance the character pointer.
   0 if the character pointer may not be advanced.
   -1 if the code may depend on side effects of its previous execution (backreference)
*/
static int re_check_advance(const uint8_t *bc_buf, int bc_buf_len)
{
    int pos, opcode, ret, len, i;
    uint32_t val, last;
    BOOL has_back_reference;
    uint8_t capture_bitmap[CAPTURE_COUNT_MAX];

    ret = -2; /* not known yet */
    pos = 0;
    has_back_reference = FALSE;
    memset(capture_bitmap, 0, sizeof(capture_bitmap));

    while (pos < bc_buf_len) {
        opcode = bc_buf[pos];
        len = reopcode_info[opcode].size;
        switch(opcode) {
        case REOP_range:
            val = get_u16(bc_buf + pos + 1);
            len += val * 4;
            goto simple_char;
        case REOP_range32:
            val = get_u16(bc_buf + pos + 1);
            len += val * 8;
            goto simple_char;
        case REOP_char:
        case REOP_char32:
        case REOP_dot:
        case REOP_any:
        simple_char:
            if (ret == -2)
                ret = 1;
            break;
        case REOP_line_start:
        case REOP_line_end:
        case REOP_push_i32:
        case REOP_push_char_pos:
        case REOP_drop:
        case REOP_word_boundary:
        case REOP_not_word_boundary:
        case REOP_prev:
            /* no effect */
            break;
        case REOP_save_start:
        case REOP_save_end:
            val = bc_buf[pos + 1];
            capture_bitmap[val] |= 1;
            break;
        case REOP_save_reset:
            {
                val = bc_buf[pos + 1];
                last = bc_buf[pos + 2];
                while (val < last)
                    capture_bitmap[val++] |= 1;
            }
            break;
        case REOP_back_reference:
        case REOP_backward_back_reference:
            val = bc_buf[pos + 1];
            capture_bitmap[val] |= 2;
            has_back_reference = TRUE;
            break;
        default:
            /* safe behvior: we cannot predict the outcome */
            if (ret == -2)
                ret = 0;
            break;
        }
        pos += len;
    }
    if (has_back_reference) {
        /* check if there is back reference which references a capture
           made in the some code */
        for(i = 0; i < CAPTURE_COUNT_MAX; i++) {
            if (capture_bitmap[i] == 3)
                return -1;
        }
    }
    if (ret == -2)
        ret = 0;
    return ret;
}

/* return -1 if a simple quantifier cannot be used. Otherwise return
   the number of characters in the atom. */
static int re_is_simple_quantifier(const uint8_t *bc_buf, int bc_buf_len)
{
    int pos, opcode, len, count;
    uint32_t val;

    count = 0;
    pos = 0;
    while (pos < bc_buf_len) {
        opcode = bc_buf[pos];
        len = reopcode_info[opcode].size;
        switch(opcode) {
        case REOP_range:
            val = get_u16(bc_buf + pos + 1);
            len += val * 4;
            goto simple_char;
        case REOP_range32:
            val = get_u16(bc_buf + pos + 1);
            len += val * 8;
            goto simple_char;
        case REOP_char:
        case REOP_char32:
        case REOP_dot:
        case REOP_any:
        simple_char:
            count++;
            break;
        case REOP_line_start:
        case REOP_line_end:
        case REOP_word_boundary:
        case REOP_not_word_boundary:
            break;
        default:
            return -1;
        }
        pos += len;
    }
    return count;
}

/* '*pp' is the first char after '<' */
static int re_parse_group_name(char *buf, int buf_size,
                               const uint8_t **pp, BOOL is_utf16)
{
    const uint8_t *p;
    uint32_t c;
    char *q;

    p = *pp;
    q = buf;
    for(;;) {
        c = *p;
        if (c == '\\') {
            p++;
            if (*p != 'u')
                return -1;
            c = lre_parse_escape(&p, is_utf16 * 2);
        } else if (c == '>') {
            break;
        } else if (c >= 128) {
            c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p);
        } else {
            p++;
        }
        if (c > 0x10FFFF)
            return -1;
        if (q == buf) {
            if (!lre_js_is_ident_first(c))
                return -1;
        } else {
            if (!lre_js_is_ident_next(c))
                return -1;
        }
        if ((q - buf + UTF8_CHAR_LEN_MAX + 1) > buf_size)
            return -1;
        if (c < 128) {
            *q++ = c;
        } else {
            q += unicode_to_utf8((uint8_t*)q, c);
        }
    }
    if (q == buf)
        return -1;
    *q = '\0';
    p++;
    *pp = p;
    return 0;
}

/* if capture_name = NULL: return the number of captures + 1.
   Otherwise, return the capture index corresponding to capture_name
   or -1 if none */
static int re_parse_captures(REParseState *s, int *phas_named_captures,
                             const char *capture_name)
{
    const uint8_t *p;
    int capture_index;
    char name[TMP_BUF_SIZE];

    capture_index = 1;
    *phas_named_captures = 0;
    for (p = s->buf_start; p < s->buf_end; p++) {
        switch (*p) {
        case '(':
            if (p[1] == '?') {
                if (p[2] == '<' && p[3] != '=' && p[3] != '!') {
                    *phas_named_captures = 1;
                    /* potential named capture */
                    if (capture_name) {
                        p += 3;
                        if (re_parse_group_name(name, sizeof(name), &p,
                                                s->is_utf16) == 0) {
                            if (!strcmp(name, capture_name))
                                return capture_index;
                        }
                    }
                    capture_index++;
                    if (capture_index >= CAPTURE_COUNT_MAX)
                        goto done;
                }
            } else {
                capture_index++;
                if (capture_index >= CAPTURE_COUNT_MAX)
                    goto done;
            }
            break;
        case '\\':
            p++;
            break;
        case '[':
            for (p += 1 + (*p == ']'); p < s->buf_end && *p != ']'; p++) {
                if (*p == '\\')
                    p++;
            }
            break;
        }
    }
 done:
    if (capture_name)
        return -1;
    else
        return capture_index;
}

static int re_count_captures(REParseState *s)
{
    if (s->total_capture_count < 0) {
        s->total_capture_count = re_parse_captures(s, &s->has_named_captures,
                                                   NULL);
    }
    return s->total_capture_count;
}

static BOOL re_has_named_captures(REParseState *s)
{
    if (s->has_named_captures < 0)
        re_count_captures(s);
    return s->has_named_captures;
}

static int find_group_name(REParseState *s, const char *name)
{
    const char *p, *buf_end;
    size_t len, name_len;
    int capture_index;

    name_len = strlen(name);
    p = (char *)s->group_names.buf;
    buf_end = (char *)s->group_names.buf + s->group_names.size;
    capture_index = 1;
    while (p < buf_end) {
        len = strlen(p);
        if (len == name_len && memcmp(name, p, name_len) == 0)
            return capture_index;
        p += len + 1;
        capture_index++;
    }
    return -1;
}

static int re_parse_disjunction(REParseState *s, BOOL is_backward_dir);

static int re_parse_term(REParseState *s, BOOL is_backward_dir)
{
    const uint8_t *p;
    int c, last_atom_start, quant_min, quant_max, last_capture_count;
    BOOL greedy, add_zero_advance_check, is_neg, is_backward_lookahead;
    CharRange cr_s, *cr = &cr_s;

    last_atom_start = -1;
    last_capture_count = 0;
    p = s->buf_ptr;
    c = *p;
    switch(c) {
    case '^':
        p++;
        re_emit_op(s, REOP_line_start);
        break;
    case '$':
        p++;
        re_emit_op(s, REOP_line_end);
        break;
    case '.':
        p++;
        last_atom_start = s->byte_code.size;
        last_capture_count = s->capture_count;
        if (is_backward_dir)
            re_emit_op(s, REOP_prev);
        re_emit_op(s, s->dotall ? REOP_any : REOP_dot);
        if (is_backward_dir)
            re_emit_op(s, REOP_prev);
        break;
    case '{':
        if (s->is_utf16) {
            return re_parse_error(s, "syntax error");
        } else if (!is_digit(p[1])) {
            /* Annex B: we accept '{' not followed by digits as a
               normal atom */
            goto parse_class_atom;
        } else {
            const uint8_t *p1 = p + 1;
            /* Annex B: error if it is like a repetition count */
            parse_digits(&p1, TRUE);
            if (*p1 == ',') {
                p1++;
                if (is_digit(*p1)) {
                    parse_digits(&p1, TRUE);
                }
            }
            if (*p1 != '}') {
                goto parse_class_atom;
            }
        }
        /* fall thru */
    case '*':
    case '+':
    case '?':
        return re_parse_error(s, "nothing to repeat");
    case '(':
        if (p[1] == '?') {
            if (p[2] == ':') {
                p += 3;
                last_atom_start = s->byte_code.size;
                last_capture_count = s->capture_count;
                s->buf_ptr = p;
                if (re_parse_disjunction(s, is_backward_dir))
                    return -1;
                p = s->buf_ptr;
                if (re_parse_expect(s, &p, ')'))
                    return -1;
            } else if ((p[2] == '=' || p[2] == '!')) {
                is_neg = (p[2] == '!');
                is_backward_lookahead = FALSE;
                p += 3;
                goto lookahead;
            } else if (p[2] == '<' &&
                       (p[3] == '=' || p[3] == '!')) {
                int pos;
                is_neg = (p[3] == '!');
                is_backward_lookahead = TRUE;
                p += 4;
                /* lookahead */
            lookahead:
                /* Annex B allows lookahead to be used as an atom for
                   the quantifiers */
                if (!s->is_utf16 && !is_backward_lookahead)  {
                    last_atom_start = s->byte_code.size;
                    last_capture_count = s->capture_count;
                }
                pos = re_emit_op_u32(s, REOP_lookahead + is_neg, 0);
                s->buf_ptr = p;
                if (re_parse_disjunction(s, is_backward_lookahead))
                    return -1;
                p = s->buf_ptr;
                if (re_parse_expect(s, &p, ')'))
                    return -1;
                re_emit_op(s, REOP_match);
                /* jump after the 'match' after the lookahead is successful */
                if (dbuf_error(&s->byte_code))
                    return -1;
                put_u32(s->byte_code.buf + pos, s->byte_code.size - (pos + 4));
            } else if (p[2] == '<') {
                p += 3;
                if (re_parse_group_name(s->u.tmp_buf, sizeof(s->u.tmp_buf),
                                        &p, s->is_utf16)) {
                    return re_parse_error(s, "invalid group name");
                }
                if (find_group_name(s, s->u.tmp_buf) > 0) {
                    return re_parse_error(s, "duplicate group name");
                }
                /* group name with a trailing zero */
                dbuf_put(&s->group_names, (uint8_t *)s->u.tmp_buf,
                         strlen(s->u.tmp_buf) + 1);
                s->has_named_captures = 1;
                goto parse_capture;
            } else {
                return re_parse_error(s, "invalid group");
            }
        } else {
            int capture_index;
            p++;
            /* capture without group name */
            dbuf_putc(&s->group_names, 0);
        parse_capture:
            if (s->capture_count >= CAPTURE_COUNT_MAX)
                return re_parse_error(s, "too many captures");
            last_atom_start = s->byte_code.size;
            last_capture_count = s->capture_count;
            capture_index = s->capture_count++;
            re_emit_op_u8(s, REOP_save_start + is_backward_dir,
                          capture_index);

            s->buf_ptr = p;
            if (re_parse_disjunction(s, is_backward_dir))
                return -1;
            p = s->buf_ptr;

            re_emit_op_u8(s, REOP_save_start + 1 - is_backward_dir,
                          capture_index);

            if (re_parse_expect(s, &p, ')'))
                return -1;
        }
        break;
    case '\\':
        switch(p[1]) {
        case 'b':
        case 'B':
            re_emit_op(s, REOP_word_boundary + (p[1] != 'b'));
            p += 2;
            break;
        case 'k':
            {
                const uint8_t *p1;
                int dummy_res;

                p1 = p;
                if (p1[2] != '<') {
                    /* annex B: we tolerate invalid group names in non
                       unicode mode if there is no named capture
                       definition */
                    if (s->is_utf16 || re_has_named_captures(s))
                        return re_parse_error(s, "expecting group name");
                    else
                        goto parse_class_atom;
                }
                p1 += 3;
                if (re_parse_group_name(s->u.tmp_buf, sizeof(s->u.tmp_buf),
                                        &p1, s->is_utf16)) {
                    if (s->is_utf16 || re_has_named_captures(s))
                        return re_parse_error(s, "invalid group name");
                    else
                        goto parse_class_atom;
                }
                c = find_group_name(s, s->u.tmp_buf);
                if (c < 0) {
                    /* no capture name parsed before, try to look
                       after (inefficient, but hopefully not common */
                    c = re_parse_captures(s, &dummy_res, s->u.tmp_buf);
                    if (c < 0) {
                        if (s->is_utf16 || re_has_named_captures(s))
                            return re_parse_error(s, "group name not defined");
                        else
                            goto parse_class_atom;
                    }
                }
                p = p1;
            }
            last_atom_start = s->byte_code.size;
            last_capture_count = s->capture_count;
            re_emit_op_u8(s, REOP_back_reference + is_backward_dir, c);
            break;

        case '0':
            p += 2;
            c = 0;
            if (s->is_utf16) {
                if (is_digit(*p)) {
                    return re_parse_error(s, "invalid decimal escape in regular expression");
                }
            } else {
                /* Annex B.1.4: accept legacy octal */
                if (*p >= '0' && *p <= '7') {
                    c = *p++ - '0';
                    if (*p >= '0' && *p <= '7') {
                        c = (c << 3) + *p++ - '0';
                    }
                }
            }
            goto normal_char;
        case '1': case '2': case '3': case '4':
        case '5': case '6': case '7': case '8':
        case '9':
            {
                const uint8_t *q = ++p;

                c = parse_digits(&p, FALSE);
                if (c < 0 || (c >= s->capture_count && c >= re_count_captures(s))) {
                    if (!s->is_utf16) {
                        /* Annex B.1.4: accept legacy octal */
                        p = q;
                        if (*p <= '7') {
                            c = 0;
                            if (*p <= '3')
                                c = *p++ - '0';
                            if (*p >= '0' && *p <= '7') {
                                c = (c << 3) + *p++ - '0';
                                if (*p >= '0' && *p <= '7') {
                                    c = (c << 3) + *p++ - '0';
                                }
                            }
                        } else {
                            c = *p++;
                        }
                        goto normal_char;
                    }
                    return re_parse_error(s, "back reference out of range in regular expression");
                }
            emit_back_reference:
                last_atom_start = s->byte_code.size;
                last_capture_count = s->capture_count;
                re_emit_op_u8(s, REOP_back_reference + is_backward_dir, c);
            }
            break;
        default:
            goto parse_class_atom;
        }
        break;
    case '[':
        last_atom_start = s->byte_code.size;
        last_capture_count = s->capture_count;
        if (is_backward_dir)
            re_emit_op(s, REOP_prev);
        if (re_parse_char_class(s, &p))
            return -1;
        if (is_backward_dir)
            re_emit_op(s, REOP_prev);
        break;
    case ']':
    case '}':
        if (s->is_utf16)
            return re_parse_error(s, "syntax error");
        goto parse_class_atom;
    default:
    parse_class_atom:
        c = get_class_atom(s, cr, &p, FALSE);
        if ((int)c < 0)
            return -1;
    normal_char:
        last_atom_start = s->byte_code.size;
        last_capture_count = s->capture_count;
        if (is_backward_dir)
            re_emit_op(s, REOP_prev);
        if (c >= CLASS_RANGE_BASE) {
            int ret;
            /* Note: canonicalization is not needed */
            ret = re_emit_range(s, cr);
            cr_free(cr);
            if (ret)
                return -1;
        } else {
            if (s->ignore_case)
                c = lre_canonicalize(c, s->is_utf16);
            if (c <= 0xffff)
                re_emit_op_u16(s, REOP_char, c);
            else
                re_emit_op_u32(s, REOP_char32, c);
        }
        if (is_backward_dir)
            re_emit_op(s, REOP_prev);
        break;
    }

    /* quantifier */
    if (last_atom_start >= 0) {
        c = *p;
        switch(c) {
        case '*':
            p++;
            quant_min = 0;
            quant_max = INT32_MAX;
            goto quantifier;
        case '+':
            p++;
            quant_min = 1;
            quant_max = INT32_MAX;
            goto quantifier;
        case '?':
            p++;
            quant_min = 0;
            quant_max = 1;
            goto quantifier;
        case '{':
            {
                const uint8_t *p1 = p;
                /* As an extension (see ES6 annex B), we accept '{' not
                   followed by digits as a normal atom */
                if (!is_digit(p[1])) {
                    if (s->is_utf16)
                        goto invalid_quant_count;
                    break;
                }
                p++;
                quant_min = parse_digits(&p, TRUE);
                quant_max = quant_min;
                if (*p == ',') {
                    p++;
                    if (is_digit(*p)) {
                        quant_max = parse_digits(&p, TRUE);
                        if (quant_max < quant_min) {
                        invalid_quant_count:
                            return re_parse_error(s, "invalid repetition count");
                        }
                    } else {
                        quant_max = INT32_MAX; /* infinity */
                    }
                }
                if (*p != '}' && !s->is_utf16) {
                    /* Annex B: normal atom if invalid '{' syntax */
                    p = p1;
                    break;
                }
                if (re_parse_expect(s, &p, '}'))
                    return -1;
            }
        quantifier:
            greedy = TRUE;
            if (*p == '?') {
                p++;
                greedy = FALSE;
            }
            if (last_atom_start < 0) {
                return re_parse_error(s, "nothing to repeat");
            }
            if (greedy) {
                int len, pos;

                if (quant_max > 0) {
                    /* specific optimization for simple quantifiers */
                    if (dbuf_error(&s->byte_code))
                        goto out_of_memory;
                    len = re_is_simple_quantifier(s->byte_code.buf + last_atom_start,
                                                 s->byte_code.size - last_atom_start);
                    if (len > 0) {
                        re_emit_op(s, REOP_match);

                        if (dbuf_insert(&s->byte_code, last_atom_start, 17))
                            goto out_of_memory;
                        pos = last_atom_start;
                        s->byte_code.buf[pos++] = REOP_simple_greedy_quant;
                        put_u32(&s->byte_code.buf[pos],
                                s->byte_code.size - last_atom_start - 17);
                        pos += 4;
                        put_u32(&s->byte_code.buf[pos], quant_min);
                        pos += 4;
                        put_u32(&s->byte_code.buf[pos], quant_max);
                        pos += 4;
                        put_u32(&s->byte_code.buf[pos], len);
                        pos += 4;
                        goto done;
                    }
                }

                if (dbuf_error(&s->byte_code))
                    goto out_of_memory;
                add_zero_advance_check = (re_check_advance(s->byte_code.buf + last_atom_start,
                                                           s->byte_code.size - last_atom_start) == 0);
            } else {
                add_zero_advance_check = FALSE;
            }

            {
                int len, pos;
                len = s->byte_code.size - last_atom_start;
                if (quant_min == 0) {
                    /* need to reset the capture in case the atom is
                       not executed */
                    if (last_capture_count != s->capture_count) {
                        if (dbuf_insert(&s->byte_code, last_atom_start, 3))
                            goto out_of_memory;
                        s->byte_code.buf[last_atom_start++] = REOP_save_reset;
                        s->byte_code.buf[last_atom_start++] = last_capture_count;
                        s->byte_code.buf[last_atom_start++] = s->capture_count - 1;
                    }
                    if (quant_max == 0) {
                        s->byte_code.size = last_atom_start;
                    } else if (quant_max == 1) {
                        if (dbuf_insert(&s->byte_code, last_atom_start, 5))
                            goto out_of_memory;
                        s->byte_code.buf[last_atom_start] = REOP_split_goto_first +
                            greedy;
                        put_u32(s->byte_code.buf + last_atom_start + 1, len);
                    } else if (quant_max == INT32_MAX) {
                        if (dbuf_insert(&s->byte_code, last_atom_start, 5 + add_zero_advance_check))
                            goto out_of_memory;
                        s->byte_code.buf[last_atom_start] = REOP_split_goto_first +
                            greedy;
                        put_u32(s->byte_code.buf + last_atom_start + 1,
                                len + 5 + add_zero_advance_check);
                        if (add_zero_advance_check) {
                            /* avoid infinite loop by stoping the
                               recursion if no advance was made in the
                               atom (only works if the atom has no
                               side effect) */
                            s->byte_code.buf[last_atom_start + 1 + 4] = REOP_push_char_pos;
                            re_emit_goto(s, REOP_bne_char_pos, last_atom_start);
                        } else {
                            re_emit_goto(s, REOP_goto, last_atom_start);
                        }
                    } else {
                        if (dbuf_insert(&s->byte_code, last_atom_start, 10))
                            goto out_of_memory;
                        pos = last_atom_start;
                        s->byte_code.buf[pos++] = REOP_push_i32;
                        put_u32(s->byte_code.buf + pos, quant_max);
                        pos += 4;
                        s->byte_code.buf[pos++] = REOP_split_goto_first + greedy;
                        put_u32(s->byte_code.buf + pos, len + 5);
                        re_emit_goto(s, REOP_loop, last_atom_start + 5);
                        re_emit_op(s, REOP_drop);
                    }
                } else if (quant_min == 1 && quant_max == INT32_MAX &&
                           !add_zero_advance_check) {
                    re_emit_goto(s, REOP_split_next_first - greedy,
                                 last_atom_start);
                } else {
                    if (quant_min == 1) {
                        /* nothing to add */
                    } else {
                        if (dbuf_insert(&s->byte_code, last_atom_start, 5))
                            goto out_of_memory;
                        s->byte_code.buf[last_atom_start] = REOP_push_i32;
                        put_u32(s->byte_code.buf + last_atom_start + 1,
                                quant_min);
                        last_atom_start += 5;
                        re_emit_goto(s, REOP_loop, last_atom_start);
                        re_emit_op(s, REOP_drop);
                    }
                    if (quant_max == INT32_MAX) {
                        pos = s->byte_code.size;
                        re_emit_op_u32(s, REOP_split_goto_first + greedy,
                                       len + 5 + add_zero_advance_check);
                        if (add_zero_advance_check)
                            re_emit_op(s, REOP_push_char_pos);
                        /* copy the atom */
                        dbuf_put_self(&s->byte_code, last_atom_start, len);
                        if (add_zero_advance_check)
                            re_emit_goto(s, REOP_bne_char_pos, pos);
                        else
                            re_emit_goto(s, REOP_goto, pos);
                    } else if (quant_max > quant_min) {
                        re_emit_op_u32(s, REOP_push_i32, quant_max - quant_min);
                        pos = s->byte_code.size;
                        re_emit_op_u32(s, REOP_split_goto_first + greedy, len + 5);
                        /* copy the atom */
                        dbuf_put_self(&s->byte_code, last_atom_start, len);

                        re_emit_goto(s, REOP_loop, pos);
                        re_emit_op(s, REOP_drop);
                    }
                }
                last_atom_start = -1;
            }
            break;
        default:
            break;
        }
    }
 done:
    s->buf_ptr = p;
    return 0;
 out_of_memory:
    return re_parse_out_of_memory(s);
}

static int re_parse_alternative(REParseState *s, BOOL is_backward_dir)
{
    const uint8_t *p;
    int ret;
    size_t start, term_start, end, term_size;

    start = s->byte_code.size;
    for(;;) {
        p = s->buf_ptr;
        if (p >= s->buf_end)
            break;
        if (*p == '|' || *p == ')')
            break;
        term_start = s->byte_code.size;
        ret = re_parse_term(s, is_backward_dir);
        if (ret)
            return ret;
        if (is_backward_dir) {
            /* reverse the order of the terms (XXX: inefficient, but
               speed is not really critical here) */
            end = s->byte_code.size;
            term_size = end - term_start;
            if (dbuf_realloc(&s->byte_code, end + term_size))
                return -1;
            memmove(s->byte_code.buf + start + term_size,
                    s->byte_code.buf + start,
                    end - start);
            memcpy(s->byte_code.buf + start, s->byte_code.buf + end,
                   term_size);
        }
    }
    return 0;
}

static int re_parse_disjunction(REParseState *s, BOOL is_backward_dir)
{
    int start, len, pos;

    if (lre_check_stack_overflow(s->opaque, 0))
        return re_parse_error(s, "stack overflow");

    start = s->byte_code.size;
    if (re_parse_alternative(s, is_backward_dir))
        return -1;
    while (*s->buf_ptr == '|') {
        s->buf_ptr++;

        len = s->byte_code.size - start;

        /* insert a split before the first alternative */
        if (dbuf_insert(&s->byte_code, start, 5)) {
            return re_parse_out_of_memory(s);
        }
        s->byte_code.buf[start] = REOP_split_next_first;
        put_u32(s->byte_code.buf + start + 1, len + 5);

        pos = re_emit_op_u32(s, REOP_goto, 0);

        if (re_parse_alternative(s, is_backward_dir))
            return -1;

        /* patch the goto */
        len = s->byte_code.size - (pos + 4);
        put_u32(s->byte_code.buf + pos, len);
    }
    return 0;
}

/* the control flow is recursive so the analysis can be linear */
static int compute_stack_size(const uint8_t *bc_buf, int bc_buf_len)
{
    int stack_size, stack_size_max, pos, opcode, len;
    uint32_t val;

    stack_size = 0;
    stack_size_max = 0;
    bc_buf += RE_HEADER_LEN;
    bc_buf_len -= RE_HEADER_LEN;
    pos = 0;
    while (pos < bc_buf_len) {
        opcode = bc_buf[pos];
        len = reopcode_info[opcode].size;
        assert(opcode < REOP_COUNT);
        assert((pos + len) <= bc_buf_len);
        switch(opcode) {
        case REOP_push_i32:
        case REOP_push_char_pos:
            stack_size++;
            if (stack_size > stack_size_max) {
                if (stack_size > STACK_SIZE_MAX)
                    return -1;
                stack_size_max = stack_size;
            }
            break;
        case REOP_drop:
        case REOP_bne_char_pos:
            assert(stack_size > 0);
            stack_size--;
            break;
        case REOP_range:
            val = get_u16(bc_buf + pos + 1);
            len += val * 4;
            break;
        case REOP_range32:
            val = get_u16(bc_buf + pos + 1);
            len += val * 8;
            break;
        }
        pos += len;
    }
    return stack_size_max;
}

/* 'buf' must be a zero terminated UTF-8 string of length buf_len.
   Return NULL if error and allocate an error message in *perror_msg,
   otherwise the compiled bytecode and its length in plen.
*/
inline uint8_t *lre_compile(int *plen, char *error_msg, int error_msg_size,
                     const char *buf, size_t buf_len, int re_flags,
                     void *opaque)
{
    REParseState s_s, *s = &s_s;
    int stack_size;
    BOOL is_sticky;

    memset(s, 0, sizeof(*s));
    s->opaque = opaque;
    s->buf_ptr = (const uint8_t *)buf;
    s->buf_end = s->buf_ptr + buf_len;
    s->buf_start = s->buf_ptr;
    s->re_flags = re_flags;
    s->is_utf16 = ((re_flags & LRE_FLAG_UTF16) != 0);
    is_sticky = ((re_flags & LRE_FLAG_STICKY) != 0);
    s->ignore_case = ((re_flags & LRE_FLAG_IGNORECASE) != 0);
    s->dotall = ((re_flags & LRE_FLAG_DOTALL) != 0);
    s->capture_count = 1;
    s->total_capture_count = -1;
    s->has_named_captures = -1;

    dbuf_init2(&s->byte_code, opaque, lre_realloc);
    dbuf_init2(&s->group_names, opaque, lre_realloc);

    dbuf_putc(&s->byte_code, re_flags); /* first element is the flags */
    dbuf_putc(&s->byte_code, 0); /* second element is the number of captures */
    dbuf_putc(&s->byte_code, 0); /* stack size */
    dbuf_put_u32(&s->byte_code, 0); /* bytecode length */

    if (!is_sticky) {
        /* iterate thru all positions (about the same as .*?( ... ) )
           .  We do it without an explicit loop so that lock step
           thread execution will be possible in an optimized
           implementation */
        re_emit_op_u32(s, REOP_split_goto_first, 1 + 5);
        re_emit_op(s, REOP_any);
        re_emit_op_u32(s, REOP_goto, -(5 + 1 + 5));
    }
    re_emit_op_u8(s, REOP_save_start, 0);

    if (re_parse_disjunction(s, FALSE)) {
    error:
        dbuf_free(&s->byte_code);
        dbuf_free(&s->group_names);
        pstrcpy(error_msg, error_msg_size, s->u.error_msg);
        *plen = 0;
        return NULL;
    }

    re_emit_op_u8(s, REOP_save_end, 0);

    re_emit_op(s, REOP_match);

    if (*s->buf_ptr != '\0') {
        re_parse_error(s, "extraneous characters at the end");
        goto error;
    }

    if (dbuf_error(&s->byte_code)) {
        re_parse_out_of_memory(s);
        goto error;
    }

    stack_size = compute_stack_size(s->byte_code.buf, s->byte_code.size);
    if (stack_size < 0) {
        re_parse_error(s, "too many imbricated quantifiers");
        goto error;
    }

    s->byte_code.buf[RE_HEADER_CAPTURE_COUNT] = s->capture_count;
    s->byte_code.buf[RE_HEADER_STACK_SIZE] = stack_size;
    put_u32(s->byte_code.buf + 3, s->byte_code.size - RE_HEADER_LEN);

    /* add the named groups if needed */
    if (s->group_names.size > (s->capture_count - 1)) {
        dbuf_put(&s->byte_code, s->group_names.buf, s->group_names.size);
        s->byte_code.buf[RE_HEADER_FLAGS] |= LRE_FLAG_NAMED_GROUPS;
    }
    dbuf_free(&s->group_names);

#ifdef DUMP_REOP
    lre_dump_bytecode(s->byte_code.buf, s->byte_code.size);
#endif

    error_msg[0] = '\0';
    *plen = s->byte_code.size;
    return s->byte_code.buf;
}

static BOOL is_line_terminator(uint32_t c)
{
    return (c == '\n' || c == '\r' || c == CP_LS || c == CP_PS);
}

static BOOL is_word_char(uint32_t c)
{
    return ((c >= '0' && c <= '9') ||
            (c >= 'a' && c <= 'z') ||
            (c >= 'A' && c <= 'Z') ||
            (c == '_'));
}

#define GET_CHAR(c, cptr, cbuf_end)                                     \
    do {                                                                \
        if (cbuf_type == 0) {                                           \
            c = *cptr++;                                                \
        } else {                                                        \
            uint32_t __c1;                                              \
            c = *(uint16_t *)cptr;                                      \
            cptr += 2;                                                  \
            if (c >= 0xd800 && c < 0xdc00 &&                            \
                cbuf_type == 2 && cptr < cbuf_end) {                    \
                __c1 = *(uint16_t *)cptr;                               \
                if (__c1 >= 0xdc00 && __c1 < 0xe000) {                  \
                    c = (((c & 0x3ff) << 10) | (__c1 & 0x3ff)) + 0x10000; \
                    cptr += 2;                                          \
                }                                                       \
            }                                                           \
        }                                                               \
    } while (0)

#define PEEK_CHAR(c, cptr, cbuf_end)             \
    do {                                         \
        if (cbuf_type == 0) {                    \
            c = cptr[0];                         \
        } else {                                 \
            uint32_t __c1;                                              \
            c = ((uint16_t *)cptr)[0];                                  \
            if (c >= 0xd800 && c < 0xdc00 &&                            \
                cbuf_type == 2 && (cptr + 2) < cbuf_end) {              \
                __c1 = ((uint16_t *)cptr)[1];                           \
                if (__c1 >= 0xdc00 && __c1 < 0xe000) {                  \
                    c = (((c & 0x3ff) << 10) | (__c1 & 0x3ff)) + 0x10000; \
                }                                                       \
            }                                                           \
        }                                        \
    } while (0)

#define PEEK_PREV_CHAR(c, cptr, cbuf_start)                 \
    do {                                         \
        if (cbuf_type == 0) {                    \
            c = cptr[-1];                        \
        } else {                                 \
            uint32_t __c1;                                              \
            c = ((uint16_t *)cptr)[-1];                                 \
            if (c >= 0xdc00 && c < 0xe000 &&                            \
                cbuf_type == 2 && (cptr - 4) >= cbuf_start) {              \
                __c1 = ((uint16_t *)cptr)[-2];                          \
                if (__c1 >= 0xd800 && __c1 < 0xdc00 ) {                 \
                    c = (((__c1 & 0x3ff) << 10) | (c & 0x3ff)) + 0x10000; \
                }                                                       \
            }                                                           \
        }                                                               \
    } while (0)

#define GET_PREV_CHAR(c, cptr, cbuf_start)       \
    do {                                         \
        if (cbuf_type == 0) {                    \
            cptr--;                              \
            c = cptr[0];                         \
        } else {                                 \
            uint32_t __c1;                                              \
            cptr -= 2;                                                  \
            c = ((uint16_t *)cptr)[0];                                 \
            if (c >= 0xdc00 && c < 0xe000 &&                            \
                cbuf_type == 2 && cptr > cbuf_start) {                  \
                __c1 = ((uint16_t *)cptr)[-1];                          \
                if (__c1 >= 0xd800 && __c1 < 0xdc00 ) {                 \
                    cptr -= 2;                                          \
                    c = (((__c1 & 0x3ff) << 10) | (c & 0x3ff)) + 0x10000; \
                }                                                       \
            }                                                           \
        }                                                               \
    } while (0)

#define PREV_CHAR(cptr, cbuf_start)       \
    do {                                  \
        if (cbuf_type == 0) {             \
            cptr--;                       \
        } else {                          \
            cptr -= 2;                          \
            if (cbuf_type == 2) {                                       \
                c = ((uint16_t *)cptr)[0];                              \
                if (c >= 0xdc00 && c < 0xe000 && cptr > cbuf_start) {   \
                    c = ((uint16_t *)cptr)[-1];                         \
                    if (c >= 0xd800 && c < 0xdc00)                      \
                        cptr -= 2;                                      \
                }                                                       \
            }                                                           \
        }                                                               \
    } while (0)

typedef uintptr_t StackInt;

typedef enum {
    RE_EXEC_STATE_SPLIT,
    RE_EXEC_STATE_LOOKAHEAD,
    RE_EXEC_STATE_NEGATIVE_LOOKAHEAD,
    RE_EXEC_STATE_GREEDY_QUANT,
} REExecStateEnum;

typedef struct REExecState {
    REExecStateEnum type : 8;
    uint8_t stack_len;
    size_t count; /* only used for RE_EXEC_STATE_GREEDY_QUANT */
    const uint8_t *cptr;
    const uint8_t *pc;
    void *buf[0];
} REExecState;

typedef struct {
    const uint8_t *cbuf;
    const uint8_t *cbuf_end;
    /* 0 = 8 bit chars, 1 = 16 bit chars, 2 = 16 bit chars, UTF-16 */
    int cbuf_type;
    int capture_count;
    int stack_size_max;
    BOOL multi_line;
    BOOL ignore_case;
    BOOL is_utf16;
    void *opaque; /* used for stack overflow check */

    size_t state_size;
    uint8_t *state_stack;
    size_t state_stack_size;
    size_t state_stack_len;
} REExecContext;

static int push_state(REExecContext *s,
                      uint8_t **capture,
                      StackInt *stack, size_t stack_len,
                      const uint8_t *pc, const uint8_t *cptr,
                      REExecStateEnum type, size_t count)
{
    REExecState *rs;
    uint8_t *new_stack;
    size_t new_size, i, n;
    StackInt *stack_buf;

    if (js_unlikely((s->state_stack_len + 1) > s->state_stack_size)) {
        /* reallocate the stack */
        new_size = s->state_stack_size * 3 / 2;
        if (new_size < 8)
            new_size = 8;
        new_stack = (uint8_t*) lre_realloc(s->opaque, s->state_stack, new_size * s->state_size);
        if (!new_stack)
            return -1;
        s->state_stack_size = new_size;
        s->state_stack = new_stack;
    }
    rs = (REExecState *)(s->state_stack + s->state_stack_len * s->state_size);
    s->state_stack_len++;
    rs->type = type;
    rs->count = count;
    rs->stack_len = stack_len;
    rs->cptr = cptr;
    rs->pc = pc;
    n = 2 * s->capture_count;
    for(i = 0; i < n; i++)
        rs->buf[i] = capture[i];
    stack_buf = (StackInt *)(rs->buf + n);
    for(i = 0; i < stack_len; i++)
        stack_buf[i] = stack[i];
    return 0;
}

/* return 1 if match, 0 if not match or -1 if error. */
static intptr_t lre_exec_backtrack(REExecContext *s, uint8_t **capture,
                                   StackInt *stack, int stack_len,
                                   const uint8_t *pc, const uint8_t *cptr,
                                   BOOL no_recurse)
{
    int opcode, ret;
    int cbuf_type;
    uint32_t val, c;
    const uint8_t *cbuf_end;

    cbuf_type = s->cbuf_type;
    cbuf_end = s->cbuf_end;

    for(;;) {
        //        printf("top=%p: pc=%d\n", th_list.top, (int)(pc - (bc_buf + RE_HEADER_LEN)));
        opcode = *pc++;
        switch(opcode) {
        case REOP_match:
            {
                REExecState *rs;
                if (no_recurse)
                    return (intptr_t)cptr;
                ret = 1;
                goto recurse;
            no_match:
                if (no_recurse)
                    return 0;
                ret = 0;
            recurse:
                for(;;) {
                    if (s->state_stack_len == 0)
                        return ret;
                    rs = (REExecState *)(s->state_stack +
                                         (s->state_stack_len - 1) * s->state_size);
                    if (rs->type == RE_EXEC_STATE_SPLIT) {
                        if (!ret) {
                        pop_state:
                            memcpy(capture, rs->buf,
                                   sizeof(capture[0]) * 2 * s->capture_count);
                        pop_state1:
                            pc = rs->pc;
                            cptr = rs->cptr;
                            stack_len = rs->stack_len;
                            memcpy(stack, rs->buf + 2 * s->capture_count,
                                   stack_len * sizeof(stack[0]));
                            s->state_stack_len--;
                            break;
                        }
                    } else if (rs->type == RE_EXEC_STATE_GREEDY_QUANT) {
                        if (!ret) {
                            uint32_t char_count, i;
                            memcpy(capture, rs->buf,
                                   sizeof(capture[0]) * 2 * s->capture_count);
                            stack_len = rs->stack_len;
                            memcpy(stack, rs->buf + 2 * s->capture_count,
                                   stack_len * sizeof(stack[0]));
                            pc = rs->pc;
                            cptr = rs->cptr;
                            /* go backward */
                            char_count = get_u32(pc + 12);
                            for(i = 0; i < char_count; i++) {
                                PREV_CHAR(cptr, s->cbuf);
                            }
                            pc = (pc + 16) + (int)get_u32(pc);
                            rs->cptr = cptr;
                            rs->count--;
                            if (rs->count == 0) {
                                s->state_stack_len--;
                            }
                            break;
                        }
                    } else {
                        ret = ((rs->type == RE_EXEC_STATE_LOOKAHEAD && ret) ||
                               (rs->type == RE_EXEC_STATE_NEGATIVE_LOOKAHEAD && !ret));
                        if (ret) {
                            /* keep the capture in case of positive lookahead */
                            if (rs->type == RE_EXEC_STATE_LOOKAHEAD)
                                goto pop_state1;
                            else
                                goto pop_state;
                        }
                    }
                    s->state_stack_len--;
                }
            }
            break;
        case REOP_char32:
            val = get_u32(pc);
            pc += 4;
            goto test_char;
        case REOP_char:
            val = get_u16(pc);
            pc += 2;
        test_char:
            if (cptr >= cbuf_end)
                goto no_match;
            GET_CHAR(c, cptr, cbuf_end);
            if (s->ignore_case) {
                c = lre_canonicalize(c, s->is_utf16);
            }
            if (val != c)
                goto no_match;
            break;
        case REOP_split_goto_first:
        case REOP_split_next_first:
            {
                const uint8_t *pc1;

                val = get_u32(pc);
                pc += 4;
                if (opcode == REOP_split_next_first) {
                    pc1 = pc + (int)val;
                } else {
                    pc1 = pc;
                    pc = pc + (int)val;
                }
                ret = push_state(s, capture, stack, stack_len,
                                 pc1, cptr, RE_EXEC_STATE_SPLIT, 0);
                if (ret < 0)
                    return -1;
                break;
            }
        case REOP_lookahead:
        case REOP_negative_lookahead:
            val = get_u32(pc);
            pc += 4;
            ret = push_state(s, capture, stack, stack_len,
                             pc + (int)val, cptr,
                             (REExecStateEnum) (RE_EXEC_STATE_LOOKAHEAD + opcode - REOP_lookahead),
                             0);
            if (ret < 0)
                return -1;
            break;

        case REOP_goto:
            val = get_u32(pc);
            pc += 4 + (int)val;
            break;
        case REOP_line_start:
            if (cptr == s->cbuf)
                break;
            if (!s->multi_line)
                goto no_match;
            PEEK_PREV_CHAR(c, cptr, s->cbuf);
            if (!is_line_terminator(c))
                goto no_match;
            break;
        case REOP_line_end:
            if (cptr == cbuf_end)
                break;
            if (!s->multi_line)
                goto no_match;
            PEEK_CHAR(c, cptr, cbuf_end);
            if (!is_line_terminator(c))
                goto no_match;
            break;
        case REOP_dot:
            if (cptr == cbuf_end)
                goto no_match;
            GET_CHAR(c, cptr, cbuf_end);
            if (is_line_terminator(c))
                goto no_match;
            break;
        case REOP_any:
            if (cptr == cbuf_end)
                goto no_match;
            GET_CHAR(c, cptr, cbuf_end);
            break;
        case REOP_save_start:
        case REOP_save_end:
            val = *pc++;
            assert(val < s->capture_count);
            capture[2 * val + opcode - REOP_save_start] = (uint8_t *)cptr;
            break;
        case REOP_save_reset:
            {
                uint32_t val2;
                val = pc[0];
                val2 = pc[1];
                pc += 2;
                assert(val2 < s->capture_count);
                while (val <= val2) {
                    capture[2 * val] = NULL;
                    capture[2 * val + 1] = NULL;
                    val++;
                }
            }
            break;
        case REOP_push_i32:
            val = get_u32(pc);
            pc += 4;
            stack[stack_len++] = val;
            break;
        case REOP_drop:
            stack_len--;
            break;
        case REOP_loop:
            val = get_u32(pc);
            pc += 4;
            if (--stack[stack_len - 1] != 0) {
                pc += (int)val;
            }
            break;
        case REOP_push_char_pos:
            stack[stack_len++] = (uintptr_t)cptr;
            break;
        case REOP_bne_char_pos:
            val = get_u32(pc);
            pc += 4;
            if (stack[--stack_len] != (uintptr_t)cptr)
                pc += (int)val;
            break;
        case REOP_word_boundary:
        case REOP_not_word_boundary:
            {
                BOOL v1, v2;
                /* char before */
                if (cptr == s->cbuf) {
                    v1 = FALSE;
                } else {
                    PEEK_PREV_CHAR(c, cptr, s->cbuf);
                    v1 = is_word_char(c);
                }
                /* current char */
                if (cptr >= cbuf_end) {
                    v2 = FALSE;
                } else {
                    PEEK_CHAR(c, cptr, cbuf_end);
                    v2 = is_word_char(c);
                }
                if (v1 ^ v2 ^ (REOP_not_word_boundary - opcode))
                    goto no_match;
            }
            break;
        case REOP_back_reference:
        case REOP_backward_back_reference:
            {
                const uint8_t *cptr1, *cptr1_end, *cptr1_start;
                uint32_t c1, c2;

                val = *pc++;
                if (val >= s->capture_count)
                    goto no_match;
                cptr1_start = capture[2 * val];
                cptr1_end = capture[2 * val + 1];
                if (!cptr1_start || !cptr1_end)
                    break;
                if (opcode == REOP_back_reference) {
                    cptr1 = cptr1_start;
                    while (cptr1 < cptr1_end) {
                        if (cptr >= cbuf_end)
                            goto no_match;
                        GET_CHAR(c1, cptr1, cptr1_end);
                        GET_CHAR(c2, cptr, cbuf_end);
                        if (s->ignore_case) {
                            c1 = lre_canonicalize(c1, s->is_utf16);
                            c2 = lre_canonicalize(c2, s->is_utf16);
                        }
                        if (c1 != c2)
                            goto no_match;
                    }
                } else {
                    cptr1 = cptr1_end;
                    while (cptr1 > cptr1_start) {
                        if (cptr == s->cbuf)
                            goto no_match;
                        GET_PREV_CHAR(c1, cptr1, cptr1_start);
                        GET_PREV_CHAR(c2, cptr, s->cbuf);
                        if (s->ignore_case) {
                            c1 = lre_canonicalize(c1, s->is_utf16);
                            c2 = lre_canonicalize(c2, s->is_utf16);
                        }
                        if (c1 != c2)
                            goto no_match;
                    }
                }
            }
            break;
        case REOP_range:
            {
                int n;
                uint32_t low, high, idx_min, idx_max, idx;

                n = get_u16(pc); /* n must be >= 1 */
                pc += 2;
                if (cptr >= cbuf_end)
                    goto no_match;
                GET_CHAR(c, cptr, cbuf_end);
                if (s->ignore_case) {
                    c = lre_canonicalize(c, s->is_utf16);
                }
                idx_min = 0;
                low = get_u16(pc + 0 * 4);
                if (c < low)
                    goto no_match;
                idx_max = n - 1;
                high = get_u16(pc + idx_max * 4 + 2);
                /* 0xffff in for last value means +infinity */
                if (js_unlikely(c >= 0xffff) && high == 0xffff)
                    goto range_match;
                if (c > high)
                    goto no_match;
                while (idx_min <= idx_max) {
                    idx = (idx_min + idx_max) / 2;
                    low = get_u16(pc + idx * 4);
                    high = get_u16(pc + idx * 4 + 2);
                    if (c < low)
                        idx_max = idx - 1;
                    else if (c > high)
                        idx_min = idx + 1;
                    else
                        goto range_match;
                }
                goto no_match;
            range_match:
                pc += 4 * n;
            }
            break;
        case REOP_range32:
            {
                int n;
                uint32_t low, high, idx_min, idx_max, idx;

                n = get_u16(pc); /* n must be >= 1 */
                pc += 2;
                if (cptr >= cbuf_end)
                    goto no_match;
                GET_CHAR(c, cptr, cbuf_end);
                if (s->ignore_case) {
                    c = lre_canonicalize(c, s->is_utf16);
                }
                idx_min = 0;
                low = get_u32(pc + 0 * 8);
                if (c < low)
                    goto no_match;
                idx_max = n - 1;
                high = get_u32(pc + idx_max * 8 + 4);
                if (c > high)
                    goto no_match;
                while (idx_min <= idx_max) {
                    idx = (idx_min + idx_max) / 2;
                    low = get_u32(pc + idx * 8);
                    high = get_u32(pc + idx * 8 + 4);
                    if (c < low)
                        idx_max = idx - 1;
                    else if (c > high)
                        idx_min = idx + 1;
                    else
                        goto range32_match;
                }
                goto no_match;
            range32_match:
                pc += 8 * n;
            }
            break;
        case REOP_prev:
            /* go to the previous char */
            if (cptr == s->cbuf)
                goto no_match;
            PREV_CHAR(cptr, s->cbuf);
            break;
        case REOP_simple_greedy_quant:
            {
                uint32_t next_pos, quant_min, quant_max;
                size_t q;
                intptr_t res;
                const uint8_t *pc1;

                next_pos = get_u32(pc);
                quant_min = get_u32(pc + 4);
                quant_max = get_u32(pc + 8);
                pc += 16;
                pc1 = pc;
                pc += (int)next_pos;

                q = 0;
                for(;;) {
                    res = lre_exec_backtrack(s, capture, stack, stack_len,
                                             pc1, cptr, TRUE);
                    if (res == -1)
                        return res;
                    if (!res)
                        break;
                    cptr = (uint8_t *)res;
                    q++;
                    if (q >= quant_max && quant_max != INT32_MAX)
                        break;
                }
                if (q < quant_min)
                    goto no_match;
                if (q > quant_min) {
                    /* will examine all matches down to quant_min */
                    ret = push_state(s, capture, stack, stack_len,
                                     pc1 - 16, cptr,
                                     RE_EXEC_STATE_GREEDY_QUANT,
                                     q - quant_min);
                    if (ret < 0)
                        return -1;
                }
            }
            break;
        default:
            abort();
        }
    }
}

/* Return 1 if match, 0 if not match or -1 if error. cindex is the
   starting position of the match and must be such as 0 <= cindex <=
   clen. */
inline int lre_exec(uint8_t **capture,
                    const uint8_t *bc_buf, const uint8_t *cbuf, int cindex, int clen,
                    int cbuf_type, void *opaque)
{
    REExecContext s_s, *s = &s_s;
    int re_flags, i, alloca_size, ret;
    StackInt *stack_buf;

    re_flags = bc_buf[RE_HEADER_FLAGS];
    s->multi_line = (re_flags & LRE_FLAG_MULTILINE) != 0;
    s->ignore_case = (re_flags & LRE_FLAG_IGNORECASE) != 0;
    s->is_utf16 = (re_flags & LRE_FLAG_UTF16) != 0;
    s->capture_count = bc_buf[RE_HEADER_CAPTURE_COUNT];
    s->stack_size_max = bc_buf[RE_HEADER_STACK_SIZE];
    s->cbuf = cbuf;
    s->cbuf_end = cbuf + (clen << cbuf_type);
    s->cbuf_type = cbuf_type;
    if (s->cbuf_type == 1 && s->is_utf16)
        s->cbuf_type = 2;
    s->opaque = opaque;

    s->state_size = sizeof(REExecState) +
        s->capture_count * sizeof(capture[0]) * 2 +
        s->stack_size_max * sizeof(stack_buf[0]);
    s->state_stack = NULL;
    s->state_stack_len = 0;
    s->state_stack_size = 0;

    for(i = 0; i < s->capture_count * 2; i++)
        capture[i] = NULL;
    alloca_size = s->stack_size_max * sizeof(stack_buf[0]);
    stack_buf = (StackInt*) alloca(alloca_size);
    ret = lre_exec_backtrack(s, capture, stack_buf, 0, bc_buf + RE_HEADER_LEN,
                             cbuf + (cindex << cbuf_type), FALSE);
    lre_realloc(s->opaque, s->state_stack, 0);
    return ret;
}

inline int lre_get_capture_count(const uint8_t *bc_buf)
{
    return bc_buf[RE_HEADER_CAPTURE_COUNT];
}

inline int lre_get_flags(const uint8_t *bc_buf)
{
    return bc_buf[RE_HEADER_FLAGS];
}

/* Return NULL if no group names. Otherwise, return a pointer to
   'capture_count - 1' zero terminated UTF-8 strings. */
inline const char *lre_get_groupnames(const uint8_t *bc_buf)
{
    uint32_t re_bytecode_len;
    if ((lre_get_flags(bc_buf) & LRE_FLAG_NAMED_GROUPS) == 0)
        return NULL;
    re_bytecode_len = get_u32(bc_buf + 3);
    return (const char *)(bc_buf + 7 + re_bytecode_len);
}

struct list_head {
    struct list_head *prev;
    struct list_head *next;
};

#define LIST_HEAD_INIT(el) { &(el), &(el) }

/* return the pointer of type 'type *' containing 'el' as field 'member' */
#define list_entry(el, type, member) \
    ((type *)((uint8_t *)(el) - offsetof(type, member)))

static inline void init_list_head(struct list_head *head)
{
    head->prev = head;
    head->next = head;
}

/* insert 'el' between 'prev' and 'next' */
static inline void __list_add(struct list_head *el,
                              struct list_head *prev, struct list_head *next)
{
    prev->next = el;
    el->prev = prev;
    el->next = next;
    next->prev = el;
}

/* add 'el' at the head of the list 'head' (= after element head) */
static inline void list_add(struct list_head *el, struct list_head *head)
{
    __list_add(el, head, head->next);
}

/* add 'el' at the end of the list 'head' (= before element head) */
static inline void list_add_tail(struct list_head *el, struct list_head *head)
{
    __list_add(el, head->prev, head);
}

static inline void list_del(struct list_head *el)
{
    struct list_head *prev, *next;
    prev = el->prev;
    next = el->next;
    prev->next = next;
    next->prev = prev;
    el->prev = NULL; /* fail safe */
    el->next = NULL; /* fail safe */
}

static inline int list_empty(struct list_head *el)
{
    return el->next == el;
}

#define list_for_each(el, head) \
  for(el = (head)->next; el != (head); el = el->next)

#define list_for_each_safe(el, el1, head)                \
    for(el = (head)->next, el1 = el->next; el != (head); \
        el = el1, el1 = el->next)

#define list_for_each_prev(el, head) \
  for(el = (head)->prev; el != (head); el = el->prev)

#define list_for_each_prev_safe(el, el1, head)           \
    for(el = (head)->prev, el1 = el->prev; el != (head); \
        el = el1, el1 = el->prev)


enum {
    RUN_TYPE_U,
    RUN_TYPE_L,
    RUN_TYPE_UF,
    RUN_TYPE_LF,
    RUN_TYPE_UL,
    RUN_TYPE_LSU,
    RUN_TYPE_U2L_399_EXT2,
    RUN_TYPE_UF_D20,
    RUN_TYPE_UF_D1_EXT,
    RUN_TYPE_U_EXT,
    RUN_TYPE_LF_EXT,
    RUN_TYPE_U_EXT2,
    RUN_TYPE_L_EXT2,
    RUN_TYPE_U_EXT3,
};

/* conv_type:
   0 = to upper
   1 = to lower
   2 = case folding (= to lower with modifications)
*/
inline int lre_case_conv(uint32_t *res, uint32_t c, int conv_type)
{
    if (c < 128) {
        if (conv_type) {
            if (c >= 'A' && c <= 'Z') {
                c = c - 'A' + 'a';
            }
        } else {
            if (c >= 'a' && c <= 'z') {
                c = c - 'a' + 'A';
            }
        }
    } else {
        uint32_t v, code, data, type, len, a, is_lower;
        int idx, idx_min, idx_max;

        is_lower = (conv_type != 0);
        idx_min = 0;
        idx_max = countof(case_conv_table1) - 1;
        while (idx_min <= idx_max) {
            idx = (unsigned)(idx_max + idx_min) / 2;
            v = case_conv_table1[idx];
            code = v >> (32 - 17);
            len = (v >> (32 - 17 - 7)) & 0x7f;
            if (c < code) {
                idx_max = idx - 1;
            } else if (c >= code + len) {
                idx_min = idx + 1;
            } else {
                type = (v >> (32 - 17 - 7 - 4)) & 0xf;
                data = ((v & 0xf) << 8) | case_conv_table2[idx];
                switch(type) {
                case RUN_TYPE_U:
                case RUN_TYPE_L:
                case RUN_TYPE_UF:
                case RUN_TYPE_LF:
                    if (conv_type == (type & 1) ||
                        (type >= RUN_TYPE_UF && conv_type == 2)) {
                        c = c - code + (case_conv_table1[data] >> (32 - 17));
                    }
                    break;
                case RUN_TYPE_UL:
                    a = c - code;
                    if ((a & 1) != (1 - is_lower))
                        break;
                    c = (a ^ 1) + code;
                    break;
                case RUN_TYPE_LSU:
                    a = c - code;
                    if (a == 1) {
                        c += 2 * is_lower - 1;
                    } else if (a == (1 - is_lower) * 2) {
                        c += (2 * is_lower - 1) * 2;
                    }
                    break;
                case RUN_TYPE_U2L_399_EXT2:
                    if (!is_lower) {
                        res[0] = c - code + case_conv_ext[data >> 6];
                        res[1] = 0x399;
                        return 2;
                    } else {
                        c = c - code + case_conv_ext[data & 0x3f];
                    }
                    break;
                case RUN_TYPE_UF_D20:
                    if (conv_type == 1)
                        break;
                    c = data + (conv_type == 2) * 0x20;
                    break;
                case RUN_TYPE_UF_D1_EXT:
                    if (conv_type == 1)
                        break;
                    c = case_conv_ext[data] + (conv_type == 2);
                    break;
                case RUN_TYPE_U_EXT:
                case RUN_TYPE_LF_EXT:
                    if (is_lower != (type - RUN_TYPE_U_EXT))
                        break;
                    c = case_conv_ext[data];
                    break;
                case RUN_TYPE_U_EXT2:
                case RUN_TYPE_L_EXT2:
                    if (conv_type != (type - RUN_TYPE_U_EXT2))
                        break;
                    res[0] = c - code + case_conv_ext[data >> 6];
                    res[1] = case_conv_ext[data & 0x3f];
                    return 2;
                default:
                case RUN_TYPE_U_EXT3:
                    if (conv_type != 0)
                        break;
                    res[0] = case_conv_ext[data >> 8];
                    res[1] = case_conv_ext[(data >> 4) & 0xf];
                    res[2] = case_conv_ext[data & 0xf];
                    return 3;
                }
                break;
            }
        }
    }
    res[0] = c;
    return 1;
}

static uint32_t get_le24(const uint8_t *ptr)
{
#if defined(__x86__) || defined(__x86_64__)
    return *(uint16_t *)ptr | (ptr[2] << 16);
#else
    return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16);
#endif
}

static constexpr uint32_t UNICODE_INDEX_BLOCK_LEN = 32;

/* return -1 if not in table, otherwise the offset in the block */
static int get_index_pos(uint32_t *pcode, uint32_t c,
                         const uint8_t *index_table, int index_table_len)
{
    uint32_t code, v;
    int idx_min, idx_max, idx;

    idx_min = 0;
    v = get_le24(index_table);
    code = v & ((1 << 21) - 1);
    if (c < code) {
        *pcode = 0;
        return 0;
    }
    idx_max = index_table_len - 1;
    code = get_le24(index_table + idx_max * 3);
    if (c >= code)
        return -1;
    /* invariant: tab[idx_min] <= c < tab2[idx_max] */
    while ((idx_max - idx_min) > 1) {
        idx = (idx_max + idx_min) / 2;
        v = get_le24(index_table + idx * 3);
        code = v & ((1 << 21) - 1);
        if (c < code) {
            idx_max = idx;
        } else {
            idx_min = idx;
        }
    }
    v = get_le24(index_table + idx_min * 3);
    *pcode = v & ((1 << 21) - 1);
    return (idx_min + 1) * UNICODE_INDEX_BLOCK_LEN + (v >> 21);
}

static BOOL lre_is_in_table(uint32_t c, const uint8_t *table,
                            const uint8_t *index_table, int index_table_len)
{
    uint32_t code, b, bit;
    int pos;
    const uint8_t *p;

    pos = get_index_pos(&code, c, index_table, index_table_len);
    if (pos < 0)
        return FALSE; /* outside the table */
    p = table + pos;
    bit = 0;
    for(;;) {
        b = *p++;
        if (b < 64) {
            code += (b >> 3) + 1;
            if (c < code)
                return bit;
            bit ^= 1;
            code += (b & 7) + 1;
        } else if (b >= 0x80) {
            code += b - 0x80 + 1;
        } else if (b < 0x60) {
            code += (((b - 0x40) << 8) | p[0]) + 1;
            p++;
        } else {
            code += (((b - 0x60) << 16) | (p[0] << 8) | p[1]) + 1;
            p += 2;
        }
        if (c < code)
            return bit;
        bit ^= 1;
    }
}

inline BOOL lre_is_cased(uint32_t c)
{
    uint32_t v, code, len;
    int idx, idx_min, idx_max;

    idx_min = 0;
    idx_max = countof(case_conv_table1) - 1;
    while (idx_min <= idx_max) {
        idx = (unsigned)(idx_max + idx_min) / 2;
        v = case_conv_table1[idx];
        code = v >> (32 - 17);
        len = (v >> (32 - 17 - 7)) & 0x7f;
        if (c < code) {
            idx_max = idx - 1;
        } else if (c >= code + len) {
            idx_min = idx + 1;
        } else {
            return TRUE;
        }
    }
    return lre_is_in_table(c, unicode_prop_Cased1_table,
                           unicode_prop_Cased1_index,
                           sizeof(unicode_prop_Cased1_index) / 3);
}

inline BOOL lre_is_case_ignorable(uint32_t c)
{
    return lre_is_in_table(c, unicode_prop_Case_Ignorable_table,
                           unicode_prop_Case_Ignorable_index,
                           sizeof(unicode_prop_Case_Ignorable_index) / 3);
}

/* character range */

static void *cr_default_realloc(void *opaque, void *ptr, size_t size)
{
    return realloc(ptr, size);
}

inline void cr_init(CharRange *cr, void *mem_opaque, DynBufReallocFunc *realloc_func)
{
    cr->len = cr->size = 0;
    cr->points = NULL;
    cr->mem_opaque = mem_opaque;
    cr->realloc_func = realloc_func ? realloc_func : cr_default_realloc;
}

inline void cr_free(CharRange *cr)
{
    cr->realloc_func(cr->mem_opaque, cr->points, 0);
}

inline int cr_realloc(CharRange *cr, int size)
{
    int new_size;
    uint32_t *new_buf;

    if (size > cr->size) {
        new_size = max_int(size, cr->size * 3 / 2);
        new_buf = (uint32_t*) cr->realloc_func(cr->mem_opaque, cr->points,
                                   new_size * sizeof(cr->points[0]));
        if (!new_buf)
            return -1;
        cr->points = new_buf;
        cr->size = new_size;
    }
    return 0;
}

inline int cr_copy(CharRange *cr, const CharRange *cr1)
{
    if (cr_realloc(cr, cr1->len))
        return -1;
    memcpy(cr->points, cr1->points, sizeof(cr->points[0]) * cr1->len);
    cr->len = cr1->len;
    return 0;
}

/* merge consecutive intervals and remove empty intervals */
static void cr_compress(CharRange *cr)
{
    int i, j, k, len;
    uint32_t *pt;

    pt = cr->points;
    len = cr->len;
    i = 0;
    j = 0;
    k = 0;
    while ((i + 1) < len) {
        if (pt[i] == pt[i + 1]) {
            /* empty interval */
            i += 2;
        } else {
            j = i;
            while ((j + 3) < len && pt[j + 1] == pt[j + 2])
                j += 2;
            /* just copy */
            pt[k] = pt[i];
            pt[k + 1] = pt[j + 1];
            k += 2;
            i = j + 2;
        }
    }
    cr->len = k;
}

/* union or intersection */
inline int cr_op(CharRange *cr, const uint32_t *a_pt, int a_len,
          const uint32_t *b_pt, int b_len, int op)
{
    int a_idx, b_idx, is_in;
    uint32_t v;

    a_idx = 0;
    b_idx = 0;
    for(;;) {
        /* get one more point from a or b in increasing order */
        if (a_idx < a_len && b_idx < b_len) {
            if (a_pt[a_idx] < b_pt[b_idx]) {
                goto a_add;
            } else if (a_pt[a_idx] == b_pt[b_idx]) {
                v = a_pt[a_idx];
                a_idx++;
                b_idx++;
            } else {
                goto b_add;
            }
        } else if (a_idx < a_len) {
        a_add:
            v = a_pt[a_idx++];
        } else if (b_idx < b_len) {
        b_add:
            v = b_pt[b_idx++];
        } else {
            break;
        }
        /* add the point if the in/out status changes */
        switch(op) {
        case CR_OP_UNION:
            is_in = (a_idx & 1) | (b_idx & 1);
            break;
        case CR_OP_INTER:
            is_in = (a_idx & 1) & (b_idx & 1);
            break;
        case CR_OP_XOR:
            is_in = (a_idx & 1) ^ (b_idx & 1);
            break;
        default:
            abort();
        }
        if (is_in != (cr->len & 1)) {
            if (cr_add_point(cr, v))
                return -1;
        }
    }
    cr_compress(cr);
    return 0;
}

inline int cr_union1(CharRange *cr, const uint32_t *b_pt, int b_len)
{
    CharRange a = *cr;
    int ret;
    cr->len = 0;
    cr->size = 0;
    cr->points = NULL;
    ret = cr_op(cr, a.points, a.len, b_pt, b_len, CR_OP_UNION);
    cr_free(&a);
    return ret;
}

inline int cr_invert(CharRange *cr)
{
    int len;
    len = cr->len;
    if (cr_realloc(cr, len + 2))
        return -1;
    memmove(cr->points + 1, cr->points, len * sizeof(cr->points[0]));
    cr->points[0] = 0;
    cr->points[len + 1] = UINT32_MAX;
    cr->len = len + 2;
    cr_compress(cr);
    return 0;
}

#ifdef CONFIG_ALL_UNICODE

inline BOOL lre_is_id_start(uint32_t c)
{
    return lre_is_in_table(c, unicode_prop_ID_Start_table,
                           unicode_prop_ID_Start_index,
                           sizeof(unicode_prop_ID_Start_index) / 3);
}

inline BOOL lre_is_id_continue(uint32_t c)
{
    return lre_is_id_start(c) ||
        lre_is_in_table(c, unicode_prop_ID_Continue1_table,
                        unicode_prop_ID_Continue1_index,
                        sizeof(unicode_prop_ID_Continue1_index) / 3);
}

static constexpr uint32_t UNICODE_DECOMP_LEN_MAX = 18;

typedef enum {
    DECOMP_TYPE_C1, /* 16 bit char */
    DECOMP_TYPE_L1, /* 16 bit char table */
    DECOMP_TYPE_L2,
    DECOMP_TYPE_L3,
    DECOMP_TYPE_L4,
    DECOMP_TYPE_L5, /* XXX: not used */
    DECOMP_TYPE_L6, /* XXX: could remove */
    DECOMP_TYPE_L7, /* XXX: could remove */
    DECOMP_TYPE_LL1, /* 18 bit char table */
    DECOMP_TYPE_LL2,
    DECOMP_TYPE_S1, /* 8 bit char table */
    DECOMP_TYPE_S2,
    DECOMP_TYPE_S3,
    DECOMP_TYPE_S4,
    DECOMP_TYPE_S5,
    DECOMP_TYPE_I1, /* increment 16 bit char value */
    DECOMP_TYPE_I2_0,
    DECOMP_TYPE_I2_1,
    DECOMP_TYPE_I3_1,
    DECOMP_TYPE_I3_2,
    DECOMP_TYPE_I4_1,
    DECOMP_TYPE_I4_2,
    DECOMP_TYPE_B1, /* 16 bit base + 8 bit offset */
    DECOMP_TYPE_B2,
    DECOMP_TYPE_B3,
    DECOMP_TYPE_B4,
    DECOMP_TYPE_B5,
    DECOMP_TYPE_B6,
    DECOMP_TYPE_B7,
    DECOMP_TYPE_B8,
    DECOMP_TYPE_B18,
    DECOMP_TYPE_LS2,
    DECOMP_TYPE_PAT3,
    DECOMP_TYPE_S2_UL,
    DECOMP_TYPE_LS2_UL,
} DecompTypeEnum;

static uint32_t unicode_get_short_code(uint32_t c)
{
    static const uint16_t unicode_short_table[2] = { 0x2044, 0x2215 };

    if (c < 0x80)
        return c;
    else if (c < 0x80 + 0x50)
        return c - 0x80 + 0x300;
    else
        return unicode_short_table[c - 0x80 - 0x50];
}

static uint32_t unicode_get_lower_simple(uint32_t c)
{
    if (c < 0x100 || (c >= 0x410 && c <= 0x42f))
        c += 0x20;
    else
        c++;
    return c;
}

static uint16_t unicode_get16(const uint8_t *p)
{
    return p[0] | (p[1] << 8);
}

static int unicode_decomp_entry(uint32_t *res, uint32_t c,
                                int idx, uint32_t code, uint32_t len,
                                uint32_t type)
{
    uint32_t c1;
    int l, i, p;
    const uint8_t *d;

    if (type == DECOMP_TYPE_C1) {
        res[0] = unicode_decomp_table2[idx];
        return 1;
    } else {
        d = unicode_decomp_data + unicode_decomp_table2[idx];
        switch(type) {
        case DECOMP_TYPE_L1:
        case DECOMP_TYPE_L2:
        case DECOMP_TYPE_L3:
        case DECOMP_TYPE_L4:
        case DECOMP_TYPE_L5:
        case DECOMP_TYPE_L6:
        case DECOMP_TYPE_L7:
            l = type - DECOMP_TYPE_L1 + 1;
            d += (c - code) * l * 2;
            for(i = 0; i < l; i++) {
                if ((res[i] = unicode_get16(d + 2 * i)) == 0)
                    return 0;
            }
            return l;
        case DECOMP_TYPE_LL1:
        case DECOMP_TYPE_LL2:
            {
                uint32_t k, p;
                l = type - DECOMP_TYPE_LL1 + 1;
                k = (c - code) * l;
                p = len * l * 2;
                for(i = 0; i < l; i++) {
                    c1 = unicode_get16(d + 2 * k) |
                        (((d[p + (k / 4)] >> ((k % 4) * 2)) & 3) << 16);
                    if (!c1)
                        return 0;
                    res[i] = c1;
                    k++;
                }
            }
            return l;
        case DECOMP_TYPE_S1:
        case DECOMP_TYPE_S2:
        case DECOMP_TYPE_S3:
        case DECOMP_TYPE_S4:
        case DECOMP_TYPE_S5:
            l = type - DECOMP_TYPE_S1 + 1;
            d += (c - code) * l;
            for(i = 0; i < l; i++) {
                if ((res[i] = unicode_get_short_code(d[i])) == 0)
                    return 0;
            }
            return l;
        case DECOMP_TYPE_I1:
            l = 1;
            p = 0;
            goto decomp_type_i;
        case DECOMP_TYPE_I2_0:
        case DECOMP_TYPE_I2_1:
        case DECOMP_TYPE_I3_1:
        case DECOMP_TYPE_I3_2:
        case DECOMP_TYPE_I4_1:
        case DECOMP_TYPE_I4_2:
            l = 2 + ((type - DECOMP_TYPE_I2_0) >> 1);
            p = ((type - DECOMP_TYPE_I2_0) & 1) + (l > 2);
        decomp_type_i:
            for(i = 0; i < l; i++) {
                c1 = unicode_get16(d + 2 * i);
                if (i == p)
                    c1 += c - code;
                res[i] = c1;
            }
            return l;
        case DECOMP_TYPE_B18:
            l = 18;
            goto decomp_type_b;
        case DECOMP_TYPE_B1:
        case DECOMP_TYPE_B2:
        case DECOMP_TYPE_B3:
        case DECOMP_TYPE_B4:
        case DECOMP_TYPE_B5:
        case DECOMP_TYPE_B6:
        case DECOMP_TYPE_B7:
        case DECOMP_TYPE_B8:
            l = type - DECOMP_TYPE_B1 + 1;
        decomp_type_b:
            {
                uint32_t c_min;
                c_min = unicode_get16(d);
                d += 2 + (c - code) * l;
                for(i = 0; i < l; i++) {
                    c1 = d[i];
                    if (c1 == 0xff)
                        c1 = 0x20;
                    else
                        c1 += c_min;
                    res[i] = c1;
                }
            }
            return l;
        case DECOMP_TYPE_LS2:
            d += (c - code) * 3;
            if (!(res[0] = unicode_get16(d)))
                return 0;
            res[1] = unicode_get_short_code(d[2]);
            return 2;
        case DECOMP_TYPE_PAT3:
            res[0] = unicode_get16(d);
            res[2] = unicode_get16(d + 2);
            d += 4 + (c - code) * 2;
            res[1] = unicode_get16(d);
            return 3;
        case DECOMP_TYPE_S2_UL:
        case DECOMP_TYPE_LS2_UL:
            c1 = c - code;
            if (type == DECOMP_TYPE_S2_UL) {
                d += c1 & ~1;
                c = unicode_get_short_code(*d);
                d++;
            } else {
                d += (c1 >> 1) * 3;
                c = unicode_get16(d);
                d += 2;
            }
            if (c1 & 1)
                c = unicode_get_lower_simple(c);
            res[0] = c;
            res[1] = unicode_get_short_code(*d);
            return 2;
        }
    }
    return 0;
}


/* return the length of the decomposition (length <=
   UNICODE_DECOMP_LEN_MAX) or 0 if no decomposition */
static int unicode_decomp_char(uint32_t *res, uint32_t c, BOOL is_compat1)
{
    uint32_t v, type, is_compat, code, len;
    int idx_min, idx_max, idx;

    idx_min = 0;
    idx_max = countof(unicode_decomp_table1) - 1;
    while (idx_min <= idx_max) {
        idx = (idx_max + idx_min) / 2;
        v = unicode_decomp_table1[idx];
        code = v >> (32 - 18);
        len = (v >> (32 - 18 - 7)) & 0x7f;
        //        printf("idx=%d code=%05x len=%d\n", idx, code, len);
        if (c < code) {
            idx_max = idx - 1;
        } else if (c >= code + len) {
            idx_min = idx + 1;
        } else {
            is_compat = v & 1;
            if (is_compat1 < is_compat)
                break;
            type = (v >> (32 - 18 - 7 - 6)) & 0x3f;
            return unicode_decomp_entry(res, c, idx, code, len, type);
        }
    }
    return 0;
}

/* return 0 if no pair found */
static int unicode_compose_pair(uint32_t c0, uint32_t c1)
{
    uint32_t code, len, type, v, idx1, d_idx, d_offset, ch;
    int idx_min, idx_max, idx, d;
    uint32_t pair[2];

    idx_min = 0;
    idx_max = countof(unicode_comp_table) - 1;
    while (idx_min <= idx_max) {
        idx = (idx_max + idx_min) / 2;
        idx1 = unicode_comp_table[idx];

        /* idx1 represent an entry of the decomposition table */
        d_idx = idx1 >> 6;
        d_offset = idx1 & 0x3f;
        v = unicode_decomp_table1[d_idx];
        code = v >> (32 - 18);
        len = (v >> (32 - 18 - 7)) & 0x7f;
        type = (v >> (32 - 18 - 7 - 6)) & 0x3f;
        ch = code + d_offset;
        unicode_decomp_entry(pair, ch, d_idx, code, len, type);
        d = c0 - pair[0];
        if (d == 0)
            d = c1 - pair[1];
        if (d < 0) {
            idx_max = idx - 1;
        } else if (d > 0) {
            idx_min = idx + 1;
        } else {
            return ch;
        }
    }
    return 0;
}

/* return the combining class of character c (between 0 and 255) */
static int unicode_get_cc(uint32_t c)
{
    uint32_t code, n, type, cc, c1, b;
    int pos;
    const uint8_t *p;

    pos = get_index_pos(&code, c,
                        unicode_cc_index, sizeof(unicode_cc_index) / 3);
    if (pos < 0)
        return 0;
    p = unicode_cc_table + pos;
    for(;;) {
        b = *p++;
        type = b >> 6;
        n = b & 0x3f;
        if (n < 48) {
        } else if (n < 56) {
            n = (n - 48) << 8;
            n |= *p++;
            n += 48;
        } else {
            n = (n - 56) << 8;
            n |= *p++ << 8;
            n |= *p++;
            n += 48 + (1 << 11);
        }
        if (type <= 1)
            p++;
        c1 = code + n + 1;
        if (c < c1) {
            switch(type) {
            case 0:
                cc = p[-1];
                break;
            case 1:
                cc = p[-1] + c - code;
                break;
            case 2:
                cc = 0;
                break;
            default:
            case 3:
                cc = 230;
                break;
            }
            return cc;
        }
        code = c1;
    }
}

static void sort_cc(int *buf, int len)
{
    int i, j, k, cc, cc1, start, ch1;

    for(i = 0; i < len; i++) {
        cc = unicode_get_cc(buf[i]);
        if (cc != 0) {
            start = i;
            j = i + 1;
            while (j < len) {
                ch1 = buf[j];
                cc1 = unicode_get_cc(ch1);
                if (cc1 == 0)
                    break;
                k = j - 1;
                while (k >= start) {
                    if (unicode_get_cc(buf[k]) <= cc1)
                        break;
                    buf[k + 1] = buf[k];
                    k--;
                }
                buf[k + 1] = ch1;
                j++;
            }
#if 0
            printf("cc:");
            for(k = start; k < j; k++) {
                printf(" %3d", unicode_get_cc(buf[k]));
            }
            printf("\n");
#endif
            i = j;
        }
    }
}

static void to_nfd_rec(DynBuf *dbuf,
                       const int *src, int src_len, int is_compat)
{
    uint32_t c, v;
    int i, l;
    uint32_t res[UNICODE_DECOMP_LEN_MAX];

    for(i = 0; i < src_len; i++) {
        c = src[i];
        if (c >= 0xac00 && c < 0xd7a4) {
            /* Hangul decomposition */
            c -= 0xac00;
            dbuf_put_u32(dbuf, 0x1100 + c / 588);
            dbuf_put_u32(dbuf, 0x1161 + (c % 588) / 28);
            v = c % 28;
            if (v != 0)
                dbuf_put_u32(dbuf, 0x11a7 + v);
        } else {
            l = unicode_decomp_char(res, c, is_compat);
            if (l) {
                to_nfd_rec(dbuf, (int *)res, l, is_compat);
            } else {
                dbuf_put_u32(dbuf, c);
            }
        }
    }
}

/* return 0 if not found */
static int compose_pair(uint32_t c0, uint32_t c1)
{
    /* Hangul composition */
    if (c0 >= 0x1100 && c0 < 0x1100 + 19 &&
        c1 >= 0x1161 && c1 < 0x1161 + 21) {
        return 0xac00 + (c0 - 0x1100) * 588 + (c1 - 0x1161) * 28;
    } else if (c0 >= 0xac00 && c0 < 0xac00 + 11172 &&
               (c0 - 0xac00) % 28 == 0 &&
               c1 >= 0x11a7 && c1 < 0x11a7 + 28) {
        return c0 + c1 - 0x11a7;
    } else {
        return unicode_compose_pair(c0, c1);
    }
}

inline int unicode_normalize(uint32_t **pdst, const uint32_t *src, int src_len,
                      UnicodeNormalizationEnum n_type,
                      void *opaque, DynBufReallocFunc *realloc_func)
{
    int *buf, buf_len, i, p, starter_pos, cc, last_cc, out_len;
    BOOL is_compat;
    DynBuf dbuf_s, *dbuf = &dbuf_s;

    is_compat = n_type >> 1;

    dbuf_init2(dbuf, opaque, realloc_func);
    if (dbuf_realloc(dbuf, sizeof(int) * src_len))
        goto fail;

    /* common case: latin1 is unaffected by NFC */
    if (n_type == UNICODE_NFC) {
        for(i = 0; i < src_len; i++) {
            if (src[i] >= 0x100)
                goto not_latin1;
        }
        buf = (int *)dbuf->buf;
        memcpy(buf, src, src_len * sizeof(int));
        *pdst = (uint32_t *)buf;
        return src_len;
    not_latin1: ;
    }

    to_nfd_rec(dbuf, (const int *)src, src_len, is_compat);
    if (dbuf_error(dbuf)) {
    fail:
        *pdst = NULL;
        return -1;
    }
    buf = (int *)dbuf->buf;
    buf_len = dbuf->size / sizeof(int);

    sort_cc(buf, buf_len);

    if (buf_len <= 1 || (n_type & 1) != 0) {
        /* NFD / NFKD */
        *pdst = (uint32_t *)buf;
        return buf_len;
    }

    i = 1;
    out_len = 1;
    while (i < buf_len) {
        /* find the starter character and test if it is blocked from
           the character at 'i' */
        last_cc = unicode_get_cc(buf[i]);
        starter_pos = out_len - 1;
        while (starter_pos >= 0) {
            cc = unicode_get_cc(buf[starter_pos]);
            if (cc == 0)
                break;
            if (cc >= last_cc)
                goto next;
            last_cc = 256;
            starter_pos--;
        }
        if (starter_pos >= 0 &&
            (p = compose_pair(buf[starter_pos], buf[i])) != 0) {
            buf[starter_pos] = p;
            i++;
        } else {
        next:
            buf[out_len++] = buf[i++];
        }
    }
    *pdst = (uint32_t *)buf;
    return out_len;
}

/* char ranges for various unicode properties */

static int unicode_find_name(const char *name_table, const char *name)
{
    const char *p, *r;
    int pos;
    size_t name_len, len;

    p = name_table;
    pos = 0;
    name_len = strlen(name);
    while (*p) {
        for(;;) {
            r = strchr(p, ',');
            if (!r)
                len = strlen(p);
            else
                len = r - p;
            if (len == name_len && !memcmp(p, name, name_len))
                return pos;
            p += len + 1;
            if (!r)
                break;
        }
        pos++;
    }
    return -1;
}

/* 'cr' must be initialized and empty. Return 0 if OK, -1 if error, -2
   if not found */
inline int unicode_script(CharRange *cr,
                   const char *script_name, BOOL is_ext)
{
    int script_idx;
    const uint8_t *p, *p_end;
    uint32_t c, c1, b, n, v, v_len, i, type;
    CharRange cr1_s, *cr1;
    CharRange cr2_s, *cr2 = &cr2_s;
    BOOL is_common;

    script_idx = unicode_find_name(unicode_script_name_table, script_name);
    if (script_idx < 0)
        return -2;
    /* Note: we remove the "Unknown" Script */
    script_idx += UNICODE_SCRIPT_Unknown + 1;

    is_common = (script_idx == UNICODE_SCRIPT_Common ||
                 script_idx == UNICODE_SCRIPT_Inherited);
    if (is_ext) {
        cr1 = &cr1_s;
        cr_init(cr1, cr->mem_opaque, cr->realloc_func);
        cr_init(cr2, cr->mem_opaque, cr->realloc_func);
    } else {
        cr1 = cr;
    }

    p = unicode_script_table;
    p_end = unicode_script_table + countof(unicode_script_table);
    c = 0;
    while (p < p_end) {
        b = *p++;
        type = b >> 7;
        n = b & 0x7f;
        if (n < 96) {
        } else if (n < 112) {
            n = (n - 96) << 8;
            n |= *p++;
            n += 96;
        } else {
            n = (n - 112) << 16;
            n |= *p++ << 8;
            n |= *p++;
            n += 96 + (1 << 12);
        }
        if (type == 0)
            v = 0;
        else
            v = *p++;
        c1 = c + n + 1;
        if (v == script_idx) {
            if (cr_add_interval(cr1, c, c1))
                goto fail;
        }
        c = c1;
    }

    if (is_ext) {
        /* add the script extensions */
        p = unicode_script_ext_table;
        p_end = unicode_script_ext_table + countof(unicode_script_ext_table);
        c = 0;
        while (p < p_end) {
            b = *p++;
            if (b < 128) {
                n = b;
            } else if (b < 128 + 64) {
                n = (b - 128) << 8;
                n |= *p++;
                n += 128;
            } else {
                n = (b - 128 - 64) << 16;
                n |= *p++ << 8;
                n |= *p++;
                n += 128 + (1 << 14);
            }
            c1 = c + n + 1;
            v_len = *p++;
            if (is_common) {
                if (v_len != 0) {
                    if (cr_add_interval(cr2, c, c1))
                        goto fail;
                }
            } else {
                for(i = 0; i < v_len; i++) {
                    if (p[i] == script_idx) {
                        if (cr_add_interval(cr2, c, c1))
                            goto fail;
                        break;
                    }
                }
            }
            p += v_len;
            c = c1;
        }
        if (is_common) {
            /* remove all the characters with script extensions */
            if (cr_invert(cr2))
                goto fail;
            if (cr_op(cr, cr1->points, cr1->len, cr2->points, cr2->len,
                      CR_OP_INTER))
                goto fail;
        } else {
            if (cr_op(cr, cr1->points, cr1->len, cr2->points, cr2->len,
                      CR_OP_UNION))
                goto fail;
        }
        cr_free(cr1);
        cr_free(cr2);
    }
    return 0;
 fail:
    if (is_ext) {
        cr_free(cr1);
        cr_free(cr2);
    }
    goto fail;
}

#define M(id) (1U << UNICODE_GC_ ## id)

static int unicode_general_category1(CharRange *cr, uint32_t gc_mask)
{
    const uint8_t *p, *p_end;
    uint32_t c, c0, b, n, v;

    p = unicode_gc_table;
    p_end = unicode_gc_table + countof(unicode_gc_table);
    c = 0;
    while (p < p_end) {
        b = *p++;
        n = b >> 5;
        v = b & 0x1f;
        if (n == 7) {
            n = *p++;
            if (n < 128) {
                n += 7;
            } else if (n < 128 + 64) {
                n = (n - 128) << 8;
                n |= *p++;
                n += 7 + 128;
            } else {
                n = (n - 128 - 64) << 16;
                n |= *p++ << 8;
                n |= *p++;
                n += 7 + 128 + (1 << 14);
            }
        }
        c0 = c;
        c += n + 1;
        if (v == 31) {
            /* run of Lu / Ll */
            b = gc_mask & (M(Lu) | M(Ll));
            if (b != 0) {
                if (b == (M(Lu) | M(Ll))) {
                    goto add_range;
                } else {
                    c0 += ((gc_mask & M(Ll)) != 0);
                    for(; c0 < c; c0 += 2) {
                        if (cr_add_interval(cr, c0, c0 + 1))
                            return -1;
                    }
                }
            }
        } else if ((gc_mask >> v) & 1) {
        add_range:
            if (cr_add_interval(cr, c0, c))
                return -1;
        }
    }
    return 0;
}

static int unicode_prop1(CharRange *cr, int prop_idx)
{
    const uint8_t *p, *p_end;
    uint32_t c, c0, b, bit;

    p = unicode_prop_table[prop_idx];
    p_end = p + unicode_prop_len_table[prop_idx];
    c = 0;
    bit = 0;
    while (p < p_end) {
        c0 = c;
        b = *p++;
        if (b < 64) {
            c += (b >> 3) + 1;
            if (bit)  {
                if (cr_add_interval(cr, c0, c))
                    return -1;
            }
            bit ^= 1;
            c0 = c;
            c += (b & 7) + 1;
        } else if (b >= 0x80) {
            c += b - 0x80 + 1;
        } else if (b < 0x60) {
            c += (((b - 0x40) << 8) | p[0]) + 1;
            p++;
        } else {
            c += (((b - 0x60) << 16) | (p[0] << 8) | p[1]) + 1;
            p += 2;
        }
        if (bit)  {
            if (cr_add_interval(cr, c0, c))
                return -1;
        }
        bit ^= 1;
    }
    return 0;
}

enum
{
    CASE_U = (1 << 0),
    CASE_L = (1 << 1),
    CASE_F = (1 << 2)
};

/* use the case conversion table to generate range of characters.
   CASE_U: set char if modified by uppercasing,
   CASE_L: set char if modified by lowercasing,
   CASE_F: set char if modified by case folding,
 */
static int unicode_case1(CharRange *cr, int case_mask)
{
#define MR(x) (1 << RUN_TYPE_ ## x)
    const uint32_t tab_run_mask[3] = {
        MR(U) | MR(UF) | MR(UL) | MR(LSU) | MR(U2L_399_EXT2) | MR(UF_D20) |
        MR(UF_D1_EXT) | MR(U_EXT) | MR(U_EXT2) | MR(U_EXT3),

        MR(L) | MR(LF) | MR(UL) | MR(LSU) | MR(U2L_399_EXT2) | MR(LF_EXT) | MR(L_EXT2),

        MR(UF) | MR(LF) | MR(UL) | MR(LSU) | MR(U2L_399_EXT2) | MR(LF_EXT) | MR(UF_D20) | MR(UF_D1_EXT) | MR(LF_EXT),
    };
#undef MR
    uint32_t mask, v, code, type, len, i, idx;

    if (case_mask == 0)
        return 0;
    mask = 0;
    for(i = 0; i < 3; i++) {
        if ((case_mask >> i) & 1)
            mask |= tab_run_mask[i];
    }
    for(idx = 0; idx < countof(case_conv_table1); idx++) {
        v = case_conv_table1[idx];
        type = (v >> (32 - 17 - 7 - 4)) & 0xf;
        code = v >> (32 - 17);
        len = (v >> (32 - 17 - 7)) & 0x7f;
        if ((mask >> type) & 1) {
            //            printf("%d: type=%d %04x %04x\n", idx, type, code, code + len - 1);
            switch(type) {
            case RUN_TYPE_UL:
                if ((case_mask & CASE_U) && (case_mask & (CASE_L | CASE_F)))
                    goto def_case;
                code += ((case_mask & CASE_U) != 0);
                for(i = 0; i < len; i += 2) {
                    if (cr_add_interval(cr, code + i, code + i + 1))
                        return -1;
                }
                break;
            case RUN_TYPE_LSU:
                if ((case_mask & CASE_U) && (case_mask & (CASE_L | CASE_F)))
                    goto def_case;
                if (!(case_mask & CASE_U)) {
                    if (cr_add_interval(cr, code, code + 1))
                        return -1;
                }
                if (cr_add_interval(cr, code + 1, code + 2))
                    return -1;
                if (case_mask & CASE_U) {
                    if (cr_add_interval(cr, code + 2, code + 3))
                        return -1;
                }
                break;
            default:
            def_case:
                if (cr_add_interval(cr, code, code + len))
                    return -1;
                break;
            }
        }
    }
    return 0;
}

typedef enum {
    POP_GC,
    POP_PROP,
    POP_CASE,
    POP_UNION,
    POP_INTER,
    POP_XOR,
    POP_INVERT,
    POP_END,
} PropOPEnum;

static constexpr int POP_STACK_LEN_MAX = 4;

static int unicode_prop_ops(CharRange *cr, ...)
{
    va_list ap;
    CharRange stack[POP_STACK_LEN_MAX];
    int stack_len, op, ret, i;
    uint32_t a;

    va_start(ap, cr);
    stack_len = 0;
    for(;;) {
        op = va_arg(ap, int);
        switch(op) {
        case POP_GC:
            assert(stack_len < POP_STACK_LEN_MAX);
            a = va_arg(ap, int);
            cr_init(&stack[stack_len++], cr->mem_opaque, cr->realloc_func);
            if (unicode_general_category1(&stack[stack_len - 1], a))
                goto fail;
            break;
        case POP_PROP:
            assert(stack_len < POP_STACK_LEN_MAX);
            a = va_arg(ap, int);
            cr_init(&stack[stack_len++], cr->mem_opaque, cr->realloc_func);
            if (unicode_prop1(&stack[stack_len - 1], a))
                goto fail;
            break;
        case POP_CASE:
            assert(stack_len < POP_STACK_LEN_MAX);
            a = va_arg(ap, int);
            cr_init(&stack[stack_len++], cr->mem_opaque, cr->realloc_func);
            if (unicode_case1(&stack[stack_len - 1], a))
                goto fail;
            break;
        case POP_UNION:
        case POP_INTER:
        case POP_XOR:
            {
                CharRange *cr1, *cr2, *cr3;
                assert(stack_len >= 2);
                assert(stack_len < POP_STACK_LEN_MAX);
                cr1 = &stack[stack_len - 2];
                cr2 = &stack[stack_len - 1];
                cr3 = &stack[stack_len++];
                cr_init(cr3, cr->mem_opaque, cr->realloc_func);
                if (cr_op(cr3, cr1->points, cr1->len,
                          cr2->points, cr2->len, op - POP_UNION + CR_OP_UNION))
                    goto fail;
                cr_free(cr1);
                cr_free(cr2);
                *cr1 = *cr3;
                stack_len -= 2;
            }
            break;
        case POP_INVERT:
            assert(stack_len >= 1);
            if (cr_invert(&stack[stack_len - 1]))
                goto fail;
            break;
        case POP_END:
            goto done;
        default:
            abort();
        }
    }
 done:
    assert(stack_len == 1);
    ret = cr_copy(cr, &stack[0]);
    cr_free(&stack[0]);
    return ret;
 fail:
    for(i = 0; i < stack_len; i++)
        cr_free(&stack[i]);
    return -1;
}

static const uint32_t unicode_gc_mask_table[] = {
    M(Lu) | M(Ll) | M(Lt), /* LC */
    M(Lu) | M(Ll) | M(Lt) | M(Lm) | M(Lo), /* L */
    M(Mn) | M(Mc) | M(Me), /* M */
    M(Nd) | M(Nl) | M(No), /* N */
    M(Sm) | M(Sc) | M(Sk) | M(So), /* S */
    M(Pc) | M(Pd) | M(Ps) | M(Pe) | M(Pi) | M(Pf) | M(Po), /* P */
    M(Zs) | M(Zl) | M(Zp), /* Z */
    M(Cc) | M(Cf) | M(Cs) | M(Co) | M(Cn), /* C */
};

/* 'cr' must be initialized and empty. Return 0 if OK, -1 if error, -2
   if not found */
inline int unicode_general_category(CharRange *cr, const char *gc_name)
{
    int gc_idx;
    uint32_t gc_mask;

    gc_idx = unicode_find_name(unicode_gc_name_table, gc_name);
    if (gc_idx < 0)
        return -2;
    if (gc_idx <= UNICODE_GC_Co) {
        gc_mask = (uint64_t)1 << gc_idx;
    } else {
        gc_mask = unicode_gc_mask_table[gc_idx - UNICODE_GC_LC];
    }
    return unicode_general_category1(cr, gc_mask);
}


/* 'cr' must be initialized and empty. Return 0 if OK, -1 if error, -2
   if not found */
inline int unicode_prop(CharRange *cr, const char *prop_name)
{
    int prop_idx, ret;

    prop_idx = unicode_find_name(unicode_prop_name_table, prop_name);
    if (prop_idx < 0)
        return -2;
    prop_idx += UNICODE_PROP_ASCII_Hex_Digit;

    ret = 0;
    switch(prop_idx) {
    case UNICODE_PROP_ASCII:
        if (cr_add_interval(cr, 0x00, 0x7f + 1))
            return -1;
        break;
    case UNICODE_PROP_Any:
        if (cr_add_interval(cr, 0x00000, 0x10ffff + 1))
            return -1;
        break;
    case UNICODE_PROP_Assigned:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Cn),
                               POP_INVERT,
                               POP_END);
        break;
    case UNICODE_PROP_Math:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Sm),
                               POP_PROP, UNICODE_PROP_Other_Math,
                               POP_UNION,
                               POP_END);
        break;
    case UNICODE_PROP_Lowercase:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Ll),
                               POP_PROP, UNICODE_PROP_Other_Lowercase,
                               POP_UNION,
                               POP_END);
        break;
    case UNICODE_PROP_Uppercase:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Lu),
                               POP_PROP, UNICODE_PROP_Other_Uppercase,
                               POP_UNION,
                               POP_END);
        break;
    case UNICODE_PROP_Cased:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Lu) | M(Ll) | M(Lt),
                               POP_PROP, UNICODE_PROP_Other_Uppercase,
                               POP_UNION,
                               POP_PROP, UNICODE_PROP_Other_Lowercase,
                               POP_UNION,
                               POP_END);
        break;
    case UNICODE_PROP_Alphabetic:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Lu) | M(Ll) | M(Lt) | M(Lm) | M(Lo) | M(Nl),
                               POP_PROP, UNICODE_PROP_Other_Uppercase,
                               POP_UNION,
                               POP_PROP, UNICODE_PROP_Other_Lowercase,
                               POP_UNION,
                               POP_PROP, UNICODE_PROP_Other_Alphabetic,
                               POP_UNION,
                               POP_END);
        break;
    case UNICODE_PROP_Grapheme_Base:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Cc) | M(Cf) | M(Cs) | M(Co) | M(Cn) | M(Zl) | M(Zp) | M(Me) | M(Mn),
                               POP_PROP, UNICODE_PROP_Other_Grapheme_Extend,
                               POP_UNION,
                               POP_INVERT,
                               POP_END);
        break;
    case UNICODE_PROP_Grapheme_Extend:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Me) | M(Mn),
                               POP_PROP, UNICODE_PROP_Other_Grapheme_Extend,
                               POP_UNION,
                               POP_END);
        break;
    case UNICODE_PROP_XID_Start:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Lu) | M(Ll) | M(Lt) | M(Lm) | M(Lo) | M(Nl),
                               POP_PROP, UNICODE_PROP_Other_ID_Start,
                               POP_UNION,
                               POP_PROP, UNICODE_PROP_Pattern_Syntax,
                               POP_PROP, UNICODE_PROP_Pattern_White_Space,
                               POP_UNION,
                               POP_PROP, UNICODE_PROP_XID_Start1,
                               POP_UNION,
                               POP_INVERT,
                               POP_INTER,
                               POP_END);
        break;
    case UNICODE_PROP_XID_Continue:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Lu) | M(Ll) | M(Lt) | M(Lm) | M(Lo) | M(Nl) |
                               M(Mn) | M(Mc) | M(Nd) | M(Pc),
                               POP_PROP, UNICODE_PROP_Other_ID_Start,
                               POP_UNION,
                               POP_PROP, UNICODE_PROP_Other_ID_Continue,
                               POP_UNION,
                               POP_PROP, UNICODE_PROP_Pattern_Syntax,
                               POP_PROP, UNICODE_PROP_Pattern_White_Space,
                               POP_UNION,
                               POP_PROP, UNICODE_PROP_XID_Continue1,
                               POP_UNION,
                               POP_INVERT,
                               POP_INTER,
                               POP_END);
        break;
    case UNICODE_PROP_Changes_When_Uppercased:
        ret = unicode_case1(cr, CASE_U);
        break;
    case UNICODE_PROP_Changes_When_Lowercased:
        ret = unicode_case1(cr, CASE_L);
        break;
    case UNICODE_PROP_Changes_When_Casemapped:
        ret = unicode_case1(cr, CASE_U | CASE_L | CASE_F);
        break;
    case UNICODE_PROP_Changes_When_Titlecased:
        ret = unicode_prop_ops(cr,
                               POP_CASE, CASE_U,
                               POP_PROP, UNICODE_PROP_Changes_When_Titlecased1,
                               POP_XOR,
                               POP_END);
        break;
    case UNICODE_PROP_Changes_When_Casefolded:
        ret = unicode_prop_ops(cr,
                               POP_CASE, CASE_F,
                               POP_PROP, UNICODE_PROP_Changes_When_Casefolded1,
                               POP_XOR,
                               POP_END);
        break;
    case UNICODE_PROP_Changes_When_NFKC_Casefolded:
        ret = unicode_prop_ops(cr,
                               POP_CASE, CASE_F,
                               POP_PROP, UNICODE_PROP_Changes_When_NFKC_Casefolded1,
                               POP_XOR,
                               POP_END);
        break;
#if 0
    case UNICODE_PROP_ID_Start:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Lu) | M(Ll) | M(Lt) | M(Lm) | M(Lo) | M(Nl),
                               POP_PROP, UNICODE_PROP_Other_ID_Start,
                               POP_UNION,
                               POP_PROP, UNICODE_PROP_Pattern_Syntax,
                               POP_PROP, UNICODE_PROP_Pattern_White_Space,
                               POP_UNION,
                               POP_INVERT,
                               POP_INTER,
                               POP_END);
        break;
    case UNICODE_PROP_ID_Continue:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Lu) | M(Ll) | M(Lt) | M(Lm) | M(Lo) | M(Nl) |
                               M(Mn) | M(Mc) | M(Nd) | M(Pc),
                               POP_PROP, UNICODE_PROP_Other_ID_Start,
                               POP_UNION,
                               POP_PROP, UNICODE_PROP_Other_ID_Continue,
                               POP_UNION,
                               POP_PROP, UNICODE_PROP_Pattern_Syntax,
                               POP_PROP, UNICODE_PROP_Pattern_White_Space,
                               POP_UNION,
                               POP_INVERT,
                               POP_INTER,
                               POP_END);
        break;
    case UNICODE_PROP_Case_Ignorable:
        ret = unicode_prop_ops(cr,
                               POP_GC, M(Mn) | M(Cf) | M(Lm) | M(Sk),
                               POP_PROP, UNICODE_PROP_Case_Ignorable1,
                               POP_XOR,
                               POP_END);
        break;
#else
        /* we use the existing tables */
    case UNICODE_PROP_ID_Continue:
        ret = unicode_prop_ops(cr,
                               POP_PROP, UNICODE_PROP_ID_Start,
                               POP_PROP, UNICODE_PROP_ID_Continue1,
                               POP_XOR,
                               POP_END);
        break;
#endif
    default:
        if (prop_idx >= countof(unicode_prop_table))
            return -2;
        ret = unicode_prop1(cr, prop_idx);
        break;
    }
    return ret;
}

#endif /* CONFIG_ALL_UNICODE */

using JS_BOOL = int;

struct JSRuntime;
struct JSContext;
struct JSObject;
struct JSClass;
typedef uint32_t JSClassID;
typedef uint32_t JSAtom;

#if INTPTR_MAX >= INT64_MAX
#define JS_PTR64
#define JS_PTR64_DEF(a) a
#else
#define JS_PTR64_DEF(a)
#endif

#ifndef JS_PTR64
#define JS_NAN_BOXING
#endif

enum {
    /* all tags with a reference count are negative */
    JS_TAG_FIRST       = -11, /* first negative tag */
    JS_TAG_BIG_DECIMAL = -11,
    JS_TAG_BIG_INT     = -10,
    JS_TAG_BIG_FLOAT   = -9,
    JS_TAG_SYMBOL      = -8,
    JS_TAG_STRING      = -7,
    JS_TAG_MODULE      = -3, /* used internally */
    JS_TAG_FUNCTION_BYTECODE = -2, /* used internally */
    JS_TAG_OBJECT      = -1,

    JS_TAG_INT         = 0,
    JS_TAG_BOOL        = 1,
    JS_TAG_NULL        = 2,
    JS_TAG_UNDEFINED   = 3,
    JS_TAG_UNINITIALIZED = 4,
    JS_TAG_CATCH_OFFSET = 5,
    JS_TAG_EXCEPTION   = 6,
    JS_TAG_FLOAT64     = 7,
    /* any larger tag is FLOAT64 if JS_NAN_BOXING */
};

typedef struct JSRefCountHeader {
    int ref_count;
} JSRefCountHeader;

#define JS_FLOAT64_NAN NAN

#ifdef CONFIG_CHECK_JSVALUE
/* JSValue consistency : it is not possible to run the code in this
   mode, but it is useful to detect simple reference counting
   errors. It would be interesting to modify a static C analyzer to
   handle specific annotations (clang has such annotations but only
   for objective C) */
typedef struct __JSValue *JSValue;
typedef const struct __JSValue *JSValueConst;

#define JS_VALUE_GET_TAG(v) (int)((uintptr_t)(v) & 0xf)
/* same as JS_VALUE_GET_TAG, but return JS_TAG_FLOAT64 with NaN boxing */
#define JS_VALUE_GET_NORM_TAG(v) JS_VALUE_GET_TAG(v)
#define JS_VALUE_GET_INT(v) (int)((intptr_t)(v) >> 4)
#define JS_VALUE_GET_BOOL(v) JS_VALUE_GET_INT(v)
#define JS_VALUE_GET_FLOAT64(v) (double)JS_VALUE_GET_INT(v)
#define JS_VALUE_GET_PTR(v) (void *)((intptr_t)(v) & ~0xf)

#define JS_MKVAL(tag, val) (JSValue)(intptr_t)(((val) << 4) | (tag))
#define JS_MKPTR(tag, p) (JSValue)((intptr_t)(p) | (tag))

#define JS_TAG_IS_FLOAT64(tag) ((unsigned)(tag) == JS_TAG_FLOAT64)

#define JS_NAN JS_MKVAL(JS_TAG_FLOAT64, 1)

static inline JSValue __JS_NewFloat64(JSContext *ctx, double d)
{
    return JS_MKVAL(JS_TAG_FLOAT64, (int)d);
}

static inline JS_BOOL JS_VALUE_IS_NAN(JSValue v)
{
    return 0;
}

#elif defined(JS_NAN_BOXING)

using JSValue = uint64_t;
using JSValueConst = JSValue;

#define JS_VALUE_GET_TAG(v) (int)((v) >> 32)
#define JS_VALUE_GET_INT(v) (int)(v)
#define JS_VALUE_GET_BOOL(v) (int)(v)
#define JS_VALUE_GET_PTR(v) (void *)(intptr_t)(v)

#define JS_MKVAL(tag, val) (((uint64_t)(tag) << 32) | (uint32_t)(val))
#define JS_MKPTR(tag, ptr) (((uint64_t)(tag) << 32) | (uintptr_t)(ptr))

#define JS_FLOAT64_TAG_ADDEND (0x7ff80000 - JS_TAG_FIRST + 1) /* quiet NaN encoding */

static inline double JS_VALUE_GET_FLOAT64(JSValue v)
{
    union {
        JSValue v;
        double d;
    } u;
    u.v = v;
    u.v += (uint64_t)JS_FLOAT64_TAG_ADDEND << 32;
    return u.d;
}

#define JS_NAN (0x7ff8000000000000 - ((uint64_t)JS_FLOAT64_TAG_ADDEND << 32))

static inline JSValue __JS_NewFloat64(JSContext *ctx, double d)
{
    union {
        double d;
        uint64_t u64;
    } u;
    JSValue v;
    u.d = d;
    /* normalize NaN */
    if (js_unlikely((u.u64 & 0x7fffffffffffffff) > 0x7ff0000000000000))
        v = JS_NAN;
    else
        v = u.u64 - ((uint64_t)JS_FLOAT64_TAG_ADDEND << 32);
    return v;
}

#define JS_TAG_IS_FLOAT64(tag) ((unsigned)((tag) - JS_TAG_FIRST) >= (JS_TAG_FLOAT64 - JS_TAG_FIRST))

/* same as JS_VALUE_GET_TAG, but return JS_TAG_FLOAT64 with NaN boxing */
static inline int JS_VALUE_GET_NORM_TAG(JSValue v)
{
    uint32_t tag;
    tag = JS_VALUE_GET_TAG(v);
    if (JS_TAG_IS_FLOAT64(tag))
        return JS_TAG_FLOAT64;
    else
        return tag;
}

static inline JS_BOOL JS_VALUE_IS_NAN(JSValue v)
{
    uint32_t tag;
    tag = JS_VALUE_GET_TAG(v);
    return tag == (JS_NAN >> 32);
}

#else /* !JS_NAN_BOXING */

typedef union JSValueUnion {
    int32_t int32;
    double float64;
    void *ptr;
} JSValueUnion;

struct JSValue
{
    JSValue() = default;
    JSValue (int32_t v, int64_t t) { u.int32 = v; tag = t; }
    JSValue (double v, int64_t t)  { u.float64 = v; tag = t; }
    JSValue (void* v, int64_t t)   { u.ptr = v; tag = t; }
    JSValueUnion u;
    int64_t tag;
};

using JSValueConst = JSValue;

#define JS_VALUE_GET_TAG(v) ((int32_t)(v).tag)
/* same as JS_VALUE_GET_TAG, but return JS_TAG_FLOAT64 with NaN boxing */
#define JS_VALUE_GET_NORM_TAG(v) JS_VALUE_GET_TAG(v)
#define JS_VALUE_GET_INT(v) ((v).u.int32)
#define JS_VALUE_GET_BOOL(v) ((v).u.int32)
#define JS_VALUE_GET_FLOAT64(v) ((v).u.float64)
#define JS_VALUE_GET_PTR(v) ((v).u.ptr)

#define JS_MKVAL(tag, val) JSValue (static_cast<int32_t> (val), tag)
#define JS_MKPTR(tag, p)   JSValue (static_cast<void*> (p), tag)

#define JS_TAG_IS_FLOAT64(tag) ((unsigned)(tag) == JS_TAG_FLOAT64)

#define JS_NAN JSValue (JS_FLOAT64_NAN, JS_TAG_FLOAT64)

static inline JSValue __JS_NewFloat64(JSContext *ctx, double d)
{
    return JSValue (d, JS_TAG_FLOAT64);
}

static inline JS_BOOL JS_VALUE_IS_NAN(JSValue v)
{
    union {
        double d;
        uint64_t u64;
    } u;
    if (v.tag != JS_TAG_FLOAT64)
        return 0;
    u.d = v.u.float64;
    return (u.u64 & 0x7fffffffffffffff) > 0x7ff0000000000000;
}

#endif /* !JS_NAN_BOXING */

#define JS_VALUE_IS_BOTH_INT(v1, v2) ((JS_VALUE_GET_TAG(v1) | JS_VALUE_GET_TAG(v2)) == 0)
#define JS_VALUE_IS_BOTH_FLOAT(v1, v2) (JS_TAG_IS_FLOAT64(JS_VALUE_GET_TAG(v1)) && JS_TAG_IS_FLOAT64(JS_VALUE_GET_TAG(v2)))

#define JS_VALUE_GET_OBJ(v) ((JSObject *)JS_VALUE_GET_PTR(v))
#define JS_VALUE_GET_STRING(v) ((JSString *)JS_VALUE_GET_PTR(v))
#define JS_VALUE_HAS_REF_COUNT(v) ((unsigned)JS_VALUE_GET_TAG(v) >= (unsigned)JS_TAG_FIRST)

/* special values */
#define JS_NULL      JS_MKVAL(JS_TAG_NULL, 0)
#define JS_UNDEFINED JS_MKVAL(JS_TAG_UNDEFINED, 0)
#define JS_FALSE     JS_MKVAL(JS_TAG_BOOL, 0)
#define JS_TRUE      JS_MKVAL(JS_TAG_BOOL, 1)
#define JS_EXCEPTION JS_MKVAL(JS_TAG_EXCEPTION, 0)
#define JS_UNINITIALIZED JS_MKVAL(JS_TAG_UNINITIALIZED, 0)

/* flags for object properties */
#define JS_PROP_CONFIGURABLE  (1 << 0)
#define JS_PROP_WRITABLE      (1 << 1)
#define JS_PROP_ENUMERABLE    (1 << 2)
#define JS_PROP_C_W_E         (JS_PROP_CONFIGURABLE | JS_PROP_WRITABLE | JS_PROP_ENUMERABLE)
#define JS_PROP_LENGTH        (1 << 3) /* used internally in Arrays */
#define JS_PROP_TMASK         (3 << 4) /* mask for NORMAL, GETSET, VARREF, AUTOINIT */
#define JS_PROP_NORMAL         (0 << 4)
#define JS_PROP_GETSET         (1 << 4)
#define JS_PROP_VARREF         (2 << 4) /* used internally */
#define JS_PROP_AUTOINIT       (3 << 4) /* used internally */

/* flags for JS_DefineProperty */
#define JS_PROP_HAS_SHIFT        8
#define JS_PROP_HAS_CONFIGURABLE (1 << 8)
#define JS_PROP_HAS_WRITABLE     (1 << 9)
#define JS_PROP_HAS_ENUMERABLE   (1 << 10)
#define JS_PROP_HAS_GET          (1 << 11)
#define JS_PROP_HAS_SET          (1 << 12)
#define JS_PROP_HAS_VALUE        (1 << 13)

/* throw an exception if false would be returned
   (JS_DefineProperty/JS_SetProperty) */
#define JS_PROP_THROW            (1 << 14)
/* throw an exception if false would be returned in strict mode
   (JS_SetProperty) */
#define JS_PROP_THROW_STRICT     (1 << 15)

#define JS_PROP_NO_ADD           (1 << 16) /* internal use */
#define JS_PROP_NO_EXOTIC        (1 << 17) /* internal use */

#define JS_DEFAULT_STACK_SIZE (256 * 1024)

/* JS_Eval() flags */
#define JS_EVAL_TYPE_GLOBAL   (0 << 0) /* global code (default) */
#define JS_EVAL_TYPE_MODULE   (1 << 0) /* module code */
#define JS_EVAL_TYPE_DIRECT   (2 << 0) /* direct call (internal use) */
#define JS_EVAL_TYPE_INDIRECT (3 << 0) /* indirect call (internal use) */
#define JS_EVAL_TYPE_MASK     (3 << 0)

#define JS_EVAL_FLAG_STRICT   (1 << 3) /* force 'strict' mode */
#define JS_EVAL_FLAG_STRIP    (1 << 4) /* force 'strip' mode */
/* compile but do not run. The result is an object with a
   JS_TAG_FUNCTION_BYTECODE or JS_TAG_MODULE tag. It can be executed
   with JS_EvalFunction(). */
#define JS_EVAL_FLAG_COMPILE_ONLY (1 << 5)
/* don't include the stack frames before this eval in the Error() backtraces */
#define JS_EVAL_FLAG_BACKTRACE_BARRIER (1 << 6)

typedef JSValue JSCFunction(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv);
typedef JSValue JSCFunctionMagic(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv, int magic);
typedef JSValue JSCFunctionData(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv, int magic, JSValue *func_data);

typedef struct JSMallocState {
    size_t malloc_count;
    size_t malloc_size;
    size_t malloc_limit;
    void *opaque; /* user opaque */
} JSMallocState;

typedef struct JSMallocFunctions {
    void *(*js_malloc)(JSMallocState *s, size_t size);
    void (*js_free)(JSMallocState *s, void *ptr);
    void *(*js_realloc)(JSMallocState *s, void *ptr, size_t size);
    size_t (*js_malloc_usable_size)(const void *ptr);
} JSMallocFunctions;

typedef struct JSGCObjectHeader JSGCObjectHeader;

JSRuntime *JS_NewRuntime(void);
/* info lifetime must exceed that of rt */
void JS_SetRuntimeInfo(JSRuntime *rt, const char *info);
void JS_SetMemoryLimit(JSRuntime *rt, size_t limit);
void JS_SetGCThreshold(JSRuntime *rt, size_t gc_threshold);
/* use 0 to disable maximum stack size check */
void JS_SetMaxStackSize(JSRuntime *rt, size_t stack_size);
/* should be called when changing thread to update the stack top value
   used to check stack overflow. */
void JS_UpdateStackTop(JSRuntime *rt);
JSRuntime *JS_NewRuntime2(const JSMallocFunctions *mf, void *opaque);
void JS_FreeRuntime(JSRuntime *rt);
void *JS_GetRuntimeOpaque(JSRuntime *rt);
void JS_SetRuntimeOpaque(JSRuntime *rt, void *opaque);
typedef void JS_MarkFunc(JSRuntime *rt, JSGCObjectHeader *gp);
void JS_MarkValue(JSRuntime *rt, JSValueConst val, JS_MarkFunc *mark_func);
void JS_RunGC(JSRuntime *rt);
JS_BOOL JS_IsLiveObject(JSRuntime *rt, JSValueConst obj);

JSContext *JS_NewContext(JSRuntime *rt);
void JS_FreeContext(JSContext *s);
JSContext *JS_DupContext(JSContext *ctx);
void *JS_GetContextOpaque(JSContext *ctx);
void JS_SetContextOpaque(JSContext *ctx, void *opaque);
JSRuntime *JS_GetRuntime(JSContext *ctx);
void JS_SetClassProto(JSContext *ctx, JSClassID class_id, JSValue obj);
JSValue JS_GetClassProto(JSContext *ctx, JSClassID class_id);

/* the following functions are used to select the intrinsic object to
   save memory */
JSContext *JS_NewContextRaw(JSRuntime *rt);
void JS_AddIntrinsicBaseObjects(JSContext *ctx);
void JS_AddIntrinsicDate(JSContext *ctx);
void JS_AddIntrinsicEval(JSContext *ctx);
void JS_AddIntrinsicStringNormalize(JSContext *ctx);
void JS_AddIntrinsicRegExpCompiler(JSContext *ctx);
void JS_AddIntrinsicRegExp(JSContext *ctx);
void JS_AddIntrinsicJSON(JSContext *ctx);
void JS_AddIntrinsicProxy(JSContext *ctx);
void JS_AddIntrinsicMapSet(JSContext *ctx);
void JS_AddIntrinsicTypedArrays(JSContext *ctx);
void JS_AddIntrinsicPromise(JSContext *ctx);
void JS_AddIntrinsicBigInt(JSContext *ctx);
void JS_AddIntrinsicBigFloat(JSContext *ctx);
void JS_AddIntrinsicBigDecimal(JSContext *ctx);
/* enable operator overloading */
void JS_AddIntrinsicOperators(JSContext *ctx);
/* enable "use math" */
void JS_EnableBignumExt(JSContext *ctx, JS_BOOL enable);

JSValue js_string_codePointRange(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv);

void *js_malloc_rt(JSRuntime *rt, size_t size);
void js_free_rt(JSRuntime *rt, void *ptr);
void *js_realloc_rt(void *rt, void *ptr, size_t size);
size_t js_malloc_usable_size_rt(JSRuntime *rt, const void *ptr);
void *js_mallocz_rt(JSRuntime *rt, size_t size);

void *js_malloc(JSContext *ctx, size_t size);
void js_free(JSContext *ctx, void *ptr);
void *js_realloc(JSContext *ctx, void *ptr, size_t size);
size_t js_malloc_usable_size(JSContext *ctx, const void *ptr);
void *js_realloc2(JSContext *ctx, void *ptr, size_t size, size_t *pslack);
void *js_mallocz(JSContext *ctx, size_t size);
char *js_strdup(JSContext *ctx, const char *str);
char *js_strndup(JSContext *ctx, const char *s, size_t n);

typedef struct JSMemoryUsage {
    int64_t malloc_size, malloc_limit, memory_used_size;
    int64_t malloc_count;
    int64_t memory_used_count;
    int64_t atom_count, atom_size;
    int64_t str_count, str_size;
    int64_t obj_count, obj_size;
    int64_t prop_count, prop_size;
    int64_t shape_count, shape_size;
    int64_t js_func_count, js_func_size, js_func_code_size;
    int64_t js_func_pc2line_count, js_func_pc2line_size;
    int64_t c_func_count, array_count;
    int64_t fast_array_count, fast_array_elements;
    int64_t binary_object_count, binary_object_size;
} JSMemoryUsage;

void JS_ComputeMemoryUsage(JSRuntime *rt, JSMemoryUsage *s);
void JS_DumpMemoryUsage(FILE *fp, const JSMemoryUsage *s, JSRuntime *rt);

/* atom support */
static constexpr JSAtom JS_ATOM_NULL = 0;

JSAtom JS_NewAtomLen(JSContext *ctx, const char *str, size_t len);
JSAtom JS_NewAtom(JSContext *ctx, const char *str);
JSAtom JS_NewAtomUInt32(JSContext *ctx, uint32_t n);
JSAtom JS_DupAtom(JSContext *ctx, JSAtom v);
void JS_FreeAtom(JSContext *ctx, JSAtom v);
void JS_FreeAtomRT(JSRuntime *rt, JSAtom v);
JSValue JS_AtomToValue(JSContext *ctx, JSAtom atom);
JSValue JS_AtomToString(JSContext *ctx, JSAtom atom);
const char *JS_AtomToCString(JSContext *ctx, JSAtom atom);
JSAtom JS_ValueToAtom(JSContext *ctx, JSValueConst val);

/* object class support */

typedef struct JSPropertyEnum {
    JS_BOOL is_enumerable;
    JSAtom atom;
} JSPropertyEnum;

typedef struct JSPropertyDescriptor {
    int flags;
    JSValue value;
    JSValue getter;
    JSValue setter;
} JSPropertyDescriptor;

typedef struct JSClassExoticMethods {
    /* Return -1 if exception (can only happen in case of Proxy object),
       FALSE if the property does not exists, TRUE if it exists. If 1 is
       returned, the property descriptor 'desc' is filled if != NULL. */
    int (*get_own_property)(JSContext *ctx, JSPropertyDescriptor *desc,
                             JSValueConst obj, JSAtom prop);
    /* '*ptab' should hold the '*plen' property keys. Return 0 if OK,
       -1 if exception. The 'is_enumerable' field is ignored.
    */
    int (*get_own_property_names)(JSContext *ctx, JSPropertyEnum **ptab,
                                  uint32_t *plen,
                                  JSValueConst obj);
    /* return < 0 if exception, or TRUE/FALSE */
    int (*delete_property)(JSContext *ctx, JSValueConst obj, JSAtom prop);
    /* return < 0 if exception or TRUE/FALSE */
    int (*define_own_property)(JSContext *ctx, JSValueConst this_obj,
                               JSAtom prop, JSValueConst val,
                               JSValueConst getter, JSValueConst setter,
                               int flags);
    /* The following methods can be emulated with the previous ones,
       so they are usually not needed */
    /* return < 0 if exception or TRUE/FALSE */
    int (*has_property)(JSContext *ctx, JSValueConst obj, JSAtom atom);
    JSValue (*get_property)(JSContext *ctx, JSValueConst obj, JSAtom atom,
                            JSValueConst receiver);
    /* return < 0 if exception or TRUE/FALSE */
    int (*set_property)(JSContext *ctx, JSValueConst obj, JSAtom atom,
                        JSValueConst value, JSValueConst receiver, int flags);
} JSClassExoticMethods;

typedef void JSClassFinalizer(JSRuntime *rt, JSValue val);
typedef void JSClassGCMark(JSRuntime *rt, JSValueConst val,
                           JS_MarkFunc *mark_func);
enum
{
    JS_CALL_FLAG_CONSTRUCTOR = (1 << 0)
};

typedef JSValue JSClassCall(JSContext *ctx, JSValueConst func_obj,
                            JSValueConst this_val, int argc, JSValueConst *argv,
                            int flags);

typedef struct JSClassDef {
    const char *class_name;
    JSClassFinalizer *finalizer;
    JSClassGCMark *gc_mark;
    /* if call != NULL, the object is a function. If (flags &
       JS_CALL_FLAG_CONSTRUCTOR) != 0, the function is called as a
       constructor. In this case, 'this_val' is new.target. A
       constructor call only happens if the object constructor bit is
       set (see JS_SetConstructorBit()). */
    JSClassCall *call;
    /* XXX: suppress this indirection ? It is here only to save memory
       because only a few classes need these methods */
    JSClassExoticMethods *exotic;
} JSClassDef;

JSClassID JS_NewClassID(JSClassID *pclass_id);
int JS_NewClass(JSRuntime *rt, JSClassID class_id, const JSClassDef *class_def);
int JS_IsRegisteredClass(JSRuntime *rt, JSClassID class_id);

/* value handling */

static js_force_inline JSValue JS_NewBool(JSContext *ctx, JS_BOOL val)
{
    return JS_MKVAL(JS_TAG_BOOL, (val != 0));
}

static js_force_inline JSValue JS_NewInt32(JSContext *ctx, int32_t val)
{
    return JS_MKVAL(JS_TAG_INT, val);
}

static js_force_inline JSValue JS_NewCatchOffset(JSContext *ctx, int32_t val)
{
    return JS_MKVAL(JS_TAG_CATCH_OFFSET, val);
}

static js_force_inline JSValue JS_NewInt64(JSContext *ctx, int64_t val)
{
    JSValue v;
    if (val == (int32_t)val) {
        v = JS_NewInt32(ctx, val);
    } else {
        v = __JS_NewFloat64(ctx, val);
    }
    return v;
}

static js_force_inline JSValue JS_NewUint32(JSContext *ctx, uint32_t val)
{
    JSValue v;
    if (val <= 0x7fffffff) {
        v = JS_NewInt32(ctx, val);
    } else {
        v = __JS_NewFloat64(ctx, val);
    }
    return v;
}

JSValue JS_NewBigInt64(JSContext *ctx, int64_t v);
JSValue JS_NewBigUint64(JSContext *ctx, uint64_t v);

static js_force_inline JSValue JS_NewFloat64(JSContext *ctx, double d)
{
    JSValue v;
    int32_t val;
    union {
        double d;
        uint64_t u;
    } u, t;
    u.d = d;
    val = (int32_t)d;
    t.d = val;
    /* -0 cannot be represented as integer, so we compare the bit
        representation */
    if (u.u == t.u) {
        v = JS_MKVAL(JS_TAG_INT, val);
    } else {
        v = __JS_NewFloat64(ctx, d);
    }
    return v;
}

static inline JS_BOOL JS_IsNumber(JSValueConst v)
{
    int tag = JS_VALUE_GET_TAG(v);
    return tag == JS_TAG_INT || JS_TAG_IS_FLOAT64(tag);
}

static inline JS_BOOL JS_IsInteger(JSValueConst v)
{
    int tag = JS_VALUE_GET_TAG(v);
    return tag == JS_TAG_INT;
}

static inline JS_BOOL JS_IsBigInt(JSValueConst v)
{
    int tag = JS_VALUE_GET_TAG(v);
    return tag == JS_TAG_BIG_INT;
}

static inline JS_BOOL JS_IsBigFloat(JSValueConst v)
{
    int tag = JS_VALUE_GET_TAG(v);
    return tag == JS_TAG_BIG_FLOAT;
}

static inline JS_BOOL JS_IsBigDecimal(JSValueConst v)
{
    int tag = JS_VALUE_GET_TAG(v);
    return tag == JS_TAG_BIG_DECIMAL;
}

static inline JS_BOOL JS_IsBool(JSValueConst v)
{
    return JS_VALUE_GET_TAG(v) == JS_TAG_BOOL;
}

static inline JS_BOOL JS_IsNull(JSValueConst v)
{
    return JS_VALUE_GET_TAG(v) == JS_TAG_NULL;
}

static inline JS_BOOL JS_IsUndefined(JSValueConst v)
{
    return JS_VALUE_GET_TAG(v) == JS_TAG_UNDEFINED;
}

static inline JS_BOOL JS_IsException(JSValueConst v)
{
    return js_unlikely(JS_VALUE_GET_TAG(v) == JS_TAG_EXCEPTION);
}

static inline JS_BOOL JS_IsUninitialized(JSValueConst v)
{
    return js_unlikely(JS_VALUE_GET_TAG(v) == JS_TAG_UNINITIALIZED);
}

static inline JS_BOOL JS_IsString(JSValueConst v)
{
    return JS_VALUE_GET_TAG(v) == JS_TAG_STRING;
}

static inline JS_BOOL JS_IsSymbol(JSValueConst v)
{
    return JS_VALUE_GET_TAG(v) == JS_TAG_SYMBOL;
}

static inline JS_BOOL JS_IsObject(JSValueConst v)
{
    return JS_VALUE_GET_TAG(v) == JS_TAG_OBJECT;
}

JSValue JS_Throw(JSContext *ctx, JSValue obj);
JSValue JS_GetException(JSContext *ctx);
JS_BOOL JS_IsError(JSContext *ctx, JSValueConst val);
void JS_ResetUncatchableError(JSContext *ctx);
JSValue JS_NewError(JSContext *ctx);
JSValue JS_ThrowSyntaxError(JSContext *ctx, const char *fmt, ...);
JSValue JS_ThrowTypeError(JSContext *ctx, const char *fmt, ...);
JSValue JS_ThrowReferenceError(JSContext *ctx, const char *fmt, ...);
JSValue JS_ThrowRangeError(JSContext *ctx, const char *fmt, ...);
JSValue JS_ThrowInternalError(JSContext *ctx, const char *fmt, ...);
JSValue JS_ThrowOutOfMemory(JSContext *ctx);

void __JS_FreeValue(JSContext *ctx, JSValue v);
static inline void JS_FreeValue(JSContext *ctx, JSValue v)
{
    if (JS_VALUE_HAS_REF_COUNT(v)) {
        JSRefCountHeader *p = (JSRefCountHeader *)JS_VALUE_GET_PTR(v);
        if (--p->ref_count <= 0) {
            __JS_FreeValue(ctx, v);
        }
    }
}
void __JS_FreeValueRT(JSRuntime *rt, JSValue v);
static inline void JS_FreeValueRT(JSRuntime *rt, JSValue v)
{
    if (JS_VALUE_HAS_REF_COUNT(v)) {
        JSRefCountHeader *p = (JSRefCountHeader *)JS_VALUE_GET_PTR(v);
        if (--p->ref_count <= 0) {
            __JS_FreeValueRT(rt, v);
        }
    }
}

static inline JSValue JS_DupValue(JSContext *ctx, JSValueConst v)
{
    if (JS_VALUE_HAS_REF_COUNT(v)) {
        JSRefCountHeader *p = (JSRefCountHeader *)JS_VALUE_GET_PTR(v);
        p->ref_count++;
    }
    return (JSValue)v;
}

static inline JSValue JS_DupValueRT(JSRuntime *rt, JSValueConst v)
{
    if (JS_VALUE_HAS_REF_COUNT(v)) {
        JSRefCountHeader *p = (JSRefCountHeader *)JS_VALUE_GET_PTR(v);
        p->ref_count++;
    }
    return (JSValue)v;
}

int JS_ToBool(JSContext *ctx, JSValueConst val); /* return -1 for JS_EXCEPTION */
int JS_ToInt32(JSContext *ctx, int32_t *pres, JSValueConst val);
static inline int JS_ToUint32(JSContext *ctx, uint32_t *pres, JSValueConst val)
{
    return JS_ToInt32(ctx, (int32_t*)pres, val);
}
int JS_ToInt64(JSContext *ctx, int64_t *pres, JSValueConst val);
int JS_ToIndex(JSContext *ctx, uint64_t *plen, JSValueConst val);
int JS_ToFloat64(JSContext *ctx, double *pres, JSValueConst val);
/* return an exception if 'val' is a Number */
int JS_ToBigInt64(JSContext *ctx, int64_t *pres, JSValueConst val);
/* same as JS_ToInt64() but allow BigInt */
int JS_ToInt64Ext(JSContext *ctx, int64_t *pres, JSValueConst val);

JSValue JS_NewStringLen(JSContext *ctx, const char *str1, size_t len1);
JSValue JS_NewString(JSContext *ctx, const char *str);
JSValue JS_NewAtomString(JSContext *ctx, const char *str);
JSValue JS_ToString(JSContext *ctx, JSValueConst val);
JSValue JS_ToPropertyKey(JSContext *ctx, JSValueConst val);
const char *JS_ToCStringLen2(JSContext *ctx, size_t *plen, JSValueConst val1, JS_BOOL cesu8);
static inline const char *JS_ToCStringLen(JSContext *ctx, size_t *plen, JSValueConst val1)
{
    return JS_ToCStringLen2(ctx, plen, val1, 0);
}
static inline const char *JS_ToCString(JSContext *ctx, JSValueConst val1)
{
    return JS_ToCStringLen2(ctx, NULL, val1, 0);
}
void JS_FreeCString(JSContext *ctx, const char *ptr);

JSValue JS_NewObjectProtoClass(JSContext *ctx, JSValueConst proto, JSClassID class_id);
JSValue JS_NewObjectClass(JSContext *ctx, int class_id);
JSValue JS_NewObjectProto(JSContext *ctx, JSValueConst proto);
JSValue JS_NewObject(JSContext *ctx);

JS_BOOL JS_IsFunction(JSContext* ctx, JSValueConst val);
JS_BOOL JS_IsConstructor(JSContext* ctx, JSValueConst val);
JS_BOOL JS_SetConstructorBit(JSContext *ctx, JSValueConst func_obj, JS_BOOL val);

JSValue JS_NewArray(JSContext *ctx);
int JS_IsArray(JSContext *ctx, JSValueConst val);

JSValue JS_GetPropertyInternal(JSContext *ctx, JSValueConst obj,
                               JSAtom prop, JSValueConst receiver,
                               JS_BOOL throw_ref_error);
static js_force_inline JSValue JS_GetProperty(JSContext *ctx, JSValueConst this_obj,
                                              JSAtom prop)
{
    return JS_GetPropertyInternal(ctx, this_obj, prop, this_obj, 0);
}
JSValue JS_GetPropertyStr(JSContext *ctx, JSValueConst this_obj,
                          const char *prop);
JSValue JS_GetPropertyUint32(JSContext *ctx, JSValueConst this_obj,
                             uint32_t idx);

int JS_SetPropertyInternal(JSContext *ctx, JSValueConst this_obj,
                           JSAtom prop, JSValue val,
                           int flags);
static inline int JS_SetProperty(JSContext *ctx, JSValueConst this_obj,
                                 JSAtom prop, JSValue val)
{
    return JS_SetPropertyInternal(ctx, this_obj, prop, val, JS_PROP_THROW);
}
int JS_SetPropertyUint32(JSContext *ctx, JSValueConst this_obj,
                         uint32_t idx, JSValue val);
int JS_SetPropertyInt64(JSContext *ctx, JSValueConst this_obj,
                        int64_t idx, JSValue val);
int JS_SetPropertyStr(JSContext *ctx, JSValueConst this_obj,
                      const char *prop, JSValue val);
int JS_HasProperty(JSContext *ctx, JSValueConst this_obj, JSAtom prop);
int JS_IsExtensible(JSContext *ctx, JSValueConst obj);
int JS_PreventExtensions(JSContext *ctx, JSValueConst obj);
int JS_DeleteProperty(JSContext *ctx, JSValueConst obj, JSAtom prop, int flags);
int JS_SetPrototype(JSContext *ctx, JSValueConst obj, JSValueConst proto_val);
JSValue JS_GetPrototype(JSContext *ctx, JSValueConst val);

enum
{
    JS_GPN_STRING_MASK  = (1 << 0),
    JS_GPN_SYMBOL_MASK  = (1 << 1),
    JS_GPN_PRIVATE_MASK = (1 << 2),
    /* only include the enumerable properties */
    JS_GPN_ENUM_ONLY    = (1 << 4),
    /* set theJSPropertyEnum.is_enumerable field */
    JS_GPN_SET_ENUM     = (1 << 5)
};

int JS_GetOwnPropertyNames(JSContext *ctx, JSPropertyEnum **ptab,
                           uint32_t *plen, JSValueConst obj, int flags);
int JS_GetOwnProperty(JSContext *ctx, JSPropertyDescriptor *desc,
                      JSValueConst obj, JSAtom prop);

JSValue JS_Call(JSContext *ctx, JSValueConst func_obj, JSValueConst this_obj,
                int argc, JSValueConst *argv);
JSValue JS_Invoke(JSContext *ctx, JSValueConst this_val, JSAtom atom,
                  int argc, JSValueConst *argv);
JSValue JS_CallConstructor(JSContext *ctx, JSValueConst func_obj,
                           int argc, JSValueConst *argv);
JSValue JS_CallConstructor2(JSContext *ctx, JSValueConst func_obj,
                            JSValueConst new_target,
                            int argc, JSValueConst *argv);
JS_BOOL JS_DetectModule(const char *input, size_t input_len);
/* 'input' must be zero terminated i.e. input[input_len] = '\0'. */
JSValue JS_Eval(JSContext *ctx, const char *input, size_t input_len,
                const char *filename, int eval_flags);
/* same as JS_Eval() but with an explicit 'this_obj' parameter */
JSValue JS_EvalThis(JSContext *ctx, JSValueConst this_obj,
                    const char *input, size_t input_len,
                    const char *filename, int eval_flags);
JSValue JS_GetGlobalObject(JSContext *ctx);
int JS_IsInstanceOf(JSContext *ctx, JSValueConst val, JSValueConst obj);
int JS_DefineProperty(JSContext *ctx, JSValueConst this_obj,
                      JSAtom prop, JSValueConst val,
                      JSValueConst getter, JSValueConst setter, int flags);
int JS_DefinePropertyValue(JSContext *ctx, JSValueConst this_obj,
                           JSAtom prop, JSValue val, int flags);
int JS_DefinePropertyValueUint32(JSContext *ctx, JSValueConst this_obj,
                                 uint32_t idx, JSValue val, int flags);
int JS_DefinePropertyValueStr(JSContext *ctx, JSValueConst this_obj,
                              const char *prop, JSValue val, int flags);
int JS_DefinePropertyGetSet(JSContext *ctx, JSValueConst this_obj,
                            JSAtom prop, JSValue getter, JSValue setter,
                            int flags);
void JS_SetOpaque(JSValue obj, void *opaque);
void *JS_GetOpaque(JSValueConst obj, JSClassID class_id);
void *JS_GetOpaque2(JSContext *ctx, JSValueConst obj, JSClassID class_id);

/* 'buf' must be zero terminated i.e. buf[buf_len] = '\0'. */
JSValue JS_ParseJSON(JSContext *ctx, const char *buf, size_t buf_len,
                     const char *filename);
enum
{
    JS_PARSE_JSON_EXT = (1 << 0) /* allow extended JSON */
};

JSValue JS_ParseJSON2(JSContext *ctx, const char *buf, size_t buf_len,
                      const char *filename, int flags);
JSValue JS_JSONStringify(JSContext *ctx, JSValueConst obj,
                         JSValueConst replacer, JSValueConst space0);

typedef void JSFreeArrayBufferDataFunc(JSRuntime *rt, void *opaque, void *ptr);
JSValue JS_NewArrayBuffer(JSContext *ctx, uint8_t *buf, size_t len,
                          JSFreeArrayBufferDataFunc *free_func, void *opaque,
                          JS_BOOL is_shared);
JSValue JS_NewArrayBufferCopy(JSContext *ctx, const uint8_t *buf, size_t len);
void JS_DetachArrayBuffer(JSContext *ctx, JSValueConst obj);
uint8_t *JS_GetArrayBuffer(JSContext *ctx, size_t *psize, JSValueConst obj);
JSValue JS_GetTypedArrayBuffer(JSContext *ctx, JSValueConst obj,
                               size_t *pbyte_offset,
                               size_t *pbyte_length,
                               size_t *pbytes_per_element);
typedef struct {
    void *(*sab_alloc)(void *opaque, size_t size);
    void (*sab_free)(void *opaque, void *ptr);
    void (*sab_dup)(void *opaque, void *ptr);
    void *sab_opaque;
} JSSharedArrayBufferFunctions;
void JS_SetSharedArrayBufferFunctions(JSRuntime *rt,
                                      const JSSharedArrayBufferFunctions *sf);

JSValue JS_NewPromiseCapability(JSContext *ctx, JSValue *resolving_funcs);

/* is_handled = TRUE means that the rejection is handled */
typedef void JSHostPromiseRejectionTracker(JSContext *ctx, JSValueConst promise,
                                           JSValueConst reason,
                                           JS_BOOL is_handled, void *opaque);
void JS_SetHostPromiseRejectionTracker(JSRuntime *rt, JSHostPromiseRejectionTracker *cb, void *opaque);

/* return != 0 if the JS code needs to be interrupted */
typedef int JSInterruptHandler(JSRuntime *rt, void *opaque);
void JS_SetInterruptHandler(JSRuntime *rt, JSInterruptHandler *cb, void *opaque);
/* if can_block is TRUE, Atomics.wait() can be used */
void JS_SetCanBlock(JSRuntime *rt, JS_BOOL can_block);
/* set the [IsHTMLDDA] internal slot */
void JS_SetIsHTMLDDA(JSContext *ctx, JSValueConst obj);

typedef struct JSModuleDef JSModuleDef;

/* return the module specifier (allocated with js_malloc()) or NULL if
   exception */
typedef char *JSModuleNormalizeFunc(JSContext *ctx,
                                    const char *module_base_name,
                                    const char *module_name, void *opaque);
typedef JSModuleDef *JSModuleLoaderFunc(JSContext *ctx,
                                        const char *module_name, void *opaque);

/* module_normalize = NULL is allowed and invokes the default module
   filename normalizer */
void JS_SetModuleLoaderFunc(JSRuntime *rt,
                            JSModuleNormalizeFunc *module_normalize,
                            JSModuleLoaderFunc *module_loader, void *opaque);
/* return the import.meta object of a module */
JSValue JS_GetImportMeta(JSContext *ctx, JSModuleDef *m);
JSAtom JS_GetModuleName(JSContext *ctx, JSModuleDef *m);

/* JS Job support */

typedef JSValue JSJobFunc(JSContext *ctx, int argc, JSValueConst *argv);
int JS_EnqueueJob(JSContext *ctx, JSJobFunc *job_func, int argc, JSValueConst *argv);

JS_BOOL JS_IsJobPending(JSRuntime *rt);
int JS_ExecutePendingJob(JSRuntime *rt, JSContext **pctx);

/* Object Writer/Reader (currently only used to handle precompiled code) */
enum
{
    JS_WRITE_OBJ_BYTECODE  = (1 << 0), /* allow function/module */
    JS_WRITE_OBJ_BSWAP     = (1 << 1), /* byte swapped output */
    JS_WRITE_OBJ_SAB       = (1 << 2), /* allow SharedArrayBuffer */
    JS_WRITE_OBJ_REFERENCE = (1 << 3)  /* allow object references to encode arbitrary object graph */
};

uint8_t *JS_WriteObject(JSContext *ctx, size_t *psize, JSValueConst obj,
                        int flags);
uint8_t *JS_WriteObject2(JSContext *ctx, size_t *psize, JSValueConst obj,
                         int flags, uint8_t ***psab_tab, size_t *psab_tab_len);

enum
{
    JS_READ_OBJ_BYTECODE  = (1 << 0), /* allow function/module */
    JS_READ_OBJ_ROM_DATA  = (1 << 1), /* avoid duplicating 'buf' data */
    JS_READ_OBJ_SAB       = (1 << 2), /* allow SharedArrayBuffer */
    JS_READ_OBJ_REFERENCE = (1 << 3)  /* allow object references */
};

JSValue JS_ReadObject(JSContext *ctx, const uint8_t *buf, size_t buf_len,
                      int flags);
/* instantiate and evaluate a bytecode function. Only used when
   reading a script or module with JS_ReadObject() */
JSValue JS_EvalFunction(JSContext *ctx, JSValue fun_obj);
/* load the dependencies of the module 'obj'. Useful when JS_ReadObject()
   returns a module. */
int JS_ResolveModule(JSContext *ctx, JSValueConst obj);

/* only exported for os.Worker() */
JSAtom JS_GetScriptOrModuleName(JSContext *ctx, int n_stack_levels);
/* only exported for os.Worker() */
JSModuleDef *JS_RunModule(JSContext *ctx, const char *basename,
                          const char *filename);

/* C function definition */
typedef enum JSCFunctionEnum {  /* XXX: should rename for namespace isolation */
    JS_CFUNC_generic,
    JS_CFUNC_generic_magic,
    JS_CFUNC_constructor,
    JS_CFUNC_constructor_magic,
    JS_CFUNC_constructor_or_func,
    JS_CFUNC_constructor_or_func_magic,
    JS_CFUNC_f_f,
    JS_CFUNC_f_f_f,
    JS_CFUNC_getter,
    JS_CFUNC_setter,
    JS_CFUNC_getter_magic,
    JS_CFUNC_setter_magic,
    JS_CFUNC_iterator_next,
} JSCFunctionEnum;

typedef union JSCFunctionType {
    JSCFunction *generic;
    JSValue (*generic_magic)(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv, int magic);
    JSCFunction *constructor;
    JSValue (*constructor_magic)(JSContext *ctx, JSValueConst new_target, int argc, JSValueConst *argv, int magic);
    JSCFunction *constructor_or_func;
    double (*f_f)(double);
    double (*f_f_f)(double, double);
    JSValue (*getter)(JSContext *ctx, JSValueConst this_val);
    JSValue (*setter)(JSContext *ctx, JSValueConst this_val, JSValueConst val);
    JSValue (*getter_magic)(JSContext *ctx, JSValueConst this_val, int magic);
    JSValue (*setter_magic)(JSContext *ctx, JSValueConst this_val, JSValueConst val, int magic);
    JSValue (*iterator_next)(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv, int *pdone, int magic);
} JSCFunctionType;

JSValue JS_NewCFunction2(JSContext *ctx, JSCFunction *func,
                         const char *name,
                         int length, JSCFunctionEnum cproto, int magic);
JSValue JS_NewCFunctionData(JSContext *ctx, JSCFunctionData *func,
                            int length, int magic, int data_len,
                            JSValueConst *data);

static inline JSValue JS_NewCFunction(JSContext *ctx, JSCFunction *func, const char *name,
                                      int length)
{
    return JS_NewCFunction2(ctx, func, name, length, JS_CFUNC_generic, 0);
}

static inline JSValue JS_NewCFunctionMagic(JSContext *ctx, JSCFunctionMagic *func,
                                           const char *name,
                                           int length, JSCFunctionEnum cproto, int magic)
{
    return JS_NewCFunction2(ctx, (JSCFunction *)func, name, length, cproto, magic);
}
void JS_SetConstructor(JSContext *ctx, JSValueConst func_obj,
                       JSValueConst proto);

/* C property definition */

typedef struct JSCFunctionListEntry {
    const char *name;
    uint8_t prop_flags;
    uint8_t def_type;
    int16_t magic;
    union {
        struct {
            uint8_t length; /* XXX: should move outside union */
            uint8_t cproto; /* XXX: should move outside union */
            JSCFunctionType cfunc;
        } func;
        struct {
            JSCFunctionType get;
            JSCFunctionType set;
        } getset;
        struct {
            const char *name;
            int base;
        } alias;
        struct {
            const struct JSCFunctionListEntry *tab;
            int len;
        } prop_list;
        const char *str;
        int32_t i32;
        int64_t i64;
        double f64;
    } u;
} JSCFunctionListEntry;

enum
{
    JS_DEF_CFUNC          = 0,
    JS_DEF_CGETSET        = 1,
    JS_DEF_CGETSET_MAGIC  = 2,
    JS_DEF_PROP_STRING    = 3,
    JS_DEF_PROP_INT32     = 4,
    JS_DEF_PROP_INT64     = 5,
    JS_DEF_PROP_DOUBLE    = 6,
    JS_DEF_PROP_UNDEFINED = 7,
    JS_DEF_OBJECT         = 8,
    JS_DEF_ALIAS          = 9
};

/* Note: c++ does not like nested designators */
#define JS_CFUNC_DEF(name, length, func1)                   [] { JSCFunctionListEntry e { name, JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE, JS_DEF_CFUNC, 0     }; e.u.func = { length, JS_CFUNC_generic       }; e.u.func.cfunc.generic       = func1; return e; }()
#define JS_CFUNC_MAGIC_DEF(name, length, func1, magic)      [] { JSCFunctionListEntry e { name, JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE, JS_DEF_CFUNC, magic }; e.u.func = { length, JS_CFUNC_generic_magic }; e.u.func.cfunc.generic_magic = func1; return e; }()
#define JS_CFUNC_SPECIAL_DEF(name, length, cproto, func1)   [] { JSCFunctionListEntry e { name, JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE, JS_DEF_CFUNC, 0     }; e.u.func = { length, JS_CFUNC_ ## cproto    }; e.u.func.cfunc.cproto        = func1; return e; }()
#define JS_ITERATOR_NEXT_DEF(name, length, func1, magic)    [] { JSCFunctionListEntry e { name, JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE, JS_DEF_CFUNC, magic }; e.u.func = { length, JS_CFUNC_iterator_next }; e.u.func.cfunc.iterator_next = func1; return e; }()
#define JS_CGETSET_DEF(name, fgetter, fsetter)              [] { JSCFunctionListEntry e { name, JS_PROP_CONFIGURABLE, JS_DEF_CGETSET,       0     }; e.u.getset.get.getter       = fgetter; e.u.getset.set.setter       = fsetter; return e; }()
#define JS_CGETSET_MAGIC_DEF(name, fgetter, fsetter, magic) [] { JSCFunctionListEntry e { name, JS_PROP_CONFIGURABLE, JS_DEF_CGETSET_MAGIC, magic }; e.u.getset.get.getter_magic = fgetter; e.u.getset.set.setter_magic = fsetter; return e; }()
#define JS_PROP_STRING_DEF(name, cstr, prop_flags)          [] { JSCFunctionListEntry e { name, prop_flags, JS_DEF_PROP_STRING,    0 }; e.u.str = cstr; return e; }()
#define JS_PROP_INT32_DEF(name, val, prop_flags)            [] { JSCFunctionListEntry e { name, prop_flags, JS_DEF_PROP_INT32,     0 }; e.u.i32 = val;  return e; }()
#define JS_PROP_INT64_DEF(name, val, prop_flags)            [] { JSCFunctionListEntry e { name, prop_flags, JS_DEF_PROP_INT64,     0 }; e.u.i64 = val;  return e; }()
#define JS_PROP_DOUBLE_DEF(name, val, prop_flags)           [] { JSCFunctionListEntry e { name, prop_flags, JS_DEF_PROP_DOUBLE,    0 }; e.u.f64 = val;  return e; }()
#define JS_PROP_UNDEFINED_DEF(name, prop_flags)             [] { JSCFunctionListEntry e { name, prop_flags, JS_DEF_PROP_UNDEFINED, 0 }; e.u.i32 = 0;    return e; }()
#define JS_OBJECT_DEF(name, tab, len, prop_flags)           [] { JSCFunctionListEntry e { name, prop_flags, JS_DEF_OBJECT,         0 }; e.u.prop_list = { tab, len }; return e; }()
#define JS_ALIAS_DEF(name, from)                            [] { JSCFunctionListEntry e { name, JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE, JS_DEF_ALIAS, 0 }; e.u.alias = { from, -1 }; return e; }()
#define JS_ALIAS_BASE_DEF(name, from, base)                 [] { JSCFunctionListEntry e { name, JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE, JS_DEF_ALIAS, 0 }; e.u.alias = { from, base }; return e; }()

void JS_SetPropertyFunctionList(JSContext *ctx, JSValueConst obj,
                                const JSCFunctionListEntry *tab,
                                int len);

/* C module definition */

typedef int JSModuleInitFunc(JSContext *ctx, JSModuleDef *m);

JSModuleDef *JS_NewCModule(JSContext *ctx, const char *name_str,
                           JSModuleInitFunc *func);
/* can only be called before the module is instantiated */
int JS_AddModuleExport(JSContext *ctx, JSModuleDef *m, const char *name_str);
int JS_AddModuleExportList(JSContext *ctx, JSModuleDef *m,
                           const JSCFunctionListEntry *tab, int len);
/* can only be called after the module is instantiated */
int JS_SetModuleExport(JSContext *ctx, JSModuleDef *m, const char *export_name,
                       JSValue val);
int JS_SetModuleExportList(JSContext *ctx, JSModuleDef *m,
                           const JSCFunctionListEntry *tab, int len);


#ifdef CONFIG_BIGNUM
#include "libbf.h"
#endif

#define OPTIMIZE         1
#define SHORT_OPCODES    1
#if defined(EMSCRIPTEN) || ! defined(__clang__)
#define DIRECT_DISPATCH  0
#else
#define DIRECT_DISPATCH  1
#endif

#if defined(__APPLE__)
#define MALLOC_OVERHEAD  0
#else
#define MALLOC_OVERHEAD  8
#endif

#if !defined(_WIN32)
/* define it if printf uses the RNDN rounding mode instead of RNDNA */
#define CONFIG_PRINTF_RNDN
#endif

/* define to include Atomics.* operations which depend on the OS
   threads */
#if !defined(EMSCRIPTEN)
//#define CONFIG_ATOMICS
#endif

#if ! (defined(EMSCRIPTEN) || CHOC_QUICKJS_NO_STACK_CHECK || _MSC_VER)
 #define CONFIG_STACK_CHECK
#endif

// Avoid enabling the stack check if the sanitiser is active, as it causes all
// kinds of (hopefully) spurious exceptions
#if defined (__has_feature)
 #if __has_feature (address_sanitizer) && __has_feature (undefined_behavior_sanitizer)
  #undef CONFIG_STACK_CHECK
 #endif
#endif


/* dump object free */
//#define DUMP_FREE
//#define DUMP_CLOSURE
/* dump the bytecode of the compiled functions: combination of bits
   1: dump pass 3 final byte code
   2: dump pass 2 code
   4: dump pass 1 code
   8: dump stdlib functions
  16: dump bytecode in hex
  32: dump line number table
 */
//#define DUMP_BYTECODE  (1)
/* dump the occurence of the automatic GC */
//#define DUMP_GC
/* dump objects freed by the garbage collector */
//#define DUMP_GC_FREE
/* dump objects leaking when freeing the runtime */
//#define DUMP_LEAKS  1
/* dump memory usage before running the garbage collector */
//#define DUMP_MEM
//#define DUMP_OBJECTS    /* dump objects in JS_FreeContext */
//#define DUMP_ATOMS      /* dump atoms in JS_FreeContext */
//#define DUMP_SHAPES     /* dump shapes in JS_FreeContext */
//#define DUMP_MODULE_RESOLVE
//#define DUMP_PROMISE
//#define DUMP_READ_OBJECT

/* test the GC by forcing it before each object allocation */
//#define FORCE_GC_AT_MALLOC

enum {
    /* classid tag        */    /* union usage   | properties */
    JS_CLASS_OBJECT = 1,        /* must be first */
    JS_CLASS_ARRAY,             /* u.array       | length */
    JS_CLASS_ERROR,
    JS_CLASS_NUMBER,            /* u.object_data */
    JS_CLASS_STRING,            /* u.object_data */
    JS_CLASS_BOOLEAN,           /* u.object_data */
    JS_CLASS_SYMBOL,            /* u.object_data */
    JS_CLASS_ARGUMENTS,         /* u.array       | length */
    JS_CLASS_MAPPED_ARGUMENTS,  /*               | length */
    JS_CLASS_DATE,              /* u.object_data */
    JS_CLASS_MODULE_NS,
    JS_CLASS_C_FUNCTION,        /* u.cfunc */
    JS_CLASS_BYTECODE_FUNCTION, /* u.func */
    JS_CLASS_BOUND_FUNCTION,    /* u.bound_function */
    JS_CLASS_C_FUNCTION_DATA,   /* u.c_function_data_record */
    JS_CLASS_GENERATOR_FUNCTION, /* u.func */
    JS_CLASS_FOR_IN_ITERATOR,   /* u.for_in_iterator */
    JS_CLASS_REGEXP,            /* u.regexp */
    JS_CLASS_ARRAY_BUFFER,      /* u.array_buffer */
    JS_CLASS_SHARED_ARRAY_BUFFER, /* u.array_buffer */
    JS_CLASS_UINT8C_ARRAY,      /* u.array (typed_array) */
    JS_CLASS_INT8_ARRAY,        /* u.array (typed_array) */
    JS_CLASS_UINT8_ARRAY,       /* u.array (typed_array) */
    JS_CLASS_INT16_ARRAY,       /* u.array (typed_array) */
    JS_CLASS_UINT16_ARRAY,      /* u.array (typed_array) */
    JS_CLASS_INT32_ARRAY,       /* u.array (typed_array) */
    JS_CLASS_UINT32_ARRAY,      /* u.array (typed_array) */
#ifdef CONFIG_BIGNUM
    JS_CLASS_BIG_INT64_ARRAY,   /* u.array (typed_array) */
    JS_CLASS_BIG_UINT64_ARRAY,  /* u.array (typed_array) */
#endif
    JS_CLASS_FLOAT32_ARRAY,     /* u.array (typed_array) */
    JS_CLASS_FLOAT64_ARRAY,     /* u.array (typed_array) */
    JS_CLASS_DATAVIEW,          /* u.typed_array */
#ifdef CONFIG_BIGNUM
    JS_CLASS_BIG_INT,           /* u.object_data */
    JS_CLASS_BIG_FLOAT,         /* u.object_data */
    JS_CLASS_FLOAT_ENV,         /* u.float_env */
    JS_CLASS_BIG_DECIMAL,       /* u.object_data */
    JS_CLASS_OPERATOR_SET,      /* u.operator_set */
#endif
    JS_CLASS_MAP,               /* u.map_state */
    JS_CLASS_SET,               /* u.map_state */
    JS_CLASS_WEAKMAP,           /* u.map_state */
    JS_CLASS_WEAKSET,           /* u.map_state */
    JS_CLASS_MAP_ITERATOR,      /* u.map_iterator_data */
    JS_CLASS_SET_ITERATOR,      /* u.map_iterator_data */
    JS_CLASS_ARRAY_ITERATOR,    /* u.array_iterator_data */
    JS_CLASS_STRING_ITERATOR,   /* u.array_iterator_data */
    JS_CLASS_REGEXP_STRING_ITERATOR,   /* u.regexp_string_iterator_data */
    JS_CLASS_GENERATOR,         /* u.generator_data */
    JS_CLASS_PROXY,             /* u.proxy_data */
    JS_CLASS_PROMISE,           /* u.promise_data */
    JS_CLASS_PROMISE_RESOLVE_FUNCTION,  /* u.promise_function_data */
    JS_CLASS_PROMISE_REJECT_FUNCTION,   /* u.promise_function_data */
    JS_CLASS_ASYNC_FUNCTION,            /* u.func */
    JS_CLASS_ASYNC_FUNCTION_RESOLVE,    /* u.async_function_data */
    JS_CLASS_ASYNC_FUNCTION_REJECT,     /* u.async_function_data */
    JS_CLASS_ASYNC_FROM_SYNC_ITERATOR,  /* u.async_from_sync_iterator_data */
    JS_CLASS_ASYNC_GENERATOR_FUNCTION,  /* u.func */
    JS_CLASS_ASYNC_GENERATOR,   /* u.async_generator_data */

    JS_CLASS_INIT_COUNT, /* last entry for predefined classes */
};

/* number of typed array types */
#define JS_TYPED_ARRAY_COUNT  (JS_CLASS_FLOAT64_ARRAY - JS_CLASS_UINT8C_ARRAY + 1)
extern uint8_t const typed_array_size_log2[JS_TYPED_ARRAY_COUNT];
#define typed_array_size_log2(classid)  (typed_array_size_log2[(classid)- JS_CLASS_UINT8C_ARRAY])

typedef enum JSErrorEnum {
    JS_EVAL_ERROR,
    JS_RANGE_ERROR,
    JS_REFERENCE_ERROR,
    JS_SYNTAX_ERROR,
    JS_TYPE_ERROR,
    JS_URI_ERROR,
    JS_INTERNAL_ERROR,
    JS_AGGREGATE_ERROR,

    JS_NATIVE_ERROR_COUNT, /* number of different NativeError objects */
} JSErrorEnum;

#define JS_MAX_LOCAL_VARS 65536
#define JS_STACK_SIZE_MAX 65534
#define JS_STRING_LEN_MAX ((1 << 30) - 1)

typedef struct JSShape JSShape;
typedef struct JSString JSString;
typedef struct JSString JSAtomStruct;

typedef enum {
    JS_GC_PHASE_NONE,
    JS_GC_PHASE_DECREF,
    JS_GC_PHASE_REMOVE_CYCLES,
} JSGCPhaseEnum;

#define QUICKJS_OPCODES(F, D1, D2) \
    F(none) \
    F(none_int) \
    F(none_loc) \
    F(none_arg) \
    F(none_var_ref) \
    F(u8) \
    F(i8) \
    F(loc8) \
    F(const8) \
    F(label8) \
    F(u16) \
    F(i16) \
    F(label16) \
    F(npop) \
    F(npopx) \
    F(npop_u16) \
    F(loc) \
    F(arg) \
    F(var_ref) \
    F(u32) \
    F(i32) \
    F(const) \
    F(label) \
    F(atom) \
    F(atom_u8) \
    F(atom_u16) \
    F(atom_label_u8) \
    F(atom_label_u16) \
    F(label_u16) \
\
    D1(invalid, 1, 0, 0, none) /* never emitted */\
    /* push values */ \
    D1(       push_i32, 5, 0, 1, i32)\
    D1(     push_const, 5, 0, 1, const)\
    D1(       fclosure, 5, 0, 1, const) /* must follow push_const */\
    D1(push_atom_value, 5, 0, 1, atom)\
    D1( private_symbol, 5, 0, 1, atom)\
    D1(      undefined, 1, 0, 1, none)\
    D1(           null, 1, 0, 1, none)\
    D1(      push_this, 1, 0, 1, none) /* only used at the start of a function */\
    D1(     push_false, 1, 0, 1, none)\
    D1(      push_true, 1, 0, 1, none)\
    D1(         object, 1, 0, 1, none)\
    D1( special_object, 2, 0, 1, u8) /* only used at the start of a function */\
    D1(           rest, 3, 0, 1, u16) /* only used at the start of a function */\
\
    D1(           drop, 1, 1, 0, none) /* a -> */  \
    D1(            nip, 1, 2, 1, none) /* a b -> b */  \
    D1(           nip1, 1, 3, 2, none) /* a b c -> b c */  \
    D1(            dup, 1, 1, 2, none) /* a -> a a */  \
    D1(           dup1, 1, 2, 3, none) /* a b -> a a b */  \
    D1(           dup2, 1, 2, 4, none) /* a b -> a b a b */  \
    D1(           dup3, 1, 3, 6, none) /* a b c -> a b c a b c */  \
    D1(        insert2, 1, 2, 3, none) /* obj a -> a obj a (dup_x1) */  \
    D1(        insert3, 1, 3, 4, none) /* obj prop a -> a obj prop a (dup_x2) */  \
    D1(        insert4, 1, 4, 5, none) /* this obj prop a -> a this obj prop a */  \
    D1(          perm3, 1, 3, 3, none) /* obj a b -> a obj b */  \
    D1(          perm4, 1, 4, 4, none) /* obj prop a b -> a obj prop b */  \
    D1(          perm5, 1, 5, 5, none) /* this obj prop a b -> a this obj prop b */  \
    D1(           swap, 1, 2, 2, none) /* a b -> b a */  \
    D1(          swap2, 1, 4, 4, none) /* a b c d -> c d a b */  \
    D1(          rot3l, 1, 3, 3, none) /* x a b -> a b x */  \
    D1(          rot3r, 1, 3, 3, none) /* a b x -> x a b */  \
    D1(          rot4l, 1, 4, 4, none) /* x a b c -> a b c x */  \
    D1(          rot5l, 1, 5, 5, none) /* x a b c d -> a b c d x */  \
\
    D1(call_constructor, 3, 2, 1, npop) /* func new.target args -> ret. arguments are not counted in n_pop */ \
    D1(           call, 3, 1, 1, npop) /* arguments are not counted in n_pop */ \
    D1(      tail_call, 3, 1, 0, npop) /* arguments are not counted in n_pop */ \
    D1(    call_method, 3, 2, 1, npop) /* arguments are not counted in n_pop */ \
    D1(tail_call_method, 3, 2, 0, npop) /* arguments are not counted in n_pop */ \
    D1(     array_from, 3, 0, 1, npop) /* arguments are not counted in n_pop */ \
    D1(          apply, 3, 3, 1, u16) \
    D1(         return, 1, 1, 0, none) \
    D1(   return_undef, 1, 0, 0, none) \
    D1(check_ctor_return, 1, 1, 2, none) \
    D1(     check_ctor, 1, 0, 0, none) \
    D1(    check_brand, 1, 2, 2, none) /* this_obj func -> this_obj func */ \
    D1(      add_brand, 1, 2, 0, none) /* this_obj home_obj -> */ \
    D1(   return_async, 1, 1, 0, none) \
    D1(          throw, 1, 1, 0, none) \
    D1(    throw_error, 6, 0, 0, atom_u8) \
    D1(           eval, 5, 1, 1, npop_u16) /* func args... -> ret_val */ \
    D1(     apply_eval, 3, 2, 1, u16) /* func array -> ret_eval */ \
    D1(         regexp, 1, 2, 1, none) /* create a RegExp object from the pattern and a bytecode string */ \
    D1(      get_super, 1, 1, 1, none) \
    D1(         import, 1, 1, 1, none) /* dynamic module import */ \
\
    D1(      check_var, 5, 0, 1, atom) /* check if a variable exists */ \
    D1(  get_var_undef, 5, 0, 1, atom) /* push undefined if the variable does not exist */ \
    D1(        get_var, 5, 0, 1, atom) /* throw an exception if the variable does not exist */ \
    D1(        put_var, 5, 1, 0, atom) /* must come after get_var */ \
    D1(   put_var_init, 5, 1, 0, atom) /* must come after put_var. Used to initialize a global lexical variable */ \
    D1( put_var_strict, 5, 2, 0, atom) /* for strict mode variable write */ \
\
    D1(  get_ref_value, 1, 2, 3, none) \
    D1(  put_ref_value, 1, 3, 0, none) \
\
    D1(     define_var, 6, 0, 0, atom_u8) \
    D1(check_define_var, 6, 0, 0, atom_u8) \
    D1(    define_func, 6, 1, 0, atom_u8) \
    D1(      get_field, 5, 1, 1, atom) \
    D1(     get_field2, 5, 1, 2, atom) \
    D1(      put_field, 5, 2, 0, atom) \
    D1( get_private_field, 1, 2, 1, none) /* obj prop -> value */ \
    D1( put_private_field, 1, 3, 0, none) /* obj value prop -> */ \
    D1(define_private_field, 1, 3, 1, none) /* obj prop value -> obj */ \
    D1(   get_array_el, 1, 2, 1, none) \
    D1(  get_array_el2, 1, 2, 2, none) /* obj prop -> obj value */ \
    D1(   put_array_el, 1, 3, 0, none) \
    D1(get_super_value, 1, 3, 1, none) /* this obj prop -> value */ \
    D1(put_super_value, 1, 4, 0, none) /* this obj prop value -> */ \
    D1(   define_field, 5, 2, 1, atom) \
    D1(       set_name, 5, 1, 1, atom) \
    D1(set_name_computed, 1, 2, 2, none) \
    D1(      set_proto, 1, 2, 1, none) \
    D1(set_home_object, 1, 2, 2, none) \
    D1(define_array_el, 1, 3, 2, none) \
    D1(         append, 1, 3, 2, none) /* append enumerated object, update length */ \
    D1(copy_data_properties, 2, 3, 3, u8) \
    D1(  define_method, 6, 2, 1, atom_u8) \
    D1(define_method_computed, 2, 3, 1, u8) /* must come after define_method */ \
    D1(   define_class, 6, 2, 2, atom_u8) /* parent ctor -> ctor proto */ \
    D1(   define_class_computed, 6, 3, 3, atom_u8) /* field_name parent ctor -> field_name ctor proto (class with computed name) */ \
\
    D1(        get_loc, 3, 0, 1, loc) \
    D1(        put_loc, 3, 1, 0, loc) /* must come after get_loc */ \
    D1(        set_loc, 3, 1, 1, loc) /* must come after put_loc */ \
    D1(        get_arg, 3, 0, 1, arg) \
    D1(        put_arg, 3, 1, 0, arg) /* must come after get_arg */ \
    D1(        set_arg, 3, 1, 1, arg) /* must come after put_arg */ \
    D1(    get_var_ref, 3, 0, 1, var_ref) \
    D1(    put_var_ref, 3, 1, 0, var_ref) /* must come after get_var_ref */ \
    D1(    set_var_ref, 3, 1, 1, var_ref) /* must come after put_var_ref */ \
    D1(set_loc_uninitialized, 3, 0, 0, loc) \
    D1(  get_loc_check, 3, 0, 1, loc) \
    D1(  put_loc_check, 3, 1, 0, loc) /* must come after get_loc_check */ \
    D1(  put_loc_check_init, 3, 1, 0, loc) \
    D1(get_var_ref_check, 3, 0, 1, var_ref) \
    D1(put_var_ref_check, 3, 1, 0, var_ref) /* must come after get_var_ref_check */ \
    D1(put_var_ref_check_init, 3, 1, 0, var_ref) \
    D1(      close_loc, 3, 0, 0, loc) \
    D1(       if_false, 5, 1, 0, label) \
    D1(        if_true, 5, 1, 0, label) /* must come after if_false */ \
    D1(           goto, 5, 0, 0, label) /* must come after if_true */ \
    D1(          catch, 5, 0, 1, label) \
    D1(          gosub, 5, 0, 0, label) /* used to execute the finally block */ \
    D1(            ret, 1, 1, 0, none) /* used to return from the finally block */ \
\
    D1(      to_object, 1, 1, 1, none) \
    D1(     to_propkey, 1, 1, 1, none) \
    D1(    to_propkey2, 1, 2, 2, none) \
\
    D1(   with_get_var, 10, 1, 0, atom_label_u8)     /* must be in the same order as scope_xxx */ \
    D1(   with_put_var, 10, 2, 1, atom_label_u8)     /* must be in the same order as scope_xxx */ \
    D1(with_delete_var, 10, 1, 0, atom_label_u8)     /* must be in the same order as scope_xxx */ \
    D1(  with_make_ref, 10, 1, 0, atom_label_u8)     /* must be in the same order as scope_xxx */ \
    D1(   with_get_ref, 10, 1, 0, atom_label_u8)     /* must be in the same order as scope_xxx */ \
    D1(with_get_ref_undef, 10, 1, 0, atom_label_u8) \
\
    D1(   make_loc_ref, 7, 0, 2, atom_u16) \
    D1(   make_arg_ref, 7, 0, 2, atom_u16) \
    D1(make_var_ref_ref, 7, 0, 2, atom_u16) \
    D1(   make_var_ref, 5, 0, 2, atom) \
\
    D1(   for_in_start, 1, 1, 1, none) \
    D1(   for_of_start, 1, 1, 3, none) \
    D1(for_await_of_start, 1, 1, 3, none) \
    D1(    for_in_next, 1, 1, 3, none) \
    D1(    for_of_next, 2, 3, 5, u8) \
    D1(iterator_check_object, 1, 1, 1, none) \
    D1(iterator_get_value_done, 1, 1, 2, none) \
    D1( iterator_close, 1, 3, 0, none) \
    D1(iterator_close_return, 1, 4, 4, none) \
    D1(  iterator_next, 1, 4, 4, none) \
    D1(  iterator_call, 2, 4, 5, u8) \
    D1(  initial_yield, 1, 0, 0, none) \
    D1(          yield, 1, 1, 2, none) \
    D1(     yield_star, 1, 1, 2, none) \
    D1(async_yield_star, 1, 1, 2, none) \
    D1(          await, 1, 1, 1, none) \
\
    /* arithmetic/logic operations */ \
    D1(            neg, 1, 1, 1, none) \
    D1(           plus, 1, 1, 1, none) \
    D1(            dec, 1, 1, 1, none) \
    D1(            inc, 1, 1, 1, none) \
    D1(       post_dec, 1, 1, 2, none) \
    D1(       post_inc, 1, 1, 2, none) \
    D1(        dec_loc, 2, 0, 0, loc8) \
    D1(        inc_loc, 2, 0, 0, loc8) \
    D1(        add_loc, 2, 1, 0, loc8) \
    D1(            not, 1, 1, 1, none) \
    D1(           lnot, 1, 1, 1, none) \
    D1(         typeof, 1, 1, 1, none) \
    D1(         delete, 1, 2, 1, none) \
    D1(     delete_var, 5, 0, 1, atom) \
\
    D1(            mul, 1, 2, 1, none) \
    D1(            div, 1, 2, 1, none) \
    D1(            mod, 1, 2, 1, none) \
    D1(            add, 1, 2, 1, none) \
    D1(            sub, 1, 2, 1, none) \
    D1(            pow, 1, 2, 1, none) \
    D1(            shl, 1, 2, 1, none) \
    D1(            sar, 1, 2, 1, none) \
    D1(            shr, 1, 2, 1, none) \
    D1(             lt, 1, 2, 1, none) \
    D1(            lte, 1, 2, 1, none) \
    D1(             gt, 1, 2, 1, none) \
    D1(            gte, 1, 2, 1, none) \
    D1(     instanceof, 1, 2, 1, none) \
    D1(             in, 1, 2, 1, none) \
    D1(             eq, 1, 2, 1, none) \
    D1(            neq, 1, 2, 1, none) \
    D1(      strict_eq, 1, 2, 1, none) \
    D1(     strict_neq, 1, 2, 1, none) \
    D1(            and, 1, 2, 1, none) \
    D1(            xor, 1, 2, 1, none) \
    D1(             or, 1, 2, 1, none) \
    D1(is_undefined_or_null, 1, 1, 1, none) \
    /* must be the last non short and non temporary opcode */ \
    D1(            nop, 1, 0, 0, none) \
\
    /* temporary opcodes: never emitted in the final bytecode */ \
\
    D2(    enter_scope, 3, 0, 0, u16)  /* emitted in phase 1, removed in phase 2 */\
    D2(    leave_scope, 3, 0, 0, u16)  /* emitted in phase 1, removed in phase 2 */\
\
    D2(          label, 5, 0, 0, label) /* emitted in phase 1, removed in phase 3 */\
\
    D2(scope_get_var_undef, 7, 0, 1, atom_u16) /* emitted in phase 1, removed in phase 2 */ \
    D2(  scope_get_var, 7, 0, 1, atom_u16) /* emitted in phase 1, removed in phase 2 */ \
    D2(  scope_put_var, 7, 1, 0, atom_u16) /* emitted in phase 1, removed in phase 2 */ \
    D2(scope_delete_var, 7, 0, 1, atom_u16) /* emitted in phase 1, removed in phase 2 */ \
    D2( scope_make_ref, 11, 0, 2, atom_label_u16) /* emitted in phase 1, removed in phase 2 */ \
    D2(  scope_get_ref, 7, 0, 2, atom_u16) /* emitted in phase 1, removed in phase 2 */ \
    D2(scope_put_var_init, 7, 0, 2, atom_u16) /* emitted in phase 1, removed in phase 2 */ \
    D2(scope_get_private_field, 7, 1, 1, atom_u16) /* obj -> value, emitted in phase 1, removed in phase 2 */ \
    D2(scope_get_private_field2, 7, 1, 2, atom_u16) /* obj -> obj value, emitted in phase 1, removed in phase 2 */ \
    D2(scope_put_private_field, 7, 1, 1, atom_u16) /* obj value ->, emitted in phase 1, removed in phase 2 */ \
\
    D2( set_class_name, 5, 1, 1, u32) /* emitted in phase 1, removed in phase 2 */ \
\
    D2(       line_num, 5, 0, 0, u32) /* emitted in phase 1, removed in phase 3 */ \
\
    D1(    push_minus1, 1, 0, 1, none_int) \
    D1(         push_0, 1, 0, 1, none_int) \
    D1(         push_1, 1, 0, 1, none_int) \
    D1(         push_2, 1, 0, 1, none_int) \
    D1(         push_3, 1, 0, 1, none_int) \
    D1(         push_4, 1, 0, 1, none_int) \
    D1(         push_5, 1, 0, 1, none_int) \
    D1(         push_6, 1, 0, 1, none_int) \
    D1(         push_7, 1, 0, 1, none_int) \
    D1(        push_i8, 2, 0, 1, i8) \
    D1(       push_i16, 3, 0, 1, i16) \
    D1(    push_const8, 2, 0, 1, const8) \
    D1(      fclosure8, 2, 0, 1, const8) /* must follow push_const8 */ \
    D1(push_empty_string, 1, 0, 1, none) \
\
    D1(       get_loc8, 2, 0, 1, loc8) \
    D1(       put_loc8, 2, 1, 0, loc8) \
    D1(       set_loc8, 2, 1, 1, loc8) \
\
    D1(       get_loc0, 1, 0, 1, none_loc) \
    D1(       get_loc1, 1, 0, 1, none_loc) \
    D1(       get_loc2, 1, 0, 1, none_loc) \
    D1(       get_loc3, 1, 0, 1, none_loc) \
    D1(       put_loc0, 1, 1, 0, none_loc) \
    D1(       put_loc1, 1, 1, 0, none_loc) \
    D1(       put_loc2, 1, 1, 0, none_loc) \
    D1(       put_loc3, 1, 1, 0, none_loc) \
    D1(       set_loc0, 1, 1, 1, none_loc) \
    D1(       set_loc1, 1, 1, 1, none_loc) \
    D1(       set_loc2, 1, 1, 1, none_loc) \
    D1(       set_loc3, 1, 1, 1, none_loc) \
    D1(       get_arg0, 1, 0, 1, none_arg) \
    D1(       get_arg1, 1, 0, 1, none_arg) \
    D1(       get_arg2, 1, 0, 1, none_arg) \
    D1(       get_arg3, 1, 0, 1, none_arg) \
    D1(       put_arg0, 1, 1, 0, none_arg) \
    D1(       put_arg1, 1, 1, 0, none_arg) \
    D1(       put_arg2, 1, 1, 0, none_arg) \
    D1(       put_arg3, 1, 1, 0, none_arg) \
    D1(       set_arg0, 1, 1, 1, none_arg) \
    D1(       set_arg1, 1, 1, 1, none_arg) \
    D1(       set_arg2, 1, 1, 1, none_arg) \
    D1(       set_arg3, 1, 1, 1, none_arg) \
    D1(   get_var_ref0, 1, 0, 1, none_var_ref) \
    D1(   get_var_ref1, 1, 0, 1, none_var_ref) \
    D1(   get_var_ref2, 1, 0, 1, none_var_ref) \
    D1(   get_var_ref3, 1, 0, 1, none_var_ref) \
    D1(   put_var_ref0, 1, 1, 0, none_var_ref) \
    D1(   put_var_ref1, 1, 1, 0, none_var_ref) \
    D1(   put_var_ref2, 1, 1, 0, none_var_ref) \
    D1(   put_var_ref3, 1, 1, 0, none_var_ref) \
    D1(   set_var_ref0, 1, 1, 1, none_var_ref) \
    D1(   set_var_ref1, 1, 1, 1, none_var_ref) \
    D1(   set_var_ref2, 1, 1, 1, none_var_ref) \
    D1(   set_var_ref3, 1, 1, 1, none_var_ref) \
\
    D1(     get_length, 1, 1, 1, none) \
\
    D1(      if_false8, 2, 1, 0, label8) \
    D1(       if_true8, 2, 1, 0, label8) /* must come after if_false8 */ \
    D1(          goto8, 2, 0, 0, label8) /* must come after if_true8 */ \
    D1(         goto16, 3, 0, 0, label16) \
\
    D1(          call0, 1, 1, 1, npopx) \
    D1(          call1, 1, 1, 1, npopx) \
    D1(          call2, 1, 1, 1, npopx) \
    D1(          call3, 1, 1, 1, npopx) \
\
    D1(   is_undefined, 1, 1, 1, none) \
    D1(        is_null, 1, 1, 1, none) \
    D1(typeof_is_undefined, 1, 1, 1, none) \
    D1( typeof_is_function, 1, 1, 1, none) \


enum OPCodeEnum {
#define FMT(f)
#define DEF(id, size, n_pop, n_push, f) OP_ ## id,
#define def(id, size, n_pop, n_push, f)
QUICKJS_OPCODES(FMT, DEF, def)
#undef def
#undef DEF
#undef FMT
    OP_COUNT, /* excluding temporary opcodes */
    /* temporary opcodes : overlap with the short opcodes */
    OP_TEMP_START = OP_nop + 1,
    OP___dummy = OP_TEMP_START - 1,
#define FMT(f)
#define DEF(id, size, n_pop, n_push, f)
#define def(id, size, n_pop, n_push, f) OP_ ## id,
QUICKJS_OPCODES(FMT, DEF, def)
#undef def
#undef DEF
#undef FMT
    OP_TEMP_END,
};


#ifdef CONFIG_BIGNUM
/* function pointers are used for numeric operations so that it is
   possible to remove some numeric types */
typedef struct {
    JSValue (*to_string)(JSContext *ctx, JSValueConst val);
    JSValue (*from_string)(JSContext *ctx, const char *buf,
                           int radix, int flags, slimb_t *pexponent);
    int (*unary_arith)(JSContext *ctx,
                       JSValue *pres, OPCodeEnum op, JSValue op1);
    int (*binary_arith)(JSContext *ctx, OPCodeEnum op,
                        JSValue *pres, JSValue op1, JSValue op2);
    int (*compare)(JSContext *ctx, OPCodeEnum op,
                   JSValue op1, JSValue op2);
    /* only for bigfloat: */
    JSValue (*mul_pow10_to_float64)(JSContext *ctx, const bf_t *a,
                                    int64_t exponent);
    int (*mul_pow10)(JSContext *ctx, JSValue *sp);
} JSNumericOperations;
#endif

struct JSRuntime {
    JSMallocFunctions mf;
    JSMallocState malloc_state;
    const char *rt_info;

    int atom_hash_size; /* power of two */
    int atom_count;
    int atom_size;
    int atom_count_resize; /* resize hash table at this count */
    uint32_t *atom_hash;
    JSAtomStruct **atom_array;
    int atom_free_index; /* 0 = none */

    int class_count;    /* size of class_array */
    JSClass *class_array;

    struct list_head context_list; /* list of JSContext.link */
    /* list of JSGCObjectHeader.link. List of allocated GC objects (used
       by the garbage collector) */
    struct list_head gc_obj_list;
    /* list of JSGCObjectHeader.link. Used during JS_FreeValueRT() */
    struct list_head gc_zero_ref_count_list;
    struct list_head tmp_obj_list; /* used during GC */
    JSGCPhaseEnum gc_phase : 8;
    size_t malloc_gc_threshold;
#ifdef DUMP_LEAKS
    struct list_head string_list; /* list of JSString.link */
#endif
    /* stack limitation */
    uintptr_t stack_size; /* in bytes, 0 if no limit */
    uintptr_t stack_top;
    uintptr_t stack_limit; /* lower stack limit */

    JSValue current_exception;
    /* true if inside an out of memory error, to avoid recursing */
    BOOL in_out_of_memory : 8;

    struct JSStackFrame *current_stack_frame;

    JSInterruptHandler *interrupt_handler;
    void *interrupt_opaque;

    JSHostPromiseRejectionTracker *host_promise_rejection_tracker;
    void *host_promise_rejection_tracker_opaque;

    struct list_head job_list; /* list of JSJobEntry.link */

    JSModuleNormalizeFunc *module_normalize_func;
    JSModuleLoaderFunc *module_loader_func;
    void *module_loader_opaque;

    BOOL can_block : 8; /* TRUE if Atomics.wait can block */
    /* used to allocate, free and clone SharedArrayBuffers */
    JSSharedArrayBufferFunctions sab_funcs;

    /* Shape hash table */
    int shape_hash_bits;
    int shape_hash_size;
    int shape_hash_count; /* number of hashed shapes */
    JSShape **shape_hash;
#ifdef CONFIG_BIGNUM
    bf_context_t bf_ctx;
    JSNumericOperations bigint_ops;
    JSNumericOperations bigfloat_ops;
    JSNumericOperations bigdecimal_ops;
    uint32_t operator_count;
#endif
    void *user_opaque;
};

struct JSClass {
    uint32_t class_id; /* 0 means free entry */
    JSAtom class_name;
    JSClassFinalizer *finalizer;
    JSClassGCMark *gc_mark;
    JSClassCall *call;
    /* pointers for exotic behavior, can be NULL if none are present */
    const JSClassExoticMethods *exotic;
};

#define JS_MODE_STRICT (1 << 0)
#define JS_MODE_STRIP  (1 << 1)
#define JS_MODE_MATH   (1 << 2)

typedef struct JSStackFrame {
    struct JSStackFrame *prev_frame; /* NULL if first stack frame */
    JSValue cur_func; /* current function, JS_UNDEFINED if the frame is detached */
    JSValue *arg_buf; /* arguments */
    JSValue *var_buf; /* variables */
    struct list_head var_ref_list; /* list of JSVarRef.link */
    const uint8_t *cur_pc; /* only used in bytecode functions : PC of the
                        instruction after the call */
    int arg_count;
    int js_mode; /* 0 or JS_MODE_MATH for C functions */
    /* only used in generators. Current stack pointer value. NULL if
       the function is running. */
    JSValue *cur_sp;
} JSStackFrame;

typedef enum {
    JS_GC_OBJ_TYPE_JS_OBJECT,
    JS_GC_OBJ_TYPE_FUNCTION_BYTECODE,
    JS_GC_OBJ_TYPE_SHAPE,
    JS_GC_OBJ_TYPE_VAR_REF,
    JS_GC_OBJ_TYPE_ASYNC_FUNCTION,
    JS_GC_OBJ_TYPE_JS_CONTEXT,
} JSGCObjectTypeEnum;

/* header for GC objects. GC objects are C data structures with a
   reference count that can reference other GC objects. JS Objects are
   a particular type of GC object. */
struct JSGCObjectHeader {
    int ref_count; /* must come first, 32-bit */
    JSGCObjectTypeEnum gc_obj_type : 4;
    uint8_t mark : 4; /* used by the GC */
    uint8_t dummy1; /* not used by the GC */
    uint16_t dummy2; /* not used by the GC */
    struct list_head link;
};

typedef struct JSVarRef {
    union {
        JSGCObjectHeader header; /* must come first */
        struct {
            int __gc_ref_count; /* corresponds to header.ref_count */
            uint8_t __gc_mark; /* corresponds to header.mark/gc_obj_type */

            /* 0 : the JSVarRef is on the stack. header.link is an element
               of JSStackFrame.var_ref_list.
               1 : the JSVarRef is detached. header.link has the normal meanning
            */
            uint8_t is_detached : 1;
            uint8_t is_arg : 1;
            uint16_t var_idx; /* index of the corresponding function variable on
                                 the stack */
        };
    };
    JSValue *pvalue; /* pointer to the value, either on the stack or
                        to 'value' */
    JSValue value; /* used when the variable is no longer on the stack */
} JSVarRef;

#ifdef CONFIG_BIGNUM
typedef struct JSFloatEnv {
    limb_t prec;
    bf_flags_t flags;
    unsigned int status;
} JSFloatEnv;

/* the same structure is used for big integers and big floats. Big
   integers are never infinite or NaNs */
typedef struct JSBigFloat {
    JSRefCountHeader header; /* must come first, 32-bit */
    bf_t num;
} JSBigFloat;

typedef struct JSBigDecimal {
    JSRefCountHeader header; /* must come first, 32-bit */
    bfdec_t num;
} JSBigDecimal;
#endif

typedef enum {
    JS_AUTOINIT_ID_PROTOTYPE,
    JS_AUTOINIT_ID_MODULE_NS,
    JS_AUTOINIT_ID_PROP,
} JSAutoInitIDEnum;

/* must be large enough to have a negligible runtime cost and small
   enough to call the interrupt callback often. */
#define JS_INTERRUPT_COUNTER_INIT 10000

struct JSContext {
    JSGCObjectHeader header; /* must come first */
    JSRuntime *rt;
    struct list_head link;

    uint16_t binary_object_count;
    int binary_object_size;

    JSShape *array_shape;   /* initial shape for Array objects */

    JSValue *class_proto;
    JSValue function_proto;
    JSValue function_ctor;
    JSValue array_ctor;
    JSValue regexp_ctor;
    JSValue promise_ctor;
    JSValue native_error_proto[JS_NATIVE_ERROR_COUNT];
    JSValue iterator_proto;
    JSValue async_iterator_proto;
    JSValue array_proto_values;
    JSValue throw_type_error;
    JSValue eval_obj;

    JSValue global_obj; /* global object */
    JSValue global_var_obj; /* contains the global let/const definitions */

    uint64_t random_state;
#ifdef CONFIG_BIGNUM
    bf_context_t *bf_ctx;   /* points to rt->bf_ctx, shared by all contexts */
    JSFloatEnv fp_env; /* global FP environment */
    BOOL bignum_ext : 8; /* enable math mode */
    BOOL allow_operator_overloading : 8;
#endif
    /* when the counter reaches zero, JSRutime.interrupt_handler is called */
    int interrupt_counter;
    BOOL is_error_property_enabled;

    struct list_head loaded_modules; /* list of JSModuleDef.link */

    /* if NULL, RegExp compilation is not supported */
    JSValue (*compile_regexp)(JSContext *ctx, JSValueConst pattern,
                              JSValueConst flags);
    /* if NULL, eval is not supported */
    JSValue (*eval_internal)(JSContext *ctx, JSValueConst this_obj,
                             const char *input, size_t input_len,
                             const char *filename, int flags, int scope_idx);
    void *user_opaque;
};

typedef union JSFloat64Union {
    double d;
    uint64_t u64;
    uint32_t u32[2];
} JSFloat64Union;

enum {
    JS_ATOM_TYPE_STRING = 1,
    JS_ATOM_TYPE_GLOBAL_SYMBOL,
    JS_ATOM_TYPE_SYMBOL,
    JS_ATOM_TYPE_PRIVATE,
};

enum {
    JS_ATOM_HASH_SYMBOL,
    JS_ATOM_HASH_PRIVATE,
};

typedef enum {
    JS_ATOM_KIND_STRING,
    JS_ATOM_KIND_SYMBOL,
    JS_ATOM_KIND_PRIVATE,
} JSAtomKindEnum;

#define JS_ATOM_HASH_MASK  ((1 << 30) - 1)

struct JSString {
    JSRefCountHeader header; /* must come first, 32-bit */
    uint32_t len : 31;
    uint8_t is_wide_char : 1; /* 0 = 8 bits, 1 = 16 bits characters */
    /* for JS_ATOM_TYPE_SYMBOL: hash = 0, atom_type = 3,
       for JS_ATOM_TYPE_PRIVATE: hash = 1, atom_type = 3
       XXX: could change encoding to have one more bit in hash */
    uint32_t hash : 30;
    uint8_t atom_type : 2; /* != 0 if atom, JS_ATOM_TYPE_x */
    uint32_t hash_next; /* atom_index for JS_ATOM_TYPE_SYMBOL */
#ifdef DUMP_LEAKS
    struct list_head link; /* string list */
#endif
    union {
        uint8_t str8[0]; /* 8 bit strings will get an extra null terminator */
        uint16_t str16[0];
    } u;
};

typedef struct JSClosureVar {
    uint8_t is_local : 1;
    uint8_t is_arg : 1;
    uint8_t is_const : 1;
    uint8_t is_lexical : 1;
    uint8_t var_kind : 4; /* see JSVarKindEnum */
    /* 8 bits available */
    uint16_t var_idx; /* is_local = TRUE: index to a normal variable of the
                    parent function. otherwise: index to a closure
                    variable of the parent function */
    JSAtom var_name;
} JSClosureVar;

#define ARG_SCOPE_INDEX 1
#define ARG_SCOPE_END (-2)

typedef struct JSVarScope {
    int parent;  /* index into fd->scopes of the enclosing scope */
    int first;   /* index into fd->vars of the last variable in this scope */
} JSVarScope;

typedef enum {
    /* XXX: add more variable kinds here instead of using bit fields */
    JS_VAR_NORMAL,
    JS_VAR_FUNCTION_DECL, /* lexical var with function declaration */
    JS_VAR_NEW_FUNCTION_DECL, /* lexical var with async/generator
                                 function declaration */
    JS_VAR_CATCH,
    JS_VAR_FUNCTION_NAME, /* function expression name */
    JS_VAR_PRIVATE_FIELD,
    JS_VAR_PRIVATE_METHOD,
    JS_VAR_PRIVATE_GETTER,
    JS_VAR_PRIVATE_SETTER, /* must come after JS_VAR_PRIVATE_GETTER */
    JS_VAR_PRIVATE_GETTER_SETTER, /* must come after JS_VAR_PRIVATE_SETTER */
} JSVarKindEnum;

/* XXX: could use a different structure in bytecode functions to save
   memory */
typedef struct JSVarDef {
    JSAtom var_name;
    /* index into fd->scopes of this variable lexical scope */
    int scope_level;
    /* during compilation:
        - if scope_level = 0: scope in which the variable is defined
        - if scope_level != 0: index into fd->vars of the next
          variable in the same or enclosing lexical scope
       in a bytecode function:
       index into fd->vars of the next
       variable in the same or enclosing lexical scope
    */
    int scope_next;
    uint8_t is_const : 1;
    uint8_t is_lexical : 1;
    uint8_t is_captured : 1;
    uint8_t var_kind : 4; /* see JSVarKindEnum */
    /* only used during compilation: function pool index for lexical
       variables with var_kind =
       JS_VAR_FUNCTION_DECL/JS_VAR_NEW_FUNCTION_DECL or scope level of
       the definition of the 'var' variables (they have scope_level =
       0) */
    int func_pool_idx : 24; /* only used during compilation : index in
                               the constant pool for hoisted function
                               definition */
} JSVarDef;

/* for the encoding of the pc2line table */
#define PC2LINE_BASE     (-1)
#define PC2LINE_RANGE    5
#define PC2LINE_OP_FIRST 1
#define PC2LINE_DIFF_PC_MAX ((255 - PC2LINE_OP_FIRST) / PC2LINE_RANGE)

typedef enum JSFunctionKindEnum {
    JS_FUNC_NORMAL = 0,
    JS_FUNC_GENERATOR = (1 << 0),
    JS_FUNC_ASYNC = (1 << 1),
    JS_FUNC_ASYNC_GENERATOR = (JS_FUNC_GENERATOR | JS_FUNC_ASYNC),
} JSFunctionKindEnum;

typedef struct JSFunctionBytecode {
    JSGCObjectHeader header; /* must come first */
    uint8_t js_mode;
    uint8_t has_prototype : 1; /* true if a prototype field is necessary */
    uint8_t has_simple_parameter_list : 1;
    uint8_t is_derived_class_constructor : 1;
    /* true if home_object needs to be initialized */
    uint8_t need_home_object : 1;
    uint8_t func_kind : 2;
    uint8_t new_target_allowed : 1;
    uint8_t super_call_allowed : 1;
    uint8_t super_allowed : 1;
    uint8_t arguments_allowed : 1;
    uint8_t has_debug : 1;
    uint8_t backtrace_barrier : 1; /* stop backtrace on this function */
    uint8_t read_only_bytecode : 1;
    /* XXX: 4 bits available */
    uint8_t *byte_code_buf; /* (self pointer) */
    int byte_code_len;
    JSAtom func_name;
    JSVarDef *vardefs; /* arguments + local variables (arg_count + var_count) (self pointer) */
    JSClosureVar *closure_var; /* list of variables in the closure (self pointer) */
    uint16_t arg_count;
    uint16_t var_count;
    uint16_t defined_arg_count; /* for length function property */
    uint16_t stack_size; /* maximum stack size */
    JSContext *realm; /* function realm */
    JSValue *cpool; /* constant pool (self pointer) */
    int cpool_count;
    int closure_var_count;
    struct {
        /* debug info, move to separate structure to save memory? */
        JSAtom filename;
        int line_num;
        int source_len;
        int pc2line_len;
        uint8_t *pc2line_buf;
        char *source;
    } debug;
} JSFunctionBytecode;

typedef struct JSBoundFunction {
    JSValue func_obj;
    JSValue this_val;
    int argc;
    JSValue argv[0];
} JSBoundFunction;

typedef enum JSIteratorKindEnum {
    JS_ITERATOR_KIND_KEY,
    JS_ITERATOR_KIND_VALUE,
    JS_ITERATOR_KIND_KEY_AND_VALUE,
} JSIteratorKindEnum;

typedef struct JSForInIterator {
    JSValue obj;
    BOOL is_array;
    uint32_t array_length;
    uint32_t idx;
} JSForInIterator;

typedef struct JSRegExp {
    JSString *pattern;
    JSString *bytecode; /* also contains the flags */
} JSRegExp;

typedef struct JSProxyData {
    JSValue target;
    JSValue handler;
    uint8_t is_func;
    uint8_t is_revoked;
} JSProxyData;

typedef struct JSArrayBuffer {
    int byte_length; /* 0 if detached */
    uint8_t detached;
    uint8_t shared; /* if shared, the array buffer cannot be detached */
    uint8_t *data; /* NULL if detached */
    struct list_head array_list;
    void *opaque;
    JSFreeArrayBufferDataFunc *free_func;
} JSArrayBuffer;

typedef struct JSTypedArray {
    struct list_head link; /* link to arraybuffer */
    JSObject *obj; /* back pointer to the TypedArray/DataView object */
    JSObject *buffer; /* based array buffer */
    uint32_t offset; /* offset in the array buffer */
    uint32_t length; /* length in the array buffer */
} JSTypedArray;

typedef struct JSAsyncFunctionState {
    JSValue this_val; /* 'this' generator argument */
    int argc; /* number of function arguments */
    BOOL throw_flag; /* used to throw an exception in JS_CallInternal() */
    JSStackFrame frame;
} JSAsyncFunctionState;

/* XXX: could use an object instead to avoid the
   JS_TAG_ASYNC_FUNCTION tag for the GC */
typedef struct JSAsyncFunctionData {
    JSGCObjectHeader header; /* must come first */
    JSValue resolving_funcs[2];
    BOOL is_active; /* true if the async function state is valid */
    JSAsyncFunctionState func_state;
} JSAsyncFunctionData;

typedef enum {
   /* binary operators */
   JS_OVOP_ADD,
   JS_OVOP_SUB,
   JS_OVOP_MUL,
   JS_OVOP_DIV,
   JS_OVOP_MOD,
   JS_OVOP_POW,
   JS_OVOP_OR,
   JS_OVOP_AND,
   JS_OVOP_XOR,
   JS_OVOP_SHL,
   JS_OVOP_SAR,
   JS_OVOP_SHR,
   JS_OVOP_EQ,
   JS_OVOP_LESS,

   JS_OVOP_BINARY_COUNT,
   /* unary operators */
   JS_OVOP_POS = JS_OVOP_BINARY_COUNT,
   JS_OVOP_NEG,
   JS_OVOP_INC,
   JS_OVOP_DEC,
   JS_OVOP_NOT,

   JS_OVOP_COUNT,
} JSOverloadableOperatorEnum;

typedef struct {
    uint32_t operator_index;
    JSObject *ops[JS_OVOP_BINARY_COUNT]; /* self operators */
} JSBinaryOperatorDefEntry;

typedef struct {
    int count;
    JSBinaryOperatorDefEntry *tab;
} JSBinaryOperatorDef;

typedef struct {
    uint32_t operator_counter;
    BOOL is_primitive; /* OperatorSet for a primitive type */
    /* NULL if no operator is defined */
    JSObject *self_ops[JS_OVOP_COUNT]; /* self operators */
    JSBinaryOperatorDef left;
    JSBinaryOperatorDef right;
} JSOperatorSetData;

typedef struct JSReqModuleEntry {
    JSAtom module_name;
    JSModuleDef *module; /* used using resolution */
} JSReqModuleEntry;

typedef enum JSExportTypeEnum {
    JS_EXPORT_TYPE_LOCAL,
    JS_EXPORT_TYPE_INDIRECT,
} JSExportTypeEnum;

typedef struct JSExportEntry {
    union {
        struct {
            int var_idx; /* closure variable index */
            JSVarRef *var_ref; /* if != NULL, reference to the variable */
        } local; /* for local export */
        int req_module_idx; /* module for indirect export */
    } u;
    JSExportTypeEnum export_type;
    JSAtom local_name; /* '*' if export ns from. not used for local
                          export after compilation */
    JSAtom export_name; /* exported variable name */
} JSExportEntry;

typedef struct JSStarExportEntry {
    int req_module_idx; /* in req_module_entries */
} JSStarExportEntry;

typedef struct JSImportEntry {
    int var_idx; /* closure variable index */
    JSAtom import_name;
    int req_module_idx; /* in req_module_entries */
} JSImportEntry;

struct JSModuleDef {
    JSRefCountHeader header; /* must come first, 32-bit */
    JSAtom module_name;
    struct list_head link;

    JSReqModuleEntry *req_module_entries;
    int req_module_entries_count;
    int req_module_entries_size;

    JSExportEntry *export_entries;
    int export_entries_count;
    int export_entries_size;

    JSStarExportEntry *star_export_entries;
    int star_export_entries_count;
    int star_export_entries_size;

    JSImportEntry *import_entries;
    int import_entries_count;
    int import_entries_size;

    JSValue module_ns;
    JSValue func_obj; /* only used for JS modules */
    JSModuleInitFunc *init_func; /* only used for C modules */
    BOOL resolved : 8;
    BOOL func_created : 8;
    BOOL instantiated : 8;
    BOOL evaluated : 8;
    BOOL eval_mark : 8; /* temporary use during js_evaluate_module() */
    /* true if evaluation yielded an exception. It is saved in
       eval_exception */
    BOOL eval_has_exception : 8;
    JSValue eval_exception;
    JSValue meta_obj; /* for import.meta */
};

typedef struct JSJobEntry {
    struct list_head link;
    JSContext *ctx;
    JSJobFunc *job_func;
    int argc;
    JSValue argv[0];
} JSJobEntry;

typedef struct JSProperty {
    union {
        JSValue value;      /* JS_PROP_NORMAL */
        struct {            /* JS_PROP_GETSET */
            JSObject *getter; /* NULL if undefined */
            JSObject *setter; /* NULL if undefined */
        } getset;
        JSVarRef *var_ref;  /* JS_PROP_VARREF */
        struct {            /* JS_PROP_AUTOINIT */
            /* in order to use only 2 pointers, we compress the realm
               and the init function pointer */
            uintptr_t realm_and_id; /* realm and init_id (JS_AUTOINIT_ID_x)
                                       in the 2 low bits */
            void *opaque;
        } init;
    } u;
} JSProperty;

#define JS_PROP_INITIAL_SIZE 2
#define JS_PROP_INITIAL_HASH_SIZE 4 /* must be a power of two */
#define JS_ARRAY_INITIAL_SIZE 2

typedef struct JSShapeProperty {
    uint32_t hash_next : 26; /* 0 if last in list */
    uint32_t flags : 6;   /* JS_PROP_XXX */
    JSAtom atom; /* JS_ATOM_NULL = free property entry */
} JSShapeProperty;

struct JSShape {
    /* hash table of size hash_mask + 1 before the start of the
       structure (see prop_hash_end()). */
    JSGCObjectHeader header;
    /* true if the shape is inserted in the shape hash table. If not,
       JSShape.hash is not valid */
    uint8_t is_hashed;
    /* If true, the shape may have small array index properties 'n' with 0
       <= n <= 2^31-1. If false, the shape is guaranteed not to have
       small array index properties */
    uint8_t has_small_array_index;
    uint32_t hash; /* current hash value */
    uint32_t prop_hash_mask;
    int prop_size; /* allocated properties */
    int prop_count; /* include deleted properties */
    int deleted_prop_count;
    JSShape *shape_hash_next; /* in JSRuntime.shape_hash[h] list */
    JSObject *proto;
    JSShapeProperty prop[0]; /* prop_size elements */
};

struct JSObject {
    union {
        JSGCObjectHeader header;
        struct {
            int __gc_ref_count; /* corresponds to header.ref_count */
            uint8_t __gc_mark; /* corresponds to header.mark/gc_obj_type */

            uint8_t extensible : 1;
            uint8_t free_mark : 1; /* only used when freeing objects with cycles */
            uint8_t is_exotic : 1; /* TRUE if object has exotic property handlers */
            uint8_t fast_array : 1; /* TRUE if u.array is used for get/put (for JS_CLASS_ARRAY, JS_CLASS_ARGUMENTS and typed arrays) */
            uint8_t is_constructor : 1; /* TRUE if object is a constructor function */
            uint8_t is_uncatchable_error : 1; /* if TRUE, error is not catchable */
            uint8_t tmp_mark : 1; /* used in JS_WriteObjectRec() */
            uint8_t is_HTMLDDA : 1; /* specific annex B IsHtmlDDA behavior */
            uint16_t class_id; /* see JS_CLASS_x */
        };
    };
    /* byte offsets: 16/24 */
    JSShape *shape; /* prototype and property names + flag */
    JSProperty *prop; /* array of properties */
    /* byte offsets: 24/40 */
    struct JSMapRecord *first_weak_ref; /* XXX: use a bit and an external hash table? */
    /* byte offsets: 28/48 */
    union {
        void *opaque;
        struct JSBoundFunction *bound_function; /* JS_CLASS_BOUND_FUNCTION */
        struct JSCFunctionDataRecord *c_function_data_record; /* JS_CLASS_C_FUNCTION_DATA */
        struct JSForInIterator *for_in_iterator; /* JS_CLASS_FOR_IN_ITERATOR */
        struct JSArrayBuffer *array_buffer; /* JS_CLASS_ARRAY_BUFFER, JS_CLASS_SHARED_ARRAY_BUFFER */
        struct JSTypedArray *typed_array; /* JS_CLASS_UINT8C_ARRAY..JS_CLASS_DATAVIEW */
#ifdef CONFIG_BIGNUM
        struct JSFloatEnv *float_env; /* JS_CLASS_FLOAT_ENV */
        struct JSOperatorSetData *operator_set; /* JS_CLASS_OPERATOR_SET */
#endif
        struct JSMapState *map_state;   /* JS_CLASS_MAP..JS_CLASS_WEAKSET */
        struct JSMapIteratorData *map_iterator_data; /* JS_CLASS_MAP_ITERATOR, JS_CLASS_SET_ITERATOR */
        struct JSArrayIteratorData *array_iterator_data; /* JS_CLASS_ARRAY_ITERATOR, JS_CLASS_STRING_ITERATOR */
        struct JSRegExpStringIteratorData *regexp_string_iterator_data; /* JS_CLASS_REGEXP_STRING_ITERATOR */
        struct JSGeneratorData *generator_data; /* JS_CLASS_GENERATOR */
        struct JSProxyData *proxy_data; /* JS_CLASS_PROXY */
        struct JSPromiseData *promise_data; /* JS_CLASS_PROMISE */
        struct JSPromiseFunctionData *promise_function_data; /* JS_CLASS_PROMISE_RESOLVE_FUNCTION, JS_CLASS_PROMISE_REJECT_FUNCTION */
        struct JSAsyncFunctionData *async_function_data; /* JS_CLASS_ASYNC_FUNCTION_RESOLVE, JS_CLASS_ASYNC_FUNCTION_REJECT */
        struct JSAsyncFromSyncIteratorData *async_from_sync_iterator_data; /* JS_CLASS_ASYNC_FROM_SYNC_ITERATOR */
        struct JSAsyncGeneratorData *async_generator_data; /* JS_CLASS_ASYNC_GENERATOR */
        struct { /* JS_CLASS_BYTECODE_FUNCTION: 12/24 bytes */
            /* also used by JS_CLASS_GENERATOR_FUNCTION, JS_CLASS_ASYNC_FUNCTION and JS_CLASS_ASYNC_GENERATOR_FUNCTION */
            struct JSFunctionBytecode *function_bytecode;
            JSVarRef **var_refs;
            JSObject *home_object; /* for 'super' access */
        } func;
        struct { /* JS_CLASS_C_FUNCTION: 12/20 bytes */
            JSContext *realm;
            JSCFunctionType c_function;
            uint8_t length;
            uint8_t cproto;
            int16_t magic;
        } cfunc;
        /* array part for fast arrays and typed arrays */
        struct { /* JS_CLASS_ARRAY, JS_CLASS_ARGUMENTS, JS_CLASS_UINT8C_ARRAY..JS_CLASS_FLOAT64_ARRAY */
            union {
                uint32_t size;          /* JS_CLASS_ARRAY, JS_CLASS_ARGUMENTS */
                struct JSTypedArray *typed_array; /* JS_CLASS_UINT8C_ARRAY..JS_CLASS_FLOAT64_ARRAY */
            } u1;
            union {
                JSValue *values;        /* JS_CLASS_ARRAY, JS_CLASS_ARGUMENTS */
                void *ptr;              /* JS_CLASS_UINT8C_ARRAY..JS_CLASS_FLOAT64_ARRAY */
                int8_t *int8_ptr;       /* JS_CLASS_INT8_ARRAY */
                uint8_t *uint8_ptr;     /* JS_CLASS_UINT8_ARRAY, JS_CLASS_UINT8C_ARRAY */
                int16_t *int16_ptr;     /* JS_CLASS_INT16_ARRAY */
                uint16_t *uint16_ptr;   /* JS_CLASS_UINT16_ARRAY */
                int32_t *int32_ptr;     /* JS_CLASS_INT32_ARRAY */
                uint32_t *uint32_ptr;   /* JS_CLASS_UINT32_ARRAY */
                int64_t *int64_ptr;     /* JS_CLASS_INT64_ARRAY */
                uint64_t *uint64_ptr;   /* JS_CLASS_UINT64_ARRAY */
                float *float_ptr;       /* JS_CLASS_FLOAT32_ARRAY */
                double *double_ptr;     /* JS_CLASS_FLOAT64_ARRAY */
            } u;
            uint32_t count; /* <= 2^31-1. 0 for a detached typed array */
        } array;    /* 12/20 bytes */
        JSRegExp regexp;    /* JS_CLASS_REGEXP: 8/16 bytes */
        JSValue object_data;    /* for JS_SetObjectData(): 8/16/16 bytes */
    } u;
    /* byte sizes: 40/48/72 */
};

#define QUICKJS_ATOMS(X, BIGNUM_X, ATOMICS_X) \
    /* Note: first atoms are considered as keywords in the parser */ \
    X(null, "null") /* must be first */ \
    X(false, "false") \
    X(true, "true") \
    X(if, "if") \
    X(else, "else") \
    X(return, "return") \
    X(var, "var") \
    X(this, "this") \
    X(delete, "delete") \
    X(void, "void") \
    X(typeof, "typeof") \
    X(new, "new") \
    X(in, "in") \
    X(instanceof, "instanceof") \
    X(do, "do") \
    X(while, "while") \
    X(for, "for") \
    X(break, "break") \
    X(continue, "continue") \
    X(switch, "switch") \
    X(case, "case") \
    X(default, "default") \
    X(throw, "throw") \
    X(try, "try") \
    X(catch, "catch") \
    X(finally, "finally") \
    X(function, "function") \
    X(debugger, "debugger") \
    X(with, "with") \
    /* FutureReservedWord */ \
    X(class, "class") \
    X(const, "const") \
    X(enum, "enum") \
    X(export, "export") \
    X(extends, "extends") \
    X(import, "import") \
    X(super, "super") \
    /* FutureReservedWords when parsing strict mode code */ \
    X(implements, "implements") \
    X(interface, "interface") \
    X(let, "let") \
    X(package, "package") \
    X(private, "private") \
    X(protected, "protected") \
    X(public, "public") \
    X(static, "static") \
    X(yield, "yield") \
    X(await, "await") \
 \
    /* empty string */ \
    X(empty_string, "") \
    /* identifiers */ \
    X(length, "length") \
    X(fileName, "fileName") \
    X(lineNumber, "lineNumber") \
    X(message, "message") \
    X(errors, "errors") \
    X(stack, "stack") \
    X(name, "name") \
    X(toString, "toString") \
    X(toLocaleString, "toLocaleString") \
    X(valueOf, "valueOf") \
    X(eval, "eval") \
    X(prototype, "prototype") \
    X(constructor, "constructor") \
    X(configurable, "configurable") \
    X(writable, "writable") \
    X(enumerable, "enumerable") \
    X(value, "value") \
    X(get, "get") \
    X(set, "set") \
    X(of, "of") \
    X(__proto__, "__proto__") \
    X(undefined, "undefined") \
    X(number, "number") \
    X(boolean, "boolean") \
    X(string, "string") \
    X(object, "object") \
    X(symbol, "symbol") \
    X(integer, "integer") \
    X(unknown, "unknown") \
    X(arguments, "arguments") \
    X(callee, "callee") \
    X(caller, "caller") \
    X(_eval_, "<eval>") \
    X(_ret_, "<ret>") \
    X(_var_, "<var>") \
    X(_arg_var_, "<arg_var>") \
    X(_with_, "<with>") \
    X(lastIndex, "lastIndex") \
    X(target, "target") \
    X(index, "index") \
    X(input, "input") \
    X(defineProperties, "defineProperties") \
    X(apply, "apply") \
    X(join, "join") \
    X(concat, "concat") \
    X(split, "split") \
    X(construct, "construct") \
    X(getPrototypeOf, "getPrototypeOf") \
    X(setPrototypeOf, "setPrototypeOf") \
    X(isExtensible, "isExtensible") \
    X(preventExtensions, "preventExtensions") \
    X(has, "has") \
    X(deleteProperty, "deleteProperty") \
    X(defineProperty, "defineProperty") \
    X(getOwnPropertyDescriptor, "getOwnPropertyDescriptor") \
    X(ownKeys, "ownKeys") \
    X(add, "add") \
    X(done, "done") \
    X(next, "next") \
    X(values, "values") \
    X(source, "source") \
    X(flags, "flags") \
    X(global, "global") \
    X(unicode, "unicode") \
    X(raw, "raw") \
    X(new_target, "new.target") \
    X(this_active_func, "this.active_func") \
    X(home_object, "<home_object>") \
    X(computed_field, "<computed_field>") \
    X(static_computed_field, "<static_computed_field>") /* must come after computed_fields */ \
    X(class_fields_init, "<class_fields_init>") \
    X(brand, "<brand>") \
    X(hash_constructor, "#constructor") \
    X(as, "as") \
    X(from, "from") \
    X(meta, "meta") \
    X(_default_, "*default*") \
    X(_star_, "*") \
    X(Module, "Module") \
    X(then, "then") \
    X(resolve, "resolve") \
    X(reject, "reject") \
    X(promise, "promise") \
    X(proxy, "proxy") \
    X(revoke, "revoke") \
    X(async, "async") \
    X(exec, "exec") \
    X(groups, "groups") \
    X(status, "status") \
    X(reason, "reason") \
    X(globalThis, "globalThis") \
    BIGNUM_X(bigint, "bigint") \
    BIGNUM_X(bigfloat, "bigfloat") \
    BIGNUM_X(bigdecimal, "bigdecimal") \
    BIGNUM_X(roundingMode, "roundingMode") \
    BIGNUM_X(maximumSignificantDigits, "maximumSignificantDigits") \
    BIGNUM_X(maximumFractionDigits, "maximumFractionDigits") \
    ATOMICS_X(not_equal, "not-equal") \
    ATOMICS_X(timed_out, "timed-out") \
    ATOMICS_X(ok, "ok") \
    X(toJSON, "toJSON") \
    /* class names */ \
    X(Object, "Object") \
    X(Array, "Array") \
    X(Error, "Error") \
    X(Number, "Number") \
    X(String, "String") \
    X(Boolean, "Boolean") \
    X(Symbol, "Symbol") \
    X(Arguments, "Arguments") \
    X(Math, "Math") \
    X(JSON, "JSON") \
    X(Date, "Date") \
    X(Function, "Function") \
    X(GeneratorFunction, "GeneratorFunction") \
    X(ForInIterator, "ForInIterator") \
    X(RegExp, "RegExp") \
    X(ArrayBuffer, "ArrayBuffer") \
    X(SharedArrayBuffer, "SharedArrayBuffer") \
    /* must keep same order as class IDs for typed arrays */ \
    X(Uint8ClampedArray, "Uint8ClampedArray") \
    X(Int8Array, "Int8Array") \
    X(Uint8Array, "Uint8Array") \
    X(Int16Array, "Int16Array") \
    X(Uint16Array, "Uint16Array") \
    X(Int32Array, "Int32Array") \
    X(Uint32Array, "Uint32Array") \
    BIGNUM_X(BigInt64Array, "BigInt64Array") \
    BIGNUM_X(BigUint64Array, "BigUint64Array") \
    X(Float32Array, "Float32Array") \
    X(Float64Array, "Float64Array") \
    X(DataView, "DataView") \
    BIGNUM_X(BigInt, "BigInt") \
    BIGNUM_X(BigFloat, "BigFloat") \
    BIGNUM_X(BigFloatEnv, "BigFloatEnv") \
    BIGNUM_X(BigDecimal, "BigDecimal") \
    BIGNUM_X(OperatorSet, "OperatorSet") \
    BIGNUM_X(Operators, "Operators") \
    X(Map, "Map") \
    X(Set, "Set") /* Map + 1 */ \
    X(WeakMap, "WeakMap") /* Map + 2 */ \
    X(WeakSet, "WeakSet") /* Map + 3 */ \
    X(Map_Iterator, "Map Iterator") \
    X(Set_Iterator, "Set Iterator") \
    X(Array_Iterator, "Array Iterator") \
    X(String_Iterator, "String Iterator") \
    X(RegExp_String_Iterator, "RegExp String Iterator") \
    X(Generator, "Generator") \
    X(Proxy, "Proxy") \
    X(Promise, "Promise") \
    X(PromiseResolveFunction, "PromiseResolveFunction") \
    X(PromiseRejectFunction, "PromiseRejectFunction") \
    X(AsyncFunction, "AsyncFunction") \
    X(AsyncFunctionResolve, "AsyncFunctionResolve") \
    X(AsyncFunctionReject, "AsyncFunctionReject") \
    X(AsyncGeneratorFunction, "AsyncGeneratorFunction") \
    X(AsyncGenerator, "AsyncGenerator") \
    X(EvalError, "EvalError") \
    X(RangeError, "RangeError") \
    X(ReferenceError, "ReferenceError") \
    X(SyntaxError, "SyntaxError") \
    X(TypeError, "TypeError") \
    X(URIError, "URIError") \
    X(InternalError, "InternalError") \
    /* private symbols */ \
    X(Private_brand, "<brand>") \
    /* symbols */ \
    X(Symbol_toPrimitive, "Symbol.toPrimitive") \
    X(Symbol_iterator, "Symbol.iterator") \
    X(Symbol_match, "Symbol.match") \
    X(Symbol_matchAll, "Symbol.matchAll") \
    X(Symbol_replace, "Symbol.replace") \
    X(Symbol_search, "Symbol.search") \
    X(Symbol_split, "Symbol.split") \
    X(Symbol_toStringTag, "Symbol.toStringTag") \
    X(Symbol_isConcatSpreadable, "Symbol.isConcatSpreadable") \
    X(Symbol_hasInstance, "Symbol.hasInstance") \
    X(Symbol_species, "Symbol.species") \
    X(Symbol_unscopables, "Symbol.unscopables") \
    X(Symbol_asyncIterator, "Symbol.asyncIterator") \
    BIGNUM_X(Symbol_operatorSet, "Symbol.operatorSet") \



enum {
    __JS_ATOM_NULL = JS_ATOM_NULL,
#define DEF(name, str) JS_ATOM_ ## name,
#ifdef CONFIG_BIGNUM
 #define DEF_BIGNUM(name, str) JS_ATOM_ ## name,
#else
 #define DEF_BIGNUM(name, str)
#endif
#ifdef CONFIG_ATOMICS
 #define DEF_ATOMIC(name, str) JS_ATOM_ ## name,
#else
 #define DEF_ATOMIC(name, str)
#endif

QUICKJS_ATOMS(DEF, DEF_BIGNUM, DEF_ATOMIC)

#undef DEF
#undef DEF_BIGNUM
#undef DEF_ATOMIC
    JS_ATOM_END,
};
#define JS_ATOM_LAST_KEYWORD JS_ATOM_super
#define JS_ATOM_LAST_STRICT_KEYWORD JS_ATOM_yield

static const char js_atom_init[] =
#define DEF(name, str) str "\0"

#ifdef CONFIG_BIGNUM
 #define DEF_BIGNUM(name, str) str "\0"
#else
 #define DEF_BIGNUM(name, str)
#endif
#ifdef CONFIG_ATOMICS
 #define DEF_ATOMIC(name, str) str "\0"
#else
 #define DEF_ATOMIC(name, str)
#endif

QUICKJS_ATOMS(DEF, DEF_BIGNUM, DEF_ATOMIC)

#undef DEF
#undef DEF_BIGNUM
#undef DEF_ATOMIC
;

typedef enum OPCodeFormat {
#define FMT(f) OP_FMT_ ## f,
#define DEF(id, size, n_pop, n_push, f)
QUICKJS_OPCODES(FMT, DEF, DEF)
#undef DEF
#undef FMT
} OPCodeFormat;

static int JS_InitAtoms(JSRuntime *rt);
static JSAtom __JS_NewAtomInit(JSRuntime *rt, const char *str, int len,
                               int atom_type);
static void JS_FreeAtomStruct(JSRuntime *rt, JSAtomStruct *p);
static void free_function_bytecode(JSRuntime *rt, JSFunctionBytecode *b);
static JSValue js_call_c_function(JSContext *ctx, JSValueConst func_obj,
                                  JSValueConst this_obj,
                                  int argc, JSValueConst *argv, int flags);
static JSValue js_call_bound_function(JSContext *ctx, JSValueConst func_obj,
                                      JSValueConst this_obj,
                                      int argc, JSValueConst *argv, int flags);
static JSValue JS_CallInternal(JSContext *ctx, JSValueConst func_obj,
                               JSValueConst this_obj, JSValueConst new_target,
                               int argc, JSValue *argv, int flags);
static JSValue JS_CallConstructorInternal(JSContext *ctx,
                                          JSValueConst func_obj,
                                          JSValueConst new_target,
                                          int argc, JSValue *argv, int flags);
static JSValue JS_CallFree(JSContext *ctx, JSValue func_obj, JSValueConst this_obj,
                           int argc, JSValueConst *argv);
static JSValue JS_InvokeFree(JSContext *ctx, JSValue this_val, JSAtom atom,
                             int argc, JSValueConst *argv);
[[nodiscard]] static int JS_ToArrayLengthFree(JSContext *ctx, uint32_t *plen,
                                            JSValue val, BOOL is_array_ctor);
static JSValue JS_EvalObject(JSContext *ctx, JSValueConst this_obj,
                             JSValueConst val, int flags, int scope_idx);
JSValue JS_ThrowInternalError(JSContext *ctx, const char *fmt, ...);
void JS_DumpAtoms(JSRuntime *rt);
void JS_DumpString(JSRuntime *rt, const JSString *p);
void JS_DumpObjectHeader(JSRuntime *rt);
void JS_DumpObject(JSRuntime *rt, JSObject *p);
void JS_DumpGCObject(JSRuntime *rt, JSGCObjectHeader *p);
void JS_DumpValueShort(JSRuntime *rt, JSValueConst val);
void JS_DumpValue(JSContext *ctx, JSValueConst val);
void JS_PrintValue(JSContext *ctx, const char *str, JSValueConst val);
void JS_DumpShapes(JSRuntime *rt);
static JSValue js_function_apply(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv, int magic);
static void js_array_finalizer(JSRuntime *rt, JSValue val);
static void js_array_mark(JSRuntime *rt, JSValueConst val,
                          JS_MarkFunc *mark_func);
static void js_object_data_finalizer(JSRuntime *rt, JSValue val);
static void js_object_data_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
static void js_c_function_finalizer(JSRuntime *rt, JSValue val);
static void js_c_function_mark(JSRuntime *rt, JSValueConst val,
                               JS_MarkFunc *mark_func);
static void js_bytecode_function_finalizer(JSRuntime *rt, JSValue val);
static void js_bytecode_function_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
static void js_bound_function_finalizer(JSRuntime *rt, JSValue val);
static void js_bound_function_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
static void js_for_in_iterator_finalizer(JSRuntime *rt, JSValue val);
static void js_for_in_iterator_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
static void js_regexp_finalizer(JSRuntime *rt, JSValue val);
static void js_array_buffer_finalizer(JSRuntime *rt, JSValue val);
static void js_typed_array_finalizer(JSRuntime *rt, JSValue val);
static void js_typed_array_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
static void js_proxy_finalizer(JSRuntime *rt, JSValue val);
static void js_proxy_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
static void js_map_finalizer(JSRuntime *rt, JSValue val);
static void js_map_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
static void js_map_iterator_finalizer(JSRuntime *rt, JSValue val);
static void js_map_iterator_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
static void js_array_iterator_finalizer(JSRuntime *rt, JSValue val);
static void js_array_iterator_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
static void js_regexp_string_iterator_finalizer(JSRuntime *rt, JSValue val);
static void js_regexp_string_iterator_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
static void js_generator_finalizer(JSRuntime *rt, JSValue obj);
static void js_generator_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
static void js_promise_finalizer(JSRuntime *rt, JSValue val);
static void js_promise_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
static void js_promise_resolve_function_finalizer(JSRuntime *rt, JSValue val);
static void js_promise_resolve_function_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func);
#ifdef CONFIG_BIGNUM
static void js_operator_set_finalizer(JSRuntime *rt, JSValue val);
static void js_operator_set_mark(JSRuntime *rt, JSValueConst val,
                                 JS_MarkFunc *mark_func);
#endif
static JSValue JS_ToStringFree(JSContext *ctx, JSValue val);
static int JS_ToBoolFree(JSContext *ctx, JSValue val);
static int JS_ToInt32Free(JSContext *ctx, int32_t *pres, JSValue val);
static int JS_ToFloat64Free(JSContext *ctx, double *pres, JSValue val);
static int JS_ToUint8ClampFree(JSContext *ctx, int32_t *pres, JSValue val);
static JSValue js_compile_regexp(JSContext *ctx, JSValueConst pattern,
                                 JSValueConst flags);
static JSValue js_regexp_constructor_internal(JSContext *ctx, JSValueConst ctor,
                                              JSValue pattern, JSValue bc);
static void gc_decref(JSRuntime *rt);
static int JS_NewClass1(JSRuntime *rt, JSClassID class_id,
                        const JSClassDef *class_def, JSAtom name);

typedef enum JSStrictEqModeEnum {
    JS_EQ_STRICT,
    JS_EQ_SAME_VALUE,
    JS_EQ_SAME_VALUE_ZERO,
} JSStrictEqModeEnum;

static BOOL js_strict_eq2(JSContext *ctx, JSValue op1, JSValue op2,
                          JSStrictEqModeEnum eq_mode);
static BOOL js_strict_eq(JSContext *ctx, JSValue op1, JSValue op2);
static BOOL js_same_value(JSContext *ctx, JSValueConst op1, JSValueConst op2);
static BOOL js_same_value_zero(JSContext *ctx, JSValueConst op1, JSValueConst op2);
static JSValue JS_ToObject(JSContext *ctx, JSValueConst val);
static JSValue JS_ToObjectFree(JSContext *ctx, JSValue val);
static JSProperty *add_property(JSContext *ctx,
                                JSObject *p, JSAtom prop, int prop_flags);
#ifdef CONFIG_BIGNUM
static void js_float_env_finalizer(JSRuntime *rt, JSValue val);
static JSValue JS_NewBigFloat(JSContext *ctx);
static inline bf_t *JS_GetBigFloat(JSValueConst val)
{
    JSBigFloat *p = JS_VALUE_GET_PTR(val);
    return &p->num;
}
static JSValue JS_NewBigDecimal(JSContext *ctx);
static inline bfdec_t *JS_GetBigDecimal(JSValueConst val)
{
    JSBigDecimal *p = JS_VALUE_GET_PTR(val);
    return &p->num;
}
static JSValue JS_NewBigInt(JSContext *ctx);
static inline bf_t *JS_GetBigInt(JSValueConst val)
{
    JSBigFloat *p = JS_VALUE_GET_PTR(val);
    return &p->num;
}
static JSValue JS_CompactBigInt1(JSContext *ctx, JSValue val,
                                 BOOL convert_to_safe_integer);
static JSValue JS_CompactBigInt(JSContext *ctx, JSValue val);
static int JS_ToBigInt64Free(JSContext *ctx, int64_t *pres, JSValue val);
static bf_t *JS_ToBigInt(JSContext *ctx, bf_t *buf, JSValueConst val);
static void JS_FreeBigInt(JSContext *ctx, bf_t *a, bf_t *buf);
static bf_t *JS_ToBigFloat(JSContext *ctx, bf_t *buf, JSValueConst val);
static JSValue JS_ToBigDecimalFree(JSContext *ctx, JSValue val,
                                   BOOL allow_null_or_undefined);
static bfdec_t *JS_ToBigDecimal(JSContext *ctx, JSValueConst val);
#endif
JSValue JS_ThrowOutOfMemory(JSContext *ctx);
static JSValue JS_ThrowTypeErrorRevokedProxy(JSContext *ctx);
static JSValue js_proxy_getPrototypeOf(JSContext *ctx, JSValueConst obj);
static int js_proxy_setPrototypeOf(JSContext *ctx, JSValueConst obj,
                                   JSValueConst proto_val, BOOL throw_flag);
static int js_proxy_isExtensible(JSContext *ctx, JSValueConst obj);
static int js_proxy_preventExtensions(JSContext *ctx, JSValueConst obj);
static int js_proxy_isArray(JSContext *ctx, JSValueConst obj);
static int JS_CreateProperty(JSContext *ctx, JSObject *p,
                             JSAtom prop, JSValueConst val,
                             JSValueConst getter, JSValueConst setter,
                             int flags);
static int js_string_memcmp(const JSString *p1, const JSString *p2, int len);
static void reset_weak_ref(JSRuntime *rt, JSObject *p);
static JSValue js_array_buffer_constructor3(JSContext *ctx,
                                            JSValueConst new_target,
                                            uint64_t len, JSClassID class_id,
                                            uint8_t *buf,
                                            JSFreeArrayBufferDataFunc *free_func,
                                            void *opaque, BOOL alloc_flag);
static JSArrayBuffer *js_get_array_buffer(JSContext *ctx, JSValueConst obj);
static JSValue js_typed_array_constructor(JSContext *ctx,
                                          JSValueConst this_val,
                                          int argc, JSValueConst *argv,
                                          int classid);
static BOOL typed_array_is_detached(JSContext *ctx, JSObject *p);
static uint32_t typed_array_get_length(JSContext *ctx, JSObject *p);
static JSValue JS_ThrowTypeErrorDetachedArrayBuffer(JSContext *ctx);
static JSVarRef *get_var_ref(JSContext *ctx, JSStackFrame *sf, int var_idx,
                             BOOL is_arg);
static JSValue js_generator_function_call(JSContext *ctx, JSValueConst func_obj,
                                          JSValueConst this_obj,
                                          int argc, JSValueConst *argv,
                                          int flags);
static void js_async_function_resolve_finalizer(JSRuntime *rt, JSValue val);
static void js_async_function_resolve_mark(JSRuntime *rt, JSValueConst val,
                                           JS_MarkFunc *mark_func);
static JSValue JS_EvalInternal(JSContext *ctx, JSValueConst this_obj,
                               const char *input, size_t input_len,
                               const char *filename, int flags, int scope_idx);
static void js_free_module_def(JSContext *ctx, JSModuleDef *m);
static void js_mark_module_def(JSRuntime *rt, JSModuleDef *m,
                               JS_MarkFunc *mark_func);
static JSValue js_import_meta(JSContext *ctx);
static JSValue js_dynamic_import(JSContext *ctx, JSValueConst specifier);
static void free_var_ref(JSRuntime *rt, JSVarRef *var_ref);
static JSValue js_new_promise_capability(JSContext *ctx,
                                         JSValue *resolving_funcs,
                                         JSValueConst ctor);
[[nodiscard]] static int perform_promise_then(JSContext *ctx,
                                            JSValueConst promise,
                                            JSValueConst *resolve_reject,
                                            JSValueConst *cap_resolving_funcs);
static JSValue js_promise_resolve(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv, int magic);
static int js_string_compare(JSContext *ctx,
                             const JSString *p1, const JSString *p2);
static JSValue JS_ToNumber(JSContext *ctx, JSValueConst val);
static int JS_SetPropertyValue(JSContext *ctx, JSValueConst this_obj,
                               JSValue prop, JSValue val, int flags);
static int JS_NumberIsInteger(JSContext *ctx, JSValueConst val);
static BOOL JS_NumberIsNegativeOrMinusZero(JSContext *ctx, JSValueConst val);
static JSValue JS_ToNumberFree(JSContext *ctx, JSValue val);
static int JS_GetOwnPropertyInternal(JSContext *ctx, JSPropertyDescriptor *desc,
                                     JSObject *p, JSAtom prop);
static void js_free_desc(JSContext *ctx, JSPropertyDescriptor *desc);
static void async_func_mark(JSRuntime *rt, JSAsyncFunctionState *s,
                            JS_MarkFunc *mark_func);
static void JS_AddIntrinsicBasicObjects(JSContext *ctx);
static void js_free_shape(JSRuntime *rt, JSShape *sh);
static void js_free_shape_null(JSRuntime *rt, JSShape *sh);
static int js_shape_prepare_update(JSContext *ctx, JSObject *p,
                                   JSShapeProperty **pprs);
static int init_shape_hash(JSRuntime *rt);
[[nodiscard]] static int js_get_length32(JSContext *ctx, uint32_t *pres,
                                       JSValueConst obj);
[[nodiscard]] static int js_get_length64(JSContext *ctx, int64_t *pres,
                                       JSValueConst obj);
static void free_arg_list(JSContext *ctx, JSValue *tab, uint32_t len);
static JSValue *build_arg_list(JSContext *ctx, uint32_t *plen,
                               JSValueConst array_arg);
static BOOL js_get_fast_array(JSContext *ctx, JSValueConst obj,
                              JSValue **arrpp, uint32_t *countp);
static JSValue JS_CreateAsyncFromSyncIterator(JSContext *ctx,
                                              JSValueConst sync_iter);
static void js_c_function_data_finalizer(JSRuntime *rt, JSValue val);
static void js_c_function_data_mark(JSRuntime *rt, JSValueConst val,
                                    JS_MarkFunc *mark_func);
static JSValue js_c_function_data_call(JSContext *ctx, JSValueConst func_obj,
                                       JSValueConst this_val,
                                       int argc, JSValueConst *argv, int flags);
static JSAtom js_symbol_to_atom(JSContext *ctx, JSValue val);
static void add_gc_object(JSRuntime *rt, JSGCObjectHeader *h,
                          JSGCObjectTypeEnum type);
static void remove_gc_object(JSGCObjectHeader *h);
static void js_async_function_free0(JSRuntime *rt, JSAsyncFunctionData *s);
static JSValue js_instantiate_prototype(JSContext *ctx, JSObject *p, JSAtom atom, void *opaque);
static JSValue js_module_ns_autoinit(JSContext *ctx, JSObject *p, JSAtom atom,
                                 void *opaque);
static JSValue JS_InstantiateFunctionListItem2(JSContext *ctx, JSObject *p,
                                               JSAtom atom, void *opaque);
void JS_SetUncatchableError(JSContext *ctx, JSValueConst val, BOOL flag);

extern const JSClassExoticMethods js_arguments_exotic_methods;
extern const JSClassExoticMethods js_string_exotic_methods;
extern const JSClassExoticMethods js_module_ns_exotic_methods;
static JSClassID js_class_id_alloc = JS_CLASS_INIT_COUNT;

static void js_trigger_gc(JSRuntime *rt, size_t size)
{
    BOOL force_gc;
#ifdef FORCE_GC_AT_MALLOC
    force_gc = TRUE;
#else
    force_gc = ((rt->malloc_state.malloc_size + size) >
                rt->malloc_gc_threshold);
#endif
    if (force_gc) {
#ifdef DUMP_GC
        printf("GC: size=%" PRIu64 "\n",
               (uint64_t)rt->malloc_state.malloc_size);
#endif
        JS_RunGC(rt);
        rt->malloc_gc_threshold = rt->malloc_state.malloc_size +
            (rt->malloc_state.malloc_size >> 1);
    }
}

static size_t js_malloc_usable_size_unknown(const void *ptr)
{
    return 0;
}

inline void *js_malloc_rt(JSRuntime *rt, size_t size)
{
    return rt->mf.js_malloc(&rt->malloc_state, size);
}

inline void js_free_rt(JSRuntime *rt, void *ptr)
{
    rt->mf.js_free(&rt->malloc_state, ptr);
}

inline void *js_realloc_rt(void *rt, void *ptr, size_t size)
{
    return ((JSRuntime*) rt)->mf.js_realloc(&((JSRuntime*) rt)->malloc_state, ptr, size);
}

inline size_t js_malloc_usable_size_rt(JSRuntime *rt, const void *ptr)
{
    return rt->mf.js_malloc_usable_size(ptr);
}

inline void *js_mallocz_rt(JSRuntime *rt, size_t size)
{
    void *ptr;
    ptr = js_malloc_rt(rt, size);
    if (!ptr)
        return NULL;
    return memset(ptr, 0, size);
}

#ifdef CONFIG_BIGNUM
/* called by libbf */
static void *js_bf_realloc(void *opaque, void *ptr, size_t size)
{
    JSRuntime *rt = opaque;
    return js_realloc_rt(rt, ptr, size);
}
#endif /* CONFIG_BIGNUM */

/* Throw out of memory in case of error */
inline void *js_malloc(JSContext *ctx, size_t size)
{
    void *ptr;
    ptr = js_malloc_rt(ctx->rt, size);
    if (js_unlikely(!ptr)) {
        JS_ThrowOutOfMemory(ctx);
        return NULL;
    }
    return ptr;
}

/* Throw out of memory in case of error */
inline void *js_mallocz(JSContext *ctx, size_t size)
{
    void *ptr;
    ptr = js_mallocz_rt(ctx->rt, size);
    if (js_unlikely(!ptr)) {
        JS_ThrowOutOfMemory(ctx);
        return NULL;
    }
    return ptr;
}

inline void js_free(JSContext *ctx, void *ptr)
{
    js_free_rt(ctx->rt, ptr);
}

/* Throw out of memory in case of error */
inline void *js_realloc(JSContext *ctx, void *ptr, size_t size)
{
    void *ret;
    ret = js_realloc_rt(ctx->rt, ptr, size);
    if (js_unlikely(!ret && size != 0)) {
        JS_ThrowOutOfMemory(ctx);
        return NULL;
    }
    return ret;
}

/* store extra allocated size in *pslack if successful */
inline void *js_realloc2(JSContext *ctx, void *ptr, size_t size, size_t *pslack)
{
    void *ret;
    ret = js_realloc_rt(ctx->rt, ptr, size);
    if (js_unlikely(!ret && size != 0)) {
        JS_ThrowOutOfMemory(ctx);
        return NULL;
    }
    if (pslack) {
        size_t new_size = js_malloc_usable_size_rt(ctx->rt, ret);
        *pslack = (new_size > size) ? new_size - size : 0;
    }
    return ret;
}

inline size_t js_malloc_usable_size(JSContext *ctx, const void *ptr)
{
    return js_malloc_usable_size_rt(ctx->rt, ptr);
}

/* Throw out of memory exception in case of error */
inline char *js_strndup(JSContext *ctx, const char *s, size_t n)
{
    auto ptr = (char*) js_malloc(ctx, n + 1);

    if (ptr) {
        memcpy(ptr, s, n);
        ptr[n] = '\0';
    }
    return ptr;
}

inline char *js_strdup(JSContext *ctx, const char *str)
{
    return js_strndup(ctx, str, strlen(str));
}

static no_inline int js_realloc_array(JSContext *ctx, void **parray,
                                      int elem_size, int *psize, int req_size)
{
    int new_size;
    size_t slack;
    void *new_array;
    /* XXX: potential arithmetic overflow */
    new_size = max_int(req_size, *psize * 3 / 2);
    new_array = js_realloc2(ctx, *parray, new_size * elem_size, &slack);
    if (!new_array)
        return -1;
    new_size += slack / elem_size;
    *psize = new_size;
    *parray = new_array;
    return 0;
}

/* resize the array and update its size if req_size > *psize */
static inline int js_resize_array(JSContext *ctx, void **parray, int elem_size,
                                  int *psize, int req_size)
{
    if (js_unlikely(req_size > *psize))
        return js_realloc_array(ctx, parray, elem_size, psize, req_size);
    else
        return 0;
}

static inline void js_dbuf_init(JSContext *ctx, DynBuf *s)
{
    dbuf_init2(s, ctx->rt, (DynBufReallocFunc *)js_realloc_rt);
}

// static inline int is_digit(int c) {
//     return c >= '0' && c <= '9';
// }

typedef struct JSClassShortDef {
    JSAtom class_name;
    JSClassFinalizer *finalizer;
    JSClassGCMark *gc_mark;
} JSClassShortDef;

static JSClassShortDef const js_std_class_def[] = {
    { JS_ATOM_Object, NULL, NULL },                             /* JS_CLASS_OBJECT */
    { JS_ATOM_Array, js_array_finalizer, js_array_mark },       /* JS_CLASS_ARRAY */
    { JS_ATOM_Error, NULL, NULL }, /* JS_CLASS_ERROR */
    { JS_ATOM_Number, js_object_data_finalizer, js_object_data_mark }, /* JS_CLASS_NUMBER */
    { JS_ATOM_String, js_object_data_finalizer, js_object_data_mark }, /* JS_CLASS_STRING */
    { JS_ATOM_Boolean, js_object_data_finalizer, js_object_data_mark }, /* JS_CLASS_BOOLEAN */
    { JS_ATOM_Symbol, js_object_data_finalizer, js_object_data_mark }, /* JS_CLASS_SYMBOL */
    { JS_ATOM_Arguments, js_array_finalizer, js_array_mark },   /* JS_CLASS_ARGUMENTS */
    { JS_ATOM_Arguments, NULL, NULL },                          /* JS_CLASS_MAPPED_ARGUMENTS */
    { JS_ATOM_Date, js_object_data_finalizer, js_object_data_mark }, /* JS_CLASS_DATE */
    { JS_ATOM_Object, NULL, NULL },                             /* JS_CLASS_MODULE_NS */
    { JS_ATOM_Function, js_c_function_finalizer, js_c_function_mark }, /* JS_CLASS_C_FUNCTION */
    { JS_ATOM_Function, js_bytecode_function_finalizer, js_bytecode_function_mark }, /* JS_CLASS_BYTECODE_FUNCTION */
    { JS_ATOM_Function, js_bound_function_finalizer, js_bound_function_mark }, /* JS_CLASS_BOUND_FUNCTION */
    { JS_ATOM_Function, js_c_function_data_finalizer, js_c_function_data_mark }, /* JS_CLASS_C_FUNCTION_DATA */
    { JS_ATOM_GeneratorFunction, js_bytecode_function_finalizer, js_bytecode_function_mark },  /* JS_CLASS_GENERATOR_FUNCTION */
    { JS_ATOM_ForInIterator, js_for_in_iterator_finalizer, js_for_in_iterator_mark },      /* JS_CLASS_FOR_IN_ITERATOR */
    { JS_ATOM_RegExp, js_regexp_finalizer, NULL },                              /* JS_CLASS_REGEXP */
    { JS_ATOM_ArrayBuffer, js_array_buffer_finalizer, NULL },                   /* JS_CLASS_ARRAY_BUFFER */
    { JS_ATOM_SharedArrayBuffer, js_array_buffer_finalizer, NULL },             /* JS_CLASS_SHARED_ARRAY_BUFFER */
    { JS_ATOM_Uint8ClampedArray, js_typed_array_finalizer, js_typed_array_mark }, /* JS_CLASS_UINT8C_ARRAY */
    { JS_ATOM_Int8Array, js_typed_array_finalizer, js_typed_array_mark },       /* JS_CLASS_INT8_ARRAY */
    { JS_ATOM_Uint8Array, js_typed_array_finalizer, js_typed_array_mark },      /* JS_CLASS_UINT8_ARRAY */
    { JS_ATOM_Int16Array, js_typed_array_finalizer, js_typed_array_mark },      /* JS_CLASS_INT16_ARRAY */
    { JS_ATOM_Uint16Array, js_typed_array_finalizer, js_typed_array_mark },     /* JS_CLASS_UINT16_ARRAY */
    { JS_ATOM_Int32Array, js_typed_array_finalizer, js_typed_array_mark },      /* JS_CLASS_INT32_ARRAY */
    { JS_ATOM_Uint32Array, js_typed_array_finalizer, js_typed_array_mark },     /* JS_CLASS_UINT32_ARRAY */
#ifdef CONFIG_BIGNUM
    { JS_ATOM_BigInt64Array, js_typed_array_finalizer, js_typed_array_mark },   /* JS_CLASS_BIG_INT64_ARRAY */
    { JS_ATOM_BigUint64Array, js_typed_array_finalizer, js_typed_array_mark },  /* JS_CLASS_BIG_UINT64_ARRAY */
#endif
    { JS_ATOM_Float32Array, js_typed_array_finalizer, js_typed_array_mark },    /* JS_CLASS_FLOAT32_ARRAY */
    { JS_ATOM_Float64Array, js_typed_array_finalizer, js_typed_array_mark },    /* JS_CLASS_FLOAT64_ARRAY */
    { JS_ATOM_DataView, js_typed_array_finalizer, js_typed_array_mark },        /* JS_CLASS_DATAVIEW */
#ifdef CONFIG_BIGNUM
    { JS_ATOM_BigInt, js_object_data_finalizer, js_object_data_mark },      /* JS_CLASS_BIG_INT */
    { JS_ATOM_BigFloat, js_object_data_finalizer, js_object_data_mark },    /* JS_CLASS_BIG_FLOAT */
    { JS_ATOM_BigFloatEnv, js_float_env_finalizer, NULL },      /* JS_CLASS_FLOAT_ENV */
    { JS_ATOM_BigDecimal, js_object_data_finalizer, js_object_data_mark },    /* JS_CLASS_BIG_DECIMAL */
    { JS_ATOM_OperatorSet, js_operator_set_finalizer, js_operator_set_mark },    /* JS_CLASS_OPERATOR_SET */
#endif
    { JS_ATOM_Map, js_map_finalizer, js_map_mark },             /* JS_CLASS_MAP */
    { JS_ATOM_Set, js_map_finalizer, js_map_mark },             /* JS_CLASS_SET */
    { JS_ATOM_WeakMap, js_map_finalizer, js_map_mark },         /* JS_CLASS_WEAKMAP */
    { JS_ATOM_WeakSet, js_map_finalizer, js_map_mark },         /* JS_CLASS_WEAKSET */
    { JS_ATOM_Map_Iterator, js_map_iterator_finalizer, js_map_iterator_mark }, /* JS_CLASS_MAP_ITERATOR */
    { JS_ATOM_Set_Iterator, js_map_iterator_finalizer, js_map_iterator_mark }, /* JS_CLASS_SET_ITERATOR */
    { JS_ATOM_Array_Iterator, js_array_iterator_finalizer, js_array_iterator_mark }, /* JS_CLASS_ARRAY_ITERATOR */
    { JS_ATOM_String_Iterator, js_array_iterator_finalizer, js_array_iterator_mark }, /* JS_CLASS_STRING_ITERATOR */
    { JS_ATOM_RegExp_String_Iterator, js_regexp_string_iterator_finalizer, js_regexp_string_iterator_mark }, /* JS_CLASS_REGEXP_STRING_ITERATOR */
    { JS_ATOM_Generator, js_generator_finalizer, js_generator_mark }, /* JS_CLASS_GENERATOR */
};

static int init_class_range(JSRuntime *rt, JSClassShortDef const *tab,
                            int start, int count)
{
    JSClassDef cm_s, *cm = &cm_s;
    int i, class_id;

    for(i = 0; i < count; i++) {
        class_id = i + start;
        memset(cm, 0, sizeof(*cm));
        cm->finalizer = tab[i].finalizer;
        cm->gc_mark = tab[i].gc_mark;
        if (JS_NewClass1(rt, class_id, cm, tab[i].class_name) < 0)
            return -1;
    }
    return 0;
}

#ifdef CONFIG_BIGNUM
static JSValue JS_ThrowUnsupportedOperation(JSContext *ctx)
{
    return JS_ThrowTypeError(ctx, "unsupported operation");
}

static JSValue invalid_to_string(JSContext *ctx, JSValueConst val)
{
    return JS_ThrowUnsupportedOperation(ctx);
}

static JSValue invalid_from_string(JSContext *ctx, const char *buf,
                                   int radix, int flags, slimb_t *pexponent)
{
    return JS_NAN;
}

static int invalid_unary_arith(JSContext *ctx,
                               JSValue *pres, OPCodeEnum op, JSValue op1)
{
    JS_FreeValue(ctx, op1);
    JS_ThrowUnsupportedOperation(ctx);
    return -1;
}

static int invalid_binary_arith(JSContext *ctx, OPCodeEnum op,
                                JSValue *pres, JSValue op1, JSValue op2)
{
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    JS_ThrowUnsupportedOperation(ctx);
    return -1;
}

static JSValue invalid_mul_pow10_to_float64(JSContext *ctx, const bf_t *a,
                                            int64_t exponent)
{
    return JS_ThrowUnsupportedOperation(ctx);
}

static int invalid_mul_pow10(JSContext *ctx, JSValue *sp)
{
    JS_ThrowUnsupportedOperation(ctx);
    return -1;
}

static void set_dummy_numeric_ops(JSNumericOperations *ops)
{
    ops->to_string = invalid_to_string;
    ops->from_string = invalid_from_string;
    ops->unary_arith = invalid_unary_arith;
    ops->binary_arith = invalid_binary_arith;
    ops->mul_pow10_to_float64 = invalid_mul_pow10_to_float64;
    ops->mul_pow10 = invalid_mul_pow10;
}

#endif /* CONFIG_BIGNUM */

#if !defined(CONFIG_STACK_CHECK)
/* no stack limitation */
static inline uintptr_t js_get_stack_pointer(void)
{
    return 0;
}

static inline BOOL js_check_stack_overflow(JSRuntime *rt, size_t alloca_size)
{
    return FALSE;
}
#else
/* Note: OS and CPU dependent */
static inline uintptr_t js_get_stack_pointer(void)
{
    return (uintptr_t)__builtin_frame_address(0);
}

static inline BOOL js_check_stack_overflow(JSRuntime *rt, size_t alloca_size)
{
    uintptr_t sp;
    sp = js_get_stack_pointer() - alloca_size;
    return js_unlikely(sp < rt->stack_limit);
}
#endif

inline JSRuntime *JS_NewRuntime2(const JSMallocFunctions *mf, void *opaque)
{
    JSRuntime *rt;
    JSMallocState ms;

    memset(&ms, 0, sizeof(ms));
    ms.opaque = opaque;
    ms.malloc_limit = -1;

    rt = (JSRuntime*) mf->js_malloc(&ms, sizeof(JSRuntime));
    if (!rt)
        return NULL;
    memset(rt, 0, sizeof(*rt));
    rt->mf = *mf;
    if (!rt->mf.js_malloc_usable_size) {
        /* use dummy function if none provided */
        rt->mf.js_malloc_usable_size = js_malloc_usable_size_unknown;
    }
    rt->malloc_state = ms;
    rt->malloc_gc_threshold = 256 * 1024;

#ifdef CONFIG_BIGNUM
    bf_context_init(&rt->bf_ctx, js_bf_realloc, rt);
    set_dummy_numeric_ops(&rt->bigint_ops);
    set_dummy_numeric_ops(&rt->bigfloat_ops);
    set_dummy_numeric_ops(&rt->bigdecimal_ops);
#endif

    init_list_head(&rt->context_list);
    init_list_head(&rt->gc_obj_list);
    init_list_head(&rt->gc_zero_ref_count_list);
    rt->gc_phase = JS_GC_PHASE_NONE;

#ifdef DUMP_LEAKS
    init_list_head(&rt->string_list);
#endif
    init_list_head(&rt->job_list);

    if (JS_InitAtoms(rt))
        goto fail;

    /* create the object, array and function classes */
    if (init_class_range(rt, js_std_class_def, JS_CLASS_OBJECT,
                         countof(js_std_class_def)) < 0)
        goto fail;
    rt->class_array[JS_CLASS_ARGUMENTS].exotic = &js_arguments_exotic_methods;
    rt->class_array[JS_CLASS_STRING].exotic = &js_string_exotic_methods;
    rt->class_array[JS_CLASS_MODULE_NS].exotic = &js_module_ns_exotic_methods;

    rt->class_array[JS_CLASS_C_FUNCTION].call = js_call_c_function;
    rt->class_array[JS_CLASS_C_FUNCTION_DATA].call = js_c_function_data_call;
    rt->class_array[JS_CLASS_BOUND_FUNCTION].call = js_call_bound_function;
    rt->class_array[JS_CLASS_GENERATOR_FUNCTION].call = js_generator_function_call;
    if (init_shape_hash(rt))
        goto fail;

    rt->stack_size = JS_DEFAULT_STACK_SIZE;
    JS_UpdateStackTop(rt);

    rt->current_exception = JS_NULL;

    return rt;
 fail:
    JS_FreeRuntime(rt);
    return NULL;
}

inline void *JS_GetRuntimeOpaque(JSRuntime *rt)
{
    return rt->user_opaque;
}

inline void JS_SetRuntimeOpaque(JSRuntime *rt, void *opaque)
{
    rt->user_opaque = opaque;
}

/* default memory allocation functions with memory limitation */
static inline size_t js_def_malloc_usable_size(void *ptr)
{
#if defined(__APPLE__)
    return malloc_size(ptr);
#elif defined(_WIN32)
    return _msize(ptr);
#elif defined(EMSCRIPTEN)
    return 0;
#elif defined(__linux__)
    return malloc_usable_size(ptr);
#else
    /* change this to `return 0;` if compilation fails */
    return malloc_usable_size(ptr);
#endif
}

static void *js_def_malloc(JSMallocState *s, size_t size)
{
    void *ptr;

    /* Do not allocate zero bytes: behavior is platform dependent */
    assert(size != 0);

    if (js_unlikely(s->malloc_size + size > s->malloc_limit))
        return NULL;

    ptr = malloc(size);
    if (!ptr)
        return NULL;

    s->malloc_count++;
    s->malloc_size += js_def_malloc_usable_size(ptr) + MALLOC_OVERHEAD;
    return ptr;
}

static void js_def_free(JSMallocState *s, void *ptr)
{
    if (!ptr)
        return;

    s->malloc_count--;
    s->malloc_size -= js_def_malloc_usable_size(ptr) + MALLOC_OVERHEAD;
    free(ptr);
}

static void *js_def_realloc(JSMallocState *s, void *ptr, size_t size)
{
    size_t old_size;

    if (!ptr) {
        if (size == 0)
            return NULL;
        return js_def_malloc(s, size);
    }
    old_size = js_def_malloc_usable_size(ptr);
    if (size == 0) {
        s->malloc_count--;
        s->malloc_size -= old_size + MALLOC_OVERHEAD;
        free(ptr);
        return NULL;
    }
    if (s->malloc_size + size - old_size > s->malloc_limit)
        return NULL;

    ptr = realloc(ptr, size);
    if (!ptr)
        return NULL;

    s->malloc_size += js_def_malloc_usable_size(ptr) - old_size;
    return ptr;
}

static const JSMallocFunctions def_malloc_funcs = {
    js_def_malloc,
    js_def_free,
    js_def_realloc,
#if defined(__APPLE__)
    malloc_size,
#elif defined(_WIN32)
    (size_t (*)(const void *))_msize,
#elif defined(EMSCRIPTEN)
    NULL,
#elif defined(__linux__)
    (size_t (*)(const void *))malloc_usable_size,
#else
    /* change this to `NULL,` if compilation fails */
    malloc_usable_size,
#endif
};

inline JSRuntime *JS_NewRuntime(void)
{
    return JS_NewRuntime2(&def_malloc_funcs, NULL);
}

inline void JS_SetMemoryLimit(JSRuntime *rt, size_t limit)
{
    rt->malloc_state.malloc_limit = limit;
}

/* use -1 to disable automatic GC */
inline void JS_SetGCThreshold(JSRuntime *rt, size_t gc_threshold)
{
    rt->malloc_gc_threshold = gc_threshold;
}

inline void JS_SetInterruptHandler(JSRuntime *rt, JSInterruptHandler *cb, void *opaque)
{
    rt->interrupt_handler = cb;
    rt->interrupt_opaque = opaque;
}

inline void JS_SetCanBlock(JSRuntime *rt, BOOL can_block)
{
    rt->can_block = can_block;
}

inline void JS_SetSharedArrayBufferFunctions(JSRuntime *rt,
                                      const JSSharedArrayBufferFunctions *sf)
{
    rt->sab_funcs = *sf;
}

/* return 0 if OK, < 0 if exception */
inline int JS_EnqueueJob(JSContext *ctx, JSJobFunc *job_func,
                  int argc, JSValueConst *argv)
{
    JSRuntime *rt = ctx->rt;
    JSJobEntry *e;
    int i;

    e = (JSJobEntry*) js_malloc(ctx, sizeof(*e) + argc * sizeof(JSValue));
    if (!e)
        return -1;
    e->ctx = ctx;
    e->job_func = job_func;
    e->argc = argc;
    for(i = 0; i < argc; i++) {
        e->argv[i] = JS_DupValue(ctx, argv[i]);
    }
    list_add_tail(&e->link, &rt->job_list);
    return 0;
}

inline BOOL JS_IsJobPending(JSRuntime *rt)
{
    return !list_empty(&rt->job_list);
}

/* return < 0 if exception, 0 if no job pending, 1 if a job was
   executed successfully. the context of the job is stored in '*pctx' */
inline int JS_ExecutePendingJob(JSRuntime *rt, JSContext **pctx)
{
    JSContext *ctx;
    JSJobEntry *e;
    JSValue res;
    int i, ret;

    if (list_empty(&rt->job_list)) {
        *pctx = NULL;
        return 0;
    }

    /* get the first pending job and execute it */
    e = list_entry(rt->job_list.next, JSJobEntry, link);
    list_del(&e->link);
    ctx = e->ctx;
    res = e->job_func(e->ctx, e->argc, (JSValueConst *)e->argv);
    for(i = 0; i < e->argc; i++)
        JS_FreeValue(ctx, e->argv[i]);
    if (JS_IsException(res))
        ret = -1;
    else
        ret = 1;
    JS_FreeValue(ctx, res);
    js_free(ctx, e);
    *pctx = ctx;
    return ret;
}

static inline uint32_t atom_get_free(const JSAtomStruct *p)
{
    return (uintptr_t)p >> 1;
}

static inline BOOL atom_is_free(const JSAtomStruct *p)
{
    return (uintptr_t)p & 1;
}

static inline JSAtomStruct *atom_set_free(uint32_t v)
{
    return (JSAtomStruct *)(((uintptr_t)v << 1) | 1);
}

/* Note: the string contents are uninitialized */
static JSString *js_alloc_string_rt(JSRuntime *rt, int max_len, int is_wide_char)
{
    auto str = (JSString*) js_malloc_rt(rt, sizeof(JSString) + (max_len << is_wide_char) + 1 - is_wide_char);
    if (js_unlikely(!str))
        return NULL;
    str->header.ref_count = 1;
    str->is_wide_char = is_wide_char;
    str->len = max_len;
    str->atom_type = 0;
    str->hash = 0;          /* optional but costless */
    str->hash_next = 0;     /* optional */
#ifdef DUMP_LEAKS
    list_add_tail(&str->link, &rt->string_list);
#endif
    return str;
}

static JSString *js_alloc_string(JSContext *ctx, int max_len, int is_wide_char)
{
    JSString *p;
    p = js_alloc_string_rt(ctx->rt, max_len, is_wide_char);
    if (js_unlikely(!p)) {
        JS_ThrowOutOfMemory(ctx);
        return NULL;
    }
    return p;
}

/* same as JS_FreeValueRT() but faster */
static inline void js_free_string(JSRuntime *rt, JSString *str)
{
    if (--str->header.ref_count <= 0) {
        if (str->atom_type) {
            JS_FreeAtomStruct(rt, str);
        } else {
#ifdef DUMP_LEAKS
            list_del(&str->link);
#endif
            js_free_rt(rt, str);
        }
    }
}

inline void JS_SetRuntimeInfo(JSRuntime *rt, const char *s)
{
    if (rt)
        rt->rt_info = s;
}

inline void JS_FreeRuntime(JSRuntime *rt)
{
    struct list_head *el, *el1;
    int i;

    JS_FreeValueRT(rt, rt->current_exception);

    list_for_each_safe(el, el1, &rt->job_list) {
        JSJobEntry *e = list_entry(el, JSJobEntry, link);
        for(i = 0; i < e->argc; i++)
            JS_FreeValueRT(rt, e->argv[i]);
        js_free_rt(rt, e);
    }
    init_list_head(&rt->job_list);

    JS_RunGC(rt);

#ifdef DUMP_LEAKS
    /* leaking objects */
    {
        BOOL header_done;
        JSGCObjectHeader *p;
        int count;

        /* remove the internal refcounts to display only the object
           referenced externally */
        list_for_each(el, &rt->gc_obj_list) {
            p = list_entry(el, JSGCObjectHeader, link);
            p->mark = 0;
        }
        gc_decref(rt);

        header_done = FALSE;
        list_for_each(el, &rt->gc_obj_list) {
            p = list_entry(el, JSGCObjectHeader, link);
            if (p->ref_count != 0) {
                if (!header_done) {
                    printf("Object leaks:\n");
                    JS_DumpObjectHeader(rt);
                    header_done = TRUE;
                }
                JS_DumpGCObject(rt, p);
            }
        }

        count = 0;
        list_for_each(el, &rt->gc_obj_list) {
            p = list_entry(el, JSGCObjectHeader, link);
            if (p->ref_count == 0) {
                count++;
            }
        }
        if (count != 0)
            printf("Secondary object leaks: %d\n", count);
    }
#endif
    assert(list_empty(&rt->gc_obj_list));

    /* free the classes */
    for(i = 0; i < rt->class_count; i++) {
        JSClass *cl = &rt->class_array[i];
        if (cl->class_id != 0) {
            JS_FreeAtomRT(rt, cl->class_name);
        }
    }
    js_free_rt(rt, rt->class_array);

#ifdef CONFIG_BIGNUM
    bf_context_end(&rt->bf_ctx);
#endif

#ifdef DUMP_LEAKS
    /* only the atoms defined in JS_InitAtoms() should be left */
    {
        BOOL header_done = FALSE;

        for(i = 0; i < rt->atom_size; i++) {
            JSAtomStruct *p = rt->atom_array[i];
            if (!atom_is_free(p) /* && p->str*/) {
                if (i >= JS_ATOM_END || p->header.ref_count != 1) {
                    if (!header_done) {
                        header_done = TRUE;
                        if (rt->rt_info) {
                            printf("%s:1: atom leakage:", rt->rt_info);
                        } else {
                            printf("Atom leaks:\n"
                                   "    %6s %6s %s\n",
                                   "ID", "REFCNT", "NAME");
                        }
                    }
                    if (rt->rt_info) {
                        printf(" ");
                    } else {
                        printf("    %6u %6u ", i, p->header.ref_count);
                    }
                    switch (p->atom_type) {
                    case JS_ATOM_TYPE_STRING:
                        JS_DumpString(rt, p);
                        break;
                    case JS_ATOM_TYPE_GLOBAL_SYMBOL:
                        printf("Symbol.for(");
                        JS_DumpString(rt, p);
                        printf(")");
                        break;
                    case JS_ATOM_TYPE_SYMBOL:
                        if (p->hash == JS_ATOM_HASH_SYMBOL) {
                            printf("Symbol(");
                            JS_DumpString(rt, p);
                            printf(")");
                        } else {
                            printf("Private(");
                            JS_DumpString(rt, p);
                            printf(")");
                        }
                        break;
                    }
                    if (rt->rt_info) {
                        printf(":%u", p->header.ref_count);
                    } else {
                        printf("\n");
                    }
                }
            }
        }
        if (rt->rt_info && header_done)
            printf("\n");
    }
#endif

    /* free the atoms */
    for(i = 0; i < rt->atom_size; i++) {
        JSAtomStruct *p = rt->atom_array[i];
        if (!atom_is_free(p)) {
#ifdef DUMP_LEAKS
            list_del(&p->link);
#endif
            js_free_rt(rt, p);
        }
    }
    js_free_rt(rt, rt->atom_array);
    js_free_rt(rt, rt->atom_hash);
    js_free_rt(rt, rt->shape_hash);
#ifdef DUMP_LEAKS
    if (!list_empty(&rt->string_list)) {
        if (rt->rt_info) {
            printf("%s:1: string leakage:", rt->rt_info);
        } else {
            printf("String leaks:\n"
                   "    %6s %s\n",
                   "REFCNT", "VALUE");
        }
        list_for_each_safe(el, el1, &rt->string_list) {
            JSString *str = list_entry(el, JSString, link);
            if (rt->rt_info) {
                printf(" ");
            } else {
                printf("    %6u ", str->header.ref_count);
            }
            JS_DumpString(rt, str);
            if (rt->rt_info) {
                printf(":%u", str->header.ref_count);
            } else {
                printf("\n");
            }
            list_del(&str->link);
            js_free_rt(rt, str);
        }
        if (rt->rt_info)
            printf("\n");
    }
    {
        JSMallocState *s = &rt->malloc_state;
        if (s->malloc_count > 1) {
            if (rt->rt_info)
                printf("%s:1: ", rt->rt_info);
            printf("Memory leak: %"PRIu64" bytes lost in %"PRIu64" block%s\n",
                   (uint64_t)(s->malloc_size - sizeof(JSRuntime)),
                   (uint64_t)(s->malloc_count - 1), &"s"[s->malloc_count == 2]);
        }
    }
#endif

    {
        JSMallocState ms = rt->malloc_state;
        rt->mf.js_free(&ms, rt);
    }
}

inline JSContext *JS_NewContextRaw(JSRuntime *rt)
{
    int i;

    auto ctx = (JSContext*) js_mallocz_rt(rt, sizeof(JSContext));
    if (!ctx)
        return NULL;
    ctx->header.ref_count = 1;
    add_gc_object(rt, &ctx->header, JS_GC_OBJ_TYPE_JS_CONTEXT);

    ctx->class_proto = (JSValue*) js_malloc_rt(rt, sizeof(ctx->class_proto[0]) * rt->class_count);
    if (!ctx->class_proto) {
        js_free_rt(rt, ctx);
        return NULL;
    }
    ctx->rt = rt;
    list_add_tail(&ctx->link, &rt->context_list);
#ifdef CONFIG_BIGNUM
    ctx->bf_ctx = &rt->bf_ctx;
    ctx->fp_env.prec = 113;
    ctx->fp_env.flags = bf_set_exp_bits(15) | BF_RNDN | BF_FLAG_SUBNORMAL;
#endif
    for(i = 0; i < rt->class_count; i++)
        ctx->class_proto[i] = JS_NULL;
    ctx->array_ctor = JS_NULL;
    ctx->regexp_ctor = JS_NULL;
    ctx->promise_ctor = JS_NULL;
    init_list_head(&ctx->loaded_modules);

    JS_AddIntrinsicBasicObjects(ctx);
    return ctx;
}

inline JSContext *JS_NewContext(JSRuntime *rt)
{
    JSContext *ctx;

    ctx = JS_NewContextRaw(rt);
    if (!ctx)
        return NULL;

    JS_AddIntrinsicBaseObjects(ctx);
    JS_AddIntrinsicDate(ctx);
    JS_AddIntrinsicEval(ctx);
    JS_AddIntrinsicStringNormalize(ctx);
    JS_AddIntrinsicRegExp(ctx);
    JS_AddIntrinsicJSON(ctx);
    JS_AddIntrinsicProxy(ctx);
    JS_AddIntrinsicMapSet(ctx);
    JS_AddIntrinsicTypedArrays(ctx);
    JS_AddIntrinsicPromise(ctx);
#ifdef CONFIG_BIGNUM
    JS_AddIntrinsicBigInt(ctx);
#endif
    return ctx;
}

inline void *JS_GetContextOpaque(JSContext *ctx)
{
    return ctx->user_opaque;
}

inline void JS_SetContextOpaque(JSContext *ctx, void *opaque)
{
    ctx->user_opaque = opaque;
}

/* set the new value and free the old value after (freeing the value
   can reallocate the object data) */
static inline void set_value(JSContext *ctx, JSValue *pval, JSValue new_val)
{
    JSValue old_val;
    old_val = *pval;
    *pval = new_val;
    JS_FreeValue(ctx, old_val);
}

inline void JS_SetClassProto(JSContext *ctx, JSClassID class_id, JSValue obj)
{
    JSRuntime *rt = ctx->rt;
    assert(class_id < rt->class_count);
    set_value(ctx, &ctx->class_proto[class_id], obj);
}

inline JSValue JS_GetClassProto(JSContext *ctx, JSClassID class_id)
{
    JSRuntime *rt = ctx->rt;
    assert(class_id < rt->class_count);
    return JS_DupValue(ctx, ctx->class_proto[class_id]);
}

typedef enum JSFreeModuleEnum {
    JS_FREE_MODULE_ALL,
    JS_FREE_MODULE_NOT_RESOLVED,
    JS_FREE_MODULE_NOT_EVALUATED,
} JSFreeModuleEnum;

/* XXX: would be more efficient with separate module lists */
static void js_free_modules(JSContext *ctx, JSFreeModuleEnum flag)
{
    struct list_head *el, *el1;
    list_for_each_safe(el, el1, &ctx->loaded_modules) {
        JSModuleDef *m = list_entry(el, JSModuleDef, link);
        if (flag == JS_FREE_MODULE_ALL ||
            (flag == JS_FREE_MODULE_NOT_RESOLVED && !m->resolved) ||
            (flag == JS_FREE_MODULE_NOT_EVALUATED && !m->evaluated)) {
            js_free_module_def(ctx, m);
        }
    }
}

inline JSContext *JS_DupContext(JSContext *ctx)
{
    ctx->header.ref_count++;
    return ctx;
}

/* used by the GC */
static void JS_MarkContext(JSRuntime *rt, JSContext *ctx,
                           JS_MarkFunc *mark_func)
{
    int i;
    struct list_head *el;

    /* modules are not seen by the GC, so we directly mark the objects
       referenced by each module */
    list_for_each(el, &ctx->loaded_modules) {
        JSModuleDef *m = list_entry(el, JSModuleDef, link);
        js_mark_module_def(rt, m, mark_func);
    }

    JS_MarkValue(rt, ctx->global_obj, mark_func);
    JS_MarkValue(rt, ctx->global_var_obj, mark_func);

    JS_MarkValue(rt, ctx->throw_type_error, mark_func);
    JS_MarkValue(rt, ctx->eval_obj, mark_func);

    JS_MarkValue(rt, ctx->array_proto_values, mark_func);
    for(i = 0; i < JS_NATIVE_ERROR_COUNT; i++) {
        JS_MarkValue(rt, ctx->native_error_proto[i], mark_func);
    }
    for(i = 0; i < rt->class_count; i++) {
        JS_MarkValue(rt, ctx->class_proto[i], mark_func);
    }
    JS_MarkValue(rt, ctx->iterator_proto, mark_func);
    JS_MarkValue(rt, ctx->async_iterator_proto, mark_func);
    JS_MarkValue(rt, ctx->promise_ctor, mark_func);
    JS_MarkValue(rt, ctx->array_ctor, mark_func);
    JS_MarkValue(rt, ctx->regexp_ctor, mark_func);
    JS_MarkValue(rt, ctx->function_ctor, mark_func);
    JS_MarkValue(rt, ctx->function_proto, mark_func);

    if (ctx->array_shape)
        mark_func(rt, &ctx->array_shape->header);
}

inline void JS_FreeContext(JSContext *ctx)
{
    JSRuntime *rt = ctx->rt;
    int i;

    if (--ctx->header.ref_count > 0)
        return;
    assert(ctx->header.ref_count == 0);

#ifdef DUMP_ATOMS
    JS_DumpAtoms(ctx->rt);
#endif
#ifdef DUMP_SHAPES
    JS_DumpShapes(ctx->rt);
#endif
#ifdef DUMP_OBJECTS
    {
        struct list_head *el;
        JSGCObjectHeader *p;
        printf("JSObjects: {\n");
        JS_DumpObjectHeader(ctx->rt);
        list_for_each(el, &rt->gc_obj_list) {
            p = list_entry(el, JSGCObjectHeader, link);
            JS_DumpGCObject(rt, p);
        }
        printf("}\n");
    }
#endif
#ifdef DUMP_MEM
    {
        JSMemoryUsage stats;
        JS_ComputeMemoryUsage(rt, &stats);
        JS_DumpMemoryUsage(stdout, &stats, rt);
    }
#endif

    js_free_modules(ctx, JS_FREE_MODULE_ALL);

    JS_FreeValue(ctx, ctx->global_obj);
    JS_FreeValue(ctx, ctx->global_var_obj);

    JS_FreeValue(ctx, ctx->throw_type_error);
    JS_FreeValue(ctx, ctx->eval_obj);

    JS_FreeValue(ctx, ctx->array_proto_values);
    for(i = 0; i < JS_NATIVE_ERROR_COUNT; i++) {
        JS_FreeValue(ctx, ctx->native_error_proto[i]);
    }
    for(i = 0; i < rt->class_count; i++) {
        JS_FreeValue(ctx, ctx->class_proto[i]);
    }
    js_free_rt(rt, ctx->class_proto);
    JS_FreeValue(ctx, ctx->iterator_proto);
    JS_FreeValue(ctx, ctx->async_iterator_proto);
    JS_FreeValue(ctx, ctx->promise_ctor);
    JS_FreeValue(ctx, ctx->array_ctor);
    JS_FreeValue(ctx, ctx->regexp_ctor);
    JS_FreeValue(ctx, ctx->function_ctor);
    JS_FreeValue(ctx, ctx->function_proto);

    js_free_shape_null(ctx->rt, ctx->array_shape);

    list_del(&ctx->link);
    remove_gc_object(&ctx->header);
    js_free_rt(ctx->rt, ctx);
}

inline JSRuntime *JS_GetRuntime(JSContext *ctx)
{
    return ctx->rt;
}

static void update_stack_limit(JSRuntime *rt)
{
    if (rt->stack_size == 0) {
        rt->stack_limit = 0; /* no limit */
    } else {
        rt->stack_limit = rt->stack_top - rt->stack_size;
    }
}

inline void JS_SetMaxStackSize(JSRuntime *rt, size_t stack_size)
{
    rt->stack_size = stack_size;
    update_stack_limit(rt);
}

inline void JS_UpdateStackTop(JSRuntime *rt)
{
    rt->stack_top = js_get_stack_pointer();
    update_stack_limit(rt);
}

static inline BOOL is_strict_mode(JSContext *ctx)
{
    JSStackFrame *sf = ctx->rt->current_stack_frame;
    return (sf && (sf->js_mode & JS_MODE_STRICT));
}

#ifdef CONFIG_BIGNUM
static inline BOOL is_math_mode(JSContext *ctx)
{
    JSStackFrame *sf = ctx->rt->current_stack_frame;
    return (sf && (sf->js_mode & JS_MODE_MATH));
}
#endif

/* JSAtom support */

#define JS_ATOM_TAG_INT (1U << 31)
#define JS_ATOM_MAX_INT (JS_ATOM_TAG_INT - 1)
#define JS_ATOM_MAX     ((1U << 30) - 1)

/* return the max count from the hash size */
#define JS_ATOM_COUNT_RESIZE(n) ((n) * 2)

static inline BOOL __JS_AtomIsConst(JSAtom v)
{
#if defined(DUMP_LEAKS) && DUMP_LEAKS > 1
        return (int32_t)v <= 0;
#else
        return (int32_t)v < JS_ATOM_END;
#endif
}

static inline BOOL __JS_AtomIsTaggedInt(JSAtom v)
{
    return (v & JS_ATOM_TAG_INT) != 0;
}

static inline JSAtom __JS_AtomFromUInt32(uint32_t v)
{
    return v | JS_ATOM_TAG_INT;
}

static inline uint32_t __JS_AtomToUInt32(JSAtom atom)
{
    return atom & ~JS_ATOM_TAG_INT;
}

static inline int is_num(int c)
{
    return c >= '0' && c <= '9';
}

/* return TRUE if the string is a number n with 0 <= n <= 2^32-1 */
static inline BOOL is_num_string(uint32_t *pval, const JSString *p)
{
    uint32_t n;
    uint64_t n64;
    int c, i, len;

    len = p->len;
    if (len == 0 || len > 10)
        return FALSE;
    if (p->is_wide_char)
        c = p->u.str16[0];
    else
        c = p->u.str8[0];
    if (is_num(c)) {
        if (c == '0') {
            if (len != 1)
                return FALSE;
            n = 0;
        } else {
            n = c - '0';
            for(i = 1; i < len; i++) {
                if (p->is_wide_char)
                    c = p->u.str16[i];
                else
                    c = p->u.str8[i];
                if (!is_num(c))
                    return FALSE;
                n64 = (uint64_t)n * 10 + (c - '0');
                if ((n64 >> 32) != 0)
                    return FALSE;
                n = n64;
            }
        }
        *pval = n;
        return TRUE;
    } else {
        return FALSE;
    }
}

/* XXX: could use faster version ? */
static inline uint32_t hash_string8(const uint8_t *str, size_t len, uint32_t h)
{
    size_t i;

    for(i = 0; i < len; i++)
        h = h * 263 + str[i];
    return h;
}

static inline uint32_t hash_string16(const uint16_t *str,
                                     size_t len, uint32_t h)
{
    size_t i;

    for(i = 0; i < len; i++)
        h = h * 263 + str[i];
    return h;
}

static uint32_t hash_string(const JSString *str, uint32_t h)
{
    if (str->is_wide_char)
        h = hash_string16(str->u.str16, str->len, h);
    else
        h = hash_string8(str->u.str8, str->len, h);
    return h;
}

inline void JS_DumpString(JSRuntime *rt, const JSString *p)
{
    int i, c, sep;

    if (p == NULL) {
        printf("<null>");
        return;
    }
    printf("%d", p->header.ref_count);
    sep = (p->header.ref_count == 1) ? '\"' : '\'';
    putchar(sep);
    for(i = 0; i < p->len; i++) {
        if (p->is_wide_char)
            c = p->u.str16[i];
        else
            c = p->u.str8[i];
        if (c == sep || c == '\\') {
            putchar('\\');
            putchar(c);
        } else if (c >= ' ' && c <= 126) {
            putchar(c);
        } else if (c == '\n') {
            putchar('\\');
            putchar('n');
        } else {
            printf("\\u%04x", c);
        }
    }
    putchar(sep);
}

inline void JS_DumpAtoms(JSRuntime *rt)
{
    JSAtomStruct *p;
    int h, i;
    /* This only dumps hashed atoms, not JS_ATOM_TYPE_SYMBOL atoms */
    printf("JSAtom count=%d size=%d hash_size=%d:\n",
           rt->atom_count, rt->atom_size, rt->atom_hash_size);
    printf("JSAtom hash table: {\n");
    for(i = 0; i < rt->atom_hash_size; i++) {
        h = rt->atom_hash[i];
        if (h) {
            printf("  %d:", i);
            while (h) {
                p = rt->atom_array[h];
                printf(" ");
                JS_DumpString(rt, p);
                h = p->hash_next;
            }
            printf("\n");
        }
    }
    printf("}\n");
    printf("JSAtom table: {\n");
    for(i = 0; i < rt->atom_size; i++) {
        p = rt->atom_array[i];
        if (!atom_is_free(p)) {
            printf("  %d: { %d %08x ", i, p->atom_type, p->hash);
            if (!(p->len == 0 && p->is_wide_char != 0))
                JS_DumpString(rt, p);
            printf(" %d }\n", p->hash_next);
        }
    }
    printf("}\n");
}

static int JS_ResizeAtomHash(JSRuntime *rt, int new_hash_size)
{
    JSAtomStruct *p;
    uint32_t new_hash_mask, h, i, hash_next1, j, *new_hash;

    assert((new_hash_size & (new_hash_size - 1)) == 0); /* power of two */
    new_hash_mask = new_hash_size - 1;
    new_hash = (uint32_t*) js_mallocz_rt(rt, sizeof(rt->atom_hash[0]) * new_hash_size);
    if (!new_hash)
        return -1;
    for(i = 0; i < rt->atom_hash_size; i++) {
        h = rt->atom_hash[i];
        while (h != 0) {
            p = rt->atom_array[h];
            hash_next1 = p->hash_next;
            /* add in new hash table */
            j = p->hash & new_hash_mask;
            p->hash_next = new_hash[j];
            new_hash[j] = h;
            h = hash_next1;
        }
    }
    js_free_rt(rt, rt->atom_hash);
    rt->atom_hash = new_hash;
    rt->atom_hash_size = new_hash_size;
    rt->atom_count_resize = JS_ATOM_COUNT_RESIZE(new_hash_size);
    //    JS_DumpAtoms(rt);
    return 0;
}

static int JS_InitAtoms(JSRuntime *rt)
{
    int i, len, atom_type;
    const char *p;

    rt->atom_hash_size = 0;
    rt->atom_hash = NULL;
    rt->atom_count = 0;
    rt->atom_size = 0;
    rt->atom_free_index = 0;
    if (JS_ResizeAtomHash(rt, 256))     /* there are at least 195 predefined atoms */
        return -1;

    p = js_atom_init;
    for(i = 1; i < JS_ATOM_END; i++) {
        if (i == JS_ATOM_Private_brand)
            atom_type = JS_ATOM_TYPE_PRIVATE;
        else if (i >= JS_ATOM_Symbol_toPrimitive)
            atom_type = JS_ATOM_TYPE_SYMBOL;
        else
            atom_type = JS_ATOM_TYPE_STRING;
        len = strlen(p);
        if (__JS_NewAtomInit(rt, p, len, atom_type) == JS_ATOM_NULL)
            return -1;
        p = p + len + 1;
    }
    return 0;
}

static JSAtom JS_DupAtomRT(JSRuntime *rt, JSAtom v)
{
    JSAtomStruct *p;

    if (!__JS_AtomIsConst(v)) {
        p = rt->atom_array[v];
        p->header.ref_count++;
    }
    return v;
}

inline JSAtom JS_DupAtom(JSContext *ctx, JSAtom v)
{
    JSRuntime *rt;
    JSAtomStruct *p;

    if (!__JS_AtomIsConst(v)) {
        rt = ctx->rt;
        p = rt->atom_array[v];
        p->header.ref_count++;
    }
    return v;
}

static JSAtomKindEnum JS_AtomGetKind(JSContext *ctx, JSAtom v)
{
    JSRuntime *rt;
    JSAtomStruct *p;

    rt = ctx->rt;
    if (__JS_AtomIsTaggedInt(v))
        return JS_ATOM_KIND_STRING;
    p = rt->atom_array[v];
    switch(p->atom_type) {
    case JS_ATOM_TYPE_STRING:
        return JS_ATOM_KIND_STRING;
    case JS_ATOM_TYPE_GLOBAL_SYMBOL:
        return JS_ATOM_KIND_SYMBOL;
    case JS_ATOM_TYPE_SYMBOL:
        switch(p->hash) {
        case JS_ATOM_HASH_SYMBOL:
            return JS_ATOM_KIND_SYMBOL;
        case JS_ATOM_HASH_PRIVATE:
            return JS_ATOM_KIND_PRIVATE;
        default:
            abort();
        }
    default:
        abort();
    }
}

static BOOL JS_AtomIsString(JSContext *ctx, JSAtom v)
{
    return JS_AtomGetKind(ctx, v) == JS_ATOM_KIND_STRING;
}

static JSAtom js_get_atom_index(JSRuntime *rt, JSAtomStruct *p)
{
    uint32_t i = p->hash_next;  /* atom_index */
    if (p->atom_type != JS_ATOM_TYPE_SYMBOL) {
        JSAtomStruct *p1;

        i = rt->atom_hash[p->hash & (rt->atom_hash_size - 1)];
        p1 = rt->atom_array[i];
        while (p1 != p) {
            assert(i != 0);
            i = p1->hash_next;
            p1 = rt->atom_array[i];
        }
    }
    return i;
}

/* string case (internal). Return JS_ATOM_NULL if error. 'str' is
   freed. */
static JSAtom __JS_NewAtom(JSRuntime *rt, JSString *str, int atom_type)
{
    uint32_t h, h1, i;
    JSAtomStruct *p;
    int len;

#if 0
    printf("__JS_NewAtom: ");  JS_DumpString(rt, str); printf("\n");
#endif
    if (atom_type < JS_ATOM_TYPE_SYMBOL) {
        /* str is not NULL */
        if (str->atom_type == atom_type) {
            /* str is the atom, return its index */
            i = js_get_atom_index(rt, str);
            /* reduce string refcount and increase atom's unless constant */
            if (__JS_AtomIsConst(i))
                str->header.ref_count--;
            return i;
        }
        /* try and locate an already registered atom */
        len = str->len;
        h = hash_string(str, atom_type);
        h &= JS_ATOM_HASH_MASK;
        h1 = h & (rt->atom_hash_size - 1);
        i = rt->atom_hash[h1];
        while (i != 0) {
            p = rt->atom_array[i];
            if (p->hash == h &&
                p->atom_type == atom_type &&
                p->len == len &&
                js_string_memcmp(p, str, len) == 0) {
                if (!__JS_AtomIsConst(i))
                    p->header.ref_count++;
                goto done;
            }
            i = p->hash_next;
        }
    } else {
        h1 = 0; /* avoid warning */
        if (atom_type == JS_ATOM_TYPE_SYMBOL) {
            h = JS_ATOM_HASH_SYMBOL;
        } else {
            h = JS_ATOM_HASH_PRIVATE;
            atom_type = JS_ATOM_TYPE_SYMBOL;
        }
    }

    if (rt->atom_free_index == 0) {
        /* allow new atom entries */
        uint32_t new_size, start;
        JSAtomStruct **new_array;

        /* alloc new with size progression 3/2:
           4 6 9 13 19 28 42 63 94 141 211 316 474 711 1066 1599 2398 3597 5395 8092
           preallocating space for predefined atoms (at least 195).
         */
        new_size = max_int(211, rt->atom_size * 3 / 2);
        if (new_size > JS_ATOM_MAX)
            goto fail;
        /* XXX: should use realloc2 to use slack space */
        new_array = (JSAtomStruct**) js_realloc_rt(rt, rt->atom_array, sizeof(*new_array) * new_size);
        if (!new_array)
            goto fail;
        /* Note: the atom 0 is not used */
        start = rt->atom_size;
        if (start == 0) {
            /* JS_ATOM_NULL entry */
            p = (JSAtomStruct*) js_mallocz_rt(rt, sizeof(JSAtomStruct));
            if (!p) {
                js_free_rt(rt, new_array);
                goto fail;
            }
            p->header.ref_count = 1;  /* not refcounted */
            p->atom_type = JS_ATOM_TYPE_SYMBOL;
#ifdef DUMP_LEAKS
            list_add_tail(&p->link, &rt->string_list);
#endif
            new_array[0] = p;
            rt->atom_count++;
            start = 1;
        }
        rt->atom_size = new_size;
        rt->atom_array = new_array;
        rt->atom_free_index = start;
        for(i = start; i < new_size; i++) {
            uint32_t next;
            if (i == (new_size - 1))
                next = 0;
            else
                next = i + 1;
            rt->atom_array[i] = atom_set_free(next);
        }
    }

    if (str) {
        if (str->atom_type == 0) {
            p = str;
            p->atom_type = atom_type;
        } else {
            p = (JSAtomStruct*) js_malloc_rt(rt, sizeof(JSString) +
                             (str->len << str->is_wide_char) +
                             1 - str->is_wide_char);
            if (js_unlikely(!p))
                goto fail;
            p->header.ref_count = 1;
            p->is_wide_char = str->is_wide_char;
            p->len = str->len;
#ifdef DUMP_LEAKS
            list_add_tail(&p->link, &rt->string_list);
#endif
            memcpy(p->u.str8, str->u.str8, (str->len << str->is_wide_char) +
                   1 - str->is_wide_char);
            js_free_string(rt, str);
        }
    } else {
        p = (JSAtomStruct*) js_malloc_rt(rt, sizeof(JSAtomStruct)); /* empty wide string */
        if (!p)
            return JS_ATOM_NULL;
        p->header.ref_count = 1;
        p->is_wide_char = 1;    /* Hack to represent NULL as a JSString */
        p->len = 0;
#ifdef DUMP_LEAKS
        list_add_tail(&p->link, &rt->string_list);
#endif
    }

    /* use an already free entry */
    i = rt->atom_free_index;
    rt->atom_free_index = atom_get_free(rt->atom_array[i]);
    rt->atom_array[i] = p;

    p->hash = h;
    p->hash_next = i;   /* atom_index */
    p->atom_type = atom_type;

    rt->atom_count++;

    if (atom_type != JS_ATOM_TYPE_SYMBOL) {
        p->hash_next = rt->atom_hash[h1];
        rt->atom_hash[h1] = i;
        if (js_unlikely(rt->atom_count >= rt->atom_count_resize))
            JS_ResizeAtomHash(rt, rt->atom_hash_size * 2);
    }

    //    JS_DumpAtoms(rt);
    return i;

 fail:
    i = JS_ATOM_NULL;
 done:
    if (str)
        js_free_string(rt, str);
    return i;
}

/* only works with zero terminated 8 bit strings */
static JSAtom __JS_NewAtomInit(JSRuntime *rt, const char *str, int len,
                               int atom_type)
{
    JSString *p;
    p = js_alloc_string_rt(rt, len, 0);
    if (!p)
        return JS_ATOM_NULL;
    memcpy(p->u.str8, str, len);
    p->u.str8[len] = '\0';
    return __JS_NewAtom(rt, p, atom_type);
}

static JSAtom __JS_FindAtom(JSRuntime *rt, const char *str, size_t len,
                            int atom_type)
{
    uint32_t h, h1, i;
    JSAtomStruct *p;

    h = hash_string8((const uint8_t *)str, len, JS_ATOM_TYPE_STRING);
    h &= JS_ATOM_HASH_MASK;
    h1 = h & (rt->atom_hash_size - 1);
    i = rt->atom_hash[h1];
    while (i != 0) {
        p = rt->atom_array[i];
        if (p->hash == h &&
            p->atom_type == JS_ATOM_TYPE_STRING &&
            p->len == len &&
            p->is_wide_char == 0 &&
            memcmp(p->u.str8, str, len) == 0) {
            if (!__JS_AtomIsConst(i))
                p->header.ref_count++;
            return i;
        }
        i = p->hash_next;
    }
    return JS_ATOM_NULL;
}

static void JS_FreeAtomStruct(JSRuntime *rt, JSAtomStruct *p)
{
#if 0   /* JS_ATOM_NULL is not refcounted: __JS_AtomIsConst() includes 0 */
    if (js_unlikely(i == JS_ATOM_NULL)) {
        p->header.ref_count = INT32_MAX / 2;
        return;
    }
#endif
    uint32_t i = p->hash_next;  /* atom_index */
    if (p->atom_type != JS_ATOM_TYPE_SYMBOL) {
        JSAtomStruct *p0, *p1;
        uint32_t h0;

        h0 = p->hash & (rt->atom_hash_size - 1);
        i = rt->atom_hash[h0];
        p1 = rt->atom_array[i];
        if (p1 == p) {
            rt->atom_hash[h0] = p1->hash_next;
        } else {
            for(;;) {
                assert(i != 0);
                p0 = p1;
                i = p1->hash_next;
                p1 = rt->atom_array[i];
                if (p1 == p) {
                    p0->hash_next = p1->hash_next;
                    break;
                }
            }
        }
    }
    /* insert in free atom list */
    rt->atom_array[i] = atom_set_free(rt->atom_free_index);
    rt->atom_free_index = i;
    /* free the string structure */
#ifdef DUMP_LEAKS
    list_del(&p->link);
#endif
    js_free_rt(rt, p);
    rt->atom_count--;
    assert(rt->atom_count >= 0);
}

static void __JS_FreeAtom(JSRuntime *rt, uint32_t i)
{
    JSAtomStruct *p;

    p = rt->atom_array[i];
    if (--p->header.ref_count > 0)
        return;
    JS_FreeAtomStruct(rt, p);
}

/* Warning: 'p' is freed */
static JSAtom JS_NewAtomStr(JSContext *ctx, JSString *p)
{
    JSRuntime *rt = ctx->rt;
    uint32_t n;
    if (is_num_string(&n, p)) {
        if (n <= JS_ATOM_MAX_INT) {
            js_free_string(rt, p);
            return __JS_AtomFromUInt32(n);
        }
    }
    /* XXX: should generate an exception */
    return __JS_NewAtom(rt, p, JS_ATOM_TYPE_STRING);
}

inline JSAtom JS_NewAtomLen(JSContext *ctx, const char *str, size_t len)
{
    JSValue val;

    if (len == 0 || !is_digit(*str)) {
        JSAtom atom = __JS_FindAtom(ctx->rt, str, len, JS_ATOM_TYPE_STRING);
        if (atom)
            return atom;
    }
    val = JS_NewStringLen(ctx, str, len);
    if (JS_IsException(val))
        return JS_ATOM_NULL;
    return JS_NewAtomStr(ctx, JS_VALUE_GET_STRING(val));
}

inline JSAtom JS_NewAtom(JSContext *ctx, const char *str)
{
    return JS_NewAtomLen(ctx, str, strlen(str));
}

inline JSAtom JS_NewAtomUInt32(JSContext *ctx, uint32_t n)
{
    if (n <= JS_ATOM_MAX_INT) {
        return __JS_AtomFromUInt32(n);
    } else {
        char buf[11];
        JSValue val;
        snprintf(buf, sizeof(buf), "%u", n);
        val = JS_NewString(ctx, buf);
        if (JS_IsException(val))
            return JS_ATOM_NULL;
        return __JS_NewAtom(ctx->rt, JS_VALUE_GET_STRING(val),
                            JS_ATOM_TYPE_STRING);
    }
}

static JSAtom JS_NewAtomInt64(JSContext *ctx, int64_t n)
{
    if ((uint64_t)n <= JS_ATOM_MAX_INT) {
        return __JS_AtomFromUInt32((uint32_t)n);
    } else {
        char buf[24];
        JSValue val;
        snprintf(buf, sizeof(buf), "%" PRId64 , n);
        val = JS_NewString(ctx, buf);
        if (JS_IsException(val))
            return JS_ATOM_NULL;
        return __JS_NewAtom(ctx->rt, JS_VALUE_GET_STRING(val),
                            JS_ATOM_TYPE_STRING);
    }
}

/* 'p' is freed */
static JSValue JS_NewSymbol(JSContext *ctx, JSString *p, int atom_type)
{
    JSRuntime *rt = ctx->rt;
    JSAtom atom;
    atom = __JS_NewAtom(rt, p, atom_type);
    if (atom == JS_ATOM_NULL)
        return JS_ThrowOutOfMemory(ctx);
    return JS_MKPTR(JS_TAG_SYMBOL, rt->atom_array[atom]);
}

/* descr must be a non-numeric string atom */
static JSValue JS_NewSymbolFromAtom(JSContext *ctx, JSAtom descr,
                                    int atom_type)
{
    JSRuntime *rt = ctx->rt;
    JSString *p;

    assert(!__JS_AtomIsTaggedInt(descr));
    assert(descr < rt->atom_size);
    p = rt->atom_array[descr];
    JS_DupValue(ctx, JS_MKPTR(JS_TAG_STRING, p));
    return JS_NewSymbol(ctx, p, atom_type);
}

#define ATOM_GET_STR_BUF_SIZE 64

/* Should only be used for debug. */
static const char *JS_AtomGetStrRT(JSRuntime *rt, char *buf, int buf_size,
                                   JSAtom atom)
{
    if (__JS_AtomIsTaggedInt(atom)) {
        snprintf(buf, buf_size, "%u", __JS_AtomToUInt32(atom));
    } else {
        JSAtomStruct *p;
        assert(atom < rt->atom_size);
        if (atom == JS_ATOM_NULL) {
            snprintf(buf, buf_size, "<null>");
        } else {
            int i, c;
            char *q;
            JSString *str;

            q = buf;
            p = rt->atom_array[atom];
            assert(!atom_is_free(p));
            str = p;
            if (str) {
                if (!str->is_wide_char) {
                    /* special case ASCII strings */
                    c = 0;
                    for(i = 0; i < str->len; i++) {
                        c |= str->u.str8[i];
                    }
                    if (c < 0x80)
                        return (const char *)str->u.str8;
                }
                for(i = 0; i < str->len; i++) {
                    if (str->is_wide_char)
                        c = str->u.str16[i];
                    else
                        c = str->u.str8[i];
                    if ((q - buf) >= buf_size - UTF8_CHAR_LEN_MAX)
                        break;
                    if (c < 128) {
                        *q++ = c;
                    } else {
                        q += unicode_to_utf8((uint8_t *)q, c);
                    }
                }
            }
            *q = '\0';
        }
    }
    return buf;
}

static const char *JS_AtomGetStr(JSContext *ctx, char *buf, int buf_size, JSAtom atom)
{
    return JS_AtomGetStrRT(ctx->rt, buf, buf_size, atom);
}

static JSValue __JS_AtomToValue(JSContext *ctx, JSAtom atom, BOOL force_string)
{
    char buf[ATOM_GET_STR_BUF_SIZE];

    if (__JS_AtomIsTaggedInt(atom)) {
        snprintf(buf, sizeof(buf), "%u", __JS_AtomToUInt32(atom));
        return JS_NewString(ctx, buf);
    } else {
        JSRuntime *rt = ctx->rt;
        JSAtomStruct *p;
        assert(atom < rt->atom_size);
        p = rt->atom_array[atom];
        if (p->atom_type == JS_ATOM_TYPE_STRING) {
            goto ret_string;
        } else if (force_string) {
            if (p->len == 0 && p->is_wide_char != 0) {
                /* no description string */
                p = rt->atom_array[JS_ATOM_empty_string];
            }
        ret_string:
            return JS_DupValue(ctx, JS_MKPTR(JS_TAG_STRING, p));
        } else {
            return JS_DupValue(ctx, JS_MKPTR(JS_TAG_SYMBOL, p));
        }
    }
}

inline JSValue JS_AtomToValue(JSContext *ctx, JSAtom atom)
{
    return __JS_AtomToValue(ctx, atom, FALSE);
}

inline JSValue JS_AtomToString(JSContext *ctx, JSAtom atom)
{
    return __JS_AtomToValue(ctx, atom, TRUE);
}

/* return TRUE if the atom is an array index (i.e. 0 <= index <=
   2^32-2 and return its value */
static BOOL JS_AtomIsArrayIndex(JSContext *ctx, uint32_t *pval, JSAtom atom)
{
    if (__JS_AtomIsTaggedInt(atom)) {
        *pval = __JS_AtomToUInt32(atom);
        return TRUE;
    } else {
        JSRuntime *rt = ctx->rt;
        JSAtomStruct *p;
        uint32_t val;

        assert(atom < rt->atom_size);
        p = rt->atom_array[atom];
        if (p->atom_type == JS_ATOM_TYPE_STRING &&
            is_num_string(&val, p) && val != -1) {
            *pval = val;
            return TRUE;
        } else {
            *pval = 0;
            return FALSE;
        }
    }
}

/* This test must be fast if atom is not a numeric index (e.g. a
   method name). Return JS_UNDEFINED if not a numeric
   index. JS_EXCEPTION can also be returned. */
static JSValue JS_AtomIsNumericIndex1(JSContext *ctx, JSAtom atom)
{
    JSRuntime *rt = ctx->rt;
    JSAtomStruct *p1;
    JSString *p;
    int c, len, ret;
    JSValue num, str;

    if (__JS_AtomIsTaggedInt(atom))
        return JS_NewInt32(ctx, __JS_AtomToUInt32(atom));
    assert(atom < rt->atom_size);
    p1 = rt->atom_array[atom];
    if (p1->atom_type != JS_ATOM_TYPE_STRING)
        return JS_UNDEFINED;
    p = p1;
    len = p->len;
    if (p->is_wide_char) {
        const uint16_t *r = p->u.str16, *r_end = p->u.str16 + len;
        if (r >= r_end)
            return JS_UNDEFINED;
        c = *r;
        if (c == '-') {
            if (r >= r_end)
                return JS_UNDEFINED;
            r++;
            c = *r;
            /* -0 case is specific */
            if (c == '0' && len == 2)
                return __JS_NewFloat64(ctx, -0.0);
        }
        /* XXX: should test NaN, but the tests do not check it */
        if (!is_num(c)) {
            /* XXX: String should be normalized, therefore 8-bit only */
            const uint16_t nfinity16[7] = { 'n', 'f', 'i', 'n', 'i', 't', 'y' };
            if (!(c =='I' && (r_end - r) == 8 &&
                  !memcmp(r + 1, nfinity16, sizeof(nfinity16))))
                return JS_UNDEFINED;
        }
    } else {
        const uint8_t *r = p->u.str8, *r_end = p->u.str8 + len;
        if (r >= r_end)
            return JS_UNDEFINED;
        c = *r;
        if (c == '-') {
            if (r >= r_end)
                return JS_UNDEFINED;
            r++;
            c = *r;
            /* -0 case is specific */
            if (c == '0' && len == 2) {
            minus_zero:
                return __JS_NewFloat64(ctx, -0.0);
            }
        }
        if (!is_num(c)) {
            if (!(c =='I' && (r_end - r) == 8 &&
                  !memcmp(r + 1, "nfinity", 7)))
                return JS_UNDEFINED;
        }
    }
    /* XXX: bignum: would be better to only accept integer to avoid
       relying on current floating point precision */
    /* this is ECMA CanonicalNumericIndexString primitive */
    num = JS_ToNumber(ctx, JS_MKPTR(JS_TAG_STRING, p));
    if (JS_IsException(num))
        return num;
    str = JS_ToString(ctx, num);
    if (JS_IsException(str)) {
        JS_FreeValue(ctx, num);
        return str;
    }
    ret = js_string_compare(ctx, p, JS_VALUE_GET_STRING(str));
    JS_FreeValue(ctx, str);
    if (ret == 0) {
        return num;
    } else {
        JS_FreeValue(ctx, num);
        return JS_UNDEFINED;
    }
}

/* return -1 if exception or TRUE/FALSE */
static int JS_AtomIsNumericIndex(JSContext *ctx, JSAtom atom)
{
    JSValue num;
    num = JS_AtomIsNumericIndex1(ctx, atom);
    if (js_likely(JS_IsUndefined(num)))
        return FALSE;
    if (JS_IsException(num))
        return -1;
    JS_FreeValue(ctx, num);
    return TRUE;
}

inline void JS_FreeAtom(JSContext *ctx, JSAtom v)
{
    if (!__JS_AtomIsConst(v))
        __JS_FreeAtom(ctx->rt, v);
}

inline void JS_FreeAtomRT(JSRuntime *rt, JSAtom v)
{
    if (!__JS_AtomIsConst(v))
        __JS_FreeAtom(rt, v);
}

/* return TRUE if 'v' is a symbol with a string description */
static BOOL JS_AtomSymbolHasDescription(JSContext *ctx, JSAtom v)
{
    JSRuntime *rt;
    JSAtomStruct *p;

    rt = ctx->rt;
    if (__JS_AtomIsTaggedInt(v))
        return FALSE;
    p = rt->atom_array[v];
    return (((p->atom_type == JS_ATOM_TYPE_SYMBOL &&
              p->hash == JS_ATOM_HASH_SYMBOL) ||
             p->atom_type == JS_ATOM_TYPE_GLOBAL_SYMBOL) &&
            !(p->len == 0 && p->is_wide_char != 0));
}

inline void print_atom(JSContext *ctx, JSAtom atom)
{
    char buf[ATOM_GET_STR_BUF_SIZE];
    const char *p;
    int i;

    /* XXX: should handle embedded null characters */
    /* XXX: should move encoding code to JS_AtomGetStr */
    p = JS_AtomGetStr(ctx, buf, sizeof(buf), atom);
    for (i = 0; p[i]; i++) {
        int c = (unsigned char)p[i];
        if (!((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
              (c == '_' || c == '$') || (c >= '0' && c <= '9' && i > 0)))
            break;
    }
    if (i > 0 && p[i] == '\0') {
        printf("%s", p);
    } else {
        putchar('"');
        printf("%.*s", i, p);
        for (; p[i]; i++) {
            int c = (unsigned char)p[i];
            if (c == '\"' || c == '\\') {
                putchar('\\');
                putchar(c);
            } else if (c >= ' ' && c <= 126) {
                putchar(c);
            } else if (c == '\n') {
                putchar('\\');
                putchar('n');
            } else {
                printf("\\u%04x", c);
            }
        }
        putchar('\"');
    }
}

/* free with JS_FreeCString() */
inline const char *JS_AtomToCString(JSContext *ctx, JSAtom atom)
{
    JSValue str;
    const char *cstr;

    str = JS_AtomToString(ctx, atom);
    if (JS_IsException(str))
        return NULL;
    cstr = JS_ToCString(ctx, str);
    JS_FreeValue(ctx, str);
    return cstr;
}

/* return a string atom containing name concatenated with str1 */
static JSAtom js_atom_concat_str(JSContext *ctx, JSAtom name, const char *str1)
{
    JSValue str;
    JSAtom atom;
    const char *cstr;
    char *cstr2;
    size_t len, len1;

    str = JS_AtomToString(ctx, name);
    if (JS_IsException(str))
        return JS_ATOM_NULL;
    cstr = JS_ToCStringLen(ctx, &len, str);
    if (!cstr)
        goto fail;
    len1 = strlen(str1);
    cstr2 = (char*) js_malloc(ctx, len + len1 + 1);
    if (!cstr2)
        goto fail;
    memcpy(cstr2, cstr, len);
    memcpy(cstr2 + len, str1, len1);
    cstr2[len + len1] = '\0';
    atom = JS_NewAtomLen(ctx, cstr2, len + len1);
    js_free(ctx, cstr2);
    JS_FreeCString(ctx, cstr);
    JS_FreeValue(ctx, str);
    return atom;
 fail:
    JS_FreeCString(ctx, cstr);
    JS_FreeValue(ctx, str);
    return JS_ATOM_NULL;
}

static JSAtom js_atom_concat_num(JSContext *ctx, JSAtom name, uint32_t n)
{
    char buf[16];
    snprintf(buf, sizeof(buf), "%u", n);
    return js_atom_concat_str(ctx, name, buf);
}

static inline BOOL JS_IsEmptyString(JSValueConst v)
{
    return JS_VALUE_GET_TAG(v) == JS_TAG_STRING && JS_VALUE_GET_STRING(v)->len == 0;
}

/* JSClass support */

/* a new class ID is allocated if *pclass_id != 0 */
inline JSClassID JS_NewClassID(JSClassID *pclass_id)
{
    JSClassID class_id;
    /* XXX: make it thread safe */
    class_id = *pclass_id;
    if (class_id == 0) {
        class_id = js_class_id_alloc++;
        *pclass_id = class_id;
    }
    return class_id;
}

inline BOOL JS_IsRegisteredClass(JSRuntime *rt, JSClassID class_id)
{
    return (class_id < rt->class_count &&
            rt->class_array[class_id].class_id != 0);
}

/* create a new object internal class. Return -1 if error, 0 if
   OK. The finalizer can be NULL if none is needed. */
static int JS_NewClass1(JSRuntime *rt, JSClassID class_id,
                        const JSClassDef *class_def, JSAtom name)
{
    int new_size, i;
    JSClass *cl, *new_class_array;
    struct list_head *el;

    if (class_id >= (1 << 16))
        return -1;
    if (class_id < rt->class_count &&
        rt->class_array[class_id].class_id != 0)
        return -1;

    if (class_id >= rt->class_count) {
        new_size = max_int(JS_CLASS_INIT_COUNT,
                           max_int(class_id + 1, rt->class_count * 3 / 2));

        /* reallocate the context class prototype array, if any */
        list_for_each(el, &rt->context_list) {
            JSContext *ctx = list_entry(el, JSContext, link);
            JSValue *new_tab;
            new_tab = (JSValue*) js_realloc_rt(rt, ctx->class_proto,
                                    sizeof(ctx->class_proto[0]) * new_size);
            if (!new_tab)
                return -1;
            for(i = rt->class_count; i < new_size; i++)
                new_tab[i] = JS_NULL;
            ctx->class_proto = new_tab;
        }
        /* reallocate the class array */
        new_class_array = (JSClass*) js_realloc_rt(rt, rt->class_array,
                                        sizeof(JSClass) * new_size);
        if (!new_class_array)
            return -1;
        memset(new_class_array + rt->class_count, 0,
               (new_size - rt->class_count) * sizeof(JSClass));
        rt->class_array = new_class_array;
        rt->class_count = new_size;
    }
    cl = &rt->class_array[class_id];
    cl->class_id = class_id;
    cl->class_name = JS_DupAtomRT(rt, name);
    cl->finalizer = class_def->finalizer;
    cl->gc_mark = class_def->gc_mark;
    cl->call = class_def->call;
    cl->exotic = class_def->exotic;
    return 0;
}

inline int JS_NewClass(JSRuntime *rt, JSClassID class_id, const JSClassDef *class_def)
{
    int ret, len;
    JSAtom name;

    len = strlen(class_def->class_name);
    name = __JS_FindAtom(rt, class_def->class_name, len, JS_ATOM_TYPE_STRING);
    if (name == JS_ATOM_NULL) {
        name = __JS_NewAtomInit(rt, class_def->class_name, len, JS_ATOM_TYPE_STRING);
        if (name == JS_ATOM_NULL)
            return -1;
    }
    ret = JS_NewClass1(rt, class_id, class_def, name);
    JS_FreeAtomRT(rt, name);
    return ret;
}

static JSValue js_new_string8(JSContext *ctx, const uint8_t *buf, int len)
{
    JSString *str;

    if (len <= 0) {
        return JS_AtomToString(ctx, JS_ATOM_empty_string);
    }
    str = js_alloc_string(ctx, len, 0);
    if (!str)
        return JS_EXCEPTION;
    memcpy(str->u.str8, buf, len);
    str->u.str8[len] = '\0';
    return JS_MKPTR(JS_TAG_STRING, str);
}

static JSValue js_new_string16(JSContext *ctx, const uint16_t *buf, int len)
{
    JSString *str;
    str = js_alloc_string(ctx, len, 1);
    if (!str)
        return JS_EXCEPTION;
    memcpy(str->u.str16, buf, len * 2);
    return JS_MKPTR(JS_TAG_STRING, str);
}

static JSValue js_new_string_char(JSContext *ctx, uint16_t c)
{
    if (c < 0x100) {
        uint8_t ch8 = c;
        return js_new_string8(ctx, &ch8, 1);
    } else {
        uint16_t ch16 = c;
        return js_new_string16(ctx, &ch16, 1);
    }
}

static JSValue js_sub_string(JSContext *ctx, JSString *p, int start, int end)
{
    int len = end - start;
    if (start == 0 && end == p->len) {
        return JS_DupValue(ctx, JS_MKPTR(JS_TAG_STRING, p));
    }
    if (p->is_wide_char && len > 0) {
        JSString *str;
        int i;
        uint16_t c = 0;
        for (i = start; i < end; i++) {
            c |= p->u.str16[i];
        }
        if (c > 0xFF)
            return js_new_string16(ctx, p->u.str16 + start, len);

        str = js_alloc_string(ctx, len, 0);
        if (!str)
            return JS_EXCEPTION;
        for (i = 0; i < len; i++) {
            str->u.str8[i] = p->u.str16[start + i];
        }
        str->u.str8[len] = '\0';
        return JS_MKPTR(JS_TAG_STRING, str);
    } else {
        return js_new_string8(ctx, p->u.str8 + start, len);
    }
}

typedef struct StringBuffer {
    JSContext *ctx;
    JSString *str;
    int len;
    int size;
    int is_wide_char;
    int error_status;
} StringBuffer;

/* It is valid to call string_buffer_end() and all string_buffer functions even
   if string_buffer_init() or another string_buffer function returns an error.
   If the error_status is set, string_buffer_end() returns JS_EXCEPTION.
 */
static int string_buffer_init2(JSContext *ctx, StringBuffer *s, int size,
                               int is_wide)
{
    s->ctx = ctx;
    s->size = size;
    s->len = 0;
    s->is_wide_char = is_wide;
    s->error_status = 0;
    s->str = js_alloc_string(ctx, size, is_wide);
    if (js_unlikely(!s->str)) {
        s->size = 0;
        return s->error_status = -1;
    }
#ifdef DUMP_LEAKS
    /* the StringBuffer may reallocate the JSString, only link it at the end */
    list_del(&s->str->link);
#endif
    return 0;
}

static inline int string_buffer_init(JSContext *ctx, StringBuffer *s, int size)
{
    return string_buffer_init2(ctx, s, size, 0);
}

static void string_buffer_free(StringBuffer *s)
{
    js_free(s->ctx, s->str);
    s->str = NULL;
}

static int string_buffer_set_error(StringBuffer *s)
{
    js_free(s->ctx, s->str);
    s->str = NULL;
    s->size = 0;
    s->len = 0;
    return s->error_status = -1;
}

static no_inline int string_buffer_widen(StringBuffer *s, int size)
{
    JSString *str;
    size_t slack;
    int i;

    if (s->error_status)
        return -1;

    str = (JSString*) js_realloc2(s->ctx, s->str, sizeof(JSString) + (size << 1), &slack);
    if (!str)
        return string_buffer_set_error(s);
    size += slack >> 1;
    for(i = s->len; i-- > 0;) {
        str->u.str16[i] = str->u.str8[i];
    }
    s->is_wide_char = 1;
    s->size = size;
    s->str = str;
    return 0;
}

static no_inline int string_buffer_realloc(StringBuffer *s, int new_len, int c)
{
    JSString *new_str;
    int new_size;
    size_t new_size_bytes, slack;

    if (s->error_status)
        return -1;

    if (new_len > JS_STRING_LEN_MAX) {
        JS_ThrowInternalError(s->ctx, "string too long");
        return string_buffer_set_error(s);
    }
    new_size = min_int(max_int(new_len, s->size * 3 / 2), JS_STRING_LEN_MAX);
    if (!s->is_wide_char && c >= 0x100) {
        return string_buffer_widen(s, new_size);
    }
    new_size_bytes = sizeof(JSString) + (new_size << s->is_wide_char) + 1 - s->is_wide_char;
    new_str = (JSString*) js_realloc2(s->ctx, s->str, new_size_bytes, &slack);
    if (!new_str)
        return string_buffer_set_error(s);
    new_size = min_int(new_size + (slack >> s->is_wide_char), JS_STRING_LEN_MAX);
    s->size = new_size;
    s->str = new_str;
    return 0;
}

static no_inline int string_buffer_putc_slow(StringBuffer *s, uint32_t c)
{
    if (js_unlikely(s->len >= s->size)) {
        if (string_buffer_realloc(s, s->len + 1, c))
            return -1;
    }
    if (s->is_wide_char) {
        s->str->u.str16[s->len++] = c;
    } else if (c < 0x100) {
        s->str->u.str8[s->len++] = c;
    } else {
        if (string_buffer_widen(s, s->size))
            return -1;
        s->str->u.str16[s->len++] = c;
    }
    return 0;
}

/* 0 <= c <= 0xff */
static int string_buffer_putc8(StringBuffer *s, uint32_t c)
{
    if (js_unlikely(s->len >= s->size)) {
        if (string_buffer_realloc(s, s->len + 1, c))
            return -1;
    }
    if (s->is_wide_char) {
        s->str->u.str16[s->len++] = c;
    } else {
        s->str->u.str8[s->len++] = c;
    }
    return 0;
}

/* 0 <= c <= 0xffff */
static int string_buffer_putc16(StringBuffer *s, uint32_t c)
{
    if (js_likely(s->len < s->size)) {
        if (s->is_wide_char) {
            s->str->u.str16[s->len++] = c;
            return 0;
        } else if (c < 0x100) {
            s->str->u.str8[s->len++] = c;
            return 0;
        }
    }
    return string_buffer_putc_slow(s, c);
}

/* 0 <= c <= 0x10ffff */
static int string_buffer_putc(StringBuffer *s, uint32_t c)
{
    if (js_unlikely(c >= 0x10000)) {
        /* surrogate pair */
        c -= 0x10000;
        if (string_buffer_putc16(s, (c >> 10) + 0xd800))
            return -1;
        c = (c & 0x3ff) + 0xdc00;
    }
    return string_buffer_putc16(s, c);
}

static int string_get(const JSString *p, int idx) {
    return p->is_wide_char ? p->u.str16[idx] : p->u.str8[idx];
}

static int string_getc(const JSString *p, int *pidx)
{
    int idx, c, c1;
    idx = *pidx;
    if (p->is_wide_char) {
        c = p->u.str16[idx++];
        if (c >= 0xd800 && c < 0xdc00 && idx < p->len) {
            c1 = p->u.str16[idx];
            if (c1 >= 0xdc00 && c1 < 0xe000) {
                c = (((c & 0x3ff) << 10) | (c1 & 0x3ff)) + 0x10000;
                idx++;
            }
        }
    } else {
        c = p->u.str8[idx++];
    }
    *pidx = idx;
    return c;
}

static int string_buffer_write8(StringBuffer *s, const uint8_t *p, int len)
{
    int i;

    if (s->len + len > s->size) {
        if (string_buffer_realloc(s, s->len + len, 0))
            return -1;
    }
    if (s->is_wide_char) {
        for (i = 0; i < len; i++) {
            s->str->u.str16[s->len + i] = p[i];
        }
        s->len += len;
    } else {
        memcpy(&s->str->u.str8[s->len], p, len);
        s->len += len;
    }
    return 0;
}

static int string_buffer_write16(StringBuffer *s, const uint16_t *p, int len)
{
    int c = 0, i;

    for (i = 0; i < len; i++) {
        c |= p[i];
    }
    if (s->len + len > s->size) {
        if (string_buffer_realloc(s, s->len + len, c))
            return -1;
    } else if (!s->is_wide_char && c >= 0x100) {
        if (string_buffer_widen(s, s->size))
            return -1;
    }
    if (s->is_wide_char) {
        memcpy(&s->str->u.str16[s->len], p, len << 1);
        s->len += len;
    } else {
        for (i = 0; i < len; i++) {
            s->str->u.str8[s->len + i] = p[i];
        }
        s->len += len;
    }
    return 0;
}

/* appending an ASCII string */
static int string_buffer_puts8(StringBuffer *s, const char *str)
{
    return string_buffer_write8(s, (const uint8_t *)str, strlen(str));
}

static int string_buffer_concat(StringBuffer *s, const JSString *p,
                                uint32_t from, uint32_t to)
{
    if (to <= from)
        return 0;
    if (p->is_wide_char)
        return string_buffer_write16(s, p->u.str16 + from, to - from);
    else
        return string_buffer_write8(s, p->u.str8 + from, to - from);
}

static int string_buffer_concat_value(StringBuffer *s, JSValueConst v)
{
    JSString *p;
    JSValue v1;
    int res;

    if (s->error_status) {
        /* prevent exception overload */
        return -1;
    }
    if (js_unlikely(JS_VALUE_GET_TAG(v) != JS_TAG_STRING)) {
        v1 = JS_ToString(s->ctx, v);
        if (JS_IsException(v1))
            return string_buffer_set_error(s);
        p = JS_VALUE_GET_STRING(v1);
        res = string_buffer_concat(s, p, 0, p->len);
        JS_FreeValue(s->ctx, v1);
        return res;
    }
    p = JS_VALUE_GET_STRING(v);
    return string_buffer_concat(s, p, 0, p->len);
}

static int string_buffer_concat_value_free(StringBuffer *s, JSValue v)
{
    JSString *p;
    int res;

    if (s->error_status) {
        /* prevent exception overload */
        JS_FreeValue(s->ctx, v);
        return -1;
    }
    if (js_unlikely(JS_VALUE_GET_TAG(v) != JS_TAG_STRING)) {
        v = JS_ToStringFree(s->ctx, v);
        if (JS_IsException(v))
            return string_buffer_set_error(s);
    }
    p = JS_VALUE_GET_STRING(v);
    res = string_buffer_concat(s, p, 0, p->len);
    JS_FreeValue(s->ctx, v);
    return res;
}

static int string_buffer_fill(StringBuffer *s, int c, int count)
{
    /* XXX: optimize */
    if (s->len + count > s->size) {
        if (string_buffer_realloc(s, s->len + count, c))
            return -1;
    }
    while (count-- > 0) {
        if (string_buffer_putc16(s, c))
            return -1;
    }
    return 0;
}

static JSValue string_buffer_end(StringBuffer *s)
{
    JSString *str;
    str = s->str;
    if (s->error_status)
        return JS_EXCEPTION;
    if (s->len == 0) {
        js_free(s->ctx, str);
        s->str = NULL;
        return JS_AtomToString(s->ctx, JS_ATOM_empty_string);
    }
    if (s->len < s->size) {
        /* smaller size so js_realloc should not fail, but OK if it does */
        /* XXX: should add some slack to avoid unnecessary calls */
        /* XXX: might need to use malloc+free to ensure smaller size */
        str = (JSString*) js_realloc_rt(s->ctx->rt, str, sizeof(JSString) +
                            (s->len << s->is_wide_char) + 1 - s->is_wide_char);
        if (str == NULL)
            str = s->str;
        s->str = str;
    }
    if (!s->is_wide_char)
        str->u.str8[s->len] = 0;
#ifdef DUMP_LEAKS
    list_add_tail(&str->link, &s->ctx->rt->string_list);
#endif
    str->is_wide_char = s->is_wide_char;
    str->len = s->len;
    s->str = NULL;
    return JS_MKPTR(JS_TAG_STRING, str);
}

/* create a string from a UTF-8 buffer */
inline JSValue JS_NewStringLen(JSContext *ctx, const char *buf, size_t buf_len)
{
    const uint8_t *p, *p_end, *p_start, *p_next;
    uint32_t c;
    StringBuffer b_s, *b = &b_s;
    size_t len1;

    p_start = (const uint8_t *)buf;
    p_end = p_start + buf_len;
    p = p_start;
    while (p < p_end && *p < 128)
        p++;
    len1 = p - p_start;
    if (len1 > JS_STRING_LEN_MAX)
        return JS_ThrowInternalError(ctx, "string too long");
    if (p == p_end) {
        /* ASCII string */
        return js_new_string8(ctx, (const uint8_t *)buf, buf_len);
    } else {
        if (string_buffer_init(ctx, b, buf_len))
            goto fail;
        string_buffer_write8(b, p_start, len1);
        while (p < p_end) {
            if (*p < 128) {
                string_buffer_putc8(b, *p++);
            } else {
                /* parse utf-8 sequence, return 0xFFFFFFFF for error */
                c = unicode_from_utf8(p, p_end - p, &p_next);
                if (c < 0x10000) {
                    p = p_next;
                } else if (c <= 0x10FFFF) {
                    p = p_next;
                    /* surrogate pair */
                    c -= 0x10000;
                    string_buffer_putc16(b, (c >> 10) + 0xd800);
                    c = (c & 0x3ff) + 0xdc00;
                } else {
                    /* invalid char */
                    c = 0xfffd;
                    /* skip the invalid chars */
                    /* XXX: seems incorrect. Why not just use c = *p++; ? */
                    while (p < p_end && (*p >= 0x80 && *p < 0xc0))
                        p++;
                    if (p < p_end) {
                        p++;
                        while (p < p_end && (*p >= 0x80 && *p < 0xc0))
                            p++;
                    }
                }
                string_buffer_putc16(b, c);
            }
        }
    }
    return string_buffer_end(b);

 fail:
    string_buffer_free(b);
    return JS_EXCEPTION;
}

static JSValue JS_ConcatString3(JSContext *ctx, const char *str1,
                                JSValue str2, const char *str3)
{
    StringBuffer b_s, *b = &b_s;
    int len1, len3;
    JSString *p;

    if (js_unlikely(JS_VALUE_GET_TAG(str2) != JS_TAG_STRING)) {
        str2 = JS_ToStringFree(ctx, str2);
        if (JS_IsException(str2))
            goto fail;
    }
    p = JS_VALUE_GET_STRING(str2);
    len1 = strlen(str1);
    len3 = strlen(str3);

    if (string_buffer_init2(ctx, b, len1 + p->len + len3, p->is_wide_char))
        goto fail;

    string_buffer_write8(b, (const uint8_t *)str1, len1);
    string_buffer_concat(b, p, 0, p->len);
    string_buffer_write8(b, (const uint8_t *)str3, len3);

    JS_FreeValue(ctx, str2);
    return string_buffer_end(b);

 fail:
    JS_FreeValue(ctx, str2);
    return JS_EXCEPTION;
}

inline JSValue JS_NewString(JSContext *ctx, const char *str)
{
    return JS_NewStringLen(ctx, str, strlen(str));
}

inline JSValue JS_NewAtomString(JSContext *ctx, const char *str)
{
    JSAtom atom = JS_NewAtom(ctx, str);
    if (atom == JS_ATOM_NULL)
        return JS_EXCEPTION;
    JSValue val = JS_AtomToString(ctx, atom);
    JS_FreeAtom(ctx, atom);
    return val;
}

/* return (NULL, 0) if exception. */
/* return pointer into a JSString with a live ref_count */
/* cesu8 determines if non-BMP1 codepoints are encoded as 1 or 2 utf-8 sequences */
inline const char *JS_ToCStringLen2(JSContext *ctx, size_t *plen, JSValueConst val1, BOOL cesu8)
{
    JSValue val;
    JSString *str, *str_new;
    int pos, len, c, c1;
    uint8_t *q;

    if (JS_VALUE_GET_TAG(val1) != JS_TAG_STRING) {
        val = JS_ToString(ctx, val1);
        if (JS_IsException(val))
            goto fail;
    } else {
        val = JS_DupValue(ctx, val1);
    }

    str = JS_VALUE_GET_STRING(val);
    len = str->len;
    if (!str->is_wide_char) {
        const uint8_t *src = str->u.str8;
        int count;

        /* count the number of non-ASCII characters */
        /* Scanning the whole string is required for ASCII strings,
           and computing the number of non-ASCII bytes is less expensive
           than testing each byte, hence this method is faster for ASCII
           strings, which is the most common case.
         */
        count = 0;
        for (pos = 0; pos < len; pos++) {
            count += src[pos] >> 7;
        }
        if (count == 0) {
            if (plen)
                *plen = len;
            return (const char *)src;
        }
        str_new = js_alloc_string(ctx, len + count, 0);
        if (!str_new)
            goto fail;
        q = str_new->u.str8;
        for (pos = 0; pos < len; pos++) {
            c = src[pos];
            if (c < 0x80) {
                *q++ = c;
            } else {
                *q++ = (c >> 6) | 0xc0;
                *q++ = (c & 0x3f) | 0x80;
            }
        }
    } else {
        const uint16_t *src = str->u.str16;
        /* Allocate 3 bytes per 16 bit code point. Surrogate pairs may
           produce 4 bytes but use 2 code points.
         */
        str_new = js_alloc_string(ctx, len * 3, 0);
        if (!str_new)
            goto fail;
        q = str_new->u.str8;
        pos = 0;
        while (pos < len) {
            c = src[pos++];
            if (c < 0x80) {
                *q++ = c;
            } else {
                if (c >= 0xd800 && c < 0xdc00) {
                    if (pos < len && !cesu8) {
                        c1 = src[pos];
                        if (c1 >= 0xdc00 && c1 < 0xe000) {
                            pos++;
                            /* surrogate pair */
                            c = (((c & 0x3ff) << 10) | (c1 & 0x3ff)) + 0x10000;
                        } else {
                            /* Keep unmatched surrogate code points */
                            /* c = 0xfffd; */ /* error */
                        }
                    } else {
                        /* Keep unmatched surrogate code points */
                        /* c = 0xfffd; */ /* error */
                    }
                }
                q += unicode_to_utf8(q, c);
            }
        }
    }

    *q = '\0';
    str_new->len = q - str_new->u.str8;
    JS_FreeValue(ctx, val);
    if (plen)
        *plen = str_new->len;
    return (const char *)str_new->u.str8;
 fail:
    if (plen)
        *plen = 0;
    return NULL;
}

inline void JS_FreeCString(JSContext *ctx, const char *ptr)
{
    JSString *p;
    if (!ptr)
        return;
    /* purposely removing constness */
    p = (JSString *)(void *)(ptr - offsetof(JSString, u));
    JS_FreeValue(ctx, JS_MKPTR(JS_TAG_STRING, p));
}

static int memcmp16_8(const uint16_t *src1, const uint8_t *src2, int len)
{
    int c, i;
    for(i = 0; i < len; i++) {
        c = src1[i] - src2[i];
        if (c != 0)
            return c;
    }
    return 0;
}

static int memcmp16(const uint16_t *src1, const uint16_t *src2, int len)
{
    int c, i;
    for(i = 0; i < len; i++) {
        c = src1[i] - src2[i];
        if (c != 0)
            return c;
    }
    return 0;
}

static int js_string_memcmp(const JSString *p1, const JSString *p2, int len)
{
    int res;

    if (js_likely(!p1->is_wide_char)) {
        if (js_likely(!p2->is_wide_char))
            res = memcmp(p1->u.str8, p2->u.str8, len);
        else
            res = -memcmp16_8(p2->u.str16, p1->u.str8, len);
    } else {
        if (!p2->is_wide_char)
            res = memcmp16_8(p1->u.str16, p2->u.str8, len);
        else
            res = memcmp16(p1->u.str16, p2->u.str16, len);
    }
    return res;
}

/* return < 0, 0 or > 0 */
static int js_string_compare(JSContext *ctx,
                             const JSString *p1, const JSString *p2)
{
    int res, len;
    len = min_int(p1->len, p2->len);
    res = js_string_memcmp(p1, p2, len);
    if (res == 0) {
        if (p1->len == p2->len)
            res = 0;
        else if (p1->len < p2->len)
            res = -1;
        else
            res = 1;
    }
    return res;
}

static void copy_str16(uint16_t *dst, const JSString *p, int offset, int len)
{
    if (p->is_wide_char) {
        memcpy(dst, p->u.str16 + offset, len * 2);
    } else {
        const uint8_t *src1 = p->u.str8 + offset;
        int i;

        for(i = 0; i < len; i++)
            dst[i] = src1[i];
    }
}

static JSValue JS_ConcatString1(JSContext *ctx,
                                const JSString *p1, const JSString *p2)
{
    JSString *p;
    uint32_t len;
    int is_wide_char;

    len = p1->len + p2->len;
    if (len > JS_STRING_LEN_MAX)
        return JS_ThrowInternalError(ctx, "string too long");
    is_wide_char = p1->is_wide_char | p2->is_wide_char;
    p = js_alloc_string(ctx, len, is_wide_char);
    if (!p)
        return JS_EXCEPTION;
    if (!is_wide_char) {
        memcpy(p->u.str8, p1->u.str8, p1->len);
        memcpy(p->u.str8 + p1->len, p2->u.str8, p2->len);
        p->u.str8[len] = '\0';
    } else {
        copy_str16(p->u.str16, p1, 0, p1->len);
        copy_str16(p->u.str16 + p1->len, p2, 0, p2->len);
    }
    return JS_MKPTR(JS_TAG_STRING, p);
}

/* op1 and op2 are converted to strings. For convience, op1 or op2 =
   JS_EXCEPTION are accepted and return JS_EXCEPTION.  */
static JSValue JS_ConcatString(JSContext *ctx, JSValue op1, JSValue op2)
{
    JSValue ret;
    JSString *p1, *p2;

    if (js_unlikely(JS_VALUE_GET_TAG(op1) != JS_TAG_STRING)) {
        op1 = JS_ToStringFree(ctx, op1);
        if (JS_IsException(op1)) {
            JS_FreeValue(ctx, op2);
            return JS_EXCEPTION;
        }
    }
    if (js_unlikely(JS_VALUE_GET_TAG(op2) != JS_TAG_STRING)) {
        op2 = JS_ToStringFree(ctx, op2);
        if (JS_IsException(op2)) {
            JS_FreeValue(ctx, op1);
            return JS_EXCEPTION;
        }
    }
    p1 = JS_VALUE_GET_STRING(op1);
    p2 = JS_VALUE_GET_STRING(op2);

    /* XXX: could also check if p1 is empty */
    if (p2->len == 0) {
        goto ret_op1;
    }
    if (p1->header.ref_count == 1 && p1->is_wide_char == p2->is_wide_char
    &&  js_malloc_usable_size(ctx, p1) >= sizeof(*p1) + ((p1->len + p2->len) << p2->is_wide_char) + 1 - p1->is_wide_char) {
        /* Concatenate in place in available space at the end of p1 */
        if (p1->is_wide_char) {
            memcpy(p1->u.str16 + p1->len, p2->u.str16, p2->len << 1);
            p1->len += p2->len;
        } else {
            memcpy(p1->u.str8 + p1->len, p2->u.str8, p2->len);
            p1->len += p2->len;
            p1->u.str8[p1->len] = '\0';
        }
    ret_op1:
        JS_FreeValue(ctx, op2);
        return op1;
    }
    ret = JS_ConcatString1(ctx, p1, p2);
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    return ret;
}

/* Shape support */

static inline size_t get_shape_size(size_t hash_size, size_t prop_size)
{
    return hash_size * sizeof(uint32_t) + sizeof(JSShape) +
        prop_size * sizeof(JSShapeProperty);
}

static inline JSShape *get_shape_from_alloc(void *sh_alloc, size_t hash_size)
{
    return (JSShape *)(void *)((uint32_t *)sh_alloc + hash_size);
}

static inline uint32_t *prop_hash_end(JSShape *sh)
{
    return (uint32_t *)sh;
}

static inline void *get_alloc_from_shape(JSShape *sh)
{
    return prop_hash_end(sh) - ((intptr_t)sh->prop_hash_mask + 1);
}

static inline JSShapeProperty *get_shape_prop(JSShape *sh)
{
    return sh->prop;
}

static int init_shape_hash(JSRuntime *rt)
{
    rt->shape_hash_bits = 4;   /* 16 shapes */
    rt->shape_hash_size = 1 << rt->shape_hash_bits;
    rt->shape_hash_count = 0;
    rt->shape_hash = (JSShape**) js_mallocz_rt(rt, sizeof(rt->shape_hash[0]) *
                                   rt->shape_hash_size);
    if (!rt->shape_hash)
        return -1;
    return 0;
}

/* same magic hash multiplier as the Linux kernel */
static uint32_t shape_hash(uint32_t h, uint32_t val)
{
    return (h + val) * 0x9e370001;
}

/* truncate the shape hash to 'hash_bits' bits */
static uint32_t get_shape_hash(uint32_t h, int hash_bits)
{
    return h >> (32 - hash_bits);
}

static uint32_t shape_initial_hash(JSObject *proto)
{
    uint32_t h;
    h = shape_hash(1, (uintptr_t)proto);
    if (sizeof(proto) > 4)
        h = shape_hash(h, (uint64_t)(uintptr_t)proto >> 32);
    return h;
}

static int resize_shape_hash(JSRuntime *rt, int new_shape_hash_bits)
{
    int new_shape_hash_size, i;
    uint32_t h;
    JSShape **new_shape_hash, *sh, *sh_next;

    new_shape_hash_size = 1 << new_shape_hash_bits;
    new_shape_hash = (JSShape**) js_mallocz_rt(rt, sizeof(rt->shape_hash[0]) *
                                   new_shape_hash_size);
    if (!new_shape_hash)
        return -1;
    for(i = 0; i < rt->shape_hash_size; i++) {
        for(sh = rt->shape_hash[i]; sh != NULL; sh = sh_next) {
            sh_next = sh->shape_hash_next;
            h = get_shape_hash(sh->hash, new_shape_hash_bits);
            sh->shape_hash_next = new_shape_hash[h];
            new_shape_hash[h] = sh;
        }
    }
    js_free_rt(rt, rt->shape_hash);
    rt->shape_hash_bits = new_shape_hash_bits;
    rt->shape_hash_size = new_shape_hash_size;
    rt->shape_hash = new_shape_hash;
    return 0;
}

static void js_shape_hash_link(JSRuntime *rt, JSShape *sh)
{
    uint32_t h;
    h = get_shape_hash(sh->hash, rt->shape_hash_bits);
    sh->shape_hash_next = rt->shape_hash[h];
    rt->shape_hash[h] = sh;
    rt->shape_hash_count++;
}

static void js_shape_hash_unlink(JSRuntime *rt, JSShape *sh)
{
    uint32_t h;
    JSShape **psh;

    h = get_shape_hash(sh->hash, rt->shape_hash_bits);
    psh = &rt->shape_hash[h];
    while (*psh != sh)
        psh = &(*psh)->shape_hash_next;
    *psh = sh->shape_hash_next;
    rt->shape_hash_count--;
}

/* create a new empty shape with prototype 'proto' */
static no_inline JSShape *js_new_shape2(JSContext *ctx, JSObject *proto,
                                        int hash_size, int prop_size)
{
    JSRuntime *rt = ctx->rt;
    void *sh_alloc;
    JSShape *sh;

    /* resize the shape hash table if necessary */
    if (2 * (rt->shape_hash_count + 1) > rt->shape_hash_size) {
        resize_shape_hash(rt, rt->shape_hash_bits + 1);
    }

    sh_alloc = js_malloc(ctx, get_shape_size(hash_size, prop_size));
    if (!sh_alloc)
        return NULL;
    sh = get_shape_from_alloc(sh_alloc, hash_size);
    sh->header.ref_count = 1;
    add_gc_object(rt, &sh->header, JS_GC_OBJ_TYPE_SHAPE);
    if (proto)
        JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, proto));
    sh->proto = proto;
    memset(prop_hash_end(sh) - hash_size, 0, sizeof(prop_hash_end(sh)[0]) *
           hash_size);
    sh->prop_hash_mask = hash_size - 1;
    sh->prop_size = prop_size;
    sh->prop_count = 0;
    sh->deleted_prop_count = 0;

    /* insert in the hash table */
    sh->hash = shape_initial_hash(proto);
    sh->is_hashed = TRUE;
    sh->has_small_array_index = FALSE;
    js_shape_hash_link(ctx->rt, sh);
    return sh;
}

static JSShape *js_new_shape(JSContext *ctx, JSObject *proto)
{
    return js_new_shape2(ctx, proto, JS_PROP_INITIAL_HASH_SIZE,
                         JS_PROP_INITIAL_SIZE);
}

/* The shape is cloned. The new shape is not inserted in the shape
   hash table */
static JSShape *js_clone_shape(JSContext *ctx, JSShape *sh1)
{
    JSShape *sh;
    void *sh_alloc, *sh_alloc1;
    size_t size;
    JSShapeProperty *pr;
    uint32_t i, hash_size;

    hash_size = sh1->prop_hash_mask + 1;
    size = get_shape_size(hash_size, sh1->prop_size);
    sh_alloc = js_malloc(ctx, size);
    if (!sh_alloc)
        return NULL;
    sh_alloc1 = get_alloc_from_shape(sh1);
    memcpy(sh_alloc, sh_alloc1, size);
    sh = get_shape_from_alloc(sh_alloc, hash_size);
    sh->header.ref_count = 1;
    add_gc_object(ctx->rt, &sh->header, JS_GC_OBJ_TYPE_SHAPE);
    sh->is_hashed = FALSE;
    if (sh->proto) {
        JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, sh->proto));
    }
    for(i = 0, pr = get_shape_prop(sh); i < sh->prop_count; i++, pr++) {
        JS_DupAtom(ctx, pr->atom);
    }
    return sh;
}

static JSShape *js_dup_shape(JSShape *sh)
{
    sh->header.ref_count++;
    return sh;
}

static void js_free_shape0(JSRuntime *rt, JSShape *sh)
{
    uint32_t i;
    JSShapeProperty *pr;

    assert(sh->header.ref_count == 0);
    if (sh->is_hashed)
        js_shape_hash_unlink(rt, sh);
    if (sh->proto != NULL) {
        JS_FreeValueRT(rt, JS_MKPTR(JS_TAG_OBJECT, sh->proto));
    }
    pr = get_shape_prop(sh);
    for(i = 0; i < sh->prop_count; i++) {
        JS_FreeAtomRT(rt, pr->atom);
        pr++;
    }
    remove_gc_object(&sh->header);
    js_free_rt(rt, get_alloc_from_shape(sh));
}

static void js_free_shape(JSRuntime *rt, JSShape *sh)
{
    if (js_unlikely(--sh->header.ref_count <= 0)) {
        js_free_shape0(rt, sh);
    }
}

static void js_free_shape_null(JSRuntime *rt, JSShape *sh)
{
    if (sh)
        js_free_shape(rt, sh);
}

/* make space to hold at least 'count' properties */
static no_inline int resize_properties(JSContext *ctx, JSShape **psh,
                                       JSObject *p, uint32_t count)
{
    JSShape *sh;
    uint32_t new_size, new_hash_size, new_hash_mask, i;
    JSShapeProperty *pr;
    void *sh_alloc;
    intptr_t h;

    sh = *psh;
    new_size = max_int(count, sh->prop_size * 3 / 2);
    /* Reallocate prop array first to avoid crash or size inconsistency
       in case of memory allocation failure */
    if (p) {
        JSProperty *new_prop;
        new_prop = (JSProperty*) js_realloc(ctx, p->prop, sizeof(new_prop[0]) * new_size);
        if (js_unlikely(!new_prop))
            return -1;
        p->prop = new_prop;
    }
    new_hash_size = sh->prop_hash_mask + 1;
    while (new_hash_size < new_size)
        new_hash_size = 2 * new_hash_size;
    if (new_hash_size != (sh->prop_hash_mask + 1)) {
        JSShape *old_sh;
        /* resize the hash table and the properties */
        old_sh = sh;
        sh_alloc = js_malloc(ctx, get_shape_size(new_hash_size, new_size));
        if (!sh_alloc)
            return -1;
        sh = get_shape_from_alloc(sh_alloc, new_hash_size);
        list_del(&old_sh->header.link);
        /* copy all the fields and the properties */
        memcpy(sh, old_sh,
               sizeof(JSShape) + sizeof(sh->prop[0]) * old_sh->prop_count);
        list_add_tail(&sh->header.link, &ctx->rt->gc_obj_list);
        new_hash_mask = new_hash_size - 1;
        sh->prop_hash_mask = new_hash_mask;
        memset(prop_hash_end(sh) - new_hash_size, 0,
               sizeof(prop_hash_end(sh)[0]) * new_hash_size);
        for(i = 0, pr = sh->prop; i < sh->prop_count; i++, pr++) {
            if (pr->atom != JS_ATOM_NULL) {
                h = ((uintptr_t)pr->atom & new_hash_mask);
                pr->hash_next = prop_hash_end(sh)[-h - 1];
                prop_hash_end(sh)[-h - 1] = i + 1;
            }
        }
        js_free(ctx, get_alloc_from_shape(old_sh));
    } else {
        /* only resize the properties */
        list_del(&sh->header.link);
        sh_alloc = js_realloc(ctx, get_alloc_from_shape(sh),
                              get_shape_size(new_hash_size, new_size));
        if (js_unlikely(!sh_alloc)) {
            /* insert again in the GC list */
            list_add_tail(&sh->header.link, &ctx->rt->gc_obj_list);
            return -1;
        }
        sh = get_shape_from_alloc(sh_alloc, new_hash_size);
        list_add_tail(&sh->header.link, &ctx->rt->gc_obj_list);
    }
    *psh = sh;
    sh->prop_size = new_size;
    return 0;
}

/* remove the deleted properties. */
static int compact_properties(JSContext *ctx, JSObject *p)
{
    JSShape *sh, *old_sh;
    void *sh_alloc;
    intptr_t h;
    uint32_t new_hash_size, i, j, new_hash_mask, new_size;
    JSShapeProperty *old_pr, *pr;
    JSProperty *prop, *new_prop;

    sh = p->shape;
    assert(!sh->is_hashed);

    new_size = max_int(JS_PROP_INITIAL_SIZE,
                       sh->prop_count - sh->deleted_prop_count);
    assert(new_size <= sh->prop_size);

    new_hash_size = sh->prop_hash_mask + 1;
    while ((new_hash_size / 2) >= new_size)
        new_hash_size = new_hash_size / 2;
    new_hash_mask = new_hash_size - 1;

    /* resize the hash table and the properties */
    old_sh = sh;
    sh_alloc = js_malloc(ctx, get_shape_size(new_hash_size, new_size));
    if (!sh_alloc)
        return -1;
    sh = get_shape_from_alloc(sh_alloc, new_hash_size);
    list_del(&old_sh->header.link);
    memcpy(sh, old_sh, sizeof(JSShape));
    list_add_tail(&sh->header.link, &ctx->rt->gc_obj_list);

    memset(prop_hash_end(sh) - new_hash_size, 0,
           sizeof(prop_hash_end(sh)[0]) * new_hash_size);

    j = 0;
    old_pr = old_sh->prop;
    pr = sh->prop;
    prop = p->prop;
    for(i = 0; i < sh->prop_count; i++) {
        if (old_pr->atom != JS_ATOM_NULL) {
            pr->atom = old_pr->atom;
            pr->flags = old_pr->flags;
            h = ((uintptr_t)old_pr->atom & new_hash_mask);
            pr->hash_next = prop_hash_end(sh)[-h - 1];
            prop_hash_end(sh)[-h - 1] = j + 1;
            prop[j] = prop[i];
            j++;
            pr++;
        }
        old_pr++;
    }
    assert(j == (sh->prop_count - sh->deleted_prop_count));
    sh->prop_hash_mask = new_hash_mask;
    sh->prop_size = new_size;
    sh->deleted_prop_count = 0;
    sh->prop_count = j;

    p->shape = sh;
    js_free(ctx, get_alloc_from_shape(old_sh));

    /* reduce the size of the object properties */
    new_prop = (JSProperty*) js_realloc(ctx, p->prop, sizeof(new_prop[0]) * new_size);
    if (new_prop)
        p->prop = new_prop;
    return 0;
}

static int add_shape_property(JSContext *ctx, JSShape **psh,
                              JSObject *p, JSAtom atom, int prop_flags)
{
    JSRuntime *rt = ctx->rt;
    JSShape *sh = *psh;
    JSShapeProperty *pr, *prop;
    uint32_t hash_mask, new_shape_hash = 0;
    intptr_t h;

    /* update the shape hash */
    if (sh->is_hashed) {
        js_shape_hash_unlink(rt, sh);
        new_shape_hash = shape_hash(shape_hash(sh->hash, atom), prop_flags);
    }

    if (js_unlikely(sh->prop_count >= sh->prop_size)) {
        if (resize_properties(ctx, psh, p, sh->prop_count + 1)) {
            /* in case of error, reinsert in the hash table.
               sh is still valid if resize_properties() failed */
            if (sh->is_hashed)
                js_shape_hash_link(rt, sh);
            return -1;
        }
        sh = *psh;
    }
    if (sh->is_hashed) {
        sh->hash = new_shape_hash;
        js_shape_hash_link(rt, sh);
    }
    /* Initialize the new shape property.
       The object property at p->prop[sh->prop_count] is uninitialized */
    prop = get_shape_prop(sh);
    pr = &prop[sh->prop_count++];
    pr->atom = JS_DupAtom(ctx, atom);
    pr->flags = prop_flags;
    sh->has_small_array_index |= __JS_AtomIsTaggedInt(atom);
    /* add in hash table */
    hash_mask = sh->prop_hash_mask;
    h = atom & hash_mask;
    pr->hash_next = prop_hash_end(sh)[-h - 1];
    prop_hash_end(sh)[-h - 1] = sh->prop_count;
    return 0;
}

/* find a hashed empty shape matching the prototype. Return NULL if
   not found */
static JSShape *find_hashed_shape_proto(JSRuntime *rt, JSObject *proto)
{
    JSShape *sh1;
    uint32_t h, h1;

    h = shape_initial_hash(proto);
    h1 = get_shape_hash(h, rt->shape_hash_bits);
    for(sh1 = rt->shape_hash[h1]; sh1 != NULL; sh1 = sh1->shape_hash_next) {
        if (sh1->hash == h &&
            sh1->proto == proto &&
            sh1->prop_count == 0) {
            return sh1;
        }
    }
    return NULL;
}

/* find a hashed shape matching sh + (prop, prop_flags). Return NULL if
   not found */
static JSShape *find_hashed_shape_prop(JSRuntime *rt, JSShape *sh,
                                       JSAtom atom, int prop_flags)
{
    JSShape *sh1;
    uint32_t h, h1, i, n;

    h = sh->hash;
    h = shape_hash(h, atom);
    h = shape_hash(h, prop_flags);
    h1 = get_shape_hash(h, rt->shape_hash_bits);
    for(sh1 = rt->shape_hash[h1]; sh1 != NULL; sh1 = sh1->shape_hash_next) {
        /* we test the hash first so that the rest is done only if the
           shapes really match */
        if (sh1->hash == h &&
            sh1->proto == sh->proto &&
            sh1->prop_count == ((n = sh->prop_count) + 1)) {
            for(i = 0; i < n; i++) {
                if (js_unlikely(sh1->prop[i].atom != sh->prop[i].atom) ||
                    js_unlikely(sh1->prop[i].flags != sh->prop[i].flags))
                    goto next;
            }
            if (js_unlikely(sh1->prop[n].atom != atom) ||
                js_unlikely(sh1->prop[n].flags != prop_flags))
                goto next;
            return sh1;
        }
    next: ;
    }
    return NULL;
}

inline void JS_DumpShape(JSRuntime *rt, int i, JSShape *sh)
{
    char atom_buf[ATOM_GET_STR_BUF_SIZE];
    int j;

    /* XXX: should output readable class prototype */
    printf("%5d %3d%c %14p %5d %5d", i,
           sh->header.ref_count, " *"[sh->is_hashed],
           (void *)sh->proto, sh->prop_size, sh->prop_count);
    for(j = 0; j < sh->prop_count; j++) {
        printf(" %s", JS_AtomGetStrRT(rt, atom_buf, sizeof(atom_buf),
                                      sh->prop[j].atom));
    }
    printf("\n");
}

inline void JS_DumpShapes(JSRuntime *rt)
{
    int i;
    JSShape *sh;
    struct list_head *el;
    JSObject *p;
    JSGCObjectHeader *gp;

    printf("JSShapes: {\n");
    printf("%5s %4s %14s %5s %5s %s\n", "SLOT", "REFS", "PROTO", "SIZE", "COUNT", "PROPS");
    for(i = 0; i < rt->shape_hash_size; i++) {
        for(sh = rt->shape_hash[i]; sh != NULL; sh = sh->shape_hash_next) {
            JS_DumpShape(rt, i, sh);
            assert(sh->is_hashed);
        }
    }
    /* dump non-hashed shapes */
    list_for_each(el, &rt->gc_obj_list) {
        gp = list_entry(el, JSGCObjectHeader, link);
        if (gp->gc_obj_type == JS_GC_OBJ_TYPE_JS_OBJECT) {
            p = (JSObject *)gp;
            if (!p->shape->is_hashed) {
                JS_DumpShape(rt, -1, p->shape);
            }
        }
    }
    printf("}\n");
}

static JSValue JS_NewObjectFromShape(JSContext *ctx, JSShape *sh, JSClassID class_id)
{
    JSObject *p;

    js_trigger_gc(ctx->rt, sizeof(JSObject));
    p = (JSObject*) js_malloc(ctx, sizeof(JSObject));
    if (js_unlikely(!p))
        goto fail;
    p->class_id = class_id;
    p->extensible = TRUE;
    p->free_mark = 0;
    p->is_exotic = 0;
    p->fast_array = 0;
    p->is_constructor = 0;
    p->is_uncatchable_error = 0;
    p->tmp_mark = 0;
    p->is_HTMLDDA = 0;
    p->first_weak_ref = NULL;
    p->u.opaque = NULL;
    p->shape = sh;
    p->prop = (JSProperty*) js_malloc(ctx, sizeof(JSProperty) * sh->prop_size);
    if (js_unlikely(!p->prop)) {
        js_free(ctx, p);
    fail:
        js_free_shape(ctx->rt, sh);
        return JS_EXCEPTION;
    }

    switch(class_id) {
    case JS_CLASS_OBJECT:
        break;
    case JS_CLASS_ARRAY:
        {
            JSProperty *pr;
            p->is_exotic = 1;
            p->fast_array = 1;
            p->u.array.u.values = NULL;
            p->u.array.count = 0;
            p->u.array.u1.size = 0;
            /* the length property is always the first one */
            if (js_likely(sh == ctx->array_shape)) {
                pr = &p->prop[0];
            } else {
                /* only used for the first array */
                /* cannot fail */
                pr = add_property(ctx, p, JS_ATOM_length,
                                  JS_PROP_WRITABLE | JS_PROP_LENGTH);
            }
            pr->u.value = JS_NewInt32(ctx, 0);
        }
        break;
    case JS_CLASS_C_FUNCTION:
        p->prop[0].u.value = JS_UNDEFINED;
        break;
    case JS_CLASS_ARGUMENTS:
    case JS_CLASS_UINT8C_ARRAY:
    case JS_CLASS_INT8_ARRAY:
    case JS_CLASS_UINT8_ARRAY:
    case JS_CLASS_INT16_ARRAY:
    case JS_CLASS_UINT16_ARRAY:
    case JS_CLASS_INT32_ARRAY:
    case JS_CLASS_UINT32_ARRAY:
#ifdef CONFIG_BIGNUM
    case JS_CLASS_BIG_INT64_ARRAY:
    case JS_CLASS_BIG_UINT64_ARRAY:
#endif
    case JS_CLASS_FLOAT32_ARRAY:
    case JS_CLASS_FLOAT64_ARRAY:
        p->is_exotic = 1;
        p->fast_array = 1;
        p->u.array.u.ptr = NULL;
        p->u.array.count = 0;
        break;
    case JS_CLASS_DATAVIEW:
        p->u.array.u.ptr = NULL;
        p->u.array.count = 0;
        break;
    case JS_CLASS_NUMBER:
    case JS_CLASS_STRING:
    case JS_CLASS_BOOLEAN:
    case JS_CLASS_SYMBOL:
    case JS_CLASS_DATE:
#ifdef CONFIG_BIGNUM
    case JS_CLASS_BIG_INT:
    case JS_CLASS_BIG_FLOAT:
    case JS_CLASS_BIG_DECIMAL:
#endif
        p->u.object_data = JS_UNDEFINED;
        goto set_exotic;
    case JS_CLASS_REGEXP:
        p->u.regexp.pattern = NULL;
        p->u.regexp.bytecode = NULL;
        goto set_exotic;
    default:
    set_exotic:
        if (ctx->rt->class_array[class_id].exotic) {
            p->is_exotic = 1;
        }
        break;
    }
    p->header.ref_count = 1;
    add_gc_object(ctx->rt, &p->header, JS_GC_OBJ_TYPE_JS_OBJECT);
    return JS_MKPTR(JS_TAG_OBJECT, p);
}

static JSObject *get_proto_obj(JSValueConst proto_val)
{
    if (JS_VALUE_GET_TAG(proto_val) != JS_TAG_OBJECT)
        return NULL;
    else
        return JS_VALUE_GET_OBJ(proto_val);
}

/* WARNING: proto must be an object or JS_NULL */
inline JSValue JS_NewObjectProtoClass(JSContext *ctx, JSValueConst proto_val,
                               JSClassID class_id)
{
    JSShape *sh;
    JSObject *proto;

    proto = get_proto_obj(proto_val);
    sh = find_hashed_shape_proto(ctx->rt, proto);
    if (js_likely(sh)) {
        sh = js_dup_shape(sh);
    } else {
        sh = js_new_shape(ctx, proto);
        if (!sh)
            return JS_EXCEPTION;
    }
    return JS_NewObjectFromShape(ctx, sh, class_id);
}

#if 0
static JSValue JS_GetObjectData(JSContext *ctx, JSValueConst obj)
{
    JSObject *p;

    if (JS_VALUE_GET_TAG(obj) == JS_TAG_OBJECT) {
        p = JS_VALUE_GET_OBJ(obj);
        switch(p->class_id) {
        case JS_CLASS_NUMBER:
        case JS_CLASS_STRING:
        case JS_CLASS_BOOLEAN:
        case JS_CLASS_SYMBOL:
        case JS_CLASS_DATE:
#ifdef CONFIG_BIGNUM
        case JS_CLASS_BIG_INT:
        case JS_CLASS_BIG_FLOAT:
        case JS_CLASS_BIG_DECIMAL:
#endif
            return JS_DupValue(ctx, p->u.object_data);
        }
    }
    return JS_UNDEFINED;
}
#endif

static int JS_SetObjectData(JSContext *ctx, JSValueConst obj, JSValue val)
{
    JSObject *p;

    if (JS_VALUE_GET_TAG(obj) == JS_TAG_OBJECT) {
        p = JS_VALUE_GET_OBJ(obj);
        switch(p->class_id) {
        case JS_CLASS_NUMBER:
        case JS_CLASS_STRING:
        case JS_CLASS_BOOLEAN:
        case JS_CLASS_SYMBOL:
        case JS_CLASS_DATE:
#ifdef CONFIG_BIGNUM
        case JS_CLASS_BIG_INT:
        case JS_CLASS_BIG_FLOAT:
        case JS_CLASS_BIG_DECIMAL:
#endif
            JS_FreeValue(ctx, p->u.object_data);
            p->u.object_data = val;
            return 0;
        }
    }
    JS_FreeValue(ctx, val);
    if (!JS_IsException(obj))
        JS_ThrowTypeError(ctx, "invalid object type");
    return -1;
}

inline JSValue JS_NewObjectClass(JSContext *ctx, int class_id)
{
    return JS_NewObjectProtoClass(ctx, ctx->class_proto[class_id], class_id);
}

inline JSValue JS_NewObjectProto(JSContext *ctx, JSValueConst proto)
{
    return JS_NewObjectProtoClass(ctx, proto, JS_CLASS_OBJECT);
}

inline JSValue JS_NewArray(JSContext *ctx)
{
    return JS_NewObjectFromShape(ctx, js_dup_shape(ctx->array_shape),
                                 JS_CLASS_ARRAY);
}

inline JSValue JS_NewObject(JSContext *ctx)
{
    /* inline JS_NewObjectClass(ctx, JS_CLASS_OBJECT); */
    return JS_NewObjectProtoClass(ctx, ctx->class_proto[JS_CLASS_OBJECT], JS_CLASS_OBJECT);
}

static void js_function_set_properties(JSContext *ctx, JSValueConst func_obj,
                                       JSAtom name, int len)
{
    /* ES6 feature non compatible with ES5.1: length is configurable */
    JS_DefinePropertyValue(ctx, func_obj, JS_ATOM_length, JS_NewInt32(ctx, len),
                           JS_PROP_CONFIGURABLE);
    JS_DefinePropertyValue(ctx, func_obj, JS_ATOM_name,
                           JS_AtomToString(ctx, name), JS_PROP_CONFIGURABLE);
}

static BOOL js_class_has_bytecode(JSClassID class_id)
{
    return (class_id == JS_CLASS_BYTECODE_FUNCTION ||
            class_id == JS_CLASS_GENERATOR_FUNCTION ||
            class_id == JS_CLASS_ASYNC_FUNCTION ||
            class_id == JS_CLASS_ASYNC_GENERATOR_FUNCTION);
}

/* return NULL without exception if not a function or no bytecode */
static JSFunctionBytecode *JS_GetFunctionBytecode(JSValueConst val)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(val) != JS_TAG_OBJECT)
        return NULL;
    p = JS_VALUE_GET_OBJ(val);
    if (!js_class_has_bytecode(p->class_id))
        return NULL;
    return p->u.func.function_bytecode;
}

static void js_method_set_home_object(JSContext *ctx, JSValueConst func_obj,
                                      JSValueConst home_obj)
{
    JSObject *p, *p1;
    JSFunctionBytecode *b;

    if (JS_VALUE_GET_TAG(func_obj) != JS_TAG_OBJECT)
        return;
    p = JS_VALUE_GET_OBJ(func_obj);
    if (!js_class_has_bytecode(p->class_id))
        return;
    b = p->u.func.function_bytecode;
    if (b->need_home_object) {
        p1 = p->u.func.home_object;
        if (p1) {
            JS_FreeValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p1));
        }
        if (JS_VALUE_GET_TAG(home_obj) == JS_TAG_OBJECT)
            p1 = JS_VALUE_GET_OBJ(JS_DupValue(ctx, home_obj));
        else
            p1 = NULL;
        p->u.func.home_object = p1;
    }
}

static JSValue js_get_function_name(JSContext *ctx, JSAtom name)
{
    JSValue name_str;

    name_str = JS_AtomToString(ctx, name);
    if (JS_AtomSymbolHasDescription(ctx, name)) {
        name_str = JS_ConcatString3(ctx, "[", name_str, "]");
    }
    return name_str;
}

/* Modify the name of a method according to the atom and
   'flags'. 'flags' is a bitmask of JS_PROP_HAS_GET and
   JS_PROP_HAS_SET. Also set the home object of the method.
   Return < 0 if exception. */
static int js_method_set_properties(JSContext *ctx, JSValueConst func_obj,
                                    JSAtom name, int flags, JSValueConst home_obj)
{
    JSValue name_str;

    name_str = js_get_function_name(ctx, name);
    if (flags & JS_PROP_HAS_GET) {
        name_str = JS_ConcatString3(ctx, "get ", name_str, "");
    } else if (flags & JS_PROP_HAS_SET) {
        name_str = JS_ConcatString3(ctx, "set ", name_str, "");
    }
    if (JS_IsException(name_str))
        return -1;
    if (JS_DefinePropertyValue(ctx, func_obj, JS_ATOM_name, name_str,
                               JS_PROP_CONFIGURABLE) < 0)
        return -1;
    js_method_set_home_object(ctx, func_obj, home_obj);
    return 0;
}

/* Note: at least 'length' arguments will be readable in 'argv' */
static JSValue JS_NewCFunction3(JSContext *ctx, JSCFunction *func,
                                const char *name,
                                int length, JSCFunctionEnum cproto, int magic,
                                JSValueConst proto_val)
{
    JSValue func_obj;
    JSObject *p;
    JSAtom name_atom;

    func_obj = JS_NewObjectProtoClass(ctx, proto_val, JS_CLASS_C_FUNCTION);
    if (JS_IsException(func_obj))
        return func_obj;
    p = JS_VALUE_GET_OBJ(func_obj);
    p->u.cfunc.realm = JS_DupContext(ctx);
    p->u.cfunc.c_function.generic = func;
    p->u.cfunc.length = length;
    p->u.cfunc.cproto = cproto;
    p->u.cfunc.magic = magic;
    p->is_constructor = (cproto == JS_CFUNC_constructor ||
                         cproto == JS_CFUNC_constructor_magic ||
                         cproto == JS_CFUNC_constructor_or_func ||
                         cproto == JS_CFUNC_constructor_or_func_magic);
    if (!name)
        name = "";
    name_atom = JS_NewAtom(ctx, name);
    js_function_set_properties(ctx, func_obj, name_atom, length);
    JS_FreeAtom(ctx, name_atom);
    return func_obj;
}

/* Note: at least 'length' arguments will be readable in 'argv' */
inline JSValue JS_NewCFunction2(JSContext *ctx, JSCFunction *func,
                         const char *name,
                         int length, JSCFunctionEnum cproto, int magic)
{
    return JS_NewCFunction3(ctx, func, name, length, cproto, magic,
                            ctx->function_proto);
}

typedef struct JSCFunctionDataRecord {
    JSCFunctionData *func;
    uint8_t length;
    uint8_t data_len;
    uint16_t magic;
    JSValue data[0];
} JSCFunctionDataRecord;

static void js_c_function_data_finalizer(JSRuntime *rt, JSValue val)
{
    auto s = (JSCFunctionDataRecord*) JS_GetOpaque(val, JS_CLASS_C_FUNCTION_DATA);
    int i;

    if (s) {
        for(i = 0; i < s->data_len; i++) {
            JS_FreeValueRT(rt, s->data[i]);
        }
        js_free_rt(rt, s);
    }
}

static void js_c_function_data_mark(JSRuntime *rt, JSValueConst val,
                                    JS_MarkFunc *mark_func)
{
    auto s = (JSCFunctionDataRecord*) JS_GetOpaque(val, JS_CLASS_C_FUNCTION_DATA);
    int i;

    if (s) {
        for(i = 0; i < s->data_len; i++) {
            JS_MarkValue(rt, s->data[i], mark_func);
        }
    }
}

static JSValue js_c_function_data_call(JSContext *ctx, JSValueConst func_obj,
                                       JSValueConst this_val,
                                       int argc, JSValueConst *argv, int flags)
{
    auto s = (JSCFunctionDataRecord*) JS_GetOpaque(func_obj, JS_CLASS_C_FUNCTION_DATA);
    JSValueConst *arg_buf;
    int i;

    /* XXX: could add the function on the stack for debug */
    if (js_unlikely(argc < s->length)) {
        arg_buf = (JSValue*) alloca(sizeof(arg_buf[0]) * s->length);
        for(i = 0; i < argc; i++)
            arg_buf[i] = argv[i];
        for(i = argc; i < s->length; i++)
            arg_buf[i] = JS_UNDEFINED;
    } else {
        arg_buf = argv;
    }

    return s->func(ctx, this_val, argc, arg_buf, s->magic, s->data);
}

inline JSValue JS_NewCFunctionData(JSContext *ctx, JSCFunctionData *func,
                            int length, int magic, int data_len,
                            JSValueConst *data)
{
    JSCFunctionDataRecord *s;
    JSValue func_obj;
    int i;

    func_obj = JS_NewObjectProtoClass(ctx, ctx->function_proto,
                                      JS_CLASS_C_FUNCTION_DATA);
    if (JS_IsException(func_obj))
        return func_obj;
    s = (JSCFunctionDataRecord*) js_malloc(ctx, sizeof(*s) + data_len * sizeof(JSValue));
    if (!s) {
        JS_FreeValue(ctx, func_obj);
        return JS_EXCEPTION;
    }
    s->func = func;
    s->length = length;
    s->data_len = data_len;
    s->magic = magic;
    for(i = 0; i < data_len; i++)
        s->data[i] = JS_DupValue(ctx, data[i]);
    JS_SetOpaque(func_obj, s);
    js_function_set_properties(ctx, func_obj,
                               JS_ATOM_empty_string, length);
    return func_obj;
}

static JSContext *js_autoinit_get_realm(JSProperty *pr)
{
    return (JSContext *)(pr->u.init.realm_and_id & ~3);
}

static JSAutoInitIDEnum js_autoinit_get_id(JSProperty *pr)
{
    return (JSAutoInitIDEnum) (pr->u.init.realm_and_id & 3);
}

static void js_autoinit_free(JSRuntime *rt, JSProperty *pr)
{
    JS_FreeContext(js_autoinit_get_realm(pr));
}

static void js_autoinit_mark(JSRuntime *rt, JSProperty *pr,
                             JS_MarkFunc *mark_func)
{
    mark_func(rt, &js_autoinit_get_realm(pr)->header);
}

static void free_property(JSRuntime *rt, JSProperty *pr, int prop_flags)
{
    if (js_unlikely(prop_flags & JS_PROP_TMASK)) {
        if ((prop_flags & JS_PROP_TMASK) == JS_PROP_GETSET) {
            if (pr->u.getset.getter)
                JS_FreeValueRT(rt, JS_MKPTR(JS_TAG_OBJECT, pr->u.getset.getter));
            if (pr->u.getset.setter)
                JS_FreeValueRT(rt, JS_MKPTR(JS_TAG_OBJECT, pr->u.getset.setter));
        } else if ((prop_flags & JS_PROP_TMASK) == JS_PROP_VARREF) {
            free_var_ref(rt, pr->u.var_ref);
        } else if ((prop_flags & JS_PROP_TMASK) == JS_PROP_AUTOINIT) {
            js_autoinit_free(rt, pr);
        }
    } else {
        JS_FreeValueRT(rt, pr->u.value);
    }
}

static js_force_inline JSShapeProperty *find_own_property1(JSObject *p,
                                                        JSAtom atom)
{
    JSShape *sh;
    JSShapeProperty *pr, *prop;
    intptr_t h;
    sh = p->shape;
    h = (uintptr_t)atom & sh->prop_hash_mask;
    h = prop_hash_end(sh)[-h - 1];
    prop = get_shape_prop(sh);
    while (h) {
        pr = &prop[h - 1];
        if (js_likely(pr->atom == atom)) {
            return pr;
        }
        h = pr->hash_next;
    }
    return NULL;
}

static js_force_inline JSShapeProperty *find_own_property(JSProperty **ppr,
                                                       JSObject *p,
                                                       JSAtom atom)
{
    JSShape *sh;
    JSShapeProperty *pr, *prop;
    intptr_t h;
    sh = p->shape;
    h = (uintptr_t)atom & sh->prop_hash_mask;
    h = prop_hash_end(sh)[-h - 1];
    prop = get_shape_prop(sh);
    while (h) {
        pr = &prop[h - 1];
        if (js_likely(pr->atom == atom)) {
            *ppr = &p->prop[h - 1];
            /* the compiler should be able to assume that pr != NULL here */
            return pr;
        }
        h = pr->hash_next;
    }
    *ppr = NULL;
    return NULL;
}

/* indicate that the object may be part of a function prototype cycle */
static void set_cycle_flag(JSContext *ctx, JSValueConst obj)
{
}

static void free_var_ref(JSRuntime *rt, JSVarRef *var_ref)
{
    if (var_ref) {
        assert(var_ref->header.ref_count > 0);
        if (--var_ref->header.ref_count == 0) {
            if (var_ref->is_detached) {
                JS_FreeValueRT(rt, var_ref->value);
                remove_gc_object(&var_ref->header);
            } else {
                list_del(&var_ref->header.link); /* still on the stack */
            }
            js_free_rt(rt, var_ref);
        }
    }
}

static void js_array_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    int i;

    for(i = 0; i < p->u.array.count; i++) {
        JS_FreeValueRT(rt, p->u.array.u.values[i]);
    }
    js_free_rt(rt, p->u.array.u.values);
}

static void js_array_mark(JSRuntime *rt, JSValueConst val,
                          JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    int i;

    for(i = 0; i < p->u.array.count; i++) {
        JS_MarkValue(rt, p->u.array.u.values[i], mark_func);
    }
}

static void js_object_data_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JS_FreeValueRT(rt, p->u.object_data);
    p->u.object_data = JS_UNDEFINED;
}

static void js_object_data_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JS_MarkValue(rt, p->u.object_data, mark_func);
}

static void js_c_function_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);

    if (p->u.cfunc.realm)
        JS_FreeContext(p->u.cfunc.realm);
}

static void js_c_function_mark(JSRuntime *rt, JSValueConst val,
                               JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);

    if (p->u.cfunc.realm)
        mark_func(rt, &p->u.cfunc.realm->header);
}

static void js_bytecode_function_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p1, *p = JS_VALUE_GET_OBJ(val);
    JSFunctionBytecode *b;
    JSVarRef **var_refs;
    int i;

    p1 = p->u.func.home_object;
    if (p1) {
        JS_FreeValueRT(rt, JS_MKPTR(JS_TAG_OBJECT, p1));
    }
    b = p->u.func.function_bytecode;
    if (b) {
        var_refs = p->u.func.var_refs;
        if (var_refs) {
            for(i = 0; i < b->closure_var_count; i++)
                free_var_ref(rt, var_refs[i]);
            js_free_rt(rt, var_refs);
        }
        JS_FreeValueRT(rt, JS_MKPTR(JS_TAG_FUNCTION_BYTECODE, b));
    }
}

static void js_bytecode_function_mark(JSRuntime *rt, JSValueConst val,
                                      JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSVarRef **var_refs = p->u.func.var_refs;
    JSFunctionBytecode *b = p->u.func.function_bytecode;
    int i;

    if (p->u.func.home_object) {
        JS_MarkValue(rt, JS_MKPTR(JS_TAG_OBJECT, p->u.func.home_object),
                     mark_func);
    }
    if (b) {
        if (var_refs) {
            for(i = 0; i < b->closure_var_count; i++) {
                JSVarRef *var_ref = var_refs[i];
                if (var_ref && var_ref->is_detached) {
                    mark_func(rt, &var_ref->header);
                }
            }
        }
        /* must mark the function bytecode because template objects may be
           part of a cycle */
        JS_MarkValue(rt, JS_MKPTR(JS_TAG_FUNCTION_BYTECODE, b), mark_func);
    }
}

static void js_bound_function_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSBoundFunction *bf = p->u.bound_function;
    int i;

    JS_FreeValueRT(rt, bf->func_obj);
    JS_FreeValueRT(rt, bf->this_val);
    for(i = 0; i < bf->argc; i++) {
        JS_FreeValueRT(rt, bf->argv[i]);
    }
    js_free_rt(rt, bf);
}

static void js_bound_function_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSBoundFunction *bf = p->u.bound_function;
    int i;

    JS_MarkValue(rt, bf->func_obj, mark_func);
    JS_MarkValue(rt, bf->this_val, mark_func);
    for(i = 0; i < bf->argc; i++)
        JS_MarkValue(rt, bf->argv[i], mark_func);
}

static void js_for_in_iterator_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSForInIterator *it = p->u.for_in_iterator;
    JS_FreeValueRT(rt, it->obj);
    js_free_rt(rt, it);
}

static void js_for_in_iterator_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSForInIterator *it = p->u.for_in_iterator;
    JS_MarkValue(rt, it->obj, mark_func);
}

static void free_object(JSRuntime *rt, JSObject *p)
{
    int i;
    JSClassFinalizer *finalizer;
    JSShape *sh;
    JSShapeProperty *pr;

    p->free_mark = 1; /* used to tell the object is invalid when
                         freeing cycles */
    /* free all the fields */
    sh = p->shape;
    pr = get_shape_prop(sh);
    for(i = 0; i < sh->prop_count; i++) {
        free_property(rt, &p->prop[i], pr->flags);
        pr++;
    }
    js_free_rt(rt, p->prop);
    /* as an optimization we destroy the shape immediately without
       putting it in gc_zero_ref_count_list */
    js_free_shape(rt, sh);

    /* fail safe */
    p->shape = NULL;
    p->prop = NULL;

    if (js_unlikely(p->first_weak_ref)) {
        reset_weak_ref(rt, p);
    }

    finalizer = rt->class_array[p->class_id].finalizer;
    if (finalizer)
        (*finalizer)(rt, JS_MKPTR(JS_TAG_OBJECT, p));

    /* fail safe */
    p->class_id = 0;
    p->u.opaque = NULL;
    p->u.func.var_refs = NULL;
    p->u.func.home_object = NULL;

    remove_gc_object(&p->header);
    if (rt->gc_phase == JS_GC_PHASE_REMOVE_CYCLES && p->header.ref_count != 0) {
        list_add_tail(&p->header.link, &rt->gc_zero_ref_count_list);
    } else {
        js_free_rt(rt, p);
    }
}

static void free_gc_object(JSRuntime *rt, JSGCObjectHeader *gp)
{
    switch(gp->gc_obj_type) {
    case JS_GC_OBJ_TYPE_JS_OBJECT:
        free_object(rt, (JSObject *)gp);
        break;
    case JS_GC_OBJ_TYPE_FUNCTION_BYTECODE:
        free_function_bytecode(rt, (JSFunctionBytecode *)gp);
        break;
    default:
        abort();
    }
}

static void free_zero_refcount(JSRuntime *rt)
{
    struct list_head *el;
    JSGCObjectHeader *p;

    rt->gc_phase = JS_GC_PHASE_DECREF;
    for(;;) {
        el = rt->gc_zero_ref_count_list.next;
        if (el == &rt->gc_zero_ref_count_list)
            break;
        p = list_entry(el, JSGCObjectHeader, link);
        assert(p->ref_count == 0);
        free_gc_object(rt, p);
    }
    rt->gc_phase = JS_GC_PHASE_NONE;
}

/* called with the ref_count of 'v' reaches zero. */
inline void __JS_FreeValueRT(JSRuntime *rt, JSValue v)
{
    uint32_t tag = JS_VALUE_GET_TAG(v);

#ifdef DUMP_FREE
    {
        printf("Freeing ");
        if (tag == JS_TAG_OBJECT) {
            JS_DumpObject(rt, JS_VALUE_GET_OBJ(v));
        } else {
            JS_DumpValueShort(rt, v);
            printf("\n");
        }
    }
#endif

    switch(tag) {
    case JS_TAG_STRING:
        {
            JSString *p = JS_VALUE_GET_STRING(v);
            if (p->atom_type) {
                JS_FreeAtomStruct(rt, p);
            } else {
#ifdef DUMP_LEAKS
                list_del(&p->link);
#endif
                js_free_rt(rt, p);
            }
        }
        break;
    case JS_TAG_OBJECT:
    case JS_TAG_FUNCTION_BYTECODE:
        {
            auto p = (JSGCObjectHeader*) JS_VALUE_GET_PTR(v);
            if (rt->gc_phase != JS_GC_PHASE_REMOVE_CYCLES) {
                list_del(&p->link);
                list_add(&p->link, &rt->gc_zero_ref_count_list);
                if (rt->gc_phase == JS_GC_PHASE_NONE) {
                    free_zero_refcount(rt);
                }
            }
        }
        break;
    case JS_TAG_MODULE:
        abort(); /* never freed here */
        break;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *bf = JS_VALUE_GET_PTR(v);
            bf_delete(&bf->num);
            js_free_rt(rt, bf);
        }
        break;
    case JS_TAG_BIG_DECIMAL:
        {
            JSBigDecimal *bf = JS_VALUE_GET_PTR(v);
            bfdec_delete(&bf->num);
            js_free_rt(rt, bf);
        }
        break;
#endif
    case JS_TAG_SYMBOL:
        {
            auto p = (JSAtomStruct*) JS_VALUE_GET_PTR(v);
            JS_FreeAtomStruct(rt, p);
        }
        break;
    default:
        printf("__JS_FreeValue: unknown tag=%d\n", tag);
        abort();
    }
}

inline void __JS_FreeValue(JSContext *ctx, JSValue v)
{
    __JS_FreeValueRT(ctx->rt, v);
}

/* garbage collection */

static void add_gc_object(JSRuntime *rt, JSGCObjectHeader *h,
                          JSGCObjectTypeEnum type)
{
    h->mark = 0;
    h->gc_obj_type = type;
    list_add_tail(&h->link, &rt->gc_obj_list);
}

static void remove_gc_object(JSGCObjectHeader *h)
{
    list_del(&h->link);
}

inline void JS_MarkValue(JSRuntime *rt, JSValueConst val, JS_MarkFunc *mark_func)
{
    if (JS_VALUE_HAS_REF_COUNT(val)) {
        switch(JS_VALUE_GET_TAG(val)) {
        case JS_TAG_OBJECT:
        case JS_TAG_FUNCTION_BYTECODE:
            mark_func(rt, (JSGCObjectHeader*) JS_VALUE_GET_PTR(val));
            break;
        default:
            break;
        }
    }
}

static void mark_children(JSRuntime *rt, JSGCObjectHeader *gp,
                          JS_MarkFunc *mark_func)
{
    switch(gp->gc_obj_type) {
    case JS_GC_OBJ_TYPE_JS_OBJECT:
        {
            JSObject *p = (JSObject *)gp;
            JSShapeProperty *prs;
            JSShape *sh;
            int i;
            sh = p->shape;
            mark_func(rt, &sh->header);
            /* mark all the fields */
            prs = get_shape_prop(sh);
            for(i = 0; i < sh->prop_count; i++) {
                JSProperty *pr = &p->prop[i];
                if (prs->atom != JS_ATOM_NULL) {
                    if (prs->flags & JS_PROP_TMASK) {
                        if ((prs->flags & JS_PROP_TMASK) == JS_PROP_GETSET) {
                            if (pr->u.getset.getter)
                                mark_func(rt, &pr->u.getset.getter->header);
                            if (pr->u.getset.setter)
                                mark_func(rt, &pr->u.getset.setter->header);
                        } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_VARREF) {
                            if (pr->u.var_ref->is_detached) {
                                /* Note: the tag does not matter
                                   provided it is a GC object */
                                mark_func(rt, &pr->u.var_ref->header);
                            }
                        } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_AUTOINIT) {
                            js_autoinit_mark(rt, pr, mark_func);
                        }
                    } else {
                        JS_MarkValue(rt, pr->u.value, mark_func);
                    }
                }
                prs++;
            }

            if (p->class_id != JS_CLASS_OBJECT) {
                JSClassGCMark *gc_mark;
                gc_mark = rt->class_array[p->class_id].gc_mark;
                if (gc_mark)
                    gc_mark(rt, JS_MKPTR(JS_TAG_OBJECT, p), mark_func);
            }
        }
        break;
    case JS_GC_OBJ_TYPE_FUNCTION_BYTECODE:
        /* the template objects can be part of a cycle */
        {
            JSFunctionBytecode *b = (JSFunctionBytecode *)gp;
            int i;
            for(i = 0; i < b->cpool_count; i++) {
                JS_MarkValue(rt, b->cpool[i], mark_func);
            }
            if (b->realm)
                mark_func(rt, &b->realm->header);
        }
        break;
    case JS_GC_OBJ_TYPE_VAR_REF:
        {
            JSVarRef *var_ref = (JSVarRef *)gp;
            /* only detached variable referenced are taken into account */
            assert(var_ref->is_detached);
            JS_MarkValue(rt, *var_ref->pvalue, mark_func);
        }
        break;
    case JS_GC_OBJ_TYPE_ASYNC_FUNCTION:
        {
            JSAsyncFunctionData *s = (JSAsyncFunctionData *)gp;
            if (s->is_active)
                async_func_mark(rt, &s->func_state, mark_func);
            JS_MarkValue(rt, s->resolving_funcs[0], mark_func);
            JS_MarkValue(rt, s->resolving_funcs[1], mark_func);
        }
        break;
    case JS_GC_OBJ_TYPE_SHAPE:
        {
            JSShape *sh = (JSShape *)gp;
            if (sh->proto != NULL) {
                mark_func(rt, &sh->proto->header);
            }
        }
        break;
    case JS_GC_OBJ_TYPE_JS_CONTEXT:
        {
            JSContext *ctx = (JSContext *)gp;
            JS_MarkContext(rt, ctx, mark_func);
        }
        break;
    default:
        abort();
    }
}

static void gc_decref_child(JSRuntime *rt, JSGCObjectHeader *p)
{
    assert(p->ref_count > 0);
    p->ref_count--;
    if (p->ref_count == 0 && p->mark == 1) {
        list_del(&p->link);
        list_add_tail(&p->link, &rt->tmp_obj_list);
    }
}

static void gc_decref(JSRuntime *rt)
{
    struct list_head *el, *el1;
    JSGCObjectHeader *p;

    init_list_head(&rt->tmp_obj_list);

    /* decrement the refcount of all the children of all the GC
       objects and move the GC objects with zero refcount to
       tmp_obj_list */
    list_for_each_safe(el, el1, &rt->gc_obj_list) {
        p = list_entry(el, JSGCObjectHeader, link);
        assert(p->mark == 0);
        mark_children(rt, p, gc_decref_child);
        p->mark = 1;
        if (p->ref_count == 0) {
            list_del(&p->link);
            list_add_tail(&p->link, &rt->tmp_obj_list);
        }
    }
}

static void gc_scan_incref_child(JSRuntime *rt, JSGCObjectHeader *p)
{
    p->ref_count++;
    if (p->ref_count == 1) {
        /* ref_count was 0: remove from tmp_obj_list and add at the
           end of gc_obj_list */
        list_del(&p->link);
        list_add_tail(&p->link, &rt->gc_obj_list);
        p->mark = 0; /* reset the mark for the next GC call */
    }
}

static void gc_scan_incref_child2(JSRuntime *rt, JSGCObjectHeader *p)
{
    p->ref_count++;
}

static void gc_scan(JSRuntime *rt)
{
    struct list_head *el;
    JSGCObjectHeader *p;

    /* keep the objects with a refcount > 0 and their children. */
    list_for_each(el, &rt->gc_obj_list) {
        p = list_entry(el, JSGCObjectHeader, link);
        assert(p->ref_count > 0);
        p->mark = 0; /* reset the mark for the next GC call */
        mark_children(rt, p, gc_scan_incref_child);
    }

    /* restore the refcount of the objects to be deleted. */
    list_for_each(el, &rt->tmp_obj_list) {
        p = list_entry(el, JSGCObjectHeader, link);
        mark_children(rt, p, gc_scan_incref_child2);
    }
}

static void gc_free_cycles(JSRuntime *rt)
{
    struct list_head *el, *el1;
    JSGCObjectHeader *p;
#ifdef DUMP_GC_FREE
    BOOL header_done = FALSE;
#endif

    rt->gc_phase = JS_GC_PHASE_REMOVE_CYCLES;

    for(;;) {
        el = rt->tmp_obj_list.next;
        if (el == &rt->tmp_obj_list)
            break;
        p = list_entry(el, JSGCObjectHeader, link);
        /* Only need to free the GC object associated with JS
           values. The rest will be automatically removed because they
           must be referenced by them. */
        switch(p->gc_obj_type) {
        case JS_GC_OBJ_TYPE_JS_OBJECT:
        case JS_GC_OBJ_TYPE_FUNCTION_BYTECODE:
#ifdef DUMP_GC_FREE
            if (!header_done) {
                printf("Freeing cycles:\n");
                JS_DumpObjectHeader(rt);
                header_done = TRUE;
            }
            JS_DumpGCObject(rt, p);
#endif
            free_gc_object(rt, p);
            break;
        default:
            list_del(&p->link);
            list_add_tail(&p->link, &rt->gc_zero_ref_count_list);
            break;
        }
    }
    rt->gc_phase = JS_GC_PHASE_NONE;

    list_for_each_safe(el, el1, &rt->gc_zero_ref_count_list) {
        p = list_entry(el, JSGCObjectHeader, link);
        assert(p->gc_obj_type == JS_GC_OBJ_TYPE_JS_OBJECT ||
               p->gc_obj_type == JS_GC_OBJ_TYPE_FUNCTION_BYTECODE);
        js_free_rt(rt, p);
    }

    init_list_head(&rt->gc_zero_ref_count_list);
}

inline void JS_RunGC(JSRuntime *rt)
{
    /* decrement the reference of the children of each object. mark =
       1 after this pass. */
    gc_decref(rt);

    /* keep the GC objects with a non zero refcount and their childs */
    gc_scan(rt);

    /* free the GC objects in a cycle */
    gc_free_cycles(rt);
}

/* Return false if not an object or if the object has already been
   freed (zombie objects are visible in finalizers when freeing
   cycles). */
inline BOOL JS_IsLiveObject(JSRuntime *rt, JSValueConst obj)
{
    JSObject *p;
    if (!JS_IsObject(obj))
        return FALSE;
    p = JS_VALUE_GET_OBJ(obj);
    return !p->free_mark;
}

/* Compute memory used by various object types */
/* XXX: poor man's approach to handling multiply referenced objects */
typedef struct JSMemoryUsage_helper {
    double memory_used_count;
    double str_count;
    double str_size;
    int64_t js_func_count;
    double js_func_size;
    int64_t js_func_code_size;
    int64_t js_func_pc2line_count;
    int64_t js_func_pc2line_size;
} JSMemoryUsage_helper;

static void compute_value_size(JSValueConst val, JSMemoryUsage_helper *hp);

static void compute_jsstring_size(JSString *str, JSMemoryUsage_helper *hp)
{
    if (!str->atom_type) {  /* atoms are handled separately */
        double s_ref_count = str->header.ref_count;
        hp->str_count += 1 / s_ref_count;
        hp->str_size += ((sizeof(*str) + (str->len << str->is_wide_char) +
                          1 - str->is_wide_char) / s_ref_count);
    }
}

static void compute_bytecode_size(JSFunctionBytecode *b, JSMemoryUsage_helper *hp)
{
    int memory_used_count, js_func_size, i;

    memory_used_count = 0;
    js_func_size = offsetof(JSFunctionBytecode, debug);
    if (b->vardefs) {
        js_func_size += (b->arg_count + b->var_count) * sizeof(*b->vardefs);
    }
    if (b->cpool) {
        js_func_size += b->cpool_count * sizeof(*b->cpool);
        for (i = 0; i < b->cpool_count; i++) {
            JSValueConst val = b->cpool[i];
            compute_value_size(val, hp);
        }
    }
    if (b->closure_var) {
        js_func_size += b->closure_var_count * sizeof(*b->closure_var);
    }
    if (!b->read_only_bytecode && b->byte_code_buf) {
        hp->js_func_code_size += b->byte_code_len;
    }
    if (b->has_debug) {
        js_func_size += sizeof(*b) - offsetof(JSFunctionBytecode, debug);
        if (b->debug.source) {
            memory_used_count++;
            js_func_size += b->debug.source_len + 1;
        }
        if (b->debug.pc2line_len) {
            memory_used_count++;
            hp->js_func_pc2line_count += 1;
            hp->js_func_pc2line_size += b->debug.pc2line_len;
        }
    }
    hp->js_func_size += js_func_size;
    hp->js_func_count += 1;
    hp->memory_used_count += memory_used_count;
}

static void compute_value_size(JSValueConst val, JSMemoryUsage_helper *hp)
{
    switch(JS_VALUE_GET_TAG(val)) {
    case JS_TAG_STRING:
        compute_jsstring_size(JS_VALUE_GET_STRING(val), hp);
        break;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
    case JS_TAG_BIG_FLOAT:
    case JS_TAG_BIG_DECIMAL:
        /* should track JSBigFloat usage */
        break;
#endif
    }
}

inline void JS_ComputeMemoryUsage(JSRuntime *rt, JSMemoryUsage *s)
{
    struct list_head *el, *el1;
    int i;
    JSMemoryUsage_helper mem = { 0 }, *hp = &mem;

    memset(s, 0, sizeof(*s));
    s->malloc_count = rt->malloc_state.malloc_count;
    s->malloc_size = rt->malloc_state.malloc_size;
    s->malloc_limit = rt->malloc_state.malloc_limit;

    s->memory_used_count = 2; /* rt + rt->class_array */
    s->memory_used_size = sizeof(JSRuntime) + sizeof(JSValue) * rt->class_count;

    list_for_each(el, &rt->context_list) {
        JSContext *ctx = list_entry(el, JSContext, link);
        JSShape *sh = ctx->array_shape;
        s->memory_used_count += 2; /* ctx + ctx->class_proto */
        s->memory_used_size += sizeof(JSContext) +
            sizeof(JSValue) * rt->class_count;
        s->binary_object_count += ctx->binary_object_count;
        s->binary_object_size += ctx->binary_object_size;

        /* the hashed shapes are counted separately */
        if (sh && !sh->is_hashed) {
            int hash_size = sh->prop_hash_mask + 1;
            s->shape_count++;
            s->shape_size += get_shape_size(hash_size, sh->prop_size);
        }
        list_for_each(el1, &ctx->loaded_modules) {
            JSModuleDef *m = list_entry(el1, JSModuleDef, link);
            s->memory_used_count += 1;
            s->memory_used_size += sizeof(*m);
            if (m->req_module_entries) {
                s->memory_used_count += 1;
                s->memory_used_size += m->req_module_entries_count * sizeof(*m->req_module_entries);
            }
            if (m->export_entries) {
                s->memory_used_count += 1;
                s->memory_used_size += m->export_entries_count * sizeof(*m->export_entries);
                for (i = 0; i < m->export_entries_count; i++) {
                    JSExportEntry *me = &m->export_entries[i];
                    if (me->export_type == JS_EXPORT_TYPE_LOCAL && me->u.local.var_ref) {
                        /* potential multiple count */
                        s->memory_used_count += 1;
                        compute_value_size(me->u.local.var_ref->value, hp);
                    }
                }
            }
            if (m->star_export_entries) {
                s->memory_used_count += 1;
                s->memory_used_size += m->star_export_entries_count * sizeof(*m->star_export_entries);
            }
            if (m->import_entries) {
                s->memory_used_count += 1;
                s->memory_used_size += m->import_entries_count * sizeof(*m->import_entries);
            }
            compute_value_size(m->module_ns, hp);
            compute_value_size(m->func_obj, hp);
        }
    }

    list_for_each(el, &rt->gc_obj_list) {
        JSGCObjectHeader *gp = list_entry(el, JSGCObjectHeader, link);
        JSObject *p;
        JSShape *sh;
        JSShapeProperty *prs;

        /* XXX: could count the other GC object types too */
        if (gp->gc_obj_type == JS_GC_OBJ_TYPE_FUNCTION_BYTECODE) {
            compute_bytecode_size((JSFunctionBytecode *)gp, hp);
            continue;
        } else if (gp->gc_obj_type != JS_GC_OBJ_TYPE_JS_OBJECT) {
            continue;
        }
        p = (JSObject *)gp;
        sh = p->shape;
        s->obj_count++;
        if (p->prop) {
            s->memory_used_count++;
            s->prop_size += sh->prop_size * sizeof(*p->prop);
            s->prop_count += sh->prop_count;
            prs = get_shape_prop(sh);
            for(i = 0; i < sh->prop_count; i++) {
                JSProperty *pr = &p->prop[i];
                if (prs->atom != JS_ATOM_NULL && !(prs->flags & JS_PROP_TMASK)) {
                    compute_value_size(pr->u.value, hp);
                }
                prs++;
            }
        }
        /* the hashed shapes are counted separately */
        if (!sh->is_hashed) {
            int hash_size = sh->prop_hash_mask + 1;
            s->shape_count++;
            s->shape_size += get_shape_size(hash_size, sh->prop_size);
        }

        switch(p->class_id) {
        case JS_CLASS_ARRAY:             /* u.array | length */
        case JS_CLASS_ARGUMENTS:         /* u.array | length */
            s->array_count++;
            if (p->fast_array) {
                s->fast_array_count++;
                if (p->u.array.u.values) {
                    s->memory_used_count++;
                    s->memory_used_size += p->u.array.count *
                        sizeof(*p->u.array.u.values);
                    s->fast_array_elements += p->u.array.count;
                    for (i = 0; i < p->u.array.count; i++) {
                        compute_value_size(p->u.array.u.values[i], hp);
                    }
                }
            }
            break;
        case JS_CLASS_NUMBER:            /* u.object_data */
        case JS_CLASS_STRING:            /* u.object_data */
        case JS_CLASS_BOOLEAN:           /* u.object_data */
        case JS_CLASS_SYMBOL:            /* u.object_data */
        case JS_CLASS_DATE:              /* u.object_data */
#ifdef CONFIG_BIGNUM
        case JS_CLASS_BIG_INT:           /* u.object_data */
        case JS_CLASS_BIG_FLOAT:         /* u.object_data */
        case JS_CLASS_BIG_DECIMAL:         /* u.object_data */
#endif
            compute_value_size(p->u.object_data, hp);
            break;
        case JS_CLASS_C_FUNCTION:        /* u.cfunc */
            s->c_func_count++;
            break;
        case JS_CLASS_BYTECODE_FUNCTION: /* u.func */
            {
                JSFunctionBytecode *b = p->u.func.function_bytecode;
                JSVarRef **var_refs = p->u.func.var_refs;
                /* home_object: object will be accounted for in list scan */
                if (var_refs) {
                    s->memory_used_count++;
                    s->js_func_size += b->closure_var_count * sizeof(*var_refs);
                    for (i = 0; i < b->closure_var_count; i++) {
                        if (var_refs[i]) {
                            double ref_count = var_refs[i]->header.ref_count;
                            s->memory_used_count += 1 / ref_count;
                            s->js_func_size += sizeof(*var_refs[i]) / ref_count;
                            /* handle non object closed values */
                            if (var_refs[i]->pvalue == &var_refs[i]->value) {
                                /* potential multiple count */
                                compute_value_size(var_refs[i]->value, hp);
                            }
                        }
                    }
                }
            }
            break;
        case JS_CLASS_BOUND_FUNCTION:    /* u.bound_function */
            {
                JSBoundFunction *bf = p->u.bound_function;
                /* func_obj and this_val are objects */
                for (i = 0; i < bf->argc; i++) {
                    compute_value_size(bf->argv[i], hp);
                }
                s->memory_used_count += 1;
                s->memory_used_size += sizeof(*bf) + bf->argc * sizeof(*bf->argv);
            }
            break;
        case JS_CLASS_C_FUNCTION_DATA:   /* u.c_function_data_record */
            {
                JSCFunctionDataRecord *fd = p->u.c_function_data_record;
                if (fd) {
                    for (i = 0; i < fd->data_len; i++) {
                        compute_value_size(fd->data[i], hp);
                    }
                    s->memory_used_count += 1;
                    s->memory_used_size += sizeof(*fd) + fd->data_len * sizeof(*fd->data);
                }
            }
            break;
        case JS_CLASS_REGEXP:            /* u.regexp */
            compute_jsstring_size(p->u.regexp.pattern, hp);
            compute_jsstring_size(p->u.regexp.bytecode, hp);
            break;

        case JS_CLASS_FOR_IN_ITERATOR:   /* u.for_in_iterator */
            {
                JSForInIterator *it = p->u.for_in_iterator;
                if (it) {
                    compute_value_size(it->obj, hp);
                    s->memory_used_count += 1;
                    s->memory_used_size += sizeof(*it);
                }
            }
            break;
        case JS_CLASS_ARRAY_BUFFER:      /* u.array_buffer */
        case JS_CLASS_SHARED_ARRAY_BUFFER: /* u.array_buffer */
            {
                JSArrayBuffer *abuf = p->u.array_buffer;
                if (abuf) {
                    s->memory_used_count += 1;
                    s->memory_used_size += sizeof(*abuf);
                    if (abuf->data) {
                        s->memory_used_count += 1;
                        s->memory_used_size += abuf->byte_length;
                    }
                }
            }
            break;
        case JS_CLASS_GENERATOR:         /* u.generator_data */
        case JS_CLASS_UINT8C_ARRAY:      /* u.typed_array / u.array */
        case JS_CLASS_INT8_ARRAY:        /* u.typed_array / u.array */
        case JS_CLASS_UINT8_ARRAY:       /* u.typed_array / u.array */
        case JS_CLASS_INT16_ARRAY:       /* u.typed_array / u.array */
        case JS_CLASS_UINT16_ARRAY:      /* u.typed_array / u.array */
        case JS_CLASS_INT32_ARRAY:       /* u.typed_array / u.array */
        case JS_CLASS_UINT32_ARRAY:      /* u.typed_array / u.array */
#ifdef CONFIG_BIGNUM
        case JS_CLASS_BIG_INT64_ARRAY:   /* u.typed_array / u.array */
        case JS_CLASS_BIG_UINT64_ARRAY:  /* u.typed_array / u.array */
#endif
        case JS_CLASS_FLOAT32_ARRAY:     /* u.typed_array / u.array */
        case JS_CLASS_FLOAT64_ARRAY:     /* u.typed_array / u.array */
        case JS_CLASS_DATAVIEW:          /* u.typed_array */
#ifdef CONFIG_BIGNUM
        case JS_CLASS_FLOAT_ENV:         /* u.float_env */
#endif
        case JS_CLASS_MAP:               /* u.map_state */
        case JS_CLASS_SET:               /* u.map_state */
        case JS_CLASS_WEAKMAP:           /* u.map_state */
        case JS_CLASS_WEAKSET:           /* u.map_state */
        case JS_CLASS_MAP_ITERATOR:      /* u.map_iterator_data */
        case JS_CLASS_SET_ITERATOR:      /* u.map_iterator_data */
        case JS_CLASS_ARRAY_ITERATOR:    /* u.array_iterator_data */
        case JS_CLASS_STRING_ITERATOR:   /* u.array_iterator_data */
        case JS_CLASS_PROXY:             /* u.proxy_data */
        case JS_CLASS_PROMISE:           /* u.promise_data */
        case JS_CLASS_PROMISE_RESOLVE_FUNCTION:  /* u.promise_function_data */
        case JS_CLASS_PROMISE_REJECT_FUNCTION:   /* u.promise_function_data */
        case JS_CLASS_ASYNC_FUNCTION_RESOLVE:    /* u.async_function_data */
        case JS_CLASS_ASYNC_FUNCTION_REJECT:     /* u.async_function_data */
        case JS_CLASS_ASYNC_FROM_SYNC_ITERATOR:  /* u.async_from_sync_iterator_data */
        case JS_CLASS_ASYNC_GENERATOR:   /* u.async_generator_data */
            /* TODO */
        default:
            /* XXX: class definition should have an opaque block size */
            if (p->u.opaque) {
                s->memory_used_count += 1;
            }
            break;
        }
    }
    s->obj_size += s->obj_count * sizeof(JSObject);

    /* hashed shapes */
    s->memory_used_count++; /* rt->shape_hash */
    s->memory_used_size += sizeof(rt->shape_hash[0]) * rt->shape_hash_size;
    for(i = 0; i < rt->shape_hash_size; i++) {
        JSShape *sh;
        for(sh = rt->shape_hash[i]; sh != NULL; sh = sh->shape_hash_next) {
            int hash_size = sh->prop_hash_mask + 1;
            s->shape_count++;
            s->shape_size += get_shape_size(hash_size, sh->prop_size);
        }
    }

    /* atoms */
    s->memory_used_count += 2; /* rt->atom_array, rt->atom_hash */
    s->atom_count = rt->atom_count;
    s->atom_size = sizeof(rt->atom_array[0]) * rt->atom_size +
        sizeof(rt->atom_hash[0]) * rt->atom_hash_size;
    for(i = 0; i < rt->atom_size; i++) {
        JSAtomStruct *p = rt->atom_array[i];
        if (!atom_is_free(p)) {
            s->atom_size += (sizeof(*p) + (p->len << p->is_wide_char) +
                             1 - p->is_wide_char);
        }
    }
    s->str_count = round(mem.str_count);
    s->str_size = round(mem.str_size);
    s->js_func_count = mem.js_func_count;
    s->js_func_size = round(mem.js_func_size);
    s->js_func_code_size = mem.js_func_code_size;
    s->js_func_pc2line_count = mem.js_func_pc2line_count;
    s->js_func_pc2line_size = mem.js_func_pc2line_size;
    s->memory_used_count += round(mem.memory_used_count) +
        s->atom_count + s->str_count +
        s->obj_count + s->shape_count +
        s->js_func_count + s->js_func_pc2line_count;
    s->memory_used_size += s->atom_size + s->str_size +
        s->obj_size + s->prop_size + s->shape_size +
        s->js_func_size + s->js_func_code_size + s->js_func_pc2line_size;
}

inline void JS_DumpMemoryUsage(FILE *fp, const JSMemoryUsage *s, JSRuntime *rt)
{
    fprintf(fp, "QuickJS memory usage -- "
#ifdef CONFIG_BIGNUM
            "BigNum "
#endif
            CONFIG_VERSION " version, %d-bit, malloc limit: %" PRId64 "\n\n",
            (int)sizeof(void *) * 8, (int64_t)s->malloc_limit);
#if 1
    if (rt) {
        static const struct {
            const char *name;
            size_t size;
        } object_types[] = {
            { "JSRuntime", sizeof(JSRuntime) },
            { "JSContext", sizeof(JSContext) },
            { "JSObject", sizeof(JSObject) },
            { "JSString", sizeof(JSString) },
            { "JSFunctionBytecode", sizeof(JSFunctionBytecode) },
        };
        int i, usage_size_ok = 0;
        for(i = 0; i < countof(object_types); i++) {
            unsigned int size = object_types[i].size;
            void *p = js_malloc_rt(rt, size);
            if (p) {
                unsigned int size1 = js_malloc_usable_size_rt(rt, p);
                if (size1 >= size) {
                    usage_size_ok = 1;
                    fprintf(fp, "  %3u + %-2u  %s\n",
                            size, size1 - size, object_types[i].name);
                }
                js_free_rt(rt, p);
            }
        }
        if (!usage_size_ok) {
            fprintf(fp, "  malloc_usable_size unavailable\n");
        }
        {
            int obj_classes[JS_CLASS_INIT_COUNT + 1] = { 0 };
            int class_id;
            struct list_head *el;
            list_for_each(el, &rt->gc_obj_list) {
                JSGCObjectHeader *gp = list_entry(el, JSGCObjectHeader, link);
                JSObject *p;
                if (gp->gc_obj_type == JS_GC_OBJ_TYPE_JS_OBJECT) {
                    p = (JSObject *)gp;
                    obj_classes[min_uint32(p->class_id, JS_CLASS_INIT_COUNT)]++;
                }
            }
            fprintf(fp, "\n" "JSObject classes\n");
            if (obj_classes[0])
                fprintf(fp, "  %5d  %2.0d %s\n", obj_classes[0], 0, "none");
            for (class_id = 1; class_id < JS_CLASS_INIT_COUNT; class_id++) {
                if (obj_classes[class_id]) {
                    char buf[ATOM_GET_STR_BUF_SIZE];
                    fprintf(fp, "  %5d  %2.0d %s\n", obj_classes[class_id], class_id,
                            JS_AtomGetStrRT(rt, buf, sizeof(buf), js_std_class_def[class_id - 1].class_name));
                }
            }
            if (obj_classes[JS_CLASS_INIT_COUNT])
                fprintf(fp, "  %5d  %2.0d %s\n", obj_classes[JS_CLASS_INIT_COUNT], 0, "other");
        }
        fprintf(fp, "\n");
    }
#endif
    fprintf(fp, "%-20s %8s %8s\n", "NAME", "COUNT", "SIZE");

    if (s->malloc_count) {
        fprintf(fp, "%-20s %8" PRId64 " %8" PRId64 "  (%0.1f per block)\n",
                "memory allocated", s->malloc_count, s->malloc_size,
                (double)s->malloc_size / s->malloc_count);
        fprintf(fp, "%-20s %8" PRId64 " %8" PRId64 "  (%d overhead, %0.1f average slack)\n",
                "memory used", s->memory_used_count, s->memory_used_size,
                MALLOC_OVERHEAD, ((double)(s->malloc_size - s->memory_used_size) /
                                  s->memory_used_count));
    }
    if (s->atom_count) {
        fprintf(fp, "%-20s %8" PRId64 " %8" PRId64 "  (%0.1f per atom)\n",
                "atoms", s->atom_count, s->atom_size,
                (double)s->atom_size / s->atom_count);
    }
    if (s->str_count) {
        fprintf(fp, "%-20s %8" PRId64 " %8" PRId64 "  (%0.1f per string)\n",
                "strings", s->str_count, s->str_size,
                (double)s->str_size / s->str_count);
    }
    if (s->obj_count) {
        fprintf(fp, "%-20s %8" PRId64 " %8" PRId64 "  (%0.1f per object)\n",
                "objects", s->obj_count, s->obj_size,
                (double)s->obj_size / s->obj_count);
        fprintf(fp, "%-20s %8" PRId64 " %8" PRId64 "  (%0.1f per object)\n",
                "  properties", s->prop_count, s->prop_size,
                (double)s->prop_count / s->obj_count);
        fprintf(fp, "%-20s %8" PRId64 " %8" PRId64 "  (%0.1f per shape)\n",
                "  shapes", s->shape_count, s->shape_size,
                (double)s->shape_size / s->shape_count);
    }
    if (s->js_func_count) {
        fprintf(fp, "%-20s %8" PRId64 " %8" PRId64 "\n",
                "bytecode functions", s->js_func_count, s->js_func_size);
        fprintf(fp, "%-20s %8" PRId64 " %8" PRId64 "  (%0.1f per function)\n",
                "  bytecode", s->js_func_count, s->js_func_code_size,
                (double)s->js_func_code_size / s->js_func_count);
        if (s->js_func_pc2line_count) {
            fprintf(fp, "%-20s %8" PRId64 " %8" PRId64 "  (%0.1f per function)\n",
                    "  pc2line", s->js_func_pc2line_count,
                    s->js_func_pc2line_size,
                    (double)s->js_func_pc2line_size / s->js_func_pc2line_count);
        }
    }
    if (s->c_func_count) {
        fprintf(fp, "%-20s %8" PRId64 "\n", "C functions", s->c_func_count);
    }
    if (s->array_count) {
        fprintf(fp, "%-20s %8" PRId64 "\n", "arrays", s->array_count);
        if (s->fast_array_count) {
            fprintf(fp, "%-20s %8" PRId64 "\n", "  fast arrays", s->fast_array_count);
            fprintf(fp, "%-20s %8" PRId64 " %8" PRId64 "  (%0.1f per fast array)\n",
                    "  elements", s->fast_array_elements,
                    s->fast_array_elements * (int)sizeof(JSValue),
                    (double)s->fast_array_elements / s->fast_array_count);
        }
    }
    if (s->binary_object_count) {
        fprintf(fp, "%-20s %8" PRId64 " %8" PRId64 "\n",
                "binary objects", s->binary_object_count, s->binary_object_size);
    }
}

inline JSValue JS_GetGlobalObject(JSContext *ctx)
{
    return JS_DupValue(ctx, ctx->global_obj);
}

/* WARNING: obj is freed */
inline JSValue JS_Throw(JSContext *ctx, JSValue obj)
{
    JSRuntime *rt = ctx->rt;
    JS_FreeValue(ctx, rt->current_exception);
    rt->current_exception = obj;
    return JS_EXCEPTION;
}

/* return the pending exception (cannot be called twice). */
inline JSValue JS_GetException(JSContext *ctx)
{
    JSValue val;
    JSRuntime *rt = ctx->rt;
    val = rt->current_exception;
    rt->current_exception = JS_NULL;
    return val;
}

static void dbuf_put_leb128(DynBuf *s, uint32_t v)
{
    uint32_t a;
    for(;;) {
        a = v & 0x7f;
        v >>= 7;
        if (v != 0) {
            dbuf_putc(s, a | 0x80);
        } else {
            dbuf_putc(s, a);
            break;
        }
    }
}

static void dbuf_put_sleb128(DynBuf *s, int32_t v1)
{
    uint32_t v = v1;
    dbuf_put_leb128(s, (2 * v) ^ -(v >> 31));
}

static int get_leb128(uint32_t *pval, const uint8_t *buf,
                      const uint8_t *buf_end)
{
    const uint8_t *ptr = buf;
    uint32_t v, a, i;
    v = 0;
    for(i = 0; i < 5; i++) {
        if (js_unlikely(ptr >= buf_end))
            break;
        a = *ptr++;
        v |= (a & 0x7f) << (i * 7);
        if (!(a & 0x80)) {
            *pval = v;
            return ptr - buf;
        }
    }
    *pval = 0;
    return -1;
}

static int get_sleb128(int32_t *pval, const uint8_t *buf,
                       const uint8_t *buf_end)
{
    int ret;
    uint32_t val;
    ret = get_leb128(&val, buf, buf_end);
    if (ret < 0) {
        *pval = 0;
        return -1;
    }
    *pval = (val >> 1) ^ -(val & 1);
    return ret;
}

static int find_line_num(JSContext *ctx, JSFunctionBytecode *b,
                         uint32_t pc_value)
{
    const uint8_t *p_end, *p;
    int new_line_num, line_num, pc, v, ret;
    unsigned int op;

    if (!b->has_debug || !b->debug.pc2line_buf) {
        /* function was stripped */
        return -1;
    }

    p = b->debug.pc2line_buf;
    p_end = p + b->debug.pc2line_len;
    pc = 0;
    line_num = b->debug.line_num;
    while (p < p_end) {
        op = *p++;
        if (op == 0) {
            uint32_t val;
            ret = get_leb128(&val, p, p_end);
            if (ret < 0)
                goto fail;
            pc += val;
            p += ret;
            ret = get_sleb128(&v, p, p_end);
            if (ret < 0) {
            fail:
                /* should never happen */
                return b->debug.line_num;
            }
            p += ret;
            new_line_num = line_num + v;
        } else {
            op -= PC2LINE_OP_FIRST;
            pc += (op / PC2LINE_RANGE);
            new_line_num = line_num + (op % PC2LINE_RANGE) + PC2LINE_BASE;
        }
        if (pc_value < pc)
            return line_num;
        line_num = new_line_num;
    }
    return line_num;
}

/* in order to avoid executing arbitrary code during the stack trace
   generation, we only look at simple 'name' properties containing a
   string. */
static const char *get_func_name(JSContext *ctx, JSValueConst func)
{
    JSProperty *pr;
    JSShapeProperty *prs;
    JSValueConst val;

    if (JS_VALUE_GET_TAG(func) != JS_TAG_OBJECT)
        return NULL;
    prs = find_own_property(&pr, JS_VALUE_GET_OBJ(func), JS_ATOM_name);
    if (!prs)
        return NULL;
    if ((prs->flags & JS_PROP_TMASK) != JS_PROP_NORMAL)
        return NULL;
    val = pr->u.value;
    if (JS_VALUE_GET_TAG(val) != JS_TAG_STRING)
        return NULL;
    return JS_ToCString(ctx, val);
}

#define JS_BACKTRACE_FLAG_SKIP_FIRST_LEVEL (1 << 0)
/* only taken into account if filename is provided */
#define JS_BACKTRACE_FLAG_SINGLE_LEVEL     (1 << 1)

/* if filename != NULL, an additional level is added with the filename
   and line number information (used for parse error). */
static void build_backtrace(JSContext *ctx, JSValueConst error_obj,
                            const char *filename, int line_num,
                            int backtrace_flags)
{
    JSStackFrame *sf;
    JSValue str;
    DynBuf dbuf;
    const char *func_name_str;
    const char *str1;
    JSObject *p;
    BOOL backtrace_barrier;

    js_dbuf_init(ctx, &dbuf);
    if (filename) {
        dbuf_printf(&dbuf, "    at %s", filename);
        if (line_num != -1)
            dbuf_printf(&dbuf, ":%d", line_num);
        dbuf_putc(&dbuf, '\n');
        str = JS_NewString(ctx, filename);
        JS_DefinePropertyValue(ctx, error_obj, JS_ATOM_fileName, str,
                               JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
        JS_DefinePropertyValue(ctx, error_obj, JS_ATOM_lineNumber, JS_NewInt32(ctx, line_num),
                               JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
        if (backtrace_flags & JS_BACKTRACE_FLAG_SINGLE_LEVEL)
            goto done;
    }
    for(sf = ctx->rt->current_stack_frame; sf != NULL; sf = sf->prev_frame) {
        if (backtrace_flags & JS_BACKTRACE_FLAG_SKIP_FIRST_LEVEL) {
            backtrace_flags &= ~JS_BACKTRACE_FLAG_SKIP_FIRST_LEVEL;
            continue;
        }
        func_name_str = get_func_name(ctx, sf->cur_func);
        if (!func_name_str || func_name_str[0] == '\0')
            str1 = "<anonymous>";
        else
            str1 = func_name_str;
        dbuf_printf(&dbuf, "    at %s", str1);
        JS_FreeCString(ctx, func_name_str);

        p = JS_VALUE_GET_OBJ(sf->cur_func);
        backtrace_barrier = FALSE;
        if (js_class_has_bytecode(p->class_id)) {
            JSFunctionBytecode *b;
            const char *atom_str;
            int line_num1;

            b = p->u.func.function_bytecode;
            backtrace_barrier = b->backtrace_barrier;
            if (b->has_debug) {
                line_num1 = find_line_num(ctx, b,
                                          sf->cur_pc - b->byte_code_buf - 1);
                atom_str = JS_AtomToCString(ctx, b->debug.filename);
                dbuf_printf(&dbuf, " (%s",
                            atom_str ? atom_str : "<null>");
                JS_FreeCString(ctx, atom_str);
                if (line_num1 != -1)
                    dbuf_printf(&dbuf, ":%d", line_num1);
                dbuf_putc(&dbuf, ')');
            }
        } else {
            dbuf_printf(&dbuf, " (native)");
        }
        dbuf_putc(&dbuf, '\n');
        /* stop backtrace if JS_EVAL_FLAG_BACKTRACE_BARRIER was used */
        if (backtrace_barrier)
            break;
    }
 done:
    dbuf_putc(&dbuf, '\0');
    if (dbuf_error(&dbuf))
        str = JS_NULL;
    else
        str = JS_NewString(ctx, (char *)dbuf.buf);
    dbuf_free(&dbuf);
    JS_DefinePropertyValue(ctx, error_obj, JS_ATOM_stack, str,
                           JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
}

/* Note: it is important that no exception is returned by this function */
static BOOL is_backtrace_needed(JSContext *ctx, JSValueConst obj)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return FALSE;
    p = JS_VALUE_GET_OBJ(obj);
    if (p->class_id != JS_CLASS_ERROR)
        return FALSE;
    if (find_own_property1(p, JS_ATOM_stack))
        return FALSE;
    return TRUE;
}

inline JSValue JS_NewError(JSContext *ctx)
{
    return JS_NewObjectClass(ctx, JS_CLASS_ERROR);
}

static JSValue JS_ThrowError2(JSContext *ctx, JSErrorEnum error_num,
                              const char *fmt, va_list ap, BOOL add_backtrace)
{
    char buf[256];
    JSValue obj, ret;

    vsnprintf(buf, sizeof(buf), fmt, ap);
    obj = JS_NewObjectProtoClass(ctx, ctx->native_error_proto[error_num],
                                 JS_CLASS_ERROR);
    if (js_unlikely(JS_IsException(obj))) {
        /* out of memory: throw JS_NULL to avoid recursing */
        obj = JS_NULL;
    } else {
        JS_DefinePropertyValue(ctx, obj, JS_ATOM_message,
                               JS_NewString(ctx, buf),
                               JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
    }
    if (add_backtrace) {
        build_backtrace(ctx, obj, NULL, 0, 0);
    }
    ret = JS_Throw(ctx, obj);
    return ret;
}

static JSValue JS_ThrowError(JSContext *ctx, JSErrorEnum error_num,
                             const char *fmt, va_list ap)
{
    JSRuntime *rt = ctx->rt;
    JSStackFrame *sf;
    BOOL add_backtrace;

    /* the backtrace is added later if called from a bytecode function */
    sf = rt->current_stack_frame;
    add_backtrace = !rt->in_out_of_memory &&
        (!sf || (JS_GetFunctionBytecode(sf->cur_func) == NULL));
    return JS_ThrowError2(ctx, error_num, fmt, ap, add_backtrace);
}

inline JSValue JS_ThrowSyntaxError(JSContext *ctx, const char *fmt, ...)
{
    JSValue val;
    va_list ap;

    va_start(ap, fmt);
    val = JS_ThrowError(ctx, JS_SYNTAX_ERROR, fmt, ap);
    va_end(ap);
    return val;
}

inline JSValue JS_ThrowTypeError(JSContext *ctx, const char *fmt, ...)
{
    JSValue val;
    va_list ap;

    va_start(ap, fmt);
    val = JS_ThrowError(ctx, JS_TYPE_ERROR, fmt, ap);
    va_end(ap);
    return val;
}

static int JS_ThrowTypeErrorOrFalse(JSContext *ctx, int flags, const char *fmt, ...)
{
    va_list ap;

    if ((flags & JS_PROP_THROW) ||
        ((flags & JS_PROP_THROW_STRICT) && is_strict_mode(ctx))) {
        va_start(ap, fmt);
        JS_ThrowError(ctx, JS_TYPE_ERROR, fmt, ap);
        va_end(ap);
        return -1;
    } else {
        return FALSE;
    }
}

/* never use it directly */
static JSValue __JS_ThrowTypeErrorAtom(JSContext *ctx, JSAtom atom, const char *fmt, ...)
{
    char buf[ATOM_GET_STR_BUF_SIZE];
    return JS_ThrowTypeError(ctx, fmt,
                             JS_AtomGetStr(ctx, buf, sizeof(buf), atom));
}

/* never use it directly */
static JSValue __JS_ThrowSyntaxErrorAtom(JSContext *ctx, JSAtom atom, const char *fmt, ...)
{
    char buf[ATOM_GET_STR_BUF_SIZE];
    return JS_ThrowSyntaxError(ctx, fmt,
                             JS_AtomGetStr(ctx, buf, sizeof(buf), atom));
}

/* %s is replaced by 'atom'. The macro is used so that gcc can check
    the format string. */
#define JS_ThrowTypeErrorAtom(ctx, fmt, atom) __JS_ThrowTypeErrorAtom(ctx, atom, fmt, "")
#define JS_ThrowSyntaxErrorAtom(ctx, fmt, atom) __JS_ThrowSyntaxErrorAtom(ctx, atom, fmt, "")

static int JS_ThrowTypeErrorReadOnly(JSContext *ctx, int flags, JSAtom atom)
{
    if ((flags & JS_PROP_THROW) ||
        ((flags & JS_PROP_THROW_STRICT) && is_strict_mode(ctx))) {
        JS_ThrowTypeErrorAtom(ctx, "'%s' is read-only", atom);
        return -1;
    } else {
        return FALSE;
    }
}

inline JSValue JS_ThrowReferenceError(JSContext *ctx, const char *fmt, ...)
{
    JSValue val;
    va_list ap;

    va_start(ap, fmt);
    val = JS_ThrowError(ctx, JS_REFERENCE_ERROR, fmt, ap);
    va_end(ap);
    return val;
}

inline JSValue JS_ThrowRangeError(JSContext *ctx, const char *fmt, ...)
{
    JSValue val;
    va_list ap;

    va_start(ap, fmt);
    val = JS_ThrowError(ctx, JS_RANGE_ERROR, fmt, ap);
    va_end(ap);
    return val;
}

inline JSValue JS_ThrowInternalError(JSContext *ctx, const char *fmt, ...)
{
    JSValue val;
    va_list ap;

    va_start(ap, fmt);
    val = JS_ThrowError(ctx, JS_INTERNAL_ERROR, fmt, ap);
    va_end(ap);
    return val;
}

inline JSValue JS_ThrowOutOfMemory(JSContext *ctx)
{
    JSRuntime *rt = ctx->rt;
    if (!rt->in_out_of_memory) {
        rt->in_out_of_memory = TRUE;
        JS_ThrowInternalError(ctx, "out of memory");
        rt->in_out_of_memory = FALSE;
    }
    return JS_EXCEPTION;
}

static JSValue JS_ThrowStackOverflow(JSContext *ctx)
{
    return JS_ThrowInternalError(ctx, "stack overflow");
}

static JSValue JS_ThrowTypeErrorNotAnObject(JSContext *ctx)
{
    return JS_ThrowTypeError(ctx, "not an object");
}

static JSValue JS_ThrowTypeErrorNotASymbol(JSContext *ctx)
{
    return JS_ThrowTypeError(ctx, "not a symbol");
}

static JSValue JS_ThrowReferenceErrorNotDefined(JSContext *ctx, JSAtom name)
{
    char buf[ATOM_GET_STR_BUF_SIZE];
    return JS_ThrowReferenceError(ctx, "'%s' is not defined",
                                  JS_AtomGetStr(ctx, buf, sizeof(buf), name));
}

static JSValue JS_ThrowReferenceErrorUninitialized(JSContext *ctx, JSAtom name)
{
    char buf[ATOM_GET_STR_BUF_SIZE];
    return JS_ThrowReferenceError(ctx, "%s is not initialized",
                                  name == JS_ATOM_NULL ? "lexical variable" :
                                  JS_AtomGetStr(ctx, buf, sizeof(buf), name));
}

static JSValue JS_ThrowReferenceErrorUninitialized2(JSContext *ctx,
                                                    JSFunctionBytecode *b,
                                                    int idx, BOOL is_ref)
{
    JSAtom atom = JS_ATOM_NULL;
    if (is_ref) {
        atom = b->closure_var[idx].var_name;
    } else {
        /* not present if the function is stripped and contains no eval() */
        if (b->vardefs)
            atom = b->vardefs[b->arg_count + idx].var_name;
    }
    return JS_ThrowReferenceErrorUninitialized(ctx, atom);
}

static JSValue JS_ThrowTypeErrorInvalidClass(JSContext *ctx, int class_id)
{
    JSRuntime *rt = ctx->rt;
    JSAtom name;
    name = rt->class_array[class_id].class_name;
    return JS_ThrowTypeErrorAtom(ctx, "%s object expected", name);
}

[[nodiscard]] static no_inline int __js_poll_interrupts(JSContext *ctx)
{
    JSRuntime *rt = ctx->rt;
    ctx->interrupt_counter = JS_INTERRUPT_COUNTER_INIT;
    if (rt->interrupt_handler) {
        if (rt->interrupt_handler(rt, rt->interrupt_opaque)) {
            /* XXX: should set a specific flag to avoid catching */
            JS_ThrowInternalError(ctx, "interrupted");
            JS_SetUncatchableError(ctx, ctx->rt->current_exception, TRUE);
            return -1;
        }
    }
    return 0;
}

[[nodiscard]] static inline int js_poll_interrupts(JSContext *ctx)
{
    if (js_unlikely(--ctx->interrupt_counter <= 0)) {
        return __js_poll_interrupts(ctx);
    } else {
        return 0;
    }
}

/* return -1 (exception) or TRUE/FALSE */
static int JS_SetPrototypeInternal(JSContext *ctx, JSValueConst obj,
                                   JSValueConst proto_val,
                                   BOOL throw_flag)
{
    JSObject *proto, *p, *p1;
    JSShape *sh;

    if (throw_flag) {
        if (JS_VALUE_GET_TAG(obj) == JS_TAG_NULL ||
            JS_VALUE_GET_TAG(obj) == JS_TAG_UNDEFINED)
            goto not_obj;
    } else {
        if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
            goto not_obj;
    }
    p = JS_VALUE_GET_OBJ(obj);
    if (JS_VALUE_GET_TAG(proto_val) != JS_TAG_OBJECT) {
        if (JS_VALUE_GET_TAG(proto_val) != JS_TAG_NULL) {
        not_obj:
            JS_ThrowTypeErrorNotAnObject(ctx);
            return -1;
        }
        proto = NULL;
    } else {
        proto = JS_VALUE_GET_OBJ(proto_val);
    }

    if (throw_flag && JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return TRUE;

    if (js_unlikely(p->class_id == JS_CLASS_PROXY))
        return js_proxy_setPrototypeOf(ctx, obj, proto_val, throw_flag);
    sh = p->shape;
    if (sh->proto == proto)
        return TRUE;
    if (!p->extensible) {
        if (throw_flag) {
            JS_ThrowTypeError(ctx, "object is not extensible");
            return -1;
        } else {
            return FALSE;
        }
    }
    if (proto) {
        /* check if there is a cycle */
        p1 = proto;
        do {
            if (p1 == p) {
                if (throw_flag) {
                    JS_ThrowTypeError(ctx, "circular prototype chain");
                    return -1;
                } else {
                    return FALSE;
                }
            }
            /* Note: for Proxy objects, proto is NULL */
            p1 = p1->shape->proto;
        } while (p1 != NULL);
        JS_DupValue(ctx, proto_val);
    }

    if (js_shape_prepare_update(ctx, p, NULL))
        return -1;
    sh = p->shape;
    if (sh->proto)
        JS_FreeValue(ctx, JS_MKPTR(JS_TAG_OBJECT, sh->proto));
    sh->proto = proto;
    return TRUE;
}

/* return -1 (exception) or TRUE/FALSE */
inline int JS_SetPrototype(JSContext *ctx, JSValueConst obj, JSValueConst proto_val)
{
    return JS_SetPrototypeInternal(ctx, obj, proto_val, TRUE);
}

/* Only works for primitive types, otherwise return JS_NULL. */
static JSValueConst JS_GetPrototypePrimitive(JSContext *ctx, JSValueConst val)
{
    switch(JS_VALUE_GET_NORM_TAG(val)) {
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
        val = ctx->class_proto[JS_CLASS_BIG_INT];
        break;
    case JS_TAG_BIG_FLOAT:
        val = ctx->class_proto[JS_CLASS_BIG_FLOAT];
        break;
    case JS_TAG_BIG_DECIMAL:
        val = ctx->class_proto[JS_CLASS_BIG_DECIMAL];
        break;
#endif
    case JS_TAG_INT:
    case JS_TAG_FLOAT64:
        val = ctx->class_proto[JS_CLASS_NUMBER];
        break;
    case JS_TAG_BOOL:
        val = ctx->class_proto[JS_CLASS_BOOLEAN];
        break;
    case JS_TAG_STRING:
        val = ctx->class_proto[JS_CLASS_STRING];
        break;
    case JS_TAG_SYMBOL:
        val = ctx->class_proto[JS_CLASS_SYMBOL];
        break;
    case JS_TAG_OBJECT:
    case JS_TAG_NULL:
    case JS_TAG_UNDEFINED:
    default:
        val = JS_NULL;
        break;
    }
    return val;
}

/* Return an Object, JS_NULL or JS_EXCEPTION in case of Proxy object. */
inline JSValue JS_GetPrototype(JSContext *ctx, JSValueConst obj)
{
    JSValue val;
    if (JS_VALUE_GET_TAG(obj) == JS_TAG_OBJECT) {
        JSObject *p;
        p = JS_VALUE_GET_OBJ(obj);
        if (js_unlikely(p->class_id == JS_CLASS_PROXY)) {
            val = js_proxy_getPrototypeOf(ctx, obj);
        } else {
            p = p->shape->proto;
            if (!p)
                val = JS_NULL;
            else
                val = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p));
        }
    } else {
        val = JS_DupValue(ctx, JS_GetPrototypePrimitive(ctx, obj));
    }
    return val;
}

static JSValue JS_GetPrototypeFree(JSContext *ctx, JSValue obj)
{
    JSValue obj1;
    obj1 = JS_GetPrototype(ctx, obj);
    JS_FreeValue(ctx, obj);
    return obj1;
}

/* return TRUE, FALSE or (-1) in case of exception */
static int JS_OrdinaryIsInstanceOf(JSContext *ctx, JSValueConst val,
                                   JSValueConst obj)
{
    JSValue obj_proto;
    JSObject *proto;
    const JSObject *p, *proto1;
    BOOL ret;

    if (!JS_IsFunction(ctx, obj))
        return FALSE;
    p = JS_VALUE_GET_OBJ(obj);
    if (p->class_id == JS_CLASS_BOUND_FUNCTION) {
        JSBoundFunction *s = p->u.bound_function;
        return JS_IsInstanceOf(ctx, val, s->func_obj);
    }

    /* Only explicitly boxed values are instances of constructors */
    if (JS_VALUE_GET_TAG(val) != JS_TAG_OBJECT)
        return FALSE;
    obj_proto = JS_GetProperty(ctx, obj, JS_ATOM_prototype);
    if (JS_VALUE_GET_TAG(obj_proto) != JS_TAG_OBJECT) {
        if (!JS_IsException(obj_proto))
            JS_ThrowTypeError(ctx, "operand 'prototype' property is not an object");
        ret = -1;
        goto done;
    }
    proto = JS_VALUE_GET_OBJ(obj_proto);
    p = JS_VALUE_GET_OBJ(val);
    for(;;) {
        proto1 = p->shape->proto;
        if (!proto1) {
            /* slow case if proxy in the prototype chain */
            if (js_unlikely(p->class_id == JS_CLASS_PROXY)) {
                JSValue obj1;
                obj1 = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, (JSObject *)p));
                for(;;) {
                    obj1 = JS_GetPrototypeFree(ctx, obj1);
                    if (JS_IsException(obj1)) {
                        ret = -1;
                        break;
                    }
                    if (JS_IsNull(obj1)) {
                        ret = FALSE;
                        break;
                    }
                    if (proto == JS_VALUE_GET_OBJ(obj1)) {
                        JS_FreeValue(ctx, obj1);
                        ret = TRUE;
                        break;
                    }
                    /* must check for timeout to avoid infinite loop */
                    if (js_poll_interrupts(ctx)) {
                        JS_FreeValue(ctx, obj1);
                        ret = -1;
                        break;
                    }
                }
            } else {
                ret = FALSE;
            }
            break;
        }
        p = proto1;
        if (proto == p) {
            ret = TRUE;
            break;
        }
    }
done:
    JS_FreeValue(ctx, obj_proto);
    return ret;
}

/* return TRUE, FALSE or (-1) in case of exception */
inline int JS_IsInstanceOf(JSContext *ctx, JSValueConst val, JSValueConst obj)
{
    JSValue method;

    if (!JS_IsObject(obj))
        goto fail;
    method = JS_GetProperty(ctx, obj, JS_ATOM_Symbol_hasInstance);
    if (JS_IsException(method))
        return -1;
    if (!JS_IsNull(method) && !JS_IsUndefined(method)) {
        JSValue ret;
        ret = JS_CallFree(ctx, method, obj, 1, &val);
        return JS_ToBoolFree(ctx, ret);
    }

    /* legacy case */
    if (!JS_IsFunction(ctx, obj)) {
    fail:
        JS_ThrowTypeError(ctx, "invalid 'instanceof' right operand");
        return -1;
    }
    return JS_OrdinaryIsInstanceOf(ctx, val, obj);
}

/* return the value associated to the autoinit property or an exception */
typedef JSValue JSAutoInitFunc(JSContext *ctx, JSObject *p, JSAtom atom, void *opaque);

static JSAutoInitFunc *js_autoinit_func_table[] = {
    js_instantiate_prototype, /* JS_AUTOINIT_ID_PROTOTYPE */
    js_module_ns_autoinit, /* JS_AUTOINIT_ID_MODULE_NS */
    JS_InstantiateFunctionListItem2, /* JS_AUTOINIT_ID_PROP */
};

/* warning: 'prs' is reallocated after it */
static int JS_AutoInitProperty(JSContext *ctx, JSObject *p, JSAtom prop,
                               JSProperty *pr, JSShapeProperty *prs)
{
    JSValue val;
    JSContext *realm;
    JSAutoInitFunc *func;

    if (js_shape_prepare_update(ctx, p, &prs))
        return -1;

    realm = js_autoinit_get_realm(pr);
    func = js_autoinit_func_table[js_autoinit_get_id(pr)];
    /* 'func' shall not modify the object properties 'pr' */
    val = func(realm, p, prop, pr->u.init.opaque);
    js_autoinit_free(ctx->rt, pr);
    prs->flags &= ~JS_PROP_TMASK;
    pr->u.value = JS_UNDEFINED;
    if (JS_IsException(val))
        return -1;
    pr->u.value = val;
    return 0;
}

inline JSValue JS_GetPropertyInternal(JSContext *ctx, JSValueConst obj,
                               JSAtom prop, JSValueConst this_obj,
                               BOOL throw_ref_error)
{
    JSObject *p;
    JSProperty *pr;
    JSShapeProperty *prs;
    uint32_t tag;

    tag = JS_VALUE_GET_TAG(obj);
    if (js_unlikely(tag != JS_TAG_OBJECT)) {
        switch(tag) {
        case JS_TAG_NULL:
            return JS_ThrowTypeErrorAtom(ctx, "cannot read property '%s' of null", prop);
        case JS_TAG_UNDEFINED:
            return JS_ThrowTypeErrorAtom(ctx, "cannot read property '%s' of undefined", prop);
        case JS_TAG_EXCEPTION:
            return JS_EXCEPTION;
        case JS_TAG_STRING:
            {
                JSString *p1 = JS_VALUE_GET_STRING(obj);
                if (__JS_AtomIsTaggedInt(prop)) {
                    uint32_t idx, ch;
                    idx = __JS_AtomToUInt32(prop);
                    if (idx < p1->len) {
                        if (p1->is_wide_char)
                            ch = p1->u.str16[idx];
                        else
                            ch = p1->u.str8[idx];
                        return js_new_string_char(ctx, ch);
                    }
                } else if (prop == JS_ATOM_length) {
                    return JS_NewInt32(ctx, p1->len);
                }
            }
            break;
        default:
            break;
        }
        /* cannot raise an exception */
        p = JS_VALUE_GET_OBJ(JS_GetPrototypePrimitive(ctx, obj));
        if (!p)
            return JS_UNDEFINED;
    } else {
        p = JS_VALUE_GET_OBJ(obj);
    }

    for(;;) {
        prs = find_own_property(&pr, p, prop);
        if (prs) {
            /* found */
            if (js_unlikely(prs->flags & JS_PROP_TMASK)) {
                if ((prs->flags & JS_PROP_TMASK) == JS_PROP_GETSET) {
                    if (js_unlikely(!pr->u.getset.getter)) {
                        return JS_UNDEFINED;
                    } else {
                        JSValue func = JS_MKPTR(JS_TAG_OBJECT, pr->u.getset.getter);
                        /* Note: the field could be removed in the getter */
                        func = JS_DupValue(ctx, func);
                        return JS_CallFree(ctx, func, this_obj, 0, NULL);
                    }
                } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_VARREF) {
                    JSValue val = *pr->u.var_ref->pvalue;
                    if (js_unlikely(JS_IsUninitialized(val)))
                        return JS_ThrowReferenceErrorUninitialized(ctx, prs->atom);
                    return JS_DupValue(ctx, val);
                } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_AUTOINIT) {
                    /* Instantiate property and retry */
                    if (JS_AutoInitProperty(ctx, p, prop, pr, prs))
                        return JS_EXCEPTION;
                    continue;
                }
            } else {
                return JS_DupValue(ctx, pr->u.value);
            }
        }
        if (js_unlikely(p->is_exotic)) {
            /* exotic behaviors */
            if (p->fast_array) {
                if (__JS_AtomIsTaggedInt(prop)) {
                    uint32_t idx = __JS_AtomToUInt32(prop);
                    if (idx < p->u.array.count) {
                        /* we avoid duplicating the code */
                        return JS_GetPropertyUint32(ctx, JS_MKPTR(JS_TAG_OBJECT, p), idx);
                    } else if (p->class_id >= JS_CLASS_UINT8C_ARRAY &&
                               p->class_id <= JS_CLASS_FLOAT64_ARRAY) {
                        return JS_UNDEFINED;
                    }
                } else if (p->class_id >= JS_CLASS_UINT8C_ARRAY &&
                           p->class_id <= JS_CLASS_FLOAT64_ARRAY) {
                    int ret;
                    ret = JS_AtomIsNumericIndex(ctx, prop);
                    if (ret != 0) {
                        if (ret < 0)
                            return JS_EXCEPTION;
                        return JS_UNDEFINED;
                    }
                }
            } else {
                const JSClassExoticMethods *em = ctx->rt->class_array[p->class_id].exotic;
                if (em) {
                    if (em->get_property) {
                        JSValue obj1, retval;
                        /* XXX: should pass throw_ref_error */
                        /* Note: if 'p' is a prototype, it can be
                           freed in the called function */
                        obj1 = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p));
                        retval = em->get_property(ctx, obj1, prop, this_obj);
                        JS_FreeValue(ctx, obj1);
                        return retval;
                    }
                    if (em->get_own_property) {
                        JSPropertyDescriptor desc;
                        int ret;
                        JSValue obj1;

                        /* Note: if 'p' is a prototype, it can be
                           freed in the called function */
                        obj1 = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p));
                        ret = em->get_own_property(ctx, &desc, obj1, prop);
                        JS_FreeValue(ctx, obj1);
                        if (ret < 0)
                            return JS_EXCEPTION;
                        if (ret) {
                            if (desc.flags & JS_PROP_GETSET) {
                                JS_FreeValue(ctx, desc.setter);
                                return JS_CallFree(ctx, desc.getter, this_obj, 0, NULL);
                            } else {
                                return desc.value;
                            }
                        }
                    }
                }
            }
        }
        p = p->shape->proto;
        if (!p)
            break;
    }
    if (js_unlikely(throw_ref_error)) {
        return JS_ThrowReferenceErrorNotDefined(ctx, prop);
    } else {
        return JS_UNDEFINED;
    }
}

static JSValue JS_ThrowTypeErrorPrivateNotFound(JSContext *ctx, JSAtom atom)
{
    return JS_ThrowTypeErrorAtom(ctx, "private class field '%s' does not exist",
                                 atom);
}

/* Private fields can be added even on non extensible objects or
   Proxies */
static int JS_DefinePrivateField(JSContext *ctx, JSValueConst obj,
                                 JSValueConst name, JSValue val)
{
    JSObject *p;
    JSShapeProperty *prs;
    JSProperty *pr;
    JSAtom prop;

    if (js_unlikely(JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)) {
        JS_ThrowTypeErrorNotAnObject(ctx);
        goto fail;
    }
    /* safety check */
    if (js_unlikely(JS_VALUE_GET_TAG(name) != JS_TAG_SYMBOL)) {
        JS_ThrowTypeErrorNotASymbol(ctx);
        goto fail;
    }
    prop = js_symbol_to_atom(ctx, (JSValue)name);
    p = JS_VALUE_GET_OBJ(obj);
    prs = find_own_property(&pr, p, prop);
    if (prs) {
        JS_ThrowTypeErrorAtom(ctx, "private class field '%s' already exists",
                              prop);
        goto fail;
    }
    pr = add_property(ctx, p, prop, JS_PROP_C_W_E);
    if (js_unlikely(!pr)) {
    fail:
        JS_FreeValue(ctx, val);
        return -1;
    }
    pr->u.value = val;
    return 0;
}

static JSValue JS_GetPrivateField(JSContext *ctx, JSValueConst obj,
                                  JSValueConst name)
{
    JSObject *p;
    JSShapeProperty *prs;
    JSProperty *pr;
    JSAtom prop;

    if (js_unlikely(JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT))
        return JS_ThrowTypeErrorNotAnObject(ctx);
    /* safety check */
    if (js_unlikely(JS_VALUE_GET_TAG(name) != JS_TAG_SYMBOL))
        return JS_ThrowTypeErrorNotASymbol(ctx);
    prop = js_symbol_to_atom(ctx, (JSValue)name);
    p = JS_VALUE_GET_OBJ(obj);
    prs = find_own_property(&pr, p, prop);
    if (!prs) {
        JS_ThrowTypeErrorPrivateNotFound(ctx, prop);
        return JS_EXCEPTION;
    }
    return JS_DupValue(ctx, pr->u.value);
}

static int JS_SetPrivateField(JSContext *ctx, JSValueConst obj,
                              JSValueConst name, JSValue val)
{
    JSObject *p;
    JSShapeProperty *prs;
    JSProperty *pr;
    JSAtom prop;

    if (js_unlikely(JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)) {
        JS_ThrowTypeErrorNotAnObject(ctx);
        goto fail;
    }
    /* safety check */
    if (js_unlikely(JS_VALUE_GET_TAG(name) != JS_TAG_SYMBOL)) {
        JS_ThrowTypeErrorNotASymbol(ctx);
        goto fail;
    }
    prop = js_symbol_to_atom(ctx, (JSValue)name);
    p = JS_VALUE_GET_OBJ(obj);
    prs = find_own_property(&pr, p, prop);
    if (!prs) {
        JS_ThrowTypeErrorPrivateNotFound(ctx, prop);
    fail:
        JS_FreeValue(ctx, val);
        return -1;
    }
    set_value(ctx, &pr->u.value, val);
    return 0;
}

static int JS_AddBrand(JSContext *ctx, JSValueConst obj, JSValueConst home_obj)
{
    JSObject *p, *p1;
    JSShapeProperty *prs;
    JSProperty *pr;
    JSValue brand;
    JSAtom brand_atom;

    if (js_unlikely(JS_VALUE_GET_TAG(home_obj) != JS_TAG_OBJECT)) {
        JS_ThrowTypeErrorNotAnObject(ctx);
        return -1;
    }
    p = JS_VALUE_GET_OBJ(home_obj);
    prs = find_own_property(&pr, p, JS_ATOM_Private_brand);
    if (!prs) {
        brand = JS_NewSymbolFromAtom(ctx, JS_ATOM_brand, JS_ATOM_TYPE_PRIVATE);
        if (JS_IsException(brand))
            return -1;
        /* if the brand is not present, add it */
        pr = add_property(ctx, p, JS_ATOM_Private_brand, JS_PROP_C_W_E);
        if (!pr) {
            JS_FreeValue(ctx, brand);
            return -1;
        }
        pr->u.value = JS_DupValue(ctx, brand);
    } else {
        brand = JS_DupValue(ctx, pr->u.value);
    }
    brand_atom = js_symbol_to_atom(ctx, brand);

    if (js_unlikely(JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)) {
        JS_ThrowTypeErrorNotAnObject(ctx);
        JS_FreeAtom(ctx, brand_atom);
        return -1;
    }
    p1 = JS_VALUE_GET_OBJ(obj);
    pr = add_property(ctx, p1, brand_atom, JS_PROP_C_W_E);
    JS_FreeAtom(ctx, brand_atom);
    if (!pr)
        return -1;
    pr->u.value = JS_UNDEFINED;
    return 0;
}

static int JS_CheckBrand(JSContext *ctx, JSValueConst obj, JSValueConst func)
{
    JSObject *p, *p1, *home_obj;
    JSShapeProperty *prs;
    JSProperty *pr;
    JSValueConst brand;

    /* get the home object of 'func' */
    if (js_unlikely(JS_VALUE_GET_TAG(func) != JS_TAG_OBJECT)) {
    not_obj:
        JS_ThrowTypeErrorNotAnObject(ctx);
        return -1;
    }
    p1 = JS_VALUE_GET_OBJ(func);
    if (!js_class_has_bytecode(p1->class_id))
        goto not_obj;
    home_obj = p1->u.func.home_object;
    if (!home_obj)
        goto not_obj;
    prs = find_own_property(&pr, home_obj, JS_ATOM_Private_brand);
    if (!prs) {
        JS_ThrowTypeError(ctx, "expecting <brand> private field");
        return -1;
    }
    brand = pr->u.value;
    /* safety check */
    if (js_unlikely(JS_VALUE_GET_TAG(brand) != JS_TAG_SYMBOL))
        goto not_obj;

    /* get the brand array of 'obj' */
    if (js_unlikely(JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT))
        goto not_obj;
    p = JS_VALUE_GET_OBJ(obj);
    prs = find_own_property(&pr, p, js_symbol_to_atom(ctx, (JSValue)brand));
    if (!prs) {
        JS_ThrowTypeError(ctx, "invalid brand on object");
        return -1;
    }
    return 0;
}

static uint32_t js_string_obj_get_length(JSContext *ctx,
                                         JSValueConst obj)
{
    JSObject *p;
    JSString *p1;
    uint32_t len = 0;

    /* This is a class exotic method: obj class_id is JS_CLASS_STRING */
    p = JS_VALUE_GET_OBJ(obj);
    if (JS_VALUE_GET_TAG(p->u.object_data) == JS_TAG_STRING) {
        p1 = JS_VALUE_GET_STRING(p->u.object_data);
        len = p1->len;
    }
    return len;
}

static int num_keys_cmp(const void *p1, const void *p2, void *opaque)
{
    auto ctx = (JSContext*) opaque;
    JSAtom atom1 = ((const JSPropertyEnum *)p1)->atom;
    JSAtom atom2 = ((const JSPropertyEnum *)p2)->atom;
    uint32_t v1, v2;
    BOOL atom1_is_integer, atom2_is_integer;

    atom1_is_integer = JS_AtomIsArrayIndex(ctx, &v1, atom1);
    atom2_is_integer = JS_AtomIsArrayIndex(ctx, &v2, atom2);
    assert(atom1_is_integer && atom2_is_integer);
    if (v1 < v2)
        return -1;
    else if (v1 == v2)
        return 0;
    else
        return 1;
}

static void js_free_prop_enum(JSContext *ctx, JSPropertyEnum *tab, uint32_t len)
{
    uint32_t i;
    if (tab) {
        for(i = 0; i < len; i++)
            JS_FreeAtom(ctx, tab[i].atom);
        js_free(ctx, tab);
    }
}

/* return < 0 in case if exception, 0 if OK. ptab and its atoms must
   be freed by the user. */
[[nodiscard]] static int JS_GetOwnPropertyNamesInternal(JSContext *ctx,
                                                      JSPropertyEnum **ptab,
                                                      uint32_t *plen,
                                                      JSObject *p, int flags)
{
    int i, j;
    JSShape *sh;
    JSShapeProperty *prs;
    JSPropertyEnum *tab_atom, *tab_exotic;
    JSAtom atom;
    uint32_t num_keys_count, str_keys_count, sym_keys_count, atom_count;
    uint32_t num_index, str_index, sym_index, exotic_count, exotic_keys_count;
    BOOL is_enumerable, num_sorted;
    uint32_t num_key;
    JSAtomKindEnum kind;

    /* clear pointer for consistency in case of failure */
    *ptab = NULL;
    *plen = 0;

    /* compute the number of returned properties */
    num_keys_count = 0;
    str_keys_count = 0;
    sym_keys_count = 0;
    exotic_keys_count = 0;
    exotic_count = 0;
    tab_exotic = NULL;
    sh = p->shape;
    for(i = 0, prs = get_shape_prop(sh); i < sh->prop_count; i++, prs++) {
        atom = prs->atom;
        if (atom != JS_ATOM_NULL) {
            is_enumerable = ((prs->flags & JS_PROP_ENUMERABLE) != 0);
            kind = JS_AtomGetKind(ctx, atom);
            if ((!(flags & JS_GPN_ENUM_ONLY) || is_enumerable) &&
                ((flags >> kind) & 1) != 0) {
                /* need to raise an exception in case of the module
                   name space (implicit GetOwnProperty) */
                if (js_unlikely((prs->flags & JS_PROP_TMASK) == JS_PROP_VARREF) &&
                    (flags & (JS_GPN_SET_ENUM | JS_GPN_ENUM_ONLY))) {
                    JSVarRef *var_ref = p->prop[i].u.var_ref;
                    if (js_unlikely(JS_IsUninitialized(*var_ref->pvalue))) {
                        JS_ThrowReferenceErrorUninitialized(ctx, prs->atom);
                        return -1;
                    }
                }
                if (JS_AtomIsArrayIndex(ctx, &num_key, atom)) {
                    num_keys_count++;
                } else if (kind == JS_ATOM_KIND_STRING) {
                    str_keys_count++;
                } else {
                    sym_keys_count++;
                }
            }
        }
    }

    if (p->is_exotic) {
        if (p->fast_array) {
            if (flags & JS_GPN_STRING_MASK) {
                num_keys_count += p->u.array.count;
            }
        } else if (p->class_id == JS_CLASS_STRING) {
            if (flags & JS_GPN_STRING_MASK) {
                num_keys_count += js_string_obj_get_length(ctx, JS_MKPTR(JS_TAG_OBJECT, p));
            }
        } else {
            const JSClassExoticMethods *em = ctx->rt->class_array[p->class_id].exotic;
            if (em && em->get_own_property_names) {
                if (em->get_own_property_names(ctx, &tab_exotic, &exotic_count,
                                               JS_MKPTR(JS_TAG_OBJECT, p)))
                    return -1;
                for(i = 0; i < exotic_count; i++) {
                    atom = tab_exotic[i].atom;
                    kind = JS_AtomGetKind(ctx, atom);
                    if (((flags >> kind) & 1) != 0) {
                        is_enumerable = FALSE;
                        if (flags & (JS_GPN_SET_ENUM | JS_GPN_ENUM_ONLY)) {
                            JSPropertyDescriptor desc;
                            int res;
                            /* set the "is_enumerable" field if necessary */
                            res = JS_GetOwnPropertyInternal(ctx, &desc, p, atom);
                            if (res < 0) {
                                js_free_prop_enum(ctx, tab_exotic, exotic_count);
                                return -1;
                            }
                            if (res) {
                                is_enumerable =
                                    ((desc.flags & JS_PROP_ENUMERABLE) != 0);
                                js_free_desc(ctx, &desc);
                            }
                            tab_exotic[i].is_enumerable = is_enumerable;
                        }
                        if (!(flags & JS_GPN_ENUM_ONLY) || is_enumerable) {
                            exotic_keys_count++;
                        }
                    }
                }
            }
        }
    }

    /* fill them */

    atom_count = num_keys_count + str_keys_count + sym_keys_count + exotic_keys_count;
    /* avoid allocating 0 bytes */
    tab_atom = (JSPropertyEnum*) js_malloc(ctx, sizeof(tab_atom[0]) * max_int(atom_count, 1));
    if (!tab_atom) {
        js_free_prop_enum(ctx, tab_exotic, exotic_count);
        return -1;
    }

    num_index = 0;
    str_index = num_keys_count;
    sym_index = str_index + str_keys_count;

    num_sorted = TRUE;
    sh = p->shape;
    for(i = 0, prs = get_shape_prop(sh); i < sh->prop_count; i++, prs++) {
        atom = prs->atom;
        if (atom != JS_ATOM_NULL) {
            is_enumerable = ((prs->flags & JS_PROP_ENUMERABLE) != 0);
            kind = JS_AtomGetKind(ctx, atom);
            if ((!(flags & JS_GPN_ENUM_ONLY) || is_enumerable) &&
                ((flags >> kind) & 1) != 0) {
                if (JS_AtomIsArrayIndex(ctx, &num_key, atom)) {
                    j = num_index++;
                    num_sorted = FALSE;
                } else if (kind == JS_ATOM_KIND_STRING) {
                    j = str_index++;
                } else {
                    j = sym_index++;
                }
                tab_atom[j].atom = JS_DupAtom(ctx, atom);
                tab_atom[j].is_enumerable = is_enumerable;
            }
        }
    }

    if (p->is_exotic) {
        int len;
        if (p->fast_array) {
            if (flags & JS_GPN_STRING_MASK) {
                len = p->u.array.count;
                goto add_array_keys;
            }
        } else if (p->class_id == JS_CLASS_STRING) {
            if (flags & JS_GPN_STRING_MASK) {
                len = js_string_obj_get_length(ctx, JS_MKPTR(JS_TAG_OBJECT, p));
            add_array_keys:
                for(i = 0; i < len; i++) {
                    tab_atom[num_index].atom = __JS_AtomFromUInt32(i);
                    if (tab_atom[num_index].atom == JS_ATOM_NULL) {
                        js_free_prop_enum(ctx, tab_atom, num_index);
                        return -1;
                    }
                    tab_atom[num_index].is_enumerable = TRUE;
                    num_index++;
                }
            }
        } else {
            /* Note: exotic keys are not reordered and comes after the object own properties. */
            for(i = 0; i < exotic_count; i++) {
                atom = tab_exotic[i].atom;
                is_enumerable = tab_exotic[i].is_enumerable;
                kind = JS_AtomGetKind(ctx, atom);
                if ((!(flags & JS_GPN_ENUM_ONLY) || is_enumerable) &&
                    ((flags >> kind) & 1) != 0) {
                    tab_atom[sym_index].atom = atom;
                    tab_atom[sym_index].is_enumerable = is_enumerable;
                    sym_index++;
                } else {
                    JS_FreeAtom(ctx, atom);
                }
            }
            js_free(ctx, tab_exotic);
        }
    }

    assert(num_index == num_keys_count);
    assert(str_index == num_keys_count + str_keys_count);
    assert(sym_index == atom_count);

    if (num_keys_count != 0 && !num_sorted) {
        rqsort(tab_atom, num_keys_count, sizeof(tab_atom[0]), num_keys_cmp,
               ctx);
    }
    *ptab = tab_atom;
    *plen = atom_count;
    return 0;
}

inline int JS_GetOwnPropertyNames(JSContext *ctx, JSPropertyEnum **ptab,
                           uint32_t *plen, JSValueConst obj, int flags)
{
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT) {
        JS_ThrowTypeErrorNotAnObject(ctx);
        return -1;
    }
    return JS_GetOwnPropertyNamesInternal(ctx, ptab, plen,
                                          JS_VALUE_GET_OBJ(obj), flags);
}

/* Return -1 if exception,
   FALSE if the property does not exist, TRUE if it exists. If TRUE is
   returned, the property descriptor 'desc' is filled present. */
static int JS_GetOwnPropertyInternal(JSContext *ctx, JSPropertyDescriptor *desc,
                                     JSObject *p, JSAtom prop)
{
    JSShapeProperty *prs;
    JSProperty *pr;

retry:
    prs = find_own_property(&pr, p, prop);
    if (prs) {
        if (desc) {
            desc->flags = prs->flags & JS_PROP_C_W_E;
            desc->getter = JS_UNDEFINED;
            desc->setter = JS_UNDEFINED;
            desc->value = JS_UNDEFINED;
            if (js_unlikely(prs->flags & JS_PROP_TMASK)) {
                if ((prs->flags & JS_PROP_TMASK) == JS_PROP_GETSET) {
                    desc->flags |= JS_PROP_GETSET;
                    if (pr->u.getset.getter)
                        desc->getter = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, pr->u.getset.getter));
                    if (pr->u.getset.setter)
                        desc->setter = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, pr->u.getset.setter));
                } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_VARREF) {
                    JSValue val = *pr->u.var_ref->pvalue;
                    if (js_unlikely(JS_IsUninitialized(val))) {
                        JS_ThrowReferenceErrorUninitialized(ctx, prs->atom);
                        return -1;
                    }
                    desc->value = JS_DupValue(ctx, val);
                } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_AUTOINIT) {
                    /* Instantiate property and retry */
                    if (JS_AutoInitProperty(ctx, p, prop, pr, prs))
                        return -1;
                    goto retry;
                }
            } else {
                desc->value = JS_DupValue(ctx, pr->u.value);
            }
        } else {
            /* for consistency, send the exception even if desc is NULL */
            if (js_unlikely((prs->flags & JS_PROP_TMASK) == JS_PROP_VARREF)) {
                if (js_unlikely(JS_IsUninitialized(*pr->u.var_ref->pvalue))) {
                    JS_ThrowReferenceErrorUninitialized(ctx, prs->atom);
                    return -1;
                }
            } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_AUTOINIT) {
                /* nothing to do: delay instantiation until actual value and/or attributes are read */
            }
        }
        return TRUE;
    }
    if (p->is_exotic) {
        if (p->fast_array) {
            /* specific case for fast arrays */
            if (__JS_AtomIsTaggedInt(prop)) {
                uint32_t idx;
                idx = __JS_AtomToUInt32(prop);
                if (idx < p->u.array.count) {
                    if (desc) {
                        desc->flags = JS_PROP_WRITABLE | JS_PROP_ENUMERABLE |
                            JS_PROP_CONFIGURABLE;
                        desc->getter = JS_UNDEFINED;
                        desc->setter = JS_UNDEFINED;
                        desc->value = JS_GetPropertyUint32(ctx, JS_MKPTR(JS_TAG_OBJECT, p), idx);
                    }
                    return TRUE;
                }
            }
        } else {
            const JSClassExoticMethods *em = ctx->rt->class_array[p->class_id].exotic;
            if (em && em->get_own_property) {
                return em->get_own_property(ctx, desc,
                                            JS_MKPTR(JS_TAG_OBJECT, p), prop);
            }
        }
    }
    return FALSE;
}

inline int JS_GetOwnProperty(JSContext *ctx, JSPropertyDescriptor *desc,
                      JSValueConst obj, JSAtom prop)
{
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT) {
        JS_ThrowTypeErrorNotAnObject(ctx);
        return -1;
    }
    return JS_GetOwnPropertyInternal(ctx, desc, JS_VALUE_GET_OBJ(obj), prop);
}

/* return -1 if exception (Proxy object only) or TRUE/FALSE */
inline int JS_IsExtensible(JSContext *ctx, JSValueConst obj)
{
    JSObject *p;

    if (js_unlikely(JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT))
        return FALSE;
    p = JS_VALUE_GET_OBJ(obj);
    if (js_unlikely(p->class_id == JS_CLASS_PROXY))
        return js_proxy_isExtensible(ctx, obj);
    else
        return p->extensible;
}

/* return -1 if exception (Proxy object only) or TRUE/FALSE */
inline int JS_PreventExtensions(JSContext *ctx, JSValueConst obj)
{
    JSObject *p;

    if (js_unlikely(JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT))
        return FALSE;
    p = JS_VALUE_GET_OBJ(obj);
    if (js_unlikely(p->class_id == JS_CLASS_PROXY))
        return js_proxy_preventExtensions(ctx, obj);
    p->extensible = FALSE;
    return TRUE;
}

/* return -1 if exception otherwise TRUE or FALSE */
inline int JS_HasProperty(JSContext *ctx, JSValueConst obj, JSAtom prop)
{
    JSObject *p;
    int ret;
    JSValue obj1;

    if (js_unlikely(JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT))
        return FALSE;
    p = JS_VALUE_GET_OBJ(obj);
    for(;;) {
        if (p->is_exotic) {
            const JSClassExoticMethods *em = ctx->rt->class_array[p->class_id].exotic;
            if (em && em->has_property) {
                /* has_property can free the prototype */
                obj1 = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p));
                ret = em->has_property(ctx, obj1, prop);
                JS_FreeValue(ctx, obj1);
                return ret;
            }
        }
        /* JS_GetOwnPropertyInternal can free the prototype */
        JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p));
        ret = JS_GetOwnPropertyInternal(ctx, NULL, p, prop);
        JS_FreeValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p));
        if (ret != 0)
            return ret;
        if (p->class_id >= JS_CLASS_UINT8C_ARRAY &&
            p->class_id <= JS_CLASS_FLOAT64_ARRAY) {
            ret = JS_AtomIsNumericIndex(ctx, prop);
            if (ret != 0) {
                if (ret < 0)
                    return -1;
                return FALSE;
            }
        }
        p = p->shape->proto;
        if (!p)
            break;
    }
    return FALSE;
}

/* val must be a symbol */
static JSAtom js_symbol_to_atom(JSContext *ctx, JSValue val)
{
    auto p = (JSAtomStruct*) JS_VALUE_GET_PTR(val);
    return js_get_atom_index(ctx->rt, p);
}

/* return JS_ATOM_NULL in case of exception */
inline JSAtom JS_ValueToAtom(JSContext *ctx, JSValueConst val)
{
    JSAtom atom;
    uint32_t tag;
    tag = JS_VALUE_GET_TAG(val);
    if (tag == JS_TAG_INT &&
        (uint32_t)JS_VALUE_GET_INT(val) <= JS_ATOM_MAX_INT) {
        /* fast path for integer values */
        atom = __JS_AtomFromUInt32(JS_VALUE_GET_INT(val));
    } else if (tag == JS_TAG_SYMBOL) {
        auto p = (JSAtomStruct*) JS_VALUE_GET_PTR(val);
        atom = JS_DupAtom(ctx, js_get_atom_index(ctx->rt, p));
    } else {
        JSValue str;
        str = JS_ToPropertyKey(ctx, val);
        if (JS_IsException(str))
            return JS_ATOM_NULL;
        if (JS_VALUE_GET_TAG(str) == JS_TAG_SYMBOL) {
            atom = js_symbol_to_atom(ctx, str);
        } else {
            atom = JS_NewAtomStr(ctx, JS_VALUE_GET_STRING(str));
        }
    }
    return atom;
}

static JSValue JS_GetPropertyValue(JSContext *ctx, JSValueConst this_obj,
                                   JSValue prop)
{
    JSAtom atom;
    JSValue ret;

    if (js_likely(JS_VALUE_GET_TAG(this_obj) == JS_TAG_OBJECT &&
               JS_VALUE_GET_TAG(prop) == JS_TAG_INT)) {
        JSObject *p;
        uint32_t idx, len;
        /* fast path for array access */
        p = JS_VALUE_GET_OBJ(this_obj);
        idx = JS_VALUE_GET_INT(prop);
        len = (uint32_t)p->u.array.count;
        if (js_unlikely(idx >= len))
            goto slow_path;
        switch(p->class_id) {
        case JS_CLASS_ARRAY:
        case JS_CLASS_ARGUMENTS:
            return JS_DupValue(ctx, p->u.array.u.values[idx]);
        case JS_CLASS_INT8_ARRAY:
            return JS_NewInt32(ctx, p->u.array.u.int8_ptr[idx]);
        case JS_CLASS_UINT8C_ARRAY:
        case JS_CLASS_UINT8_ARRAY:
            return JS_NewInt32(ctx, p->u.array.u.uint8_ptr[idx]);
        case JS_CLASS_INT16_ARRAY:
            return JS_NewInt32(ctx, p->u.array.u.int16_ptr[idx]);
        case JS_CLASS_UINT16_ARRAY:
            return JS_NewInt32(ctx, p->u.array.u.uint16_ptr[idx]);
        case JS_CLASS_INT32_ARRAY:
            return JS_NewInt32(ctx, p->u.array.u.int32_ptr[idx]);
        case JS_CLASS_UINT32_ARRAY:
            return JS_NewUint32(ctx, p->u.array.u.uint32_ptr[idx]);
#ifdef CONFIG_BIGNUM
        case JS_CLASS_BIG_INT64_ARRAY:
            return JS_NewBigInt64(ctx, p->u.array.u.int64_ptr[idx]);
        case JS_CLASS_BIG_UINT64_ARRAY:
            return JS_NewBigUint64(ctx, p->u.array.u.uint64_ptr[idx]);
#endif
        case JS_CLASS_FLOAT32_ARRAY:
            return __JS_NewFloat64(ctx, p->u.array.u.float_ptr[idx]);
        case JS_CLASS_FLOAT64_ARRAY:
            return __JS_NewFloat64(ctx, p->u.array.u.double_ptr[idx]);
        default:
            goto slow_path;
        }
    } else {
    slow_path:
        atom = JS_ValueToAtom(ctx, prop);
        JS_FreeValue(ctx, prop);
        if (js_unlikely(atom == JS_ATOM_NULL))
            return JS_EXCEPTION;
        ret = JS_GetProperty(ctx, this_obj, atom);
        JS_FreeAtom(ctx, atom);
        return ret;
    }
}

inline JSValue JS_GetPropertyUint32(JSContext *ctx, JSValueConst this_obj, uint32_t idx)
{
    return JS_GetPropertyValue(ctx, this_obj, JS_NewUint32(ctx, idx));
}

/* Check if an object has a generalized numeric property. Return value:
   -1 for exception,
   TRUE if property exists, stored into *pval,
   FALSE if proprty does not exist.
 */
static int JS_TryGetPropertyInt64(JSContext *ctx, JSValueConst obj, int64_t idx, JSValue *pval)
{
    JSValue val = JS_UNDEFINED;
    JSAtom prop;
    int present;

    if (js_likely((uint64_t)idx <= JS_ATOM_MAX_INT)) {
        /* fast path */
        present = JS_HasProperty(ctx, obj, __JS_AtomFromUInt32(idx));
        if (present > 0) {
            val = JS_GetPropertyValue(ctx, obj, JS_NewInt32(ctx, idx));
            if (js_unlikely(JS_IsException(val)))
                present = -1;
        }
    } else {
        prop = JS_NewAtomInt64(ctx, idx);
        present = -1;
        if (js_likely(prop != JS_ATOM_NULL)) {
            present = JS_HasProperty(ctx, obj, prop);
            if (present > 0) {
                val = JS_GetProperty(ctx, obj, prop);
                if (js_unlikely(JS_IsException(val)))
                    present = -1;
            }
            JS_FreeAtom(ctx, prop);
        }
    }
    *pval = val;
    return present;
}

static JSValue JS_GetPropertyInt64(JSContext *ctx, JSValueConst obj, int64_t idx)
{
    JSAtom prop;
    JSValue val;

    if ((uint64_t)idx <= INT32_MAX) {
        /* fast path for fast arrays */
        return JS_GetPropertyValue(ctx, obj, JS_NewInt32(ctx, idx));
    }
    prop = JS_NewAtomInt64(ctx, idx);
    if (prop == JS_ATOM_NULL)
        return JS_EXCEPTION;

    val = JS_GetProperty(ctx, obj, prop);
    JS_FreeAtom(ctx, prop);
    return val;
}

inline JSValue JS_GetPropertyStr(JSContext *ctx, JSValueConst this_obj,
                          const char *prop)
{
    JSAtom atom;
    JSValue ret;
    atom = JS_NewAtom(ctx, prop);
    ret = JS_GetProperty(ctx, this_obj, atom);
    JS_FreeAtom(ctx, atom);
    return ret;
}

/* Note: the property value is not initialized. Return NULL if memory
   error. */
static JSProperty *add_property(JSContext *ctx,
                                JSObject *p, JSAtom prop, int prop_flags)
{
    JSShape *sh, *new_sh;

    sh = p->shape;
    if (sh->is_hashed) {
        /* try to find an existing shape */
        new_sh = find_hashed_shape_prop(ctx->rt, sh, prop, prop_flags);
        if (new_sh) {
            /* matching shape found: use it */
            /*  the property array may need to be resized */
            if (new_sh->prop_size != sh->prop_size) {
                JSProperty *new_prop;
                new_prop = (JSProperty*) js_realloc(ctx, p->prop, sizeof(p->prop[0]) *
                                      new_sh->prop_size);
                if (!new_prop)
                    return NULL;
                p->prop = new_prop;
            }
            p->shape = js_dup_shape(new_sh);
            js_free_shape(ctx->rt, sh);
            return &p->prop[new_sh->prop_count - 1];
        } else if (sh->header.ref_count != 1) {
            /* if the shape is shared, clone it */
            new_sh = js_clone_shape(ctx, sh);
            if (!new_sh)
                return NULL;
            /* hash the cloned shape */
            new_sh->is_hashed = TRUE;
            js_shape_hash_link(ctx->rt, new_sh);
            js_free_shape(ctx->rt, p->shape);
            p->shape = new_sh;
        }
    }
    assert(p->shape->header.ref_count == 1);
    if (add_shape_property(ctx, &p->shape, p, prop, prop_flags))
        return NULL;
    return &p->prop[p->shape->prop_count - 1];
}

/* can be called on Array or Arguments objects. return < 0 if
   memory alloc error. */
[[nodiscard]] static inline int convert_fast_array_to_array(JSContext *ctx,
                                                             JSObject *p)
{
    JSProperty *pr;
    JSShape *sh;
    JSValue *tab;
    uint32_t i, len, new_count;

    if (js_shape_prepare_update(ctx, p, NULL))
        return -1;
    len = p->u.array.count;
    /* resize the properties once to simplify the error handling */
    sh = p->shape;
    new_count = sh->prop_count + len;
    if (new_count > sh->prop_size) {
        if (resize_properties(ctx, &p->shape, p, new_count))
            return -1;
    }

    tab = p->u.array.u.values;
    for(i = 0; i < len; i++) {
        /* add_property cannot fail here but
           __JS_AtomFromUInt32(i) fails for i > INT32_MAX */
        pr = add_property(ctx, p, __JS_AtomFromUInt32(i), JS_PROP_C_W_E);
        pr->u.value = *tab++;
    }
    js_free(ctx, p->u.array.u.values);
    p->u.array.count = 0;
    p->u.array.u.values = NULL; /* fail safe */
    p->u.array.u1.size = 0;
    p->fast_array = 0;
    return 0;
}

static int delete_property(JSContext *ctx, JSObject *p, JSAtom atom)
{
    JSShape *sh;
    JSShapeProperty *pr, *lpr, *prop;
    JSProperty *pr1;
    uint32_t lpr_idx;
    intptr_t h, h1;

 redo:
    sh = p->shape;
    h1 = atom & sh->prop_hash_mask;
    h = prop_hash_end(sh)[-h1 - 1];
    prop = get_shape_prop(sh);
    lpr = NULL;
    lpr_idx = 0;   /* prevent warning */
    while (h != 0) {
        pr = &prop[h - 1];
        if (js_likely(pr->atom == atom)) {
            /* found ! */
            if (!(pr->flags & JS_PROP_CONFIGURABLE))
                return FALSE;
            /* realloc the shape if needed */
            if (lpr)
                lpr_idx = lpr - get_shape_prop(sh);
            if (js_shape_prepare_update(ctx, p, &pr))
                return -1;
            sh = p->shape;
            /* remove property */
            if (lpr) {
                lpr = get_shape_prop(sh) + lpr_idx;
                lpr->hash_next = pr->hash_next;
            } else {
                prop_hash_end(sh)[-h1 - 1] = pr->hash_next;
            }
            sh->deleted_prop_count++;
            /* free the entry */
            pr1 = &p->prop[h - 1];
            free_property(ctx->rt, pr1, pr->flags);
            JS_FreeAtom(ctx, pr->atom);
            /* put default values */
            pr->flags = 0;
            pr->atom = JS_ATOM_NULL;
            pr1->u.value = JS_UNDEFINED;

            /* compact the properties if too many deleted properties */
            if (sh->deleted_prop_count >= 8 &&
                sh->deleted_prop_count >= ((unsigned)sh->prop_count / 2)) {
                compact_properties(ctx, p);
            }
            return TRUE;
        }
        lpr = pr;
        h = pr->hash_next;
    }

    if (p->is_exotic) {
        if (p->fast_array) {
            uint32_t idx;
            if (JS_AtomIsArrayIndex(ctx, &idx, atom) &&
                idx < p->u.array.count) {
                if (p->class_id == JS_CLASS_ARRAY ||
                    p->class_id == JS_CLASS_ARGUMENTS) {
                    /* Special case deleting the last element of a fast Array */
                    if (idx == p->u.array.count - 1) {
                        JS_FreeValue(ctx, p->u.array.u.values[idx]);
                        p->u.array.count = idx;
                        return TRUE;
                    }
                    if (convert_fast_array_to_array(ctx, p))
                        return -1;
                    goto redo;
                } else {
                    return FALSE;
                }
            }
        } else {
            const JSClassExoticMethods *em = ctx->rt->class_array[p->class_id].exotic;
            if (em && em->delete_property) {
                return em->delete_property(ctx, JS_MKPTR(JS_TAG_OBJECT, p), atom);
            }
        }
    }
    /* not found */
    return TRUE;
}

static int call_setter(JSContext *ctx, JSObject *setter,
                       JSValueConst this_obj, JSValue val, int flags)
{
    JSValue ret, func;
    if (js_likely(setter)) {
        func = JS_MKPTR(JS_TAG_OBJECT, setter);
        /* Note: the field could be removed in the setter */
        func = JS_DupValue(ctx, func);
        ret = JS_CallFree(ctx, func, this_obj, 1, (JSValueConst *)&val);
        JS_FreeValue(ctx, val);
        if (JS_IsException(ret))
            return -1;
        JS_FreeValue(ctx, ret);
        return TRUE;
    } else {
        JS_FreeValue(ctx, val);
        if ((flags & JS_PROP_THROW) ||
            ((flags & JS_PROP_THROW_STRICT) && is_strict_mode(ctx))) {
            JS_ThrowTypeError(ctx, "no setter for property");
            return -1;
        }
        return FALSE;
    }
}

/* set the array length and remove the array elements if necessary. */
static int set_array_length(JSContext *ctx, JSObject *p, JSValue val,
                            int flags)
{
    uint32_t len, idx, cur_len;
    int i, ret;

    /* Note: this call can reallocate the properties of 'p' */
    ret = JS_ToArrayLengthFree(ctx, &len, val, FALSE);
    if (ret)
        return -1;
    /* JS_ToArrayLengthFree() must be done before the read-only test */
    if (js_unlikely(!(p->shape->prop[0].flags & JS_PROP_WRITABLE)))
        return JS_ThrowTypeErrorReadOnly(ctx, flags, JS_ATOM_length);

    if (js_likely(p->fast_array)) {
        uint32_t old_len = p->u.array.count;
        if (len < old_len) {
            for(i = len; i < old_len; i++) {
                JS_FreeValue(ctx, p->u.array.u.values[i]);
            }
            p->u.array.count = len;
        }
        p->prop[0].u.value = JS_NewUint32(ctx, len);
    } else {
        /* Note: length is always a uint32 because the object is an
           array */
        JS_ToUint32(ctx, &cur_len, p->prop[0].u.value);
        if (len < cur_len) {
            uint32_t d;
            JSShape *sh;
            JSShapeProperty *pr;

            d = cur_len - len;
            sh = p->shape;
            if (d <= sh->prop_count) {
                JSAtom atom;

                /* faster to iterate */
                while (cur_len > len) {
                    atom = JS_NewAtomUInt32(ctx, cur_len - 1);
                    ret = delete_property(ctx, p, atom);
                    JS_FreeAtom(ctx, atom);
                    if (js_unlikely(!ret)) {
                        /* unlikely case: property is not
                           configurable */
                        break;
                    }
                    cur_len--;
                }
            } else {
                /* faster to iterate thru all the properties. Need two
                   passes in case one of the property is not
                   configurable */
                cur_len = len;
                for(i = 0, pr = get_shape_prop(sh); i < sh->prop_count;
                    i++, pr++) {
                    if (pr->atom != JS_ATOM_NULL &&
                        JS_AtomIsArrayIndex(ctx, &idx, pr->atom)) {
                        if (idx >= cur_len &&
                            !(pr->flags & JS_PROP_CONFIGURABLE)) {
                            cur_len = idx + 1;
                        }
                    }
                }

                for(i = 0, pr = get_shape_prop(sh); i < sh->prop_count;
                    i++, pr++) {
                    if (pr->atom != JS_ATOM_NULL &&
                        JS_AtomIsArrayIndex(ctx, &idx, pr->atom)) {
                        if (idx >= cur_len) {
                            /* remove the property */
                            delete_property(ctx, p, pr->atom);
                            /* WARNING: the shape may have been modified */
                            sh = p->shape;
                            pr = get_shape_prop(sh) + i;
                        }
                    }
                }
            }
        } else {
            cur_len = len;
        }
        set_value(ctx, &p->prop[0].u.value, JS_NewUint32(ctx, cur_len));
        if (js_unlikely(cur_len > len)) {
            return JS_ThrowTypeErrorOrFalse(ctx, flags, "not configurable");
        }
    }
    return TRUE;
}

/* return -1 if exception */
static int expand_fast_array(JSContext *ctx, JSObject *p, uint32_t new_len)
{
    uint32_t new_size;
    size_t slack;
    JSValue *new_array_prop;
    /* XXX: potential arithmetic overflow */
    new_size = max_int(new_len, p->u.array.u1.size * 3 / 2);
    new_array_prop = (JSValue*) js_realloc2(ctx, p->u.array.u.values, sizeof(JSValue) * new_size, &slack);
    if (!new_array_prop)
        return -1;
    new_size += slack / sizeof(*new_array_prop);
    p->u.array.u.values = new_array_prop;
    p->u.array.u1.size = new_size;
    return 0;
}

/* Preconditions: 'p' must be of class JS_CLASS_ARRAY, p->fast_array =
   TRUE and p->extensible = TRUE */
static int add_fast_array_element(JSContext *ctx, JSObject *p,
                                  JSValue val, int flags)
{
    uint32_t new_len, array_len;
    /* extend the array by one */
    /* XXX: convert to slow array if new_len > 2^31-1 elements */
    new_len = p->u.array.count + 1;
    /* update the length if necessary. We assume that if the length is
       not an integer, then if it >= 2^31.  */
    if (js_likely(JS_VALUE_GET_TAG(p->prop[0].u.value) == JS_TAG_INT)) {
        array_len = JS_VALUE_GET_INT(p->prop[0].u.value);
        if (new_len > array_len) {
            if (js_unlikely(!(get_shape_prop(p->shape)->flags & JS_PROP_WRITABLE))) {
                JS_FreeValue(ctx, val);
                return JS_ThrowTypeErrorReadOnly(ctx, flags, JS_ATOM_length);
            }
            p->prop[0].u.value = JS_NewInt32(ctx, new_len);
        }
    }
    if (js_unlikely(new_len > p->u.array.u1.size)) {
        if (expand_fast_array(ctx, p, new_len)) {
            JS_FreeValue(ctx, val);
            return -1;
        }
    }
    p->u.array.u.values[new_len - 1] = val;
    p->u.array.count = new_len;
    return TRUE;
}

static void js_free_desc(JSContext *ctx, JSPropertyDescriptor *desc)
{
    JS_FreeValue(ctx, desc->getter);
    JS_FreeValue(ctx, desc->setter);
    JS_FreeValue(ctx, desc->value);
}

/* generic (and slower) version of JS_SetProperty() for
 * Reflect.set(). 'obj' must be an object.  */
static int JS_SetPropertyGeneric(JSContext *ctx,
                                 JSValueConst obj, JSAtom prop,
                                 JSValue val, JSValueConst this_obj,
                                 int flags)
{
    int ret;
    JSPropertyDescriptor desc;
    JSValue obj1;
    JSObject *p;

    obj1 = JS_DupValue(ctx, obj);
    for(;;) {
        p = JS_VALUE_GET_OBJ(obj1);
        if (p->is_exotic) {
            const JSClassExoticMethods *em = ctx->rt->class_array[p->class_id].exotic;
            if (em && em->set_property) {
                ret = em->set_property(ctx, obj1, prop,
                                       val, this_obj, flags);
                JS_FreeValue(ctx, obj1);
                JS_FreeValue(ctx, val);
                return ret;
            }
        }

        ret = JS_GetOwnPropertyInternal(ctx, &desc, p, prop);
        if (ret < 0) {
            JS_FreeValue(ctx, obj1);
            JS_FreeValue(ctx, val);
            return ret;
        }
        if (ret) {
            if (desc.flags & JS_PROP_GETSET) {
                JSObject *setter;
                if (JS_IsUndefined(desc.setter))
                    setter = NULL;
                else
                    setter = JS_VALUE_GET_OBJ(desc.setter);
                ret = call_setter(ctx, setter, this_obj, val, flags);
                JS_FreeValue(ctx, desc.getter);
                JS_FreeValue(ctx, desc.setter);
                JS_FreeValue(ctx, obj1);
                return ret;
            } else {
                JS_FreeValue(ctx, desc.value);
                if (!(desc.flags & JS_PROP_WRITABLE)) {
                    JS_FreeValue(ctx, obj1);
                    goto read_only_error;
                }
            }
            break;
        }
        /* Note: at this point 'obj1' cannot be a proxy. XXX: may have
           to check recursion */
        obj1 = JS_GetPrototypeFree(ctx, obj1);
        if (JS_IsNull(obj1))
            break;
    }
    JS_FreeValue(ctx, obj1);

    if (!JS_IsObject(this_obj)) {
        JS_FreeValue(ctx, val);
        return JS_ThrowTypeErrorOrFalse(ctx, flags, "receiver is not an object");
    }

    p = JS_VALUE_GET_OBJ(this_obj);

    /* modify the property in this_obj if it already exists */
    ret = JS_GetOwnPropertyInternal(ctx, &desc, p, prop);
    if (ret < 0) {
        JS_FreeValue(ctx, val);
        return ret;
    }
    if (ret) {
        if (desc.flags & JS_PROP_GETSET) {
            JS_FreeValue(ctx, desc.getter);
            JS_FreeValue(ctx, desc.setter);
            JS_FreeValue(ctx, val);
            return JS_ThrowTypeErrorOrFalse(ctx, flags, "setter is forbidden");
        } else {
            JS_FreeValue(ctx, desc.value);
            if (!(desc.flags & JS_PROP_WRITABLE) ||
                p->class_id == JS_CLASS_MODULE_NS) {
            read_only_error:
                JS_FreeValue(ctx, val);
                return JS_ThrowTypeErrorReadOnly(ctx, flags, prop);
            }
        }
        ret = JS_DefineProperty(ctx, this_obj, prop, val,
                                JS_UNDEFINED, JS_UNDEFINED,
                                JS_PROP_HAS_VALUE);
        JS_FreeValue(ctx, val);
        return ret;
    }

    ret = JS_CreateProperty(ctx, p, prop, val, JS_UNDEFINED, JS_UNDEFINED,
                            flags |
                            JS_PROP_HAS_VALUE |
                            JS_PROP_HAS_ENUMERABLE |
                            JS_PROP_HAS_WRITABLE |
                            JS_PROP_HAS_CONFIGURABLE |
                            JS_PROP_C_W_E);
    JS_FreeValue(ctx, val);
    return ret;
}

/* return -1 in case of exception or TRUE or FALSE. Warning: 'val' is
   freed by the function. 'flags' is a bitmask of JS_PROP_NO_ADD,
   JS_PROP_THROW or JS_PROP_THROW_STRICT. If JS_PROP_NO_ADD is set,
   the new property is not added and an error is raised. */
inline int JS_SetPropertyInternal(JSContext *ctx, JSValueConst this_obj,
                           JSAtom prop, JSValue val, int flags)
{
    JSObject *p, *p1;
    JSShapeProperty *prs;
    JSProperty *pr;
    uint32_t tag;
    JSPropertyDescriptor desc;
    int ret;
#if 0
    printf("JS_SetPropertyInternal: "); print_atom(ctx, prop); printf("\n");
#endif
    tag = JS_VALUE_GET_TAG(this_obj);
    if (js_unlikely(tag != JS_TAG_OBJECT)) {
        switch(tag) {
        case JS_TAG_NULL:
            JS_FreeValue(ctx, val);
            JS_ThrowTypeErrorAtom(ctx, "cannot set property '%s' of null", prop);
            return -1;
        case JS_TAG_UNDEFINED:
            JS_FreeValue(ctx, val);
            JS_ThrowTypeErrorAtom(ctx, "cannot set property '%s' of undefined", prop);
            return -1;
        default:
            /* even on a primitive type we can have setters on the prototype */
            p = NULL;
            p1 = JS_VALUE_GET_OBJ(JS_GetPrototypePrimitive(ctx, this_obj));
            goto prototype_lookup;
        }
    }
    p = JS_VALUE_GET_OBJ(this_obj);
retry:
    prs = find_own_property(&pr, p, prop);
    if (prs) {
        if (js_likely((prs->flags & (JS_PROP_TMASK | JS_PROP_WRITABLE |
                                  JS_PROP_LENGTH)) == JS_PROP_WRITABLE)) {
            /* fast case */
            set_value(ctx, &pr->u.value, val);
            return TRUE;
        } else if (prs->flags & JS_PROP_LENGTH) {
            assert(p->class_id == JS_CLASS_ARRAY);
            assert(prop == JS_ATOM_length);
            return set_array_length(ctx, p, val, flags);
        } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_GETSET) {
            return call_setter(ctx, pr->u.getset.setter, this_obj, val, flags);
        } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_VARREF) {
            /* JS_PROP_WRITABLE is always true for variable
               references, but they are write protected in module name
               spaces. */
            if (p->class_id == JS_CLASS_MODULE_NS)
                goto read_only_prop;
            set_value(ctx, pr->u.var_ref->pvalue, val);
            return TRUE;
        } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_AUTOINIT) {
            /* Instantiate property and retry (potentially useless) */
            if (JS_AutoInitProperty(ctx, p, prop, pr, prs)) {
                JS_FreeValue(ctx, val);
                return -1;
            }
            goto retry;
        } else {
            goto read_only_prop;
        }
    }

    p1 = p;
    for(;;) {
        if (p1->is_exotic) {
            if (p1->fast_array) {
                if (__JS_AtomIsTaggedInt(prop)) {
                    uint32_t idx = __JS_AtomToUInt32(prop);
                    if (idx < p1->u.array.count) {
                        if (js_unlikely(p == p1))
                            return JS_SetPropertyValue(ctx, this_obj, JS_NewInt32(ctx, idx), val, flags);
                        else
                            break;
                    } else if (p1->class_id >= JS_CLASS_UINT8C_ARRAY &&
                               p1->class_id <= JS_CLASS_FLOAT64_ARRAY) {
                        goto typed_array_oob;
                    }
                } else if (p1->class_id >= JS_CLASS_UINT8C_ARRAY &&
                           p1->class_id <= JS_CLASS_FLOAT64_ARRAY) {
                    ret = JS_AtomIsNumericIndex(ctx, prop);
                    if (ret != 0) {
                        if (ret < 0) {
                            JS_FreeValue(ctx, val);
                            return -1;
                        }
                    typed_array_oob:
                        val = JS_ToNumberFree(ctx, val);
                        JS_FreeValue(ctx, val);
                        if (JS_IsException(val))
                            return -1;
                        return JS_ThrowTypeErrorOrFalse(ctx, flags, "out-of-bound numeric index");
                    }
                }
            } else {
                const JSClassExoticMethods *em = ctx->rt->class_array[p1->class_id].exotic;
                if (em) {
                    JSValue obj1;
                    if (em->set_property) {
                        /* set_property can free the prototype */
                        obj1 = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p1));
                        ret = em->set_property(ctx, obj1, prop,
                                               val, this_obj, flags);
                        JS_FreeValue(ctx, obj1);
                        JS_FreeValue(ctx, val);
                        return ret;
                    }
                    if (em->get_own_property) {
                        /* get_own_property can free the prototype */
                        obj1 = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p1));
                        ret = em->get_own_property(ctx, &desc,
                                                   obj1, prop);
                        JS_FreeValue(ctx, obj1);
                        if (ret < 0) {
                            JS_FreeValue(ctx, val);
                            return ret;
                        }
                        if (ret) {
                            if (desc.flags & JS_PROP_GETSET) {
                                JSObject *setter;
                                if (JS_IsUndefined(desc.setter))
                                    setter = NULL;
                                else
                                    setter = JS_VALUE_GET_OBJ(desc.setter);
                                ret = call_setter(ctx, setter, this_obj, val, flags);
                                JS_FreeValue(ctx, desc.getter);
                                JS_FreeValue(ctx, desc.setter);
                                return ret;
                            } else {
                                JS_FreeValue(ctx, desc.value);
                                if (!(desc.flags & JS_PROP_WRITABLE))
                                    goto read_only_prop;
                                if (js_likely(p == p1)) {
                                    ret = JS_DefineProperty(ctx, this_obj, prop, val,
                                                            JS_UNDEFINED, JS_UNDEFINED,
                                                            JS_PROP_HAS_VALUE);
                                    JS_FreeValue(ctx, val);
                                    return ret;
                                } else {
                                    break;
                                }
                            }
                        }
                    }
                }
            }
        }
        p1 = p1->shape->proto;
    prototype_lookup:
        if (!p1)
            break;

    retry2:
        prs = find_own_property(&pr, p1, prop);
        if (prs) {
            if ((prs->flags & JS_PROP_TMASK) == JS_PROP_GETSET) {
                return call_setter(ctx, pr->u.getset.setter, this_obj, val, flags);
            } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_AUTOINIT) {
                /* Instantiate property and retry (potentially useless) */
                if (JS_AutoInitProperty(ctx, p1, prop, pr, prs))
                    return -1;
                goto retry2;
            } else if (!(prs->flags & JS_PROP_WRITABLE)) {
            read_only_prop:
                JS_FreeValue(ctx, val);
                return JS_ThrowTypeErrorReadOnly(ctx, flags, prop);
            }
        }
    }

    if (js_unlikely(flags & JS_PROP_NO_ADD)) {
        JS_FreeValue(ctx, val);
        JS_ThrowReferenceErrorNotDefined(ctx, prop);
        return -1;
    }

    if (js_unlikely(!p)) {
        JS_FreeValue(ctx, val);
        return JS_ThrowTypeErrorOrFalse(ctx, flags, "not an object");
    }

    if (js_unlikely(!p->extensible)) {
        JS_FreeValue(ctx, val);
        return JS_ThrowTypeErrorOrFalse(ctx, flags, "object is not extensible");
    }

    if (p->is_exotic) {
        if (p->class_id == JS_CLASS_ARRAY && p->fast_array &&
            __JS_AtomIsTaggedInt(prop)) {
            uint32_t idx = __JS_AtomToUInt32(prop);
            if (idx == p->u.array.count) {
                /* fast case */
                return add_fast_array_element(ctx, p, val, flags);
            } else {
                goto generic_create_prop;
            }
        } else {
        generic_create_prop:
            ret = JS_CreateProperty(ctx, p, prop, val, JS_UNDEFINED, JS_UNDEFINED,
                                    flags |
                                    JS_PROP_HAS_VALUE |
                                    JS_PROP_HAS_ENUMERABLE |
                                    JS_PROP_HAS_WRITABLE |
                                    JS_PROP_HAS_CONFIGURABLE |
                                    JS_PROP_C_W_E);
            JS_FreeValue(ctx, val);
            return ret;
        }
    }

    pr = add_property(ctx, p, prop, JS_PROP_C_W_E);
    if (js_unlikely(!pr)) {
        JS_FreeValue(ctx, val);
        return -1;
    }
    pr->u.value = val;
    return TRUE;
}

/* flags can be JS_PROP_THROW or JS_PROP_THROW_STRICT */
static int JS_SetPropertyValue(JSContext *ctx, JSValueConst this_obj,
                               JSValue prop, JSValue val, int flags)
{
    if (js_likely(JS_VALUE_GET_TAG(this_obj) == JS_TAG_OBJECT &&
               JS_VALUE_GET_TAG(prop) == JS_TAG_INT)) {
        JSObject *p;
        uint32_t idx;
        double d;
        int32_t v;

        /* fast path for array access */
        p = JS_VALUE_GET_OBJ(this_obj);
        idx = JS_VALUE_GET_INT(prop);
        switch(p->class_id) {
        case JS_CLASS_ARRAY:
            if (js_unlikely(idx >= (uint32_t)p->u.array.count)) {
                JSObject *p1;
                JSShape *sh1;

                /* fast path to add an element to the array */
                if (idx != (uint32_t)p->u.array.count ||
                    !p->fast_array || !p->extensible)
                    goto slow_path;
                /* check if prototype chain has a numeric property */
                p1 = p->shape->proto;
                while (p1 != NULL) {
                    sh1 = p1->shape;
                    if (p1->class_id == JS_CLASS_ARRAY) {
                        if (js_unlikely(!p1->fast_array))
                            goto slow_path;
                    } else if (p1->class_id == JS_CLASS_OBJECT) {
                        if (js_unlikely(sh1->has_small_array_index))
                            goto slow_path;
                    } else {
                        goto slow_path;
                    }
                    p1 = sh1->proto;
                }
                /* add element */
                return add_fast_array_element(ctx, p, val, flags);
            }
            set_value(ctx, &p->u.array.u.values[idx], val);
            break;
        case JS_CLASS_ARGUMENTS:
            if (js_unlikely(idx >= (uint32_t)p->u.array.count))
                goto slow_path;
            set_value(ctx, &p->u.array.u.values[idx], val);
            break;
        case JS_CLASS_UINT8C_ARRAY:
            if (JS_ToUint8ClampFree(ctx, &v, val))
                return -1;
            /* Note: the conversion can detach the typed array, so the
               array bound check must be done after */
            if (js_unlikely(idx >= (uint32_t)p->u.array.count))
                goto ta_out_of_bound;
            p->u.array.u.uint8_ptr[idx] = v;
            break;
        case JS_CLASS_INT8_ARRAY:
        case JS_CLASS_UINT8_ARRAY:
            if (JS_ToInt32Free(ctx, &v, val))
                return -1;
            if (js_unlikely(idx >= (uint32_t)p->u.array.count))
                goto ta_out_of_bound;
            p->u.array.u.uint8_ptr[idx] = v;
            break;
        case JS_CLASS_INT16_ARRAY:
        case JS_CLASS_UINT16_ARRAY:
            if (JS_ToInt32Free(ctx, &v, val))
                return -1;
            if (js_unlikely(idx >= (uint32_t)p->u.array.count))
                goto ta_out_of_bound;
            p->u.array.u.uint16_ptr[idx] = v;
            break;
        case JS_CLASS_INT32_ARRAY:
        case JS_CLASS_UINT32_ARRAY:
            if (JS_ToInt32Free(ctx, &v, val))
                return -1;
            if (js_unlikely(idx >= (uint32_t)p->u.array.count))
                goto ta_out_of_bound;
            p->u.array.u.uint32_ptr[idx] = v;
            break;
#ifdef CONFIG_BIGNUM
        case JS_CLASS_BIG_INT64_ARRAY:
        case JS_CLASS_BIG_UINT64_ARRAY:
            /* XXX: need specific conversion function */
            {
                int64_t v;
                if (JS_ToBigInt64Free(ctx, &v, val))
                    return -1;
                if (js_unlikely(idx >= (uint32_t)p->u.array.count))
                    goto ta_out_of_bound;
                p->u.array.u.uint64_ptr[idx] = v;
            }
            break;
#endif
        case JS_CLASS_FLOAT32_ARRAY:
            if (JS_ToFloat64Free(ctx, &d, val))
                return -1;
            if (js_unlikely(idx >= (uint32_t)p->u.array.count))
                goto ta_out_of_bound;
            p->u.array.u.float_ptr[idx] = d;
            break;
        case JS_CLASS_FLOAT64_ARRAY:
            if (JS_ToFloat64Free(ctx, &d, val))
                return -1;
            if (js_unlikely(idx >= (uint32_t)p->u.array.count)) {
            ta_out_of_bound:
                return JS_ThrowTypeErrorOrFalse(ctx, flags, "out-of-bound numeric index");
            }
            p->u.array.u.double_ptr[idx] = d;
            break;
        default:
            goto slow_path;
        }
        return TRUE;
    } else {
        JSAtom atom;
        int ret;
    slow_path:
        atom = JS_ValueToAtom(ctx, prop);
        JS_FreeValue(ctx, prop);
        if (js_unlikely(atom == JS_ATOM_NULL)) {
            JS_FreeValue(ctx, val);
            return -1;
        }
        ret = JS_SetPropertyInternal(ctx, this_obj, atom, val, flags);
        JS_FreeAtom(ctx, atom);
        return ret;
    }
}

inline int JS_SetPropertyUint32(JSContext *ctx, JSValueConst this_obj,
                         uint32_t idx, JSValue val)
{
    return JS_SetPropertyValue(ctx, this_obj, JS_NewUint32(ctx, idx), val,
                               JS_PROP_THROW);
}

inline int JS_SetPropertyInt64(JSContext *ctx, JSValueConst this_obj,
                        int64_t idx, JSValue val)
{
    JSAtom prop;
    int res;

    if ((uint64_t)idx <= INT32_MAX) {
        /* fast path for fast arrays */
        return JS_SetPropertyValue(ctx, this_obj, JS_NewInt32(ctx, idx), val,
                                   JS_PROP_THROW);
    }
    prop = JS_NewAtomInt64(ctx, idx);
    if (prop == JS_ATOM_NULL) {
        JS_FreeValue(ctx, val);
        return -1;
    }
    res = JS_SetProperty(ctx, this_obj, prop, val);
    JS_FreeAtom(ctx, prop);
    return res;
}

inline int JS_SetPropertyStr(JSContext *ctx, JSValueConst this_obj,
                      const char *prop, JSValue val)
{
    JSAtom atom;
    int ret;
    atom = JS_NewAtom(ctx, prop);
    ret = JS_SetPropertyInternal(ctx, this_obj, atom, val, JS_PROP_THROW);
    JS_FreeAtom(ctx, atom);
    return ret;
}

/* compute the property flags. For each flag: (JS_PROP_HAS_x forces
   it, otherwise def_flags is used)
   Note: makes assumption about the bit pattern of the flags
*/
static int get_prop_flags(int flags, int def_flags)
{
    int mask;
    mask = (flags >> JS_PROP_HAS_SHIFT) & JS_PROP_C_W_E;
    return (flags & mask) | (def_flags & ~mask);
}

static int JS_CreateProperty(JSContext *ctx, JSObject *p,
                             JSAtom prop, JSValueConst val,
                             JSValueConst getter, JSValueConst setter,
                             int flags)
{
    JSProperty *pr;
    int ret, prop_flags;

    /* add a new property or modify an existing exotic one */
    if (p->is_exotic) {
        if (p->class_id == JS_CLASS_ARRAY) {
            uint32_t idx, len;

            if (p->fast_array) {
                if (__JS_AtomIsTaggedInt(prop)) {
                    idx = __JS_AtomToUInt32(prop);
                    if (idx == p->u.array.count) {
                        if (!p->extensible)
                            goto not_extensible;
                        if (flags & (JS_PROP_HAS_GET | JS_PROP_HAS_SET))
                            goto convert_to_array;
                        prop_flags = get_prop_flags(flags, 0);
                        if (prop_flags != JS_PROP_C_W_E)
                            goto convert_to_array;
                        return add_fast_array_element(ctx, p,
                                                      JS_DupValue(ctx, val), flags);
                    } else {
                        goto convert_to_array;
                    }
                } else if (JS_AtomIsArrayIndex(ctx, &idx, prop)) {
                    /* convert the fast array to normal array */
                convert_to_array:
                    if (convert_fast_array_to_array(ctx, p))
                        return -1;
                    goto generic_array;
                }
            } else if (JS_AtomIsArrayIndex(ctx, &idx, prop)) {
                JSProperty *plen;
                JSShapeProperty *pslen;
            generic_array:
                /* update the length field */
                plen = &p->prop[0];
                JS_ToUint32(ctx, &len, plen->u.value);
                if ((idx + 1) > len) {
                    pslen = get_shape_prop(p->shape);
                    if (js_unlikely(!(pslen->flags & JS_PROP_WRITABLE)))
                        return JS_ThrowTypeErrorReadOnly(ctx, flags, JS_ATOM_length);
                    /* XXX: should update the length after defining
                       the property */
                    len = idx + 1;
                    set_value(ctx, &plen->u.value, JS_NewUint32(ctx, len));
                }
            }
        } else if (p->class_id >= JS_CLASS_UINT8C_ARRAY &&
                   p->class_id <= JS_CLASS_FLOAT64_ARRAY) {
            ret = JS_AtomIsNumericIndex(ctx, prop);
            if (ret != 0) {
                if (ret < 0)
                    return -1;
                return JS_ThrowTypeErrorOrFalse(ctx, flags, "cannot create numeric index in typed array");
            }
        } else if (!(flags & JS_PROP_NO_EXOTIC)) {
            const JSClassExoticMethods *em = ctx->rt->class_array[p->class_id].exotic;
            if (em) {
                if (em->define_own_property) {
                    return em->define_own_property(ctx, JS_MKPTR(JS_TAG_OBJECT, p),
                                                   prop, val, getter, setter, flags);
                }
                ret = JS_IsExtensible(ctx, JS_MKPTR(JS_TAG_OBJECT, p));
                if (ret < 0)
                    return -1;
                if (!ret)
                    goto not_extensible;
            }
        }
    }

    if (!p->extensible) {
    not_extensible:
        return JS_ThrowTypeErrorOrFalse(ctx, flags, "object is not extensible");
    }

    if (flags & (JS_PROP_HAS_GET | JS_PROP_HAS_SET)) {
        prop_flags = (flags & (JS_PROP_CONFIGURABLE | JS_PROP_ENUMERABLE)) |
            JS_PROP_GETSET;
    } else {
        prop_flags = flags & JS_PROP_C_W_E;
    }
    pr = add_property(ctx, p, prop, prop_flags);
    if (js_unlikely(!pr))
        return -1;
    if (flags & (JS_PROP_HAS_GET | JS_PROP_HAS_SET)) {
        pr->u.getset.getter = NULL;
        if ((flags & JS_PROP_HAS_GET) && JS_IsFunction(ctx, getter)) {
            pr->u.getset.getter =
                JS_VALUE_GET_OBJ(JS_DupValue(ctx, getter));
        }
        pr->u.getset.setter = NULL;
        if ((flags & JS_PROP_HAS_SET) && JS_IsFunction(ctx, setter)) {
            pr->u.getset.setter =
                JS_VALUE_GET_OBJ(JS_DupValue(ctx, setter));
        }
    } else {
        if (flags & JS_PROP_HAS_VALUE) {
            pr->u.value = JS_DupValue(ctx, val);
        } else {
            pr->u.value = JS_UNDEFINED;
        }
    }
    return TRUE;
}

/* return FALSE if not OK */
static BOOL check_define_prop_flags(int prop_flags, int flags)
{
    BOOL has_accessor, is_getset;

    if (!(prop_flags & JS_PROP_CONFIGURABLE)) {
        if ((flags & (JS_PROP_HAS_CONFIGURABLE | JS_PROP_CONFIGURABLE)) ==
            (JS_PROP_HAS_CONFIGURABLE | JS_PROP_CONFIGURABLE)) {
            return FALSE;
        }
        if ((flags & JS_PROP_HAS_ENUMERABLE) &&
            (flags & JS_PROP_ENUMERABLE) != (prop_flags & JS_PROP_ENUMERABLE))
            return FALSE;
    }
    if (flags & (JS_PROP_HAS_VALUE | JS_PROP_HAS_WRITABLE |
                 JS_PROP_HAS_GET | JS_PROP_HAS_SET)) {
        if (!(prop_flags & JS_PROP_CONFIGURABLE)) {
            has_accessor = ((flags & (JS_PROP_HAS_GET | JS_PROP_HAS_SET)) != 0);
            is_getset = ((prop_flags & JS_PROP_TMASK) == JS_PROP_GETSET);
            if (has_accessor != is_getset)
                return FALSE;
            if (!has_accessor && !is_getset && !(prop_flags & JS_PROP_WRITABLE)) {
                /* not writable: cannot set the writable bit */
                if ((flags & (JS_PROP_HAS_WRITABLE | JS_PROP_WRITABLE)) ==
                    (JS_PROP_HAS_WRITABLE | JS_PROP_WRITABLE))
                    return FALSE;
            }
        }
    }
    return TRUE;
}

/* ensure that the shape can be safely modified */
static int js_shape_prepare_update(JSContext *ctx, JSObject *p,
                                   JSShapeProperty **pprs)
{
    JSShape *sh;
    uint32_t idx = 0;    /* prevent warning */

    sh = p->shape;
    if (sh->is_hashed) {
        if (sh->header.ref_count != 1) {
            if (pprs)
                idx = *pprs - get_shape_prop(sh);
            /* clone the shape (the resulting one is no longer hashed) */
            sh = js_clone_shape(ctx, sh);
            if (!sh)
                return -1;
            js_free_shape(ctx->rt, p->shape);
            p->shape = sh;
            if (pprs)
                *pprs = get_shape_prop(sh) + idx;
        } else {
            js_shape_hash_unlink(ctx->rt, sh);
            sh->is_hashed = FALSE;
        }
    }
    return 0;
}

static int js_update_property_flags(JSContext *ctx, JSObject *p,
                                    JSShapeProperty **pprs, int flags)
{
    if (flags != (*pprs)->flags) {
        if (js_shape_prepare_update(ctx, p, pprs))
            return -1;
        (*pprs)->flags = flags;
    }
    return 0;
}

/* allowed flags:
   JS_PROP_CONFIGURABLE, JS_PROP_WRITABLE, JS_PROP_ENUMERABLE
   JS_PROP_HAS_GET, JS_PROP_HAS_SET, JS_PROP_HAS_VALUE,
   JS_PROP_HAS_CONFIGURABLE, JS_PROP_HAS_WRITABLE, JS_PROP_HAS_ENUMERABLE,
   JS_PROP_THROW, JS_PROP_NO_EXOTIC.
   If JS_PROP_THROW is set, return an exception instead of FALSE.
   if JS_PROP_NO_EXOTIC is set, do not call the exotic
   define_own_property callback.
   return -1 (exception), FALSE or TRUE.
*/
inline int JS_DefineProperty(JSContext *ctx, JSValueConst this_obj,
                      JSAtom prop, JSValueConst val,
                      JSValueConst getter, JSValueConst setter, int flags)
{
    JSObject *p;
    JSShapeProperty *prs;
    JSProperty *pr;
    int mask, res;

    if (JS_VALUE_GET_TAG(this_obj) != JS_TAG_OBJECT) {
        JS_ThrowTypeErrorNotAnObject(ctx);
        return -1;
    }
    p = JS_VALUE_GET_OBJ(this_obj);

 redo_prop_update:
    prs = find_own_property(&pr, p, prop);
    if (prs) {
        /* the range of the Array length property is always tested before */
        if ((prs->flags & JS_PROP_LENGTH) && (flags & JS_PROP_HAS_VALUE)) {
            uint32_t array_length;
            if (JS_ToArrayLengthFree(ctx, &array_length,
                                     JS_DupValue(ctx, val), FALSE)) {
                return -1;
            }
            /* this code relies on the fact that Uint32 are never allocated */
            val = (JSValueConst)JS_NewUint32(ctx, array_length);
            /* prs may have been modified */
            prs = find_own_property(&pr, p, prop);
            assert(prs != NULL);
        }
        /* property already exists */
        if (!check_define_prop_flags(prs->flags, flags)) {
        not_configurable:
            return JS_ThrowTypeErrorOrFalse(ctx, flags, "property is not configurable");
        }

        if ((prs->flags & JS_PROP_TMASK) == JS_PROP_AUTOINIT) {
            /* Instantiate property and retry */
            if (JS_AutoInitProperty(ctx, p, prop, pr, prs))
                return -1;
            goto redo_prop_update;
        }

        if (flags & (JS_PROP_HAS_VALUE | JS_PROP_HAS_WRITABLE |
                     JS_PROP_HAS_GET | JS_PROP_HAS_SET)) {
            if (flags & (JS_PROP_HAS_GET | JS_PROP_HAS_SET)) {
                JSObject *new_getter, *new_setter;

                if (JS_IsFunction(ctx, getter)) {
                    new_getter = JS_VALUE_GET_OBJ(getter);
                } else {
                    new_getter = NULL;
                }
                if (JS_IsFunction(ctx, setter)) {
                    new_setter = JS_VALUE_GET_OBJ(setter);
                } else {
                    new_setter = NULL;
                }

                if ((prs->flags & JS_PROP_TMASK) != JS_PROP_GETSET) {
                    if (js_shape_prepare_update(ctx, p, &prs))
                        return -1;
                    /* convert to getset */
                    if ((prs->flags & JS_PROP_TMASK) == JS_PROP_VARREF) {
                        free_var_ref(ctx->rt, pr->u.var_ref);
                    } else {
                        JS_FreeValue(ctx, pr->u.value);
                    }
                    prs->flags = (prs->flags &
                                  (JS_PROP_CONFIGURABLE | JS_PROP_ENUMERABLE)) |
                        JS_PROP_GETSET;
                    pr->u.getset.getter = NULL;
                    pr->u.getset.setter = NULL;
                } else {
                    if (!(prs->flags & JS_PROP_CONFIGURABLE)) {
                        if ((flags & JS_PROP_HAS_GET) &&
                            new_getter != pr->u.getset.getter) {
                            goto not_configurable;
                        }
                        if ((flags & JS_PROP_HAS_SET) &&
                            new_setter != pr->u.getset.setter) {
                            goto not_configurable;
                        }
                    }
                }
                if (flags & JS_PROP_HAS_GET) {
                    if (pr->u.getset.getter)
                        JS_FreeValue(ctx, JS_MKPTR(JS_TAG_OBJECT, pr->u.getset.getter));
                    if (new_getter)
                        JS_DupValue(ctx, getter);
                    pr->u.getset.getter = new_getter;
                }
                if (flags & JS_PROP_HAS_SET) {
                    if (pr->u.getset.setter)
                        JS_FreeValue(ctx, JS_MKPTR(JS_TAG_OBJECT, pr->u.getset.setter));
                    if (new_setter)
                        JS_DupValue(ctx, setter);
                    pr->u.getset.setter = new_setter;
                }
            } else {
                if ((prs->flags & JS_PROP_TMASK) == JS_PROP_GETSET) {
                    /* convert to data descriptor */
                    if (js_shape_prepare_update(ctx, p, &prs))
                        return -1;
                    if (pr->u.getset.getter)
                        JS_FreeValue(ctx, JS_MKPTR(JS_TAG_OBJECT, pr->u.getset.getter));
                    if (pr->u.getset.setter)
                        JS_FreeValue(ctx, JS_MKPTR(JS_TAG_OBJECT, pr->u.getset.setter));
                    prs->flags &= ~(JS_PROP_TMASK | JS_PROP_WRITABLE);
                    pr->u.value = JS_UNDEFINED;
                } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_VARREF) {
                    /* Note: JS_PROP_VARREF is always writable */
                } else {
                    if ((prs->flags & (JS_PROP_CONFIGURABLE | JS_PROP_WRITABLE)) == 0 &&
                        (flags & JS_PROP_HAS_VALUE)) {
                        if (!js_same_value(ctx, val, pr->u.value)) {
                            goto not_configurable;
                        } else {
                            return TRUE;
                        }
                    }
                }
                if ((prs->flags & JS_PROP_TMASK) == JS_PROP_VARREF) {
                    if (flags & JS_PROP_HAS_VALUE) {
                        if (p->class_id == JS_CLASS_MODULE_NS) {
                            /* JS_PROP_WRITABLE is always true for variable
                               references, but they are write protected in module name
                               spaces. */
                            if (!js_same_value(ctx, val, *pr->u.var_ref->pvalue))
                                goto not_configurable;
                        }
                        /* update the reference */
                        set_value(ctx, pr->u.var_ref->pvalue,
                                  JS_DupValue(ctx, val));
                    }
                    /* if writable is set to false, no longer a
                       reference (for mapped arguments) */
                    if ((flags & (JS_PROP_HAS_WRITABLE | JS_PROP_WRITABLE)) == JS_PROP_HAS_WRITABLE) {
                        JSValue val1;
                        if (js_shape_prepare_update(ctx, p, &prs))
                            return -1;
                        val1 = JS_DupValue(ctx, *pr->u.var_ref->pvalue);
                        free_var_ref(ctx->rt, pr->u.var_ref);
                        pr->u.value = val1;
                        prs->flags &= ~(JS_PROP_TMASK | JS_PROP_WRITABLE);
                    }
                } else if (prs->flags & JS_PROP_LENGTH) {
                    if (flags & JS_PROP_HAS_VALUE) {
                        /* Note: no JS code is executable because
                           'val' is guaranted to be a Uint32 */
                        res = set_array_length(ctx, p, JS_DupValue(ctx, val),
                                               flags);
                    } else {
                        res = TRUE;
                    }
                    /* still need to reset the writable flag if
                       needed.  The JS_PROP_LENGTH is kept because the
                       Uint32 test is still done if the length
                       property is read-only. */
                    if ((flags & (JS_PROP_HAS_WRITABLE | JS_PROP_WRITABLE)) ==
                        JS_PROP_HAS_WRITABLE) {
                        prs = get_shape_prop(p->shape);
                        if (js_update_property_flags(ctx, p, &prs,
                                                     prs->flags & ~JS_PROP_WRITABLE))
                            return -1;
                    }
                    return res;
                } else {
                    if (flags & JS_PROP_HAS_VALUE) {
                        JS_FreeValue(ctx, pr->u.value);
                        pr->u.value = JS_DupValue(ctx, val);
                    }
                    if (flags & JS_PROP_HAS_WRITABLE) {
                        if (js_update_property_flags(ctx, p, &prs,
                                                     (prs->flags & ~JS_PROP_WRITABLE) |
                                                     (flags & JS_PROP_WRITABLE)))
                            return -1;
                    }
                }
            }
        }
        mask = 0;
        if (flags & JS_PROP_HAS_CONFIGURABLE)
            mask |= JS_PROP_CONFIGURABLE;
        if (flags & JS_PROP_HAS_ENUMERABLE)
            mask |= JS_PROP_ENUMERABLE;
        if (js_update_property_flags(ctx, p, &prs,
                                     (prs->flags & ~mask) | (flags & mask)))
            return -1;
        return TRUE;
    }

    /* handle modification of fast array elements */
    if (p->fast_array) {
        uint32_t idx;
        uint32_t prop_flags;
        if (p->class_id == JS_CLASS_ARRAY) {
            if (__JS_AtomIsTaggedInt(prop)) {
                idx = __JS_AtomToUInt32(prop);
                if (idx < p->u.array.count) {
                    prop_flags = get_prop_flags(flags, JS_PROP_C_W_E);
                    if (prop_flags != JS_PROP_C_W_E)
                        goto convert_to_slow_array;
                    if (flags & (JS_PROP_HAS_GET | JS_PROP_HAS_SET)) {
                    convert_to_slow_array:
                        if (convert_fast_array_to_array(ctx, p))
                            return -1;
                        else
                            goto redo_prop_update;
                    }
                    if (flags & JS_PROP_HAS_VALUE) {
                        set_value(ctx, &p->u.array.u.values[idx], JS_DupValue(ctx, val));
                    }
                    return TRUE;
                }
            }
        } else if (p->class_id >= JS_CLASS_UINT8C_ARRAY &&
                   p->class_id <= JS_CLASS_FLOAT64_ARRAY) {
            JSValue num;
            int ret;

            if (!__JS_AtomIsTaggedInt(prop)) {
                /* slow path with to handle all numeric indexes */
                num = JS_AtomIsNumericIndex1(ctx, prop);
                if (JS_IsUndefined(num))
                    goto typed_array_done;
                if (JS_IsException(num))
                    return -1;
                ret = JS_NumberIsInteger(ctx, num);
                if (ret < 0) {
                    JS_FreeValue(ctx, num);
                    return -1;
                }
                if (!ret) {
                    JS_FreeValue(ctx, num);
                    return JS_ThrowTypeErrorOrFalse(ctx, flags, "non integer index in typed array");
                }
                ret = JS_NumberIsNegativeOrMinusZero(ctx, num);
                JS_FreeValue(ctx, num);
                if (ret) {
                    return JS_ThrowTypeErrorOrFalse(ctx, flags, "negative index in typed array");
                }
                if (!__JS_AtomIsTaggedInt(prop))
                    goto typed_array_oob;
            }
            idx = __JS_AtomToUInt32(prop);
            /* if the typed array is detached, p->u.array.count = 0 */
            if (idx >= typed_array_get_length(ctx, p)) {
            typed_array_oob:
                return JS_ThrowTypeErrorOrFalse(ctx, flags, "out-of-bound index in typed array");
            }
            prop_flags = get_prop_flags(flags, JS_PROP_ENUMERABLE | JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
            if (flags & (JS_PROP_HAS_GET | JS_PROP_HAS_SET) ||
                prop_flags != (JS_PROP_ENUMERABLE | JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE)) {
                return JS_ThrowTypeErrorOrFalse(ctx, flags, "invalid descriptor flags");
            }
            if (flags & JS_PROP_HAS_VALUE) {
                return JS_SetPropertyValue(ctx, this_obj, JS_NewInt32(ctx, idx), JS_DupValue(ctx, val), flags);
            }
            return TRUE;
        typed_array_done: ;
        }
    }

    return JS_CreateProperty(ctx, p, prop, val, getter, setter, flags);
}

static int JS_DefineAutoInitProperty(JSContext *ctx, JSValueConst this_obj,
                                     JSAtom prop, JSAutoInitIDEnum id,
                                     void *opaque, int flags)
{
    JSObject *p;
    JSProperty *pr;

    if (JS_VALUE_GET_TAG(this_obj) != JS_TAG_OBJECT)
        return FALSE;

    p = JS_VALUE_GET_OBJ(this_obj);

    if (find_own_property(&pr, p, prop)) {
        /* property already exists */
        abort();
        return FALSE;
    }

    /* Specialized CreateProperty */
    pr = add_property(ctx, p, prop, (flags & JS_PROP_C_W_E) | JS_PROP_AUTOINIT);
    if (js_unlikely(!pr))
        return -1;
    pr->u.init.realm_and_id = (uintptr_t)JS_DupContext(ctx);
    assert((pr->u.init.realm_and_id & 3) == 0);
    assert(id <= 3);
    pr->u.init.realm_and_id |= id;
    pr->u.init.opaque = opaque;
    return TRUE;
}

/* shortcut to add or redefine a new property value */
inline int JS_DefinePropertyValue(JSContext *ctx, JSValueConst this_obj,
                           JSAtom prop, JSValue val, int flags)
{
    int ret;
    ret = JS_DefineProperty(ctx, this_obj, prop, val, JS_UNDEFINED, JS_UNDEFINED,
                            flags | JS_PROP_HAS_VALUE | JS_PROP_HAS_CONFIGURABLE | JS_PROP_HAS_WRITABLE | JS_PROP_HAS_ENUMERABLE);
    JS_FreeValue(ctx, val);
    return ret;
}

inline int JS_DefinePropertyValueValue(JSContext *ctx, JSValueConst this_obj,
                                JSValue prop, JSValue val, int flags)
{
    JSAtom atom;
    int ret;
    atom = JS_ValueToAtom(ctx, prop);
    JS_FreeValue(ctx, prop);
    if (js_unlikely(atom == JS_ATOM_NULL)) {
        JS_FreeValue(ctx, val);
        return -1;
    }
    ret = JS_DefinePropertyValue(ctx, this_obj, atom, val, flags);
    JS_FreeAtom(ctx, atom);
    return ret;
}

inline int JS_DefinePropertyValueUint32(JSContext *ctx, JSValueConst this_obj,
                                 uint32_t idx, JSValue val, int flags)
{
    return JS_DefinePropertyValueValue(ctx, this_obj, JS_NewUint32(ctx, idx),
                                       val, flags);
}

inline int JS_DefinePropertyValueInt64(JSContext *ctx, JSValueConst this_obj,
                                int64_t idx, JSValue val, int flags)
{
    return JS_DefinePropertyValueValue(ctx, this_obj, JS_NewInt64(ctx, idx),
                                       val, flags);
}

inline int JS_DefinePropertyValueStr(JSContext *ctx, JSValueConst this_obj,
                              const char *prop, JSValue val, int flags)
{
    JSAtom atom;
    int ret;
    atom = JS_NewAtom(ctx, prop);
    ret = JS_DefinePropertyValue(ctx, this_obj, atom, val, flags);
    JS_FreeAtom(ctx, atom);
    return ret;
}

/* shortcut to add getter & setter */
inline int JS_DefinePropertyGetSet(JSContext *ctx, JSValueConst this_obj,
                            JSAtom prop, JSValue getter, JSValue setter,
                            int flags)
{
    int ret;
    ret = JS_DefineProperty(ctx, this_obj, prop, JS_UNDEFINED, getter, setter,
                            flags | JS_PROP_HAS_GET | JS_PROP_HAS_SET |
                            JS_PROP_HAS_CONFIGURABLE | JS_PROP_HAS_ENUMERABLE);
    JS_FreeValue(ctx, getter);
    JS_FreeValue(ctx, setter);
    return ret;
}

static int JS_CreateDataPropertyUint32(JSContext *ctx, JSValueConst this_obj,
                                       int64_t idx, JSValue val, int flags)
{
    return JS_DefinePropertyValueValue(ctx, this_obj, JS_NewInt64(ctx, idx),
                                       val, flags | JS_PROP_CONFIGURABLE |
                                       JS_PROP_ENUMERABLE | JS_PROP_WRITABLE);
}


/* return TRUE if 'obj' has a non empty 'name' string */
static BOOL js_object_has_name(JSContext *ctx, JSValueConst obj)
{
    JSProperty *pr;
    JSShapeProperty *prs;
    JSValueConst val;
    JSString *p;

    prs = find_own_property(&pr, JS_VALUE_GET_OBJ(obj), JS_ATOM_name);
    if (!prs)
        return FALSE;
    if ((prs->flags & JS_PROP_TMASK) != JS_PROP_NORMAL)
        return TRUE;
    val = pr->u.value;
    if (JS_VALUE_GET_TAG(val) != JS_TAG_STRING)
        return TRUE;
    p = JS_VALUE_GET_STRING(val);
    return (p->len != 0);
}

static int JS_DefineObjectName(JSContext *ctx, JSValueConst obj,
                               JSAtom name, int flags)
{
    if (name != JS_ATOM_NULL
    &&  JS_IsObject(obj)
    &&  !js_object_has_name(ctx, obj)
    &&  JS_DefinePropertyValue(ctx, obj, JS_ATOM_name, JS_AtomToString(ctx, name), flags) < 0) {
        return -1;
    }
    return 0;
}

static int JS_DefineObjectNameComputed(JSContext *ctx, JSValueConst obj,
                                       JSValueConst str, int flags)
{
    if (JS_IsObject(obj) &&
        !js_object_has_name(ctx, obj)) {
        JSAtom prop;
        JSValue name_str;
        prop = JS_ValueToAtom(ctx, str);
        if (prop == JS_ATOM_NULL)
            return -1;
        name_str = js_get_function_name(ctx, prop);
        JS_FreeAtom(ctx, prop);
        if (JS_IsException(name_str))
            return -1;
        if (JS_DefinePropertyValue(ctx, obj, JS_ATOM_name, name_str, flags) < 0)
            return -1;
    }
    return 0;
}

#define DEFINE_GLOBAL_LEX_VAR (1 << 7)
#define DEFINE_GLOBAL_FUNC_VAR (1 << 6)

static JSValue JS_ThrowSyntaxErrorVarRedeclaration(JSContext *ctx, JSAtom prop)
{
    return JS_ThrowSyntaxErrorAtom(ctx, "redeclaration of '%s'", prop);
}

/* flags is 0, DEFINE_GLOBAL_LEX_VAR or DEFINE_GLOBAL_FUNC_VAR */
/* XXX: could support exotic global object. */
static int JS_CheckDefineGlobalVar(JSContext *ctx, JSAtom prop, int flags)
{
    JSObject *p;
    JSShapeProperty *prs;

    p = JS_VALUE_GET_OBJ(ctx->global_obj);
    prs = find_own_property1(p, prop);
    /* XXX: should handle JS_PROP_AUTOINIT */
    if (flags & DEFINE_GLOBAL_LEX_VAR) {
        if (prs && !(prs->flags & JS_PROP_CONFIGURABLE))
            goto fail_redeclaration;
    } else {
        if (!prs && !p->extensible)
            goto define_error;
        if (flags & DEFINE_GLOBAL_FUNC_VAR) {
            if (prs) {
                if (!(prs->flags & JS_PROP_CONFIGURABLE) &&
                    ((prs->flags & JS_PROP_TMASK) == JS_PROP_GETSET ||
                     ((prs->flags & (JS_PROP_WRITABLE | JS_PROP_ENUMERABLE)) !=
                      (JS_PROP_WRITABLE | JS_PROP_ENUMERABLE)))) {
                define_error:
                    JS_ThrowTypeErrorAtom(ctx, "cannot define variable '%s'",
                                          prop);
                    return -1;
                }
            }
        }
    }
    /* check if there already is a lexical declaration */
    p = JS_VALUE_GET_OBJ(ctx->global_var_obj);
    prs = find_own_property1(p, prop);
    if (prs) {
    fail_redeclaration:
        JS_ThrowSyntaxErrorVarRedeclaration(ctx, prop);
        return -1;
    }
    return 0;
}

/* def_flags is (0, DEFINE_GLOBAL_LEX_VAR) |
   JS_PROP_CONFIGURABLE | JS_PROP_WRITABLE */
/* XXX: could support exotic global object. */
static int JS_DefineGlobalVar(JSContext *ctx, JSAtom prop, int def_flags)
{
    JSObject *p;
    JSShapeProperty *prs;
    JSProperty *pr;
    JSValue val;
    int flags;

    if (def_flags & DEFINE_GLOBAL_LEX_VAR) {
        p = JS_VALUE_GET_OBJ(ctx->global_var_obj);
        flags = JS_PROP_ENUMERABLE | (def_flags & JS_PROP_WRITABLE) |
            JS_PROP_CONFIGURABLE;
        val = JS_UNINITIALIZED;
    } else {
        p = JS_VALUE_GET_OBJ(ctx->global_obj);
        flags = JS_PROP_ENUMERABLE | JS_PROP_WRITABLE |
            (def_flags & JS_PROP_CONFIGURABLE);
        val = JS_UNDEFINED;
    }
    prs = find_own_property1(p, prop);
    if (prs)
        return 0;
    if (!p->extensible)
        return 0;
    pr = add_property(ctx, p, prop, flags);
    if (js_unlikely(!pr))
        return -1;
    pr->u.value = val;
    return 0;
}

/* 'def_flags' is 0 or JS_PROP_CONFIGURABLE. */
/* XXX: could support exotic global object. */
static int JS_DefineGlobalFunction(JSContext *ctx, JSAtom prop,
                                   JSValueConst func, int def_flags)
{

    JSObject *p;
    JSShapeProperty *prs;
    int flags;

    p = JS_VALUE_GET_OBJ(ctx->global_obj);
    prs = find_own_property1(p, prop);
    flags = JS_PROP_HAS_VALUE | JS_PROP_THROW;
    if (!prs || (prs->flags & JS_PROP_CONFIGURABLE)) {
        flags |= JS_PROP_ENUMERABLE | JS_PROP_WRITABLE | def_flags |
            JS_PROP_HAS_CONFIGURABLE | JS_PROP_HAS_WRITABLE | JS_PROP_HAS_ENUMERABLE;
    }
    if (JS_DefineProperty(ctx, ctx->global_obj, prop, func,
                          JS_UNDEFINED, JS_UNDEFINED, flags) < 0)
        return -1;
    return 0;
}

static JSValue JS_GetGlobalVar(JSContext *ctx, JSAtom prop,
                               BOOL throw_ref_error)
{
    JSObject *p;
    JSShapeProperty *prs;
    JSProperty *pr;

    /* no exotic behavior is possible in global_var_obj */
    p = JS_VALUE_GET_OBJ(ctx->global_var_obj);
    prs = find_own_property(&pr, p, prop);
    if (prs) {
        /* XXX: should handle JS_PROP_TMASK properties */
        if (js_unlikely(JS_IsUninitialized(pr->u.value)))
            return JS_ThrowReferenceErrorUninitialized(ctx, prs->atom);
        return JS_DupValue(ctx, pr->u.value);
    }
    return JS_GetPropertyInternal(ctx, ctx->global_obj, prop,
                                 ctx->global_obj, throw_ref_error);
}

/* construct a reference to a global variable */
static int JS_GetGlobalVarRef(JSContext *ctx, JSAtom prop, JSValue *sp)
{
    JSObject *p;
    JSShapeProperty *prs;
    JSProperty *pr;

    /* no exotic behavior is possible in global_var_obj */
    p = JS_VALUE_GET_OBJ(ctx->global_var_obj);
    prs = find_own_property(&pr, p, prop);
    if (prs) {
        /* XXX: should handle JS_PROP_AUTOINIT properties? */
        /* XXX: conformance: do these tests in
           OP_put_var_ref/OP_get_var_ref ? */
        if (js_unlikely(JS_IsUninitialized(pr->u.value))) {
            JS_ThrowReferenceErrorUninitialized(ctx, prs->atom);
            return -1;
        }
        if (js_unlikely(!(prs->flags & JS_PROP_WRITABLE))) {
            return JS_ThrowTypeErrorReadOnly(ctx, JS_PROP_THROW, prop);
        }
        sp[0] = JS_DupValue(ctx, ctx->global_var_obj);
    } else {
        int ret;
        ret = JS_HasProperty(ctx, ctx->global_obj, prop);
        if (ret < 0)
            return -1;
        if (ret) {
            sp[0] = JS_DupValue(ctx, ctx->global_obj);
        } else {
            sp[0] = JS_UNDEFINED;
        }
    }
    sp[1] = JS_AtomToValue(ctx, prop);
    return 0;
}

/* use for strict variable access: test if the variable exists */
static int JS_CheckGlobalVar(JSContext *ctx, JSAtom prop)
{
    JSObject *p;
    JSShapeProperty *prs;
    int ret;

    /* no exotic behavior is possible in global_var_obj */
    p = JS_VALUE_GET_OBJ(ctx->global_var_obj);
    prs = find_own_property1(p, prop);
    if (prs) {
        ret = TRUE;
    } else {
        ret = JS_HasProperty(ctx, ctx->global_obj, prop);
        if (ret < 0)
            return -1;
    }
    return ret;
}

/* flag = 0: normal variable write
   flag = 1: initialize lexical variable
   flag = 2: normal variable write, strict check was done before
*/
static int JS_SetGlobalVar(JSContext *ctx, JSAtom prop, JSValue val,
                           int flag)
{
    JSObject *p;
    JSShapeProperty *prs;
    JSProperty *pr;
    int flags;

    /* no exotic behavior is possible in global_var_obj */
    p = JS_VALUE_GET_OBJ(ctx->global_var_obj);
    prs = find_own_property(&pr, p, prop);
    if (prs) {
        /* XXX: should handle JS_PROP_AUTOINIT properties? */
        if (flag != 1) {
            if (js_unlikely(JS_IsUninitialized(pr->u.value))) {
                JS_FreeValue(ctx, val);
                JS_ThrowReferenceErrorUninitialized(ctx, prs->atom);
                return -1;
            }
            if (js_unlikely(!(prs->flags & JS_PROP_WRITABLE))) {
                JS_FreeValue(ctx, val);
                return JS_ThrowTypeErrorReadOnly(ctx, JS_PROP_THROW, prop);
            }
        }
        set_value(ctx, &pr->u.value, val);
        return 0;
    }
    flags = JS_PROP_THROW_STRICT;
    if (is_strict_mode(ctx))
        flags |= JS_PROP_NO_ADD;
    return JS_SetPropertyInternal(ctx, ctx->global_obj, prop, val, flags);
}

/* return -1, FALSE or TRUE. return FALSE if not configurable or
   invalid object. return -1 in case of exception.
   flags can be 0, JS_PROP_THROW or JS_PROP_THROW_STRICT */
inline int JS_DeleteProperty(JSContext *ctx, JSValueConst obj, JSAtom prop, int flags)
{
    JSValue obj1;
    JSObject *p;
    int res;

    obj1 = JS_ToObject(ctx, obj);
    if (JS_IsException(obj1))
        return -1;
    p = JS_VALUE_GET_OBJ(obj1);
    res = delete_property(ctx, p, prop);
    JS_FreeValue(ctx, obj1);
    if (res != FALSE)
        return res;
    if ((flags & JS_PROP_THROW) ||
        ((flags & JS_PROP_THROW_STRICT) && is_strict_mode(ctx))) {
        JS_ThrowTypeError(ctx, "could not delete property");
        return -1;
    }
    return FALSE;
}

inline int JS_DeletePropertyInt64(JSContext *ctx, JSValueConst obj, int64_t idx, int flags)
{
    JSAtom prop;
    int res;

    if ((uint64_t)idx <= JS_ATOM_MAX_INT) {
        /* fast path for fast arrays */
        return JS_DeleteProperty(ctx, obj, __JS_AtomFromUInt32(idx), flags);
    }
    prop = JS_NewAtomInt64(ctx, idx);
    if (prop == JS_ATOM_NULL)
        return -1;
    res = JS_DeleteProperty(ctx, obj, prop, flags);
    JS_FreeAtom(ctx, prop);
    return res;
}

inline BOOL JS_IsFunction(JSContext *ctx, JSValueConst val)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(val) != JS_TAG_OBJECT)
        return FALSE;
    p = JS_VALUE_GET_OBJ(val);
    switch(p->class_id) {
    case JS_CLASS_BYTECODE_FUNCTION:
        return TRUE;
    case JS_CLASS_PROXY:
        return p->u.proxy_data->is_func;
    default:
        return (ctx->rt->class_array[p->class_id].call != NULL);
    }
}

inline BOOL JS_IsCFunction(JSContext *ctx, JSValueConst val, JSCFunction *func, int magic)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(val) != JS_TAG_OBJECT)
        return FALSE;
    p = JS_VALUE_GET_OBJ(val);
    if (p->class_id == JS_CLASS_C_FUNCTION)
        return (p->u.cfunc.c_function.generic == func && p->u.cfunc.magic == magic);
    else
        return FALSE;
}

inline BOOL JS_IsConstructor(JSContext *ctx, JSValueConst val)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(val) != JS_TAG_OBJECT)
        return FALSE;
    p = JS_VALUE_GET_OBJ(val);
    return p->is_constructor;
}

inline BOOL JS_SetConstructorBit(JSContext *ctx, JSValueConst func_obj, BOOL val)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(func_obj) != JS_TAG_OBJECT)
        return FALSE;
    p = JS_VALUE_GET_OBJ(func_obj);
    p->is_constructor = val;
    return TRUE;
}

inline BOOL JS_IsError(JSContext *ctx, JSValueConst val)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(val) != JS_TAG_OBJECT)
        return FALSE;
    p = JS_VALUE_GET_OBJ(val);
    return (p->class_id == JS_CLASS_ERROR);
}

/* used to avoid catching interrupt exceptions */
inline BOOL JS_IsUncatchableError(JSContext *ctx, JSValueConst val)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(val) != JS_TAG_OBJECT)
        return FALSE;
    p = JS_VALUE_GET_OBJ(val);
    return p->class_id == JS_CLASS_ERROR && p->is_uncatchable_error;
}

inline void JS_SetUncatchableError(JSContext *ctx, JSValueConst val, BOOL flag)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(val) != JS_TAG_OBJECT)
        return;
    p = JS_VALUE_GET_OBJ(val);
    if (p->class_id == JS_CLASS_ERROR)
        p->is_uncatchable_error = flag;
}

inline void JS_ResetUncatchableError(JSContext *ctx)
{
    JS_SetUncatchableError(ctx, ctx->rt->current_exception, FALSE);
}

inline void JS_SetOpaque(JSValue obj, void *opaque)
{
   JSObject *p;
    if (JS_VALUE_GET_TAG(obj) == JS_TAG_OBJECT) {
        p = JS_VALUE_GET_OBJ(obj);
        p->u.opaque = opaque;
    }
}

/* return NULL if not an object of class class_id */
inline void *JS_GetOpaque(JSValueConst obj, JSClassID class_id)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return NULL;
    p = JS_VALUE_GET_OBJ(obj);
    if (p->class_id != class_id)
        return NULL;
    return p->u.opaque;
}

inline void *JS_GetOpaque2(JSContext *ctx, JSValueConst obj, JSClassID class_id)
{
    void *p = JS_GetOpaque(obj, class_id);
    if (js_unlikely(!p)) {
        JS_ThrowTypeErrorInvalidClass(ctx, class_id);
    }
    return p;
}

#define HINT_STRING  0
#define HINT_NUMBER  1
#define HINT_NONE    2
/* don't try Symbol.toPrimitive */
#define HINT_FORCE_ORDINARY (1 << 4)

static JSValue JS_ToPrimitiveFree(JSContext *ctx, JSValue val, int hint)
{
    int i;
    BOOL force_ordinary;

    JSAtom method_name;
    JSValue method, ret;
    if (JS_VALUE_GET_TAG(val) != JS_TAG_OBJECT)
        return val;
    force_ordinary = hint & HINT_FORCE_ORDINARY;
    hint &= ~HINT_FORCE_ORDINARY;
    if (!force_ordinary) {
        method = JS_GetProperty(ctx, val, JS_ATOM_Symbol_toPrimitive);
        if (JS_IsException(method))
            goto exception;
        /* ECMA says *If exoticToPrim is not undefined* but tests in
           test262 use null as a non callable converter */
        if (!JS_IsUndefined(method) && !JS_IsNull(method)) {
            JSAtom atom;
            JSValue arg;
            switch(hint) {
            case HINT_STRING:
                atom = JS_ATOM_string;
                break;
            case HINT_NUMBER:
                atom = JS_ATOM_number;
                break;
            default:
            case HINT_NONE:
                atom = JS_ATOM_default;
                break;
            }
            arg = JS_AtomToString(ctx, atom);
            ret = JS_CallFree(ctx, method, val, 1, (JSValueConst *)&arg);
            JS_FreeValue(ctx, arg);
            if (JS_IsException(ret))
                goto exception;
            JS_FreeValue(ctx, val);
            if (JS_VALUE_GET_TAG(ret) != JS_TAG_OBJECT)
                return ret;
            JS_FreeValue(ctx, ret);
            return JS_ThrowTypeError(ctx, "toPrimitive");
        }
    }
    if (hint != HINT_STRING)
        hint = HINT_NUMBER;
    for(i = 0; i < 2; i++) {
        if ((i ^ hint) == 0) {
            method_name = JS_ATOM_toString;
        } else {
            method_name = JS_ATOM_valueOf;
        }
        method = JS_GetProperty(ctx, val, method_name);
        if (JS_IsException(method))
            goto exception;
        if (JS_IsFunction(ctx, method)) {
            ret = JS_CallFree(ctx, method, val, 0, NULL);
            if (JS_IsException(ret))
                goto exception;
            if (JS_VALUE_GET_TAG(ret) != JS_TAG_OBJECT) {
                JS_FreeValue(ctx, val);
                return ret;
            }
            JS_FreeValue(ctx, ret);
        } else {
            JS_FreeValue(ctx, method);
        }
    }
    JS_ThrowTypeError(ctx, "toPrimitive");
exception:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static JSValue JS_ToPrimitive(JSContext *ctx, JSValueConst val, int hint)
{
    return JS_ToPrimitiveFree(ctx, JS_DupValue(ctx, val), hint);
}

inline void JS_SetIsHTMLDDA(JSContext *ctx, JSValueConst obj)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return;
    p = JS_VALUE_GET_OBJ(obj);
    p->is_HTMLDDA = TRUE;
}

static inline BOOL JS_IsHTMLDDA(JSContext *ctx, JSValueConst obj)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return FALSE;
    p = JS_VALUE_GET_OBJ(obj);
    return p->is_HTMLDDA;
}

static int JS_ToBoolFree(JSContext *ctx, JSValue val)
{
    uint32_t tag = JS_VALUE_GET_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
        return JS_VALUE_GET_INT(val) != 0;
    case JS_TAG_BOOL:
    case JS_TAG_NULL:
    case JS_TAG_UNDEFINED:
        return JS_VALUE_GET_INT(val);
    case JS_TAG_EXCEPTION:
        return -1;
    case JS_TAG_STRING:
        {
            BOOL ret = JS_VALUE_GET_STRING(val)->len != 0;
            JS_FreeValue(ctx, val);
            return ret;
        }
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            BOOL ret;
            ret = p->num.expn != BF_EXP_ZERO && p->num.expn != BF_EXP_NAN;
            JS_FreeValue(ctx, val);
            return ret;
        }
    case JS_TAG_BIG_DECIMAL:
        {
            JSBigDecimal *p = JS_VALUE_GET_PTR(val);
            BOOL ret;
            ret = p->num.expn != BF_EXP_ZERO && p->num.expn != BF_EXP_NAN;
            JS_FreeValue(ctx, val);
            return ret;
        }
#endif
    case JS_TAG_OBJECT:
        {
            JSObject *p = JS_VALUE_GET_OBJ(val);
            BOOL ret;
            ret = !p->is_HTMLDDA;
            JS_FreeValue(ctx, val);
            return ret;
        }
        break;
    default:
        if (JS_TAG_IS_FLOAT64(tag)) {
            double d = JS_VALUE_GET_FLOAT64(val);
            return !isnan(d) && d != 0;
        } else {
            JS_FreeValue(ctx, val);
            return TRUE;
        }
    }
}

inline int JS_ToBool(JSContext *ctx, JSValueConst val)
{
    return JS_ToBoolFree(ctx, JS_DupValue(ctx, val));
}

static int skip_spaces(const char *pc)
{
    const uint8_t *p, *p_next, *p_start;
    uint32_t c;

    p = p_start = (const uint8_t *)pc;
    for (;;) {
        c = *p;
        if (c < 128) {
            if (!((c >= 0x09 && c <= 0x0d) || (c == 0x20)))
                break;
            p++;
        } else {
            c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p_next);
            if (!lre_is_space(c))
                break;
            p = p_next;
        }
    }
    return p - p_start;
}

static inline int to_digit(int c)
{
    if (c >= '0' && c <= '9')
        return c - '0';
    else if (c >= 'A' && c <= 'Z')
        return c - 'A' + 10;
    else if (c >= 'a' && c <= 'z')
        return c - 'a' + 10;
    else
        return 36;
}

/* XXX: remove */
static double js_strtod(const char *p, int radix, BOOL is_float)
{
    double d;
    int c;

    if (!is_float || radix != 10) {
        uint64_t n_max, n;
        int int_exp, is_neg;

        is_neg = 0;
        if (*p == '-') {
            is_neg = 1;
            p++;
        }

        /* skip leading zeros */
        while (*p == '0')
            p++;
        n = 0;
        if (radix == 10)
            n_max = ((uint64_t)-1 - 9) / 10; /* most common case */
        else
            n_max = ((uint64_t)-1 - (radix - 1)) / radix;
        /* XXX: could be more precise */
        int_exp = 0;
        while (*p != '\0') {
            c = to_digit((uint8_t)*p);
            if (c >= radix)
                break;
            if (n <= n_max) {
                n = n * radix + c;
            } else {
                int_exp++;
            }
            p++;
        }
        d = n;
        if (int_exp != 0) {
            d *= pow(radix, int_exp);
        }
        if (is_neg)
            d = -d;
    } else {
        d = strtod(p, NULL);
    }
    return d;
}

#define ATOD_INT_ONLY        (1 << 0)
/* accept Oo and Ob prefixes in addition to 0x prefix if radix = 0 */
#define ATOD_ACCEPT_BIN_OCT  (1 << 2)
/* accept O prefix as octal if radix == 0 and properly formed (Annex B) */
#define ATOD_ACCEPT_LEGACY_OCTAL  (1 << 4)
/* accept _ between digits as a digit separator */
#define ATOD_ACCEPT_UNDERSCORES  (1 << 5)
/* allow a suffix to override the type */
#define ATOD_ACCEPT_SUFFIX    (1 << 6)
/* default type */
#define ATOD_TYPE_MASK        (3 << 7)
#define ATOD_TYPE_FLOAT64     (0 << 7)
#define ATOD_TYPE_BIG_INT     (1 << 7)
#define ATOD_TYPE_BIG_FLOAT   (2 << 7)
#define ATOD_TYPE_BIG_DECIMAL (3 << 7)
/* assume bigint mode: floats are parsed as integers if no decimal
   point nor exponent */
#define ATOD_MODE_BIGINT      (1 << 9)
/* accept -0x1 */
#define ATOD_ACCEPT_PREFIX_AFTER_SIGN (1 << 10)

#ifdef CONFIG_BIGNUM
static JSValue js_string_to_bigint(JSContext *ctx, const char *buf,
                                   int radix, int flags, slimb_t *pexponent)
{
    bf_t a_s, *a = &a_s;
    int ret;
    JSValue val;
    val = JS_NewBigInt(ctx);
    if (JS_IsException(val))
        return val;
    a = JS_GetBigInt(val);
    ret = bf_atof(a, buf, NULL, radix, BF_PREC_INF, BF_RNDZ);
    if (ret & BF_ST_MEM_ERROR) {
        JS_FreeValue(ctx, val);
        return JS_ThrowOutOfMemory(ctx);
    }
    val = JS_CompactBigInt1(ctx, val, (flags & ATOD_MODE_BIGINT) != 0);
    return val;
}

static JSValue js_string_to_bigfloat(JSContext *ctx, const char *buf,
                                     int radix, int flags, slimb_t *pexponent)
{
    bf_t *a;
    int ret;
    JSValue val;

    val = JS_NewBigFloat(ctx);
    if (JS_IsException(val))
        return val;
    a = JS_GetBigFloat(val);
    if (flags & ATOD_ACCEPT_SUFFIX) {
        /* return the exponent to get infinite precision */
        ret = bf_atof2(a, pexponent, buf, NULL, radix, BF_PREC_INF,
                       BF_RNDZ | BF_ATOF_EXPONENT);
    } else {
        ret = bf_atof(a, buf, NULL, radix, ctx->fp_env.prec,
                      ctx->fp_env.flags);
    }
    if (ret & BF_ST_MEM_ERROR) {
        JS_FreeValue(ctx, val);
        return JS_ThrowOutOfMemory(ctx);
    }
    return val;
}

static JSValue js_string_to_bigdecimal(JSContext *ctx, const char *buf,
                                       int radix, int flags, slimb_t *pexponent)
{
    bfdec_t *a;
    int ret;
    JSValue val;

    val = JS_NewBigDecimal(ctx);
    if (JS_IsException(val))
        return val;
    a = JS_GetBigDecimal(val);
    ret = bfdec_atof(a, buf, NULL, BF_PREC_INF,
                     BF_RNDZ | BF_ATOF_NO_NAN_INF);
    if (ret & BF_ST_MEM_ERROR) {
        JS_FreeValue(ctx, val);
        return JS_ThrowOutOfMemory(ctx);
    }
    return val;
}

#endif

/* return an exception in case of memory error. Return JS_NAN if
   invalid syntax */
#ifdef CONFIG_BIGNUM
static JSValue js_atof2(JSContext *ctx, const char *str, const char **pp,
                        int radix, int flags, slimb_t *pexponent)
#else
static JSValue js_atof(JSContext *ctx, const char *str, const char **pp,
                       int radix, int flags)
#endif
{
    const char *p, *p_start;
    int sep, is_neg;
    BOOL is_float, has_legacy_octal;
    int atod_type = flags & ATOD_TYPE_MASK;
    char buf1[64], *buf = nullptr;
    int i, j, len;
    BOOL buf_allocated = FALSE;
    JSValue val;

    /* optional separator between digits */
    sep = (flags & ATOD_ACCEPT_UNDERSCORES) ? '_' : 256;
    has_legacy_octal = FALSE;

    p = str;
    p_start = p;
    is_neg = 0;
    if (p[0] == '+') {
        p++;
        p_start++;
        if (!(flags & ATOD_ACCEPT_PREFIX_AFTER_SIGN))
            goto no_radix_prefix;
    } else if (p[0] == '-') {
        p++;
        p_start++;
        is_neg = 1;
        if (!(flags & ATOD_ACCEPT_PREFIX_AFTER_SIGN))
            goto no_radix_prefix;
    }
    if (p[0] == '0') {
        if ((p[1] == 'x' || p[1] == 'X') &&
            (radix == 0 || radix == 16)) {
            p += 2;
            radix = 16;
        } else if ((p[1] == 'o' || p[1] == 'O') &&
                   radix == 0 && (flags & ATOD_ACCEPT_BIN_OCT)) {
            p += 2;
            radix = 8;
        } else if ((p[1] == 'b' || p[1] == 'B') &&
                   radix == 0 && (flags & ATOD_ACCEPT_BIN_OCT)) {
            p += 2;
            radix = 2;
        } else if ((p[1] >= '0' && p[1] <= '9') &&
                   radix == 0 && (flags & ATOD_ACCEPT_LEGACY_OCTAL)) {
            int i;
            has_legacy_octal = TRUE;
            sep = 256;
            for (i = 1; (p[i] >= '0' && p[i] <= '7'); i++)
                continue;
            if (p[i] == '8' || p[i] == '9')
                goto no_prefix;
            p += 1;
            radix = 8;
        } else {
            goto no_prefix;
        }
        /* there must be a digit after the prefix */
        if (to_digit((uint8_t)*p) >= radix)
            goto fail;
    no_prefix: ;
    } else {
 no_radix_prefix:
        if (!(flags & ATOD_INT_ONLY) &&
            (atod_type == ATOD_TYPE_FLOAT64 ||
             atod_type == ATOD_TYPE_BIG_FLOAT) &&
            strstart(p, "Infinity", &p)) {
#ifdef CONFIG_BIGNUM
            if (atod_type == ATOD_TYPE_BIG_FLOAT) {
                bf_t *a;
                val = JS_NewBigFloat(ctx);
                if (JS_IsException(val))
                    goto done;
                a = JS_GetBigFloat(val);
                bf_set_inf(a, is_neg);
            } else
#endif
            {
                double d = std::numeric_limits<double>::infinity();
                if (is_neg)
                    d = -d;
                val = JS_NewFloat64(ctx, d);
            }
            goto done;
        }
    }
    if (radix == 0)
        radix = 10;
    is_float = FALSE;
    p_start = p;
    while (to_digit((uint8_t)*p) < radix
           ||  (*p == sep && (radix != 10 ||
                              p != p_start + 1 || p[-1] != '0') &&
                to_digit((uint8_t)p[1]) < radix)) {
        p++;
    }
    if (!(flags & ATOD_INT_ONLY)) {
        if (*p == '.' && (p > p_start || to_digit((uint8_t)p[1]) < radix)) {
            is_float = TRUE;
            p++;
            if (*p == sep)
                goto fail;
            while (to_digit((uint8_t)*p) < radix ||
                   (*p == sep && to_digit((uint8_t)p[1]) < radix))
                p++;
        }
        if (p > p_start &&
            (((*p == 'e' || *p == 'E') && radix == 10) ||
             ((*p == 'p' || *p == 'P') && (radix == 2 || radix == 8 || radix == 16)))) {
            const char *p1 = p + 1;
            is_float = TRUE;
            if (*p1 == '+') {
                p1++;
            } else if (*p1 == '-') {
                p1++;
            }
            if (is_digit((uint8_t)*p1)) {
                p = p1 + 1;
                while (is_digit((uint8_t)*p) || (*p == sep && is_digit((uint8_t)p[1])))
                    p++;
            }
        }
    }
    if (p == p_start)
        goto fail;

    buf = buf1;
    buf_allocated = FALSE;
    len = p - p_start;
    if (js_unlikely((len + 2) > sizeof(buf1))) {
        buf = (char*) js_malloc_rt(ctx->rt, len + 2); /* no exception raised */
        if (!buf)
            goto mem_error;
        buf_allocated = TRUE;
    }
    /* remove the separators and the radix prefixes */
    j = 0;
    if (is_neg)
        buf[j++] = '-';
    for (i = 0; i < len; i++) {
        if (p_start[i] != '_')
            buf[j++] = p_start[i];
    }
    buf[j] = '\0';

#ifdef CONFIG_BIGNUM
    if (flags & ATOD_ACCEPT_SUFFIX) {
        if (*p == 'n') {
            p++;
            atod_type = ATOD_TYPE_BIG_INT;
        } else if (*p == 'l') {
            p++;
            atod_type = ATOD_TYPE_BIG_FLOAT;
        } else if (*p == 'm') {
            p++;
            atod_type = ATOD_TYPE_BIG_DECIMAL;
        } else {
            if (flags & ATOD_MODE_BIGINT) {
                if (!is_float)
                    atod_type = ATOD_TYPE_BIG_INT;
                if (has_legacy_octal)
                    goto fail;
            } else {
                if (is_float && radix != 10)
                    goto fail;
            }
        }
    } else {
        if (atod_type == ATOD_TYPE_FLOAT64) {
            if (flags & ATOD_MODE_BIGINT) {
                if (!is_float)
                    atod_type = ATOD_TYPE_BIG_INT;
                if (has_legacy_octal)
                    goto fail;
            } else {
                if (is_float && radix != 10)
                    goto fail;
            }
        }
    }

    switch(atod_type) {
    case ATOD_TYPE_FLOAT64:
        {
            double d;
            d = js_strtod(buf, radix, is_float);
            /* return int or float64 */
            val = JS_NewFloat64(ctx, d);
        }
        break;
    case ATOD_TYPE_BIG_INT:
        if (has_legacy_octal || is_float)
            goto fail;
        val = ctx->rt->bigint_ops.from_string(ctx, buf, radix, flags, NULL);
        break;
    case ATOD_TYPE_BIG_FLOAT:
        if (has_legacy_octal)
            goto fail;
        val = ctx->rt->bigfloat_ops.from_string(ctx, buf, radix, flags,
                                                pexponent);
        break;
    case ATOD_TYPE_BIG_DECIMAL:
        if (radix != 10)
            goto fail;
        val = ctx->rt->bigdecimal_ops.from_string(ctx, buf, radix, flags, NULL);
        break;
    default:
        abort();
    }
#else
    {
        double d;
        (void)has_legacy_octal;
        if (is_float && radix != 10)
            goto fail;
        d = js_strtod(buf, radix, is_float);
        val = JS_NewFloat64(ctx, d);
    }
#endif

done:
    if (buf_allocated)
        js_free_rt(ctx->rt, buf);
    if (pp)
        *pp = p;
    return val;
 fail:
    val = JS_NAN;
    goto done;
 mem_error:
    val = JS_ThrowOutOfMemory(ctx);
    goto done;
}

#ifdef CONFIG_BIGNUM
static JSValue js_atof(JSContext *ctx, const char *str, const char **pp,
                       int radix, int flags)
{
    return js_atof2(ctx, str, pp, radix, flags, NULL);
}
#endif

typedef enum JSToNumberHintEnum {
    TON_FLAG_NUMBER,
    TON_FLAG_NUMERIC,
} JSToNumberHintEnum;

static JSValue JS_ToNumberHintFree(JSContext *ctx, JSValue val,
                                   JSToNumberHintEnum flag)
{
    uint32_t tag;
    JSValue ret;

 redo:
    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_DECIMAL:
        if (flag != TON_FLAG_NUMERIC) {
            JS_FreeValue(ctx, val);
            return JS_ThrowTypeError(ctx, "cannot convert bigdecimal to number");
        }
        ret = val;
        break;
    case JS_TAG_BIG_INT:
        if (flag != TON_FLAG_NUMERIC) {
            JS_FreeValue(ctx, val);
            return JS_ThrowTypeError(ctx, "cannot convert bigint to number");
        }
        ret = val;
        break;
    case JS_TAG_BIG_FLOAT:
        if (flag != TON_FLAG_NUMERIC) {
            JS_FreeValue(ctx, val);
            return JS_ThrowTypeError(ctx, "cannot convert bigfloat to number");
        }
        ret = val;
        break;
#endif
    case JS_TAG_FLOAT64:
    case JS_TAG_INT:
    case JS_TAG_EXCEPTION:
        ret = val;
        break;
    case JS_TAG_BOOL:
    case JS_TAG_NULL:
        ret = JS_NewInt32(ctx, JS_VALUE_GET_INT(val));
        break;
    case JS_TAG_UNDEFINED:
        ret = JS_NAN;
        break;
    case JS_TAG_OBJECT:
        val = JS_ToPrimitiveFree(ctx, val, HINT_NUMBER);
        if (JS_IsException(val))
            return JS_EXCEPTION;
        goto redo;
    case JS_TAG_STRING:
        {
            const char *str;
            const char *p;
            size_t len;

            str = JS_ToCStringLen(ctx, &len, val);
            JS_FreeValue(ctx, val);
            if (!str)
                return JS_EXCEPTION;
            p = str;
            p += skip_spaces(p);
            if ((p - str) == len) {
                ret = JS_NewInt32(ctx, 0);
            } else {
                int flags = ATOD_ACCEPT_BIN_OCT;
                ret = js_atof(ctx, p, &p, 0, flags);
                if (!JS_IsException(ret)) {
                    p += skip_spaces(p);
                    if ((p - str) != len) {
                        JS_FreeValue(ctx, ret);
                        ret = JS_NAN;
                    }
                }
            }
            JS_FreeCString(ctx, str);
        }
        break;
    case JS_TAG_SYMBOL:
        JS_FreeValue(ctx, val);
        return JS_ThrowTypeError(ctx, "cannot convert symbol to number");
    default:
        JS_FreeValue(ctx, val);
        ret = JS_NAN;
        break;
    }
    return ret;
}

static JSValue JS_ToNumberFree(JSContext *ctx, JSValue val)
{
    return JS_ToNumberHintFree(ctx, val, TON_FLAG_NUMBER);
}

static JSValue JS_ToNumericFree(JSContext *ctx, JSValue val)
{
    return JS_ToNumberHintFree(ctx, val, TON_FLAG_NUMERIC);
}

static JSValue JS_ToNumeric(JSContext *ctx, JSValueConst val)
{
    return JS_ToNumericFree(ctx, JS_DupValue(ctx, val));
}

[[nodiscard]] static int __JS_ToFloat64Free(JSContext *ctx, double *pres,
                                          JSValue val)
{
    double d;
    uint32_t tag;

    val = JS_ToNumberFree(ctx, val);
    if (JS_IsException(val)) {
        *pres = JS_FLOAT64_NAN;
        return -1;
    }
    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
        d = JS_VALUE_GET_INT(val);
        break;
    case JS_TAG_FLOAT64:
        d = JS_VALUE_GET_FLOAT64(val);
        break;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            /* XXX: there can be a double rounding issue with some
               primitives (such as JS_ToUint8ClampFree()), but it is
               not critical to fix it. */
            bf_get_float64(&p->num, &d, BF_RNDN);
            JS_FreeValue(ctx, val);
        }
        break;
#endif
    default:
        abort();
    }
    *pres = d;
    return 0;
}

inline int JS_ToFloat64Free(JSContext *ctx, double *pres, JSValue val)
{
    uint32_t tag;

    tag = JS_VALUE_GET_TAG(val);
    if (tag <= JS_TAG_NULL) {
        *pres = JS_VALUE_GET_INT(val);
        return 0;
    } else if (JS_TAG_IS_FLOAT64(tag)) {
        *pres = JS_VALUE_GET_FLOAT64(val);
        return 0;
    } else {
        return __JS_ToFloat64Free(ctx, pres, val);
    }
}

inline int JS_ToFloat64(JSContext *ctx, double *pres, JSValueConst val)
{
    return JS_ToFloat64Free(ctx, pres, JS_DupValue(ctx, val));
}

inline JSValue JS_ToNumber(JSContext *ctx, JSValueConst val)
{
    return JS_ToNumberFree(ctx, JS_DupValue(ctx, val));
}

/* same as JS_ToNumber() but return 0 in case of NaN/Undefined */
inline JSValue JS_ToIntegerFree(JSContext *ctx, JSValue val)
{
    uint32_t tag;
    JSValue ret;

 redo:
    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
    case JS_TAG_BOOL:
    case JS_TAG_NULL:
    case JS_TAG_UNDEFINED:
        ret = JS_NewInt32(ctx, JS_VALUE_GET_INT(val));
        break;
    case JS_TAG_FLOAT64:
        {
            double d = JS_VALUE_GET_FLOAT64(val);
            if (isnan(d)) {
                ret = JS_NewInt32(ctx, 0);
            } else {
                /* convert -0 to +0 */
                d = trunc(d) + 0.0;
                ret = JS_NewFloat64(ctx, d);
            }
        }
        break;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_FLOAT:
        {
            bf_t a_s, *a, r_s, *r = &r_s;
            BOOL is_nan;

            a = JS_ToBigFloat(ctx, &a_s, val);
            if (!bf_is_finite(a)) {
                is_nan = bf_is_nan(a);
                if (is_nan)
                    ret = JS_NewInt32(ctx, 0);
                else
                    ret = JS_DupValue(ctx, val);
            } else {
                ret = JS_NewBigInt(ctx);
                if (!JS_IsException(ret)) {
                    r = JS_GetBigInt(ret);
                    bf_set(r, a);
                    bf_rint(r, BF_RNDZ);
                    ret = JS_CompactBigInt(ctx, ret);
                }
            }
            if (a == &a_s)
                bf_delete(a);
            JS_FreeValue(ctx, val);
        }
        break;
#endif
    default:
        val = JS_ToNumberFree(ctx, val);
        if (JS_IsException(val))
            return val;
        goto redo;
    }
    return ret;
}

/* Note: the integer value is satured to 32 bits */
static int JS_ToInt32SatFree(JSContext *ctx, int *pres, JSValue val)
{
    uint32_t tag;
    int ret;

 redo:
    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
    case JS_TAG_BOOL:
    case JS_TAG_NULL:
    case JS_TAG_UNDEFINED:
        ret = JS_VALUE_GET_INT(val);
        break;
    case JS_TAG_EXCEPTION:
        *pres = 0;
        return -1;
    case JS_TAG_FLOAT64:
        {
            double d = JS_VALUE_GET_FLOAT64(val);
            if (isnan(d)) {
                ret = 0;
            } else {
                if (d < INT32_MIN)
                    ret = INT32_MIN;
                else if (d > INT32_MAX)
                    ret = INT32_MAX;
                else
                    ret = (int)d;
            }
        }
        break;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            bf_get_int32(&ret, &p->num, 0);
            JS_FreeValue(ctx, val);
        }
        break;
#endif
    default:
        val = JS_ToNumberFree(ctx, val);
        if (JS_IsException(val)) {
            *pres = 0;
            return -1;
        }
        goto redo;
    }
    *pres = ret;
    return 0;
}

inline int JS_ToInt32Sat(JSContext *ctx, int *pres, JSValueConst val)
{
    return JS_ToInt32SatFree(ctx, pres, JS_DupValue(ctx, val));
}

inline int JS_ToInt32Clamp(JSContext *ctx, int *pres, JSValueConst val,
                    int min, int max, int min_offset)
{
    int res = JS_ToInt32SatFree(ctx, pres, JS_DupValue(ctx, val));
    if (res == 0) {
        if (*pres < min) {
            *pres += min_offset;
            if (*pres < min)
                *pres = min;
        } else {
            if (*pres > max)
                *pres = max;
        }
    }
    return res;
}

static int JS_ToInt64SatFree(JSContext *ctx, int64_t *pres, JSValue val)
{
    uint32_t tag;

 redo:
    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
    case JS_TAG_BOOL:
    case JS_TAG_NULL:
    case JS_TAG_UNDEFINED:
        *pres = JS_VALUE_GET_INT(val);
        return 0;
    case JS_TAG_EXCEPTION:
        *pres = 0;
        return -1;
    case JS_TAG_FLOAT64:
        {
            double d = JS_VALUE_GET_FLOAT64(val);
            if (isnan(d)) {
                *pres = 0;
            } else {
                if (d < INT64_MIN)
                    *pres = INT64_MIN;
                else if (d > INT64_MAX)
                    *pres = INT64_MAX;
                else
                    *pres = (int64_t)d;
            }
        }
        return 0;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            bf_get_int64(pres, &p->num, 0);
            JS_FreeValue(ctx, val);
        }
        return 0;
#endif
    default:
        val = JS_ToNumberFree(ctx, val);
        if (JS_IsException(val)) {
            *pres = 0;
            return -1;
        }
        goto redo;
    }
}

inline int JS_ToInt64Sat(JSContext *ctx, int64_t *pres, JSValueConst val)
{
    return JS_ToInt64SatFree(ctx, pres, JS_DupValue(ctx, val));
}

inline int JS_ToInt64Clamp(JSContext *ctx, int64_t *pres, JSValueConst val,
                    int64_t min, int64_t max, int64_t neg_offset)
{
    int res = JS_ToInt64SatFree(ctx, pres, JS_DupValue(ctx, val));
    if (res == 0) {
        if (*pres < 0)
            *pres += neg_offset;
        if (*pres < min)
            *pres = min;
        else if (*pres > max)
            *pres = max;
    }
    return res;
}

/* Same as JS_ToInt32Free() but with a 64 bit result. Return (<0, 0)
   in case of exception */
static int JS_ToInt64Free(JSContext *ctx, int64_t *pres, JSValue val)
{
    uint32_t tag;
    int64_t ret;

 redo:
    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
    case JS_TAG_BOOL:
    case JS_TAG_NULL:
    case JS_TAG_UNDEFINED:
        ret = JS_VALUE_GET_INT(val);
        break;
    case JS_TAG_FLOAT64:
        {
            JSFloat64Union u;
            double d;
            int e;
            d = JS_VALUE_GET_FLOAT64(val);
            u.d = d;
            /* we avoid doing fmod(x, 2^64) */
            e = (u.u64 >> 52) & 0x7ff;
            if (js_likely(e <= (1023 + 62))) {
                /* fast case */
                ret = (int64_t)d;
            } else if (e <= (1023 + 62 + 53)) {
                uint64_t v;
                /* remainder modulo 2^64 */
                v = (u.u64 & (((uint64_t)1 << 52) - 1)) | ((uint64_t)1 << 52);
                ret = v << ((e - 1023) - 52);
                /* take the sign into account */
                if (u.u64 >> 63)
                    ret = -ret;
            } else {
                ret = 0; /* also handles NaN and +inf */
            }
        }
        break;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            bf_get_int64(&ret, &p->num, BF_GET_INT_MOD);
            JS_FreeValue(ctx, val);
        }
        break;
#endif
    default:
        val = JS_ToNumberFree(ctx, val);
        if (JS_IsException(val)) {
            *pres = 0;
            return -1;
        }
        goto redo;
    }
    *pres = ret;
    return 0;
}

inline int JS_ToInt64(JSContext *ctx, int64_t *pres, JSValueConst val)
{
    return JS_ToInt64Free(ctx, pres, JS_DupValue(ctx, val));
}

inline int JS_ToInt64Ext(JSContext *ctx, int64_t *pres, JSValueConst val)
{
    if (JS_IsBigInt(val))
        return JS_ToBigInt64(ctx, pres, val);
    else
        return JS_ToInt64(ctx, pres, val);
}

/* return (<0, 0) in case of exception */
static int JS_ToInt32Free(JSContext *ctx, int32_t *pres, JSValue val)
{
    uint32_t tag;
    int32_t ret;

 redo:
    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
    case JS_TAG_BOOL:
    case JS_TAG_NULL:
    case JS_TAG_UNDEFINED:
        ret = JS_VALUE_GET_INT(val);
        break;
    case JS_TAG_FLOAT64:
        {
            JSFloat64Union u;
            double d;
            int e;
            d = JS_VALUE_GET_FLOAT64(val);
            u.d = d;
            /* we avoid doing fmod(x, 2^32) */
            e = (u.u64 >> 52) & 0x7ff;
            if (js_likely(e <= (1023 + 30))) {
                /* fast case */
                ret = (int32_t)d;
            } else if (e <= (1023 + 30 + 53)) {
                uint64_t v;
                /* remainder modulo 2^32 */
                v = (u.u64 & (((uint64_t)1 << 52) - 1)) | ((uint64_t)1 << 52);
                v = v << ((e - 1023) - 52 + 32);
                ret = v >> 32;
                /* take the sign into account */
                if (u.u64 >> 63)
                    ret = -ret;
            } else {
                ret = 0; /* also handles NaN and +inf */
            }
        }
        break;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            bf_get_int32(&ret, &p->num, BF_GET_INT_MOD);
            JS_FreeValue(ctx, val);
        }
        break;
#endif
    default:
        val = JS_ToNumberFree(ctx, val);
        if (JS_IsException(val)) {
            *pres = 0;
            return -1;
        }
        goto redo;
    }
    *pres = ret;
    return 0;
}

inline int JS_ToInt32(JSContext *ctx, int32_t *pres, JSValueConst val)
{
    return JS_ToInt32Free(ctx, pres, JS_DupValue(ctx, val));
}

static inline int JS_ToUint32Free(JSContext *ctx, uint32_t *pres, JSValue val)
{
    return JS_ToInt32Free(ctx, (int32_t *)pres, val);
}

static int JS_ToUint8ClampFree(JSContext *ctx, int32_t *pres, JSValue val)
{
    uint32_t tag;
    int res;

 redo:
    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
    case JS_TAG_BOOL:
    case JS_TAG_NULL:
    case JS_TAG_UNDEFINED:
        res = JS_VALUE_GET_INT(val);
#ifdef CONFIG_BIGNUM
    int_clamp:
#endif
        res = max_int(0, min_int(255, res));
        break;
    case JS_TAG_FLOAT64:
        {
            double d = JS_VALUE_GET_FLOAT64(val);
            if (isnan(d)) {
                res = 0;
            } else {
                if (d < 0)
                    res = 0;
                else if (d > 255)
                    res = 255;
                else
                    res = lrint(d);
            }
        }
        break;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            bf_t r_s, *r = &r_s;
            bf_init(ctx->bf_ctx, r);
            bf_set(r, &p->num);
            bf_rint(r, BF_RNDN);
            bf_get_int32(&res, r, 0);
            bf_delete(r);
            JS_FreeValue(ctx, val);
        }
        goto int_clamp;
#endif
    default:
        val = JS_ToNumberFree(ctx, val);
        if (JS_IsException(val)) {
            *pres = 0;
            return -1;
        }
        goto redo;
    }
    *pres = res;
    return 0;
}

[[nodiscard]] static int JS_ToArrayLengthFree(JSContext *ctx, uint32_t *plen,
                                            JSValue val, BOOL is_array_ctor)
{
    uint32_t tag, len;

    tag = JS_VALUE_GET_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
    case JS_TAG_BOOL:
    case JS_TAG_NULL:
        {
            int v;
            v = JS_VALUE_GET_INT(val);
            if (v < 0)
                goto fail;
            len = v;
        }
        break;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            bf_t a;
            BOOL res;
            bf_get_int32((int32_t *)&len, &p->num, BF_GET_INT_MOD);
            bf_init(ctx->bf_ctx, &a);
            bf_set_ui(&a, len);
            res = bf_cmp_eq(&a, &p->num);
            bf_delete(&a);
            JS_FreeValue(ctx, val);
            if (!res)
                goto fail;
        }
        break;
#endif
    default:
        if (JS_TAG_IS_FLOAT64(tag)) {
            double d;
            d = JS_VALUE_GET_FLOAT64(val);
            len = (uint32_t)d;
            if (len != d)
                goto fail;
        } else {
            uint32_t len1;

            if (is_array_ctor) {
                val = JS_ToNumberFree(ctx, val);
                if (JS_IsException(val))
                    return -1;
                /* cannot recurse because val is a number */
                if (JS_ToArrayLengthFree(ctx, &len, val, TRUE))
                    return -1;
            } else {
                /* legacy behavior: must do the conversion twice and compare */
                if (JS_ToUint32(ctx, &len, val)) {
                    JS_FreeValue(ctx, val);
                    return -1;
                }
                val = JS_ToNumberFree(ctx, val);
                if (JS_IsException(val))
                    return -1;
                /* cannot recurse because val is a number */
                if (JS_ToArrayLengthFree(ctx, &len1, val, FALSE))
                    return -1;
                if (len1 != len) {
                fail:
                    JS_ThrowRangeError(ctx, "invalid array length");
                    return -1;
                }
            }
        }
        break;
    }
    *plen = len;
    return 0;
}

#define MAX_SAFE_INTEGER (((int64_t)1 << 53) - 1)

static BOOL is_safe_integer(double d)
{
    return isfinite(d) && floor(d) == d &&
        fabs(d) <= (double)MAX_SAFE_INTEGER;
}

inline int JS_ToIndex(JSContext *ctx, uint64_t *plen, JSValueConst val)
{
    int64_t v;
    if (JS_ToInt64Sat(ctx, &v, val))
        return -1;
    if (v < 0 || v > MAX_SAFE_INTEGER) {
        JS_ThrowRangeError(ctx, "invalid array index");
        *plen = 0;
        return -1;
    }
    *plen = v;
    return 0;
}

/* convert a value to a length between 0 and MAX_SAFE_INTEGER.
   return -1 for exception */
[[nodiscard]] static int JS_ToLengthFree(JSContext *ctx, int64_t *plen,
                                       JSValue val)
{
    int res = JS_ToInt64Clamp(ctx, plen, val, 0, MAX_SAFE_INTEGER, 0);
    JS_FreeValue(ctx, val);
    return res;
}

/* Note: can return an exception */
static int JS_NumberIsInteger(JSContext *ctx, JSValueConst val)
{
    double d;
    if (!JS_IsNumber(val))
        return FALSE;
    if (js_unlikely(JS_ToFloat64(ctx, &d, val)))
        return -1;
    return isfinite(d) && floor(d) == d;
}

static BOOL JS_NumberIsNegativeOrMinusZero(JSContext *ctx, JSValueConst val)
{
    uint32_t tag;

    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
        {
            int v;
            v = JS_VALUE_GET_INT(val);
            return (v < 0);
        }
    case JS_TAG_FLOAT64:
        {
            JSFloat64Union u;
            u.d = JS_VALUE_GET_FLOAT64(val);
            return (u.u64 >> 63);
        }
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            /* Note: integer zeros are not necessarily positive */
            return p->num.sign && !bf_is_zero(&p->num);
        }
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            return p->num.sign;
        }
        break;
    case JS_TAG_BIG_DECIMAL:
        {
            JSBigDecimal *p = JS_VALUE_GET_PTR(val);
            return p->num.sign;
        }
        break;
#endif
    default:
        return FALSE;
    }
}

#ifdef CONFIG_BIGNUM

static JSValue js_bigint_to_string1(JSContext *ctx, JSValueConst val, int radix)
{
    JSValue ret;
    bf_t a_s, *a;
    char *str;
    int saved_sign;

    a = JS_ToBigInt(ctx, &a_s, val);
    if (!a)
        return JS_EXCEPTION;
    saved_sign = a->sign;
    if (a->expn == BF_EXP_ZERO)
        a->sign = 0;
    str = bf_ftoa(NULL, a, radix, 0, BF_RNDZ | BF_FTOA_FORMAT_FRAC |
                  BF_FTOA_JS_QUIRKS);
    a->sign = saved_sign;
    JS_FreeBigInt(ctx, a, &a_s);
    if (!str)
        return JS_ThrowOutOfMemory(ctx);
    ret = JS_NewString(ctx, str);
    bf_free(ctx->bf_ctx, str);
    return ret;
}

static JSValue js_bigint_to_string(JSContext *ctx, JSValueConst val)
{
    return js_bigint_to_string1(ctx, val, 10);
}

static JSValue js_ftoa(JSContext *ctx, JSValueConst val1, int radix,
                       limb_t prec, bf_flags_t flags)
{
    JSValue val, ret;
    bf_t a_s, *a;
    char *str;
    int saved_sign;

    val = JS_ToNumeric(ctx, val1);
    if (JS_IsException(val))
        return val;
    a = JS_ToBigFloat(ctx, &a_s, val);
    saved_sign = a->sign;
    if (a->expn == BF_EXP_ZERO)
        a->sign = 0;
    flags |= BF_FTOA_JS_QUIRKS;
    if ((flags & BF_FTOA_FORMAT_MASK) == BF_FTOA_FORMAT_FREE_MIN) {
        /* Note: for floating point numbers with a radix which is not
           a power of two, the current precision is used to compute
           the number of digits. */
        if ((radix & (radix - 1)) != 0) {
            bf_t r_s, *r = &r_s;
            int prec, flags1;
            /* must round first */
            if (JS_VALUE_GET_TAG(val) == JS_TAG_BIG_FLOAT) {
                prec = ctx->fp_env.prec;
                flags1 = ctx->fp_env.flags &
                    (BF_FLAG_SUBNORMAL | (BF_EXP_BITS_MASK << BF_EXP_BITS_SHIFT));
            } else {
                prec = 53;
                flags1 = bf_set_exp_bits(11) | BF_FLAG_SUBNORMAL;
            }
            bf_init(ctx->bf_ctx, r);
            bf_set(r, a);
            bf_round(r, prec, flags1 | BF_RNDN);
            str = bf_ftoa(NULL, r, radix, prec, flags1 | flags);
            bf_delete(r);
        } else {
            str = bf_ftoa(NULL, a, radix, BF_PREC_INF, flags);
        }
    } else {
        str = bf_ftoa(NULL, a, radix, prec, flags);
    }
    a->sign = saved_sign;
    if (a == &a_s)
        bf_delete(a);
    JS_FreeValue(ctx, val);
    if (!str)
        return JS_ThrowOutOfMemory(ctx);
    ret = JS_NewString(ctx, str);
    bf_free(ctx->bf_ctx, str);
    return ret;
}

static JSValue js_bigfloat_to_string(JSContext *ctx, JSValueConst val)
{
    return js_ftoa(ctx, val, 10, 0, BF_RNDN | BF_FTOA_FORMAT_FREE_MIN);
}

static JSValue js_bigdecimal_to_string1(JSContext *ctx, JSValueConst val,
                                        limb_t prec, int flags)
{
    JSValue ret;
    bfdec_t *a;
    char *str;
    int saved_sign;

    a = JS_ToBigDecimal(ctx, val);
    saved_sign = a->sign;
    if (a->expn == BF_EXP_ZERO)
        a->sign = 0;
    str = bfdec_ftoa(NULL, a, prec, flags | BF_FTOA_JS_QUIRKS);
    a->sign = saved_sign;
    if (!str)
        return JS_ThrowOutOfMemory(ctx);
    ret = JS_NewString(ctx, str);
    bf_free(ctx->bf_ctx, str);
    return ret;
}

static JSValue js_bigdecimal_to_string(JSContext *ctx, JSValueConst val)
{
    return js_bigdecimal_to_string1(ctx, val, 0,
                                    BF_RNDZ | BF_FTOA_FORMAT_FREE);
}

#endif /* CONFIG_BIGNUM */

/* 2 <= base <= 36 */
static char *i64toa(char *buf_end, int64_t n, unsigned int base)
{
    char *q = buf_end;
    int digit, is_neg;

    is_neg = 0;
    if (n < 0) {
        is_neg = 1;
        n = -n;
    }
    *--q = '\0';
    do {
        digit = (uint64_t)n % base;
        n = (uint64_t)n / base;
        if (digit < 10)
            digit += '0';
        else
            digit += 'a' - 10;
        *--q = digit;
    } while (n != 0);
    if (is_neg)
        *--q = '-';
    return q;
}

/* buf1 contains the printf result */
static void js_ecvt1(double d, int n_digits, int *decpt, int *sign, char *buf,
                     int rounding_mode, char *buf1, int buf1_size)
{
    if (rounding_mode != FE_TONEAREST)
        fesetround(rounding_mode);
    snprintf(buf1, buf1_size, "%+.*e", n_digits - 1, d);
    if (rounding_mode != FE_TONEAREST)
        fesetround(FE_TONEAREST);
    *sign = (buf1[0] == '-');
    /* mantissa */
    buf[0] = buf1[1];
    if (n_digits > 1)
        memcpy(buf + 1, buf1 + 3, n_digits - 1);
    buf[n_digits] = '\0';
    /* exponent */
    *decpt = atoi(buf1 + n_digits + 2 + (n_digits > 1)) + 1;
}

/* maximum buffer size for js_dtoa */
#define JS_DTOA_BUF_SIZE 128

/* needed because ecvt usually limits the number of digits to
   17. Return the number of digits. */
static int js_ecvt(double d, int n_digits, int *decpt, int *sign, char *buf,
                   BOOL is_fixed)
{
    int rounding_mode;
    char buf_tmp[JS_DTOA_BUF_SIZE];

    if (!is_fixed) {
        unsigned int n_digits_min, n_digits_max;
        /* find the minimum amount of digits (XXX: inefficient but simple) */
        n_digits_min = 1;
        n_digits_max = 17;
        while (n_digits_min < n_digits_max) {
            n_digits = (n_digits_min + n_digits_max) / 2;
            js_ecvt1(d, n_digits, decpt, sign, buf, FE_TONEAREST,
                     buf_tmp, sizeof(buf_tmp));
            if (strtod(buf_tmp, NULL) == d) {
                /* no need to keep the trailing zeros */
                while (n_digits >= 2 && buf[n_digits - 1] == '0')
                    n_digits--;
                n_digits_max = n_digits;
            } else {
                n_digits_min = n_digits + 1;
            }
        }
        n_digits = n_digits_max;
        rounding_mode = FE_TONEAREST;
    } else {
        rounding_mode = FE_TONEAREST;
#ifdef CONFIG_PRINTF_RNDN
        {
            char buf1[JS_DTOA_BUF_SIZE], buf2[JS_DTOA_BUF_SIZE];
            int decpt1, sign1, decpt2, sign2;
            /* The JS rounding is specified as round to nearest ties away
               from zero (RNDNA), but in printf the "ties" case is not
               specified (for example it is RNDN for glibc, RNDNA for
               Windows), so we must round manually. */
            js_ecvt1(d, n_digits + 1, &decpt1, &sign1, buf1, FE_TONEAREST,
                     buf_tmp, sizeof(buf_tmp));
            /* XXX: could use 2 digits to reduce the average running time */
            if (buf1[n_digits] == '5') {
                js_ecvt1(d, n_digits + 1, &decpt1, &sign1, buf1, FE_DOWNWARD,
                         buf_tmp, sizeof(buf_tmp));
                js_ecvt1(d, n_digits + 1, &decpt2, &sign2, buf2, FE_UPWARD,
                         buf_tmp, sizeof(buf_tmp));
                if (memcmp(buf1, buf2, n_digits + 1) == 0 && decpt1 == decpt2) {
                    /* exact result: round away from zero */
                    if (sign1)
                        rounding_mode = FE_DOWNWARD;
                    else
                        rounding_mode = FE_UPWARD;
                }
            }
        }
#endif /* CONFIG_PRINTF_RNDN */
    }
    js_ecvt1(d, n_digits, decpt, sign, buf, rounding_mode,
             buf_tmp, sizeof(buf_tmp));
    return n_digits;
}

static int js_fcvt1(char *buf, int buf_size, double d, int n_digits,
                    int rounding_mode)
{
    int n;
    if (rounding_mode != FE_TONEAREST)
        fesetround(rounding_mode);
    n = snprintf(buf, buf_size, "%.*f", n_digits, d);
    if (rounding_mode != FE_TONEAREST)
        fesetround(FE_TONEAREST);
    assert(n < buf_size);
    return n;
}

static void js_fcvt(char *buf, int buf_size, double d, int n_digits)
{
    int rounding_mode;
    rounding_mode = FE_TONEAREST;
#ifdef CONFIG_PRINTF_RNDN
    {
        int n1, n2;
        char buf1[JS_DTOA_BUF_SIZE];
        char buf2[JS_DTOA_BUF_SIZE];

        /* The JS rounding is specified as round to nearest ties away from
           zero (RNDNA), but in printf the "ties" case is not specified
           (for example it is RNDN for glibc, RNDNA for Windows), so we
           must round manually. */
        n1 = js_fcvt1(buf1, sizeof(buf1), d, n_digits + 1, FE_TONEAREST);
        rounding_mode = FE_TONEAREST;
        /* XXX: could use 2 digits to reduce the average running time */
        if (buf1[n1 - 1] == '5') {
            n1 = js_fcvt1(buf1, sizeof(buf1), d, n_digits + 1, FE_DOWNWARD);
            n2 = js_fcvt1(buf2, sizeof(buf2), d, n_digits + 1, FE_UPWARD);
            if (n1 == n2 && memcmp(buf1, buf2, n1) == 0) {
                /* exact result: round away from zero */
                if (buf1[0] == '-')
                    rounding_mode = FE_DOWNWARD;
                else
                    rounding_mode = FE_UPWARD;
            }
        }
    }
#endif /* CONFIG_PRINTF_RNDN */
    js_fcvt1(buf, buf_size, d, n_digits, rounding_mode);
}

/* radix != 10 is only supported with flags = JS_DTOA_VAR_FORMAT */
/* use as many digits as necessary */
#define JS_DTOA_VAR_FORMAT   (0 << 0)
/* use n_digits significant digits (1 <= n_digits <= 101) */
#define JS_DTOA_FIXED_FORMAT (1 << 0)
/* force fractional format: [-]dd.dd with n_digits fractional digits */
#define JS_DTOA_FRAC_FORMAT  (2 << 0)
/* force exponential notation either in fixed or variable format */
#define JS_DTOA_FORCE_EXP    (1 << 2)

/* XXX: slow and maybe not fully correct. Use libbf when it is fast enough.
   XXX: radix != 10 is only supported for small integers
*/
static void js_dtoa1(char *buf, double d, int radix, int n_digits, int flags)
{
    char *q;

    if (!isfinite(d)) {
        if (isnan(d)) {
            strcpy(buf, "NaN");
        } else {
            q = buf;
            if (d < 0)
                *q++ = '-';
            strcpy(q, "Infinity");
        }
    } else if (flags == JS_DTOA_VAR_FORMAT) {
        int64_t i64;
        char buf1[70], *ptr;
        i64 = (int64_t)d;
        if (d != i64 || i64 > MAX_SAFE_INTEGER || i64 < -MAX_SAFE_INTEGER)
            goto generic_conv;
        /* fast path for integers */
        ptr = i64toa(buf1 + sizeof(buf1), i64, radix);
        strcpy(buf, ptr);
    } else {
        if (d == 0.0)
            d = 0.0; /* convert -0 to 0 */
        if (flags == JS_DTOA_FRAC_FORMAT) {
            js_fcvt(buf, JS_DTOA_BUF_SIZE, d, n_digits);
        } else {
            char buf1[JS_DTOA_BUF_SIZE];
            int sign, decpt, k, n, i, p, n_max;
            BOOL is_fixed;
        generic_conv:
            is_fixed = ((flags & 3) == JS_DTOA_FIXED_FORMAT);
            if (is_fixed) {
                n_max = n_digits;
            } else {
                n_max = 21;
            }
            /* the number has k digits (k >= 1) */
            k = js_ecvt(d, n_digits, &decpt, &sign, buf1, is_fixed);
            n = decpt; /* d=10^(n-k)*(buf1) i.e. d= < x.yyyy 10^(n-1) */
            q = buf;
            if (sign)
                *q++ = '-';
            if (flags & JS_DTOA_FORCE_EXP)
                goto force_exp;
            if (n >= 1 && n <= n_max) {
                if (k <= n) {
                    memcpy(q, buf1, k);
                    q += k;
                    for(i = 0; i < (n - k); i++)
                        *q++ = '0';
                    *q = '\0';
                } else {
                    /* k > n */
                    memcpy(q, buf1, n);
                    q += n;
                    *q++ = '.';
                    for(i = 0; i < (k - n); i++)
                        *q++ = buf1[n + i];
                    *q = '\0';
                }
            } else if (n >= -5 && n <= 0) {
                *q++ = '0';
                *q++ = '.';
                for(i = 0; i < -n; i++)
                    *q++ = '0';
                memcpy(q, buf1, k);
                q += k;
                *q = '\0';
            } else {
            force_exp:
                /* exponential notation */
                *q++ = buf1[0];
                if (k > 1) {
                    *q++ = '.';
                    for(i = 1; i < k; i++)
                        *q++ = buf1[i];
                }
                *q++ = 'e';
                p = n - 1;
                if (p >= 0)
                    *q++ = '+';
                sprintf(q, "%d", p);
            }
        }
    }
}

static JSValue js_dtoa(JSContext *ctx,
                       double d, int radix, int n_digits, int flags)
{
    char buf[JS_DTOA_BUF_SIZE];
    js_dtoa1(buf, d, radix, n_digits, flags);
    return JS_NewString(ctx, buf);
}

inline JSValue JS_ToStringInternal(JSContext *ctx, JSValueConst val, BOOL is_ToPropertyKey)
{
    uint32_t tag;
    const char *str;
    char buf[32];

    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_STRING:
        return JS_DupValue(ctx, val);
    case JS_TAG_INT:
        snprintf(buf, sizeof(buf), "%d", JS_VALUE_GET_INT(val));
        str = buf;
        goto new_string;
    case JS_TAG_BOOL:
        return JS_AtomToString(ctx, JS_VALUE_GET_BOOL(val) ?
                          JS_ATOM_true : JS_ATOM_false);
    case JS_TAG_NULL:
        return JS_AtomToString(ctx, JS_ATOM_null);
    case JS_TAG_UNDEFINED:
        return JS_AtomToString(ctx, JS_ATOM_undefined);
    case JS_TAG_EXCEPTION:
        return JS_EXCEPTION;
    case JS_TAG_OBJECT:
        {
            JSValue val1, ret;
            val1 = JS_ToPrimitive(ctx, val, HINT_STRING);
            if (JS_IsException(val1))
                return val1;
            ret = JS_ToStringInternal(ctx, val1, is_ToPropertyKey);
            JS_FreeValue(ctx, val1);
            return ret;
        }
        break;
    case JS_TAG_FUNCTION_BYTECODE:
        str = "[function bytecode]";
        goto new_string;
    case JS_TAG_SYMBOL:
        if (is_ToPropertyKey) {
            return JS_DupValue(ctx, val);
        } else {
            return JS_ThrowTypeError(ctx, "cannot convert symbol to string");
        }
    case JS_TAG_FLOAT64:
        return js_dtoa(ctx, JS_VALUE_GET_FLOAT64(val), 10, 0,
                       JS_DTOA_VAR_FORMAT);
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
        return ctx->rt->bigint_ops.to_string(ctx, val);
    case JS_TAG_BIG_FLOAT:
        return ctx->rt->bigfloat_ops.to_string(ctx, val);
    case JS_TAG_BIG_DECIMAL:
        return ctx->rt->bigdecimal_ops.to_string(ctx, val);
#endif
    default:
        str = "[unsupported type]";
    new_string:
        return JS_NewString(ctx, str);
    }
}

inline JSValue JS_ToString(JSContext *ctx, JSValueConst val)
{
    return JS_ToStringInternal(ctx, val, FALSE);
}

static JSValue JS_ToStringFree(JSContext *ctx, JSValue val)
{
    JSValue ret;
    ret = JS_ToString(ctx, val);
    JS_FreeValue(ctx, val);
    return ret;
}

static JSValue JS_ToLocaleStringFree(JSContext *ctx, JSValue val)
{
    if (JS_IsUndefined(val) || JS_IsNull(val))
        return JS_ToStringFree(ctx, val);
    return JS_InvokeFree(ctx, val, JS_ATOM_toLocaleString, 0, NULL);
}

inline JSValue JS_ToPropertyKey(JSContext *ctx, JSValueConst val)
{
    return JS_ToStringInternal(ctx, val, TRUE);
}

static JSValue JS_ToStringCheckObject(JSContext *ctx, JSValueConst val)
{
    uint32_t tag = JS_VALUE_GET_TAG(val);
    if (tag == JS_TAG_NULL || tag == JS_TAG_UNDEFINED)
        return JS_ThrowTypeError(ctx, "null or undefined are forbidden");
    return JS_ToString(ctx, val);
}

static JSValue JS_ToQuotedString(JSContext *ctx, JSValueConst val1)
{
    JSValue val;
    JSString *p;
    int i;
    uint32_t c;
    StringBuffer b_s, *b = &b_s;
    char buf[16];

    val = JS_ToStringCheckObject(ctx, val1);
    if (JS_IsException(val))
        return val;
    p = JS_VALUE_GET_STRING(val);

    if (string_buffer_init(ctx, b, p->len + 2))
        goto fail;

    if (string_buffer_putc8(b, '\"'))
        goto fail;
    for(i = 0; i < p->len; ) {
        c = string_getc(p, &i);
        switch(c) {
        case '\t':
            c = 't';
            goto quote;
        case '\r':
            c = 'r';
            goto quote;
        case '\n':
            c = 'n';
            goto quote;
        case '\b':
            c = 'b';
            goto quote;
        case '\f':
            c = 'f';
            goto quote;
        case '\"':
        case '\\':
        quote:
            if (string_buffer_putc8(b, '\\'))
                goto fail;
            if (string_buffer_putc8(b, c))
                goto fail;
            break;
        default:
            if (c < 32 || (c >= 0xd800 && c < 0xe000)) {
                snprintf(buf, sizeof(buf), "\\u%04x", c);
                if (string_buffer_puts8(b, buf))
                    goto fail;
            } else {
                if (string_buffer_putc(b, c))
                    goto fail;
            }
            break;
        }
    }
    if (string_buffer_putc8(b, '\"'))
        goto fail;
    JS_FreeValue(ctx, val);
    return string_buffer_end(b);
 fail:
    JS_FreeValue(ctx, val);
    string_buffer_free(b);
    return JS_EXCEPTION;
}

inline void JS_DumpObjectHeader(JSRuntime *rt)
{
    printf("%14s %4s %4s %14s %10s %s\n",
           "ADDRESS", "REFS", "SHRF", "PROTO", "CLASS", "PROPS");
}

/* for debug only: dump an object without side effect */
inline void JS_DumpObject(JSRuntime *rt, JSObject *p)
{
    uint32_t i;
    char atom_buf[ATOM_GET_STR_BUF_SIZE];
    JSShape *sh;
    JSShapeProperty *prs;
    JSProperty *pr;
    BOOL is_first = TRUE;

    /* XXX: should encode atoms with special characters */
    sh = p->shape; /* the shape can be NULL while freeing an object */
    printf("%14p %4d ",
           (void *)p,
           p->header.ref_count);
    if (sh) {
        printf("%3d%c %14p ",
               sh->header.ref_count,
               " *"[sh->is_hashed],
               (void *)sh->proto);
    } else {
        printf("%3s  %14s ", "-", "-");
    }
    printf("%10s ",
           JS_AtomGetStrRT(rt, atom_buf, sizeof(atom_buf), rt->class_array[p->class_id].class_name));
    if (p->is_exotic && p->fast_array) {
        printf("[ ");
        for(i = 0; i < p->u.array.count; i++) {
            if (i != 0)
                printf(", ");
            switch (p->class_id) {
            case JS_CLASS_ARRAY:
            case JS_CLASS_ARGUMENTS:
                JS_DumpValueShort(rt, p->u.array.u.values[i]);
                break;
            case JS_CLASS_UINT8C_ARRAY:
            case JS_CLASS_INT8_ARRAY:
            case JS_CLASS_UINT8_ARRAY:
            case JS_CLASS_INT16_ARRAY:
            case JS_CLASS_UINT16_ARRAY:
            case JS_CLASS_INT32_ARRAY:
            case JS_CLASS_UINT32_ARRAY:
#ifdef CONFIG_BIGNUM
            case JS_CLASS_BIG_INT64_ARRAY:
            case JS_CLASS_BIG_UINT64_ARRAY:
#endif
            case JS_CLASS_FLOAT32_ARRAY:
            case JS_CLASS_FLOAT64_ARRAY:
                {
                    int size = 1 << typed_array_size_log2(p->class_id);
                    const uint8_t *b = p->u.array.u.uint8_ptr + i * size;
                    while (size-- > 0)
                        printf("%02X", *b++);
                }
                break;
            }
        }
        printf(" ] ");
    }

    if (sh) {
        printf("{ ");
        for(i = 0, prs = get_shape_prop(sh); i < sh->prop_count; i++, prs++) {
            if (prs->atom != JS_ATOM_NULL) {
                pr = &p->prop[i];
                if (!is_first)
                    printf(", ");
                printf("%s: ",
                       JS_AtomGetStrRT(rt, atom_buf, sizeof(atom_buf), prs->atom));
                if ((prs->flags & JS_PROP_TMASK) == JS_PROP_GETSET) {
                    printf("[getset %p %p]", (void *)pr->u.getset.getter,
                           (void *)pr->u.getset.setter);
                } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_VARREF) {
                    printf("[varref %p]", (void *)pr->u.var_ref);
                } else if ((prs->flags & JS_PROP_TMASK) == JS_PROP_AUTOINIT) {
                    printf("[autoinit %p %d %p]",
                           (void *)js_autoinit_get_realm(pr),
                           js_autoinit_get_id(pr),
                           (void *)pr->u.init.opaque);
                } else {
                    JS_DumpValueShort(rt, pr->u.value);
                }
                is_first = FALSE;
            }
        }
        printf(" }");
    }

    if (js_class_has_bytecode(p->class_id)) {
        JSFunctionBytecode *b = p->u.func.function_bytecode;
        JSVarRef **var_refs;
        if (b->closure_var_count) {
            var_refs = p->u.func.var_refs;
            printf(" Closure:");
            for(i = 0; i < b->closure_var_count; i++) {
                printf(" ");
                JS_DumpValueShort(rt, var_refs[i]->value);
            }
            if (p->u.func.home_object) {
                printf(" HomeObject: ");
                JS_DumpValueShort(rt, JS_MKPTR(JS_TAG_OBJECT, p->u.func.home_object));
            }
        }
    }
    printf("\n");
}

inline void JS_DumpGCObject(JSRuntime *rt, JSGCObjectHeader *p)
{
    if (p->gc_obj_type == JS_GC_OBJ_TYPE_JS_OBJECT) {
        JS_DumpObject(rt, (JSObject *)p);
    } else {
        printf("%14p %4d ",
               (void *)p,
               p->ref_count);
        switch(p->gc_obj_type) {
        case JS_GC_OBJ_TYPE_FUNCTION_BYTECODE:
            printf("[function bytecode]");
            break;
        case JS_GC_OBJ_TYPE_SHAPE:
            printf("[shape]");
            break;
        case JS_GC_OBJ_TYPE_VAR_REF:
            printf("[var_ref]");
            break;
        case JS_GC_OBJ_TYPE_ASYNC_FUNCTION:
            printf("[async_function]");
            break;
        case JS_GC_OBJ_TYPE_JS_CONTEXT:
            printf("[js_context]");
            break;
        default:
            printf("[unknown %d]", p->gc_obj_type);
            break;
        }
        printf("\n");
    }
}

inline void JS_DumpValueShort(JSRuntime *rt, JSValueConst val)
{
    uint32_t tag = JS_VALUE_GET_NORM_TAG(val);
    const char *str;

    switch(tag) {
    case JS_TAG_INT:
        printf("%d", JS_VALUE_GET_INT(val));
        break;
    case JS_TAG_BOOL:
        if (JS_VALUE_GET_BOOL(val))
            str = "true";
        else
            str = "false";
        goto print_str;
    case JS_TAG_NULL:
        str = "null";
        goto print_str;
    case JS_TAG_EXCEPTION:
        str = "exception";
        goto print_str;
    case JS_TAG_UNINITIALIZED:
        str = "uninitialized";
        goto print_str;
    case JS_TAG_UNDEFINED:
        str = "undefined";
    print_str:
        printf("%s", str);
        break;
    case JS_TAG_FLOAT64:
        printf("%.14g", JS_VALUE_GET_FLOAT64(val));
        break;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            char *str;
            str = bf_ftoa(NULL, &p->num, 10, 0,
                          BF_RNDZ | BF_FTOA_FORMAT_FRAC);
            printf("%sn", str);
            bf_realloc(&rt->bf_ctx, str, 0);
        }
        break;
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            char *str;
            str = bf_ftoa(NULL, &p->num, 16, BF_PREC_INF,
                          BF_RNDZ | BF_FTOA_FORMAT_FREE | BF_FTOA_ADD_PREFIX);
            printf("%sl", str);
            bf_free(&rt->bf_ctx, str);
        }
        break;
    case JS_TAG_BIG_DECIMAL:
        {
            JSBigDecimal *p = JS_VALUE_GET_PTR(val);
            char *str;
            str = bfdec_ftoa(NULL, &p->num, BF_PREC_INF,
                             BF_RNDZ | BF_FTOA_FORMAT_FREE);
            printf("%sm", str);
            bf_free(&rt->bf_ctx, str);
        }
        break;
#endif
    case JS_TAG_STRING:
        {
            JSString *p;
            p = JS_VALUE_GET_STRING(val);
            JS_DumpString(rt, p);
        }
        break;
    case JS_TAG_FUNCTION_BYTECODE:
        {
            auto b = (JSFunctionBytecode*) JS_VALUE_GET_PTR(val);
            char buf[ATOM_GET_STR_BUF_SIZE];
            printf("[bytecode %s]", JS_AtomGetStrRT(rt, buf, sizeof(buf), b->func_name));
        }
        break;
    case JS_TAG_OBJECT:
        {
            JSObject *p = JS_VALUE_GET_OBJ(val);
            JSAtom atom = rt->class_array[p->class_id].class_name;
            char atom_buf[ATOM_GET_STR_BUF_SIZE];
            printf("[%s %p]",
                   JS_AtomGetStrRT(rt, atom_buf, sizeof(atom_buf), atom), (void *)p);
        }
        break;
    case JS_TAG_SYMBOL:
        {
            auto p = (JSAtomStruct*) JS_VALUE_GET_PTR(val);
            char atom_buf[ATOM_GET_STR_BUF_SIZE];
            printf("Symbol(%s)",
                   JS_AtomGetStrRT(rt, atom_buf, sizeof(atom_buf), js_get_atom_index(rt, p)));
        }
        break;
    case JS_TAG_MODULE:
        printf("[module]");
        break;
    default:
        printf("[unknown tag %d]", tag);
        break;
    }
}

inline void JS_DumpValue(JSContext *ctx, JSValueConst val)
{
    JS_DumpValueShort(ctx->rt, val);
}

inline void JS_PrintValue(JSContext *ctx, const char *str, JSValueConst val)
{
    printf("%s=", str);
    JS_DumpValueShort(ctx->rt, val);
    printf("\n");
}

/* return -1 if exception (proxy case) or TRUE/FALSE */
inline int JS_IsArray(JSContext *ctx, JSValueConst val)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(val) == JS_TAG_OBJECT) {
        p = JS_VALUE_GET_OBJ(val);
        if (js_unlikely(p->class_id == JS_CLASS_PROXY))
            return js_proxy_isArray(ctx, val);
        else
            return p->class_id == JS_CLASS_ARRAY;
    } else {
        return FALSE;
    }
}

static double js_pow(double a, double b)
{
    if (js_unlikely(!isfinite(b)) && fabs(a) == 1) {
        /* not compatible with IEEE 754 */
        return JS_FLOAT64_NAN;
    } else {
        return pow(a, b);
    }
}

#ifdef CONFIG_BIGNUM

inline JSValue JS_NewBigInt64_1(JSContext *ctx, int64_t v)
{
    JSValue val;
    bf_t *a;
    val = JS_NewBigInt(ctx);
    if (JS_IsException(val))
        return val;
    a = JS_GetBigInt(val);
    if (bf_set_si(a, v)) {
        JS_FreeValue(ctx, val);
        return JS_ThrowOutOfMemory(ctx);
    }
    return val;
}

inline JSValue JS_NewBigInt64(JSContext *ctx, int64_t v)
{
    if (is_math_mode(ctx) &&
        v >= -MAX_SAFE_INTEGER && v <= MAX_SAFE_INTEGER) {
        return JS_NewInt64(ctx, v);
    } else {
        return JS_NewBigInt64_1(ctx, v);
    }
}

inline JSValue JS_NewBigUint64(JSContext *ctx, uint64_t v)
{
    JSValue val;
    if (is_math_mode(ctx) && v <= MAX_SAFE_INTEGER) {
        val = JS_NewInt64(ctx, v);
    } else {
        bf_t *a;
        val = JS_NewBigInt(ctx);
        if (JS_IsException(val))
            return val;
        a = JS_GetBigInt(val);
        if (bf_set_ui(a, v)) {
            JS_FreeValue(ctx, val);
            return JS_ThrowOutOfMemory(ctx);
        }
    }
    return val;
}

/* if the returned bigfloat is allocated it is equal to
   'buf'. Otherwise it is a pointer to the bigfloat in 'val'. Return
   NULL in case of error. */
static bf_t *JS_ToBigFloat(JSContext *ctx, bf_t *buf, JSValueConst val)
{
    uint32_t tag;
    bf_t *r;
    JSBigFloat *p;

    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
    case JS_TAG_BOOL:
    case JS_TAG_NULL:
        r = buf;
        bf_init(ctx->bf_ctx, r);
        if (bf_set_si(r, JS_VALUE_GET_INT(val)))
            goto fail;
        break;
    case JS_TAG_FLOAT64:
        r = buf;
        bf_init(ctx->bf_ctx, r);
        if (bf_set_float64(r, JS_VALUE_GET_FLOAT64(val))) {
        fail:
            bf_delete(r);
            return NULL;
        }
        break;
    case JS_TAG_BIG_INT:
    case JS_TAG_BIG_FLOAT:
        p = JS_VALUE_GET_PTR(val);
        r = &p->num;
        break;
    case JS_TAG_UNDEFINED:
    default:
        r = buf;
        bf_init(ctx->bf_ctx, r);
        bf_set_nan(r);
        break;
    }
    return r;
}

/* return NULL if invalid type */
static bfdec_t *JS_ToBigDecimal(JSContext *ctx, JSValueConst val)
{
    uint32_t tag;
    JSBigDecimal *p;
    bfdec_t *r;

    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_BIG_DECIMAL:
        p = JS_VALUE_GET_PTR(val);
        r = &p->num;
        break;
    default:
        JS_ThrowTypeError(ctx, "bigdecimal expected");
        r = NULL;
        break;
    }
    return r;
}

/* return NaN if bad bigint literal */
static JSValue JS_StringToBigInt(JSContext *ctx, JSValue val)
{
    const char *str, *p;
    size_t len;
    int flags;

    str = JS_ToCStringLen(ctx, &len, val);
    JS_FreeValue(ctx, val);
    if (!str)
        return JS_EXCEPTION;
    p = str;
    p += skip_spaces(p);
    if ((p - str) == len) {
        val = JS_NewBigInt64(ctx, 0);
    } else {
        flags = ATOD_INT_ONLY | ATOD_ACCEPT_BIN_OCT | ATOD_TYPE_BIG_INT;
        if (is_math_mode(ctx))
            flags |= ATOD_MODE_BIGINT;
        val = js_atof(ctx, p, &p, 0, flags);
        p += skip_spaces(p);
        if (!JS_IsException(val)) {
            if ((p - str) != len) {
                JS_FreeValue(ctx, val);
                val = JS_NAN;
            }
        }
    }
    JS_FreeCString(ctx, str);
    return val;
}

static JSValue JS_StringToBigIntErr(JSContext *ctx, JSValue val)
{
    val = JS_StringToBigInt(ctx, val);
    if (JS_VALUE_IS_NAN(val))
        return JS_ThrowSyntaxError(ctx, "invalid bigint literal");
    return val;
}

/* if the returned bigfloat is allocated it is equal to
   'buf'. Otherwise it is a pointer to the bigfloat in 'val'. */
static bf_t *JS_ToBigIntFree(JSContext *ctx, bf_t *buf, JSValue val)
{
    uint32_t tag;
    bf_t *r;
    JSBigFloat *p;

 redo:
    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
    case JS_TAG_NULL:
    case JS_TAG_UNDEFINED:
        if (!is_math_mode(ctx))
            goto fail;
        /* fall tru */
    case JS_TAG_BOOL:
        r = buf;
        bf_init(ctx->bf_ctx, r);
        bf_set_si(r, JS_VALUE_GET_INT(val));
        break;
    case JS_TAG_FLOAT64:
        {
            double d = JS_VALUE_GET_FLOAT64(val);
            if (!is_math_mode(ctx))
                goto fail;
            if (!isfinite(d))
                goto fail;
            r = buf;
            bf_init(ctx->bf_ctx, r);
            d = trunc(d);
            bf_set_float64(r, d);
        }
        break;
    case JS_TAG_BIG_INT:
        p = JS_VALUE_GET_PTR(val);
        r = &p->num;
        break;
    case JS_TAG_BIG_FLOAT:
        if (!is_math_mode(ctx))
            goto fail;
        p = JS_VALUE_GET_PTR(val);
        if (!bf_is_finite(&p->num))
            goto fail;
        r = buf;
        bf_init(ctx->bf_ctx, r);
        bf_set(r, &p->num);
        bf_rint(r, BF_RNDZ);
        JS_FreeValue(ctx, val);
        break;
    case JS_TAG_STRING:
        val = JS_StringToBigIntErr(ctx, val);
        if (JS_IsException(val))
            return NULL;
        goto redo;
    case JS_TAG_OBJECT:
        val = JS_ToPrimitiveFree(ctx, val, HINT_NUMBER);
        if (JS_IsException(val))
            return NULL;
        goto redo;
    default:
    fail:
        JS_FreeValue(ctx, val);
        JS_ThrowTypeError(ctx, "cannot convert to bigint");
        return NULL;
    }
    return r;
}

static bf_t *JS_ToBigInt(JSContext *ctx, bf_t *buf, JSValueConst val)
{
    return JS_ToBigIntFree(ctx, buf, JS_DupValue(ctx, val));
}

static JSValue JS_ToBigIntValueFree(JSContext *ctx, JSValue val)
{
    if (JS_VALUE_GET_TAG(val) == JS_TAG_BIG_INT) {
        return val;
    } else {
        bf_t a_s, *a, *r;
        int ret;
        JSValue res;

        res = JS_NewBigInt(ctx);
        if (JS_IsException(res))
            return JS_EXCEPTION;
        a = JS_ToBigIntFree(ctx, &a_s, val);
        if (!a) {
            JS_FreeValue(ctx, res);
            return JS_EXCEPTION;
        }
        r = JS_GetBigInt(res);
        ret = bf_set(r, a);
        JS_FreeBigInt(ctx, a, &a_s);
        if (ret) {
            JS_FreeValue(ctx, res);
            return JS_ThrowOutOfMemory(ctx);
        }
        return JS_CompactBigInt(ctx, res);
    }
}

/* free the bf_t allocated by JS_ToBigInt */
static void JS_FreeBigInt(JSContext *ctx, bf_t *a, bf_t *buf)
{
    if (a == buf) {
        bf_delete(a);
    } else {
        JSBigFloat *p = (JSBigFloat *)((uint8_t *)a -
                                       offsetof(JSBigFloat, num));
        JS_FreeValue(ctx, JS_MKPTR(JS_TAG_BIG_FLOAT, p));
    }
}

/* XXX: merge with JS_ToInt64Free with a specific flag */
static int JS_ToBigInt64Free(JSContext *ctx, int64_t *pres, JSValue val)
{
    bf_t a_s, *a;

    a = JS_ToBigIntFree(ctx, &a_s, val);
    if (!a) {
        *pres = 0;
        return -1;
    }
    bf_get_int64(pres, a, BF_GET_INT_MOD);
    JS_FreeBigInt(ctx, a, &a_s);
    return 0;
}

inline int JS_ToBigInt64(JSContext *ctx, int64_t *pres, JSValueConst val)
{
    return JS_ToBigInt64Free(ctx, pres, JS_DupValue(ctx, val));
}

static JSBigFloat *js_new_bf(JSContext *ctx)
{
    JSBigFloat *p;
    p = js_malloc(ctx, sizeof(*p));
    if (!p)
        return NULL;
    p->header.ref_count = 1;
    bf_init(ctx->bf_ctx, &p->num);
    return p;
}

static JSValue JS_NewBigFloat(JSContext *ctx)
{
    JSBigFloat *p;
    p = js_malloc(ctx, sizeof(*p));
    if (!p)
        return JS_EXCEPTION;
    p->header.ref_count = 1;
    bf_init(ctx->bf_ctx, &p->num);
    return JS_MKPTR(JS_TAG_BIG_FLOAT, p);
}

static JSValue JS_NewBigDecimal(JSContext *ctx)
{
    JSBigDecimal *p;
    p = js_malloc(ctx, sizeof(*p));
    if (!p)
        return JS_EXCEPTION;
    p->header.ref_count = 1;
    bfdec_init(ctx->bf_ctx, &p->num);
    return JS_MKPTR(JS_TAG_BIG_DECIMAL, p);
}

static JSValue JS_NewBigInt(JSContext *ctx)
{
    JSBigFloat *p;
    p = js_malloc(ctx, sizeof(*p));
    if (!p)
        return JS_EXCEPTION;
    p->header.ref_count = 1;
    bf_init(ctx->bf_ctx, &p->num);
    return JS_MKPTR(JS_TAG_BIG_INT, p);
}

static JSValue JS_CompactBigInt1(JSContext *ctx, JSValue val,
                                 BOOL convert_to_safe_integer)
{
    int64_t v;
    bf_t *a;

    if (JS_VALUE_GET_TAG(val) != JS_TAG_BIG_INT)
        return val; /* fail safe */
    a = JS_GetBigInt(val);
    if (convert_to_safe_integer && bf_get_int64(&v, a, 0) == 0 &&
        v >= -MAX_SAFE_INTEGER && v <= MAX_SAFE_INTEGER) {
        JS_FreeValue(ctx, val);
        return JS_NewInt64(ctx, v);
    } else if (a->expn == BF_EXP_ZERO && a->sign) {
        JSBigFloat *p = JS_VALUE_GET_PTR(val);
        assert(p->header.ref_count == 1);
        a->sign = 0;
    }
    return val;
}

/* Convert the big int to a safe integer if in math mode. normalize
   the zero representation. Could also be used to convert the bigint
   to a short bigint value. The reference count of the value must be
   1. Cannot fail */
static JSValue JS_CompactBigInt(JSContext *ctx, JSValue val)
{
    return JS_CompactBigInt1(ctx, val, is_math_mode(ctx));
}

/* must be kept in sync with JSOverloadableOperatorEnum */
/* XXX: use atoms ? */
static const char js_overloadable_operator_names[JS_OVOP_COUNT][4] = {
    "+",
    "-",
    "*",
    "/",
    "%",
    "**",
    "|",
    "&",
    "^",
    "<<",
    ">>",
    ">>>",
    "==",
    "<",
    "pos",
    "neg",
    "++",
    "--",
    "~",
};

static int get_ovop_from_opcode(OPCodeEnum op)
{
    switch(op) {
    case OP_add:
        return JS_OVOP_ADD;
    case OP_sub:
        return JS_OVOP_SUB;
    case OP_mul:
        return JS_OVOP_MUL;
    case OP_div:
        return JS_OVOP_DIV;
    case OP_mod:
    case OP_math_mod:
        return JS_OVOP_MOD;
    case OP_pow:
        return JS_OVOP_POW;
    case OP_or:
        return JS_OVOP_OR;
    case OP_and:
        return JS_OVOP_AND;
    case OP_xor:
        return JS_OVOP_XOR;
    case OP_shl:
        return JS_OVOP_SHL;
    case OP_sar:
        return JS_OVOP_SAR;
    case OP_shr:
        return JS_OVOP_SHR;
    case OP_eq:
    case OP_neq:
        return JS_OVOP_EQ;
    case OP_lt:
    case OP_lte:
    case OP_gt:
    case OP_gte:
        return JS_OVOP_LESS;
    case OP_plus:
        return JS_OVOP_POS;
    case OP_neg:
        return JS_OVOP_NEG;
    case OP_inc:
        return JS_OVOP_INC;
    case OP_dec:
        return JS_OVOP_DEC;
    default:
        abort();
    }
}

/* return NULL if not present */
static JSObject *find_binary_op(JSBinaryOperatorDef *def,
                                uint32_t operator_index,
                                JSOverloadableOperatorEnum op)
{
    JSBinaryOperatorDefEntry *ent;
    int i;
    for(i = 0; i < def->count; i++) {
        ent = &def->tab[i];
        if (ent->operator_index == operator_index)
            return ent->ops[op];
    }
    return NULL;
}

/* return -1 if exception, 0 if no operator overloading, 1 if
   overloaded operator called */
[[nodiscard]] static int js_call_binary_op_fallback(JSContext *ctx,
                                                  JSValue *pret,
                                                  JSValueConst op1,
                                                  JSValueConst op2,
                                                  OPCodeEnum op,
                                                  BOOL is_numeric,
                                                  int hint)
{
    JSValue opset1_obj, opset2_obj, method, ret, new_op1, new_op2;
    JSOperatorSetData *opset1, *opset2;
    JSOverloadableOperatorEnum ovop;
    JSObject *p;
    JSValueConst args[2];

    if (!ctx->allow_operator_overloading)
        return 0;

    opset2_obj = JS_UNDEFINED;
    opset1_obj = JS_GetProperty(ctx, op1, JS_ATOM_Symbol_operatorSet);
    if (JS_IsException(opset1_obj))
        goto exception;
    if (JS_IsUndefined(opset1_obj))
        return 0;
    opset1 = JS_GetOpaque2(ctx, opset1_obj, JS_CLASS_OPERATOR_SET);
    if (!opset1)
        goto exception;

    opset2_obj = JS_GetProperty(ctx, op2, JS_ATOM_Symbol_operatorSet);
    if (JS_IsException(opset2_obj))
        goto exception;
    if (JS_IsUndefined(opset2_obj)) {
        JS_FreeValue(ctx, opset1_obj);
        return 0;
    }
    opset2 = JS_GetOpaque2(ctx, opset2_obj, JS_CLASS_OPERATOR_SET);
    if (!opset2)
        goto exception;

    if (opset1->is_primitive && opset2->is_primitive) {
        JS_FreeValue(ctx, opset1_obj);
        JS_FreeValue(ctx, opset2_obj);
        return 0;
    }

    ovop = get_ovop_from_opcode(op);

    if (opset1->operator_counter == opset2->operator_counter) {
        p = opset1->self_ops[ovop];
    } else if (opset1->operator_counter > opset2->operator_counter) {
        p = find_binary_op(&opset1->left, opset2->operator_counter, ovop);
    } else {
        p = find_binary_op(&opset2->right, opset1->operator_counter, ovop);
    }
    if (!p) {
        JS_ThrowTypeError(ctx, "operator %s: no function defined",
                          js_overloadable_operator_names[ovop]);
        goto exception;
    }

    if (opset1->is_primitive) {
        if (is_numeric) {
            new_op1 = JS_ToNumeric(ctx, op1);
        } else {
            new_op1 = JS_ToPrimitive(ctx, op1, hint);
        }
        if (JS_IsException(new_op1))
            goto exception;
    } else {
        new_op1 = JS_DupValue(ctx, op1);
    }

    if (opset2->is_primitive) {
        if (is_numeric) {
            new_op2 = JS_ToNumeric(ctx, op2);
        } else {
            new_op2 = JS_ToPrimitive(ctx, op2, hint);
        }
        if (JS_IsException(new_op2)) {
            JS_FreeValue(ctx, new_op1);
            goto exception;
        }
    } else {
        new_op2 = JS_DupValue(ctx, op2);
    }

    /* XXX: could apply JS_ToPrimitive() if primitive type so that the
       operator function does not get a value object */

    method = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p));
    if (ovop == JS_OVOP_LESS && (op == OP_lte || op == OP_gt)) {
        args[0] = new_op2;
        args[1] = new_op1;
    } else {
        args[0] = new_op1;
        args[1] = new_op2;
    }
    ret = JS_CallFree(ctx, method, JS_UNDEFINED, 2, args);
    JS_FreeValue(ctx, new_op1);
    JS_FreeValue(ctx, new_op2);
    if (JS_IsException(ret))
        goto exception;
    if (ovop == JS_OVOP_EQ) {
        BOOL res = JS_ToBoolFree(ctx, ret);
        if (op == OP_neq)
            res ^= 1;
        ret = JS_NewBool(ctx, res);
    } else if (ovop == JS_OVOP_LESS) {
        if (JS_IsUndefined(ret)) {
            ret = JS_FALSE;
        } else {
            BOOL res = JS_ToBoolFree(ctx, ret);
            if (op == OP_lte || op == OP_gte)
                res ^= 1;
            ret = JS_NewBool(ctx, res);
        }
    }
    JS_FreeValue(ctx, opset1_obj);
    JS_FreeValue(ctx, opset2_obj);
    *pret = ret;
    return 1;
 exception:
    JS_FreeValue(ctx, opset1_obj);
    JS_FreeValue(ctx, opset2_obj);
    *pret = JS_UNDEFINED;
    return -1;
}

/* try to call the operation on the operatorSet field of 'obj'. Only
   used for "/" and "**" on the BigInt prototype in math mode */
[[nodiscard]] static int js_call_binary_op_simple(JSContext *ctx,
                                                JSValue *pret,
                                                JSValueConst obj,
                                                JSValueConst op1,
                                                JSValueConst op2,
                                                OPCodeEnum op)
{
    JSValue opset1_obj, method, ret, new_op1, new_op2;
    JSOperatorSetData *opset1;
    JSOverloadableOperatorEnum ovop;
    JSObject *p;
    JSValueConst args[2];

    opset1_obj = JS_GetProperty(ctx, obj, JS_ATOM_Symbol_operatorSet);
    if (JS_IsException(opset1_obj))
        goto exception;
    if (JS_IsUndefined(opset1_obj))
        return 0;
    opset1 = JS_GetOpaque2(ctx, opset1_obj, JS_CLASS_OPERATOR_SET);
    if (!opset1)
        goto exception;
    ovop = get_ovop_from_opcode(op);

    p = opset1->self_ops[ovop];
    if (!p) {
        JS_FreeValue(ctx, opset1_obj);
        return 0;
    }

    new_op1 = JS_ToNumeric(ctx, op1);
    if (JS_IsException(new_op1))
        goto exception;
    new_op2 = JS_ToNumeric(ctx, op2);
    if (JS_IsException(new_op2)) {
        JS_FreeValue(ctx, new_op1);
        goto exception;
    }

    method = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p));
    args[0] = new_op1;
    args[1] = new_op2;
    ret = JS_CallFree(ctx, method, JS_UNDEFINED, 2, args);
    JS_FreeValue(ctx, new_op1);
    JS_FreeValue(ctx, new_op2);
    if (JS_IsException(ret))
        goto exception;
    JS_FreeValue(ctx, opset1_obj);
    *pret = ret;
    return 1;
 exception:
    JS_FreeValue(ctx, opset1_obj);
    *pret = JS_UNDEFINED;
    return -1;
}

/* return -1 if exception, 0 if no operator overloading, 1 if
   overloaded operator called */
[[nodiscard]] static int js_call_unary_op_fallback(JSContext *ctx,
                                                 JSValue *pret,
                                                 JSValueConst op1,
                                                 OPCodeEnum op)
{
    JSValue opset1_obj, method, ret;
    JSOperatorSetData *opset1;
    JSOverloadableOperatorEnum ovop;
    JSObject *p;

    if (!ctx->allow_operator_overloading)
        return 0;

    opset1_obj = JS_GetProperty(ctx, op1, JS_ATOM_Symbol_operatorSet);
    if (JS_IsException(opset1_obj))
        goto exception;
    if (JS_IsUndefined(opset1_obj))
        return 0;
    opset1 = JS_GetOpaque2(ctx, opset1_obj, JS_CLASS_OPERATOR_SET);
    if (!opset1)
        goto exception;
    if (opset1->is_primitive) {
        JS_FreeValue(ctx, opset1_obj);
        return 0;
    }

    ovop = get_ovop_from_opcode(op);

    p = opset1->self_ops[ovop];
    if (!p) {
        JS_ThrowTypeError(ctx, "no overloaded operator %s",
                          js_overloadable_operator_names[ovop]);
        goto exception;
    }
    method = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p));
    ret = JS_CallFree(ctx, method, JS_UNDEFINED, 1, &op1);
    if (JS_IsException(ret))
        goto exception;
    JS_FreeValue(ctx, opset1_obj);
    *pret = ret;
    return 1;
 exception:
    JS_FreeValue(ctx, opset1_obj);
    *pret = JS_UNDEFINED;
    return -1;
}

static JSValue throw_bf_exception(JSContext *ctx, int status)
{
    const char *str;
    if (status & BF_ST_MEM_ERROR)
        return JS_ThrowOutOfMemory(ctx);
    if (status & BF_ST_DIVIDE_ZERO) {
        str = "division by zero";
    } else if (status & BF_ST_INVALID_OP) {
        str = "invalid operation";
    } else {
        str = "integer overflow";
    }
    return JS_ThrowRangeError(ctx, "%s", str);
}

static int js_unary_arith_bigint(JSContext *ctx,
                                 JSValue *pres, OPCodeEnum op, JSValue op1)
{
    bf_t a_s, *r, *a;
    int ret, v;
    JSValue res;

    if (op == OP_plus && !is_math_mode(ctx)) {
        JS_ThrowTypeError(ctx, "bigint argument with unary +");
        JS_FreeValue(ctx, op1);
        return -1;
    }
    res = JS_NewBigInt(ctx);
    if (JS_IsException(res)) {
        JS_FreeValue(ctx, op1);
        return -1;
    }
    r = JS_GetBigInt(res);
    a = JS_ToBigInt(ctx, &a_s, op1);
    ret = 0;
    switch(op) {
    case OP_inc:
    case OP_dec:
        v = 2 * (op - OP_dec) - 1;
        ret = bf_add_si(r, a, v, BF_PREC_INF, BF_RNDZ);
        break;
    case OP_plus:
        ret = bf_set(r, a);
        break;
    case OP_neg:
        ret = bf_set(r, a);
        bf_neg(r);
        break;
    case OP_not:
        ret = bf_add_si(r, a, 1, BF_PREC_INF, BF_RNDZ);
        bf_neg(r);
        break;
    default:
        abort();
    }
    JS_FreeBigInt(ctx, a, &a_s);
    JS_FreeValue(ctx, op1);
    if (js_unlikely(ret)) {
        JS_FreeValue(ctx, res);
        throw_bf_exception(ctx, ret);
        return -1;
    }
    res = JS_CompactBigInt(ctx, res);
    *pres = res;
    return 0;
}

static int js_unary_arith_bigfloat(JSContext *ctx,
                                   JSValue *pres, OPCodeEnum op, JSValue op1)
{
    bf_t a_s, *r, *a;
    int ret, v;
    JSValue res;

    if (op == OP_plus && !is_math_mode(ctx)) {
        JS_ThrowTypeError(ctx, "bigfloat argument with unary +");
        JS_FreeValue(ctx, op1);
        return -1;
    }

    res = JS_NewBigFloat(ctx);
    if (JS_IsException(res)) {
        JS_FreeValue(ctx, op1);
        return -1;
    }
    r = JS_GetBigFloat(res);
    a = JS_ToBigFloat(ctx, &a_s, op1);
    ret = 0;
    switch(op) {
    case OP_inc:
    case OP_dec:
        v = 2 * (op - OP_dec) - 1;
        ret = bf_add_si(r, a, v, ctx->fp_env.prec, ctx->fp_env.flags);
        break;
    case OP_plus:
        ret = bf_set(r, a);
        break;
    case OP_neg:
        ret = bf_set(r, a);
        bf_neg(r);
        break;
    default:
        abort();
    }
    if (a == &a_s)
        bf_delete(a);
    JS_FreeValue(ctx, op1);
    if (js_unlikely(ret & BF_ST_MEM_ERROR)) {
        JS_FreeValue(ctx, res);
        throw_bf_exception(ctx, ret);
        return -1;
    }
    *pres = res;
    return 0;
}

static int js_unary_arith_bigdecimal(JSContext *ctx,
                                     JSValue *pres, OPCodeEnum op, JSValue op1)
{
    bfdec_t *r, *a;
    int ret, v;
    JSValue res;

    if (op == OP_plus && !is_math_mode(ctx)) {
        JS_ThrowTypeError(ctx, "bigdecimal argument with unary +");
        JS_FreeValue(ctx, op1);
        return -1;
    }

    res = JS_NewBigDecimal(ctx);
    if (JS_IsException(res)) {
        JS_FreeValue(ctx, op1);
        return -1;
    }
    r = JS_GetBigDecimal(res);
    a = JS_ToBigDecimal(ctx, op1);
    ret = 0;
    switch(op) {
    case OP_inc:
    case OP_dec:
        v = 2 * (op - OP_dec) - 1;
        ret = bfdec_add_si(r, a, v, BF_PREC_INF, BF_RNDZ);
        break;
    case OP_plus:
        ret = bfdec_set(r, a);
        break;
    case OP_neg:
        ret = bfdec_set(r, a);
        bfdec_neg(r);
        break;
    default:
        abort();
    }
    JS_FreeValue(ctx, op1);
    if (js_unlikely(ret)) {
        JS_FreeValue(ctx, res);
        throw_bf_exception(ctx, ret);
        return -1;
    }
    *pres = res;
    return 0;
}

[[nodiscard]] static no_inline int js_unary_arith_slow(JSContext *ctx,
                                                     JSValue *sp,
                                                     OPCodeEnum op)
{
    JSValue op1, val;
    int v, ret;
    uint32_t tag;

    op1 = sp[-1];
    /* fast path for float64 */
    if (JS_TAG_IS_FLOAT64(JS_VALUE_GET_TAG(op1)))
        goto handle_float64;
    if (JS_IsObject(op1)) {
        ret = js_call_unary_op_fallback(ctx, &val, op1, op);
        if (ret < 0)
            return -1;
        if (ret) {
            JS_FreeValue(ctx, op1);
            sp[-1] = val;
            return 0;
        }
    }

    op1 = JS_ToNumericFree(ctx, op1);
    if (JS_IsException(op1))
        goto exception;
    tag = JS_VALUE_GET_TAG(op1);
    switch(tag) {
    case JS_TAG_INT:
        {
            int64_t v64;
            v64 = JS_VALUE_GET_INT(op1);
            switch(op) {
            case OP_inc:
            case OP_dec:
                v = 2 * (op - OP_dec) - 1;
                v64 += v;
                break;
            case OP_plus:
                break;
            case OP_neg:
                if (v64 == 0) {
                    sp[-1] = __JS_NewFloat64(ctx, -0.0);
                    return 0;
                } else {
                    v64 = -v64;
                }
                break;
            default:
                abort();
            }
            sp[-1] = JS_NewInt64(ctx, v64);
        }
        break;
    case JS_TAG_BIG_INT:
    handle_bigint:
        if (ctx->rt->bigint_ops.unary_arith(ctx, sp - 1, op, op1))
            goto exception;
        break;
    case JS_TAG_BIG_FLOAT:
        if (ctx->rt->bigfloat_ops.unary_arith(ctx, sp - 1, op, op1))
            goto exception;
        break;
    case JS_TAG_BIG_DECIMAL:
        if (ctx->rt->bigdecimal_ops.unary_arith(ctx, sp - 1, op, op1))
            goto exception;
        break;
    default:
    handle_float64:
        {
            double d;
            if (is_math_mode(ctx))
                goto handle_bigint;
            d = JS_VALUE_GET_FLOAT64(op1);
            switch(op) {
            case OP_inc:
            case OP_dec:
                v = 2 * (op - OP_dec) - 1;
                d += v;
                break;
            case OP_plus:
                break;
            case OP_neg:
                d = -d;
                break;
            default:
                abort();
            }
            sp[-1] = __JS_NewFloat64(ctx, d);
        }
        break;
    }
    return 0;
 exception:
    sp[-1] = JS_UNDEFINED;
    return -1;
}

[[nodiscard]] static int js_post_inc_slow(JSContext *ctx,
                                        JSValue *sp, OPCodeEnum op)
{
    JSValue op1;

    /* XXX: allow custom operators */
    op1 = sp[-1];
    op1 = JS_ToNumericFree(ctx, op1);
    if (JS_IsException(op1)) {
        sp[-1] = JS_UNDEFINED;
        return -1;
    }
    sp[-1] = op1;
    sp[0] = JS_DupValue(ctx, op1);
    return js_unary_arith_slow(ctx, sp + 1, op - OP_post_dec + OP_dec);
}

static no_inline int js_not_slow(JSContext *ctx, JSValue *sp)
{
    JSValue op1, val;
    int ret;

    op1 = sp[-1];
    if (JS_IsObject(op1)) {
        ret = js_call_unary_op_fallback(ctx, &val, op1, OP_not);
        if (ret < 0)
            return -1;
        if (ret) {
            JS_FreeValue(ctx, op1);
            sp[-1] = val;
            return 0;
        }
    }

    op1 = JS_ToNumericFree(ctx, op1);
    if (JS_IsException(op1))
        goto exception;
    if (is_math_mode(ctx) || JS_VALUE_GET_TAG(op1) == JS_TAG_BIG_INT) {
        if (ctx->rt->bigint_ops.unary_arith(ctx, sp - 1, OP_not, op1))
            goto exception;
    } else {
        int32_t v1;
        if (js_unlikely(JS_ToInt32Free(ctx, &v1, op1)))
            goto exception;
        sp[-1] = JS_NewInt32(ctx, ~v1);
    }
    return 0;
 exception:
    sp[-1] = JS_UNDEFINED;
    return -1;
}

static int js_binary_arith_bigfloat(JSContext *ctx, OPCodeEnum op,
                                    JSValue *pres, JSValue op1, JSValue op2)
{
    bf_t a_s, b_s, *r, *a, *b;
    int ret;
    JSValue res;

    res = JS_NewBigFloat(ctx);
    if (JS_IsException(res)) {
        JS_FreeValue(ctx, op1);
        JS_FreeValue(ctx, op2);
        return -1;
    }
    r = JS_GetBigFloat(res);
    a = JS_ToBigFloat(ctx, &a_s, op1);
    b = JS_ToBigFloat(ctx, &b_s, op2);
    bf_init(ctx->bf_ctx, r);
    switch(op) {
    case OP_add:
        ret = bf_add(r, a, b, ctx->fp_env.prec, ctx->fp_env.flags);
        break;
    case OP_sub:
        ret = bf_sub(r, a, b, ctx->fp_env.prec, ctx->fp_env.flags);
        break;
    case OP_mul:
        ret = bf_mul(r, a, b, ctx->fp_env.prec, ctx->fp_env.flags);
        break;
    case OP_div:
        ret = bf_div(r, a, b, ctx->fp_env.prec, ctx->fp_env.flags);
        break;
    case OP_math_mod:
        /* Euclidian remainder */
        ret = bf_rem(r, a, b, ctx->fp_env.prec, ctx->fp_env.flags,
                     BF_DIVREM_EUCLIDIAN);
        break;
    case OP_mod:
        ret = bf_rem(r, a, b, ctx->fp_env.prec, ctx->fp_env.flags,
                     BF_RNDZ);
        break;
    case OP_pow:
        ret = bf_pow(r, a, b, ctx->fp_env.prec,
                     ctx->fp_env.flags | BF_POW_JS_QUIRKS);
        break;
    default:
        abort();
    }
    if (a == &a_s)
        bf_delete(a);
    if (b == &b_s)
        bf_delete(b);
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    if (js_unlikely(ret & BF_ST_MEM_ERROR)) {
        JS_FreeValue(ctx, res);
        throw_bf_exception(ctx, ret);
        return -1;
    }
    *pres = res;
    return 0;
}

static int js_binary_arith_bigint(JSContext *ctx, OPCodeEnum op,
                                  JSValue *pres, JSValue op1, JSValue op2)
{
    bf_t a_s, b_s, *r, *a, *b;
    int ret;
    JSValue res;

    res = JS_NewBigInt(ctx);
    if (JS_IsException(res))
        goto fail;
    a = JS_ToBigInt(ctx, &a_s, op1);
    if (!a)
        goto fail;
    b = JS_ToBigInt(ctx, &b_s, op2);
    if (!b) {
        JS_FreeBigInt(ctx, a, &a_s);
        goto fail;
    }
    r = JS_GetBigInt(res);
    ret = 0;
    switch(op) {
    case OP_add:
        ret = bf_add(r, a, b, BF_PREC_INF, BF_RNDZ);
        break;
    case OP_sub:
        ret = bf_sub(r, a, b, BF_PREC_INF, BF_RNDZ);
        break;
    case OP_mul:
        ret = bf_mul(r, a, b, BF_PREC_INF, BF_RNDZ);
        break;
    case OP_div:
        if (!is_math_mode(ctx)) {
            bf_t rem_s, *rem = &rem_s;
            bf_init(ctx->bf_ctx, rem);
            ret = bf_divrem(r, rem, a, b, BF_PREC_INF, BF_RNDZ,
                            BF_RNDZ);
            bf_delete(rem);
        } else {
            goto math_mode_div_pow;
        }
        break;
    case OP_math_mod:
        /* Euclidian remainder */
        ret = bf_rem(r, a, b, BF_PREC_INF, BF_RNDZ,
                     BF_DIVREM_EUCLIDIAN) & BF_ST_INVALID_OP;
        break;
    case OP_mod:
        ret = bf_rem(r, a, b, BF_PREC_INF, BF_RNDZ,
                     BF_RNDZ) & BF_ST_INVALID_OP;
        break;
    case OP_pow:
        if (b->sign) {
            if (!is_math_mode(ctx)) {
                ret = BF_ST_INVALID_OP;
            } else {
            math_mode_div_pow:
                JS_FreeValue(ctx, res);
                ret = js_call_binary_op_simple(ctx, &res, ctx->class_proto[JS_CLASS_BIG_INT], op1, op2, op);
                if (ret != 0) {
                    JS_FreeBigInt(ctx, a, &a_s);
                    JS_FreeBigInt(ctx, b, &b_s);
                    JS_FreeValue(ctx, op1);
                    JS_FreeValue(ctx, op2);
                    if (ret < 0) {
                        return -1;
                    } else {
                        *pres = res;
                        return 0;
                    }
                }
                /* if no BigInt power operator defined, return a
                   bigfloat */
                res = JS_NewBigFloat(ctx);
                if (JS_IsException(res)) {
                    JS_FreeBigInt(ctx, a, &a_s);
                    JS_FreeBigInt(ctx, b, &b_s);
                    goto fail;
                }
                r = JS_GetBigFloat(res);
                if (op == OP_div) {
                    ret = bf_div(r, a, b, ctx->fp_env.prec, ctx->fp_env.flags) & BF_ST_MEM_ERROR;
                } else {
                    ret = bf_pow(r, a, b, ctx->fp_env.prec,
                                 ctx->fp_env.flags | BF_POW_JS_QUIRKS) & BF_ST_MEM_ERROR;
                }
                JS_FreeBigInt(ctx, a, &a_s);
                JS_FreeBigInt(ctx, b, &b_s);
                JS_FreeValue(ctx, op1);
                JS_FreeValue(ctx, op2);
                if (js_unlikely(ret)) {
                    JS_FreeValue(ctx, res);
                    throw_bf_exception(ctx, ret);
                    return -1;
                }
                *pres = res;
                return 0;
            }
        } else {
            ret = bf_pow(r, a, b, BF_PREC_INF, BF_RNDZ | BF_POW_JS_QUIRKS);
        }
        break;

        /* logical operations */
    case OP_shl:
    case OP_sar:
        {
            slimb_t v2;
#if LIMB_BITS == 32
            bf_get_int32(&v2, b, 0);
            if (v2 == INT32_MIN)
                v2 = INT32_MIN + 1;
#else
            bf_get_int64(&v2, b, 0);
            if (v2 == INT64_MIN)
                v2 = INT64_MIN + 1;
#endif
            if (op == OP_sar)
                v2 = -v2;
            ret = bf_set(r, a);
            ret |= bf_mul_2exp(r, v2, BF_PREC_INF, BF_RNDZ);
            if (v2 < 0) {
                ret |= bf_rint(r, BF_RNDD) & (BF_ST_OVERFLOW | BF_ST_MEM_ERROR);
            }
        }
        break;
    case OP_and:
        ret = bf_logic_and(r, a, b);
        break;
    case OP_or:
        ret = bf_logic_or(r, a, b);
        break;
    case OP_xor:
        ret = bf_logic_xor(r, a, b);
        break;
    default:
        abort();
    }
    JS_FreeBigInt(ctx, a, &a_s);
    JS_FreeBigInt(ctx, b, &b_s);
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    if (js_unlikely(ret)) {
        JS_FreeValue(ctx, res);
        throw_bf_exception(ctx, ret);
        return -1;
    }
    *pres = JS_CompactBigInt(ctx, res);
    return 0;
 fail:
    JS_FreeValue(ctx, res);
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    return -1;
}

/* b must be a positive integer */
static int js_bfdec_pow(bfdec_t *r, const bfdec_t *a, const bfdec_t *b)
{
    bfdec_t b1;
    int32_t b2;
    int ret;

    bfdec_init(b->ctx, &b1);
    ret = bfdec_set(&b1, b);
    if (ret) {
        bfdec_delete(&b1);
        return ret;
    }
    ret = bfdec_rint(&b1, BF_RNDZ);
    if (ret) {
        bfdec_delete(&b1);
        return BF_ST_INVALID_OP; /* must be an integer */
    }
    ret = bfdec_get_int32(&b2, &b1);
    bfdec_delete(&b1);
    if (ret)
        return ret; /* overflow */
    if (b2 < 0)
        return BF_ST_INVALID_OP; /* must be positive */
    return bfdec_pow_ui(r, a, b2);
}

static int js_binary_arith_bigdecimal(JSContext *ctx, OPCodeEnum op,
                                      JSValue *pres, JSValue op1, JSValue op2)
{
    bfdec_t *r, *a, *b;
    int ret;
    JSValue res;

    res = JS_NewBigDecimal(ctx);
    if (JS_IsException(res))
        goto fail;
    r = JS_GetBigDecimal(res);

    a = JS_ToBigDecimal(ctx, op1);
    if (!a)
        goto fail;
    b = JS_ToBigDecimal(ctx, op2);
    if (!b)
        goto fail;
    switch(op) {
    case OP_add:
        ret = bfdec_add(r, a, b, BF_PREC_INF, BF_RNDZ);
        break;
    case OP_sub:
        ret = bfdec_sub(r, a, b, BF_PREC_INF, BF_RNDZ);
        break;
    case OP_mul:
        ret = bfdec_mul(r, a, b, BF_PREC_INF, BF_RNDZ);
        break;
    case OP_div:
        ret = bfdec_div(r, a, b, BF_PREC_INF, BF_RNDZ);
        break;
    case OP_math_mod:
        /* Euclidian remainder */
        ret = bfdec_rem(r, a, b, BF_PREC_INF, BF_RNDZ, BF_DIVREM_EUCLIDIAN);
        break;
    case OP_mod:
        ret = bfdec_rem(r, a, b, BF_PREC_INF, BF_RNDZ, BF_RNDZ);
        break;
    case OP_pow:
        ret = js_bfdec_pow(r, a, b);
        break;
    default:
        abort();
    }
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    if (js_unlikely(ret)) {
        JS_FreeValue(ctx, res);
        throw_bf_exception(ctx, ret);
        return -1;
    }
    *pres = res;
    return 0;
 fail:
    JS_FreeValue(ctx, res);
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    return -1;
}

[[nodiscard]] static no_inline int js_binary_arith_slow(JSContext *ctx, JSValue *sp,
                                                      OPCodeEnum op)
{
    JSValue op1, op2, res;
    uint32_t tag1, tag2;
    int ret;
    double d1, d2;

    op1 = sp[-2];
    op2 = sp[-1];
    tag1 = JS_VALUE_GET_NORM_TAG(op1);
    tag2 = JS_VALUE_GET_NORM_TAG(op2);
    /* fast path for float operations */
    if (tag1 == JS_TAG_FLOAT64 && tag2 == JS_TAG_FLOAT64) {
        d1 = JS_VALUE_GET_FLOAT64(op1);
        d2 = JS_VALUE_GET_FLOAT64(op2);
        goto handle_float64;
    }

    /* try to call an overloaded operator */
    if ((tag1 == JS_TAG_OBJECT &&
         (tag2 != JS_TAG_NULL && tag2 != JS_TAG_UNDEFINED)) ||
        (tag2 == JS_TAG_OBJECT &&
         (tag1 != JS_TAG_NULL && tag1 != JS_TAG_UNDEFINED))) {
        ret = js_call_binary_op_fallback(ctx, &res, op1, op2, op, TRUE, 0);
        if (ret != 0) {
            JS_FreeValue(ctx, op1);
            JS_FreeValue(ctx, op2);
            if (ret < 0) {
                goto exception;
            } else {
                sp[-2] = res;
                return 0;
            }
        }
    }

    op1 = JS_ToNumericFree(ctx, op1);
    if (JS_IsException(op1)) {
        JS_FreeValue(ctx, op2);
        goto exception;
    }
    op2 = JS_ToNumericFree(ctx, op2);
    if (JS_IsException(op2)) {
        JS_FreeValue(ctx, op1);
        goto exception;
    }
    tag1 = JS_VALUE_GET_NORM_TAG(op1);
    tag2 = JS_VALUE_GET_NORM_TAG(op2);

    if (tag1 == JS_TAG_INT && tag2 == JS_TAG_INT) {
        int32_t v1, v2;
        int64_t v;
        v1 = JS_VALUE_GET_INT(op1);
        v2 = JS_VALUE_GET_INT(op2);
        switch(op) {
        case OP_sub:
            v = (int64_t)v1 - (int64_t)v2;
            break;
        case OP_mul:
            v = (int64_t)v1 * (int64_t)v2;
            if (is_math_mode(ctx) &&
                (v < -MAX_SAFE_INTEGER || v > MAX_SAFE_INTEGER))
                goto handle_bigint;
            if (v == 0 && (v1 | v2) < 0) {
                sp[-2] = __JS_NewFloat64(ctx, -0.0);
                return 0;
            }
            break;
        case OP_div:
            if (is_math_mode(ctx))
                goto handle_bigint;
            sp[-2] = __JS_NewFloat64(ctx, (double)v1 / (double)v2);
            return 0;
        case OP_math_mod:
            if (js_unlikely(v2 == 0)) {
                throw_bf_exception(ctx, BF_ST_DIVIDE_ZERO);
                goto exception;
            }
            v = (int64_t)v1 % (int64_t)v2;
            if (v < 0) {
                if (v2 < 0)
                    v -= v2;
                else
                    v += v2;
            }
            break;
        case OP_mod:
            if (v1 < 0 || v2 <= 0) {
                sp[-2] = JS_NewFloat64(ctx, fmod(v1, v2));
                return 0;
            } else {
                v = (int64_t)v1 % (int64_t)v2;
            }
            break;
        case OP_pow:
            if (!is_math_mode(ctx)) {
                sp[-2] = JS_NewFloat64(ctx, js_pow(v1, v2));
                return 0;
            } else {
                goto handle_bigint;
            }
            break;
        default:
            abort();
        }
        sp[-2] = JS_NewInt64(ctx, v);
    } else if (tag1 == JS_TAG_BIG_DECIMAL || tag2 == JS_TAG_BIG_DECIMAL) {
        if (ctx->rt->bigdecimal_ops.binary_arith(ctx, op, sp - 2, op1, op2))
            goto exception;
    } else if (tag1 == JS_TAG_BIG_FLOAT || tag2 == JS_TAG_BIG_FLOAT) {
        if (ctx->rt->bigfloat_ops.binary_arith(ctx, op, sp - 2, op1, op2))
            goto exception;
    } else if (tag1 == JS_TAG_BIG_INT || tag2 == JS_TAG_BIG_INT) {
    handle_bigint:
        if (ctx->rt->bigint_ops.binary_arith(ctx, op, sp - 2, op1, op2))
            goto exception;
    } else {
        double dr;
        /* float64 result */
        if (JS_ToFloat64Free(ctx, &d1, op1)) {
            JS_FreeValue(ctx, op2);
            goto exception;
        }
        if (JS_ToFloat64Free(ctx, &d2, op2))
            goto exception;
    handle_float64:
        if (is_math_mode(ctx) && is_safe_integer(d1) && is_safe_integer(d2))
            goto handle_bigint;
        switch(op) {
        case OP_sub:
            dr = d1 - d2;
            break;
        case OP_mul:
            dr = d1 * d2;
            break;
        case OP_div:
            dr = d1 / d2;
            break;
        case OP_mod:
            dr = fmod(d1, d2);
            break;
        case OP_math_mod:
            d2 = fabs(d2);
            dr = fmod(d1, d2);
            /* XXX: loss of accuracy if dr < 0 */
            if (dr < 0)
                dr += d2;
            break;
        case OP_pow:
            dr = js_pow(d1, d2);
            break;
        default:
            abort();
        }
        sp[-2] = __JS_NewFloat64(ctx, dr);
    }
    return 0;
 exception:
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

[[nodiscard]] static no_inline int js_add_slow(JSContext *ctx, JSValue *sp)
{
    JSValue op1, op2, res;
    uint32_t tag1, tag2;
    int ret;

    op1 = sp[-2];
    op2 = sp[-1];

    tag1 = JS_VALUE_GET_NORM_TAG(op1);
    tag2 = JS_VALUE_GET_NORM_TAG(op2);
    /* fast path for float64 */
    if (tag1 == JS_TAG_FLOAT64 && tag2 == JS_TAG_FLOAT64) {
        double d1, d2;
        d1 = JS_VALUE_GET_FLOAT64(op1);
        d2 = JS_VALUE_GET_FLOAT64(op2);
        sp[-2] = __JS_NewFloat64(ctx, d1 + d2);
        return 0;
    }

    if (tag1 == JS_TAG_OBJECT || tag2 == JS_TAG_OBJECT) {
        /* try to call an overloaded operator */
        if ((tag1 == JS_TAG_OBJECT &&
             (tag2 != JS_TAG_NULL && tag2 != JS_TAG_UNDEFINED &&
              tag2 != JS_TAG_STRING)) ||
            (tag2 == JS_TAG_OBJECT &&
             (tag1 != JS_TAG_NULL && tag1 != JS_TAG_UNDEFINED &&
              tag1 != JS_TAG_STRING))) {
            ret = js_call_binary_op_fallback(ctx, &res, op1, op2, OP_add,
                                             FALSE, HINT_NONE);
            if (ret != 0) {
                JS_FreeValue(ctx, op1);
                JS_FreeValue(ctx, op2);
                if (ret < 0) {
                    goto exception;
                } else {
                    sp[-2] = res;
                    return 0;
                }
            }
        }

        op1 = JS_ToPrimitiveFree(ctx, op1, HINT_NONE);
        if (JS_IsException(op1)) {
            JS_FreeValue(ctx, op2);
            goto exception;
        }

        op2 = JS_ToPrimitiveFree(ctx, op2, HINT_NONE);
        if (JS_IsException(op2)) {
            JS_FreeValue(ctx, op1);
            goto exception;
        }
        tag1 = JS_VALUE_GET_NORM_TAG(op1);
        tag2 = JS_VALUE_GET_NORM_TAG(op2);
    }

    if (tag1 == JS_TAG_STRING || tag2 == JS_TAG_STRING) {
        sp[-2] = JS_ConcatString(ctx, op1, op2);
        if (JS_IsException(sp[-2]))
            goto exception;
        return 0;
    }

    op1 = JS_ToNumericFree(ctx, op1);
    if (JS_IsException(op1)) {
        JS_FreeValue(ctx, op2);
        goto exception;
    }
    op2 = JS_ToNumericFree(ctx, op2);
    if (JS_IsException(op2)) {
        JS_FreeValue(ctx, op1);
        goto exception;
    }
    tag1 = JS_VALUE_GET_NORM_TAG(op1);
    tag2 = JS_VALUE_GET_NORM_TAG(op2);

    if (tag1 == JS_TAG_INT && tag2 == JS_TAG_INT) {
        int32_t v1, v2;
        int64_t v;
        v1 = JS_VALUE_GET_INT(op1);
        v2 = JS_VALUE_GET_INT(op2);
        v = (int64_t)v1 + (int64_t)v2;
        sp[-2] = JS_NewInt64(ctx, v);
    } else if (tag1 == JS_TAG_BIG_DECIMAL || tag2 == JS_TAG_BIG_DECIMAL) {
        if (ctx->rt->bigdecimal_ops.binary_arith(ctx, OP_add, sp - 2, op1, op2))
            goto exception;
    } else if (tag1 == JS_TAG_BIG_FLOAT || tag2 == JS_TAG_BIG_FLOAT) {
        if (ctx->rt->bigfloat_ops.binary_arith(ctx, OP_add, sp - 2, op1, op2))
            goto exception;
    } else if (tag1 == JS_TAG_BIG_INT || tag2 == JS_TAG_BIG_INT) {
    handle_bigint:
        if (ctx->rt->bigint_ops.binary_arith(ctx, OP_add, sp - 2, op1, op2))
            goto exception;
    } else {
        double d1, d2;
        /* float64 result */
        if (JS_ToFloat64Free(ctx, &d1, op1)) {
            JS_FreeValue(ctx, op2);
            goto exception;
        }
        if (JS_ToFloat64Free(ctx, &d2, op2))
            goto exception;
        if (is_math_mode(ctx) && is_safe_integer(d1) && is_safe_integer(d2))
            goto handle_bigint;
        sp[-2] = __JS_NewFloat64(ctx, d1 + d2);
    }
    return 0;
 exception:
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

[[nodiscard]] static no_inline int js_binary_logic_slow(JSContext *ctx,
                                                      JSValue *sp,
                                                      OPCodeEnum op)
{
    JSValue op1, op2, res;
    int ret;
    uint32_t tag1, tag2;
    uint32_t v1, v2, r;

    op1 = sp[-2];
    op2 = sp[-1];
    tag1 = JS_VALUE_GET_NORM_TAG(op1);
    tag2 = JS_VALUE_GET_NORM_TAG(op2);

    /* try to call an overloaded operator */
    if ((tag1 == JS_TAG_OBJECT &&
         (tag2 != JS_TAG_NULL && tag2 != JS_TAG_UNDEFINED)) ||
        (tag2 == JS_TAG_OBJECT &&
         (tag1 != JS_TAG_NULL && tag1 != JS_TAG_UNDEFINED))) {
        ret = js_call_binary_op_fallback(ctx, &res, op1, op2, op, TRUE, 0);
        if (ret != 0) {
            JS_FreeValue(ctx, op1);
            JS_FreeValue(ctx, op2);
            if (ret < 0) {
                goto exception;
            } else {
                sp[-2] = res;
                return 0;
            }
        }
    }

    op1 = JS_ToNumericFree(ctx, op1);
    if (JS_IsException(op1)) {
        JS_FreeValue(ctx, op2);
        goto exception;
    }
    op2 = JS_ToNumericFree(ctx, op2);
    if (JS_IsException(op2)) {
        JS_FreeValue(ctx, op1);
        goto exception;
    }

    if (is_math_mode(ctx))
        goto bigint_op;

    tag1 = JS_VALUE_GET_TAG(op1);
    tag2 = JS_VALUE_GET_TAG(op2);
    if (tag1 == JS_TAG_BIG_INT || tag2 == JS_TAG_BIG_INT) {
        if (tag1 != tag2) {
            JS_FreeValue(ctx, op1);
            JS_FreeValue(ctx, op2);
            JS_ThrowTypeError(ctx, "both operands must be bigint");
            goto exception;
        } else {
        bigint_op:
            if (ctx->rt->bigint_ops.binary_arith(ctx, op, sp - 2, op1, op2))
                goto exception;
        }
    } else {
        if (js_unlikely(JS_ToInt32Free(ctx, (int32_t *)&v1, op1))) {
            JS_FreeValue(ctx, op2);
            goto exception;
        }
        if (js_unlikely(JS_ToInt32Free(ctx, (int32_t *)&v2, op2)))
            goto exception;
        switch(op) {
        case OP_shl:
            r = v1 << (v2 & 0x1f);
            break;
        case OP_sar:
            r = (int)v1 >> (v2 & 0x1f);
            break;
        case OP_and:
            r = v1 & v2;
            break;
        case OP_or:
            r = v1 | v2;
            break;
        case OP_xor:
            r = v1 ^ v2;
            break;
        default:
            abort();
        }
        sp[-2] = JS_NewInt32(ctx, r);
    }
    return 0;
 exception:
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

/* Note: also used for bigint */
static int js_compare_bigfloat(JSContext *ctx, OPCodeEnum op,
                               JSValue op1, JSValue op2)
{
    bf_t a_s, b_s, *a, *b;
    int res;

    a = JS_ToBigFloat(ctx, &a_s, op1);
    if (!a) {
        JS_FreeValue(ctx, op2);
        return -1;
    }
    b = JS_ToBigFloat(ctx, &b_s, op2);
    if (!b) {
        if (a == &a_s)
            bf_delete(a);
        JS_FreeValue(ctx, op1);
        return -1;
    }
    switch(op) {
    case OP_lt:
        res = bf_cmp_lt(a, b); /* if NaN return false */
        break;
    case OP_lte:
        res = bf_cmp_le(a, b); /* if NaN return false */
        break;
    case OP_gt:
        res = bf_cmp_lt(b, a); /* if NaN return false */
        break;
    case OP_gte:
        res = bf_cmp_le(b, a); /* if NaN return false */
        break;
    case OP_eq:
        res = bf_cmp_eq(a, b); /* if NaN return false */
        break;
    default:
        abort();
    }
    if (a == &a_s)
        bf_delete(a);
    if (b == &b_s)
        bf_delete(b);
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    return res;
}

static int js_compare_bigdecimal(JSContext *ctx, OPCodeEnum op,
                                 JSValue op1, JSValue op2)
{
    bfdec_t *a, *b;
    int res;

    /* Note: binary floats are converted to bigdecimal with
       toString(). It is not mathematically correct but is consistent
       with the BigDecimal() constructor behavior */
    op1 = JS_ToBigDecimalFree(ctx, op1, TRUE);
    if (JS_IsException(op1)) {
        JS_FreeValue(ctx, op2);
        return -1;
    }
    op2 = JS_ToBigDecimalFree(ctx, op2, TRUE);
    if (JS_IsException(op2)) {
        JS_FreeValue(ctx, op1);
        return -1;
    }
    a = JS_ToBigDecimal(ctx, op1);
    b = JS_ToBigDecimal(ctx, op2);

    switch(op) {
    case OP_lt:
        res = bfdec_cmp_lt(a, b); /* if NaN return false */
        break;
    case OP_lte:
        res = bfdec_cmp_le(a, b); /* if NaN return false */
        break;
    case OP_gt:
        res = bfdec_cmp_lt(b, a); /* if NaN return false */
        break;
    case OP_gte:
        res = bfdec_cmp_le(b, a); /* if NaN return false */
        break;
    case OP_eq:
        res = bfdec_cmp_eq(a, b); /* if NaN return false */
        break;
    default:
        abort();
    }
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    return res;
}

static no_inline int js_relational_slow(JSContext *ctx, JSValue *sp,
                                        OPCodeEnum op)
{
    JSValue op1, op2, ret;
    int res;
    uint32_t tag1, tag2;

    op1 = sp[-2];
    op2 = sp[-1];
    tag1 = JS_VALUE_GET_NORM_TAG(op1);
    tag2 = JS_VALUE_GET_NORM_TAG(op2);
    /* try to call an overloaded operator */
    if ((tag1 == JS_TAG_OBJECT &&
         (tag2 != JS_TAG_NULL && tag2 != JS_TAG_UNDEFINED)) ||
        (tag2 == JS_TAG_OBJECT &&
         (tag1 != JS_TAG_NULL && tag1 != JS_TAG_UNDEFINED))) {
        res = js_call_binary_op_fallback(ctx, &ret, op1, op2, op,
                                         FALSE, HINT_NUMBER);
        if (res != 0) {
            JS_FreeValue(ctx, op1);
            JS_FreeValue(ctx, op2);
            if (res < 0) {
                goto exception;
            } else {
                sp[-2] = ret;
                return 0;
            }
        }
    }
    op1 = JS_ToPrimitiveFree(ctx, op1, HINT_NUMBER);
    if (JS_IsException(op1)) {
        JS_FreeValue(ctx, op2);
        goto exception;
    }
    op2 = JS_ToPrimitiveFree(ctx, op2, HINT_NUMBER);
    if (JS_IsException(op2)) {
        JS_FreeValue(ctx, op1);
        goto exception;
    }
    tag1 = JS_VALUE_GET_NORM_TAG(op1);
    tag2 = JS_VALUE_GET_NORM_TAG(op2);

    if (tag1 == JS_TAG_STRING && tag2 == JS_TAG_STRING) {
        JSString *p1, *p2;
        p1 = JS_VALUE_GET_STRING(op1);
        p2 = JS_VALUE_GET_STRING(op2);
        res = js_string_compare(ctx, p1, p2);
        switch(op) {
        case OP_lt:
            res = (res < 0);
            break;
        case OP_lte:
            res = (res <= 0);
            break;
        case OP_gt:
            res = (res > 0);
            break;
        default:
        case OP_gte:
            res = (res >= 0);
            break;
        }
        JS_FreeValue(ctx, op1);
        JS_FreeValue(ctx, op2);
    } else if ((tag1 <= JS_TAG_NULL || tag1 == JS_TAG_FLOAT64) &&
               (tag2 <= JS_TAG_NULL || tag2 == JS_TAG_FLOAT64)) {
        /* fast path for float64/int */
        goto float64_compare;
    } else {
        if (((tag1 == JS_TAG_BIG_INT && tag2 == JS_TAG_STRING) ||
             (tag2 == JS_TAG_BIG_INT && tag1 == JS_TAG_STRING)) &&
            !is_math_mode(ctx)) {
            if (tag1 == JS_TAG_STRING) {
                op1 = JS_StringToBigInt(ctx, op1);
                if (JS_VALUE_GET_TAG(op1) != JS_TAG_BIG_INT)
                    goto invalid_bigint_string;
            }
            if (tag2 == JS_TAG_STRING) {
                op2 = JS_StringToBigInt(ctx, op2);
                if (JS_VALUE_GET_TAG(op2) != JS_TAG_BIG_INT) {
                invalid_bigint_string:
                    JS_FreeValue(ctx, op1);
                    JS_FreeValue(ctx, op2);
                    res = FALSE;
                    goto done;
                }
            }
        } else {
            op1 = JS_ToNumericFree(ctx, op1);
            if (JS_IsException(op1)) {
                JS_FreeValue(ctx, op2);
                goto exception;
            }
            op2 = JS_ToNumericFree(ctx, op2);
            if (JS_IsException(op2)) {
                JS_FreeValue(ctx, op1);
                goto exception;
            }
        }

        tag1 = JS_VALUE_GET_NORM_TAG(op1);
        tag2 = JS_VALUE_GET_NORM_TAG(op2);

        if (tag1 == JS_TAG_BIG_DECIMAL || tag2 == JS_TAG_BIG_DECIMAL) {
            res = ctx->rt->bigdecimal_ops.compare(ctx, op, op1, op2);
            if (res < 0)
                goto exception;
        } else if (tag1 == JS_TAG_BIG_FLOAT || tag2 == JS_TAG_BIG_FLOAT) {
            res = ctx->rt->bigfloat_ops.compare(ctx, op, op1, op2);
            if (res < 0)
                goto exception;
        } else if (tag1 == JS_TAG_BIG_INT || tag2 == JS_TAG_BIG_INT) {
            res = ctx->rt->bigint_ops.compare(ctx, op, op1, op2);
            if (res < 0)
                goto exception;
        } else {
            double d1, d2;

        float64_compare:
            /* can use floating point comparison */
            if (tag1 == JS_TAG_FLOAT64) {
                d1 = JS_VALUE_GET_FLOAT64(op1);
            } else {
                d1 = JS_VALUE_GET_INT(op1);
            }
            if (tag2 == JS_TAG_FLOAT64) {
                d2 = JS_VALUE_GET_FLOAT64(op2);
            } else {
                d2 = JS_VALUE_GET_INT(op2);
            }
            switch(op) {
            case OP_lt:
                res = (d1 < d2); /* if NaN return false */
                break;
            case OP_lte:
                res = (d1 <= d2); /* if NaN return false */
                break;
            case OP_gt:
                res = (d1 > d2); /* if NaN return false */
                break;
            default:
            case OP_gte:
                res = (d1 >= d2); /* if NaN return false */
                break;
            }
        }
    }
 done:
    sp[-2] = JS_NewBool(ctx, res);
    return 0;
 exception:
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

static BOOL tag_is_number(uint32_t tag)
{
    return (tag == JS_TAG_INT || tag == JS_TAG_BIG_INT ||
            tag == JS_TAG_FLOAT64 || tag == JS_TAG_BIG_FLOAT ||
            tag == JS_TAG_BIG_DECIMAL);
}

[[nodiscard]] static no_inline int js_eq_slow(JSContext *ctx, JSValue *sp,
                                            BOOL is_neq)
{
    JSValue op1, op2, ret;
    int res;
    uint32_t tag1, tag2;

    op1 = sp[-2];
    op2 = sp[-1];
 redo:
    tag1 = JS_VALUE_GET_NORM_TAG(op1);
    tag2 = JS_VALUE_GET_NORM_TAG(op2);
    if (tag_is_number(tag1) && tag_is_number(tag2)) {
        if (tag1 == JS_TAG_INT && tag2 == JS_TAG_INT) {
            res = JS_VALUE_GET_INT(op1) == JS_VALUE_GET_INT(op2);
        } else if ((tag1 == JS_TAG_FLOAT64 &&
                    (tag2 == JS_TAG_INT || tag2 == JS_TAG_FLOAT64)) ||
                   (tag2 == JS_TAG_FLOAT64 &&
                    (tag1 == JS_TAG_INT || tag1 == JS_TAG_FLOAT64))) {
            double d1, d2;
            if (tag1 == JS_TAG_FLOAT64) {
                d1 = JS_VALUE_GET_FLOAT64(op1);
            } else {
                d1 = JS_VALUE_GET_INT(op1);
            }
            if (tag2 == JS_TAG_FLOAT64) {
                d2 = JS_VALUE_GET_FLOAT64(op2);
            } else {
                d2 = JS_VALUE_GET_INT(op2);
            }
            res = (d1 == d2);
        } else if (tag1 == JS_TAG_BIG_DECIMAL || tag2 == JS_TAG_BIG_DECIMAL) {
            res = ctx->rt->bigdecimal_ops.compare(ctx, OP_eq, op1, op2);
            if (res < 0)
                goto exception;
        } else if (tag1 == JS_TAG_BIG_FLOAT || tag2 == JS_TAG_BIG_FLOAT) {
            res = ctx->rt->bigfloat_ops.compare(ctx, OP_eq, op1, op2);
            if (res < 0)
                goto exception;
        } else {
            res = ctx->rt->bigint_ops.compare(ctx, OP_eq, op1, op2);
            if (res < 0)
                goto exception;
        }
    } else if (tag1 == tag2) {
        if (tag1 == JS_TAG_OBJECT) {
            /* try the fallback operator */
            res = js_call_binary_op_fallback(ctx, &ret, op1, op2,
                                             is_neq ? OP_neq : OP_eq,
                                             FALSE, HINT_NONE);
            if (res != 0) {
                JS_FreeValue(ctx, op1);
                JS_FreeValue(ctx, op2);
                if (res < 0) {
                    goto exception;
                } else {
                    sp[-2] = ret;
                    return 0;
                }
            }
        }
        res = js_strict_eq2(ctx, op1, op2, JS_EQ_STRICT);
    } else if ((tag1 == JS_TAG_NULL && tag2 == JS_TAG_UNDEFINED) ||
               (tag2 == JS_TAG_NULL && tag1 == JS_TAG_UNDEFINED)) {
        res = TRUE;
    } else if ((tag1 == JS_TAG_STRING && tag_is_number(tag2)) ||
               (tag2 == JS_TAG_STRING && tag_is_number(tag1))) {

        if ((tag1 == JS_TAG_BIG_INT || tag2 == JS_TAG_BIG_INT) &&
            !is_math_mode(ctx)) {
            if (tag1 == JS_TAG_STRING) {
                op1 = JS_StringToBigInt(ctx, op1);
                if (JS_VALUE_GET_TAG(op1) != JS_TAG_BIG_INT)
                    goto invalid_bigint_string;
            }
            if (tag2 == JS_TAG_STRING) {
                op2 = JS_StringToBigInt(ctx, op2);
                if (JS_VALUE_GET_TAG(op2) != JS_TAG_BIG_INT) {
                invalid_bigint_string:
                    JS_FreeValue(ctx, op1);
                    JS_FreeValue(ctx, op2);
                    res = FALSE;
                    goto done;
                }
            }
        } else {
            op1 = JS_ToNumericFree(ctx, op1);
            if (JS_IsException(op1)) {
                JS_FreeValue(ctx, op2);
                goto exception;
            }
            op2 = JS_ToNumericFree(ctx, op2);
            if (JS_IsException(op2)) {
                JS_FreeValue(ctx, op1);
                goto exception;
            }
        }
        res = js_strict_eq(ctx, op1, op2);
    } else if (tag1 == JS_TAG_BOOL) {
        op1 = JS_NewInt32(ctx, JS_VALUE_GET_INT(op1));
        goto redo;
    } else if (tag2 == JS_TAG_BOOL) {
        op2 = JS_NewInt32(ctx, JS_VALUE_GET_INT(op2));
        goto redo;
    } else if ((tag1 == JS_TAG_OBJECT &&
                (tag_is_number(tag2) || tag2 == JS_TAG_STRING || tag2 == JS_TAG_SYMBOL)) ||
               (tag2 == JS_TAG_OBJECT &&
                (tag_is_number(tag1) || tag1 == JS_TAG_STRING || tag1 == JS_TAG_SYMBOL))) {

        /* try the fallback operator */
        res = js_call_binary_op_fallback(ctx, &ret, op1, op2,
                                         is_neq ? OP_neq : OP_eq,
                                         FALSE, HINT_NONE);
        if (res != 0) {
            JS_FreeValue(ctx, op1);
            JS_FreeValue(ctx, op2);
            if (res < 0) {
                goto exception;
            } else {
                sp[-2] = ret;
                return 0;
            }
        }

        op1 = JS_ToPrimitiveFree(ctx, op1, HINT_NONE);
        if (JS_IsException(op1)) {
            JS_FreeValue(ctx, op2);
            goto exception;
        }
        op2 = JS_ToPrimitiveFree(ctx, op2, HINT_NONE);
        if (JS_IsException(op2)) {
            JS_FreeValue(ctx, op1);
            goto exception;
        }
        goto redo;
    } else {
        /* IsHTMLDDA object is equivalent to undefined for '==' and '!=' */
        if ((JS_IsHTMLDDA(ctx, op1) &&
             (tag2 == JS_TAG_NULL || tag2 == JS_TAG_UNDEFINED)) ||
            (JS_IsHTMLDDA(ctx, op2) &&
             (tag1 == JS_TAG_NULL || tag1 == JS_TAG_UNDEFINED))) {
            res = TRUE;
        } else {
            res = FALSE;
        }
        JS_FreeValue(ctx, op1);
        JS_FreeValue(ctx, op2);
    }
 done:
    sp[-2] = JS_NewBool(ctx, res ^ is_neq);
    return 0;
 exception:
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

static no_inline int js_shr_slow(JSContext *ctx, JSValue *sp)
{
    JSValue op1, op2;
    uint32_t v1, v2, r;

    op1 = sp[-2];
    op2 = sp[-1];
    op1 = JS_ToNumericFree(ctx, op1);
    if (JS_IsException(op1)) {
        JS_FreeValue(ctx, op2);
        goto exception;
    }
    op2 = JS_ToNumericFree(ctx, op2);
    if (JS_IsException(op2)) {
        JS_FreeValue(ctx, op1);
        goto exception;
    }
    /* XXX: could forbid >>> in bignum mode */
    if (!is_math_mode(ctx) &&
        (JS_VALUE_GET_TAG(op1) == JS_TAG_BIG_INT ||
         JS_VALUE_GET_TAG(op2) == JS_TAG_BIG_INT)) {
        JS_ThrowTypeError(ctx, "bigint operands are forbidden for >>>");
        JS_FreeValue(ctx, op1);
        JS_FreeValue(ctx, op2);
        goto exception;
    }
    /* cannot give an exception */
    JS_ToUint32Free(ctx, &v1, op1);
    JS_ToUint32Free(ctx, &v2, op2);
    r = v1 >> (v2 & 0x1f);
    sp[-2] = JS_NewUint32(ctx, r);
    return 0;
 exception:
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

static JSValue js_mul_pow10_to_float64(JSContext *ctx, const bf_t *a,
                                       int64_t exponent)
{
    bf_t r_s, *r = &r_s;
    double d;
    int ret;

    /* always convert to Float64 */
    bf_init(ctx->bf_ctx, r);
    ret = bf_mul_pow_radix(r, a, 10, exponent,
                           53, bf_set_exp_bits(11) | BF_RNDN |
                           BF_FLAG_SUBNORMAL);
    bf_get_float64(r, &d, BF_RNDN);
    bf_delete(r);
    if (ret & BF_ST_MEM_ERROR)
        return JS_ThrowOutOfMemory(ctx);
    else
        return __JS_NewFloat64(ctx, d);
}

static no_inline int js_mul_pow10(JSContext *ctx, JSValue *sp)
{
    bf_t a_s, *a, *r;
    JSValue op1, op2, res;
    int64_t e;
    int ret;

    res = JS_NewBigFloat(ctx);
    if (JS_IsException(res))
        return -1;
    r = JS_GetBigFloat(res);
    op1 = sp[-2];
    op2 = sp[-1];
    a = JS_ToBigFloat(ctx, &a_s, op1);
    if (!a)
        return -1;
    if (JS_IsBigInt(ctx, op2)) {
        ret = JS_ToBigInt64(ctx, &e, op2);
    } else {
        ret = JS_ToInt64(ctx, &e, op2);
    }
    if (ret) {
        if (a == &a_s)
            bf_delete(a);
        JS_FreeValue(ctx, res);
        return -1;
    }

    bf_mul_pow_radix(r, a, 10, e, ctx->fp_env.prec, ctx->fp_env.flags);
    if (a == &a_s)
        bf_delete(a);
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    sp[-2] = res;
    return 0;
}

#else /* !CONFIG_BIGNUM */

static JSValue JS_ThrowUnsupportedBigint(JSContext *ctx)
{
    return JS_ThrowTypeError(ctx, "bigint is not supported");
}

inline JSValue JS_NewBigInt64(JSContext *ctx, int64_t v)
{
    return JS_ThrowUnsupportedBigint(ctx);
}

inline JSValue JS_NewBigUint64(JSContext *ctx, uint64_t v)
{
    return JS_ThrowUnsupportedBigint(ctx);
}

inline int JS_ToBigInt64(JSContext *ctx, int64_t *pres, JSValueConst val)
{
    JS_ThrowUnsupportedBigint(ctx);
    *pres = 0;
    return -1;
}

[[nodiscard]] static no_inline int js_unary_arith_slow(JSContext *ctx,
                                                     JSValue *sp,
                                                     OPCodeEnum op)
{
    JSValue op1;
    double d;

    op1 = sp[-1];
    if (js_unlikely(JS_ToFloat64Free(ctx, &d, op1))) {
        sp[-1] = JS_UNDEFINED;
        return -1;
    }
    switch(op) {
    case OP_inc:
        d++;
        break;
    case OP_dec:
        d--;
        break;
    case OP_plus:
        break;
    case OP_neg:
        d = -d;
        break;
    default:
        abort();
    }
    sp[-1] = JS_NewFloat64(ctx, d);
    return 0;
}

/* specific case necessary for correct return value semantics */
[[nodiscard]] static int js_post_inc_slow(JSContext *ctx,
                                        JSValue *sp, OPCodeEnum op)
{
    JSValue op1;
    double d, r;

    op1 = sp[-1];
    if (js_unlikely(JS_ToFloat64Free(ctx, &d, op1))) {
        sp[-1] = JS_UNDEFINED;
        return -1;
    }
    r = d + 2 * (op - OP_post_dec) - 1;
    sp[0] = JS_NewFloat64(ctx, r);
    sp[-1] = JS_NewFloat64(ctx, d);
    return 0;
}

[[nodiscard]] static no_inline int js_binary_arith_slow(JSContext *ctx, JSValue *sp,
                                                      OPCodeEnum op)
{
    JSValue op1, op2;
    double d1, d2, r;

    op1 = sp[-2];
    op2 = sp[-1];
    if (js_unlikely(JS_ToFloat64Free(ctx, &d1, op1))) {
        JS_FreeValue(ctx, op2);
        goto exception;
    }
    if (js_unlikely(JS_ToFloat64Free(ctx, &d2, op2))) {
        goto exception;
    }
    switch(op) {
    case OP_sub:
        r = d1 - d2;
        break;
    case OP_mul:
        r = d1 * d2;
        break;
    case OP_div:
        r = d1 / d2;
        break;
    case OP_mod:
        r = fmod(d1, d2);
        break;
    case OP_pow:
        r = js_pow(d1, d2);
        break;
    default:
        abort();
    }
    sp[-2] = JS_NewFloat64(ctx, r);
    return 0;
 exception:
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

static no_inline int js_add_slow(JSContext *ctx, JSValue *sp)
{
    JSValue op1, op2;
    uint32_t tag1, tag2;

    op1 = sp[-2];
    op2 = sp[-1];
    tag1 = JS_VALUE_GET_TAG(op1);
    tag2 = JS_VALUE_GET_TAG(op2);
    if ((tag1 == JS_TAG_INT || JS_TAG_IS_FLOAT64(tag1)) &&
        (tag2 == JS_TAG_INT || JS_TAG_IS_FLOAT64(tag2))) {
        goto add_numbers;
    } else {
        op1 = JS_ToPrimitiveFree(ctx, op1, HINT_NONE);
        if (JS_IsException(op1)) {
            JS_FreeValue(ctx, op2);
            goto exception;
        }
        op2 = JS_ToPrimitiveFree(ctx, op2, HINT_NONE);
        if (JS_IsException(op2)) {
            JS_FreeValue(ctx, op1);
            goto exception;
        }
        tag1 = JS_VALUE_GET_TAG(op1);
        tag2 = JS_VALUE_GET_TAG(op2);
        if (tag1 == JS_TAG_STRING || tag2 == JS_TAG_STRING) {
            sp[-2] = JS_ConcatString(ctx, op1, op2);
            if (JS_IsException(sp[-2]))
                goto exception;
        } else {
            double d1, d2;
        add_numbers:
            if (JS_ToFloat64Free(ctx, &d1, op1)) {
                JS_FreeValue(ctx, op2);
                goto exception;
            }
            if (JS_ToFloat64Free(ctx, &d2, op2))
                goto exception;
            sp[-2] = JS_NewFloat64(ctx, d1 + d2);
        }
    }
    return 0;
 exception:
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

[[nodiscard]] static no_inline int js_binary_logic_slow(JSContext *ctx,
                                                      JSValue *sp,
                                                      OPCodeEnum op)
{
    JSValue op1, op2;
    uint32_t v1, v2, r;

    op1 = sp[-2];
    op2 = sp[-1];
    if (js_unlikely(JS_ToInt32Free(ctx, (int32_t *)&v1, op1))) {
        JS_FreeValue(ctx, op2);
        goto exception;
    }
    if (js_unlikely(JS_ToInt32Free(ctx, (int32_t *)&v2, op2)))
        goto exception;
    switch(op) {
    case OP_shl:
        r = v1 << (v2 & 0x1f);
        break;
    case OP_sar:
        r = (int)v1 >> (v2 & 0x1f);
        break;
    case OP_and:
        r = v1 & v2;
        break;
    case OP_or:
        r = v1 | v2;
        break;
    case OP_xor:
        r = v1 ^ v2;
        break;
    default:
        abort();
    }
    sp[-2] = JS_NewInt32(ctx, r);
    return 0;
 exception:
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

static no_inline int js_not_slow(JSContext *ctx, JSValue *sp)
{
    int32_t v1;

    if (js_unlikely(JS_ToInt32Free(ctx, &v1, sp[-1]))) {
        sp[-1] = JS_UNDEFINED;
        return -1;
    }
    sp[-1] = JS_NewInt32(ctx, ~v1);
    return 0;
}

static no_inline int js_relational_slow(JSContext *ctx, JSValue *sp,
                                        OPCodeEnum op)
{
    JSValue op1, op2;
    int res;

    op1 = sp[-2];
    op2 = sp[-1];
    op1 = JS_ToPrimitiveFree(ctx, op1, HINT_NUMBER);
    if (JS_IsException(op1)) {
        JS_FreeValue(ctx, op2);
        goto exception;
    }
    op2 = JS_ToPrimitiveFree(ctx, op2, HINT_NUMBER);
    if (JS_IsException(op2)) {
        JS_FreeValue(ctx, op1);
        goto exception;
    }
    if (JS_VALUE_GET_TAG(op1) == JS_TAG_STRING &&
        JS_VALUE_GET_TAG(op2) == JS_TAG_STRING) {
        JSString *p1, *p2;
        p1 = JS_VALUE_GET_STRING(op1);
        p2 = JS_VALUE_GET_STRING(op2);
        res = js_string_compare(ctx, p1, p2);
        JS_FreeValue(ctx, op1);
        JS_FreeValue(ctx, op2);
        switch(op) {
        case OP_lt:
            res = (res < 0);
            break;
        case OP_lte:
            res = (res <= 0);
            break;
        case OP_gt:
            res = (res > 0);
            break;
        default:
        case OP_gte:
            res = (res >= 0);
            break;
        }
    } else {
        double d1, d2;
        if (JS_ToFloat64Free(ctx, &d1, op1)) {
            JS_FreeValue(ctx, op2);
            goto exception;
        }
        if (JS_ToFloat64Free(ctx, &d2, op2))
            goto exception;
        switch(op) {
        case OP_lt:
            res = (d1 < d2); /* if NaN return false */
            break;
        case OP_lte:
            res = (d1 <= d2); /* if NaN return false */
            break;
        case OP_gt:
            res = (d1 > d2); /* if NaN return false */
            break;
        default:
        case OP_gte:
            res = (d1 >= d2); /* if NaN return false */
            break;
        }
    }
    sp[-2] = JS_NewBool(ctx, res);
    return 0;
 exception:
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

[[nodiscard]] static no_inline int js_eq_slow(JSContext *ctx, JSValue *sp,
                                            BOOL is_neq)
{
    JSValue op1, op2;
    int tag1, tag2;
    BOOL res;

    op1 = sp[-2];
    op2 = sp[-1];
 redo:
    tag1 = JS_VALUE_GET_NORM_TAG(op1);
    tag2 = JS_VALUE_GET_NORM_TAG(op2);
    if (tag1 == tag2 ||
        (tag1 == JS_TAG_INT && tag2 == JS_TAG_FLOAT64) ||
        (tag2 == JS_TAG_INT && tag1 == JS_TAG_FLOAT64)) {
        res = js_strict_eq(ctx, op1, op2);
    } else if ((tag1 == JS_TAG_NULL && tag2 == JS_TAG_UNDEFINED) ||
               (tag2 == JS_TAG_NULL && tag1 == JS_TAG_UNDEFINED)) {
        res = TRUE;
    } else if ((tag1 == JS_TAG_STRING && (tag2 == JS_TAG_INT ||
                                   tag2 == JS_TAG_FLOAT64)) ||
        (tag2 == JS_TAG_STRING && (tag1 == JS_TAG_INT ||
                                   tag1 == JS_TAG_FLOAT64))) {
        double d1;
        double d2;
        if (JS_ToFloat64Free(ctx, &d1, op1)) {
            JS_FreeValue(ctx, op2);
            goto exception;
        }
        if (JS_ToFloat64Free(ctx, &d2, op2))
            goto exception;
        res = (d1 == d2);
    } else if (tag1 == JS_TAG_BOOL) {
        op1 = JS_NewInt32(ctx, JS_VALUE_GET_INT(op1));
        goto redo;
    } else if (tag2 == JS_TAG_BOOL) {
        op2 = JS_NewInt32(ctx, JS_VALUE_GET_INT(op2));
        goto redo;
    } else if (tag1 == JS_TAG_OBJECT &&
               (tag2 == JS_TAG_INT || tag2 == JS_TAG_FLOAT64 || tag2 == JS_TAG_STRING || tag2 == JS_TAG_SYMBOL)) {
        op1 = JS_ToPrimitiveFree(ctx, op1, HINT_NONE);
        if (JS_IsException(op1)) {
            JS_FreeValue(ctx, op2);
            goto exception;
        }
        goto redo;
    } else if (tag2 == JS_TAG_OBJECT &&
               (tag1 == JS_TAG_INT || tag1 == JS_TAG_FLOAT64 || tag1 == JS_TAG_STRING || tag1 == JS_TAG_SYMBOL)) {
        op2 = JS_ToPrimitiveFree(ctx, op2, HINT_NONE);
        if (JS_IsException(op2)) {
            JS_FreeValue(ctx, op1);
            goto exception;
        }
        goto redo;
    } else {
        /* IsHTMLDDA object is equivalent to undefined for '==' and '!=' */
        if ((JS_IsHTMLDDA(ctx, op1) &&
             (tag2 == JS_TAG_NULL || tag2 == JS_TAG_UNDEFINED)) ||
            (JS_IsHTMLDDA(ctx, op2) &&
             (tag1 == JS_TAG_NULL || tag1 == JS_TAG_UNDEFINED))) {
            res = TRUE;
        } else {
            res = FALSE;
        }
        JS_FreeValue(ctx, op1);
        JS_FreeValue(ctx, op2);
    }
    sp[-2] = JS_NewBool(ctx, res ^ is_neq);
    return 0;
 exception:
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

static no_inline int js_shr_slow(JSContext *ctx, JSValue *sp)
{
    JSValue op1, op2;
    uint32_t v1, v2, r;

    op1 = sp[-2];
    op2 = sp[-1];
    if (js_unlikely(JS_ToUint32Free(ctx, &v1, op1))) {
        JS_FreeValue(ctx, op2);
        goto exception;
    }
    if (js_unlikely(JS_ToUint32Free(ctx, &v2, op2)))
        goto exception;
    r = v1 >> (v2 & 0x1f);
    sp[-2] = JS_NewUint32(ctx, r);
    return 0;
 exception:
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

#endif /* !CONFIG_BIGNUM */

/* XXX: Should take JSValueConst arguments */
static BOOL js_strict_eq2(JSContext *ctx, JSValue op1, JSValue op2,
                          JSStrictEqModeEnum eq_mode)
{
    BOOL res;
    int tag1, tag2;
    double d1, d2;

    tag1 = JS_VALUE_GET_NORM_TAG(op1);
    tag2 = JS_VALUE_GET_NORM_TAG(op2);
    switch(tag1) {
    case JS_TAG_BOOL:
        if (tag1 != tag2) {
            res = FALSE;
        } else {
            res = JS_VALUE_GET_INT(op1) == JS_VALUE_GET_INT(op2);
            goto done_no_free;
        }
        break;
    case JS_TAG_NULL:
    case JS_TAG_UNDEFINED:
        res = (tag1 == tag2);
        break;
    case JS_TAG_STRING:
        {
            JSString *p1, *p2;
            if (tag1 != tag2) {
                res = FALSE;
            } else {
                p1 = JS_VALUE_GET_STRING(op1);
                p2 = JS_VALUE_GET_STRING(op2);
                res = (js_string_compare(ctx, p1, p2) == 0);
            }
        }
        break;
    case JS_TAG_SYMBOL:
        {
            JSAtomStruct *p1, *p2;
            if (tag1 != tag2) {
                res = FALSE;
            } else {
                p1 = (JSAtomStruct*) JS_VALUE_GET_PTR(op1);
                p2 = (JSAtomStruct*) JS_VALUE_GET_PTR(op2);
                res = (p1 == p2);
            }
        }
        break;
    case JS_TAG_OBJECT:
        if (tag1 != tag2)
            res = FALSE;
        else
            res = JS_VALUE_GET_OBJ(op1) == JS_VALUE_GET_OBJ(op2);
        break;
    case JS_TAG_INT:
        d1 = JS_VALUE_GET_INT(op1);
        if (tag2 == JS_TAG_INT) {
            d2 = JS_VALUE_GET_INT(op2);
            goto number_test;
        } else if (tag2 == JS_TAG_FLOAT64) {
            d2 = JS_VALUE_GET_FLOAT64(op2);
            goto number_test;
        } else {
            res = FALSE;
        }
        break;
    case JS_TAG_FLOAT64:
        d1 = JS_VALUE_GET_FLOAT64(op1);
        if (tag2 == JS_TAG_FLOAT64) {
            d2 = JS_VALUE_GET_FLOAT64(op2);
        } else if (tag2 == JS_TAG_INT) {
            d2 = JS_VALUE_GET_INT(op2);
        } else {
            res = FALSE;
            break;
        }
    number_test:
        if (js_unlikely(eq_mode >= JS_EQ_SAME_VALUE)) {
            JSFloat64Union u1, u2;
            /* NaN is not always normalized, so this test is necessary */
            if (isnan(d1) || isnan(d2)) {
                res = isnan(d1) == isnan(d2);
            } else if (eq_mode == JS_EQ_SAME_VALUE_ZERO) {
                res = (d1 == d2); /* +0 == -0 */
            } else {
                u1.d = d1;
                u2.d = d2;
                res = (u1.u64 == u2.u64); /* +0 != -0 */
            }
        } else {
            res = (d1 == d2); /* if NaN return false and +0 == -0 */
        }
        goto done_no_free;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
        {
            bf_t a_s, *a, b_s, *b;
            if (tag1 != tag2) {
                res = FALSE;
                break;
            }
            a = JS_ToBigFloat(ctx, &a_s, op1);
            b = JS_ToBigFloat(ctx, &b_s, op2);
            res = bf_cmp_eq(a, b);
            if (a == &a_s)
                bf_delete(a);
            if (b == &b_s)
                bf_delete(b);
        }
        break;
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *p1, *p2;
            const bf_t *a, *b;
            if (tag1 != tag2) {
                res = FALSE;
                break;
            }
            p1 = JS_VALUE_GET_PTR(op1);
            p2 = JS_VALUE_GET_PTR(op2);
            a = &p1->num;
            b = &p2->num;
            if (js_unlikely(eq_mode >= JS_EQ_SAME_VALUE)) {
                if (eq_mode == JS_EQ_SAME_VALUE_ZERO &&
                           a->expn == BF_EXP_ZERO && b->expn == BF_EXP_ZERO) {
                    res = TRUE;
                } else {
                    res = (bf_cmp_full(a, b) == 0);
                }
            } else {
                res = bf_cmp_eq(a, b);
            }
        }
        break;
    case JS_TAG_BIG_DECIMAL:
        {
            JSBigDecimal *p1, *p2;
            const bfdec_t *a, *b;
            if (tag1 != tag2) {
                res = FALSE;
                break;
            }
            p1 = JS_VALUE_GET_PTR(op1);
            p2 = JS_VALUE_GET_PTR(op2);
            a = &p1->num;
            b = &p2->num;
            res = bfdec_cmp_eq(a, b);
        }
        break;
#endif
    default:
        res = FALSE;
        break;
    }
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
 done_no_free:
    return res;
}

static BOOL js_strict_eq(JSContext *ctx, JSValue op1, JSValue op2)
{
    return js_strict_eq2(ctx, op1, op2, JS_EQ_STRICT);
}

static BOOL js_same_value(JSContext *ctx, JSValueConst op1, JSValueConst op2)
{
    return js_strict_eq2(ctx,
                         JS_DupValue(ctx, op1), JS_DupValue(ctx, op2),
                         JS_EQ_SAME_VALUE);
}

static BOOL js_same_value_zero(JSContext *ctx, JSValueConst op1, JSValueConst op2)
{
    return js_strict_eq2(ctx,
                         JS_DupValue(ctx, op1), JS_DupValue(ctx, op2),
                         JS_EQ_SAME_VALUE_ZERO);
}

static no_inline int js_strict_eq_slow(JSContext *ctx, JSValue *sp,
                                       BOOL is_neq)
{
    BOOL res;
    res = js_strict_eq(ctx, sp[-2], sp[-1]);
    sp[-2] = JS_NewBool(ctx, res ^ is_neq);
    return 0;
}

[[nodiscard]] static int js_operator_in(JSContext *ctx, JSValue *sp)
{
    JSValue op1, op2;
    JSAtom atom;
    int ret;

    op1 = sp[-2];
    op2 = sp[-1];

    if (JS_VALUE_GET_TAG(op2) != JS_TAG_OBJECT) {
        JS_ThrowTypeError(ctx, "invalid 'in' operand");
        return -1;
    }
    atom = JS_ValueToAtom(ctx, op1);
    if (js_unlikely(atom == JS_ATOM_NULL))
        return -1;
    ret = JS_HasProperty(ctx, op2, atom);
    JS_FreeAtom(ctx, atom);
    if (ret < 0)
        return -1;
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    sp[-2] = JS_NewBool(ctx, ret);
    return 0;
}

[[nodiscard]] static int js_has_unscopable(JSContext *ctx, JSValueConst obj,
                                         JSAtom atom)
{
    JSValue arr, val;
    int ret;

    arr = JS_GetProperty(ctx, obj, JS_ATOM_Symbol_unscopables);
    if (JS_IsException(arr))
        return -1;
    ret = 0;
    if (JS_IsObject(arr)) {
        val = JS_GetProperty(ctx, arr, atom);
        ret = JS_ToBoolFree(ctx, val);
    }
    JS_FreeValue(ctx, arr);
    return ret;
}

[[nodiscard]] static int js_operator_instanceof(JSContext *ctx, JSValue *sp)
{
    JSValue op1, op2;
    BOOL ret;

    op1 = sp[-2];
    op2 = sp[-1];
    ret = JS_IsInstanceOf(ctx, op1, op2);
    if (ret < 0)
        return ret;
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    sp[-2] = JS_NewBool(ctx, ret);
    return 0;
}

[[nodiscard]] static int js_operator_typeof(JSContext *ctx, JSValueConst op1)
{
    JSAtom atom;
    uint32_t tag;

    tag = JS_VALUE_GET_NORM_TAG(op1);
    switch(tag) {
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
        atom = JS_ATOM_bigint;
        break;
    case JS_TAG_BIG_FLOAT:
        atom = JS_ATOM_bigfloat;
        break;
    case JS_TAG_BIG_DECIMAL:
        atom = JS_ATOM_bigdecimal;
        break;
#endif
    case JS_TAG_INT:
    case JS_TAG_FLOAT64:
        atom = JS_ATOM_number;
        break;
    case JS_TAG_UNDEFINED:
        atom = JS_ATOM_undefined;
        break;
    case JS_TAG_BOOL:
        atom = JS_ATOM_boolean;
        break;
    case JS_TAG_STRING:
        atom = JS_ATOM_string;
        break;
    case JS_TAG_OBJECT:
        {
            JSObject *p;
            p = JS_VALUE_GET_OBJ(op1);
            if (js_unlikely(p->is_HTMLDDA))
                atom = JS_ATOM_undefined;
            else if (JS_IsFunction(ctx, op1))
                atom = JS_ATOM_function;
            else
                goto obj_type;
        }
        break;
    case JS_TAG_NULL:
    obj_type:
        atom = JS_ATOM_object;
        break;
    case JS_TAG_SYMBOL:
        atom = JS_ATOM_symbol;
        break;
    default:
        atom = JS_ATOM_unknown;
        break;
    }
    return atom;
}

[[nodiscard]] static int js_operator_delete(JSContext *ctx, JSValue *sp)
{
    JSValue op1, op2;
    JSAtom atom;
    int ret;

    op1 = sp[-2];
    op2 = sp[-1];
    atom = JS_ValueToAtom(ctx, op2);
    if (js_unlikely(atom == JS_ATOM_NULL))
        return -1;
    ret = JS_DeleteProperty(ctx, op1, atom, JS_PROP_THROW_STRICT);
    JS_FreeAtom(ctx, atom);
    if (js_unlikely(ret < 0))
        return -1;
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    sp[-2] = JS_NewBool(ctx, ret);
    return 0;
}

static JSValue js_throw_type_error(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    return JS_ThrowTypeError(ctx, "invalid property access");
}

/* XXX: not 100% compatible, but mozilla seems to use a similar
   implementation to ensure that caller in non strict mode does not
   throw (ES5 compatibility) */
static JSValue js_function_proto_caller(JSContext *ctx, JSValueConst this_val,
                                        int argc, JSValueConst *argv)
{
    JSFunctionBytecode *b = JS_GetFunctionBytecode(this_val);
    if (!b || (b->js_mode & JS_MODE_STRICT) || !b->has_prototype) {
        return js_throw_type_error(ctx, this_val, 0, NULL);
    }
    return JS_UNDEFINED;
}

static JSValue js_function_proto_fileName(JSContext *ctx,
                                          JSValueConst this_val)
{
    JSFunctionBytecode *b = JS_GetFunctionBytecode(this_val);
    if (b && b->has_debug) {
        return JS_AtomToString(ctx, b->debug.filename);
    }
    return JS_UNDEFINED;
}

static JSValue js_function_proto_lineNumber(JSContext *ctx,
                                            JSValueConst this_val)
{
    JSFunctionBytecode *b = JS_GetFunctionBytecode(this_val);
    if (b && b->has_debug) {
        return JS_NewInt32(ctx, b->debug.line_num);
    }
    return JS_UNDEFINED;
}

static int js_arguments_define_own_property(JSContext *ctx,
                                            JSValueConst this_obj,
                                            JSAtom prop, JSValueConst val,
                                            JSValueConst getter, JSValueConst setter, int flags)
{
    JSObject *p;
    uint32_t idx;
    p = JS_VALUE_GET_OBJ(this_obj);
    /* convert to normal array when redefining an existing numeric field */
    if (p->fast_array && JS_AtomIsArrayIndex(ctx, &idx, prop) &&
        idx < p->u.array.count) {
        if (convert_fast_array_to_array(ctx, p))
            return -1;
    }
    /* run the default define own property */
    return JS_DefineProperty(ctx, this_obj, prop, val, getter, setter,
                             flags | JS_PROP_NO_EXOTIC);
}

inline const JSClassExoticMethods js_arguments_exotic_methods = {
    nullptr, nullptr, nullptr, js_arguments_define_own_property, nullptr, nullptr
};

static JSValue js_build_arguments(JSContext *ctx, int argc, JSValueConst *argv)
{
    JSValue val, *tab;
    JSProperty *pr;
    JSObject *p;
    int i;

    val = JS_NewObjectProtoClass(ctx, ctx->class_proto[JS_CLASS_OBJECT],
                                 JS_CLASS_ARGUMENTS);
    if (JS_IsException(val))
        return val;
    p = JS_VALUE_GET_OBJ(val);

    /* add the length field (cannot fail) */
    pr = add_property(ctx, p, JS_ATOM_length,
                      JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
    pr->u.value = JS_NewInt32(ctx, argc);

    /* initialize the fast array part */
    tab = NULL;
    if (argc > 0) {
        tab = (JSValue*) js_malloc(ctx, sizeof(tab[0]) * argc);
        if (!tab) {
            JS_FreeValue(ctx, val);
            return JS_EXCEPTION;
        }
        for(i = 0; i < argc; i++) {
            tab[i] = JS_DupValue(ctx, argv[i]);
        }
    }
    p->u.array.u.values = tab;
    p->u.array.count = argc;

    JS_DefinePropertyValue(ctx, val, JS_ATOM_Symbol_iterator,
                           JS_DupValue(ctx, ctx->array_proto_values),
                           JS_PROP_CONFIGURABLE | JS_PROP_WRITABLE);
    /* add callee property to throw a TypeError in strict mode */
    JS_DefineProperty(ctx, val, JS_ATOM_callee, JS_UNDEFINED,
                      ctx->throw_type_error, ctx->throw_type_error,
                      JS_PROP_HAS_GET | JS_PROP_HAS_SET);
    return val;
}

#define GLOBAL_VAR_OFFSET 0x40000000
#define ARGUMENT_VAR_OFFSET 0x20000000

/* legacy arguments object: add references to the function arguments */
static JSValue js_build_mapped_arguments(JSContext *ctx, int argc,
                                         JSValueConst *argv,
                                         JSStackFrame *sf, int arg_count)
{
    JSValue val;
    JSProperty *pr;
    JSObject *p;
    int i;

    val = JS_NewObjectProtoClass(ctx, ctx->class_proto[JS_CLASS_OBJECT],
                                 JS_CLASS_MAPPED_ARGUMENTS);
    if (JS_IsException(val))
        return val;
    p = JS_VALUE_GET_OBJ(val);

    /* add the length field (cannot fail) */
    pr = add_property(ctx, p, JS_ATOM_length,
                      JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
    pr->u.value = JS_NewInt32(ctx, argc);

    for(i = 0; i < arg_count; i++) {
        JSVarRef *var_ref;
        var_ref = get_var_ref(ctx, sf, i, TRUE);
        if (!var_ref)
            goto fail;
        pr = add_property(ctx, p, __JS_AtomFromUInt32(i), JS_PROP_C_W_E | JS_PROP_VARREF);
        if (!pr) {
            free_var_ref(ctx->rt, var_ref);
            goto fail;
        }
        pr->u.var_ref = var_ref;
    }

    /* the arguments not mapped to the arguments of the function can
       be normal properties */
    for(i = arg_count; i < argc; i++) {
        if (JS_DefinePropertyValueUint32(ctx, val, i,
                                         JS_DupValue(ctx, argv[i]),
                                         JS_PROP_C_W_E) < 0)
            goto fail;
    }

    JS_DefinePropertyValue(ctx, val, JS_ATOM_Symbol_iterator,
                           JS_DupValue(ctx, ctx->array_proto_values),
                           JS_PROP_CONFIGURABLE | JS_PROP_WRITABLE);
    /* callee returns this function in non strict mode */
    JS_DefinePropertyValue(ctx, val, JS_ATOM_callee,
                           JS_DupValue(ctx, ctx->rt->current_stack_frame->cur_func),
                           JS_PROP_CONFIGURABLE | JS_PROP_WRITABLE);
    return val;
 fail:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static JSValue js_build_rest(JSContext *ctx, int first, int argc, JSValueConst *argv)
{
    JSValue val;
    int i, ret;

    val = JS_NewArray(ctx);
    if (JS_IsException(val))
        return val;
    for (i = first; i < argc; i++) {
        ret = JS_DefinePropertyValueUint32(ctx, val, i - first,
                                           JS_DupValue(ctx, argv[i]),
                                           JS_PROP_C_W_E);
        if (ret < 0) {
            JS_FreeValue(ctx, val);
            return JS_EXCEPTION;
        }
    }
    return val;
}

static JSValue build_for_in_iterator(JSContext *ctx, JSValue obj)
{
    JSObject *p;
    JSPropertyEnum *tab_atom;
    int i;
    JSValue enum_obj, obj1;
    JSForInIterator *it;
    uint32_t tag, tab_atom_count;

    tag = JS_VALUE_GET_TAG(obj);
    if (tag != JS_TAG_OBJECT && tag != JS_TAG_NULL && tag != JS_TAG_UNDEFINED) {
        obj = JS_ToObjectFree(ctx, obj);
    }

    it = (JSForInIterator*) js_malloc(ctx, sizeof(*it));
    if (!it) {
        JS_FreeValue(ctx, obj);
        return JS_EXCEPTION;
    }
    enum_obj = JS_NewObjectProtoClass(ctx, JS_NULL, JS_CLASS_FOR_IN_ITERATOR);
    if (JS_IsException(enum_obj)) {
        js_free(ctx, it);
        JS_FreeValue(ctx, obj);
        return JS_EXCEPTION;
    }
    it->is_array = FALSE;
    it->obj = obj;
    it->idx = 0;
    p = JS_VALUE_GET_OBJ(enum_obj);
    p->u.for_in_iterator = it;

    if (tag == JS_TAG_NULL || tag == JS_TAG_UNDEFINED)
        return enum_obj;

    /* fast path: assume no enumerable properties in the prototype chain */
    obj1 = JS_DupValue(ctx, obj);
    for(;;) {
        obj1 = JS_GetPrototypeFree(ctx, obj1);
        if (JS_IsNull(obj1))
            break;
        if (JS_IsException(obj1))
            goto fail;
        if (JS_GetOwnPropertyNamesInternal(ctx, &tab_atom, &tab_atom_count,
                                           JS_VALUE_GET_OBJ(obj1),
                                           JS_GPN_STRING_MASK | JS_GPN_ENUM_ONLY)) {
            JS_FreeValue(ctx, obj1);
            goto fail;
        }
        js_free_prop_enum(ctx, tab_atom, tab_atom_count);
        if (tab_atom_count != 0) {
            JS_FreeValue(ctx, obj1);
            goto slow_path;
        }
        /* must check for timeout to avoid infinite loop */
        if (js_poll_interrupts(ctx)) {
            JS_FreeValue(ctx, obj1);
            goto fail;
        }
    }

    p = JS_VALUE_GET_OBJ(obj);

    if (p->fast_array) {
        JSShape *sh;
        JSShapeProperty *prs;
        /* check that there are no enumerable normal fields */
        sh = p->shape;
        for(i = 0, prs = get_shape_prop(sh); i < sh->prop_count; i++, prs++) {
            if (prs->flags & JS_PROP_ENUMERABLE)
                goto normal_case;
        }
        /* for fast arrays, we only store the number of elements */
        it->is_array = TRUE;
        it->array_length = p->u.array.count;
    } else {
    normal_case:
        if (JS_GetOwnPropertyNamesInternal(ctx, &tab_atom, &tab_atom_count, p,
                                   JS_GPN_STRING_MASK | JS_GPN_ENUM_ONLY))
            goto fail;
        for(i = 0; i < tab_atom_count; i++) {
            JS_SetPropertyInternal(ctx, enum_obj, tab_atom[i].atom, JS_NULL, 0);
        }
        js_free_prop_enum(ctx, tab_atom, tab_atom_count);
    }
    return enum_obj;

 slow_path:
    /* non enumerable properties hide the enumerables ones in the
       prototype chain */
    obj1 = JS_DupValue(ctx, obj);
    for(;;) {
        if (JS_GetOwnPropertyNamesInternal(ctx, &tab_atom, &tab_atom_count,
                                           JS_VALUE_GET_OBJ(obj1),
                                           JS_GPN_STRING_MASK | JS_GPN_SET_ENUM)) {
            JS_FreeValue(ctx, obj1);
            goto fail;
        }
        for(i = 0; i < tab_atom_count; i++) {
            JS_DefinePropertyValue(ctx, enum_obj, tab_atom[i].atom, JS_NULL,
                                   (tab_atom[i].is_enumerable ?
                                    JS_PROP_ENUMERABLE : 0));
        }
        js_free_prop_enum(ctx, tab_atom, tab_atom_count);
        obj1 = JS_GetPrototypeFree(ctx, obj1);
        if (JS_IsNull(obj1))
            break;
        if (JS_IsException(obj1))
            goto fail;
        /* must check for timeout to avoid infinite loop */
        if (js_poll_interrupts(ctx)) {
            JS_FreeValue(ctx, obj1);
            goto fail;
        }
    }
    return enum_obj;

 fail:
    JS_FreeValue(ctx, enum_obj);
    return JS_EXCEPTION;
}

/* obj -> enum_obj */
[[nodiscard]] static int js_for_in_start(JSContext *ctx, JSValue *sp)
{
    sp[-1] = build_for_in_iterator(ctx, sp[-1]);
    if (JS_IsException(sp[-1]))
        return -1;
    return 0;
}

/* enum_obj -> enum_obj value done */
[[nodiscard]] static int js_for_in_next(JSContext *ctx, JSValue *sp)
{
    JSValueConst enum_obj;
    JSObject *p;
    JSAtom prop;
    JSForInIterator *it;
    int ret;

    enum_obj = sp[-1];
    /* fail safe */
    if (JS_VALUE_GET_TAG(enum_obj) != JS_TAG_OBJECT)
        goto done;
    p = JS_VALUE_GET_OBJ(enum_obj);
    if (p->class_id != JS_CLASS_FOR_IN_ITERATOR)
        goto done;
    it = p->u.for_in_iterator;

    for(;;) {
        if (it->is_array) {
            if (it->idx >= it->array_length)
                goto done;
            prop = __JS_AtomFromUInt32(it->idx);
            it->idx++;
        } else {
            JSShape *sh = p->shape;
            JSShapeProperty *prs;
            if (it->idx >= sh->prop_count)
                goto done;
            prs = get_shape_prop(sh) + it->idx;
            prop = prs->atom;
            it->idx++;
            if (prop == JS_ATOM_NULL || !(prs->flags & JS_PROP_ENUMERABLE))
                continue;
        }
        /* check if the property was deleted */
        ret = JS_HasProperty(ctx, it->obj, prop);
        if (ret < 0)
            return ret;
        if (ret)
            break;
    }
    /* return the property */
    sp[0] = JS_AtomToValue(ctx, prop);
    sp[1] = JS_FALSE;
    return 0;
 done:
    /* return the end */
    sp[0] = JS_UNDEFINED;
    sp[1] = JS_TRUE;
    return 0;
}

static JSValue JS_GetIterator2(JSContext *ctx, JSValueConst obj,
                               JSValueConst method)
{
    JSValue enum_obj;

    enum_obj = JS_Call(ctx, method, obj, 0, NULL);
    if (JS_IsException(enum_obj))
        return enum_obj;
    if (!JS_IsObject(enum_obj)) {
        JS_FreeValue(ctx, enum_obj);
        return JS_ThrowTypeErrorNotAnObject(ctx);
    }
    return enum_obj;
}

static JSValue JS_GetIterator(JSContext *ctx, JSValueConst obj, BOOL is_async)
{
    JSValue method, ret, sync_iter;

    if (is_async) {
        method = JS_GetProperty(ctx, obj, JS_ATOM_Symbol_asyncIterator);
        if (JS_IsException(method))
            return method;
        if (JS_IsUndefined(method) || JS_IsNull(method)) {
            method = JS_GetProperty(ctx, obj, JS_ATOM_Symbol_iterator);
            if (JS_IsException(method))
                return method;
            sync_iter = JS_GetIterator2(ctx, obj, method);
            JS_FreeValue(ctx, method);
            if (JS_IsException(sync_iter))
                return sync_iter;
            ret = JS_CreateAsyncFromSyncIterator(ctx, sync_iter);
            JS_FreeValue(ctx, sync_iter);
            return ret;
        }
    } else {
        method = JS_GetProperty(ctx, obj, JS_ATOM_Symbol_iterator);
        if (JS_IsException(method))
            return method;
    }
    if (!JS_IsFunction(ctx, method)) {
        JS_FreeValue(ctx, method);
        return JS_ThrowTypeError(ctx, "value is not iterable");
    }
    ret = JS_GetIterator2(ctx, obj, method);
    JS_FreeValue(ctx, method);
    return ret;
}

/* return *pdone = 2 if the iterator object is not parsed */
static JSValue JS_IteratorNext2(JSContext *ctx, JSValueConst enum_obj,
                                JSValueConst method,
                                int argc, JSValueConst *argv, int *pdone)
{
    JSValue obj;

    /* fast path for the built-in iterators (avoid creating the
       intermediate result object) */
    if (JS_IsObject(method)) {
        JSObject *p = JS_VALUE_GET_OBJ(method);
        if (p->class_id == JS_CLASS_C_FUNCTION &&
            p->u.cfunc.cproto == JS_CFUNC_iterator_next) {
            JSCFunctionType func;
            JSValueConst args[1];

            /* in case the function expects one argument */
            if (argc == 0) {
                args[0] = JS_UNDEFINED;
                argv = args;
            }
            func = p->u.cfunc.c_function;
            return func.iterator_next(ctx, enum_obj, argc, argv,
                                      pdone, p->u.cfunc.magic);
        }
    }
    obj = JS_Call(ctx, method, enum_obj, argc, argv);
    if (JS_IsException(obj))
        goto fail;
    if (!JS_IsObject(obj)) {
        JS_FreeValue(ctx, obj);
        JS_ThrowTypeError(ctx, "iterator must return an object");
        goto fail;
    }
    *pdone = 2;
    return obj;
 fail:
    *pdone = FALSE;
    return JS_EXCEPTION;
}

static JSValue JS_IteratorNext(JSContext *ctx, JSValueConst enum_obj,
                               JSValueConst method,
                               int argc, JSValueConst *argv, BOOL *pdone)
{
    JSValue obj, value, done_val;
    int done;

    obj = JS_IteratorNext2(ctx, enum_obj, method, argc, argv, &done);
    if (JS_IsException(obj))
        goto fail;
    if (done != 2) {
        *pdone = done;
        return obj;
    } else {
        done_val = JS_GetProperty(ctx, obj, JS_ATOM_done);
        if (JS_IsException(done_val))
            goto fail;
        *pdone = JS_ToBoolFree(ctx, done_val);
        value = JS_UNDEFINED;
        if (!*pdone) {
            value = JS_GetProperty(ctx, obj, JS_ATOM_value);
        }
        JS_FreeValue(ctx, obj);
        return value;
    }
 fail:
    JS_FreeValue(ctx, obj);
    *pdone = FALSE;
    return JS_EXCEPTION;
}

/* return < 0 in case of exception */
static int JS_IteratorClose(JSContext *ctx, JSValueConst enum_obj,
                            BOOL is_exception_pending)
{
    JSValue method, ret, ex_obj;
    int res;

    if (is_exception_pending) {
        ex_obj = ctx->rt->current_exception;
        ctx->rt->current_exception = JS_NULL;
        res = -1;
    } else {
        ex_obj = JS_UNDEFINED;
        res = 0;
    }
    method = JS_GetProperty(ctx, enum_obj, JS_ATOM_return);
    if (JS_IsException(method)) {
        res = -1;
        goto done;
    }
    if (JS_IsUndefined(method) || JS_IsNull(method)) {
        goto done;
    }
    ret = JS_CallFree(ctx, method, enum_obj, 0, NULL);
    if (!is_exception_pending) {
        if (JS_IsException(ret)) {
            res = -1;
        } else if (!JS_IsObject(ret)) {
            JS_ThrowTypeErrorNotAnObject(ctx);
            res = -1;
        }
    }
    JS_FreeValue(ctx, ret);
 done:
    if (is_exception_pending) {
        JS_Throw(ctx, ex_obj);
    }
    return res;
}

/* obj -> enum_rec (3 slots) */
[[nodiscard]] static int js_for_of_start(JSContext *ctx, JSValue *sp,
                                       BOOL is_async)
{
    JSValue op1, obj, method;
    op1 = sp[-1];
    obj = JS_GetIterator(ctx, op1, is_async);
    if (JS_IsException(obj))
        return -1;
    JS_FreeValue(ctx, op1);
    sp[-1] = obj;
    method = JS_GetProperty(ctx, obj, JS_ATOM_next);
    if (JS_IsException(method))
        return -1;
    sp[0] = method;
    return 0;
}

/* enum_rec [objs] -> enum_rec [objs] value done. There are 'offset'
   objs. If 'done' is true or in case of exception, 'enum_rec' is set
   to undefined. If 'done' is true, 'value' is always set to
   undefined. */
[[nodiscard]] static int js_for_of_next(JSContext *ctx, JSValue *sp, int offset)
{
    JSValue value = JS_UNDEFINED;
    int done = 1;

    if (js_likely(!JS_IsUndefined(sp[offset]))) {
        value = JS_IteratorNext(ctx, sp[offset], sp[offset + 1], 0, NULL, &done);
        if (JS_IsException(value))
            done = -1;
        if (done) {
            /* value is JS_UNDEFINED or JS_EXCEPTION */
            /* replace the iteration object with undefined */
            JS_FreeValue(ctx, sp[offset]);
            sp[offset] = JS_UNDEFINED;
            if (done < 0) {
                return -1;
            } else {
                JS_FreeValue(ctx, value);
                value = JS_UNDEFINED;
            }
        }
    }
    sp[0] = value;
    sp[1] = JS_NewBool(ctx, done);
    return 0;
}

static JSValue JS_IteratorGetCompleteValue(JSContext *ctx, JSValueConst obj,
                                           BOOL *pdone)
{
    JSValue done_val, value;
    BOOL done;
    done_val = JS_GetProperty(ctx, obj, JS_ATOM_done);
    if (JS_IsException(done_val))
        goto fail;
    done = JS_ToBoolFree(ctx, done_val);
    value = JS_GetProperty(ctx, obj, JS_ATOM_value);
    if (JS_IsException(value))
        goto fail;
    *pdone = done;
    return value;
 fail:
    *pdone = FALSE;
    return JS_EXCEPTION;
}

[[nodiscard]] static int js_iterator_get_value_done(JSContext *ctx, JSValue *sp)
{
    JSValue obj, value;
    BOOL done;
    obj = sp[-1];
    if (!JS_IsObject(obj)) {
        JS_ThrowTypeError(ctx, "iterator must return an object");
        return -1;
    }
    value = JS_IteratorGetCompleteValue(ctx, obj, &done);
    if (JS_IsException(value))
        return -1;
    JS_FreeValue(ctx, obj);
    sp[-1] = value;
    sp[0] = JS_NewBool(ctx, done);
    return 0;
}

static JSValue js_create_iterator_result(JSContext *ctx,
                                         JSValue val,
                                         BOOL done)
{
    JSValue obj;
    obj = JS_NewObject(ctx);
    if (JS_IsException(obj)) {
        JS_FreeValue(ctx, val);
        return obj;
    }
    if (JS_DefinePropertyValue(ctx, obj, JS_ATOM_value,
                               val, JS_PROP_C_W_E) < 0) {
        goto fail;
    }
    if (JS_DefinePropertyValue(ctx, obj, JS_ATOM_done,
                               JS_NewBool(ctx, done), JS_PROP_C_W_E) < 0) {
    fail:
        JS_FreeValue(ctx, obj);
        return JS_EXCEPTION;
    }
    return obj;
}

static JSValue js_array_iterator_next(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv,
                                      BOOL *pdone, int magic);

static JSValue js_create_array_iterator(JSContext *ctx, JSValueConst this_val,
                                        int argc, JSValueConst *argv, int magic);

static BOOL js_is_fast_array(JSContext *ctx, JSValueConst obj)
{
    /* Try and handle fast arrays explicitly */
    if (JS_VALUE_GET_TAG(obj) == JS_TAG_OBJECT) {
        JSObject *p = JS_VALUE_GET_OBJ(obj);
        if (p->class_id == JS_CLASS_ARRAY && p->fast_array) {
            return TRUE;
        }
    }
    return FALSE;
}

/* Access an Array's internal JSValue array if available */
static BOOL js_get_fast_array(JSContext *ctx, JSValueConst obj,
                              JSValue **arrpp, uint32_t *countp)
{
    /* Try and handle fast arrays explicitly */
    if (JS_VALUE_GET_TAG(obj) == JS_TAG_OBJECT) {
        JSObject *p = JS_VALUE_GET_OBJ(obj);
        if (p->class_id == JS_CLASS_ARRAY && p->fast_array) {
            *countp = p->u.array.count;
            *arrpp = p->u.array.u.values;
            return TRUE;
        }
    }
    return FALSE;
}

[[nodiscard]] static int js_append_enumerate(JSContext *ctx, JSValue *sp)
{
    JSValue iterator, enumobj, method, value;
    int is_array_iterator;
    JSValue *arrp;
    uint32_t i, count32, pos;

    if (JS_VALUE_GET_TAG(sp[-2]) != JS_TAG_INT) {
        JS_ThrowInternalError(ctx, "invalid index for append");
        return -1;
    }

    pos = JS_VALUE_GET_INT(sp[-2]);

    /* XXX: further optimisations:
       - use ctx->array_proto_values?
       - check if array_iterator_prototype next method is built-in and
         avoid constructing actual iterator object?
       - build this into js_for_of_start and use in all `for (x of o)` loops
     */
    iterator = JS_GetProperty(ctx, sp[-1], JS_ATOM_Symbol_iterator);
    if (JS_IsException(iterator))
        return -1;
    is_array_iterator = JS_IsCFunction(ctx, iterator,
                                       (JSCFunction *)js_create_array_iterator,
                                       JS_ITERATOR_KIND_VALUE);
    JS_FreeValue(ctx, iterator);

    enumobj = JS_GetIterator(ctx, sp[-1], FALSE);
    if (JS_IsException(enumobj))
        return -1;
    method = JS_GetProperty(ctx, enumobj, JS_ATOM_next);
    if (JS_IsException(method)) {
        JS_FreeValue(ctx, enumobj);
        return -1;
    }
    if (is_array_iterator
    &&  JS_IsCFunction(ctx, method, (JSCFunction *)js_array_iterator_next, 0)
    &&  js_get_fast_array(ctx, sp[-1], &arrp, &count32)) {
        uint32_t len;
        if (js_get_length32(ctx, &len, sp[-1]))
            goto exception;
        /* if len > count32, the elements >= count32 might be read in
           the prototypes and might have side effects */
        if (len != count32)
            goto general_case;
        /* Handle fast arrays explicitly */
        for (i = 0; i < count32; i++) {
            if (JS_DefinePropertyValueUint32(ctx, sp[-3], pos++,
                                             JS_DupValue(ctx, arrp[i]), JS_PROP_C_W_E) < 0)
                goto exception;
        }
    } else {
    general_case:
        for (;;) {
            BOOL done;
            value = JS_IteratorNext(ctx, enumobj, method, 0, NULL, &done);
            if (JS_IsException(value))
                goto exception;
            if (done) {
                /* value is JS_UNDEFINED */
                break;
            }
            if (JS_DefinePropertyValueUint32(ctx, sp[-3], pos++, value, JS_PROP_C_W_E) < 0)
                goto exception;
        }
    }
    /* Note: could raise an error if too many elements */
    sp[-2] = JS_NewInt32(ctx, pos);
    JS_FreeValue(ctx, enumobj);
    JS_FreeValue(ctx, method);
    return 0;

exception:
    JS_IteratorClose(ctx, enumobj, TRUE);
    JS_FreeValue(ctx, enumobj);
    JS_FreeValue(ctx, method);
    return -1;
}

[[nodiscard]] static int JS_CopyDataProperties(JSContext *ctx,
                                             JSValueConst target,
                                             JSValueConst source,
                                             JSValueConst excluded,
                                             BOOL setprop)
{
    JSPropertyEnum *tab_atom;
    JSValue val;
    uint32_t i, tab_atom_count;
    JSObject *p;
    JSObject *pexcl = NULL;
    int ret, gpn_flags;
    JSPropertyDescriptor desc;
    BOOL is_enumerable;

    if (JS_VALUE_GET_TAG(source) != JS_TAG_OBJECT)
        return 0;

    if (JS_VALUE_GET_TAG(excluded) == JS_TAG_OBJECT)
        pexcl = JS_VALUE_GET_OBJ(excluded);

    p = JS_VALUE_GET_OBJ(source);

    gpn_flags = JS_GPN_STRING_MASK | JS_GPN_SYMBOL_MASK | JS_GPN_ENUM_ONLY;
    if (p->is_exotic) {
        const JSClassExoticMethods *em = ctx->rt->class_array[p->class_id].exotic;
        /* cannot use JS_GPN_ENUM_ONLY with e.g. proxies because it
           introduces a visible change */
        if (em && em->get_own_property_names) {
            gpn_flags &= ~JS_GPN_ENUM_ONLY;
        }
    }
    if (JS_GetOwnPropertyNamesInternal(ctx, &tab_atom, &tab_atom_count, p,
                                       gpn_flags))
        return -1;

    for (i = 0; i < tab_atom_count; i++) {
        if (pexcl) {
            ret = JS_GetOwnPropertyInternal(ctx, NULL, pexcl, tab_atom[i].atom);
            if (ret) {
                if (ret < 0)
                    goto exception;
                continue;
            }
        }
        if (!(gpn_flags & JS_GPN_ENUM_ONLY)) {
            /* test if the property is enumerable */
            ret = JS_GetOwnPropertyInternal(ctx, &desc, p, tab_atom[i].atom);
            if (ret < 0)
                goto exception;
            if (!ret)
                continue;
            is_enumerable = (desc.flags & JS_PROP_ENUMERABLE) != 0;
            js_free_desc(ctx, &desc);
            if (!is_enumerable)
                continue;
        }
        val = JS_GetProperty(ctx, source, tab_atom[i].atom);
        if (JS_IsException(val))
            goto exception;
        if (setprop)
            ret = JS_SetProperty(ctx, target, tab_atom[i].atom, val);
        else
            ret = JS_DefinePropertyValue(ctx, target, tab_atom[i].atom, val,
                                         JS_PROP_C_W_E);
        if (ret < 0)
            goto exception;
    }
    js_free_prop_enum(ctx, tab_atom, tab_atom_count);
    return 0;
 exception:
    js_free_prop_enum(ctx, tab_atom, tab_atom_count);
    return -1;
}

/* only valid inside C functions */
static JSValueConst JS_GetActiveFunction(JSContext *ctx)
{
    return ctx->rt->current_stack_frame->cur_func;
}

static JSVarRef *get_var_ref(JSContext *ctx, JSStackFrame *sf,
                             int var_idx, BOOL is_arg)
{
    JSVarRef *var_ref;
    struct list_head *el;

    list_for_each(el, &sf->var_ref_list) {
        var_ref = list_entry(el, JSVarRef, header.link);
        if (var_ref->var_idx == var_idx && var_ref->is_arg == is_arg) {
            var_ref->header.ref_count++;
            return var_ref;
        }
    }
    /* create a new one */
    var_ref = (JSVarRef*) js_malloc(ctx, sizeof(JSVarRef));
    if (!var_ref)
        return NULL;
    var_ref->header.ref_count = 1;
    var_ref->is_detached = FALSE;
    var_ref->is_arg = is_arg;
    var_ref->var_idx = var_idx;
    list_add_tail(&var_ref->header.link, &sf->var_ref_list);
    if (is_arg)
        var_ref->pvalue = &sf->arg_buf[var_idx];
    else
        var_ref->pvalue = &sf->var_buf[var_idx];
    var_ref->value = JS_UNDEFINED;
    return var_ref;
}

static JSValue js_closure2(JSContext *ctx, JSValue func_obj,
                           JSFunctionBytecode *b,
                           JSVarRef **cur_var_refs,
                           JSStackFrame *sf)
{
    JSObject *p;
    JSVarRef **var_refs;
    int i;

    p = JS_VALUE_GET_OBJ(func_obj);
    p->u.func.function_bytecode = b;
    p->u.func.home_object = NULL;
    p->u.func.var_refs = NULL;
    if (b->closure_var_count) {
        var_refs = (JSVarRef**) js_mallocz(ctx, sizeof(var_refs[0]) * b->closure_var_count);
        if (!var_refs)
            goto fail;
        p->u.func.var_refs = var_refs;
        for(i = 0; i < b->closure_var_count; i++) {
            JSClosureVar *cv = &b->closure_var[i];
            JSVarRef *var_ref;
            if (cv->is_local) {
                /* reuse the existing variable reference if it already exists */
                var_ref = get_var_ref(ctx, sf, cv->var_idx, cv->is_arg);
                if (!var_ref)
                    goto fail;
            } else {
                var_ref = cur_var_refs[cv->var_idx];
                var_ref->header.ref_count++;
            }
            var_refs[i] = var_ref;
        }
    }
    return func_obj;
 fail:
    /* bfunc is freed when func_obj is freed */
    JS_FreeValue(ctx, func_obj);
    return JS_EXCEPTION;
}

static JSValue js_instantiate_prototype(JSContext *ctx, JSObject *p, JSAtom atom, void *opaque)
{
    JSValue obj, this_val;
    int ret;

    this_val = JS_MKPTR(JS_TAG_OBJECT, p);
    obj = JS_NewObject(ctx);
    if (JS_IsException(obj))
        return JS_EXCEPTION;
    set_cycle_flag(ctx, obj);
    set_cycle_flag(ctx, this_val);
    ret = JS_DefinePropertyValue(ctx, obj, JS_ATOM_constructor,
                                 JS_DupValue(ctx, this_val),
                                 JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
    if (ret < 0) {
        JS_FreeValue(ctx, obj);
        return JS_EXCEPTION;
    }
    return obj;
}

static uint16_t func_kind_to_class_id (int kind)
{
    switch (kind)
    {
        case JS_FUNC_NORMAL:          return JS_CLASS_BYTECODE_FUNCTION;
        case JS_FUNC_GENERATOR:       return JS_CLASS_GENERATOR_FUNCTION;
        case JS_FUNC_ASYNC:           return JS_CLASS_ASYNC_FUNCTION;
        case JS_FUNC_ASYNC_GENERATOR: return JS_CLASS_ASYNC_GENERATOR_FUNCTION;
        default:                      assert (false); return 0;
    }
};

static JSValue js_closure(JSContext *ctx, JSValue bfunc,
                          JSVarRef **cur_var_refs,
                          JSStackFrame *sf)
{
    JSValue func_obj;
    JSAtom name_atom;

    auto b = (JSFunctionBytecode*) JS_VALUE_GET_PTR(bfunc);
    func_obj = JS_NewObjectClass(ctx, func_kind_to_class_id (b->func_kind));
    if (JS_IsException(func_obj)) {
        JS_FreeValue(ctx, bfunc);
        return JS_EXCEPTION;
    }
    func_obj = js_closure2(ctx, func_obj, b, cur_var_refs, sf);
    if (JS_IsException(func_obj)) {
        /* bfunc has been freed */
        goto fail;
    }
    name_atom = b->func_name;
    if (name_atom == JS_ATOM_NULL)
        name_atom = JS_ATOM_empty_string;
    js_function_set_properties(ctx, func_obj, name_atom,
                               b->defined_arg_count);

    if (b->func_kind & JS_FUNC_GENERATOR) {
        JSValue proto;
        int proto_class_id;
        /* generators have a prototype field which is used as
           prototype for the generator object */
        if (b->func_kind == JS_FUNC_ASYNC_GENERATOR)
            proto_class_id = JS_CLASS_ASYNC_GENERATOR;
        else
            proto_class_id = JS_CLASS_GENERATOR;
        proto = JS_NewObjectProto(ctx, ctx->class_proto[proto_class_id]);
        if (JS_IsException(proto))
            goto fail;
        JS_DefinePropertyValue(ctx, func_obj, JS_ATOM_prototype, proto,
                               JS_PROP_WRITABLE);
    } else if (b->has_prototype) {
        /* add the 'prototype' property: delay instantiation to avoid
           creating cycles for every javascript function. The prototype
           object is created on the fly when first accessed */
        JS_SetConstructorBit(ctx, func_obj, TRUE);
        JS_DefineAutoInitProperty(ctx, func_obj, JS_ATOM_prototype,
                                  JS_AUTOINIT_ID_PROTOTYPE, NULL,
                                  JS_PROP_WRITABLE);
    }
    return func_obj;
 fail:
    /* bfunc is freed when func_obj is freed */
    JS_FreeValue(ctx, func_obj);
    return JS_EXCEPTION;
}

#define JS_DEFINE_CLASS_HAS_HERITAGE     (1 << 0)

static int js_op_define_class(JSContext *ctx, JSValue *sp,
                              JSAtom class_name, int class_flags,
                              JSVarRef **cur_var_refs,
                              JSStackFrame *sf, BOOL is_computed_name)
{
    JSValue bfunc, parent_class, proto = JS_UNDEFINED;
    JSValue ctor = JS_UNDEFINED, parent_proto = JS_UNDEFINED;
    JSFunctionBytecode *b;

    parent_class = sp[-2];
    bfunc = sp[-1];

    if (class_flags & JS_DEFINE_CLASS_HAS_HERITAGE) {
        if (JS_IsNull(parent_class)) {
            parent_proto = JS_NULL;
            parent_class = JS_DupValue(ctx, ctx->function_proto);
        } else {
            if (!JS_IsConstructor(ctx, parent_class)) {
                JS_ThrowTypeError(ctx, "parent class must be constructor");
                goto fail;
            }
            parent_proto = JS_GetProperty(ctx, parent_class, JS_ATOM_prototype);
            if (JS_IsException(parent_proto))
                goto fail;
            if (!JS_IsNull(parent_proto) && !JS_IsObject(parent_proto)) {
                JS_ThrowTypeError(ctx, "parent prototype must be an object or null");
                goto fail;
            }
        }
    } else {
        /* parent_class is JS_UNDEFINED in this case */
        parent_proto = JS_DupValue(ctx, ctx->class_proto[JS_CLASS_OBJECT]);
        parent_class = JS_DupValue(ctx, ctx->function_proto);
    }
    proto = JS_NewObjectProto(ctx, parent_proto);
    if (JS_IsException(proto))
        goto fail;

    b = (JSFunctionBytecode*) JS_VALUE_GET_PTR(bfunc);
    assert(b->func_kind == JS_FUNC_NORMAL);
    ctor = JS_NewObjectProtoClass(ctx, parent_class,
                                  JS_CLASS_BYTECODE_FUNCTION);
    if (JS_IsException(ctor))
        goto fail;
    ctor = js_closure2(ctx, ctor, b, cur_var_refs, sf);
    bfunc = JS_UNDEFINED;
    if (JS_IsException(ctor))
        goto fail;
    js_method_set_home_object(ctx, ctor, proto);
    JS_SetConstructorBit(ctx, ctor, TRUE);

    JS_DefinePropertyValue(ctx, ctor, JS_ATOM_length,
                           JS_NewInt32(ctx, b->defined_arg_count),
                           JS_PROP_CONFIGURABLE);

    if (is_computed_name) {
        if (JS_DefineObjectNameComputed(ctx, ctor, sp[-3],
                                        JS_PROP_CONFIGURABLE) < 0)
            goto fail;
    } else {
        if (JS_DefineObjectName(ctx, ctor, class_name, JS_PROP_CONFIGURABLE) < 0)
            goto fail;
    }

    /* the constructor property must be first. It can be overriden by
       computed property names */
    if (JS_DefinePropertyValue(ctx, proto, JS_ATOM_constructor,
                               JS_DupValue(ctx, ctor),
                               JS_PROP_CONFIGURABLE |
                               JS_PROP_WRITABLE | JS_PROP_THROW) < 0)
        goto fail;
    /* set the prototype property */
    if (JS_DefinePropertyValue(ctx, ctor, JS_ATOM_prototype,
                               JS_DupValue(ctx, proto), JS_PROP_THROW) < 0)
        goto fail;
    set_cycle_flag(ctx, ctor);
    set_cycle_flag(ctx, proto);

    JS_FreeValue(ctx, parent_proto);
    JS_FreeValue(ctx, parent_class);

    sp[-2] = ctor;
    sp[-1] = proto;
    return 0;
 fail:
    JS_FreeValue(ctx, parent_class);
    JS_FreeValue(ctx, parent_proto);
    JS_FreeValue(ctx, bfunc);
    JS_FreeValue(ctx, proto);
    JS_FreeValue(ctx, ctor);
    sp[-2] = JS_UNDEFINED;
    sp[-1] = JS_UNDEFINED;
    return -1;
}

static void close_var_refs(JSRuntime *rt, JSStackFrame *sf)
{
    struct list_head *el, *el1;
    JSVarRef *var_ref;
    int var_idx;

    list_for_each_safe(el, el1, &sf->var_ref_list) {
        var_ref = list_entry(el, JSVarRef, header.link);
        var_idx = var_ref->var_idx;
        if (var_ref->is_arg)
            var_ref->value = JS_DupValueRT(rt, sf->arg_buf[var_idx]);
        else
            var_ref->value = JS_DupValueRT(rt, sf->var_buf[var_idx]);
        var_ref->pvalue = &var_ref->value;
        /* the reference is no longer to a local variable */
        var_ref->is_detached = TRUE;
        add_gc_object(rt, &var_ref->header, JS_GC_OBJ_TYPE_VAR_REF);
    }
}

static void close_lexical_var(JSContext *ctx, JSStackFrame *sf, int idx, int is_arg)
{
    struct list_head *el, *el1;
    JSVarRef *var_ref;
    int var_idx = idx;

    list_for_each_safe(el, el1, &sf->var_ref_list) {
        var_ref = list_entry(el, JSVarRef, header.link);
        if (var_idx == var_ref->var_idx && var_ref->is_arg == is_arg) {
            var_ref->value = JS_DupValue(ctx, sf->var_buf[var_idx]);
            var_ref->pvalue = &var_ref->value;
            list_del(&var_ref->header.link);
            /* the reference is no longer to a local variable */
            var_ref->is_detached = TRUE;
            add_gc_object(ctx->rt, &var_ref->header, JS_GC_OBJ_TYPE_VAR_REF);
        }
    }
}

#define JS_CALL_FLAG_COPY_ARGV   (1 << 1)
#define JS_CALL_FLAG_GENERATOR   (1 << 2)

static JSValue js_call_c_function(JSContext *ctx, JSValueConst func_obj,
                                  JSValueConst this_obj,
                                  int argc, JSValueConst *argv, int flags)
{
    JSRuntime *rt = ctx->rt;
    JSCFunctionType func;
    JSObject *p;
    JSStackFrame sf_s, *sf = &sf_s, *prev_sf;
    JSValue ret_val;
    JSValueConst *arg_buf;
    int arg_count, i;
    JSCFunctionEnum cproto;

    p = JS_VALUE_GET_OBJ(func_obj);
    cproto = (JSCFunctionEnum) p->u.cfunc.cproto;
    arg_count = p->u.cfunc.length;

    /* better to always check stack overflow */
    if (js_check_stack_overflow(rt, sizeof(arg_buf[0]) * arg_count))
        return JS_ThrowStackOverflow(ctx);

    prev_sf = rt->current_stack_frame;
    sf->prev_frame = prev_sf;
    rt->current_stack_frame = sf;
    ctx = p->u.cfunc.realm; /* change the current realm */

#ifdef CONFIG_BIGNUM
    /* we only propagate the bignum mode as some runtime functions
       test it */
    if (prev_sf)
        sf->js_mode = prev_sf->js_mode & JS_MODE_MATH;
    else
        sf->js_mode = 0;
#else
    sf->js_mode = 0;
#endif
    sf->cur_func = (JSValue)func_obj;
    sf->arg_count = argc;
    arg_buf = argv;

    if (js_unlikely(argc < arg_count)) {
        /* ensure that at least argc_count arguments are readable */
        arg_buf = (JSValue*) alloca(sizeof(arg_buf[0]) * arg_count);
        for(i = 0; i < argc; i++)
            arg_buf[i] = argv[i];
        for(i = argc; i < arg_count; i++)
            arg_buf[i] = JS_UNDEFINED;
        sf->arg_count = arg_count;
    }
    sf->arg_buf = (JSValue*)arg_buf;

    func = p->u.cfunc.c_function;
    switch(cproto) {
    case JS_CFUNC_constructor:
    case JS_CFUNC_constructor_or_func:
        if (!(flags & JS_CALL_FLAG_CONSTRUCTOR)) {
            if (cproto == JS_CFUNC_constructor) {
            not_a_constructor:
                ret_val = JS_ThrowTypeError(ctx, "must be called with new");
                break;
            } else {
                this_obj = JS_UNDEFINED;
            }
        }
        /* here this_obj is new_target */
        /* fall thru */
    case JS_CFUNC_generic:
        ret_val = func.generic(ctx, this_obj, argc, arg_buf);
        break;
    case JS_CFUNC_constructor_magic:
    case JS_CFUNC_constructor_or_func_magic:
        if (!(flags & JS_CALL_FLAG_CONSTRUCTOR)) {
            if (cproto == JS_CFUNC_constructor_magic) {
                goto not_a_constructor;
            } else {
                this_obj = JS_UNDEFINED;
            }
        }
        /* fall thru */
    case JS_CFUNC_generic_magic:
        ret_val = func.generic_magic(ctx, this_obj, argc, arg_buf,
                                     p->u.cfunc.magic);
        break;
    case JS_CFUNC_getter:
        ret_val = func.getter(ctx, this_obj);
        break;
    case JS_CFUNC_setter:
        ret_val = func.setter(ctx, this_obj, arg_buf[0]);
        break;
    case JS_CFUNC_getter_magic:
        ret_val = func.getter_magic(ctx, this_obj, p->u.cfunc.magic);
        break;
    case JS_CFUNC_setter_magic:
        ret_val = func.setter_magic(ctx, this_obj, arg_buf[0], p->u.cfunc.magic);
        break;
    case JS_CFUNC_f_f:
        {
            double d1;

            if (js_unlikely(JS_ToFloat64(ctx, &d1, arg_buf[0]))) {
                ret_val = JS_EXCEPTION;
                break;
            }
            ret_val = JS_NewFloat64(ctx, func.f_f(d1));
        }
        break;
    case JS_CFUNC_f_f_f:
        {
            double d1, d2;

            if (js_unlikely(JS_ToFloat64(ctx, &d1, arg_buf[0]))) {
                ret_val = JS_EXCEPTION;
                break;
            }
            if (js_unlikely(JS_ToFloat64(ctx, &d2, arg_buf[1]))) {
                ret_val = JS_EXCEPTION;
                break;
            }
            ret_val = JS_NewFloat64(ctx, func.f_f_f(d1, d2));
        }
        break;
    case JS_CFUNC_iterator_next:
        {
            int done;
            ret_val = func.iterator_next(ctx, this_obj, argc, arg_buf,
                                         &done, p->u.cfunc.magic);
            if (!JS_IsException(ret_val) && done != 2) {
                ret_val = js_create_iterator_result(ctx, ret_val, done);
            }
        }
        break;
    default:
        abort();
    }

    rt->current_stack_frame = sf->prev_frame;
    return ret_val;
}

static JSValue js_call_bound_function(JSContext *ctx, JSValueConst func_obj,
                                      JSValueConst this_obj,
                                      int argc, JSValueConst *argv, int flags)
{
    JSObject *p;
    JSBoundFunction *bf;
    JSValueConst *arg_buf, new_target;
    int arg_count, i;

    p = JS_VALUE_GET_OBJ(func_obj);
    bf = p->u.bound_function;
    arg_count = bf->argc + argc;
    if (js_check_stack_overflow(ctx->rt, sizeof(JSValue) * arg_count))
        return JS_ThrowStackOverflow(ctx);
    arg_buf = (JSValue*) alloca(sizeof(JSValue) * arg_count);
    for(i = 0; i < bf->argc; i++) {
        arg_buf[i] = bf->argv[i];
    }
    for(i = 0; i < argc; i++) {
        arg_buf[bf->argc + i] = argv[i];
    }
    if (flags & JS_CALL_FLAG_CONSTRUCTOR) {
        new_target = this_obj;
        if (js_same_value(ctx, func_obj, new_target))
            new_target = bf->func_obj;
        return JS_CallConstructor2(ctx, bf->func_obj, new_target,
                                   arg_count, arg_buf);
    } else {
        return JS_Call(ctx, bf->func_obj, bf->this_val,
                       arg_count, arg_buf);
    }
}

/* argument of OP_special_object */
typedef enum {
    OP_SPECIAL_OBJECT_ARGUMENTS,
    OP_SPECIAL_OBJECT_MAPPED_ARGUMENTS,
    OP_SPECIAL_OBJECT_THIS_FUNC,
    OP_SPECIAL_OBJECT_NEW_TARGET,
    OP_SPECIAL_OBJECT_HOME_OBJECT,
    OP_SPECIAL_OBJECT_VAR_OBJECT,
    OP_SPECIAL_OBJECT_IMPORT_META,
} OPSpecialObjectEnum;

#define FUNC_RET_AWAIT      0
#define FUNC_RET_YIELD      1
#define FUNC_RET_YIELD_STAR 2

/* argv[] is modified if (flags & JS_CALL_FLAG_COPY_ARGV) = 0. */
static JSValue JS_CallInternal(JSContext *caller_ctx, JSValueConst func_obj,
                               JSValueConst this_obj, JSValueConst new_target,
                               int argc, JSValue *argv, int flags)
{
    JSRuntime *rt = caller_ctx->rt;
    JSContext *ctx;
    JSObject *p;
    JSFunctionBytecode *b;
    JSStackFrame sf_s, *sf = &sf_s;
    const uint8_t *pc;
    OPCodeEnum opcode;
    int arg_allocated_size, i;
    JSValue *local_buf, *stack_buf, *var_buf, *arg_buf, *sp, ret_val, *pval;
    JSVarRef **var_refs;
    size_t alloca_size;

#if !DIRECT_DISPATCH
#define SWITCH(pc)      switch (opcode = (OPCodeEnum) *pc++)
#define CASE(op)        case op
#define DEFAULT         default
#define BREAK           break
#else
    static const void * const dispatch_table[256] = {
#define FMT(f)
#define DEF(id, size, n_pop, n_push, f) && case_OP_ ## id,
#if SHORT_OPCODES
#define def(id, size, n_pop, n_push, f)
#else
#define def(id, size, n_pop, n_push, f) && case_default,
#endif

QUICKJS_OPCODES(FMT, DEF, def)
#undef FMT
#undef DEF
#undef def
        [ OP_COUNT ... 255 ] = &&case_default
    };
#define SWITCH(pc)      goto *dispatch_table[opcode = (OPCodeEnum) *pc++];
#define CASE(op)        case_ ## op
#define DEFAULT         case_default
#define BREAK           SWITCH(pc)
#endif

    if (js_poll_interrupts(caller_ctx))
        return JS_EXCEPTION;
    if (js_unlikely(JS_VALUE_GET_TAG(func_obj) != JS_TAG_OBJECT)) {
        if (flags & JS_CALL_FLAG_GENERATOR) {
            auto s = (JSAsyncFunctionState*) JS_VALUE_GET_PTR(func_obj);
            /* func_obj get contains a pointer to JSFuncAsyncState */
            /* the stack frame is already allocated */
            sf = &s->frame;
            p = JS_VALUE_GET_OBJ(sf->cur_func);
            b = p->u.func.function_bytecode;
            ctx = b->realm;
            var_refs = p->u.func.var_refs;
            local_buf = arg_buf = sf->arg_buf;
            var_buf = sf->var_buf;
            stack_buf = sf->var_buf + b->var_count;
            sp = sf->cur_sp;
            sf->cur_sp = NULL; /* cur_sp is NULL if the function is running */
            pc = sf->cur_pc;
            sf->prev_frame = rt->current_stack_frame;
            rt->current_stack_frame = sf;
            if (s->throw_flag)
                goto exception;
            else
                goto restart;
        } else {
            goto not_a_function;
        }
    }
    p = JS_VALUE_GET_OBJ(func_obj);
    if (js_unlikely(p->class_id != JS_CLASS_BYTECODE_FUNCTION)) {
        JSClassCall *call_func;
        call_func = rt->class_array[p->class_id].call;
        if (!call_func) {
        not_a_function:
            return JS_ThrowTypeError(caller_ctx, "not a function");
        }
        return call_func(caller_ctx, func_obj, this_obj, argc,
                         (JSValueConst *)argv, flags);
    }
    b = p->u.func.function_bytecode;

    if (js_unlikely(argc < b->arg_count || (flags & JS_CALL_FLAG_COPY_ARGV))) {
        arg_allocated_size = b->arg_count;
    } else {
        arg_allocated_size = 0;
    }

    alloca_size = sizeof(JSValue) * (arg_allocated_size + b->var_count +
                                     b->stack_size);
    if (js_check_stack_overflow(rt, alloca_size))
        return JS_ThrowStackOverflow(caller_ctx);

    sf->js_mode = b->js_mode;
    arg_buf = argv;
    sf->arg_count = argc;
    sf->cur_func = (JSValue)func_obj;
    init_list_head(&sf->var_ref_list);
    var_refs = p->u.func.var_refs;

    local_buf = (JSValue*) alloca(alloca_size);
    if (js_unlikely(arg_allocated_size)) {
        int n = min_int(argc, b->arg_count);
        arg_buf = local_buf;
        for(i = 0; i < n; i++)
            arg_buf[i] = JS_DupValue(caller_ctx, argv[i]);
        for(; i < b->arg_count; i++)
            arg_buf[i] = JS_UNDEFINED;
        sf->arg_count = b->arg_count;
    }
    var_buf = local_buf + arg_allocated_size;
    sf->var_buf = var_buf;
    sf->arg_buf = arg_buf;

    for(i = 0; i < b->var_count; i++)
        var_buf[i] = JS_UNDEFINED;

    stack_buf = var_buf + b->var_count;
    sp = stack_buf;
    pc = b->byte_code_buf;
    sf->prev_frame = rt->current_stack_frame;
    rt->current_stack_frame = sf;
    ctx = b->realm; /* set the current realm */

 restart:
    for(;;) {
        int call_argc;
        JSValue *call_argv;

        SWITCH(pc) {
        CASE(OP_push_i32):
            *sp++ = JS_NewInt32(ctx, get_u32(pc));
            pc += 4;
            BREAK;
        CASE(OP_push_const):
            *sp++ = JS_DupValue(ctx, b->cpool[get_u32(pc)]);
            pc += 4;
            BREAK;
#if SHORT_OPCODES
        CASE(OP_push_minus1):
        CASE(OP_push_0):
        CASE(OP_push_1):
        CASE(OP_push_2):
        CASE(OP_push_3):
        CASE(OP_push_4):
        CASE(OP_push_5):
        CASE(OP_push_6):
        CASE(OP_push_7):
            *sp++ = JS_NewInt32(ctx, opcode - OP_push_0);
            BREAK;
        CASE(OP_push_i8):
            *sp++ = JS_NewInt32(ctx, get_i8(pc));
            pc += 1;
            BREAK;
        CASE(OP_push_i16):
            *sp++ = JS_NewInt32(ctx, get_i16(pc));
            pc += 2;
            BREAK;
        CASE(OP_push_const8):
            *sp++ = JS_DupValue(ctx, b->cpool[*pc++]);
            BREAK;
        CASE(OP_fclosure8):
            *sp++ = js_closure(ctx, JS_DupValue(ctx, b->cpool[*pc++]), var_refs, sf);
            if (js_unlikely(JS_IsException(sp[-1])))
                goto exception;
            BREAK;
        CASE(OP_push_empty_string):
            *sp++ = JS_AtomToString(ctx, JS_ATOM_empty_string);
            BREAK;
        CASE(OP_get_length):
            {
                JSValue val;

                val = JS_GetProperty(ctx, sp[-1], JS_ATOM_length);
                if (js_unlikely(JS_IsException(val)))
                    goto exception;
                JS_FreeValue(ctx, sp[-1]);
                sp[-1] = val;
            }
            BREAK;
#endif
        CASE(OP_push_atom_value):
            *sp++ = JS_AtomToValue(ctx, get_u32(pc));
            pc += 4;
            BREAK;
        CASE(OP_undefined):
            *sp++ = JS_UNDEFINED;
            BREAK;
        CASE(OP_null):
            *sp++ = JS_NULL;
            BREAK;
        CASE(OP_push_this):
            /* OP_push_this is only called at the start of a function */
            {
                JSValue val;
                if (!(b->js_mode & JS_MODE_STRICT)) {
                    uint32_t tag = JS_VALUE_GET_TAG(this_obj);
                    if (js_likely(tag == JS_TAG_OBJECT))
                        goto normal_this;
                    if (tag == JS_TAG_NULL || tag == JS_TAG_UNDEFINED) {
                        val = JS_DupValue(ctx, ctx->global_obj);
                    } else {
                        val = JS_ToObject(ctx, this_obj);
                        if (JS_IsException(val))
                            goto exception;
                    }
                } else {
                normal_this:
                    val = JS_DupValue(ctx, this_obj);
                }
                *sp++ = val;
            }
            BREAK;
        CASE(OP_push_false):
            *sp++ = JS_FALSE;
            BREAK;
        CASE(OP_push_true):
            *sp++ = JS_TRUE;
            BREAK;
        CASE(OP_object):
            *sp++ = JS_NewObject(ctx);
            if (js_unlikely(JS_IsException(sp[-1])))
                goto exception;
            BREAK;
        CASE(OP_special_object):
            {
                int arg = *pc++;
                switch(arg) {
                case OP_SPECIAL_OBJECT_ARGUMENTS:
                    *sp++ = js_build_arguments(ctx, argc, (JSValueConst *)argv);
                    if (js_unlikely(JS_IsException(sp[-1])))
                        goto exception;
                    break;
                case OP_SPECIAL_OBJECT_MAPPED_ARGUMENTS:
                    *sp++ = js_build_mapped_arguments(ctx, argc, (JSValueConst *)argv,
                                                      sf, min_int(argc, b->arg_count));
                    if (js_unlikely(JS_IsException(sp[-1])))
                        goto exception;
                    break;
                case OP_SPECIAL_OBJECT_THIS_FUNC:
                    *sp++ = JS_DupValue(ctx, sf->cur_func);
                    break;
                case OP_SPECIAL_OBJECT_NEW_TARGET:
                    *sp++ = JS_DupValue(ctx, new_target);
                    break;
                case OP_SPECIAL_OBJECT_HOME_OBJECT:
                    {
                        JSObject *p1;
                        p1 = p->u.func.home_object;
                        if (js_unlikely(!p1))
                            *sp++ = JS_UNDEFINED;
                        else
                            *sp++ = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, p1));
                    }
                    break;
                case OP_SPECIAL_OBJECT_VAR_OBJECT:
                    *sp++ = JS_NewObjectProto(ctx, JS_NULL);
                    if (js_unlikely(JS_IsException(sp[-1])))
                        goto exception;
                    break;
                case OP_SPECIAL_OBJECT_IMPORT_META:
                    *sp++ = js_import_meta(ctx);
                    if (js_unlikely(JS_IsException(sp[-1])))
                        goto exception;
                    break;
                default:
                    abort();
                }
            }
            BREAK;
        CASE(OP_rest):
            {
                int first = get_u16(pc);
                pc += 2;
                *sp++ = js_build_rest(ctx, first, argc, (JSValueConst *)argv);
                if (js_unlikely(JS_IsException(sp[-1])))
                    goto exception;
            }
            BREAK;

        CASE(OP_drop):
            JS_FreeValue(ctx, sp[-1]);
            sp--;
            BREAK;
        CASE(OP_nip):
            JS_FreeValue(ctx, sp[-2]);
            sp[-2] = sp[-1];
            sp--;
            BREAK;
        CASE(OP_nip1): /* a b c -> b c */
            JS_FreeValue(ctx, sp[-3]);
            sp[-3] = sp[-2];
            sp[-2] = sp[-1];
            sp--;
            BREAK;
        CASE(OP_dup):
            sp[0] = JS_DupValue(ctx, sp[-1]);
            sp++;
            BREAK;
        CASE(OP_dup2): /* a b -> a b a b */
            sp[0] = JS_DupValue(ctx, sp[-2]);
            sp[1] = JS_DupValue(ctx, sp[-1]);
            sp += 2;
            BREAK;
        CASE(OP_dup3): /* a b c -> a b c a b c */
            sp[0] = JS_DupValue(ctx, sp[-3]);
            sp[1] = JS_DupValue(ctx, sp[-2]);
            sp[2] = JS_DupValue(ctx, sp[-1]);
            sp += 3;
            BREAK;
        CASE(OP_dup1): /* a b -> a a b */
            sp[0] = sp[-1];
            sp[-1] = JS_DupValue(ctx, sp[-2]);
            sp++;
            BREAK;
        CASE(OP_insert2): /* obj a -> a obj a (dup_x1) */
            sp[0] = sp[-1];
            sp[-1] = sp[-2];
            sp[-2] = JS_DupValue(ctx, sp[0]);
            sp++;
            BREAK;
        CASE(OP_insert3): /* obj prop a -> a obj prop a (dup_x2) */
            sp[0] = sp[-1];
            sp[-1] = sp[-2];
            sp[-2] = sp[-3];
            sp[-3] = JS_DupValue(ctx, sp[0]);
            sp++;
            BREAK;
        CASE(OP_insert4): /* this obj prop a -> a this obj prop a */
            sp[0] = sp[-1];
            sp[-1] = sp[-2];
            sp[-2] = sp[-3];
            sp[-3] = sp[-4];
            sp[-4] = JS_DupValue(ctx, sp[0]);
            sp++;
            BREAK;
        CASE(OP_perm3): /* obj a b -> a obj b (213) */
            {
                JSValue tmp;
                tmp = sp[-2];
                sp[-2] = sp[-3];
                sp[-3] = tmp;
            }
            BREAK;
        CASE(OP_rot3l): /* x a b -> a b x (231) */
            {
                JSValue tmp;
                tmp = sp[-3];
                sp[-3] = sp[-2];
                sp[-2] = sp[-1];
                sp[-1] = tmp;
            }
            BREAK;
        CASE(OP_rot4l): /* x a b c -> a b c x */
            {
                JSValue tmp;
                tmp = sp[-4];
                sp[-4] = sp[-3];
                sp[-3] = sp[-2];
                sp[-2] = sp[-1];
                sp[-1] = tmp;
            }
            BREAK;
        CASE(OP_rot5l): /* x a b c d -> a b c d x */
            {
                JSValue tmp;
                tmp = sp[-5];
                sp[-5] = sp[-4];
                sp[-4] = sp[-3];
                sp[-3] = sp[-2];
                sp[-2] = sp[-1];
                sp[-1] = tmp;
            }
            BREAK;
        CASE(OP_rot3r): /* a b x -> x a b (312) */
            {
                JSValue tmp;
                tmp = sp[-1];
                sp[-1] = sp[-2];
                sp[-2] = sp[-3];
                sp[-3] = tmp;
            }
            BREAK;
        CASE(OP_perm4): /* obj prop a b -> a obj prop b */
            {
                JSValue tmp;
                tmp = sp[-2];
                sp[-2] = sp[-3];
                sp[-3] = sp[-4];
                sp[-4] = tmp;
            }
            BREAK;
        CASE(OP_perm5): /* this obj prop a b -> a this obj prop b */
            {
                JSValue tmp;
                tmp = sp[-2];
                sp[-2] = sp[-3];
                sp[-3] = sp[-4];
                sp[-4] = sp[-5];
                sp[-5] = tmp;
            }
            BREAK;
        CASE(OP_swap): /* a b -> b a */
            {
                JSValue tmp;
                tmp = sp[-2];
                sp[-2] = sp[-1];
                sp[-1] = tmp;
            }
            BREAK;
        CASE(OP_swap2): /* a b c d -> c d a b */
            {
                JSValue tmp1, tmp2;
                tmp1 = sp[-4];
                tmp2 = sp[-3];
                sp[-4] = sp[-2];
                sp[-3] = sp[-1];
                sp[-2] = tmp1;
                sp[-1] = tmp2;
            }
            BREAK;

        CASE(OP_fclosure):
            {
                JSValue bfunc = JS_DupValue(ctx, b->cpool[get_u32(pc)]);
                pc += 4;
                *sp++ = js_closure(ctx, bfunc, var_refs, sf);
                if (js_unlikely(JS_IsException(sp[-1])))
                    goto exception;
            }
            BREAK;
#if SHORT_OPCODES
        CASE(OP_call0):
        CASE(OP_call1):
        CASE(OP_call2):
        CASE(OP_call3):
            call_argc = opcode - OP_call0;
            goto has_call_argc;
#endif
        CASE(OP_call):
        CASE(OP_tail_call):
            {
                call_argc = get_u16(pc);
                pc += 2;
                goto has_call_argc;
            has_call_argc:
                call_argv = sp - call_argc;
                sf->cur_pc = pc;
                ret_val = JS_CallInternal(ctx, call_argv[-1], JS_UNDEFINED,
                                          JS_UNDEFINED, call_argc, call_argv, 0);
                if (js_unlikely(JS_IsException(ret_val)))
                    goto exception;
                if (opcode == OP_tail_call)
                    goto done;
                for(i = -1; i < call_argc; i++)
                    JS_FreeValue(ctx, call_argv[i]);
                sp -= call_argc + 1;
                *sp++ = ret_val;
            }
            BREAK;
        CASE(OP_call_constructor):
            {
                call_argc = get_u16(pc);
                pc += 2;
                call_argv = sp - call_argc;
                sf->cur_pc = pc;
                ret_val = JS_CallConstructorInternal(ctx, call_argv[-2],
                                                     call_argv[-1],
                                                     call_argc, call_argv, 0);
                if (js_unlikely(JS_IsException(ret_val)))
                    goto exception;
                for(i = -2; i < call_argc; i++)
                    JS_FreeValue(ctx, call_argv[i]);
                sp -= call_argc + 2;
                *sp++ = ret_val;
            }
            BREAK;
        CASE(OP_call_method):
        CASE(OP_tail_call_method):
            {
                call_argc = get_u16(pc);
                pc += 2;
                call_argv = sp - call_argc;
                sf->cur_pc = pc;
                ret_val = JS_CallInternal(ctx, call_argv[-1], call_argv[-2],
                                          JS_UNDEFINED, call_argc, call_argv, 0);
                if (js_unlikely(JS_IsException(ret_val)))
                    goto exception;
                if (opcode == OP_tail_call_method)
                    goto done;
                for(i = -2; i < call_argc; i++)
                    JS_FreeValue(ctx, call_argv[i]);
                sp -= call_argc + 2;
                *sp++ = ret_val;
            }
            BREAK;
        CASE(OP_array_from):
            {
                int i, ret;

                call_argc = get_u16(pc);
                pc += 2;
                ret_val = JS_NewArray(ctx);
                if (js_unlikely(JS_IsException(ret_val)))
                    goto exception;
                call_argv = sp - call_argc;
                for(i = 0; i < call_argc; i++) {
                    ret = JS_DefinePropertyValue(ctx, ret_val, __JS_AtomFromUInt32(i), call_argv[i],
                                                 JS_PROP_C_W_E | JS_PROP_THROW);
                    call_argv[i] = JS_UNDEFINED;
                    if (ret < 0) {
                        JS_FreeValue(ctx, ret_val);
                        goto exception;
                    }
                }
                sp -= call_argc;
                *sp++ = ret_val;
            }
            BREAK;

        CASE(OP_apply):
            {
                int magic;
                magic = get_u16(pc);
                pc += 2;

                ret_val = js_function_apply(ctx, sp[-3], 2, (JSValueConst *)&sp[-2], magic);
                if (js_unlikely(JS_IsException(ret_val)))
                    goto exception;
                JS_FreeValue(ctx, sp[-3]);
                JS_FreeValue(ctx, sp[-2]);
                JS_FreeValue(ctx, sp[-1]);
                sp -= 3;
                *sp++ = ret_val;
            }
            BREAK;
        CASE(OP_return):
            ret_val = *--sp;
            goto done;
        CASE(OP_return_undef):
            ret_val = JS_UNDEFINED;
            goto done;

        CASE(OP_check_ctor_return):
            /* return TRUE if 'this' should be returned */
            if (!JS_IsObject(sp[-1])) {
                if (!JS_IsUndefined(sp[-1])) {
                    JS_ThrowTypeError(caller_ctx, "derived class constructor must return an object or undefined");
                    goto exception;
                }
                sp[0] = JS_TRUE;
            } else {
                sp[0] = JS_FALSE;
            }
            sp++;
            BREAK;
        CASE(OP_check_ctor):
            if (JS_IsUndefined(new_target)) {
                JS_ThrowTypeError(ctx, "class constructors must be invoked with 'new'");
                goto exception;
            }
            BREAK;
        CASE(OP_check_brand):
            if (JS_CheckBrand(ctx, sp[-2], sp[-1]) < 0)
                goto exception;
            BREAK;
        CASE(OP_add_brand):
            if (JS_AddBrand(ctx, sp[-2], sp[-1]) < 0)
                goto exception;
            JS_FreeValue(ctx, sp[-2]);
            JS_FreeValue(ctx, sp[-1]);
            sp -= 2;
            BREAK;

        CASE(OP_throw):
            JS_Throw(ctx, *--sp);
            goto exception;

        CASE(OP_throw_error):
#define JS_THROW_VAR_RO             0
#define JS_THROW_VAR_REDECL         1
#define JS_THROW_VAR_UNINITIALIZED  2
#define JS_THROW_ERROR_DELETE_SUPER   3
#define JS_THROW_ERROR_ITERATOR_THROW 4
            {
                JSAtom atom;
                int type;
                atom = get_u32(pc);
                type = pc[4];
                pc += 5;
                if (type == JS_THROW_VAR_RO)
                    JS_ThrowTypeErrorReadOnly(ctx, JS_PROP_THROW, atom);
                else
                if (type == JS_THROW_VAR_REDECL)
                    JS_ThrowSyntaxErrorVarRedeclaration(ctx, atom);
                else
                if (type == JS_THROW_VAR_UNINITIALIZED)
                    JS_ThrowReferenceErrorUninitialized(ctx, atom);
                else
                if (type == JS_THROW_ERROR_DELETE_SUPER)
                    JS_ThrowReferenceError(ctx, "unsupported reference to 'super'");
                else
                if (type == JS_THROW_ERROR_ITERATOR_THROW)
                    JS_ThrowTypeError(ctx, "iterator does not have a throw method");
                else
                    JS_ThrowInternalError(ctx, "invalid throw var type %d", type);
            }
            goto exception;

        CASE(OP_eval):
            {
                JSValueConst obj;
                int scope_idx;
                call_argc = get_u16(pc);
                scope_idx = get_u16(pc + 2) - 1;
                pc += 4;
                call_argv = sp - call_argc;
                sf->cur_pc = pc;
                if (js_same_value(ctx, call_argv[-1], ctx->eval_obj)) {
                    if (call_argc >= 1)
                        obj = call_argv[0];
                    else
                        obj = JS_UNDEFINED;
                    ret_val = JS_EvalObject(ctx, JS_UNDEFINED, obj,
                                            JS_EVAL_TYPE_DIRECT, scope_idx);
                } else {
                    ret_val = JS_CallInternal(ctx, call_argv[-1], JS_UNDEFINED,
                                              JS_UNDEFINED, call_argc, call_argv, 0);
                }
                if (js_unlikely(JS_IsException(ret_val)))
                    goto exception;
                for(i = -1; i < call_argc; i++)
                    JS_FreeValue(ctx, call_argv[i]);
                sp -= call_argc + 1;
                *sp++ = ret_val;
            }
            BREAK;
            /* could merge with OP_apply */
        CASE(OP_apply_eval):
            {
                int scope_idx;
                uint32_t len;
                JSValue *tab;
                JSValueConst obj;

                scope_idx = get_u16(pc) - 1;
                pc += 2;
                tab = build_arg_list(ctx, &len, sp[-1]);
                if (!tab)
                    goto exception;
                if (js_same_value(ctx, sp[-2], ctx->eval_obj)) {
                    if (len >= 1)
                        obj = tab[0];
                    else
                        obj = JS_UNDEFINED;
                    ret_val = JS_EvalObject(ctx, JS_UNDEFINED, obj,
                                            JS_EVAL_TYPE_DIRECT, scope_idx);
                } else {
                    ret_val = JS_Call(ctx, sp[-2], JS_UNDEFINED, len,
                                      (JSValueConst *)tab);
                }
                free_arg_list(ctx, tab, len);
                if (js_unlikely(JS_IsException(ret_val)))
                    goto exception;
                JS_FreeValue(ctx, sp[-2]);
                JS_FreeValue(ctx, sp[-1]);
                sp -= 2;
                *sp++ = ret_val;
            }
            BREAK;

        CASE(OP_regexp):
            {
                sp[-2] = js_regexp_constructor_internal(ctx, JS_UNDEFINED,
                                                        sp[-2], sp[-1]);
                sp--;
            }
            BREAK;

        CASE(OP_get_super):
            {
                JSValue proto;
                proto = JS_GetPrototype(ctx, sp[-1]);
                if (JS_IsException(proto))
                    goto exception;
                JS_FreeValue(ctx, sp[-1]);
                sp[-1] = proto;
            }
            BREAK;

        CASE(OP_import):
            {
                JSValue val;
                val = js_dynamic_import(ctx, sp[-1]);
                if (JS_IsException(val))
                    goto exception;
                JS_FreeValue(ctx, sp[-1]);
                sp[-1] = val;
            }
            BREAK;

        CASE(OP_check_var):
            {
                int ret;
                JSAtom atom;
                atom = get_u32(pc);
                pc += 4;

                ret = JS_CheckGlobalVar(ctx, atom);
                if (ret < 0)
                    goto exception;
                *sp++ = JS_NewBool(ctx, ret);
            }
            BREAK;

        CASE(OP_get_var_undef):
        CASE(OP_get_var):
            {
                JSValue val;
                JSAtom atom;
                atom = get_u32(pc);
                pc += 4;

                val = JS_GetGlobalVar(ctx, atom, opcode - OP_get_var_undef);
                if (js_unlikely(JS_IsException(val)))
                    goto exception;
                *sp++ = val;
            }
            BREAK;

        CASE(OP_put_var):
        CASE(OP_put_var_init):
            {
                int ret;
                JSAtom atom;
                atom = get_u32(pc);
                pc += 4;

                ret = JS_SetGlobalVar(ctx, atom, sp[-1], opcode - OP_put_var);
                sp--;
                if (js_unlikely(ret < 0))
                    goto exception;
            }
            BREAK;

        CASE(OP_put_var_strict):
            {
                int ret;
                JSAtom atom;
                atom = get_u32(pc);
                pc += 4;

                /* sp[-2] is JS_TRUE or JS_FALSE */
                if (js_unlikely(!JS_VALUE_GET_INT(sp[-2]))) {
                    JS_ThrowReferenceErrorNotDefined(ctx, atom);
                    goto exception;
                }
                ret = JS_SetGlobalVar(ctx, atom, sp[-1], 2);
                sp -= 2;
                if (js_unlikely(ret < 0))
                    goto exception;
            }
            BREAK;

        CASE(OP_check_define_var):
            {
                JSAtom atom;
                int flags;
                atom = get_u32(pc);
                flags = pc[4];
                pc += 5;
                if (JS_CheckDefineGlobalVar(ctx, atom, flags))
                    goto exception;
            }
            BREAK;
        CASE(OP_define_var):
            {
                JSAtom atom;
                int flags;
                atom = get_u32(pc);
                flags = pc[4];
                pc += 5;
                if (JS_DefineGlobalVar(ctx, atom, flags))
                    goto exception;
            }
            BREAK;
        CASE(OP_define_func):
            {
                JSAtom atom;
                int flags;
                atom = get_u32(pc);
                flags = pc[4];
                pc += 5;
                if (JS_DefineGlobalFunction(ctx, atom, sp[-1], flags))
                    goto exception;
                JS_FreeValue(ctx, sp[-1]);
                sp--;
            }
            BREAK;

        CASE(OP_get_loc):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                sp[0] = JS_DupValue(ctx, var_buf[idx]);
                sp++;
            }
            BREAK;
        CASE(OP_put_loc):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                set_value(ctx, &var_buf[idx], sp[-1]);
                sp--;
            }
            BREAK;
        CASE(OP_set_loc):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                set_value(ctx, &var_buf[idx], JS_DupValue(ctx, sp[-1]));
            }
            BREAK;
        CASE(OP_get_arg):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                sp[0] = JS_DupValue(ctx, arg_buf[idx]);
                sp++;
            }
            BREAK;
        CASE(OP_put_arg):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                set_value(ctx, &arg_buf[idx], sp[-1]);
                sp--;
            }
            BREAK;
        CASE(OP_set_arg):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                set_value(ctx, &arg_buf[idx], JS_DupValue(ctx, sp[-1]));
            }
            BREAK;

#if SHORT_OPCODES
        CASE(OP_get_loc8): *sp++ = JS_DupValue(ctx, var_buf[*pc++]); BREAK;
        CASE(OP_put_loc8): set_value(ctx, &var_buf[*pc++], *--sp); BREAK;
        CASE(OP_set_loc8): set_value(ctx, &var_buf[*pc++], JS_DupValue(ctx, sp[-1])); BREAK;

        CASE(OP_get_loc0): *sp++ = JS_DupValue(ctx, var_buf[0]); BREAK;
        CASE(OP_get_loc1): *sp++ = JS_DupValue(ctx, var_buf[1]); BREAK;
        CASE(OP_get_loc2): *sp++ = JS_DupValue(ctx, var_buf[2]); BREAK;
        CASE(OP_get_loc3): *sp++ = JS_DupValue(ctx, var_buf[3]); BREAK;
        CASE(OP_put_loc0): set_value(ctx, &var_buf[0], *--sp); BREAK;
        CASE(OP_put_loc1): set_value(ctx, &var_buf[1], *--sp); BREAK;
        CASE(OP_put_loc2): set_value(ctx, &var_buf[2], *--sp); BREAK;
        CASE(OP_put_loc3): set_value(ctx, &var_buf[3], *--sp); BREAK;
        CASE(OP_set_loc0): set_value(ctx, &var_buf[0], JS_DupValue(ctx, sp[-1])); BREAK;
        CASE(OP_set_loc1): set_value(ctx, &var_buf[1], JS_DupValue(ctx, sp[-1])); BREAK;
        CASE(OP_set_loc2): set_value(ctx, &var_buf[2], JS_DupValue(ctx, sp[-1])); BREAK;
        CASE(OP_set_loc3): set_value(ctx, &var_buf[3], JS_DupValue(ctx, sp[-1])); BREAK;
        CASE(OP_get_arg0): *sp++ = JS_DupValue(ctx, arg_buf[0]); BREAK;
        CASE(OP_get_arg1): *sp++ = JS_DupValue(ctx, arg_buf[1]); BREAK;
        CASE(OP_get_arg2): *sp++ = JS_DupValue(ctx, arg_buf[2]); BREAK;
        CASE(OP_get_arg3): *sp++ = JS_DupValue(ctx, arg_buf[3]); BREAK;
        CASE(OP_put_arg0): set_value(ctx, &arg_buf[0], *--sp); BREAK;
        CASE(OP_put_arg1): set_value(ctx, &arg_buf[1], *--sp); BREAK;
        CASE(OP_put_arg2): set_value(ctx, &arg_buf[2], *--sp); BREAK;
        CASE(OP_put_arg3): set_value(ctx, &arg_buf[3], *--sp); BREAK;
        CASE(OP_set_arg0): set_value(ctx, &arg_buf[0], JS_DupValue(ctx, sp[-1])); BREAK;
        CASE(OP_set_arg1): set_value(ctx, &arg_buf[1], JS_DupValue(ctx, sp[-1])); BREAK;
        CASE(OP_set_arg2): set_value(ctx, &arg_buf[2], JS_DupValue(ctx, sp[-1])); BREAK;
        CASE(OP_set_arg3): set_value(ctx, &arg_buf[3], JS_DupValue(ctx, sp[-1])); BREAK;
        CASE(OP_get_var_ref0): *sp++ = JS_DupValue(ctx, *var_refs[0]->pvalue); BREAK;
        CASE(OP_get_var_ref1): *sp++ = JS_DupValue(ctx, *var_refs[1]->pvalue); BREAK;
        CASE(OP_get_var_ref2): *sp++ = JS_DupValue(ctx, *var_refs[2]->pvalue); BREAK;
        CASE(OP_get_var_ref3): *sp++ = JS_DupValue(ctx, *var_refs[3]->pvalue); BREAK;
        CASE(OP_put_var_ref0): set_value(ctx, var_refs[0]->pvalue, *--sp); BREAK;
        CASE(OP_put_var_ref1): set_value(ctx, var_refs[1]->pvalue, *--sp); BREAK;
        CASE(OP_put_var_ref2): set_value(ctx, var_refs[2]->pvalue, *--sp); BREAK;
        CASE(OP_put_var_ref3): set_value(ctx, var_refs[3]->pvalue, *--sp); BREAK;
        CASE(OP_set_var_ref0): set_value(ctx, var_refs[0]->pvalue, JS_DupValue(ctx, sp[-1])); BREAK;
        CASE(OP_set_var_ref1): set_value(ctx, var_refs[1]->pvalue, JS_DupValue(ctx, sp[-1])); BREAK;
        CASE(OP_set_var_ref2): set_value(ctx, var_refs[2]->pvalue, JS_DupValue(ctx, sp[-1])); BREAK;
        CASE(OP_set_var_ref3): set_value(ctx, var_refs[3]->pvalue, JS_DupValue(ctx, sp[-1])); BREAK;
#endif

        CASE(OP_get_var_ref):
            {
                int idx;
                JSValue val;
                idx = get_u16(pc);
                pc += 2;
                val = *var_refs[idx]->pvalue;
                sp[0] = JS_DupValue(ctx, val);
                sp++;
            }
            BREAK;
        CASE(OP_put_var_ref):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                set_value(ctx, var_refs[idx]->pvalue, sp[-1]);
                sp--;
            }
            BREAK;
        CASE(OP_set_var_ref):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                set_value(ctx, var_refs[idx]->pvalue, JS_DupValue(ctx, sp[-1]));
            }
            BREAK;
        CASE(OP_get_var_ref_check):
            {
                int idx;
                JSValue val;
                idx = get_u16(pc);
                pc += 2;
                val = *var_refs[idx]->pvalue;
                if (js_unlikely(JS_IsUninitialized(val))) {
                    JS_ThrowReferenceErrorUninitialized2(ctx, b, idx, TRUE);
                    goto exception;
                }
                sp[0] = JS_DupValue(ctx, val);
                sp++;
            }
            BREAK;
        CASE(OP_put_var_ref_check):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                if (js_unlikely(JS_IsUninitialized(*var_refs[idx]->pvalue))) {
                    JS_ThrowReferenceErrorUninitialized2(ctx, b, idx, TRUE);
                    goto exception;
                }
                set_value(ctx, var_refs[idx]->pvalue, sp[-1]);
                sp--;
            }
            BREAK;
        CASE(OP_put_var_ref_check_init):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                if (js_unlikely(!JS_IsUninitialized(*var_refs[idx]->pvalue))) {
                    JS_ThrowReferenceErrorUninitialized2(ctx, b, idx, TRUE);
                    goto exception;
                }
                set_value(ctx, var_refs[idx]->pvalue, sp[-1]);
                sp--;
            }
            BREAK;
        CASE(OP_set_loc_uninitialized):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                set_value(ctx, &var_buf[idx], JS_UNINITIALIZED);
            }
            BREAK;
        CASE(OP_get_loc_check):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                if (js_unlikely(JS_IsUninitialized(var_buf[idx]))) {
                    JS_ThrowReferenceErrorUninitialized2(ctx, b, idx, FALSE);
                    goto exception;
                }
                sp[0] = JS_DupValue(ctx, var_buf[idx]);
                sp++;
            }
            BREAK;
        CASE(OP_put_loc_check):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                if (js_unlikely(JS_IsUninitialized(var_buf[idx]))) {
                    JS_ThrowReferenceErrorUninitialized2(ctx, b, idx, FALSE);
                    goto exception;
                }
                set_value(ctx, &var_buf[idx], sp[-1]);
                sp--;
            }
            BREAK;
        CASE(OP_put_loc_check_init):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                if (js_unlikely(!JS_IsUninitialized(var_buf[idx]))) {
                    JS_ThrowReferenceError(ctx, "'this' can be initialized only once");
                    goto exception;
                }
                set_value(ctx, &var_buf[idx], sp[-1]);
                sp--;
            }
            BREAK;
        CASE(OP_close_loc):
            {
                int idx;
                idx = get_u16(pc);
                pc += 2;
                close_lexical_var(ctx, sf, idx, FALSE);
            }
            BREAK;

        CASE(OP_make_loc_ref):
        CASE(OP_make_arg_ref):
        CASE(OP_make_var_ref_ref):
            {
                JSVarRef *var_ref;
                JSProperty *pr;
                JSAtom atom;
                int idx;
                atom = get_u32(pc);
                idx = get_u16(pc + 4);
                pc += 6;
                *sp++ = JS_NewObjectProto(ctx, JS_NULL);
                if (js_unlikely(JS_IsException(sp[-1])))
                    goto exception;
                if (opcode == OP_make_var_ref_ref) {
                    var_ref = var_refs[idx];
                    var_ref->header.ref_count++;
                } else {
                    var_ref = get_var_ref(ctx, sf, idx, opcode == OP_make_arg_ref);
                    if (!var_ref)
                        goto exception;
                }
                pr = add_property(ctx, JS_VALUE_GET_OBJ(sp[-1]), atom,
                                  JS_PROP_WRITABLE | JS_PROP_VARREF);
                if (!pr) {
                    free_var_ref(rt, var_ref);
                    goto exception;
                }
                pr->u.var_ref = var_ref;
                *sp++ = JS_AtomToValue(ctx, atom);
            }
            BREAK;
        CASE(OP_make_var_ref):
            {
                JSAtom atom;
                atom = get_u32(pc);
                pc += 4;

                if (JS_GetGlobalVarRef(ctx, atom, sp))
                    goto exception;
                sp += 2;
            }
            BREAK;

        CASE(OP_goto):
            pc += (int32_t)get_u32(pc);
            if (js_unlikely(js_poll_interrupts(ctx)))
                goto exception;
            BREAK;
#if SHORT_OPCODES
        CASE(OP_goto16):
            pc += (int16_t)get_u16(pc);
            if (js_unlikely(js_poll_interrupts(ctx)))
                goto exception;
            BREAK;
        CASE(OP_goto8):
            pc += (int8_t)pc[0];
            if (js_unlikely(js_poll_interrupts(ctx)))
                goto exception;
            BREAK;
#endif
        CASE(OP_if_true):
            {
                int res;
                JSValue op1;

                op1 = sp[-1];
                pc += 4;
                if ((uint32_t)JS_VALUE_GET_TAG(op1) <= JS_TAG_UNDEFINED) {
                    res = JS_VALUE_GET_INT(op1);
                } else {
                    res = JS_ToBoolFree(ctx, op1);
                }
                sp--;
                if (res) {
                    pc += (int32_t)get_u32(pc - 4) - 4;
                }
                if (js_unlikely(js_poll_interrupts(ctx)))
                    goto exception;
            }
            BREAK;
        CASE(OP_if_false):
            {
                int res;
                JSValue op1;

                op1 = sp[-1];
                pc += 4;
                if ((uint32_t)JS_VALUE_GET_TAG(op1) <= JS_TAG_UNDEFINED) {
                    res = JS_VALUE_GET_INT(op1);
                } else {
                    res = JS_ToBoolFree(ctx, op1);
                }
                sp--;
                if (!res) {
                    pc += (int32_t)get_u32(pc - 4) - 4;
                }
                if (js_unlikely(js_poll_interrupts(ctx)))
                    goto exception;
            }
            BREAK;
#if SHORT_OPCODES
        CASE(OP_if_true8):
            {
                int res;
                JSValue op1;

                op1 = sp[-1];
                pc += 1;
                if ((uint32_t)JS_VALUE_GET_TAG(op1) <= JS_TAG_UNDEFINED) {
                    res = JS_VALUE_GET_INT(op1);
                } else {
                    res = JS_ToBoolFree(ctx, op1);
                }
                sp--;
                if (res) {
                    pc += (int8_t)pc[-1] - 1;
                }
                if (js_unlikely(js_poll_interrupts(ctx)))
                    goto exception;
            }
            BREAK;
        CASE(OP_if_false8):
            {
                int res;
                JSValue op1;

                op1 = sp[-1];
                pc += 1;
                if ((uint32_t)JS_VALUE_GET_TAG(op1) <= JS_TAG_UNDEFINED) {
                    res = JS_VALUE_GET_INT(op1);
                } else {
                    res = JS_ToBoolFree(ctx, op1);
                }
                sp--;
                if (!res) {
                    pc += (int8_t)pc[-1] - 1;
                }
                if (js_unlikely(js_poll_interrupts(ctx)))
                    goto exception;
            }
            BREAK;
#endif
        CASE(OP_catch):
            {
                int32_t diff;
                diff = get_u32(pc);
                sp[0] = JS_NewCatchOffset(ctx, pc + diff - b->byte_code_buf);
                sp++;
                pc += 4;
            }
            BREAK;
        CASE(OP_gosub):
            {
                int32_t diff;
                diff = get_u32(pc);
                /* XXX: should have a different tag to avoid security flaw */
                sp[0] = JS_NewInt32(ctx, pc + 4 - b->byte_code_buf);
                sp++;
                pc += diff;
            }
            BREAK;
        CASE(OP_ret):
            {
                JSValue op1;
                uint32_t pos;
                op1 = sp[-1];
                if (js_unlikely(JS_VALUE_GET_TAG(op1) != JS_TAG_INT))
                    goto ret_fail;
                pos = JS_VALUE_GET_INT(op1);
                if (js_unlikely(pos >= b->byte_code_len)) {
                ret_fail:
                    JS_ThrowInternalError(ctx, "invalid ret value");
                    goto exception;
                }
                sp--;
                pc = b->byte_code_buf + pos;
            }
            BREAK;

        CASE(OP_for_in_start):
            if (js_for_in_start(ctx, sp))
                goto exception;
            BREAK;
        CASE(OP_for_in_next):
            if (js_for_in_next(ctx, sp))
                goto exception;
            sp += 2;
            BREAK;
        CASE(OP_for_of_start):
            if (js_for_of_start(ctx, sp, FALSE))
                goto exception;
            sp += 1;
            *sp++ = JS_NewCatchOffset(ctx, 0);
            BREAK;
        CASE(OP_for_of_next):
            {
                int offset = -3 - pc[0];
                pc += 1;
                if (js_for_of_next(ctx, sp, offset))
                    goto exception;
                sp += 2;
            }
            BREAK;
        CASE(OP_for_await_of_start):
            if (js_for_of_start(ctx, sp, TRUE))
                goto exception;
            sp += 1;
            *sp++ = JS_NewCatchOffset(ctx, 0);
            BREAK;
        CASE(OP_iterator_get_value_done):
            if (js_iterator_get_value_done(ctx, sp))
                goto exception;
            sp += 1;
            BREAK;
        CASE(OP_iterator_check_object):
            if (js_unlikely(!JS_IsObject(sp[-1]))) {
                JS_ThrowTypeError(ctx, "iterator must return an object");
                goto exception;
            }
            BREAK;

        CASE(OP_iterator_close):
            /* iter_obj next catch_offset -> */
            sp--; /* drop the catch offset to avoid getting caught by exception */
            JS_FreeValue(ctx, sp[-1]); /* drop the next method */
            sp--;
            if (!JS_IsUndefined(sp[-1])) {
                if (JS_IteratorClose(ctx, sp[-1], FALSE))
                    goto exception;
                JS_FreeValue(ctx, sp[-1]);
            }
            sp--;
            BREAK;
        CASE(OP_iterator_close_return):
            {
                JSValue ret_val;
                /* iter_obj next catch_offset ... ret_val ->
                   ret_eval iter_obj next catch_offset */
                ret_val = *--sp;
                while (sp > stack_buf &&
                       JS_VALUE_GET_TAG(sp[-1]) != JS_TAG_CATCH_OFFSET) {
                    JS_FreeValue(ctx, *--sp);
                }
                if (js_unlikely(sp < stack_buf + 3)) {
                    JS_ThrowInternalError(ctx, "iterator_close_return");
                    JS_FreeValue(ctx, ret_val);
                    goto exception;
                }
                sp[0] = sp[-1];
                sp[-1] = sp[-2];
                sp[-2] = sp[-3];
                sp[-3] = ret_val;
                sp++;
            }
            BREAK;

        CASE(OP_iterator_next):
            /* stack: iter_obj next catch_offset val */
            {
                JSValue ret;
                ret = JS_Call(ctx, sp[-3], sp[-4],
                              1, (JSValueConst *)(sp - 1));
                if (JS_IsException(ret))
                    goto exception;
                JS_FreeValue(ctx, sp[-1]);
                sp[-1] = ret;
            }
            BREAK;

        CASE(OP_iterator_call):
            /* stack: iter_obj next catch_offset val */
            {
                JSValue method, ret;
                BOOL ret_flag;
                int flags;
                flags = *pc++;
                method = JS_GetProperty(ctx, sp[-4], (flags & 1) ?
                                        JS_ATOM_throw : JS_ATOM_return);
                if (JS_IsException(method))
                    goto exception;
                if (JS_IsUndefined(method) || JS_IsNull(method)) {
                    ret_flag = TRUE;
                } else {
                    if (flags & 2) {
                        /* no argument */
                        ret = JS_CallFree(ctx, method, sp[-4],
                                          0, NULL);
                    } else {
                        ret = JS_CallFree(ctx, method, sp[-4],
                                          1, (JSValueConst *)(sp - 1));
                    }
                    if (JS_IsException(ret))
                        goto exception;
                    JS_FreeValue(ctx, sp[-1]);
                    sp[-1] = ret;
                    ret_flag = FALSE;
                }
                sp[0] = JS_NewBool(ctx, ret_flag);
                sp += 1;
            }
            BREAK;

        CASE(OP_lnot):
            {
                int res;
                JSValue op1;

                op1 = sp[-1];
                if ((uint32_t)JS_VALUE_GET_TAG(op1) <= JS_TAG_UNDEFINED) {
                    res = JS_VALUE_GET_INT(op1) != 0;
                } else {
                    res = JS_ToBoolFree(ctx, op1);
                }
                sp[-1] = JS_NewBool(ctx, !res);
            }
            BREAK;

        CASE(OP_get_field):
            {
                JSValue val;
                JSAtom atom;
                atom = get_u32(pc);
                pc += 4;

                val = JS_GetProperty(ctx, sp[-1], atom);
                if (js_unlikely(JS_IsException(val)))
                    goto exception;
                JS_FreeValue(ctx, sp[-1]);
                sp[-1] = val;
            }
            BREAK;

        CASE(OP_get_field2):
            {
                JSValue val;
                JSAtom atom;
                atom = get_u32(pc);
                pc += 4;

                val = JS_GetProperty(ctx, sp[-1], atom);
                if (js_unlikely(JS_IsException(val)))
                    goto exception;
                *sp++ = val;
            }
            BREAK;

        CASE(OP_put_field):
            {
                int ret;
                JSAtom atom;
                atom = get_u32(pc);
                pc += 4;

                ret = JS_SetPropertyInternal(ctx, sp[-2], atom, sp[-1],
                                             JS_PROP_THROW_STRICT);
                JS_FreeValue(ctx, sp[-2]);
                sp -= 2;
                if (js_unlikely(ret < 0))
                    goto exception;
            }
            BREAK;

        CASE(OP_private_symbol):
            {
                JSAtom atom;
                JSValue val;

                atom = get_u32(pc);
                pc += 4;
                val = JS_NewSymbolFromAtom(ctx, atom, JS_ATOM_TYPE_PRIVATE);
                if (JS_IsException(val))
                    goto exception;
                *sp++ = val;
            }
            BREAK;

        CASE(OP_get_private_field):
            {
                JSValue val;

                val = JS_GetPrivateField(ctx, sp[-2], sp[-1]);
                JS_FreeValue(ctx, sp[-1]);
                JS_FreeValue(ctx, sp[-2]);
                sp[-2] = val;
                sp--;
                if (js_unlikely(JS_IsException(val)))
                    goto exception;
            }
            BREAK;

        CASE(OP_put_private_field):
            {
                int ret;
                ret = JS_SetPrivateField(ctx, sp[-3], sp[-1], sp[-2]);
                JS_FreeValue(ctx, sp[-3]);
                JS_FreeValue(ctx, sp[-1]);
                sp -= 3;
                if (js_unlikely(ret < 0))
                    goto exception;
            }
            BREAK;

        CASE(OP_define_private_field):
            {
                int ret;
                ret = JS_DefinePrivateField(ctx, sp[-3], sp[-2], sp[-1]);
                JS_FreeValue(ctx, sp[-2]);
                sp -= 2;
                if (js_unlikely(ret < 0))
                    goto exception;
            }
            BREAK;

        CASE(OP_define_field):
            {
                int ret;
                JSAtom atom;
                atom = get_u32(pc);
                pc += 4;

                ret = JS_DefinePropertyValue(ctx, sp[-2], atom, sp[-1],
                                             JS_PROP_C_W_E | JS_PROP_THROW);
                sp--;
                if (js_unlikely(ret < 0))
                    goto exception;
            }
            BREAK;

        CASE(OP_set_name):
            {
                int ret;
                JSAtom atom;
                atom = get_u32(pc);
                pc += 4;

                ret = JS_DefineObjectName(ctx, sp[-1], atom, JS_PROP_CONFIGURABLE);
                if (js_unlikely(ret < 0))
                    goto exception;
            }
            BREAK;
        CASE(OP_set_name_computed):
            {
                int ret;
                ret = JS_DefineObjectNameComputed(ctx, sp[-1], sp[-2], JS_PROP_CONFIGURABLE);
                if (js_unlikely(ret < 0))
                    goto exception;
            }
            BREAK;
        CASE(OP_set_proto):
            {
                JSValue proto;
                proto = sp[-1];
                if (JS_IsObject(proto) || JS_IsNull(proto)) {
                    if (JS_SetPrototypeInternal(ctx, sp[-2], proto, TRUE) < 0)
                        goto exception;
                }
                JS_FreeValue(ctx, proto);
                sp--;
            }
            BREAK;
        CASE(OP_set_home_object):
            js_method_set_home_object(ctx, sp[-1], sp[-2]);
            BREAK;
        CASE(OP_define_method):
        CASE(OP_define_method_computed):
            {
                JSValue getter, setter, value;
                JSValueConst obj;
                JSAtom atom;
                int flags, ret, op_flags;
                BOOL is_computed;
#define OP_DEFINE_METHOD_METHOD 0
#define OP_DEFINE_METHOD_GETTER 1
#define OP_DEFINE_METHOD_SETTER 2
#define OP_DEFINE_METHOD_ENUMERABLE 4

                is_computed = (opcode == OP_define_method_computed);
                if (is_computed) {
                    atom = JS_ValueToAtom(ctx, sp[-2]);
                    if (js_unlikely(atom == JS_ATOM_NULL))
                        goto exception;
                    opcode = (OPCodeEnum) (opcode + OP_define_method - OP_define_method_computed);
                } else {
                    atom = get_u32(pc);
                    pc += 4;
                }
                op_flags = *pc++;

                obj = sp[-2 - is_computed];
                flags = JS_PROP_HAS_CONFIGURABLE | JS_PROP_CONFIGURABLE |
                    JS_PROP_HAS_ENUMERABLE | JS_PROP_THROW;
                if (op_flags & OP_DEFINE_METHOD_ENUMERABLE)
                    flags |= JS_PROP_ENUMERABLE;
                op_flags &= 3;
                value = JS_UNDEFINED;
                getter = JS_UNDEFINED;
                setter = JS_UNDEFINED;
                if (op_flags == OP_DEFINE_METHOD_METHOD) {
                    value = sp[-1];
                    flags |= JS_PROP_HAS_VALUE | JS_PROP_HAS_WRITABLE | JS_PROP_WRITABLE;
                } else if (op_flags == OP_DEFINE_METHOD_GETTER) {
                    getter = sp[-1];
                    flags |= JS_PROP_HAS_GET;
                } else {
                    setter = sp[-1];
                    flags |= JS_PROP_HAS_SET;
                }
                ret = js_method_set_properties(ctx, sp[-1], atom, flags, obj);
                if (ret >= 0) {
                    ret = JS_DefineProperty(ctx, obj, atom, value,
                                            getter, setter, flags);
                }
                JS_FreeValue(ctx, sp[-1]);
                if (is_computed) {
                    JS_FreeAtom(ctx, atom);
                    JS_FreeValue(ctx, sp[-2]);
                }
                sp -= 1 + is_computed;
                if (js_unlikely(ret < 0))
                    goto exception;
            }
            BREAK;

        CASE(OP_define_class):
        CASE(OP_define_class_computed):
            {
                int class_flags;
                JSAtom atom;

                atom = get_u32(pc);
                class_flags = pc[4];
                pc += 5;
                if (js_op_define_class(ctx, sp, atom, class_flags,
                                       var_refs, sf,
                                       (opcode == OP_define_class_computed)) < 0)
                    goto exception;
            }
            BREAK;

        CASE(OP_get_array_el):
            {
                JSValue val;

                val = JS_GetPropertyValue(ctx, sp[-2], sp[-1]);
                JS_FreeValue(ctx, sp[-2]);
                sp[-2] = val;
                sp--;
                if (js_unlikely(JS_IsException(val)))
                    goto exception;
            }
            BREAK;

        CASE(OP_get_array_el2):
            {
                JSValue val;

                val = JS_GetPropertyValue(ctx, sp[-2], sp[-1]);
                sp[-1] = val;
                if (js_unlikely(JS_IsException(val)))
                    goto exception;
            }
            BREAK;

        CASE(OP_get_ref_value):
            {
                JSValue val;
                if (js_unlikely(JS_IsUndefined(sp[-2]))) {
                    JSAtom atom = JS_ValueToAtom(ctx, sp[-1]);
                    if (atom != JS_ATOM_NULL) {
                        JS_ThrowReferenceErrorNotDefined(ctx, atom);
                        JS_FreeAtom(ctx, atom);
                    }
                    goto exception;
                }
                val = JS_GetPropertyValue(ctx, sp[-2],
                                          JS_DupValue(ctx, sp[-1]));
                if (js_unlikely(JS_IsException(val)))
                    goto exception;
                sp[0] = val;
                sp++;
            }
            BREAK;

        CASE(OP_get_super_value):
            {
                JSValue val;
                JSAtom atom;
                atom = JS_ValueToAtom(ctx, sp[-1]);
                if (js_unlikely(atom == JS_ATOM_NULL))
                    goto exception;
                val = JS_GetPropertyInternal(ctx, sp[-2], atom, sp[-3], FALSE);
                JS_FreeAtom(ctx, atom);
                if (js_unlikely(JS_IsException(val)))
                    goto exception;
                JS_FreeValue(ctx, sp[-1]);
                JS_FreeValue(ctx, sp[-2]);
                JS_FreeValue(ctx, sp[-3]);
                sp[-3] = val;
                sp -= 2;
            }
            BREAK;

        CASE(OP_put_array_el):
            {
                int ret;

                ret = JS_SetPropertyValue(ctx, sp[-3], sp[-2], sp[-1], JS_PROP_THROW_STRICT);
                JS_FreeValue(ctx, sp[-3]);
                sp -= 3;
                if (js_unlikely(ret < 0))
                    goto exception;
            }
            BREAK;

        CASE(OP_put_ref_value):
            {
                int ret, flags;
                flags = JS_PROP_THROW_STRICT;
                if (js_unlikely(JS_IsUndefined(sp[-3]))) {
                    if (is_strict_mode(ctx)) {
                        JSAtom atom = JS_ValueToAtom(ctx, sp[-2]);
                        if (atom != JS_ATOM_NULL) {
                            JS_ThrowReferenceErrorNotDefined(ctx, atom);
                            JS_FreeAtom(ctx, atom);
                        }
                        goto exception;
                    } else {
                        sp[-3] = JS_DupValue(ctx, ctx->global_obj);
                    }
                } else {
                    if (is_strict_mode(ctx))
                        flags |= JS_PROP_NO_ADD;
                }
                ret = JS_SetPropertyValue(ctx, sp[-3], sp[-2], sp[-1], flags);
                JS_FreeValue(ctx, sp[-3]);
                sp -= 3;
                if (js_unlikely(ret < 0))
                    goto exception;
            }
            BREAK;

        CASE(OP_put_super_value):
            {
                int ret;
                JSAtom atom;
                if (JS_VALUE_GET_TAG(sp[-3]) != JS_TAG_OBJECT) {
                    JS_ThrowTypeErrorNotAnObject(ctx);
                    goto exception;
                }
                atom = JS_ValueToAtom(ctx, sp[-2]);
                if (js_unlikely(atom == JS_ATOM_NULL))
                    goto exception;
                ret = JS_SetPropertyGeneric(ctx, sp[-3], atom, sp[-1], sp[-4],
                                            JS_PROP_THROW_STRICT);
                JS_FreeAtom(ctx, atom);
                JS_FreeValue(ctx, sp[-4]);
                JS_FreeValue(ctx, sp[-3]);
                JS_FreeValue(ctx, sp[-2]);
                sp -= 4;
                if (ret < 0)
                    goto exception;
            }
            BREAK;

        CASE(OP_define_array_el):
            {
                int ret;
                ret = JS_DefinePropertyValueValue(ctx, sp[-3], JS_DupValue(ctx, sp[-2]), sp[-1],
                                                  JS_PROP_C_W_E | JS_PROP_THROW);
                sp -= 1;
                if (js_unlikely(ret < 0))
                    goto exception;
            }
            BREAK;

        CASE(OP_append):    /* array pos enumobj -- array pos */
            {
                if (js_append_enumerate(ctx, sp))
                    goto exception;
                JS_FreeValue(ctx, *--sp);
            }
            BREAK;

        CASE(OP_copy_data_properties):    /* target source excludeList */
            {
                /* stack offsets (-1 based):
                   2 bits for target,
                   3 bits for source,
                   2 bits for exclusionList */
                int mask;

                mask = *pc++;
                if (JS_CopyDataProperties(ctx, sp[-1 - (mask & 3)],
                                          sp[-1 - ((mask >> 2) & 7)],
                                          sp[-1 - ((mask >> 5) & 7)], 0))
                    goto exception;
            }
            BREAK;

        CASE(OP_add):
            {
                JSValue op1, op2;
                op1 = sp[-2];
                op2 = sp[-1];
                if (js_likely(JS_VALUE_IS_BOTH_INT(op1, op2))) {
                    int64_t r;
                    r = (int64_t)JS_VALUE_GET_INT(op1) + JS_VALUE_GET_INT(op2);
                    if (js_unlikely((int)r != r))
                        goto add_slow;
                    sp[-2] = JS_NewInt32(ctx, r);
                    sp--;
                } else if (JS_VALUE_IS_BOTH_FLOAT(op1, op2)) {
                    sp[-2] = __JS_NewFloat64(ctx, JS_VALUE_GET_FLOAT64(op1) +
                                             JS_VALUE_GET_FLOAT64(op2));
                    sp--;
                } else {
                add_slow:
                    if (js_add_slow(ctx, sp))
                        goto exception;
                    sp--;
                }
            }
            BREAK;
        CASE(OP_add_loc):
            {
                JSValue *pv;
                int idx;
                idx = *pc;
                pc += 1;

                pv = &var_buf[idx];
                if (js_likely(JS_VALUE_IS_BOTH_INT(*pv, sp[-1]))) {
                    int64_t r;
                    r = (int64_t)JS_VALUE_GET_INT(*pv) +
                        JS_VALUE_GET_INT(sp[-1]);
                    if (js_unlikely((int)r != r))
                        goto add_loc_slow;
                    *pv = JS_NewInt32(ctx, r);
                    sp--;
                } else if (JS_VALUE_GET_TAG(*pv) == JS_TAG_STRING) {
                    JSValue op1;
                    op1 = sp[-1];
                    sp--;
                    op1 = JS_ToPrimitiveFree(ctx, op1, HINT_NONE);
                    if (JS_IsException(op1))
                        goto exception;
                    op1 = JS_ConcatString(ctx, JS_DupValue(ctx, *pv), op1);
                    if (JS_IsException(op1))
                        goto exception;
                    set_value(ctx, pv, op1);
                } else {
                add_loc_slow:
                    /* In case of exception, js_add_slow frees ops[0]
                       and ops[1], so we must duplicate *pv */
                    JSValue ops[2];
                    ops[0] = JS_DupValue(ctx, *pv);
                    ops[1] = sp[-1];
                    sp--;
                    if (js_add_slow(ctx, ops + 2))
                        goto exception;
                    set_value(ctx, pv, ops[0]);
                }
            }
            BREAK;
        CASE(OP_sub):
            {
                JSValue op1, op2;
                op1 = sp[-2];
                op2 = sp[-1];
                if (js_likely(JS_VALUE_IS_BOTH_INT(op1, op2))) {
                    int64_t r;
                    r = (int64_t)JS_VALUE_GET_INT(op1) - JS_VALUE_GET_INT(op2);
                    if (js_unlikely((int)r != r))
                        goto binary_arith_slow;
                    sp[-2] = JS_NewInt32(ctx, r);
                    sp--;
                } else if (JS_VALUE_IS_BOTH_FLOAT(op1, op2)) {
                    sp[-2] = __JS_NewFloat64(ctx, JS_VALUE_GET_FLOAT64(op1) -
                                             JS_VALUE_GET_FLOAT64(op2));
                    sp--;
                } else {
                    goto binary_arith_slow;
                }
            }
            BREAK;
        CASE(OP_mul):
            {
                JSValue op1, op2;
                double d;
                op1 = sp[-2];
                op2 = sp[-1];
                if (js_likely(JS_VALUE_IS_BOTH_INT(op1, op2))) {
                    int32_t v1, v2;
                    int64_t r;
                    v1 = JS_VALUE_GET_INT(op1);
                    v2 = JS_VALUE_GET_INT(op2);
                    r = (int64_t)v1 * v2;
                    if (js_unlikely((int)r != r)) {
#ifdef CONFIG_BIGNUM
                        if (js_unlikely(sf->js_mode & JS_MODE_MATH) &&
                            (r < -MAX_SAFE_INTEGER || r > MAX_SAFE_INTEGER))
                            goto binary_arith_slow;
#endif
                        d = (double)r;
                        goto mul_fp_res;
                    }
                    /* need to test zero case for -0 result */
                    if (js_unlikely(r == 0 && (v1 | v2) < 0)) {
                        d = -0.0;
                        goto mul_fp_res;
                    }
                    sp[-2] = JS_NewInt32(ctx, r);
                    sp--;
                } else if (JS_VALUE_IS_BOTH_FLOAT(op1, op2)) {
#ifdef CONFIG_BIGNUM
                    if (js_unlikely(sf->js_mode & JS_MODE_MATH))
                        goto binary_arith_slow;
#endif
                    d = JS_VALUE_GET_FLOAT64(op1) * JS_VALUE_GET_FLOAT64(op2);
                mul_fp_res:
                    sp[-2] = __JS_NewFloat64(ctx, d);
                    sp--;
                } else {
                    goto binary_arith_slow;
                }
            }
            BREAK;
        CASE(OP_div):
            {
                JSValue op1, op2;
                op1 = sp[-2];
                op2 = sp[-1];
                if (js_likely(JS_VALUE_IS_BOTH_INT(op1, op2))) {
                    int v1, v2;
                    if (js_unlikely(sf->js_mode & JS_MODE_MATH))
                        goto binary_arith_slow;
                    v1 = JS_VALUE_GET_INT(op1);
                    v2 = JS_VALUE_GET_INT(op2);
                    sp[-2] = JS_NewFloat64(ctx, (double)v1 / (double)v2);
                    sp--;
                } else {
                    goto binary_arith_slow;
                }
            }
            BREAK;
        CASE(OP_mod):
#ifdef CONFIG_BIGNUM
        CASE(OP_math_mod):
#endif
            {
                JSValue op1, op2;
                op1 = sp[-2];
                op2 = sp[-1];
                if (js_likely(JS_VALUE_IS_BOTH_INT(op1, op2))) {
                    int v1, v2, r;
                    v1 = JS_VALUE_GET_INT(op1);
                    v2 = JS_VALUE_GET_INT(op2);
                    /* We must avoid v2 = 0, v1 = INT32_MIN and v2 =
                       -1 and the cases where the result is -0. */
                    if (js_unlikely(v1 < 0 || v2 <= 0))
                        goto binary_arith_slow;
                    r = v1 % v2;
                    sp[-2] = JS_NewInt32(ctx, r);
                    sp--;
                } else {
                    goto binary_arith_slow;
                }
            }
            BREAK;
        CASE(OP_pow):
        binary_arith_slow:
            if (js_binary_arith_slow(ctx, sp, opcode))
                goto exception;
            sp--;
            BREAK;

        CASE(OP_plus):
            {
                JSValue op1;
                uint32_t tag;
                op1 = sp[-1];
                tag = JS_VALUE_GET_TAG(op1);
                if (tag == JS_TAG_INT || JS_TAG_IS_FLOAT64(tag)) {
                } else {
                    if (js_unary_arith_slow(ctx, sp, opcode))
                        goto exception;
                }
            }
            BREAK;
        CASE(OP_neg):
            {
                JSValue op1;
                uint32_t tag;
                int val;
                double d;
                op1 = sp[-1];
                tag = JS_VALUE_GET_TAG(op1);
                if (tag == JS_TAG_INT) {
                    val = JS_VALUE_GET_INT(op1);
                    /* Note: -0 cannot be expressed as integer */
                    if (js_unlikely(val == 0)) {
                        d = -0.0;
                        goto neg_fp_res;
                    }
                    if (js_unlikely(val == INT32_MIN)) {
                        d = -(double)val;
                        goto neg_fp_res;
                    }
                    sp[-1] = JS_NewInt32(ctx, -val);
                } else if (JS_TAG_IS_FLOAT64(tag)) {
                    d = -JS_VALUE_GET_FLOAT64(op1);
                neg_fp_res:
                    sp[-1] = __JS_NewFloat64(ctx, d);
                } else {
                    if (js_unary_arith_slow(ctx, sp, opcode))
                        goto exception;
                }
            }
            BREAK;
        CASE(OP_inc):
            {
                JSValue op1;
                int val;
                op1 = sp[-1];
                if (JS_VALUE_GET_TAG(op1) == JS_TAG_INT) {
                    val = JS_VALUE_GET_INT(op1);
                    if (js_unlikely(val == INT32_MAX))
                        goto inc_slow;
                    sp[-1] = JS_NewInt32(ctx, val + 1);
                } else {
                inc_slow:
                    if (js_unary_arith_slow(ctx, sp, opcode))
                        goto exception;
                }
            }
            BREAK;
        CASE(OP_dec):
            {
                JSValue op1;
                int val;
                op1 = sp[-1];
                if (JS_VALUE_GET_TAG(op1) == JS_TAG_INT) {
                    val = JS_VALUE_GET_INT(op1);
                    if (js_unlikely(val == INT32_MIN))
                        goto dec_slow;
                    sp[-1] = JS_NewInt32(ctx, val - 1);
                } else {
                dec_slow:
                    if (js_unary_arith_slow(ctx, sp, opcode))
                        goto exception;
                }
            }
            BREAK;
        CASE(OP_post_inc):
        CASE(OP_post_dec):
            if (js_post_inc_slow(ctx, sp, opcode))
                goto exception;
            sp++;
            BREAK;
        CASE(OP_inc_loc):
            {
                JSValue op1;
                int val;
                int idx;
                idx = *pc;
                pc += 1;

                op1 = var_buf[idx];
                if (JS_VALUE_GET_TAG(op1) == JS_TAG_INT) {
                    val = JS_VALUE_GET_INT(op1);
                    if (js_unlikely(val == INT32_MAX))
                        goto inc_loc_slow;
                    var_buf[idx] = JS_NewInt32(ctx, val + 1);
                } else {
                inc_loc_slow:
                    /* must duplicate otherwise the variable value may
                       be destroyed before JS code accesses it */
                    op1 = JS_DupValue(ctx, op1);
                    if (js_unary_arith_slow(ctx, &op1 + 1, OP_inc))
                        goto exception;
                    set_value(ctx, &var_buf[idx], op1);
                }
            }
            BREAK;
        CASE(OP_dec_loc):
            {
                JSValue op1;
                int val;
                int idx;
                idx = *pc;
                pc += 1;

                op1 = var_buf[idx];
                if (JS_VALUE_GET_TAG(op1) == JS_TAG_INT) {
                    val = JS_VALUE_GET_INT(op1);
                    if (js_unlikely(val == INT32_MIN))
                        goto dec_loc_slow;
                    var_buf[idx] = JS_NewInt32(ctx, val - 1);
                } else {
                dec_loc_slow:
                    /* must duplicate otherwise the variable value may
                       be destroyed before JS code accesses it */
                    op1 = JS_DupValue(ctx, op1);
                    if (js_unary_arith_slow(ctx, &op1 + 1, OP_dec))
                        goto exception;
                    set_value(ctx, &var_buf[idx], op1);
                }
            }
            BREAK;
        CASE(OP_not):
            {
                JSValue op1;
                op1 = sp[-1];
                if (JS_VALUE_GET_TAG(op1) == JS_TAG_INT) {
                    sp[-1] = JS_NewInt32(ctx, ~JS_VALUE_GET_INT(op1));
                } else {
                    if (js_not_slow(ctx, sp))
                        goto exception;
                }
            }
            BREAK;

        CASE(OP_shl):
            {
                JSValue op1, op2;
                op1 = sp[-2];
                op2 = sp[-1];
                if (js_likely(JS_VALUE_IS_BOTH_INT(op1, op2))) {
                    uint32_t v1, v2;
                    v1 = JS_VALUE_GET_INT(op1);
                    v2 = JS_VALUE_GET_INT(op2);
#ifdef CONFIG_BIGNUM
                    {
                        int64_t r;
                        if (js_unlikely(sf->js_mode & JS_MODE_MATH)) {
                            if (v2 > 0x1f)
                                goto shl_slow;
                            r = (int64_t)v1 << v2;
                            if ((int)r != r)
                                goto shl_slow;
                        } else {
                            v2 &= 0x1f;
                        }
                    }
#else
                    v2 &= 0x1f;
#endif
                    sp[-2] = JS_NewInt32(ctx, v1 << v2);
                    sp--;
                } else {
#ifdef CONFIG_BIGNUM
                shl_slow:
#endif
                    if (js_binary_logic_slow(ctx, sp, opcode))
                        goto exception;
                    sp--;
                }
            }
            BREAK;
        CASE(OP_shr):
            {
                JSValue op1, op2;
                op1 = sp[-2];
                op2 = sp[-1];
                if (js_likely(JS_VALUE_IS_BOTH_INT(op1, op2))) {
                    uint32_t v2;
                    v2 = JS_VALUE_GET_INT(op2);
                    /* v1 >>> v2 retains its JS semantics if CONFIG_BIGNUM */
                    v2 &= 0x1f;
                    sp[-2] = JS_NewUint32(ctx,
                                          (uint32_t)JS_VALUE_GET_INT(op1) >>
                                          v2);
                    sp--;
                } else {
                    if (js_shr_slow(ctx, sp))
                        goto exception;
                    sp--;
                }
            }
            BREAK;
        CASE(OP_sar):
            {
                JSValue op1, op2;
                op1 = sp[-2];
                op2 = sp[-1];
                if (js_likely(JS_VALUE_IS_BOTH_INT(op1, op2))) {
                    uint32_t v2;
                    v2 = JS_VALUE_GET_INT(op2);
#ifdef CONFIG_BIGNUM
                    if (js_unlikely(v2 > 0x1f)) {
                        if (js_unlikely(sf->js_mode & JS_MODE_MATH))
                            goto sar_slow;
                        else
                            v2 &= 0x1f;
                    }
#else
                    v2 &= 0x1f;
#endif
                    sp[-2] = JS_NewInt32(ctx,
                                          (int)JS_VALUE_GET_INT(op1) >> v2);
                    sp--;
                } else {
#ifdef CONFIG_BIGNUM
                sar_slow:
#endif
                    if (js_binary_logic_slow(ctx, sp, opcode))
                        goto exception;
                    sp--;
                }
            }
            BREAK;
        CASE(OP_and):
            {
                JSValue op1, op2;
                op1 = sp[-2];
                op2 = sp[-1];
                if (js_likely(JS_VALUE_IS_BOTH_INT(op1, op2))) {
                    sp[-2] = JS_NewInt32(ctx,
                                         JS_VALUE_GET_INT(op1) &
                                         JS_VALUE_GET_INT(op2));
                    sp--;
                } else {
                    if (js_binary_logic_slow(ctx, sp, opcode))
                        goto exception;
                    sp--;
                }
            }
            BREAK;
        CASE(OP_or):
            {
                JSValue op1, op2;
                op1 = sp[-2];
                op2 = sp[-1];
                if (js_likely(JS_VALUE_IS_BOTH_INT(op1, op2))) {
                    sp[-2] = JS_NewInt32(ctx,
                                         JS_VALUE_GET_INT(op1) |
                                         JS_VALUE_GET_INT(op2));
                    sp--;
                } else {
                    if (js_binary_logic_slow(ctx, sp, opcode))
                        goto exception;
                    sp--;
                }
            }
            BREAK;
        CASE(OP_xor):
            {
                JSValue op1, op2;
                op1 = sp[-2];
                op2 = sp[-1];
                if (js_likely(JS_VALUE_IS_BOTH_INT(op1, op2))) {
                    sp[-2] = JS_NewInt32(ctx,
                                         JS_VALUE_GET_INT(op1) ^
                                         JS_VALUE_GET_INT(op2));
                    sp--;
                } else {
                    if (js_binary_logic_slow(ctx, sp, opcode))
                        goto exception;
                    sp--;
                }
            }
            BREAK;


#define OP_CMP(opcode, binary_op, slow_call)              \
            CASE(opcode):                                 \
                {                                         \
                JSValue op1, op2;                         \
                op1 = sp[-2];                             \
                op2 = sp[-1];                                   \
                if (js_likely(JS_VALUE_IS_BOTH_INT(op1, op2))) {           \
                    sp[-2] = JS_NewBool(ctx, JS_VALUE_GET_INT(op1) binary_op JS_VALUE_GET_INT(op2)); \
                    sp--;                                               \
                } else {                                                \
                    if (slow_call)                                      \
                        goto exception;                                 \
                    sp--;                                               \
                }                                                       \
                }                                                       \
            BREAK

            OP_CMP(OP_lt, <, js_relational_slow(ctx, sp, opcode));
            OP_CMP(OP_lte, <=, js_relational_slow(ctx, sp, opcode));
            OP_CMP(OP_gt, >, js_relational_slow(ctx, sp, opcode));
            OP_CMP(OP_gte, >=, js_relational_slow(ctx, sp, opcode));
            OP_CMP(OP_eq, ==, js_eq_slow(ctx, sp, 0));
            OP_CMP(OP_neq, !=, js_eq_slow(ctx, sp, 1));
            OP_CMP(OP_strict_eq, ==, js_strict_eq_slow(ctx, sp, 0));
            OP_CMP(OP_strict_neq, !=, js_strict_eq_slow(ctx, sp, 1));

#ifdef CONFIG_BIGNUM
        CASE(OP_mul_pow10):
            if (rt->bigfloat_ops.mul_pow10(ctx, sp))
                goto exception;
            sp--;
            BREAK;
#endif
        CASE(OP_in):
            if (js_operator_in(ctx, sp))
                goto exception;
            sp--;
            BREAK;
        CASE(OP_instanceof):
            if (js_operator_instanceof(ctx, sp))
                goto exception;
            sp--;
            BREAK;
        CASE(OP_typeof):
            {
                JSValue op1;
                JSAtom atom;

                op1 = sp[-1];
                atom = js_operator_typeof(ctx, op1);
                JS_FreeValue(ctx, op1);
                sp[-1] = JS_AtomToString(ctx, atom);
            }
            BREAK;
        CASE(OP_delete):
            if (js_operator_delete(ctx, sp))
                goto exception;
            sp--;
            BREAK;
        CASE(OP_delete_var):
            {
                JSAtom atom;
                int ret;

                atom = get_u32(pc);
                pc += 4;

                ret = JS_DeleteProperty(ctx, ctx->global_obj, atom, 0);
                if (js_unlikely(ret < 0))
                    goto exception;
                *sp++ = JS_NewBool(ctx, ret);
            }
            BREAK;

        CASE(OP_to_object):
            if (JS_VALUE_GET_TAG(sp[-1]) != JS_TAG_OBJECT) {
                ret_val = JS_ToObject(ctx, sp[-1]);
                if (JS_IsException(ret_val))
                    goto exception;
                JS_FreeValue(ctx, sp[-1]);
                sp[-1] = ret_val;
            }
            BREAK;

        CASE(OP_to_propkey):
            switch (JS_VALUE_GET_TAG(sp[-1])) {
            case JS_TAG_INT:
            case JS_TAG_STRING:
            case JS_TAG_SYMBOL:
                break;
            default:
                ret_val = JS_ToPropertyKey(ctx, sp[-1]);
                if (JS_IsException(ret_val))
                    goto exception;
                JS_FreeValue(ctx, sp[-1]);
                sp[-1] = ret_val;
                break;
            }
            BREAK;

        CASE(OP_to_propkey2):
            /* must be tested first */
            if (js_unlikely(JS_IsUndefined(sp[-2]) || JS_IsNull(sp[-2]))) {
                JS_ThrowTypeError(ctx, "value has no property");
                goto exception;
            }
            switch (JS_VALUE_GET_TAG(sp[-1])) {
            case JS_TAG_INT:
            case JS_TAG_STRING:
            case JS_TAG_SYMBOL:
                break;
            default:
                ret_val = JS_ToPropertyKey(ctx, sp[-1]);
                if (JS_IsException(ret_val))
                    goto exception;
                JS_FreeValue(ctx, sp[-1]);
                sp[-1] = ret_val;
                break;
            }
            BREAK;
#if 0
        CASE(OP_to_string):
            if (JS_VALUE_GET_TAG(sp[-1]) != JS_TAG_STRING) {
                ret_val = JS_ToString(ctx, sp[-1]);
                if (JS_IsException(ret_val))
                    goto exception;
                JS_FreeValue(ctx, sp[-1]);
                sp[-1] = ret_val;
            }
            BREAK;
#endif
        CASE(OP_with_get_var):
        CASE(OP_with_put_var):
        CASE(OP_with_delete_var):
        CASE(OP_with_make_ref):
        CASE(OP_with_get_ref):
        CASE(OP_with_get_ref_undef):
            {
                JSAtom atom;
                int32_t diff;
                JSValue obj, val;
                int ret, is_with;
                atom = get_u32(pc);
                diff = get_u32(pc + 4);
                is_with = pc[8];
                pc += 9;

                obj = sp[-1];
                ret = JS_HasProperty(ctx, obj, atom);
                if (js_unlikely(ret < 0))
                    goto exception;
                if (ret) {
                    if (is_with) {
                        ret = js_has_unscopable(ctx, obj, atom);
                        if (js_unlikely(ret < 0))
                            goto exception;
                        if (ret)
                            goto no_with;
                    }
                    switch (opcode) {
                    case OP_with_get_var:
                        val = JS_GetProperty(ctx, obj, atom);
                        if (js_unlikely(JS_IsException(val)))
                            goto exception;
                        set_value(ctx, &sp[-1], val);
                        break;
                    case OP_with_put_var:
                        /* XXX: check if strict mode */
                        ret = JS_SetPropertyInternal(ctx, obj, atom, sp[-2],
                                                     JS_PROP_THROW_STRICT);
                        JS_FreeValue(ctx, sp[-1]);
                        sp -= 2;
                        if (js_unlikely(ret < 0))
                            goto exception;
                        break;
                    case OP_with_delete_var:
                        ret = JS_DeleteProperty(ctx, obj, atom, 0);
                        if (js_unlikely(ret < 0))
                            goto exception;
                        JS_FreeValue(ctx, sp[-1]);
                        sp[-1] = JS_NewBool(ctx, ret);
                        break;
                    case OP_with_make_ref:
                        /* produce a pair object/propname on the stack */
                        *sp++ = JS_AtomToValue(ctx, atom);
                        break;
                    case OP_with_get_ref:
                        /* produce a pair object/method on the stack */
                        val = JS_GetProperty(ctx, obj, atom);
                        if (js_unlikely(JS_IsException(val)))
                            goto exception;
                        *sp++ = val;
                        break;
                    case OP_with_get_ref_undef:
                        /* produce a pair undefined/function on the stack */
                        val = JS_GetProperty(ctx, obj, atom);
                        if (js_unlikely(JS_IsException(val)))
                            goto exception;
                        JS_FreeValue(ctx, sp[-1]);
                        sp[-1] = JS_UNDEFINED;
                        *sp++ = val;
                        break;
                    }
                    pc += diff - 5;
                } else {
                no_with:
                    /* if not jumping, drop the object argument */
                    JS_FreeValue(ctx, sp[-1]);
                    sp--;
                }
            }
            BREAK;

        CASE(OP_await):
            ret_val = JS_NewInt32(ctx, FUNC_RET_AWAIT);
            goto done_generator;
        CASE(OP_yield):
            ret_val = JS_NewInt32(ctx, FUNC_RET_YIELD);
            goto done_generator;
        CASE(OP_yield_star):
        CASE(OP_async_yield_star):
            ret_val = JS_NewInt32(ctx, FUNC_RET_YIELD_STAR);
            goto done_generator;
        CASE(OP_return_async):
        CASE(OP_initial_yield):
            ret_val = JS_UNDEFINED;
            goto done_generator;

        CASE(OP_nop):
            BREAK;
        CASE(OP_is_undefined_or_null):
            if (JS_VALUE_GET_TAG(sp[-1]) == JS_TAG_UNDEFINED ||
                JS_VALUE_GET_TAG(sp[-1]) == JS_TAG_NULL) {
                goto set_true;
            } else {
                goto free_and_set_false;
            }
#if SHORT_OPCODES
        CASE(OP_is_undefined):
            if (JS_VALUE_GET_TAG(sp[-1]) == JS_TAG_UNDEFINED) {
                goto set_true;
            } else {
                goto free_and_set_false;
            }
        CASE(OP_is_null):
            if (JS_VALUE_GET_TAG(sp[-1]) == JS_TAG_NULL) {
                goto set_true;
            } else {
                goto free_and_set_false;
            }
            /* XXX: could merge to a single opcode */
        CASE(OP_typeof_is_undefined):
            /* different from OP_is_undefined because of isHTMLDDA */
            if (js_operator_typeof(ctx, sp[-1]) == JS_ATOM_undefined) {
                goto free_and_set_true;
            } else {
                goto free_and_set_false;
            }
        CASE(OP_typeof_is_function):
            if (js_operator_typeof(ctx, sp[-1]) == JS_ATOM_function) {
                goto free_and_set_true;
            } else {
                goto free_and_set_false;
            }
        free_and_set_true:
            JS_FreeValue(ctx, sp[-1]);
#endif
        set_true:
            sp[-1] = JS_TRUE;
            BREAK;
        free_and_set_false:
            JS_FreeValue(ctx, sp[-1]);
            sp[-1] = JS_FALSE;
            BREAK;
        CASE(OP_invalid):
        DEFAULT:
            JS_ThrowInternalError(ctx, "invalid opcode: pc=%u opcode=0x%02x",
                                  (int)(pc - b->byte_code_buf - 1), opcode);
            goto exception;
        }
    }
 exception:
    if (is_backtrace_needed(ctx, rt->current_exception)) {
        /* add the backtrace information now (it is not done
           before if the exception happens in a bytecode
           operation */
        sf->cur_pc = pc;
        build_backtrace(ctx, rt->current_exception, NULL, 0, 0);
    }
    if (!JS_IsUncatchableError(ctx, rt->current_exception)) {
        while (sp > stack_buf) {
            JSValue val = *--sp;
            JS_FreeValue(ctx, val);
            if (JS_VALUE_GET_TAG(val) == JS_TAG_CATCH_OFFSET) {
                int pos = JS_VALUE_GET_INT(val);
                if (pos == 0) {
                    /* enumerator: close it with a throw */
                    JS_FreeValue(ctx, sp[-1]); /* drop the next method */
                    sp--;
                    JS_IteratorClose(ctx, sp[-1], TRUE);
                } else {
                    *sp++ = rt->current_exception;
                    rt->current_exception = JS_NULL;
                    pc = b->byte_code_buf + pos;
                    goto restart;
                }
            }
        }
    }
    ret_val = JS_EXCEPTION;
    /* the local variables are freed by the caller in the generator
       case. Hence the label 'done' should never be reached in a
       generator function. */
    if (b->func_kind != JS_FUNC_NORMAL) {
    done_generator:
        sf->cur_pc = pc;
        sf->cur_sp = sp;
    } else {
    done:
        if (js_unlikely(!list_empty(&sf->var_ref_list))) {
            /* variable references reference the stack: must close them */
            close_var_refs(rt, sf);
        }
        /* free the local variables and stack */
        for(pval = local_buf; pval < sp; pval++) {
            JS_FreeValue(ctx, *pval);
        }
    }
    rt->current_stack_frame = sf->prev_frame;
    return ret_val;
}

inline JSValue JS_Call(JSContext *ctx, JSValueConst func_obj, JSValueConst this_obj,
                int argc, JSValueConst *argv)
{
    return JS_CallInternal(ctx, func_obj, this_obj, JS_UNDEFINED,
                           argc, (JSValue *)argv, JS_CALL_FLAG_COPY_ARGV);
}

static JSValue JS_CallFree(JSContext *ctx, JSValue func_obj, JSValueConst this_obj,
                           int argc, JSValueConst *argv)
{
    JSValue res = JS_CallInternal(ctx, func_obj, this_obj, JS_UNDEFINED,
                                  argc, (JSValue *)argv, JS_CALL_FLAG_COPY_ARGV);
    JS_FreeValue(ctx, func_obj);
    return res;
}

/* warning: the refcount of the context is not incremented. Return
   NULL in case of exception (case of revoked proxy only) */
static JSContext *JS_GetFunctionRealm(JSContext *ctx, JSValueConst func_obj)
{
    JSObject *p;
    JSContext *realm;

    if (JS_VALUE_GET_TAG(func_obj) != JS_TAG_OBJECT)
        return ctx;
    p = JS_VALUE_GET_OBJ(func_obj);
    switch(p->class_id) {
    case JS_CLASS_C_FUNCTION:
        realm = p->u.cfunc.realm;
        break;
    case JS_CLASS_BYTECODE_FUNCTION:
    case JS_CLASS_GENERATOR_FUNCTION:
    case JS_CLASS_ASYNC_FUNCTION:
    case JS_CLASS_ASYNC_GENERATOR_FUNCTION:
        {
            JSFunctionBytecode *b;
            b = p->u.func.function_bytecode;
            realm = b->realm;
        }
        break;
    case JS_CLASS_PROXY:
        {
            auto s = (JSProxyData*) p->u.opaque;
            if (!s)
                return ctx;
            if (s->is_revoked) {
                JS_ThrowTypeErrorRevokedProxy(ctx);
                return NULL;
            } else {
                realm = JS_GetFunctionRealm(ctx, s->target);
            }
        }
        break;
    case JS_CLASS_BOUND_FUNCTION:
        {
            JSBoundFunction *bf = p->u.bound_function;
            realm = JS_GetFunctionRealm(ctx, bf->func_obj);
        }
        break;
    default:
        realm = ctx;
        break;
    }
    return realm;
}

static JSValue js_create_from_ctor(JSContext *ctx, JSValueConst ctor,
                                   int class_id)
{
    JSValue proto, obj;
    JSContext *realm;

    if (JS_IsUndefined(ctor)) {
        proto = JS_DupValue(ctx, ctx->class_proto[class_id]);
    } else {
        proto = JS_GetProperty(ctx, ctor, JS_ATOM_prototype);
        if (JS_IsException(proto))
            return proto;
        if (!JS_IsObject(proto)) {
            JS_FreeValue(ctx, proto);
            realm = JS_GetFunctionRealm(ctx, ctor);
            if (!realm)
                return JS_EXCEPTION;
            proto = JS_DupValue(ctx, realm->class_proto[class_id]);
        }
    }
    obj = JS_NewObjectProtoClass(ctx, proto, class_id);
    JS_FreeValue(ctx, proto);
    return obj;
}

/* argv[] is modified if (flags & JS_CALL_FLAG_COPY_ARGV) = 0. */
static JSValue JS_CallConstructorInternal(JSContext *ctx,
                                          JSValueConst func_obj,
                                          JSValueConst new_target,
                                          int argc, JSValue *argv, int flags)
{
    JSObject *p;
    JSFunctionBytecode *b;

    if (js_poll_interrupts(ctx))
        return JS_EXCEPTION;
    flags |= JS_CALL_FLAG_CONSTRUCTOR;
    if (js_unlikely(JS_VALUE_GET_TAG(func_obj) != JS_TAG_OBJECT))
        goto not_a_function;
    p = JS_VALUE_GET_OBJ(func_obj);
    if (js_unlikely(!p->is_constructor))
        return JS_ThrowTypeError(ctx, "not a constructor");
    if (js_unlikely(p->class_id != JS_CLASS_BYTECODE_FUNCTION)) {
        JSClassCall *call_func;
        call_func = ctx->rt->class_array[p->class_id].call;
        if (!call_func) {
        not_a_function:
            return JS_ThrowTypeError(ctx, "not a function");
        }
        return call_func(ctx, func_obj, new_target, argc,
                         (JSValueConst *)argv, flags);
    }

    b = p->u.func.function_bytecode;
    if (b->is_derived_class_constructor) {
        return JS_CallInternal(ctx, func_obj, JS_UNDEFINED, new_target, argc, argv, flags);
    } else {
        JSValue obj, ret;
        /* legacy constructor behavior */
        obj = js_create_from_ctor(ctx, new_target, JS_CLASS_OBJECT);
        if (JS_IsException(obj))
            return JS_EXCEPTION;
        ret = JS_CallInternal(ctx, func_obj, obj, new_target, argc, argv, flags);
        if (JS_VALUE_GET_TAG(ret) == JS_TAG_OBJECT ||
            JS_IsException(ret)) {
            JS_FreeValue(ctx, obj);
            return ret;
        } else {
            JS_FreeValue(ctx, ret);
            return obj;
        }
    }
}

inline JSValue JS_CallConstructor2(JSContext *ctx, JSValueConst func_obj,
                            JSValueConst new_target,
                            int argc, JSValueConst *argv)
{
    return JS_CallConstructorInternal(ctx, func_obj, new_target,
                                      argc, (JSValue *)argv,
                                      JS_CALL_FLAG_COPY_ARGV);
}

inline JSValue JS_CallConstructor(JSContext *ctx, JSValueConst func_obj,
                           int argc, JSValueConst *argv)
{
    return JS_CallConstructorInternal(ctx, func_obj, func_obj,
                                      argc, (JSValue *)argv,
                                      JS_CALL_FLAG_COPY_ARGV);
}

inline JSValue JS_Invoke(JSContext *ctx, JSValueConst this_val, JSAtom atom,
                  int argc, JSValueConst *argv)
{
    JSValue func_obj;
    func_obj = JS_GetProperty(ctx, this_val, atom);
    if (JS_IsException(func_obj))
        return func_obj;
    return JS_CallFree(ctx, func_obj, this_val, argc, argv);
}

static JSValue JS_InvokeFree(JSContext *ctx, JSValue this_val, JSAtom atom,
                             int argc, JSValueConst *argv)
{
    JSValue res = JS_Invoke(ctx, this_val, atom, argc, argv);
    JS_FreeValue(ctx, this_val);
    return res;
}

/* JSAsyncFunctionState (used by generator and async functions) */
[[nodiscard]] static int async_func_init(JSContext *ctx, JSAsyncFunctionState *s,
                                       JSValueConst func_obj, JSValueConst this_obj,
                                       int argc, JSValueConst *argv)
{
    JSObject *p;
    JSFunctionBytecode *b;
    JSStackFrame *sf;
    int local_count, i, arg_buf_len, n;

    sf = &s->frame;
    init_list_head(&sf->var_ref_list);
    p = JS_VALUE_GET_OBJ(func_obj);
    b = p->u.func.function_bytecode;
    sf->js_mode = b->js_mode;
    sf->cur_pc = b->byte_code_buf;
    arg_buf_len = max_int(b->arg_count, argc);
    local_count = arg_buf_len + b->var_count + b->stack_size;
    sf->arg_buf = (JSValue*) js_malloc(ctx, sizeof(JSValue) * max_int(local_count, 1));
    if (!sf->arg_buf)
        return -1;
    sf->cur_func = JS_DupValue(ctx, func_obj);
    s->this_val = JS_DupValue(ctx, this_obj);
    s->argc = argc;
    sf->arg_count = arg_buf_len;
    sf->var_buf = sf->arg_buf + arg_buf_len;
    sf->cur_sp = sf->var_buf + b->var_count;
    for(i = 0; i < argc; i++)
        sf->arg_buf[i] = JS_DupValue(ctx, argv[i]);
    n = arg_buf_len + b->var_count;
    for(i = argc; i < n; i++)
        sf->arg_buf[i] = JS_UNDEFINED;
    return 0;
}

static void async_func_mark(JSRuntime *rt, JSAsyncFunctionState *s,
                            JS_MarkFunc *mark_func)
{
    JSStackFrame *sf;
    JSValue *sp;

    sf = &s->frame;
    JS_MarkValue(rt, sf->cur_func, mark_func);
    JS_MarkValue(rt, s->this_val, mark_func);
    if (sf->cur_sp) {
        /* if the function is running, cur_sp is not known so we
           cannot mark the stack. Marking the variables is not needed
           because a running function cannot be part of a removable
           cycle */
        for(sp = sf->arg_buf; sp < sf->cur_sp; sp++)
            JS_MarkValue(rt, *sp, mark_func);
    }
}

static void async_func_free(JSRuntime *rt, JSAsyncFunctionState *s)
{
    JSStackFrame *sf;
    JSValue *sp;

    sf = &s->frame;

    /* close the closure variables. */
    close_var_refs(rt, sf);

    if (sf->arg_buf) {
        /* cannot free the function if it is running */
        assert(sf->cur_sp != NULL);
        for(sp = sf->arg_buf; sp < sf->cur_sp; sp++) {
            JS_FreeValueRT(rt, *sp);
        }
        js_free_rt(rt, sf->arg_buf);
    }
    JS_FreeValueRT(rt, sf->cur_func);
    JS_FreeValueRT(rt, s->this_val);
}

static JSValue async_func_resume(JSContext *ctx, JSAsyncFunctionState *s)
{
    JSValue func_obj;

    if (js_check_stack_overflow(ctx->rt, 0))
        return JS_ThrowStackOverflow(ctx);

    /* the tag does not matter provided it is not an object */
    func_obj = JS_MKPTR(JS_TAG_INT, s);
    return JS_CallInternal(ctx, func_obj, s->this_val, JS_UNDEFINED,
                           s->argc, s->frame.arg_buf, JS_CALL_FLAG_GENERATOR);
}


/* Generators */

typedef enum JSGeneratorStateEnum {
    JS_GENERATOR_STATE_SUSPENDED_START,
    JS_GENERATOR_STATE_SUSPENDED_YIELD,
    JS_GENERATOR_STATE_SUSPENDED_YIELD_STAR,
    JS_GENERATOR_STATE_EXECUTING,
    JS_GENERATOR_STATE_COMPLETED,
} JSGeneratorStateEnum;

typedef struct JSGeneratorData {
    JSGeneratorStateEnum state;
    JSAsyncFunctionState func_state;
} JSGeneratorData;

static void free_generator_stack_rt(JSRuntime *rt, JSGeneratorData *s)
{
    if (s->state == JS_GENERATOR_STATE_COMPLETED)
        return;
    async_func_free(rt, &s->func_state);
    s->state = JS_GENERATOR_STATE_COMPLETED;
}

static void js_generator_finalizer(JSRuntime *rt, JSValue obj)
{
    auto s = (JSGeneratorData*) JS_GetOpaque(obj, JS_CLASS_GENERATOR);

    if (s) {
        free_generator_stack_rt(rt, s);
        js_free_rt(rt, s);
    }
}

static void free_generator_stack(JSContext *ctx, JSGeneratorData *s)
{
    free_generator_stack_rt(ctx->rt, s);
}

static void js_generator_mark(JSRuntime *rt, JSValueConst val,
                              JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSGeneratorData *s = p->u.generator_data;

    if (!s || s->state == JS_GENERATOR_STATE_COMPLETED)
        return;
    async_func_mark(rt, &s->func_state, mark_func);
}

/* XXX: use enum */
#define GEN_MAGIC_NEXT   0
#define GEN_MAGIC_RETURN 1
#define GEN_MAGIC_THROW  2

static JSValue js_generator_next(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv,
                                 BOOL *pdone, int magic)
{
    auto s = (JSGeneratorData*) JS_GetOpaque(this_val, JS_CLASS_GENERATOR);
    JSStackFrame *sf;
    JSValue ret, func_ret;

    *pdone = TRUE;
    if (!s)
        return JS_ThrowTypeError(ctx, "not a generator");
    sf = &s->func_state.frame;
    switch(s->state) {
    default:
    case JS_GENERATOR_STATE_SUSPENDED_START:
        if (magic == GEN_MAGIC_NEXT) {
            goto exec_no_arg;
        } else {
            free_generator_stack(ctx, s);
            goto done;
        }
        break;
    case JS_GENERATOR_STATE_SUSPENDED_YIELD_STAR:
    case JS_GENERATOR_STATE_SUSPENDED_YIELD:
        /* cur_sp[-1] was set to JS_UNDEFINED in the previous call */
        ret = JS_DupValue(ctx, argv[0]);
        if (magic == GEN_MAGIC_THROW &&
            s->state == JS_GENERATOR_STATE_SUSPENDED_YIELD) {
            JS_Throw(ctx, ret);
            s->func_state.throw_flag = TRUE;
        } else {
            sf->cur_sp[-1] = ret;
            sf->cur_sp[0] = JS_NewInt32(ctx, magic);
            sf->cur_sp++;
        exec_no_arg:
            s->func_state.throw_flag = FALSE;
        }
        s->state = JS_GENERATOR_STATE_EXECUTING;
        func_ret = async_func_resume(ctx, &s->func_state);
        s->state = JS_GENERATOR_STATE_SUSPENDED_YIELD;
        if (JS_IsException(func_ret)) {
            /* finalize the execution in case of exception */
            free_generator_stack(ctx, s);
            return func_ret;
        }
        if (JS_VALUE_GET_TAG(func_ret) == JS_TAG_INT) {
            /* get the returned yield value at the top of the stack */
            ret = sf->cur_sp[-1];
            sf->cur_sp[-1] = JS_UNDEFINED;
            if (JS_VALUE_GET_INT(func_ret) == FUNC_RET_YIELD_STAR) {
                s->state = JS_GENERATOR_STATE_SUSPENDED_YIELD_STAR;
                /* return (value, done) object */
                *pdone = 2;
            } else {
                *pdone = FALSE;
            }
        } else {
            /* end of iterator */
            ret = sf->cur_sp[-1];
            sf->cur_sp[-1] = JS_UNDEFINED;
            JS_FreeValue(ctx, func_ret);
            free_generator_stack(ctx, s);
        }
        break;
    case JS_GENERATOR_STATE_COMPLETED:
    done:
        /* execution is finished */
        switch(magic) {
        default:
        case GEN_MAGIC_NEXT:
            ret = JS_UNDEFINED;
            break;
        case GEN_MAGIC_RETURN:
            ret = JS_DupValue(ctx, argv[0]);
            break;
        case GEN_MAGIC_THROW:
            ret = JS_Throw(ctx, JS_DupValue(ctx, argv[0]));
            break;
        }
        break;
    case JS_GENERATOR_STATE_EXECUTING:
        ret = JS_ThrowTypeError(ctx, "cannot invoke a running generator");
        break;
    }
    return ret;
}

static JSValue js_generator_function_call(JSContext *ctx, JSValueConst func_obj,
                                          JSValueConst this_obj,
                                          int argc, JSValueConst *argv,
                                          int flags)
{
    JSValue obj, func_ret;
    JSGeneratorData *s;

    s = (JSGeneratorData*) js_mallocz(ctx, sizeof(*s));
    if (!s)
        return JS_EXCEPTION;
    s->state = JS_GENERATOR_STATE_SUSPENDED_START;
    if (async_func_init(ctx, &s->func_state, func_obj, this_obj, argc, argv)) {
        s->state = JS_GENERATOR_STATE_COMPLETED;
        goto fail;
    }

    /* execute the function up to 'OP_initial_yield' */
    func_ret = async_func_resume(ctx, &s->func_state);
    if (JS_IsException(func_ret))
        goto fail;
    JS_FreeValue(ctx, func_ret);

    obj = js_create_from_ctor(ctx, func_obj, JS_CLASS_GENERATOR);
    if (JS_IsException(obj))
        goto fail;
    JS_SetOpaque(obj, s);
    return obj;
 fail:
    free_generator_stack_rt(ctx->rt, s);
    js_free(ctx, s);
    return JS_EXCEPTION;
}

/* AsyncFunction */

static void js_async_function_terminate(JSRuntime *rt, JSAsyncFunctionData *s)
{
    if (s->is_active) {
        async_func_free(rt, &s->func_state);
        s->is_active = FALSE;
    }
}

static void js_async_function_free0(JSRuntime *rt, JSAsyncFunctionData *s)
{
    js_async_function_terminate(rt, s);
    JS_FreeValueRT(rt, s->resolving_funcs[0]);
    JS_FreeValueRT(rt, s->resolving_funcs[1]);
    remove_gc_object(&s->header);
    js_free_rt(rt, s);
}

static void js_async_function_free(JSRuntime *rt, JSAsyncFunctionData *s)
{
    if (--s->header.ref_count == 0) {
        js_async_function_free0(rt, s);
    }
}

static void js_async_function_resolve_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSAsyncFunctionData *s = p->u.async_function_data;
    if (s) {
        js_async_function_free(rt, s);
    }
}

static void js_async_function_resolve_mark(JSRuntime *rt, JSValueConst val,
                                           JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSAsyncFunctionData *s = p->u.async_function_data;
    if (s) {
        mark_func(rt, &s->header);
    }
}

static int js_async_function_resolve_create(JSContext *ctx,
                                            JSAsyncFunctionData *s,
                                            JSValue *resolving_funcs)
{
    int i;
    JSObject *p;

    for(i = 0; i < 2; i++) {
        resolving_funcs[i] =
            JS_NewObjectProtoClass(ctx, ctx->function_proto,
                                   JS_CLASS_ASYNC_FUNCTION_RESOLVE + i);
        if (JS_IsException(resolving_funcs[i])) {
            if (i == 1)
                JS_FreeValue(ctx, resolving_funcs[0]);
            return -1;
        }
        p = JS_VALUE_GET_OBJ(resolving_funcs[i]);
        s->header.ref_count++;
        p->u.async_function_data = s;
    }
    return 0;
}

static void js_async_function_resume(JSContext *ctx, JSAsyncFunctionData *s)
{
    JSValue func_ret, ret2;

    func_ret = async_func_resume(ctx, &s->func_state);
    if (JS_IsException(func_ret)) {
        JSValue error;
    fail:
        error = JS_GetException(ctx);
        ret2 = JS_Call(ctx, s->resolving_funcs[1], JS_UNDEFINED,
                       1, (JSValueConst *)&error);
        JS_FreeValue(ctx, error);
        js_async_function_terminate(ctx->rt, s);
        JS_FreeValue(ctx, ret2); /* XXX: what to do if exception ? */
    } else {
        JSValue value;
        value = s->func_state.frame.cur_sp[-1];
        s->func_state.frame.cur_sp[-1] = JS_UNDEFINED;
        if (JS_IsUndefined(func_ret)) {
            /* function returned */
            ret2 = JS_Call(ctx, s->resolving_funcs[0], JS_UNDEFINED,
                           1, (JSValueConst *)&value);
            JS_FreeValue(ctx, ret2); /* XXX: what to do if exception ? */
            JS_FreeValue(ctx, value);
            js_async_function_terminate(ctx->rt, s);
        } else {
            JSValue promise, resolving_funcs[2], resolving_funcs1[2];
            int i, res;

            /* await */
            JS_FreeValue(ctx, func_ret); /* not used */
            promise = js_promise_resolve(ctx, ctx->promise_ctor,
                                         1, (JSValueConst *)&value, 0);
            JS_FreeValue(ctx, value);
            if (JS_IsException(promise))
                goto fail;
            if (js_async_function_resolve_create(ctx, s, resolving_funcs)) {
                JS_FreeValue(ctx, promise);
                goto fail;
            }

            /* Note: no need to create 'thrownawayCapability' as in
               the spec */
            for(i = 0; i < 2; i++)
                resolving_funcs1[i] = JS_UNDEFINED;
            res = perform_promise_then(ctx, promise,
                                       (JSValueConst *)resolving_funcs,
                                       (JSValueConst *)resolving_funcs1);
            JS_FreeValue(ctx, promise);
            for(i = 0; i < 2; i++)
                JS_FreeValue(ctx, resolving_funcs[i]);
            if (res)
                goto fail;
        }
    }
}

static JSValue js_async_function_resolve_call(JSContext *ctx,
                                              JSValueConst func_obj,
                                              JSValueConst this_obj,
                                              int argc, JSValueConst *argv,
                                              int flags)
{
    JSObject *p = JS_VALUE_GET_OBJ(func_obj);
    JSAsyncFunctionData *s = p->u.async_function_data;
    BOOL is_reject = p->class_id - JS_CLASS_ASYNC_FUNCTION_RESOLVE;
    JSValueConst arg;

    if (argc > 0)
        arg = argv[0];
    else
        arg = JS_UNDEFINED;
    s->func_state.throw_flag = is_reject;
    if (is_reject) {
        JS_Throw(ctx, JS_DupValue(ctx, arg));
    } else {
        /* return value of await */
        s->func_state.frame.cur_sp[-1] = JS_DupValue(ctx, arg);
    }
    js_async_function_resume(ctx, s);
    return JS_UNDEFINED;
}

static JSValue js_async_function_call(JSContext *ctx, JSValueConst func_obj,
                                      JSValueConst this_obj,
                                      int argc, JSValueConst *argv, int flags)
{
    JSValue promise;
    JSAsyncFunctionData *s;

    s = (JSAsyncFunctionData*) js_mallocz(ctx, sizeof(*s));
    if (!s)
        return JS_EXCEPTION;
    s->header.ref_count = 1;
    add_gc_object(ctx->rt, &s->header, JS_GC_OBJ_TYPE_ASYNC_FUNCTION);
    s->is_active = FALSE;
    s->resolving_funcs[0] = JS_UNDEFINED;
    s->resolving_funcs[1] = JS_UNDEFINED;

    promise = JS_NewPromiseCapability(ctx, s->resolving_funcs);
    if (JS_IsException(promise))
        goto fail;

    if (async_func_init(ctx, &s->func_state, func_obj, this_obj, argc, argv)) {
    fail:
        JS_FreeValue(ctx, promise);
        js_async_function_free(ctx->rt, s);
        return JS_EXCEPTION;
    }
    s->is_active = TRUE;

    js_async_function_resume(ctx, s);

    js_async_function_free(ctx->rt, s);

    return promise;
}

/* AsyncGenerator */

typedef enum JSAsyncGeneratorStateEnum {
    JS_ASYNC_GENERATOR_STATE_SUSPENDED_START,
    JS_ASYNC_GENERATOR_STATE_SUSPENDED_YIELD,
    JS_ASYNC_GENERATOR_STATE_SUSPENDED_YIELD_STAR,
    JS_ASYNC_GENERATOR_STATE_EXECUTING,
    JS_ASYNC_GENERATOR_STATE_AWAITING_RETURN,
    JS_ASYNC_GENERATOR_STATE_COMPLETED,
} JSAsyncGeneratorStateEnum;

typedef struct JSAsyncGeneratorRequest {
    struct list_head link;
    /* completion */
    int completion_type; /* GEN_MAGIC_x */
    JSValue result;
    /* promise capability */
    JSValue promise;
    JSValue resolving_funcs[2];
} JSAsyncGeneratorRequest;

typedef struct JSAsyncGeneratorData {
    JSObject *generator; /* back pointer to the object (const) */
    JSAsyncGeneratorStateEnum state;
    JSAsyncFunctionState func_state;
    struct list_head queue; /* list of JSAsyncGeneratorRequest.link */
} JSAsyncGeneratorData;

static void js_async_generator_free(JSRuntime *rt,
                                    JSAsyncGeneratorData *s)
{
    struct list_head *el, *el1;
    JSAsyncGeneratorRequest *req;

    list_for_each_safe(el, el1, &s->queue) {
        req = list_entry(el, JSAsyncGeneratorRequest, link);
        JS_FreeValueRT(rt, req->result);
        JS_FreeValueRT(rt, req->promise);
        JS_FreeValueRT(rt, req->resolving_funcs[0]);
        JS_FreeValueRT(rt, req->resolving_funcs[1]);
        js_free_rt(rt, req);
    }
    if (s->state != JS_ASYNC_GENERATOR_STATE_COMPLETED &&
        s->state != JS_ASYNC_GENERATOR_STATE_AWAITING_RETURN) {
        async_func_free(rt, &s->func_state);
    }
    js_free_rt(rt, s);
}

static void js_async_generator_finalizer(JSRuntime *rt, JSValue obj)
{
    auto s = (JSAsyncGeneratorData*) JS_GetOpaque(obj, JS_CLASS_ASYNC_GENERATOR);

    if (s) {
        js_async_generator_free(rt, s);
    }
}

static void js_async_generator_mark(JSRuntime *rt, JSValueConst val,
                                    JS_MarkFunc *mark_func)
{
    auto s = (JSAsyncGeneratorData*) JS_GetOpaque(val, JS_CLASS_ASYNC_GENERATOR);
    struct list_head *el;
    JSAsyncGeneratorRequest *req;
    if (s) {
        list_for_each(el, &s->queue) {
            req = list_entry(el, JSAsyncGeneratorRequest, link);
            JS_MarkValue(rt, req->result, mark_func);
            JS_MarkValue(rt, req->promise, mark_func);
            JS_MarkValue(rt, req->resolving_funcs[0], mark_func);
            JS_MarkValue(rt, req->resolving_funcs[1], mark_func);
        }
        if (s->state != JS_ASYNC_GENERATOR_STATE_COMPLETED &&
            s->state != JS_ASYNC_GENERATOR_STATE_AWAITING_RETURN) {
            async_func_mark(rt, &s->func_state, mark_func);
        }
    }
}

static JSValue js_async_generator_resolve_function(JSContext *ctx,
                                          JSValueConst this_obj,
                                          int argc, JSValueConst *argv,
                                          int magic, JSValue *func_data);

static int js_async_generator_resolve_function_create(JSContext *ctx,
                                                      JSValueConst generator,
                                                      JSValue *resolving_funcs,
                                                      BOOL is_resume_next)
{
    int i;
    JSValue func;

    for(i = 0; i < 2; i++) {
        func = JS_NewCFunctionData(ctx, js_async_generator_resolve_function, 1,
                                   i + is_resume_next * 2, 1, &generator);
        if (JS_IsException(func)) {
            if (i == 1)
                JS_FreeValue(ctx, resolving_funcs[0]);
            return -1;
        }
        resolving_funcs[i] = func;
    }
    return 0;
}

static int js_async_generator_await(JSContext *ctx,
                                    JSAsyncGeneratorData *s,
                                    JSValueConst value)
{
    JSValue promise, resolving_funcs[2], resolving_funcs1[2];
    int i, res;

    promise = js_promise_resolve(ctx, ctx->promise_ctor,
                                 1, &value, 0);
    if (JS_IsException(promise))
        goto fail;

    if (js_async_generator_resolve_function_create(ctx, JS_MKPTR(JS_TAG_OBJECT, s->generator),
                                                   resolving_funcs, FALSE)) {
        JS_FreeValue(ctx, promise);
        goto fail;
    }

    /* Note: no need to create 'thrownawayCapability' as in
       the spec */
    for(i = 0; i < 2; i++)
        resolving_funcs1[i] = JS_UNDEFINED;
    res = perform_promise_then(ctx, promise,
                               (JSValueConst *)resolving_funcs,
                               (JSValueConst *)resolving_funcs1);
    JS_FreeValue(ctx, promise);
    for(i = 0; i < 2; i++)
        JS_FreeValue(ctx, resolving_funcs[i]);
    if (res)
        goto fail;
    return 0;
 fail:
    return -1;
}

static void js_async_generator_resolve_or_reject(JSContext *ctx,
                                                 JSAsyncGeneratorData *s,
                                                 JSValueConst result,
                                                 int is_reject)
{
    JSAsyncGeneratorRequest *next;
    JSValue ret;

    next = list_entry(s->queue.next, JSAsyncGeneratorRequest, link);
    list_del(&next->link);
    ret = JS_Call(ctx, next->resolving_funcs[is_reject], JS_UNDEFINED, 1,
                  &result);
    JS_FreeValue(ctx, ret);
    JS_FreeValue(ctx, next->result);
    JS_FreeValue(ctx, next->promise);
    JS_FreeValue(ctx, next->resolving_funcs[0]);
    JS_FreeValue(ctx, next->resolving_funcs[1]);
    js_free(ctx, next);
}

static void js_async_generator_resolve(JSContext *ctx,
                                       JSAsyncGeneratorData *s,
                                       JSValueConst value,
                                       BOOL done)
{
    JSValue result;
    result = js_create_iterator_result(ctx, JS_DupValue(ctx, value), done);
    /* XXX: better exception handling ? */
    js_async_generator_resolve_or_reject(ctx, s, result, 0);
    JS_FreeValue(ctx, result);
 }

static void js_async_generator_reject(JSContext *ctx,
                                       JSAsyncGeneratorData *s,
                                       JSValueConst exception)
{
    js_async_generator_resolve_or_reject(ctx, s, exception, 1);
}

static void js_async_generator_complete(JSContext *ctx,
                                        JSAsyncGeneratorData *s)
{
    if (s->state != JS_ASYNC_GENERATOR_STATE_COMPLETED) {
        s->state = JS_ASYNC_GENERATOR_STATE_COMPLETED;
        async_func_free(ctx->rt, &s->func_state);
    }
}

static int js_async_generator_completed_return(JSContext *ctx,
                                               JSAsyncGeneratorData *s,
                                               JSValueConst value)
{
    JSValue promise, resolving_funcs[2], resolving_funcs1[2];
    int res;

    promise = js_promise_resolve(ctx, ctx->promise_ctor,
                                 1, (JSValueConst *)&value, 0);
    if (JS_IsException(promise))
        return -1;
    if (js_async_generator_resolve_function_create(ctx,
                                                   JS_MKPTR(JS_TAG_OBJECT, s->generator),
                                                   resolving_funcs1,
                                                   TRUE)) {
        JS_FreeValue(ctx, promise);
        return -1;
    }
    resolving_funcs[0] = JS_UNDEFINED;
    resolving_funcs[1] = JS_UNDEFINED;
    res = perform_promise_then(ctx, promise,
                               (JSValueConst *)resolving_funcs1,
                               (JSValueConst *)resolving_funcs);
    JS_FreeValue(ctx, resolving_funcs1[0]);
    JS_FreeValue(ctx, resolving_funcs1[1]);
    JS_FreeValue(ctx, promise);
    return res;
}

static void js_async_generator_resume_next(JSContext *ctx,
                                           JSAsyncGeneratorData *s)
{
    JSAsyncGeneratorRequest *next;
    JSValue func_ret, value;

    for(;;) {
        if (list_empty(&s->queue))
            break;
        next = list_entry(s->queue.next, JSAsyncGeneratorRequest, link);
        switch(s->state) {
        case JS_ASYNC_GENERATOR_STATE_EXECUTING:
            /* only happens when restarting execution after await() */
            goto resume_exec;
        case JS_ASYNC_GENERATOR_STATE_AWAITING_RETURN:
            goto done;
        case JS_ASYNC_GENERATOR_STATE_SUSPENDED_START:
            if (next->completion_type == GEN_MAGIC_NEXT) {
                goto exec_no_arg;
            } else {
                js_async_generator_complete(ctx, s);
            }
            break;
        case JS_ASYNC_GENERATOR_STATE_COMPLETED:
            if (next->completion_type == GEN_MAGIC_NEXT) {
                js_async_generator_resolve(ctx, s, JS_UNDEFINED, TRUE);
            } else if (next->completion_type == GEN_MAGIC_RETURN) {
                s->state = JS_ASYNC_GENERATOR_STATE_AWAITING_RETURN;
                js_async_generator_completed_return(ctx, s, next->result);
                goto done;
            } else {
                js_async_generator_reject(ctx, s, next->result);
            }
            goto done;
        case JS_ASYNC_GENERATOR_STATE_SUSPENDED_YIELD:
        case JS_ASYNC_GENERATOR_STATE_SUSPENDED_YIELD_STAR:
            value = JS_DupValue(ctx, next->result);
            if (next->completion_type == GEN_MAGIC_THROW &&
                s->state == JS_ASYNC_GENERATOR_STATE_SUSPENDED_YIELD) {
                JS_Throw(ctx, value);
                s->func_state.throw_flag = TRUE;
            } else {
                /* 'yield' returns a value. 'yield *' also returns a value
                   in case the 'throw' method is called */
                s->func_state.frame.cur_sp[-1] = value;
                s->func_state.frame.cur_sp[0] =
                    JS_NewInt32(ctx, next->completion_type);
                s->func_state.frame.cur_sp++;
            exec_no_arg:
                s->func_state.throw_flag = FALSE;
            }
            s->state = JS_ASYNC_GENERATOR_STATE_EXECUTING;
        resume_exec:
            func_ret = async_func_resume(ctx, &s->func_state);
            if (JS_IsException(func_ret)) {
                value = JS_GetException(ctx);
                js_async_generator_complete(ctx, s);
                js_async_generator_reject(ctx, s, value);
                JS_FreeValue(ctx, value);
            } else if (JS_VALUE_GET_TAG(func_ret) == JS_TAG_INT) {
                int func_ret_code;
                value = s->func_state.frame.cur_sp[-1];
                s->func_state.frame.cur_sp[-1] = JS_UNDEFINED;
                func_ret_code = JS_VALUE_GET_INT(func_ret);
                switch(func_ret_code) {
                case FUNC_RET_YIELD:
                case FUNC_RET_YIELD_STAR:
                    if (func_ret_code == FUNC_RET_YIELD_STAR)
                        s->state = JS_ASYNC_GENERATOR_STATE_SUSPENDED_YIELD_STAR;
                    else
                        s->state = JS_ASYNC_GENERATOR_STATE_SUSPENDED_YIELD;
                    js_async_generator_resolve(ctx, s, value, FALSE);
                    JS_FreeValue(ctx, value);
                    break;
                case FUNC_RET_AWAIT:
                    js_async_generator_await(ctx, s, value);
                    JS_FreeValue(ctx, value);
                    goto done;
                default:
                    abort();
                }
            } else {
                assert(JS_IsUndefined(func_ret));
                /* end of function */
                value = s->func_state.frame.cur_sp[-1];
                s->func_state.frame.cur_sp[-1] = JS_UNDEFINED;
                js_async_generator_complete(ctx, s);
                js_async_generator_resolve(ctx, s, value, TRUE);
                JS_FreeValue(ctx, value);
            }
            break;
        default:
            abort();
        }
    }
 done: ;
}

static JSValue js_async_generator_resolve_function(JSContext *ctx,
                                                   JSValueConst this_obj,
                                                   int argc, JSValueConst *argv,
                                                   int magic, JSValue *func_data)
{
    BOOL is_reject = magic & 1;
    auto s = (JSAsyncGeneratorData*) JS_GetOpaque(func_data[0], JS_CLASS_ASYNC_GENERATOR);
    JSValueConst arg = argv[0];

    /* XXX: what if s == NULL */

    if (magic >= 2) {
        /* resume next case in AWAITING_RETURN state */
        assert(s->state == JS_ASYNC_GENERATOR_STATE_AWAITING_RETURN ||
               s->state == JS_ASYNC_GENERATOR_STATE_COMPLETED);
        s->state = JS_ASYNC_GENERATOR_STATE_COMPLETED;
        if (is_reject) {
            js_async_generator_reject(ctx, s, arg);
        } else {
            js_async_generator_resolve(ctx, s, arg, TRUE);
        }
    } else {
        /* restart function execution after await() */
        assert(s->state == JS_ASYNC_GENERATOR_STATE_EXECUTING);
        s->func_state.throw_flag = is_reject;
        if (is_reject) {
            JS_Throw(ctx, JS_DupValue(ctx, arg));
        } else {
            /* return value of await */
            s->func_state.frame.cur_sp[-1] = JS_DupValue(ctx, arg);
        }
        js_async_generator_resume_next(ctx, s);
    }
    return JS_UNDEFINED;
}

/* magic = GEN_MAGIC_x */
static JSValue js_async_generator_next(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv,
                                       int magic)
{
    auto s = (JSAsyncGeneratorData*) JS_GetOpaque(this_val, JS_CLASS_ASYNC_GENERATOR);
    JSValue promise, resolving_funcs[2];
    JSAsyncGeneratorRequest *req;

    promise = JS_NewPromiseCapability(ctx, resolving_funcs);
    if (JS_IsException(promise))
        return JS_EXCEPTION;
    if (!s) {
        JSValue err, res2;
        JS_ThrowTypeError(ctx, "not an AsyncGenerator object");
        err = JS_GetException(ctx);
        res2 = JS_Call(ctx, resolving_funcs[1], JS_UNDEFINED,
                       1, (JSValueConst *)&err);
        JS_FreeValue(ctx, err);
        JS_FreeValue(ctx, res2);
        JS_FreeValue(ctx, resolving_funcs[0]);
        JS_FreeValue(ctx, resolving_funcs[1]);
        return promise;
    }
    req = (JSAsyncGeneratorRequest*) js_mallocz(ctx, sizeof(*req));
    if (!req)
        goto fail;
    req->completion_type = magic;
    req->result = JS_DupValue(ctx, argv[0]);
    req->promise = JS_DupValue(ctx, promise);
    req->resolving_funcs[0] = resolving_funcs[0];
    req->resolving_funcs[1] = resolving_funcs[1];
    list_add_tail(&req->link, &s->queue);
    if (s->state != JS_ASYNC_GENERATOR_STATE_EXECUTING) {
        js_async_generator_resume_next(ctx, s);
    }
    return promise;
 fail:
    JS_FreeValue(ctx, resolving_funcs[0]);
    JS_FreeValue(ctx, resolving_funcs[1]);
    JS_FreeValue(ctx, promise);
    return JS_EXCEPTION;
}

static JSValue js_async_generator_function_call(JSContext *ctx, JSValueConst func_obj,
                                                JSValueConst this_obj,
                                                int argc, JSValueConst *argv,
                                                int flags)
{
    JSValue obj, func_ret;
    JSAsyncGeneratorData *s;

    s = (JSAsyncGeneratorData*) js_mallocz(ctx, sizeof(*s));
    if (!s)
        return JS_EXCEPTION;
    s->state = JS_ASYNC_GENERATOR_STATE_SUSPENDED_START;
    init_list_head(&s->queue);
    if (async_func_init(ctx, &s->func_state, func_obj, this_obj, argc, argv)) {
        s->state = JS_ASYNC_GENERATOR_STATE_COMPLETED;
        goto fail;
    }

    /* execute the function up to 'OP_initial_yield' (no yield nor
       await are possible) */
    func_ret = async_func_resume(ctx, &s->func_state);
    if (JS_IsException(func_ret))
        goto fail;
    JS_FreeValue(ctx, func_ret);

    obj = js_create_from_ctor(ctx, func_obj, JS_CLASS_ASYNC_GENERATOR);
    if (JS_IsException(obj))
        goto fail;
    s->generator = JS_VALUE_GET_OBJ(obj);
    JS_SetOpaque(obj, s);
    return obj;
 fail:
    js_async_generator_free(ctx->rt, s);
    return JS_EXCEPTION;
}

/* JS parser */

enum {
    TOK_NUMBER = -128,
    TOK_STRING,
    TOK_TEMPLATE,
    TOK_IDENT,
    TOK_REGEXP,
    /* warning: order matters (see js_parse_assign_expr) */
    TOK_MUL_ASSIGN,
    TOK_DIV_ASSIGN,
    TOK_MOD_ASSIGN,
    TOK_PLUS_ASSIGN,
    TOK_MINUS_ASSIGN,
    TOK_SHL_ASSIGN,
    TOK_SAR_ASSIGN,
    TOK_SHR_ASSIGN,
    TOK_AND_ASSIGN,
    TOK_XOR_ASSIGN,
    TOK_OR_ASSIGN,
#ifdef CONFIG_BIGNUM
    TOK_MATH_POW_ASSIGN,
#endif
    TOK_POW_ASSIGN,
    TOK_LAND_ASSIGN,
    TOK_LOR_ASSIGN,
    TOK_DOUBLE_QUESTION_MARK_ASSIGN,
    TOK_DEC,
    TOK_INC,
    TOK_SHL,
    TOK_SAR,
    TOK_SHR,
    TOK_LT,
    TOK_LTE,
    TOK_GT,
    TOK_GTE,
    TOK_EQ,
    TOK_STRICT_EQ,
    TOK_NEQ,
    TOK_STRICT_NEQ,
    TOK_LAND,
    TOK_LOR,
#ifdef CONFIG_BIGNUM
    TOK_MATH_POW,
#endif
    TOK_POW,
    TOK_ARROW,
    TOK_ELLIPSIS,
    TOK_DOUBLE_QUESTION_MARK,
    TOK_QUESTION_MARK_DOT,
    TOK_ERROR,
    TOK_PRIVATE_NAME,
    TOK_EOF,
    /* keywords: WARNING: same order as atoms */
    TOK_NULL, /* must be first */
    TOK_FALSE,
    TOK_TRUE,
    TOK_IF,
    TOK_ELSE,
    TOK_RETURN,
    TOK_VAR,
    TOK_THIS,
    TOK_DELETE,
    TOK_VOID,
    TOK_TYPEOF,
    TOK_NEW,
    TOK_IN,
    TOK_INSTANCEOF,
    TOK_DO,
    TOK_WHILE,
    TOK_FOR,
    TOK_BREAK,
    TOK_CONTINUE,
    TOK_SWITCH,
    TOK_CASE,
    TOK_DEFAULT,
    TOK_THROW,
    TOK_TRY,
    TOK_CATCH,
    TOK_FINALLY,
    TOK_FUNCTION,
    TOK_DEBUGGER,
    TOK_WITH,
    /* FutureReservedWord */
    TOK_CLASS,
    TOK_CONST,
    TOK_ENUM,
    TOK_EXPORT,
    TOK_EXTENDS,
    TOK_IMPORT,
    TOK_SUPER,
    /* FutureReservedWords when parsing strict mode code */
    TOK_IMPLEMENTS,
    TOK_INTERFACE,
    TOK_LET,
    TOK_PACKAGE,
    TOK_PRIVATE,
    TOK_PROTECTED,
    TOK_PUBLIC,
    TOK_STATIC,
    TOK_YIELD,
    TOK_AWAIT, /* must be last */
    TOK_OF,     /* only used for js_parse_skip_parens_token() */
};

#define TOK_FIRST_KEYWORD   TOK_NULL
#define TOK_LAST_KEYWORD    TOK_AWAIT

/* unicode code points */
#define CP_NBSP 0x00a0
#define CP_BOM  0xfeff

#define CP_LS   0x2028
#define CP_PS   0x2029

typedef struct BlockEnv {
    struct BlockEnv *prev;
    JSAtom label_name; /* JS_ATOM_NULL if none */
    int label_break; /* -1 if none */
    int label_cont; /* -1 if none */
    int drop_count; /* number of stack elements to drop */
    int label_finally; /* -1 if none */
    int scope_level;
    int has_iterator;
} BlockEnv;

typedef struct JSGlobalVar {
    int cpool_idx; /* if >= 0, index in the constant pool for hoisted
                      function defintion*/
    uint8_t force_init : 1; /* force initialization to undefined */
    uint8_t is_lexical : 1; /* global let/const definition */
    uint8_t is_const   : 1; /* const definition */
    int scope_level;    /* scope of definition */
    JSAtom var_name;  /* variable name */
} JSGlobalVar;

typedef struct RelocEntry {
    struct RelocEntry *next;
    uint32_t addr; /* address to patch */
    int size;   /* address size: 1, 2 or 4 bytes */
} RelocEntry;

typedef struct JumpSlot {
    int op;
    int size;
    int pos;
    int label;
} JumpSlot;

typedef struct LabelSlot {
    int ref_count;
    int pos;    /* phase 1 address, -1 means not resolved yet */
    int pos2;   /* phase 2 address, -1 means not resolved yet */
    int addr;   /* phase 3 address, -1 means not resolved yet */
    RelocEntry *first_reloc;
} LabelSlot;

typedef struct LineNumberSlot {
    uint32_t pc;
    int line_num;
} LineNumberSlot;

typedef enum JSParseFunctionEnum {
    JS_PARSE_FUNC_STATEMENT,
    JS_PARSE_FUNC_VAR,
    JS_PARSE_FUNC_EXPR,
    JS_PARSE_FUNC_ARROW,
    JS_PARSE_FUNC_GETTER,
    JS_PARSE_FUNC_SETTER,
    JS_PARSE_FUNC_METHOD,
    JS_PARSE_FUNC_CLASS_CONSTRUCTOR,
    JS_PARSE_FUNC_DERIVED_CLASS_CONSTRUCTOR,
} JSParseFunctionEnum;

typedef enum JSParseExportEnum {
    JS_PARSE_EXPORT_NONE,
    JS_PARSE_EXPORT_NAMED,
    JS_PARSE_EXPORT_DEFAULT,
} JSParseExportEnum;

typedef struct JSFunctionDef {
    JSContext *ctx;
    struct JSFunctionDef *parent;
    int parent_cpool_idx; /* index in the constant pool of the parent
                             or -1 if none */
    int parent_scope_level; /* scope level in parent at point of definition */
    struct list_head child_list; /* list of JSFunctionDef.link */
    struct list_head link;

    BOOL is_eval; /* TRUE if eval code */
    int eval_type; /* only valid if is_eval = TRUE */
    BOOL is_global_var; /* TRUE if variables are not defined locally:
                           eval global, eval module or non strict eval */
    BOOL is_func_expr; /* TRUE if function expression */
    BOOL has_home_object; /* TRUE if the home object is available */
    BOOL has_prototype; /* true if a prototype field is necessary */
    BOOL has_simple_parameter_list;
    BOOL has_parameter_expressions; /* if true, an argument scope is created */
    BOOL has_use_strict; /* to reject directive in special cases */
    BOOL has_eval_call; /* true if the function contains a call to eval() */
    BOOL has_arguments_binding; /* true if the 'arguments' binding is
                                   available in the function */
    BOOL has_this_binding; /* true if the 'this' and new.target binding are
                              available in the function */
    BOOL new_target_allowed; /* true if the 'new.target' does not
                                throw a syntax error */
    BOOL super_call_allowed; /* true if super() is allowed */
    BOOL super_allowed; /* true if super. or super[] is allowed */
    BOOL arguments_allowed; /* true if the 'arguments' identifier is allowed */
    BOOL is_derived_class_constructor;
    BOOL in_function_body;
    BOOL backtrace_barrier;
    JSFunctionKindEnum func_kind : 8;
    JSParseFunctionEnum func_type : 8;
    uint8_t js_mode; /* bitmap of JS_MODE_x */
    JSAtom func_name; /* JS_ATOM_NULL if no name */

    JSVarDef *vars;
    int var_size; /* allocated size for vars[] */
    int var_count;
    JSVarDef *args;
    int arg_size; /* allocated size for args[] */
    int arg_count; /* number of arguments */
    int defined_arg_count;
    int var_object_idx; /* -1 if none */
    int arg_var_object_idx; /* -1 if none (var object for the argument scope) */
    int arguments_var_idx; /* -1 if none */
    int arguments_arg_idx; /* argument variable definition in argument scope,
                              -1 if none */
    int func_var_idx; /* variable containing the current function (-1
                         if none, only used if is_func_expr is true) */
    int eval_ret_idx; /* variable containing the return value of the eval, -1 if none */
    int this_var_idx; /* variable containg the 'this' value, -1 if none */
    int new_target_var_idx; /* variable containg the 'new.target' value, -1 if none */
    int this_active_func_var_idx; /* variable containg the 'this.active_func' value, -1 if none */
    int home_object_var_idx;
    BOOL need_home_object;

    int scope_level;    /* index into fd->scopes if the current lexical scope */
    int scope_first;    /* index into vd->vars of first lexically scoped variable */
    int scope_size;     /* allocated size of fd->scopes array */
    int scope_count;    /* number of entries used in the fd->scopes array */
    JSVarScope *scopes;
    JSVarScope def_scope_array[4];
    int body_scope; /* scope of the body of the function or eval */

    int global_var_count;
    int global_var_size;
    JSGlobalVar *global_vars;

    DynBuf byte_code;
    int last_opcode_pos; /* -1 if no last opcode */
    int last_opcode_line_num;
    BOOL use_short_opcodes; /* true if short opcodes are used in byte_code */

    LabelSlot *label_slots;
    int label_size; /* allocated size for label_slots[] */
    int label_count;
    BlockEnv *top_break; /* break/continue label stack */

    /* constant pool (strings, functions, numbers) */
    JSValue *cpool;
    int cpool_count;
    int cpool_size;

    /* list of variables in the closure */
    int closure_var_count;
    int closure_var_size;
    JSClosureVar *closure_var;

    JumpSlot *jump_slots;
    int jump_size;
    int jump_count;

    LineNumberSlot *line_number_slots;
    int line_number_size;
    int line_number_count;
    int line_number_last;
    int line_number_last_pc;

    /* pc2line table */
    JSAtom filename;
    int line_num;
    DynBuf pc2line;

    char *source;  /* raw source, utf-8 encoded */
    int source_len;

    JSModuleDef *module; /* != NULL when parsing a module */
} JSFunctionDef;

typedef struct JSToken {
    int val;
    int line_num;   /* line number of token start */
    const uint8_t *ptr;
    union {
        struct {
            JSValue str;
            int sep;
        } str;
        struct {
            JSValue val;
#ifdef CONFIG_BIGNUM
            slimb_t exponent; /* may be != 0 only if val is a float */
#endif
        } num;
        struct {
            JSAtom atom;
            BOOL has_escape;
            BOOL is_reserved;
        } ident;
        struct {
            JSValue body;
            JSValue flags;
        } regexp;
    } u;
} JSToken;

typedef struct JSParseState {
    JSContext *ctx;
    int last_line_num;  /* line number of last token */
    int line_num;       /* line number of current offset */
    const char *filename;
    JSToken token;
    BOOL got_lf; /* true if got line feed before the current token */
    const uint8_t *last_ptr;
    const uint8_t *buf_ptr;
    const uint8_t *buf_end;

    /* current function code */
    JSFunctionDef *cur_func;
    BOOL is_module; /* parsing a module */
    BOOL allow_html_comments;
    BOOL ext_json; /* true if accepting JSON superset */
} JSParseState;

typedef struct JSOpCode {
#ifdef DUMP_BYTECODE
    const char *name;
#endif
    uint8_t size; /* in bytes */
    /* the opcodes remove n_pop items from the top of the stack, then
       pushes n_push items */
    uint8_t n_pop;
    uint8_t n_push;
    uint8_t fmt;
} JSOpCode;

static const JSOpCode opcode_info[OP_COUNT + (OP_TEMP_END - OP_TEMP_START)] = {
#define FMT(f)
#ifdef DUMP_BYTECODE
#define DEF(id, size, n_pop, n_push, f) { #id, size, n_pop, n_push, OP_FMT_ ## f },
#else
#define DEF(id, size, n_pop, n_push, f) { size, n_pop, n_push, OP_FMT_ ## f },
#endif
QUICKJS_OPCODES(FMT, DEF, DEF)
#undef DEF
#undef FMT
};

#if SHORT_OPCODES
/* After the final compilation pass, short opcodes are used. Their
   opcodes overlap with the temporary opcodes which cannot appear in
   the final bytecode. Their description is after the temporary
   opcodes in opcode_info[]. */
#define short_opcode_info(op)           \
    opcode_info[(op) >= OP_TEMP_START ? \
                (op) + (OP_TEMP_END - OP_TEMP_START) : (op)]
#else
#define short_opcode_info(op) opcode_info[op]
#endif

[[nodiscard]] static int next_token(JSParseState *s);

static void free_token(JSParseState *s, JSToken *token)
{
    switch(token->val) {
#ifdef CONFIG_BIGNUM
    case TOK_NUMBER:
        JS_FreeValue(s->ctx, token->u.num.val);
        break;
#endif
    case TOK_STRING:
    case TOK_TEMPLATE:
        JS_FreeValue(s->ctx, token->u.str.str);
        break;
    case TOK_REGEXP:
        JS_FreeValue(s->ctx, token->u.regexp.body);
        JS_FreeValue(s->ctx, token->u.regexp.flags);
        break;
    case TOK_IDENT:
    case TOK_PRIVATE_NAME:
        JS_FreeAtom(s->ctx, token->u.ident.atom);
        break;
    default:
        if (token->val >= TOK_FIRST_KEYWORD &&
            token->val <= TOK_LAST_KEYWORD) {
            JS_FreeAtom(s->ctx, token->u.ident.atom);
        }
        break;
    }
}

#if 0
static void dump_token(JSParseState *s, const JSToken *token)
{
    switch(token->val) {
    case TOK_NUMBER:
        {
            double d;
            JS_ToFloat64(s->ctx, &d, token->u.num.val);  /* no exception possible */
            printf("number: %.14g\n", d);
        }
        break;
    case TOK_IDENT:
    dump_atom:
        {
            char buf[ATOM_GET_STR_BUF_SIZE];
            printf("ident: '%s'\n",
                   JS_AtomGetStr(s->ctx, buf, sizeof(buf), token->u.ident.atom));
        }
        break;
    case TOK_STRING:
        {
            const char *str;
            /* XXX: quote the string */
            str = JS_ToCString(s->ctx, token->u.str.str);
            printf("string: '%s'\n", str);
            JS_FreeCString(s->ctx, str);
        }
        break;
    case TOK_TEMPLATE:
        {
            const char *str;
            str = JS_ToCString(s->ctx, token->u.str.str);
            printf("template: `%s`\n", str);
            JS_FreeCString(s->ctx, str);
        }
        break;
    case TOK_REGEXP:
        {
            const char *str, *str2;
            str = JS_ToCString(s->ctx, token->u.regexp.body);
            str2 = JS_ToCString(s->ctx, token->u.regexp.flags);
            printf("regexp: '%s' '%s'\n", str, str2);
            JS_FreeCString(s->ctx, str);
            JS_FreeCString(s->ctx, str2);
        }
        break;
    case TOK_EOF:
        printf("eof\n");
        break;
    default:
        if (s->token.val >= TOK_NULL && s->token.val <= TOK_LAST_KEYWORD) {
            goto dump_atom;
        } else if (s->token.val >= 256) {
            printf("token: %d\n", token->val);
        } else {
            printf("token: '%c'\n", token->val);
        }
        break;
    }
}
#endif

inline int js_parse_error(JSParseState *s, const char *fmt, ...)
{
    JSContext *ctx = s->ctx;
    va_list ap;
    int backtrace_flags;

    va_start(ap, fmt);
    JS_ThrowError2(ctx, JS_SYNTAX_ERROR, fmt, ap, FALSE);
    va_end(ap);
    backtrace_flags = 0;
    if (s->cur_func && s->cur_func->backtrace_barrier)
        backtrace_flags = JS_BACKTRACE_FLAG_SINGLE_LEVEL;
    build_backtrace(ctx, ctx->rt->current_exception, s->filename, s->line_num,
                    backtrace_flags);
    return -1;
}

static int js_parse_expect(JSParseState *s, int tok)
{
    if (s->token.val != tok) {
        /* XXX: dump token correctly in all cases */
        return js_parse_error(s, "expecting '%c'", tok);
    }
    return next_token(s);
}

static int js_parse_expect_semi(JSParseState *s)
{
    if (s->token.val != ';') {
        /* automatic insertion of ';' */
        if (s->token.val == TOK_EOF || s->token.val == '}' || s->got_lf) {
            return 0;
        }
        return js_parse_error(s, "expecting '%c'", ';');
    }
    return next_token(s);
}

static int js_parse_error_reserved_identifier(JSParseState *s)
{
    char buf1[ATOM_GET_STR_BUF_SIZE];
    return js_parse_error(s, "'%s' is a reserved identifier",
                          JS_AtomGetStr(s->ctx, buf1, sizeof(buf1),
                                        s->token.u.ident.atom));
}

[[nodiscard]] static int js_parse_template_part(JSParseState *s, const uint8_t *p)
{
    uint32_t c;
    StringBuffer b_s, *b = &b_s;

    /* p points to the first byte of the template part */
    if (string_buffer_init(s->ctx, b, 32))
        goto fail;
    for(;;) {
        if (p >= s->buf_end)
            goto unexpected_eof;
        c = *p++;
        if (c == '`') {
            /* template end part */
            break;
        }
        if (c == '$' && *p == '{') {
            /* template start or middle part */
            p++;
            break;
        }
        if (c == '\\') {
            if (string_buffer_putc8(b, c))
                goto fail;
            if (p >= s->buf_end)
                goto unexpected_eof;
            c = *p++;
        }
        /* newline sequences are normalized as single '\n' bytes */
        if (c == '\r') {
            if (*p == '\n')
                p++;
            c = '\n';
        }
        if (c == '\n') {
            s->line_num++;
        } else if (c >= 0x80) {
            const uint8_t *p_next;
            c = unicode_from_utf8(p - 1, UTF8_CHAR_LEN_MAX, &p_next);
            if (c > 0x10FFFF) {
                js_parse_error(s, "invalid UTF-8 sequence");
                goto fail;
            }
            p = p_next;
        }
        if (string_buffer_putc(b, c))
            goto fail;
    }
    s->token.val = TOK_TEMPLATE;
    s->token.u.str.sep = c;
    s->token.u.str.str = string_buffer_end(b);
    s->buf_ptr = p;
    return 0;

 unexpected_eof:
    js_parse_error(s, "unexpected end of string");
 fail:
    string_buffer_free(b);
    return -1;
}

[[nodiscard]] static int js_parse_string(JSParseState *s, int sep,
                                       BOOL do_throw, const uint8_t *p,
                                       JSToken *token, const uint8_t **pp)
{
    int ret;
    uint32_t c;
    StringBuffer b_s, *b = &b_s;

    /* string */
    if (string_buffer_init(s->ctx, b, 32))
        goto fail;
    for(;;) {
        if (p >= s->buf_end)
            goto invalid_char;
        c = *p;
        if (c < 0x20) {
            if (!s->cur_func) {
                if (do_throw)
                    js_parse_error(s, "invalid character in a JSON string");
                goto fail;
            }
            if (sep == '`') {
                if (c == '\r') {
                    if (p[1] == '\n')
                        p++;
                    c = '\n';
                }
                /* do not update s->line_num */
            } else if (c == '\n' || c == '\r')
                goto invalid_char;
        }
        p++;
        if (c == sep)
            break;
        if (c == '$' && *p == '{' && sep == '`') {
            /* template start or middle part */
            p++;
            break;
        }
        if (c == '\\') {
            c = *p;
            /* XXX: need a specific JSON case to avoid
               accepting invalid escapes */
            switch(c) {
            case '\0':
                if (p >= s->buf_end)
                    goto invalid_char;
                p++;
                break;
            case '\'':
            case '\"':
            case '\\':
                p++;
                break;
            case '\r':  /* accept DOS and MAC newline sequences */
                if (p[1] == '\n') {
                    p++;
                }
                /* fall thru */
            case '\n':
                /* ignore escaped newline sequence */
                p++;
                if (sep != '`')
                    s->line_num++;
                continue;
            default:
                if (c >= '0' && c <= '9') {
                    if (!s->cur_func)
                        goto invalid_escape; /* JSON case */
                    if (!(s->cur_func->js_mode & JS_MODE_STRICT) && sep != '`')
                        goto parse_escape;
                    if (c == '0' && !(p[1] >= '0' && p[1] <= '9')) {
                        p++;
                        c = '\0';
                    } else {
                        if (c >= '8' || sep == '`') {
                            /* Note: according to ES2021, \8 and \9 are not
                               accepted in strict mode or in templates. */
                            goto invalid_escape;
                        } else {
                            if (do_throw)
                                js_parse_error(s, "octal escape sequences are not allowed in strict mode");
                        }
                        goto fail;
                    }
                } else if (c >= 0x80) {
                    const uint8_t *p_next;
                    c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p_next);
                    if (c > 0x10FFFF) {
                        goto invalid_utf8;
                    }
                    p = p_next;
                    /* LS or PS are skipped */
                    if (c == CP_LS || c == CP_PS)
                        continue;
                } else {
                parse_escape:
                    ret = lre_parse_escape(&p, TRUE);
                    if (ret == -1) {
                    invalid_escape:
                        if (do_throw)
                            js_parse_error(s, "malformed escape sequence in string literal");
                        goto fail;
                    } else if (ret < 0) {
                        /* ignore the '\' (could output a warning) */
                        p++;
                    } else {
                        c = ret;
                    }
                }
                break;
            }
        } else if (c >= 0x80) {
            const uint8_t *p_next;
            c = unicode_from_utf8(p - 1, UTF8_CHAR_LEN_MAX, &p_next);
            if (c > 0x10FFFF)
                goto invalid_utf8;
            p = p_next;
        }
        if (string_buffer_putc(b, c))
            goto fail;
    }
    token->val = TOK_STRING;
    token->u.str.sep = c;
    token->u.str.str = string_buffer_end(b);
    *pp = p;
    return 0;

 invalid_utf8:
    if (do_throw)
        js_parse_error(s, "invalid UTF-8 sequence");
    goto fail;
 invalid_char:
    if (do_throw)
        js_parse_error(s, "unexpected end of string");
 fail:
    string_buffer_free(b);
    return -1;
}

static inline BOOL token_is_pseudo_keyword(JSParseState *s, JSAtom atom) {
    return s->token.val == TOK_IDENT && s->token.u.ident.atom == atom &&
        !s->token.u.ident.has_escape;
}

[[nodiscard]] static int js_parse_regexp(JSParseState *s)
{
    const uint8_t *p;
    BOOL in_class;
    StringBuffer b_s, *b = &b_s;
    StringBuffer b2_s, *b2 = &b2_s;
    uint32_t c;

    p = s->buf_ptr;
    p++;
    in_class = FALSE;
    if (string_buffer_init(s->ctx, b, 32))
        return -1;
    if (string_buffer_init(s->ctx, b2, 1))
        goto fail;
    for(;;) {
        if (p >= s->buf_end) {
        eof_error:
            js_parse_error(s, "unexpected end of regexp");
            goto fail;
        }
        c = *p++;
        if (c == '\n' || c == '\r') {
            goto eol_error;
        } else if (c == '/') {
            if (!in_class)
                break;
        } else if (c == '[') {
            in_class = TRUE;
        } else if (c == ']') {
            /* XXX: incorrect as the first character in a class */
            in_class = FALSE;
        } else if (c == '\\') {
            if (string_buffer_putc8(b, c))
                goto fail;
            c = *p++;
            if (c == '\n' || c == '\r')
                goto eol_error;
            else if (c == '\0' && p >= s->buf_end)
                goto eof_error;
            else if (c >= 0x80) {
                const uint8_t *p_next;
                c = unicode_from_utf8(p - 1, UTF8_CHAR_LEN_MAX, &p_next);
                if (c > 0x10FFFF) {
                    goto invalid_utf8;
                }
                p = p_next;
                if (c == CP_LS || c == CP_PS)
                    goto eol_error;
            }
        } else if (c >= 0x80) {
            const uint8_t *p_next;
            c = unicode_from_utf8(p - 1, UTF8_CHAR_LEN_MAX, &p_next);
            if (c > 0x10FFFF) {
            invalid_utf8:
                js_parse_error(s, "invalid UTF-8 sequence");
                goto fail;
            }
            p = p_next;
            /* LS or PS are considered as line terminator */
            if (c == CP_LS || c == CP_PS) {
            eol_error:
                js_parse_error(s, "unexpected line terminator in regexp");
                goto fail;
            }
        }
        if (string_buffer_putc(b, c))
            goto fail;
    }

    /* flags */
    for(;;) {
        const uint8_t *p_next = p;
        c = *p_next++;
        if (c >= 0x80) {
            c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p_next);
            if (c > 0x10FFFF) {
                goto invalid_utf8;
            }
        }
        if (!lre_js_is_ident_next(c))
            break;
        if (string_buffer_putc(b2, c))
            goto fail;
        p = p_next;
    }

    s->token.val = TOK_REGEXP;
    s->token.u.regexp.body = string_buffer_end(b);
    s->token.u.regexp.flags = string_buffer_end(b2);
    s->buf_ptr = p;
    return 0;
 fail:
    string_buffer_free(b);
    string_buffer_free(b2);
    return -1;
}

[[nodiscard]] static int ident_realloc(JSContext *ctx, char **pbuf, size_t *psize,
                                     char *static_buf)
{
    char *buf, *new_buf;
    size_t size, new_size;

    buf = *pbuf;
    size = *psize;
    if (size >= (SIZE_MAX / 3) * 2)
        new_size = SIZE_MAX;
    else
        new_size = size + (size >> 1);
    if (buf == static_buf) {
        new_buf = (char*) js_malloc(ctx, new_size);
        if (!new_buf)
            return -1;
        memcpy(new_buf, buf, size);
    } else {
        new_buf = (char*) js_realloc(ctx, buf, new_size);
        if (!new_buf)
            return -1;
    }
    *pbuf = new_buf;
    *psize = new_size;
    return 0;
}

/* 'c' is the first character. Return JS_ATOM_NULL in case of error */
static JSAtom parse_ident(JSParseState *s, const uint8_t **pp,
                          BOOL *pident_has_escape, int c, BOOL is_private)
{
    const uint8_t *p, *p1;
    char ident_buf[128], *buf;
    size_t ident_size, ident_pos;
    JSAtom atom;

    p = *pp;
    buf = ident_buf;
    ident_size = sizeof(ident_buf);
    ident_pos = 0;
    if (is_private)
        buf[ident_pos++] = '#';
    for(;;) {
        p1 = p;

        if (c < 128) {
            buf[ident_pos++] = c;
        } else {
            ident_pos += unicode_to_utf8((uint8_t*)buf + ident_pos, c);
        }
        c = *p1++;
        if (c == '\\' && *p1 == 'u') {
            c = lre_parse_escape(&p1, TRUE);
            *pident_has_escape = TRUE;
        } else if (c >= 128) {
            c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p1);
        }
        if (!lre_js_is_ident_next(c))
            break;
        p = p1;
        if (js_unlikely(ident_pos >= ident_size - UTF8_CHAR_LEN_MAX)) {
            if (ident_realloc(s->ctx, &buf, &ident_size, ident_buf)) {
                atom = JS_ATOM_NULL;
                goto done;
            }
        }
    }
    atom = JS_NewAtomLen(s->ctx, buf, ident_pos);
 done:
    if (js_unlikely(buf != ident_buf))
        js_free(s->ctx, buf);
    *pp = p;
    return atom;
}


[[nodiscard]] static int next_token(JSParseState *s)
{
    const uint8_t *p;
    int c;
    BOOL ident_has_escape;
    JSAtom atom;

    if (js_check_stack_overflow(s->ctx->rt, 0)) {
        return js_parse_error(s, "stack overflow");
    }

    free_token(s, &s->token);

    p = s->last_ptr = s->buf_ptr;
    s->got_lf = FALSE;
    s->last_line_num = s->token.line_num;
 redo:
    s->token.line_num = s->line_num;
    s->token.ptr = p;
    c = *p;
    switch(c) {
    case 0:
        if (p >= s->buf_end) {
            s->token.val = TOK_EOF;
        } else {
            goto def_token;
        }
        break;
    case '`':
        if (js_parse_template_part(s, p + 1))
            goto fail;
        p = s->buf_ptr;
        break;
    case '\'':
    case '\"':
        if (js_parse_string(s, c, TRUE, p + 1, &s->token, &p))
            goto fail;
        break;
    case '\r':  /* accept DOS and MAC newline sequences */
        if (p[1] == '\n') {
            p++;
        }
        /* fall thru */
    case '\n':
        p++;
    line_terminator:
        s->got_lf = TRUE;
        s->line_num++;
        goto redo;
    case '\f':
    case '\v':
    case ' ':
    case '\t':
        p++;
        goto redo;
    case '/':
        if (p[1] == '*') {
            /* comment */
            p += 2;
            for(;;) {
                if (*p == '\0' && p >= s->buf_end) {
                    js_parse_error(s, "unexpected end of comment");
                    goto fail;
                }
                if (p[0] == '*' && p[1] == '/') {
                    p += 2;
                    break;
                }
                if (*p == '\n') {
                    s->line_num++;
                    s->got_lf = TRUE; /* considered as LF for ASI */
                    p++;
                } else if (*p == '\r') {
                    s->got_lf = TRUE; /* considered as LF for ASI */
                    p++;
                } else if (*p >= 0x80) {
                    c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p);
                    if (c == CP_LS || c == CP_PS) {
                        s->got_lf = TRUE; /* considered as LF for ASI */
                    } else if (c == -1) {
                        p++; /* skip invalid UTF-8 */
                    }
                } else {
                    p++;
                }
            }
            goto redo;
        } else if (p[1] == '/') {
            /* line comment */
            p += 2;
        skip_line_comment:
            for(;;) {
                if (*p == '\0' && p >= s->buf_end)
                    break;
                if (*p == '\r' || *p == '\n')
                    break;
                if (*p >= 0x80) {
                    c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p);
                    /* LS or PS are considered as line terminator */
                    if (c == CP_LS || c == CP_PS) {
                        break;
                    } else if (c == -1) {
                        p++; /* skip invalid UTF-8 */
                    }
                } else {
                    p++;
                }
            }
            goto redo;
        } else if (p[1] == '=') {
            p += 2;
            s->token.val = TOK_DIV_ASSIGN;
        } else {
            p++;
            s->token.val = c;
        }
        break;
    case '\\':
        if (p[1] == 'u') {
            const uint8_t *p1 = p + 1;
            int c1 = lre_parse_escape(&p1, TRUE);
            if (c1 >= 0 && lre_js_is_ident_first(c1)) {
                c = c1;
                p = p1;
                ident_has_escape = TRUE;
                goto has_ident;
            } else {
                /* XXX: syntax error? */
            }
        }
        goto def_token;
    case 'a': case 'b': case 'c': case 'd':
    case 'e': case 'f': case 'g': case 'h':
    case 'i': case 'j': case 'k': case 'l':
    case 'm': case 'n': case 'o': case 'p':
    case 'q': case 'r': case 's': case 't':
    case 'u': case 'v': case 'w': case 'x':
    case 'y': case 'z':
    case 'A': case 'B': case 'C': case 'D':
    case 'E': case 'F': case 'G': case 'H':
    case 'I': case 'J': case 'K': case 'L':
    case 'M': case 'N': case 'O': case 'P':
    case 'Q': case 'R': case 'S': case 'T':
    case 'U': case 'V': case 'W': case 'X':
    case 'Y': case 'Z':
    case '_':
    case '$':
        /* identifier */
        p++;
        ident_has_escape = FALSE;
    has_ident:
        atom = parse_ident(s, &p, &ident_has_escape, c, FALSE);
        if (atom == JS_ATOM_NULL)
            goto fail;
        s->token.u.ident.atom = atom;
        s->token.u.ident.has_escape = ident_has_escape;
        s->token.u.ident.is_reserved = FALSE;
        if (s->token.u.ident.atom <= JS_ATOM_LAST_KEYWORD ||
            (s->token.u.ident.atom <= JS_ATOM_LAST_STRICT_KEYWORD &&
             (s->cur_func->js_mode & JS_MODE_STRICT)) ||
            (s->token.u.ident.atom == JS_ATOM_yield &&
             ((s->cur_func->func_kind & JS_FUNC_GENERATOR) ||
              (s->cur_func->func_type == JS_PARSE_FUNC_ARROW &&
               !s->cur_func->in_function_body && s->cur_func->parent &&
               (s->cur_func->parent->func_kind & JS_FUNC_GENERATOR)))) ||
            (s->token.u.ident.atom == JS_ATOM_await &&
             (s->is_module ||
              (((s->cur_func->func_kind & JS_FUNC_ASYNC) ||
                (s->cur_func->func_type == JS_PARSE_FUNC_ARROW &&
                 !s->cur_func->in_function_body && s->cur_func->parent &&
                 (s->cur_func->parent->func_kind & JS_FUNC_ASYNC))))))) {
                  if (ident_has_escape) {
                      s->token.u.ident.is_reserved = TRUE;
                      s->token.val = TOK_IDENT;
                  } else {
                      /* The keywords atoms are pre allocated */
                      s->token.val = s->token.u.ident.atom - 1 + TOK_FIRST_KEYWORD;
                  }
        } else {
            s->token.val = TOK_IDENT;
        }
        break;
    case '#':
        /* private name */
        {
            const uint8_t *p1;
            p++;
            p1 = p;
            c = *p1++;
            if (c == '\\' && *p1 == 'u') {
                c = lre_parse_escape(&p1, TRUE);
            } else if (c >= 128) {
                c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p1);
            }
            if (!lre_js_is_ident_first(c)) {
                js_parse_error(s, "invalid first character of private name");
                goto fail;
            }
            p = p1;
            ident_has_escape = FALSE; /* not used */
            atom = parse_ident(s, &p, &ident_has_escape, c, TRUE);
            if (atom == JS_ATOM_NULL)
                goto fail;
            s->token.u.ident.atom = atom;
            s->token.val = TOK_PRIVATE_NAME;
        }
        break;
    case '.':
        if (p[1] == '.' && p[2] == '.') {
            p += 3;
            s->token.val = TOK_ELLIPSIS;
            break;
        }
        if (p[1] >= '0' && p[1] <= '9') {
            goto parse_number;
        } else {
            goto def_token;
        }
        break;
    case '0':
        /* in strict mode, octal literals are not accepted */
        if (is_digit(p[1]) && (s->cur_func->js_mode & JS_MODE_STRICT)) {
            js_parse_error(s, "octal literals are deprecated in strict mode");
            goto fail;
        }
        goto parse_number;
    case '1': case '2': case '3': case '4':
    case '5': case '6': case '7': case '8':
    case '9':
        /* number */
    parse_number:
        {
            JSValue ret;
            const uint8_t *p1;
            int flags, radix;
            flags = ATOD_ACCEPT_BIN_OCT | ATOD_ACCEPT_LEGACY_OCTAL |
                ATOD_ACCEPT_UNDERSCORES;
#ifdef CONFIG_BIGNUM
            flags |= ATOD_ACCEPT_SUFFIX;
            if (s->cur_func->js_mode & JS_MODE_MATH) {
                flags |= ATOD_MODE_BIGINT;
                if (s->cur_func->js_mode & JS_MODE_MATH)
                    flags |= ATOD_TYPE_BIG_FLOAT;
            }
#endif
            radix = 0;
#ifdef CONFIG_BIGNUM
            s->token.u.num.exponent = 0;
            ret = js_atof2(s->ctx, (const char *)p, (const char **)&p, radix,
                           flags, &s->token.u.num.exponent);
#else
            ret = js_atof(s->ctx, (const char *)p, (const char **)&p, radix,
                          flags);
#endif
            if (JS_IsException(ret))
                goto fail;
            /* reject `10instanceof Number` */
            if (JS_VALUE_IS_NAN(ret) ||
                lre_js_is_ident_next(unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p1))) {
                JS_FreeValue(s->ctx, ret);
                js_parse_error(s, "invalid number literal");
                goto fail;
            }
            s->token.val = TOK_NUMBER;
            s->token.u.num.val = ret;
        }
        break;
    case '*':
        if (p[1] == '=') {
            p += 2;
            s->token.val = TOK_MUL_ASSIGN;
        } else if (p[1] == '*') {
            if (p[2] == '=') {
                p += 3;
                s->token.val = TOK_POW_ASSIGN;
            } else {
                p += 2;
                s->token.val = TOK_POW;
            }
        } else {
            goto def_token;
        }
        break;
    case '%':
        if (p[1] == '=') {
            p += 2;
            s->token.val = TOK_MOD_ASSIGN;
        } else {
            goto def_token;
        }
        break;
    case '+':
        if (p[1] == '=') {
            p += 2;
            s->token.val = TOK_PLUS_ASSIGN;
        } else if (p[1] == '+') {
            p += 2;
            s->token.val = TOK_INC;
        } else {
            goto def_token;
        }
        break;
    case '-':
        if (p[1] == '=') {
            p += 2;
            s->token.val = TOK_MINUS_ASSIGN;
        } else if (p[1] == '-') {
            if (s->allow_html_comments &&
                p[2] == '>' && s->last_line_num != s->line_num) {
                /* Annex B: `-->` at beginning of line is an html comment end.
                   It extends to the end of the line.
                 */
                goto skip_line_comment;
            }
            p += 2;
            s->token.val = TOK_DEC;
        } else {
            goto def_token;
        }
        break;
    case '<':
        if (p[1] == '=') {
            p += 2;
            s->token.val = TOK_LTE;
        } else if (p[1] == '<') {
            if (p[2] == '=') {
                p += 3;
                s->token.val = TOK_SHL_ASSIGN;
            } else {
                p += 2;
                s->token.val = TOK_SHL;
            }
        } else if (s->allow_html_comments &&
                   p[1] == '!' && p[2] == '-' && p[3] == '-') {
            /* Annex B: handle `<!--` single line html comments */
            goto skip_line_comment;
        } else {
            goto def_token;
        }
        break;
    case '>':
        if (p[1] == '=') {
            p += 2;
            s->token.val = TOK_GTE;
        } else if (p[1] == '>') {
            if (p[2] == '>') {
                if (p[3] == '=') {
                    p += 4;
                    s->token.val = TOK_SHR_ASSIGN;
                } else {
                    p += 3;
                    s->token.val = TOK_SHR;
                }
            } else if (p[2] == '=') {
                p += 3;
                s->token.val = TOK_SAR_ASSIGN;
            } else {
                p += 2;
                s->token.val = TOK_SAR;
            }
        } else {
            goto def_token;
        }
        break;
    case '=':
        if (p[1] == '=') {
            if (p[2] == '=') {
                p += 3;
                s->token.val = TOK_STRICT_EQ;
            } else {
                p += 2;
                s->token.val = TOK_EQ;
            }
        } else if (p[1] == '>') {
            p += 2;
            s->token.val = TOK_ARROW;
        } else {
            goto def_token;
        }
        break;
    case '!':
        if (p[1] == '=') {
            if (p[2] == '=') {
                p += 3;
                s->token.val = TOK_STRICT_NEQ;
            } else {
                p += 2;
                s->token.val = TOK_NEQ;
            }
        } else {
            goto def_token;
        }
        break;
    case '&':
        if (p[1] == '=') {
            p += 2;
            s->token.val = TOK_AND_ASSIGN;
        } else if (p[1] == '&') {
            if (p[2] == '=') {
                p += 3;
                s->token.val = TOK_LAND_ASSIGN;
            } else {
                p += 2;
                s->token.val = TOK_LAND;
            }
        } else {
            goto def_token;
        }
        break;
#ifdef CONFIG_BIGNUM
        /* in math mode, '^' is the power operator. '^^' is always the
           xor operator and '**' is always the power operator */
    case '^':
        if (p[1] == '=') {
            p += 2;
            if (s->cur_func->js_mode & JS_MODE_MATH)
                s->token.val = TOK_MATH_POW_ASSIGN;
            else
                s->token.val = TOK_XOR_ASSIGN;
        } else if (p[1] == '^') {
            if (p[2] == '=') {
                p += 3;
                s->token.val = TOK_XOR_ASSIGN;
            } else {
                p += 2;
                s->token.val = '^';
            }
        } else {
            p++;
            if (s->cur_func->js_mode & JS_MODE_MATH)
                s->token.val = TOK_MATH_POW;
            else
                s->token.val = '^';
        }
        break;
#else
    case '^':
        if (p[1] == '=') {
            p += 2;
            s->token.val = TOK_XOR_ASSIGN;
        } else {
            goto def_token;
        }
        break;
#endif
    case '|':
        if (p[1] == '=') {
            p += 2;
            s->token.val = TOK_OR_ASSIGN;
        } else if (p[1] == '|') {
            if (p[2] == '=') {
                p += 3;
                s->token.val = TOK_LOR_ASSIGN;
            } else {
                p += 2;
                s->token.val = TOK_LOR;
            }
        } else {
            goto def_token;
        }
        break;
    case '?':
        if (p[1] == '?') {
            if (p[2] == '=') {
                p += 3;
                s->token.val = TOK_DOUBLE_QUESTION_MARK_ASSIGN;
            } else {
                p += 2;
                s->token.val = TOK_DOUBLE_QUESTION_MARK;
            }
        } else if (p[1] == '.' && !(p[2] >= '0' && p[2] <= '9')) {
            p += 2;
            s->token.val = TOK_QUESTION_MARK_DOT;
        } else {
            goto def_token;
        }
        break;
    default:
        if (c >= 128) {
            /* unicode value */
            c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p);
            switch(c) {
            case CP_PS:
            case CP_LS:
                /* XXX: should avoid incrementing line_number, but
                   needed to handle HTML comments */
                goto line_terminator;
            default:
                if (lre_is_space(c)) {
                    goto redo;
                } else if (lre_js_is_ident_first(c)) {
                    ident_has_escape = FALSE;
                    goto has_ident;
                } else {
                    js_parse_error(s, "unexpected character");
                    goto fail;
                }
            }
        }
    def_token:
        s->token.val = c;
        p++;
        break;
    }
    s->buf_ptr = p;

    //    dump_token(s, &s->token);
    return 0;

 fail:
    s->token.val = TOK_ERROR;
    return -1;
}

/* 'c' is the first character. Return JS_ATOM_NULL in case of error */
static JSAtom json_parse_ident(JSParseState *s, const uint8_t **pp, int c)
{
    const uint8_t *p;
    char ident_buf[128], *buf;
    size_t ident_size, ident_pos;
    JSAtom atom;

    p = *pp;
    buf = ident_buf;
    ident_size = sizeof(ident_buf);
    ident_pos = 0;
    for(;;) {
        buf[ident_pos++] = c;
        c = *p;
        if (c >= 128 ||
            !((lre_id_continue_table_ascii[c >> 5] >> (c & 31)) & 1))
            break;
        p++;
        if (js_unlikely(ident_pos >= ident_size - UTF8_CHAR_LEN_MAX)) {
            if (ident_realloc(s->ctx, &buf, &ident_size, ident_buf)) {
                atom = JS_ATOM_NULL;
                goto done;
            }
        }
    }
    atom = JS_NewAtomLen(s->ctx, buf, ident_pos);
 done:
    if (js_unlikely(buf != ident_buf))
        js_free(s->ctx, buf);
    *pp = p;
    return atom;
}

[[nodiscard]] static int json_next_token(JSParseState *s)
{
    const uint8_t *p;
    int c;
    JSAtom atom;

    if (js_check_stack_overflow(s->ctx->rt, 0)) {
        return js_parse_error(s, "stack overflow");
    }

    free_token(s, &s->token);

    p = s->last_ptr = s->buf_ptr;
    s->last_line_num = s->token.line_num;
 redo:
    s->token.line_num = s->line_num;
    s->token.ptr = p;
    c = *p;
    switch(c) {
    case 0:
        if (p >= s->buf_end) {
            s->token.val = TOK_EOF;
        } else {
            goto def_token;
        }
        break;
    case '\'':
        if (!s->ext_json) {
            /* JSON does not accept single quoted strings */
            goto def_token;
        }
        /* fall through */
    case '\"':
        if (js_parse_string(s, c, TRUE, p + 1, &s->token, &p))
            goto fail;
        break;
    case '\r':  /* accept DOS and MAC newline sequences */
        if (p[1] == '\n') {
            p++;
        }
        /* fall thru */
    case '\n':
        p++;
        s->line_num++;
        goto redo;
    case '\f':
    case '\v':
        if (!s->ext_json) {
            /* JSONWhitespace does not match <VT>, nor <FF> */
            goto def_token;
        }
        /* fall through */
    case ' ':
    case '\t':
        p++;
        goto redo;
    case '/':
        if (!s->ext_json) {
            /* JSON does not accept comments */
            goto def_token;
        }
        if (p[1] == '*') {
            /* comment */
            p += 2;
            for(;;) {
                if (*p == '\0' && p >= s->buf_end) {
                    js_parse_error(s, "unexpected end of comment");
                    goto fail;
                }
                if (p[0] == '*' && p[1] == '/') {
                    p += 2;
                    break;
                }
                if (*p == '\n') {
                    s->line_num++;
                    p++;
                } else if (*p == '\r') {
                    p++;
                } else if (*p >= 0x80) {
                    c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p);
                    if (c == -1) {
                        p++; /* skip invalid UTF-8 */
                    }
                } else {
                    p++;
                }
            }
            goto redo;
        } else if (p[1] == '/') {
            /* line comment */
            p += 2;
            for(;;) {
                if (*p == '\0' && p >= s->buf_end)
                    break;
                if (*p == '\r' || *p == '\n')
                    break;
                if (*p >= 0x80) {
                    c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p);
                    /* LS or PS are considered as line terminator */
                    if (c == CP_LS || c == CP_PS) {
                        break;
                    } else if (c == -1) {
                        p++; /* skip invalid UTF-8 */
                    }
                } else {
                    p++;
                }
            }
            goto redo;
        } else {
            goto def_token;
        }
        break;
    case 'a': case 'b': case 'c': case 'd':
    case 'e': case 'f': case 'g': case 'h':
    case 'i': case 'j': case 'k': case 'l':
    case 'm': case 'n': case 'o': case 'p':
    case 'q': case 'r': case 's': case 't':
    case 'u': case 'v': case 'w': case 'x':
    case 'y': case 'z':
    case 'A': case 'B': case 'C': case 'D':
    case 'E': case 'F': case 'G': case 'H':
    case 'I': case 'J': case 'K': case 'L':
    case 'M': case 'N': case 'O': case 'P':
    case 'Q': case 'R': case 'S': case 'T':
    case 'U': case 'V': case 'W': case 'X':
    case 'Y': case 'Z':
    case '_':
    case '$':
        /* identifier : only pure ascii characters are accepted */
        p++;
        atom = json_parse_ident(s, &p, c);
        if (atom == JS_ATOM_NULL)
            goto fail;
        s->token.u.ident.atom = atom;
        s->token.u.ident.has_escape = FALSE;
        s->token.u.ident.is_reserved = FALSE;
        s->token.val = TOK_IDENT;
        break;
    case '+':
        if (!s->ext_json || !is_digit(p[1]))
            goto def_token;
        goto parse_number;
    case '0':
        if (is_digit(p[1]))
            goto def_token;
        goto parse_number;
    case '-':
        if (!is_digit(p[1]))
            goto def_token;
        goto parse_number;
    case '1': case '2': case '3': case '4':
    case '5': case '6': case '7': case '8':
    case '9':
        /* number */
    parse_number:
        {
            JSValue ret;
            int flags, radix;
            if (!s->ext_json) {
                flags = 0;
                radix = 10;
            } else {
                flags = ATOD_ACCEPT_BIN_OCT;
                radix = 0;
            }
            ret = js_atof(s->ctx, (const char *)p, (const char **)&p, radix,
                          flags);
            if (JS_IsException(ret))
                goto fail;
            s->token.val = TOK_NUMBER;
            s->token.u.num.val = ret;
        }
        break;
    default:
        if (c >= 128) {
            js_parse_error(s, "unexpected character");
            goto fail;
        }
    def_token:
        s->token.val = c;
        p++;
        break;
    }
    s->buf_ptr = p;

    //    dump_token(s, &s->token);
    return 0;

 fail:
    s->token.val = TOK_ERROR;
    return -1;
}

/* only used for ':' and '=>', 'let' or 'function' look-ahead. *pp is
   only set if TOK_IMPORT is returned */
/* XXX: handle all unicode cases */
static int simple_next_token(const uint8_t **pp, BOOL no_line_terminator)
{
    const uint8_t *p;
    uint32_t c;

    /* skip spaces and comments */
    p = *pp;
    for (;;) {
        switch(c = *p++) {
        case '\r':
        case '\n':
            if (no_line_terminator)
                return '\n';
            continue;
        case ' ':
        case '\t':
        case '\v':
        case '\f':
            continue;
        case '/':
            if (*p == '/') {
                if (no_line_terminator)
                    return '\n';
                while (*p && *p != '\r' && *p != '\n')
                    p++;
                continue;
            }
            if (*p == '*') {
                while (*++p) {
                    if ((*p == '\r' || *p == '\n') && no_line_terminator)
                        return '\n';
                    if (*p == '*' && p[1] == '/') {
                        p += 2;
                        break;
                    }
                }
                continue;
            }
            break;
        case '=':
            if (*p == '>')
                return TOK_ARROW;
            break;
        default:
            if (lre_js_is_ident_first(c)) {
                if (c == 'i') {
                    if (p[0] == 'n' && !lre_js_is_ident_next(p[1])) {
                        return TOK_IN;
                    }
                    if (p[0] == 'm' && p[1] == 'p' && p[2] == 'o' &&
                        p[3] == 'r' && p[4] == 't' &&
                        !lre_js_is_ident_next(p[5])) {
                        *pp = p + 5;
                        return TOK_IMPORT;
                    }
                } else if (c == 'o' && *p == 'f' && !lre_js_is_ident_next(p[1])) {
                    return TOK_OF;
                } else if (c == 'e' &&
                           p[0] == 'x' && p[1] == 'p' && p[2] == 'o' &&
                           p[3] == 'r' && p[4] == 't' &&
                           !lre_js_is_ident_next(p[5])) {
                    *pp = p + 5;
                    return TOK_EXPORT;
                } else if (c == 'f' && p[0] == 'u' && p[1] == 'n' &&
                         p[2] == 'c' && p[3] == 't' && p[4] == 'i' &&
                         p[5] == 'o' && p[6] == 'n' && !lre_js_is_ident_next(p[7])) {
                    return TOK_FUNCTION;
                }
                return TOK_IDENT;
            }
            break;
        }
        return c;
    }
}

static int peek_token(JSParseState *s, BOOL no_line_terminator)
{
    const uint8_t *p = s->buf_ptr;
    return simple_next_token(&p, no_line_terminator);
}

/* return true if 'input' contains the source of a module
   (heuristic). 'input' must be a zero terminated.

   Heuristic: skip comments and expect 'import' keyword not followed
   by '(' or '.' or export keyword.
*/
inline BOOL JS_DetectModule(const char *input, size_t input_len)
{
    const uint8_t *p = (const uint8_t *)input;
    int tok;
    switch(simple_next_token(&p, FALSE)) {
    case TOK_IMPORT:
        tok = simple_next_token(&p, FALSE);
        return (tok != '.' && tok != '(');
    case TOK_EXPORT:
        return TRUE;
    default:
        return FALSE;
    }
}

static inline int get_prev_opcode(JSFunctionDef *fd) {
    if (fd->last_opcode_pos < 0)
        return OP_invalid;
    else
        return fd->byte_code.buf[fd->last_opcode_pos];
}

static BOOL js_is_live_code(JSParseState *s) {
    switch (get_prev_opcode(s->cur_func)) {
    case OP_tail_call:
    case OP_tail_call_method:
    case OP_return:
    case OP_return_undef:
    case OP_return_async:
    case OP_throw:
    case OP_throw_error:
    case OP_goto:
#if SHORT_OPCODES
    case OP_goto8:
    case OP_goto16:
#endif
    case OP_ret:
        return FALSE;
    default:
        return TRUE;
    }
}

static void emit_u8(JSParseState *s, uint8_t val)
{
    dbuf_putc(&s->cur_func->byte_code, val);
}

static void emit_u16(JSParseState *s, uint16_t val)
{
    dbuf_put_u16(&s->cur_func->byte_code, val);
}

static void emit_u32(JSParseState *s, uint32_t val)
{
    dbuf_put_u32(&s->cur_func->byte_code, val);
}

static void emit_op(JSParseState *s, uint8_t val)
{
    JSFunctionDef *fd = s->cur_func;
    DynBuf *bc = &fd->byte_code;

    /* Use the line number of the last token used, not the next token,
       nor the current offset in the source file.
     */
    if (js_unlikely(fd->last_opcode_line_num != s->last_line_num)) {
        dbuf_putc(bc, OP_line_num);
        dbuf_put_u32(bc, s->last_line_num);
        fd->last_opcode_line_num = s->last_line_num;
    }
    fd->last_opcode_pos = bc->size;
    dbuf_putc(bc, val);
}

static void emit_atom(JSParseState *s, JSAtom name)
{
    emit_u32(s, JS_DupAtom(s->ctx, name));
}

static int update_label(JSFunctionDef *s, int label, int delta)
{
    LabelSlot *ls;

    assert(label >= 0 && label < s->label_count);
    ls = &s->label_slots[label];
    ls->ref_count += delta;
    assert(ls->ref_count >= 0);
    return ls->ref_count;
}

static int new_label_fd(JSFunctionDef *fd, int label)
{
    LabelSlot *ls;

    if (label < 0) {
        if (js_resize_array(fd->ctx, (void **)&fd->label_slots,
                            sizeof(fd->label_slots[0]),
                            &fd->label_size, fd->label_count + 1))
            return -1;
        label = fd->label_count++;
        ls = &fd->label_slots[label];
        ls->ref_count = 0;
        ls->pos = -1;
        ls->pos2 = -1;
        ls->addr = -1;
        ls->first_reloc = NULL;
    }
    return label;
}

static int new_label(JSParseState *s)
{
    return new_label_fd(s->cur_func, -1);
}

/* return the label ID offset */
static int emit_label(JSParseState *s, int label)
{
    if (label >= 0) {
        emit_op(s, OP_label);
        emit_u32(s, label);
        s->cur_func->label_slots[label].pos = s->cur_func->byte_code.size;
        return s->cur_func->byte_code.size - 4;
    } else {
        return -1;
    }
}

/* return label or -1 if dead code */
static int emit_goto(JSParseState *s, int opcode, int label)
{
    if (js_is_live_code(s)) {
        if (label < 0)
            label = new_label(s);
        emit_op(s, opcode);
        emit_u32(s, label);
        s->cur_func->label_slots[label].ref_count++;
        return label;
    }
    return -1;
}

/* return the constant pool index. 'val' is not duplicated. */
static int cpool_add(JSParseState *s, JSValue val)
{
    JSFunctionDef *fd = s->cur_func;

    if (js_resize_array(s->ctx, (void **)&fd->cpool, sizeof(fd->cpool[0]),
                        &fd->cpool_size, fd->cpool_count + 1))
        return -1;
    fd->cpool[fd->cpool_count++] = val;
    return fd->cpool_count - 1;
}

[[nodiscard]] static int emit_push_const(JSParseState *s, JSValueConst val,
                                       BOOL as_atom)
{
    int idx;

    if (JS_VALUE_GET_TAG(val) == JS_TAG_STRING && as_atom) {
        JSAtom atom;
        /* warning: JS_NewAtomStr frees the string value */
        JS_DupValue(s->ctx, val);
        atom = JS_NewAtomStr(s->ctx, JS_VALUE_GET_STRING(val));
        if (atom != JS_ATOM_NULL && !__JS_AtomIsTaggedInt(atom)) {
            emit_op(s, OP_push_atom_value);
            emit_u32(s, atom);
            return 0;
        }
    }

    idx = cpool_add(s, JS_DupValue(s->ctx, val));
    if (idx < 0)
        return -1;
    emit_op(s, OP_push_const);
    emit_u32(s, idx);
    return 0;
}

/* return the variable index or -1 if not found,
   add ARGUMENT_VAR_OFFSET for argument variables */
static int find_arg(JSContext *ctx, JSFunctionDef *fd, JSAtom name)
{
    int i;
    for(i = fd->arg_count; i-- > 0;) {
        if (fd->args[i].var_name == name)
            return i | ARGUMENT_VAR_OFFSET;
    }
    return -1;
}

static int find_var(JSContext *ctx, JSFunctionDef *fd, JSAtom name)
{
    int i;
    for(i = fd->var_count; i-- > 0;) {
        if (fd->vars[i].var_name == name && fd->vars[i].scope_level == 0)
            return i;
    }
    return find_arg(ctx, fd, name);
}

/* find a variable declaration in a given scope */
static int find_var_in_scope(JSContext *ctx, JSFunctionDef *fd,
                             JSAtom name, int scope_level)
{
    int scope_idx;
    for(scope_idx = fd->scopes[scope_level].first; scope_idx >= 0;
        scope_idx = fd->vars[scope_idx].scope_next) {
        if (fd->vars[scope_idx].scope_level != scope_level)
            break;
        if (fd->vars[scope_idx].var_name == name)
            return scope_idx;
    }
    return -1;
}

/* return true if scope == parent_scope or if scope is a child of
   parent_scope */
static BOOL is_child_scope(JSContext *ctx, JSFunctionDef *fd,
                           int scope, int parent_scope)
{
    while (scope >= 0) {
        if (scope == parent_scope)
            return TRUE;
        scope = fd->scopes[scope].parent;
    }
    return FALSE;
}

/* find a 'var' declaration in the same scope or a child scope */
static int find_var_in_child_scope(JSContext *ctx, JSFunctionDef *fd,
                                   JSAtom name, int scope_level)
{
    int i;
    for(i = 0; i < fd->var_count; i++) {
        JSVarDef *vd = &fd->vars[i];
        if (vd->var_name == name && vd->scope_level == 0) {
            if (is_child_scope(ctx, fd, vd->scope_next,
                               scope_level))
                return i;
        }
    }
    return -1;
}


static JSGlobalVar *find_global_var(JSFunctionDef *fd, JSAtom name)
{
    int i;
    for(i = 0; i < fd->global_var_count; i++) {
        JSGlobalVar *hf = &fd->global_vars[i];
        if (hf->var_name == name)
            return hf;
    }
    return NULL;

}

static JSGlobalVar *find_lexical_global_var(JSFunctionDef *fd, JSAtom name)
{
    JSGlobalVar *hf = find_global_var(fd, name);
    if (hf && hf->is_lexical)
        return hf;
    else
        return NULL;
}

static int find_lexical_decl(JSContext *ctx, JSFunctionDef *fd, JSAtom name,
                             int scope_idx, BOOL check_catch_var)
{
    while (scope_idx >= 0) {
        JSVarDef *vd = &fd->vars[scope_idx];
        if (vd->var_name == name &&
            (vd->is_lexical || (vd->var_kind == JS_VAR_CATCH &&
                                check_catch_var)))
            return scope_idx;
        scope_idx = vd->scope_next;
    }

    if (fd->is_eval && fd->eval_type == JS_EVAL_TYPE_GLOBAL) {
        if (find_lexical_global_var(fd, name))
            return GLOBAL_VAR_OFFSET;
    }
    return -1;
}

static int push_scope(JSParseState *s) {
    if (s->cur_func) {
        JSFunctionDef *fd = s->cur_func;
        int scope = fd->scope_count;
        /* XXX: should check for scope overflow */
        if ((fd->scope_count + 1) > fd->scope_size) {
            int new_size;
            size_t slack;
            JSVarScope *new_buf;
            /* XXX: potential arithmetic overflow */
            new_size = max_int(fd->scope_count + 1, fd->scope_size * 3 / 2);
            if (fd->scopes == fd->def_scope_array) {
                new_buf = (JSVarScope*) js_realloc2(s->ctx, NULL, new_size * sizeof(*fd->scopes), &slack);
                if (!new_buf)
                    return -1;
                memcpy(new_buf, fd->scopes, fd->scope_count * sizeof(*fd->scopes));
            } else {
                new_buf = (JSVarScope*) js_realloc2(s->ctx, fd->scopes, new_size * sizeof(*fd->scopes), &slack);
                if (!new_buf)
                    return -1;
            }
            new_size += slack / sizeof(*new_buf);
            fd->scopes = new_buf;
            fd->scope_size = new_size;
        }
        fd->scope_count++;
        fd->scopes[scope].parent = fd->scope_level;
        fd->scopes[scope].first = fd->scope_first;
        emit_op(s, OP_enter_scope);
        emit_u16(s, scope);
        return fd->scope_level = scope;
    }
    return 0;
}

static int get_first_lexical_var(JSFunctionDef *fd, int scope)
{
    while (scope >= 0) {
        int scope_idx = fd->scopes[scope].first;
        if (scope_idx >= 0)
            return scope_idx;
        scope = fd->scopes[scope].parent;
    }
    return -1;
}

static void pop_scope(JSParseState *s) {
    if (s->cur_func) {
        /* disable scoped variables */
        JSFunctionDef *fd = s->cur_func;
        int scope = fd->scope_level;
        emit_op(s, OP_leave_scope);
        emit_u16(s, scope);
        fd->scope_level = fd->scopes[scope].parent;
        fd->scope_first = get_first_lexical_var(fd, fd->scope_level);
    }
}

static void close_scopes(JSParseState *s, int scope, int scope_stop)
{
    while (scope > scope_stop) {
        emit_op(s, OP_leave_scope);
        emit_u16(s, scope);
        scope = s->cur_func->scopes[scope].parent;
    }
}

/* return the variable index or -1 if error */
static int add_var(JSContext *ctx, JSFunctionDef *fd, JSAtom name)
{
    JSVarDef *vd;

    /* the local variable indexes are currently stored on 16 bits */
    if (fd->var_count >= JS_MAX_LOCAL_VARS) {
        JS_ThrowInternalError(ctx, "too many local variables");
        return -1;
    }
    if (js_resize_array(ctx, (void **)&fd->vars, sizeof(fd->vars[0]),
                        &fd->var_size, fd->var_count + 1))
        return -1;
    vd = &fd->vars[fd->var_count++];
    memset(vd, 0, sizeof(*vd));
    vd->var_name = JS_DupAtom(ctx, name);
    vd->func_pool_idx = -1;
    return fd->var_count - 1;
}

static int add_scope_var(JSContext *ctx, JSFunctionDef *fd, JSAtom name,
                         JSVarKindEnum var_kind)
{
    int idx = add_var(ctx, fd, name);
    if (idx >= 0) {
        JSVarDef *vd = &fd->vars[idx];
        vd->var_kind = var_kind;
        vd->scope_level = fd->scope_level;
        vd->scope_next = fd->scope_first;
        fd->scopes[fd->scope_level].first = idx;
        fd->scope_first = idx;
    }
    return idx;
}

static int add_func_var(JSContext *ctx, JSFunctionDef *fd, JSAtom name)
{
    int idx = fd->func_var_idx;
    if (idx < 0 && (idx = add_var(ctx, fd, name)) >= 0) {
        fd->func_var_idx = idx;
        fd->vars[idx].var_kind = JS_VAR_FUNCTION_NAME;
        if (fd->js_mode & JS_MODE_STRICT)
            fd->vars[idx].is_const = TRUE;
    }
    return idx;
}

static int add_arguments_var(JSContext *ctx, JSFunctionDef *fd)
{
    int idx = fd->arguments_var_idx;
    if (idx < 0 && (idx = add_var(ctx, fd, JS_ATOM_arguments)) >= 0) {
        fd->arguments_var_idx = idx;
    }
    return idx;
}

/* add an argument definition in the argument scope. Only needed when
   "eval()" may be called in the argument scope. Return 0 if OK. */
static int add_arguments_arg(JSContext *ctx, JSFunctionDef *fd)
{
    int idx;
    if (fd->arguments_arg_idx < 0) {
        idx = find_var_in_scope(ctx, fd, JS_ATOM_arguments, ARG_SCOPE_INDEX);
        if (idx < 0) {
            /* XXX: the scope links are not fully updated. May be an
               issue if there are child scopes of the argument
               scope */
            idx = add_var(ctx, fd, JS_ATOM_arguments);
            if (idx < 0)
                return -1;
            fd->vars[idx].scope_next = fd->scopes[ARG_SCOPE_INDEX].first;
            fd->scopes[ARG_SCOPE_INDEX].first = idx;
            fd->vars[idx].scope_level = ARG_SCOPE_INDEX;
            fd->vars[idx].is_lexical = TRUE;

            fd->arguments_arg_idx = idx;
        }
    }
    return 0;
}

static int add_arg(JSContext *ctx, JSFunctionDef *fd, JSAtom name)
{
    JSVarDef *vd;

    /* the local variable indexes are currently stored on 16 bits */
    if (fd->arg_count >= JS_MAX_LOCAL_VARS) {
        JS_ThrowInternalError(ctx, "too many arguments");
        return -1;
    }
    if (js_resize_array(ctx, (void **)&fd->args, sizeof(fd->args[0]),
                        &fd->arg_size, fd->arg_count + 1))
        return -1;
    vd = &fd->args[fd->arg_count++];
    memset(vd, 0, sizeof(*vd));
    vd->var_name = JS_DupAtom(ctx, name);
    vd->func_pool_idx = -1;
    return fd->arg_count - 1;
}

/* add a global variable definition */
static JSGlobalVar *add_global_var(JSContext *ctx, JSFunctionDef *s,
                                     JSAtom name)
{
    JSGlobalVar *hf;

    if (js_resize_array(ctx, (void **)&s->global_vars,
                        sizeof(s->global_vars[0]),
                        &s->global_var_size, s->global_var_count + 1))
        return NULL;
    hf = &s->global_vars[s->global_var_count++];
    hf->cpool_idx = -1;
    hf->force_init = FALSE;
    hf->is_lexical = FALSE;
    hf->is_const = FALSE;
    hf->scope_level = s->scope_level;
    hf->var_name = JS_DupAtom(ctx, name);
    return hf;
}

typedef enum {
    JS_VAR_DEF_WITH,
    JS_VAR_DEF_LET,
    JS_VAR_DEF_CONST,
    JS_VAR_DEF_FUNCTION_DECL, /* function declaration */
    JS_VAR_DEF_NEW_FUNCTION_DECL, /* async/generator function declaration */
    JS_VAR_DEF_CATCH,
    JS_VAR_DEF_VAR,
} JSVarDefEnum;

static int define_var(JSParseState *s, JSFunctionDef *fd, JSAtom name,
                      JSVarDefEnum var_def_type)
{
    JSContext *ctx = s->ctx;
    JSVarDef *vd;
    int idx;

    switch (var_def_type) {
    case JS_VAR_DEF_WITH:
        idx = add_scope_var(ctx, fd, name, JS_VAR_NORMAL);
        break;

    case JS_VAR_DEF_LET:
    case JS_VAR_DEF_CONST:
    case JS_VAR_DEF_FUNCTION_DECL:
    case JS_VAR_DEF_NEW_FUNCTION_DECL:
        idx = find_lexical_decl(ctx, fd, name, fd->scope_first, TRUE);
        if (idx >= 0) {
            if (idx < GLOBAL_VAR_OFFSET) {
                if (fd->vars[idx].scope_level == fd->scope_level) {
                    /* same scope: in non strict mode, functions
                       can be redefined (annex B.3.3.4). */
                    if (!(!(fd->js_mode & JS_MODE_STRICT) &&
                          var_def_type == JS_VAR_DEF_FUNCTION_DECL &&
                          fd->vars[idx].var_kind == JS_VAR_FUNCTION_DECL)) {
                        goto redef_lex_error;
                    }
                } else if (fd->vars[idx].var_kind == JS_VAR_CATCH && (fd->vars[idx].scope_level + 2) == fd->scope_level) {
                    goto redef_lex_error;
                }
            } else {
                if (fd->scope_level == fd->body_scope) {
                redef_lex_error:
                    /* redefining a scoped var in the same scope: error */
                    return js_parse_error(s, "invalid redefinition of lexical identifier");
                }
            }
        }
        if (var_def_type != JS_VAR_DEF_FUNCTION_DECL &&
            var_def_type != JS_VAR_DEF_NEW_FUNCTION_DECL &&
            fd->scope_level == fd->body_scope &&
            find_arg(ctx, fd, name) >= 0) {
            /* lexical variable redefines a parameter name */
            return js_parse_error(s, "invalid redefinition of parameter name");
        }

        if (find_var_in_child_scope(ctx, fd, name, fd->scope_level) >= 0) {
            return js_parse_error(s, "invalid redefinition of a variable");
        }

        if (fd->is_global_var) {
            JSGlobalVar *hf;
            hf = find_global_var(fd, name);
            if (hf && is_child_scope(ctx, fd, hf->scope_level,
                                     fd->scope_level)) {
                return js_parse_error(s, "invalid redefinition of global identifier");
            }
        }

        if (fd->is_eval &&
            (fd->eval_type == JS_EVAL_TYPE_GLOBAL ||
             fd->eval_type == JS_EVAL_TYPE_MODULE) &&
            fd->scope_level == fd->body_scope) {
            JSGlobalVar *hf;
            hf = add_global_var(s->ctx, fd, name);
            if (!hf)
                return -1;
            hf->is_lexical = TRUE;
            hf->is_const = (var_def_type == JS_VAR_DEF_CONST);
            idx = GLOBAL_VAR_OFFSET;
        } else {
            JSVarKindEnum var_kind;
            if (var_def_type == JS_VAR_DEF_FUNCTION_DECL)
                var_kind = JS_VAR_FUNCTION_DECL;
            else if (var_def_type == JS_VAR_DEF_NEW_FUNCTION_DECL)
                var_kind = JS_VAR_NEW_FUNCTION_DECL;
            else
                var_kind = JS_VAR_NORMAL;
            idx = add_scope_var(ctx, fd, name, var_kind);
            if (idx >= 0) {
                vd = &fd->vars[idx];
                vd->is_lexical = 1;
                vd->is_const = (var_def_type == JS_VAR_DEF_CONST);
            }
        }
        break;

    case JS_VAR_DEF_CATCH:
        idx = add_scope_var(ctx, fd, name, JS_VAR_CATCH);
        break;

    case JS_VAR_DEF_VAR:
        if (find_lexical_decl(ctx, fd, name, fd->scope_first,
                              FALSE) >= 0) {
       invalid_lexical_redefinition:
            /* error to redefine a var that inside a lexical scope */
            return js_parse_error(s, "invalid redefinition of lexical identifier");
        }
        if (fd->is_global_var) {
            JSGlobalVar *hf;
            hf = find_global_var(fd, name);
            if (hf && hf->is_lexical && hf->scope_level == fd->scope_level &&
                fd->eval_type == JS_EVAL_TYPE_MODULE) {
                goto invalid_lexical_redefinition;
            }
            hf = add_global_var(s->ctx, fd, name);
            if (!hf)
                return -1;
            idx = GLOBAL_VAR_OFFSET;
        } else {
            /* if the variable already exists, don't add it again  */
            idx = find_var(ctx, fd, name);
            if (idx >= 0)
                break;
            idx = add_var(ctx, fd, name);
            if (idx >= 0) {
                if (name == JS_ATOM_arguments && fd->has_arguments_binding)
                    fd->arguments_var_idx = idx;
                fd->vars[idx].scope_next = fd->scope_level;
            }
        }
        break;
    default:
        abort();
    }
    return idx;
}

/* add a private field variable in the current scope */
static int add_private_class_field(JSParseState *s, JSFunctionDef *fd,
                                   JSAtom name, JSVarKindEnum var_kind)
{
    JSContext *ctx = s->ctx;
    JSVarDef *vd;
    int idx;

    idx = add_scope_var(ctx, fd, name, var_kind);
    if (idx < 0)
        return idx;
    vd = &fd->vars[idx];
    vd->is_lexical = 1;
    vd->is_const = 1;
    return idx;
}

[[nodiscard]] static int js_parse_expr(JSParseState *s);
[[nodiscard]] static int js_parse_function_decl(JSParseState *s,
                                              JSParseFunctionEnum func_type,
                                              JSFunctionKindEnum func_kind,
                                              JSAtom func_name, const uint8_t *ptr,
                                              int start_line);
static JSFunctionDef *js_parse_function_class_fields_init(JSParseState *s);
[[nodiscard]] static int js_parse_function_decl2(JSParseState *s,
                                               JSParseFunctionEnum func_type,
                                               JSFunctionKindEnum func_kind,
                                               JSAtom func_name,
                                               const uint8_t *ptr,
                                               int function_line_num,
                                               JSParseExportEnum export_flag,
                                               JSFunctionDef **pfd);
[[nodiscard]] static int js_parse_assign_expr2(JSParseState *s, int parse_flags);
[[nodiscard]] static int js_parse_assign_expr(JSParseState *s);
[[nodiscard]] static int js_parse_unary(JSParseState *s, int parse_flags);
static void push_break_entry(JSFunctionDef *fd, BlockEnv *be,
                             JSAtom label_name,
                             int label_break, int label_cont,
                             int drop_count);
static void pop_break_entry(JSFunctionDef *fd);
static JSExportEntry *add_export_entry(JSParseState *s, JSModuleDef *m,
                                       JSAtom local_name, JSAtom export_name,
                                       JSExportTypeEnum export_type);

/* Note: all the fields are already sealed except length */
static int seal_template_obj(JSContext *ctx, JSValueConst obj)
{
    JSObject *p;
    JSShapeProperty *prs;

    p = JS_VALUE_GET_OBJ(obj);
    prs = find_own_property1(p, JS_ATOM_length);
    if (prs) {
        if (js_update_property_flags(ctx, p, &prs,
                                     prs->flags & ~(JS_PROP_CONFIGURABLE | JS_PROP_WRITABLE)))
            return -1;
    }
    p->extensible = FALSE;
    return 0;
}

[[nodiscard]] static int js_parse_template(JSParseState *s, int call, int *argc)
{
    JSContext *ctx = s->ctx;
    JSValue raw_array, template_object;
    JSToken cooked;
    int depth, ret;

    raw_array = JS_UNDEFINED; /* avoid warning */
    template_object = JS_UNDEFINED; /* avoid warning */
    if (call) {
        /* Create a template object: an array of cooked strings */
        /* Create an array of raw strings and store it to the raw property */
        template_object = JS_NewArray(ctx);
        if (JS_IsException(template_object))
            return -1;
        //        pool_idx = s->cur_func->cpool_count;
        ret = emit_push_const(s, template_object, 0);
        JS_FreeValue(ctx, template_object);
        if (ret)
            return -1;
        raw_array = JS_NewArray(ctx);
        if (JS_IsException(raw_array))
            return -1;
        if (JS_DefinePropertyValue(ctx, template_object, JS_ATOM_raw,
                                   raw_array, JS_PROP_THROW) < 0) {
            return -1;
        }
    }

    depth = 0;
    while (s->token.val == TOK_TEMPLATE) {
        const uint8_t *p = s->token.ptr + 1;
        cooked = s->token;
        if (call) {
            if (JS_DefinePropertyValueUint32(ctx, raw_array, depth,
                                             JS_DupValue(ctx, s->token.u.str.str),
                                             JS_PROP_ENUMERABLE | JS_PROP_THROW) < 0) {
                return -1;
            }
            /* re-parse the string with escape sequences but do not throw a
               syntax error if it contains invalid sequences
             */
            if (js_parse_string(s, '`', FALSE, p, &cooked, &p)) {
                cooked.u.str.str = JS_UNDEFINED;
            }
            if (JS_DefinePropertyValueUint32(ctx, template_object, depth,
                                             cooked.u.str.str,
                                             JS_PROP_ENUMERABLE | JS_PROP_THROW) < 0) {
                return -1;
            }
        } else {
            JSString *str;
            /* re-parse the string with escape sequences and throw a
               syntax error if it contains invalid sequences
             */
            JS_FreeValue(ctx, s->token.u.str.str);
            s->token.u.str.str = JS_UNDEFINED;
            if (js_parse_string(s, '`', TRUE, p, &cooked, &p))
                return -1;
            str = JS_VALUE_GET_STRING(cooked.u.str.str);
            if (str->len != 0 || depth == 0) {
                ret = emit_push_const(s, cooked.u.str.str, 1);
                JS_FreeValue(s->ctx, cooked.u.str.str);
                if (ret)
                    return -1;
                if (depth == 0) {
                    if (s->token.u.str.sep == '`')
                        goto done1;
                    emit_op(s, OP_get_field2);
                    emit_atom(s, JS_ATOM_concat);
                }
                depth++;
            } else {
                JS_FreeValue(s->ctx, cooked.u.str.str);
            }
        }
        if (s->token.u.str.sep == '`')
            goto done;
        if (next_token(s))
            return -1;
        if (js_parse_expr(s))
            return -1;
        depth++;
        if (s->token.val != '}') {
            return js_parse_error(s, "expected '}' after template expression");
        }
        /* XXX: should convert to string at this stage? */
        free_token(s, &s->token);
        /* Resume TOK_TEMPLATE parsing (s->token.line_num and
         * s->token.ptr are OK) */
        s->got_lf = FALSE;
        s->last_line_num = s->token.line_num;
        if (js_parse_template_part(s, s->buf_ptr))
            return -1;
    }
    return js_parse_expect(s, TOK_TEMPLATE);

 done:
    if (call) {
        /* Seal the objects */
        seal_template_obj(ctx, raw_array);
        seal_template_obj(ctx, template_object);
        *argc = depth + 1;
    } else {
        emit_op(s, OP_call_method);
        emit_u16(s, depth - 1);
    }
 done1:
    return next_token(s);
}


#define PROP_TYPE_IDENT 0
#define PROP_TYPE_VAR   1
#define PROP_TYPE_GET   2
#define PROP_TYPE_SET   3
#define PROP_TYPE_STAR  4
#define PROP_TYPE_ASYNC 5
#define PROP_TYPE_ASYNC_STAR 6

#define PROP_TYPE_PRIVATE (1 << 4)

static BOOL token_is_ident(int tok)
{
    /* Accept keywords and reserved words as property names */
    return (tok == TOK_IDENT ||
            (tok >= TOK_FIRST_KEYWORD &&
             tok <= TOK_LAST_KEYWORD));
}

/* if the property is an expression, name = JS_ATOM_NULL */
[[nodiscard]] static int js_parse_property_name(JSParseState *s,
                                              JSAtom *pname,
                                              BOOL allow_method, BOOL allow_var,
                                              BOOL allow_private)
{
    int is_private = 0;
    BOOL is_non_reserved_ident;
    JSAtom name;
    int prop_type;

    prop_type = PROP_TYPE_IDENT;
    if (allow_method) {
        if (token_is_pseudo_keyword(s, JS_ATOM_get)
        ||  token_is_pseudo_keyword(s, JS_ATOM_set)) {
            /* get x(), set x() */
            name = JS_DupAtom(s->ctx, s->token.u.ident.atom);
            if (next_token(s))
                goto fail1;
            if (s->token.val == ':' || s->token.val == ',' ||
                s->token.val == '}' || s->token.val == '(') {
                is_non_reserved_ident = TRUE;
                goto ident_found;
            }
            prop_type = PROP_TYPE_GET + (name == JS_ATOM_set);
            JS_FreeAtom(s->ctx, name);
        } else if (s->token.val == '*') {
            if (next_token(s))
                goto fail;
            prop_type = PROP_TYPE_STAR;
        } else if (token_is_pseudo_keyword(s, JS_ATOM_async) &&
                   peek_token(s, TRUE) != '\n') {
            name = JS_DupAtom(s->ctx, s->token.u.ident.atom);
            if (next_token(s))
                goto fail1;
            if (s->token.val == ':' || s->token.val == ',' ||
                s->token.val == '}' || s->token.val == '(') {
                is_non_reserved_ident = TRUE;
                goto ident_found;
            }
            JS_FreeAtom(s->ctx, name);
            if (s->token.val == '*') {
                if (next_token(s))
                    goto fail;
                prop_type = PROP_TYPE_ASYNC_STAR;
            } else {
                prop_type = PROP_TYPE_ASYNC;
            }
        }
    }

    if (token_is_ident(s->token.val)) {
        /* variable can only be a non-reserved identifier */
        is_non_reserved_ident =
            (s->token.val == TOK_IDENT && !s->token.u.ident.is_reserved);
        /* keywords and reserved words have a valid atom */
        name = JS_DupAtom(s->ctx, s->token.u.ident.atom);
        if (next_token(s))
            goto fail1;
    ident_found:
        if (is_non_reserved_ident &&
            prop_type == PROP_TYPE_IDENT && allow_var) {
            if (!(s->token.val == ':' ||
                  (s->token.val == '(' && allow_method))) {
                prop_type = PROP_TYPE_VAR;
            }
        }
    } else if (s->token.val == TOK_STRING) {
        name = JS_ValueToAtom(s->ctx, s->token.u.str.str);
        if (name == JS_ATOM_NULL)
            goto fail;
        if (next_token(s))
            goto fail1;
    } else if (s->token.val == TOK_NUMBER) {
        JSValue val;
        val = s->token.u.num.val;
#ifdef CONFIG_BIGNUM
        if (JS_VALUE_GET_TAG(val) == JS_TAG_BIG_FLOAT) {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            val = s->ctx->rt->bigfloat_ops.
                mul_pow10_to_float64(s->ctx, &p->num,
                                     s->token.u.num.exponent);
            if (JS_IsException(val))
                goto fail;
            name = JS_ValueToAtom(s->ctx, val);
            JS_FreeValue(s->ctx, val);
        } else
#endif
        {
            name = JS_ValueToAtom(s->ctx, val);
        }
        if (name == JS_ATOM_NULL)
            goto fail;
        if (next_token(s))
            goto fail1;
    } else if (s->token.val == '[') {
        if (next_token(s))
            goto fail;
        if (js_parse_expr(s))
            goto fail;
        if (js_parse_expect(s, ']'))
            goto fail;
        name = JS_ATOM_NULL;
    } else if (s->token.val == TOK_PRIVATE_NAME && allow_private) {
        name = JS_DupAtom(s->ctx, s->token.u.ident.atom);
        if (next_token(s))
            goto fail1;
        is_private = PROP_TYPE_PRIVATE;
    } else {
        goto invalid_prop;
    }
    if (prop_type != PROP_TYPE_IDENT && prop_type != PROP_TYPE_VAR &&
        s->token.val != '(') {
        JS_FreeAtom(s->ctx, name);
    invalid_prop:
        js_parse_error(s, "invalid property name");
        goto fail;
    }
    *pname = name;
    return prop_type | is_private;
 fail1:
    JS_FreeAtom(s->ctx, name);
 fail:
    *pname = JS_ATOM_NULL;
    return -1;
}

typedef struct JSParsePos {
    int last_line_num;
    int line_num;
    BOOL got_lf;
    const uint8_t *ptr;
} JSParsePos;

static int js_parse_get_pos(JSParseState *s, JSParsePos *sp)
{
    sp->last_line_num = s->last_line_num;
    sp->line_num = s->token.line_num;
    sp->ptr = s->token.ptr;
    sp->got_lf = s->got_lf;
    return 0;
}

[[nodiscard]] static int js_parse_seek_token(JSParseState *s, const JSParsePos *sp)
{
    s->token.line_num = sp->last_line_num;
    s->line_num = sp->line_num;
    s->buf_ptr = sp->ptr;
    s->got_lf = sp->got_lf;
    return next_token(s);
}

/* return TRUE if a regexp literal is allowed after this token */
static BOOL is_regexp_allowed(int tok)
{
    switch (tok) {
    case TOK_NUMBER:
    case TOK_STRING:
    case TOK_REGEXP:
    case TOK_DEC:
    case TOK_INC:
    case TOK_NULL:
    case TOK_FALSE:
    case TOK_TRUE:
    case TOK_THIS:
    case ')':
    case ']':
    case '}': /* XXX: regexp may occur after */
    case TOK_IDENT:
        return FALSE;
    default:
        return TRUE;
    }
}

#define SKIP_HAS_SEMI       (1 << 0)
#define SKIP_HAS_ELLIPSIS   (1 << 1)
#define SKIP_HAS_ASSIGNMENT (1 << 2)

/* XXX: improve speed with early bailout */
/* XXX: no longer works if regexps are present. Could use previous
   regexp parsing heuristics to handle most cases */
static int js_parse_skip_parens_token(JSParseState *s, int *pbits, BOOL no_line_terminator)
{
    char state[256];
    size_t level = 0;
    JSParsePos pos;
    int last_tok, tok = TOK_EOF;
    int c, tok_len, bits = 0;

    /* protect from underflow */
    state[level++] = 0;

    js_parse_get_pos(s, &pos);
    last_tok = 0;
    for (;;) {
        switch(s->token.val) {
        case '(':
        case '[':
        case '{':
            if (level >= sizeof(state))
                goto done;
            state[level++] = s->token.val;
            break;
        case ')':
            if (state[--level] != '(')
                goto done;
            break;
        case ']':
            if (state[--level] != '[')
                goto done;
            break;
        case '}':
            c = state[--level];
            if (c == '`') {
                /* continue the parsing of the template */
                free_token(s, &s->token);
                /* Resume TOK_TEMPLATE parsing (s->token.line_num and
                 * s->token.ptr are OK) */
                s->got_lf = FALSE;
                s->last_line_num = s->token.line_num;
                if (js_parse_template_part(s, s->buf_ptr))
                    goto done;
                goto handle_template;
            } else if (c != '{') {
                goto done;
            }
            break;
        case TOK_TEMPLATE:
        handle_template:
            if (s->token.u.str.sep != '`') {
                /* '${' inside the template : closing '}' and continue
                   parsing the template */
                if (level >= sizeof(state))
                    goto done;
                state[level++] = '`';
            }
            break;
        case TOK_EOF:
            goto done;
        case ';':
            if (level == 2) {
                bits |= SKIP_HAS_SEMI;
            }
            break;
        case TOK_ELLIPSIS:
            if (level == 2) {
                bits |= SKIP_HAS_ELLIPSIS;
            }
            break;
        case '=':
            bits |= SKIP_HAS_ASSIGNMENT;
            break;

        case TOK_DIV_ASSIGN:
            tok_len = 2;
            goto parse_regexp;
        case '/':
            tok_len = 1;
        parse_regexp:
            if (is_regexp_allowed(last_tok)) {
                s->buf_ptr -= tok_len;
                if (js_parse_regexp(s)) {
                    /* XXX: should clear the exception */
                    goto done;
                }
            }
            break;
        }
        /* last_tok is only used to recognize regexps */
        if (s->token.val == TOK_IDENT &&
            (token_is_pseudo_keyword(s, JS_ATOM_of) ||
             token_is_pseudo_keyword(s, JS_ATOM_yield))) {
            last_tok = TOK_OF;
        } else {
            last_tok = s->token.val;
        }
        if (next_token(s)) {
            /* XXX: should clear the exception generated by next_token() */
            break;
        }
        if (level <= 1) {
            tok = s->token.val;
            if (token_is_pseudo_keyword(s, JS_ATOM_of))
                tok = TOK_OF;
            if (no_line_terminator && s->last_line_num != s->token.line_num)
                tok = '\n';
            break;
        }
    }
 done:
    if (pbits) {
        *pbits = bits;
    }
    if (js_parse_seek_token(s, &pos))
        return -1;
    return tok;
}

static void set_object_name(JSParseState *s, JSAtom name)
{
    JSFunctionDef *fd = s->cur_func;
    int opcode;

    opcode = get_prev_opcode(fd);
    if (opcode == OP_set_name) {
        /* XXX: should free atom after OP_set_name? */
        fd->byte_code.size = fd->last_opcode_pos;
        fd->last_opcode_pos = -1;
        emit_op(s, OP_set_name);
        emit_atom(s, name);
    } else if (opcode == OP_set_class_name) {
        int define_class_pos;
        JSAtom atom;
        define_class_pos = fd->last_opcode_pos + 1 -
            get_u32(fd->byte_code.buf + fd->last_opcode_pos + 1);
        assert(fd->byte_code.buf[define_class_pos] == OP_define_class);
        /* for consistency we free the previous atom which is
           JS_ATOM_empty_string */
        atom = get_u32(fd->byte_code.buf + define_class_pos + 1);
        JS_FreeAtom(s->ctx, atom);
        put_u32(fd->byte_code.buf + define_class_pos + 1,
                JS_DupAtom(s->ctx, name));
        fd->last_opcode_pos = -1;
    }
}

static void set_object_name_computed(JSParseState *s)
{
    JSFunctionDef *fd = s->cur_func;
    int opcode;

    opcode = get_prev_opcode(fd);
    if (opcode == OP_set_name) {
        /* XXX: should free atom after OP_set_name? */
        fd->byte_code.size = fd->last_opcode_pos;
        fd->last_opcode_pos = -1;
        emit_op(s, OP_set_name_computed);
    } else if (opcode == OP_set_class_name) {
        int define_class_pos;
        define_class_pos = fd->last_opcode_pos + 1 -
            get_u32(fd->byte_code.buf + fd->last_opcode_pos + 1);
        assert(fd->byte_code.buf[define_class_pos] == OP_define_class);
        fd->byte_code.buf[define_class_pos] = OP_define_class_computed;
        fd->last_opcode_pos = -1;
    }
}

[[nodiscard]] static int js_parse_object_literal(JSParseState *s)
{
    JSAtom name = JS_ATOM_NULL;
    const uint8_t *start_ptr;
    int start_line, prop_type;
    BOOL has_proto;

    if (next_token(s))
        goto fail;
    /* XXX: add an initial length that will be patched back */
    emit_op(s, OP_object);
    has_proto = FALSE;
    while (s->token.val != '}') {
        /* specific case for getter/setter */
        start_ptr = s->token.ptr;
        start_line = s->token.line_num;

        if (s->token.val == TOK_ELLIPSIS) {
            if (next_token(s))
                return -1;
            if (js_parse_assign_expr(s))
                return -1;
            emit_op(s, OP_null);  /* dummy excludeList */
            emit_op(s, OP_copy_data_properties);
            emit_u8(s, 2 | (1 << 2) | (0 << 5));
            emit_op(s, OP_drop); /* pop excludeList */
            emit_op(s, OP_drop); /* pop src object */
            goto next;
        }

        prop_type = js_parse_property_name(s, &name, TRUE, TRUE, FALSE);
        if (prop_type < 0)
            goto fail;

        if (prop_type == PROP_TYPE_VAR) {
            /* shortcut for x: x */
            emit_op(s, OP_scope_get_var);
            emit_atom(s, name);
            emit_u16(s, s->cur_func->scope_level);
            emit_op(s, OP_define_field);
            emit_atom(s, name);
        } else if (s->token.val == '(') {
            BOOL is_getset = (prop_type == PROP_TYPE_GET ||
                              prop_type == PROP_TYPE_SET);
            JSParseFunctionEnum func_type;
            JSFunctionKindEnum func_kind;
            int op_flags;

            func_kind = JS_FUNC_NORMAL;
            if (is_getset) {
                func_type = (JSParseFunctionEnum) (JS_PARSE_FUNC_GETTER + prop_type - PROP_TYPE_GET);
            } else {
                func_type = JS_PARSE_FUNC_METHOD;
                if (prop_type == PROP_TYPE_STAR)
                    func_kind = JS_FUNC_GENERATOR;
                else if (prop_type == PROP_TYPE_ASYNC)
                    func_kind = JS_FUNC_ASYNC;
                else if (prop_type == PROP_TYPE_ASYNC_STAR)
                    func_kind = JS_FUNC_ASYNC_GENERATOR;
            }
            if (js_parse_function_decl(s, func_type, func_kind, JS_ATOM_NULL,
                                       start_ptr, start_line))
                goto fail;
            if (name == JS_ATOM_NULL) {
                emit_op(s, OP_define_method_computed);
            } else {
                emit_op(s, OP_define_method);
                emit_atom(s, name);
            }
            if (is_getset) {
                op_flags = OP_DEFINE_METHOD_GETTER +
                    prop_type - PROP_TYPE_GET;
            } else {
                op_flags = OP_DEFINE_METHOD_METHOD;
            }
            emit_u8(s, op_flags | OP_DEFINE_METHOD_ENUMERABLE);
        } else {
            if (js_parse_expect(s, ':'))
                goto fail;
            if (js_parse_assign_expr(s))
                goto fail;
            if (name == JS_ATOM_NULL) {
                set_object_name_computed(s);
                emit_op(s, OP_define_array_el);
                emit_op(s, OP_drop);
            } else if (name == JS_ATOM___proto__) {
                if (has_proto) {
                    js_parse_error(s, "duplicate __proto__ property name");
                    goto fail;
                }
                emit_op(s, OP_set_proto);
                has_proto = TRUE;
            } else {
                set_object_name(s, name);
                emit_op(s, OP_define_field);
                emit_atom(s, name);
            }
        }
        JS_FreeAtom(s->ctx, name);
    next:
        name = JS_ATOM_NULL;
        if (s->token.val != ',')
            break;
        if (next_token(s))
            goto fail;
    }
    if (js_parse_expect(s, '}'))
        goto fail;
    return 0;
 fail:
    JS_FreeAtom(s->ctx, name);
    return -1;
}

/* allow the 'in' binary operator */
#define PF_IN_ACCEPTED  (1 << 0)
/* allow function calls parsing in js_parse_postfix_expr() */
#define PF_POSTFIX_CALL (1 << 1)
/* allow arrow functions parsing in js_parse_postfix_expr() */
#define PF_ARROW_FUNC   (1 << 2)
/* allow the exponentiation operator in js_parse_unary() */
#define PF_POW_ALLOWED  (1 << 3)
/* forbid the exponentiation operator in js_parse_unary() */
#define PF_POW_FORBIDDEN (1 << 4)

[[nodiscard]] static int js_parse_postfix_expr(JSParseState *s, int parse_flags);

[[nodiscard]] static int js_parse_left_hand_side_expr(JSParseState *s)
{
    return js_parse_postfix_expr(s, PF_POSTFIX_CALL);
}

/* XXX: could generate specific bytecode */
[[nodiscard]] static int js_parse_class_default_ctor(JSParseState *s,
                                                   BOOL has_super,
                                                   JSFunctionDef **pfd)
{
    JSParsePos pos;
    const char *str;
    int ret, line_num;
    JSParseFunctionEnum func_type;
    const uint8_t *saved_buf_end;

    js_parse_get_pos(s, &pos);
    if (has_super) {
        /* spec change: no argument evaluation */
        str = "(){super(...arguments);}";
        func_type = JS_PARSE_FUNC_DERIVED_CLASS_CONSTRUCTOR;
    } else {
        str = "(){}";
        func_type = JS_PARSE_FUNC_CLASS_CONSTRUCTOR;
    }
    line_num = s->token.line_num;
    saved_buf_end = s->buf_end;
    s->buf_ptr = (uint8_t *)str;
    s->buf_end = (uint8_t *)(str + strlen(str));
    ret = next_token(s);
    if (!ret) {
        ret = js_parse_function_decl2(s, func_type, JS_FUNC_NORMAL,
                                      JS_ATOM_NULL, (uint8_t *)str,
                                      line_num, JS_PARSE_EXPORT_NONE, pfd);
    }
    s->buf_end = saved_buf_end;
    ret |= js_parse_seek_token(s, &pos);
    return ret;
}

/* find field in the current scope */
static int find_private_class_field(JSContext *ctx, JSFunctionDef *fd,
                                    JSAtom name, int scope_level)
{
    int idx;
    idx = fd->scopes[scope_level].first;
    while (idx != -1) {
        if (fd->vars[idx].scope_level != scope_level)
            break;
        if (fd->vars[idx].var_name == name)
            return idx;
        idx = fd->vars[idx].scope_next;
    }
    return -1;
}

/* initialize the class fields, called by the constructor. Note:
   super() can be called in an arrow function, so <this> and
   <class_fields_init> can be variable references */
static void emit_class_field_init(JSParseState *s)
{
    int label_next;

    emit_op(s, OP_scope_get_var);
    emit_atom(s, JS_ATOM_class_fields_init);
    emit_u16(s, s->cur_func->scope_level);

    /* no need to call the class field initializer if not defined */
    emit_op(s, OP_dup);
    label_next = emit_goto(s, OP_if_false, -1);

    emit_op(s, OP_scope_get_var);
    emit_atom(s, JS_ATOM_this);
    emit_u16(s, 0);

    emit_op(s, OP_swap);

    emit_op(s, OP_call_method);
    emit_u16(s, 0);

    emit_label(s, label_next);
    emit_op(s, OP_drop);
}

/* build a private setter function name from the private getter name */
static JSAtom get_private_setter_name(JSContext *ctx, JSAtom name)
{
    return js_atom_concat_str(ctx, name, "<set>");
}

typedef struct {
    JSFunctionDef *fields_init_fd;
    int computed_fields_count;
    BOOL has_brand;
    int brand_push_pos;
} ClassFieldsDef;

[[nodiscard]] static int emit_class_init_start(JSParseState *s,
                                             ClassFieldsDef *cf)
{
    int label_add_brand;

    cf->fields_init_fd = js_parse_function_class_fields_init(s);
    if (!cf->fields_init_fd)
        return -1;

    s->cur_func = cf->fields_init_fd;

    /* XXX: would be better to add the code only if needed, maybe in a
       later pass */
    emit_op(s, OP_push_false); /* will be patched later */
    cf->brand_push_pos = cf->fields_init_fd->last_opcode_pos;
    label_add_brand = emit_goto(s, OP_if_false, -1);

    emit_op(s, OP_scope_get_var);
    emit_atom(s, JS_ATOM_this);
    emit_u16(s, 0);

    emit_op(s, OP_scope_get_var);
    emit_atom(s, JS_ATOM_home_object);
    emit_u16(s, 0);

    emit_op(s, OP_add_brand);

    emit_label(s, label_add_brand);

    s->cur_func = s->cur_func->parent;
    return 0;
}

[[nodiscard]] static int add_brand(JSParseState *s, ClassFieldsDef *cf)
{
    if (!cf->has_brand) {
        /* define the brand field in 'this' of the initializer */
        if (!cf->fields_init_fd) {
            if (emit_class_init_start(s, cf))
                return -1;
        }
        /* patch the start of the function to enable the OP_add_brand code */
        cf->fields_init_fd->byte_code.buf[cf->brand_push_pos] = OP_push_true;

        cf->has_brand = TRUE;
    }
    return 0;
}

static void emit_class_init_end(JSParseState *s, ClassFieldsDef *cf)
{
    int cpool_idx;

    s->cur_func = cf->fields_init_fd;
    emit_op(s, OP_return_undef);
    s->cur_func = s->cur_func->parent;

    cpool_idx = cpool_add(s, JS_NULL);
    cf->fields_init_fd->parent_cpool_idx = cpool_idx;
    emit_op(s, OP_fclosure);
    emit_u32(s, cpool_idx);
    emit_op(s, OP_set_home_object);
}


[[nodiscard]] static int js_parse_class(JSParseState *s, BOOL is_class_expr,
                                      JSParseExportEnum export_flag)
{
    JSContext *ctx = s->ctx;
    JSFunctionDef *fd = s->cur_func;
    JSAtom name = JS_ATOM_NULL, class_name = JS_ATOM_NULL, class_name1;
    JSAtom class_var_name = JS_ATOM_NULL;
    JSFunctionDef *method_fd, *ctor_fd;
    int saved_js_mode, class_name_var_idx, prop_type, ctor_cpool_offset;
    int class_flags = 0, i, define_class_offset;
    BOOL is_static, is_private;
    const uint8_t *class_start_ptr = s->token.ptr;
    const uint8_t *start_ptr;
    ClassFieldsDef class_fields[2];

    /* classes are parsed and executed in strict mode */
    saved_js_mode = fd->js_mode;
    fd->js_mode |= JS_MODE_STRICT;
    if (next_token(s))
        goto fail;
    if (s->token.val == TOK_IDENT) {
        if (s->token.u.ident.is_reserved) {
            js_parse_error_reserved_identifier(s);
            goto fail;
        }
        class_name = JS_DupAtom(ctx, s->token.u.ident.atom);
        if (next_token(s))
            goto fail;
    } else if (!is_class_expr && export_flag != JS_PARSE_EXPORT_DEFAULT) {
        js_parse_error(s, "class statement requires a name");
        goto fail;
    }
    if (!is_class_expr) {
        if (class_name == JS_ATOM_NULL)
            class_var_name = JS_ATOM__default_; /* export default */
        else
            class_var_name = class_name;
        class_var_name = JS_DupAtom(ctx, class_var_name);
    }

    push_scope(s);

    if (s->token.val == TOK_EXTENDS) {
        class_flags = JS_DEFINE_CLASS_HAS_HERITAGE;
        if (next_token(s))
            goto fail;
        if (js_parse_left_hand_side_expr(s))
            goto fail;
    } else {
        emit_op(s, OP_undefined);
    }

    /* add a 'const' definition for the class name */
    if (class_name != JS_ATOM_NULL) {
        class_name_var_idx = define_var(s, fd, class_name, JS_VAR_DEF_CONST);
        if (class_name_var_idx < 0)
            goto fail;
    }

    if (js_parse_expect(s, '{'))
        goto fail;

    /* this scope contains the private fields */
    push_scope(s);

    emit_op(s, OP_push_const);
    ctor_cpool_offset = fd->byte_code.size;
    emit_u32(s, 0); /* will be patched at the end of the class parsing */

    if (class_name == JS_ATOM_NULL) {
        if (class_var_name != JS_ATOM_NULL)
            class_name1 = JS_ATOM_default;
        else
            class_name1 = JS_ATOM_empty_string;
    } else {
        class_name1 = class_name;
    }

    emit_op(s, OP_define_class);
    emit_atom(s, class_name1);
    emit_u8(s, class_flags);
    define_class_offset = fd->last_opcode_pos;

    for(i = 0; i < 2; i++) {
        ClassFieldsDef *cf = &class_fields[i];
        cf->fields_init_fd = NULL;
        cf->computed_fields_count = 0;
        cf->has_brand = FALSE;
    }

    ctor_fd = NULL;
    while (s->token.val != '}') {
        if (s->token.val == ';') {
            if (next_token(s))
                goto fail;
            continue;
        }
        is_static = (s->token.val == TOK_STATIC);
        prop_type = -1;
        if (is_static) {
            if (next_token(s))
                goto fail;
            /* allow "static" field name */
            if (s->token.val == ';' || s->token.val == '=') {
                is_static = FALSE;
                name = JS_DupAtom(ctx, JS_ATOM_static);
                prop_type = PROP_TYPE_IDENT;
            }
        }
        if (is_static)
            emit_op(s, OP_swap);
        start_ptr = s->token.ptr;
        if (prop_type < 0) {
            prop_type = js_parse_property_name(s, &name, TRUE, FALSE, TRUE);
            if (prop_type < 0)
                goto fail;
        }
        is_private = prop_type & PROP_TYPE_PRIVATE;
        prop_type &= ~PROP_TYPE_PRIVATE;

        if ((name == JS_ATOM_constructor && !is_static &&
             prop_type != PROP_TYPE_IDENT) ||
            (name == JS_ATOM_prototype && is_static) ||
            name == JS_ATOM_hash_constructor) {
            js_parse_error(s, "invalid method name");
            goto fail;
        }
        if (prop_type == PROP_TYPE_GET || prop_type == PROP_TYPE_SET) {
            BOOL is_set = prop_type - PROP_TYPE_GET;
            JSFunctionDef *method_fd;

            if (is_private) {
                int idx, var_kind;
                idx = find_private_class_field(ctx, fd, name, fd->scope_level);
                if (idx >= 0) {
                    var_kind = fd->vars[idx].var_kind;
                    if (var_kind == JS_VAR_PRIVATE_FIELD ||
                        var_kind == JS_VAR_PRIVATE_METHOD ||
                        var_kind == JS_VAR_PRIVATE_GETTER_SETTER ||
                        var_kind == (JS_VAR_PRIVATE_GETTER + is_set)) {
                        goto private_field_already_defined;
                    }
                    fd->vars[idx].var_kind = JS_VAR_PRIVATE_GETTER_SETTER;
                } else {
                    if (add_private_class_field(s, fd, name,
                                                (JSVarKindEnum) (JS_VAR_PRIVATE_GETTER + is_set)) < 0)
                        goto fail;
                }
                if (add_brand(s, &class_fields[is_static]) < 0)
                    goto fail;
            }

            if (js_parse_function_decl2(s, (JSParseFunctionEnum) (JS_PARSE_FUNC_GETTER + is_set),
                                        JS_FUNC_NORMAL, JS_ATOM_NULL,
                                        start_ptr, s->token.line_num,
                                        JS_PARSE_EXPORT_NONE, &method_fd))
                goto fail;
            if (is_private) {
                method_fd->need_home_object = TRUE; /* needed for brand check */
                emit_op(s, OP_set_home_object);
                /* XXX: missing function name */
                emit_op(s, OP_scope_put_var_init);
                if (is_set) {
                    JSAtom setter_name;
                    int ret;

                    setter_name = get_private_setter_name(ctx, name);
                    if (setter_name == JS_ATOM_NULL)
                        goto fail;
                    emit_atom(s, setter_name);
                    ret = add_private_class_field(s, fd, setter_name,
                                                  JS_VAR_PRIVATE_SETTER);
                    JS_FreeAtom(ctx, setter_name);
                    if (ret < 0)
                        goto fail;
                } else {
                    emit_atom(s, name);
                }
                emit_u16(s, s->cur_func->scope_level);
            } else {
                if (name == JS_ATOM_NULL) {
                    emit_op(s, OP_define_method_computed);
                } else {
                    emit_op(s, OP_define_method);
                    emit_atom(s, name);
                }
                emit_u8(s, OP_DEFINE_METHOD_GETTER + is_set);
            }
        } else if (prop_type == PROP_TYPE_IDENT && s->token.val != '(') {
            ClassFieldsDef *cf = &class_fields[is_static];
            JSAtom field_var_name = JS_ATOM_NULL;

            /* class field */

            /* XXX: spec: not consistent with method name checks */
            if (name == JS_ATOM_constructor || name == JS_ATOM_prototype) {
                js_parse_error(s, "invalid field name");
                goto fail;
            }

            if (is_private) {
                if (find_private_class_field(ctx, fd, name,
                                             fd->scope_level) >= 0) {
                    goto private_field_already_defined;
                }
                if (add_private_class_field(s, fd, name,
                                            JS_VAR_PRIVATE_FIELD) < 0)
                    goto fail;
                emit_op(s, OP_private_symbol);
                emit_atom(s, name);
                emit_op(s, OP_scope_put_var_init);
                emit_atom(s, name);
                emit_u16(s, s->cur_func->scope_level);
            }

            if (!cf->fields_init_fd) {
                if (emit_class_init_start(s, cf))
                    goto fail;
            }
            if (name == JS_ATOM_NULL ) {
                /* save the computed field name into a variable */
                field_var_name = js_atom_concat_num(ctx, JS_ATOM_computed_field + is_static, cf->computed_fields_count);
                if (field_var_name == JS_ATOM_NULL)
                    goto fail;
                if (define_var(s, fd, field_var_name, JS_VAR_DEF_CONST) < 0) {
                    JS_FreeAtom(ctx, field_var_name);
                    goto fail;
                }
                emit_op(s, OP_to_propkey);
                emit_op(s, OP_scope_put_var_init);
                emit_atom(s, field_var_name);
                emit_u16(s, s->cur_func->scope_level);
            }
            s->cur_func = cf->fields_init_fd;
            emit_op(s, OP_scope_get_var);
            emit_atom(s, JS_ATOM_this);
            emit_u16(s, 0);

            if (name == JS_ATOM_NULL) {
                emit_op(s, OP_scope_get_var);
                emit_atom(s, field_var_name);
                emit_u16(s, s->cur_func->scope_level);
                cf->computed_fields_count++;
                JS_FreeAtom(ctx, field_var_name);
            } else if (is_private) {
                emit_op(s, OP_scope_get_var);
                emit_atom(s, name);
                emit_u16(s, s->cur_func->scope_level);
            }

            if (s->token.val == '=') {
                if (next_token(s))
                    goto fail;
                if (js_parse_assign_expr(s))
                    goto fail;
            } else {
                emit_op(s, OP_undefined);
            }
            if (is_private) {
                set_object_name_computed(s);
                emit_op(s, OP_define_private_field);
            } else if (name == JS_ATOM_NULL) {
                set_object_name_computed(s);
                emit_op(s, OP_define_array_el);
                emit_op(s, OP_drop);
            } else {
                set_object_name(s, name);
                emit_op(s, OP_define_field);
                emit_atom(s, name);
            }
            s->cur_func = s->cur_func->parent;
            if (js_parse_expect_semi(s))
                goto fail;
        } else {
            JSParseFunctionEnum func_type;
            JSFunctionKindEnum func_kind;

            func_type = JS_PARSE_FUNC_METHOD;
            func_kind = JS_FUNC_NORMAL;
            if (prop_type == PROP_TYPE_STAR) {
                func_kind = JS_FUNC_GENERATOR;
            } else if (prop_type == PROP_TYPE_ASYNC) {
                func_kind = JS_FUNC_ASYNC;
            } else if (prop_type == PROP_TYPE_ASYNC_STAR) {
                func_kind = JS_FUNC_ASYNC_GENERATOR;
            } else if (name == JS_ATOM_constructor && !is_static) {
                if (ctor_fd) {
                    js_parse_error(s, "property constructor appears more than once");
                    goto fail;
                }
                if (class_flags & JS_DEFINE_CLASS_HAS_HERITAGE)
                    func_type = JS_PARSE_FUNC_DERIVED_CLASS_CONSTRUCTOR;
                else
                    func_type = JS_PARSE_FUNC_CLASS_CONSTRUCTOR;
            }
            if (is_private) {
                if (add_brand(s, &class_fields[is_static]) < 0)
                    goto fail;
            }
            if (js_parse_function_decl2(s, func_type, func_kind, JS_ATOM_NULL, start_ptr, s->token.line_num, JS_PARSE_EXPORT_NONE, &method_fd))
                goto fail;
            if (func_type == JS_PARSE_FUNC_DERIVED_CLASS_CONSTRUCTOR ||
                func_type == JS_PARSE_FUNC_CLASS_CONSTRUCTOR) {
                ctor_fd = method_fd;
            } else if (is_private) {
                method_fd->need_home_object = TRUE; /* needed for brand check */
                if (find_private_class_field(ctx, fd, name,
                                             fd->scope_level) >= 0) {
                private_field_already_defined:
                    js_parse_error(s, "private class field is already defined");
                    goto fail;
                }
                if (add_private_class_field(s, fd, name,
                                            JS_VAR_PRIVATE_METHOD) < 0)
                    goto fail;
                emit_op(s, OP_set_home_object);
                emit_op(s, OP_set_name);
                emit_atom(s, name);
                emit_op(s, OP_scope_put_var_init);
                emit_atom(s, name);
                emit_u16(s, s->cur_func->scope_level);
            } else {
                if (name == JS_ATOM_NULL) {
                    emit_op(s, OP_define_method_computed);
                } else {
                    emit_op(s, OP_define_method);
                    emit_atom(s, name);
                }
                emit_u8(s, OP_DEFINE_METHOD_METHOD);
            }
        }
        if (is_static)
            emit_op(s, OP_swap);
        JS_FreeAtom(ctx, name);
        name = JS_ATOM_NULL;
    }

    if (s->token.val != '}') {
        js_parse_error(s, "expecting '%c'", '}');
        goto fail;
    }

    if (!ctor_fd) {
        if (js_parse_class_default_ctor(s, class_flags & JS_DEFINE_CLASS_HAS_HERITAGE, &ctor_fd))
            goto fail;
    }
    /* patch the constant pool index for the constructor */
    put_u32(fd->byte_code.buf + ctor_cpool_offset, ctor_fd->parent_cpool_idx);

    /* store the class source code in the constructor. */
    if (!(fd->js_mode & JS_MODE_STRIP)) {
        js_free(ctx, ctor_fd->source);
        ctor_fd->source_len = s->buf_ptr - class_start_ptr;
        ctor_fd->source = js_strndup(ctx, (const char *)class_start_ptr,
                                     ctor_fd->source_len);
        if (!ctor_fd->source)
            goto fail;
    }

    /* consume the '}' */
    if (next_token(s))
        goto fail;

    /* store the function to initialize the fields to that it can be
       referenced by the constructor */
    {
        ClassFieldsDef *cf = &class_fields[0];
        int var_idx;

        var_idx = define_var(s, fd, JS_ATOM_class_fields_init,
                             JS_VAR_DEF_CONST);
        if (var_idx < 0)
            goto fail;
        if (cf->fields_init_fd) {
            emit_class_init_end(s, cf);
        } else {
            emit_op(s, OP_undefined);
        }
        emit_op(s, OP_scope_put_var_init);
        emit_atom(s, JS_ATOM_class_fields_init);
        emit_u16(s, s->cur_func->scope_level);
    }

    /* drop the prototype */
    emit_op(s, OP_drop);

    /* initialize the static fields */
    if (class_fields[1].fields_init_fd != NULL) {
        ClassFieldsDef *cf = &class_fields[1];
        emit_op(s, OP_dup);
        emit_class_init_end(s, cf);
        emit_op(s, OP_call_method);
        emit_u16(s, 0);
        emit_op(s, OP_drop);
    }

    if (class_name != JS_ATOM_NULL) {
        /* store the class name in the scoped class name variable (it
           is independent from the class statement variable
           definition) */
        emit_op(s, OP_dup);
        emit_op(s, OP_scope_put_var_init);
        emit_atom(s, class_name);
        emit_u16(s, fd->scope_level);
    }
    pop_scope(s);
    pop_scope(s);

    /* the class statements have a block level scope */
    if (class_var_name != JS_ATOM_NULL) {
        if (define_var(s, fd, class_var_name, JS_VAR_DEF_LET) < 0)
            goto fail;
        emit_op(s, OP_scope_put_var_init);
        emit_atom(s, class_var_name);
        emit_u16(s, fd->scope_level);
    } else {
        if (class_name == JS_ATOM_NULL) {
            /* cannot use OP_set_name because the name of the class
               must be defined before the static initializers are
               executed */
            emit_op(s, OP_set_class_name);
            emit_u32(s, fd->last_opcode_pos + 1 - define_class_offset);
        }
    }

    if (export_flag != JS_PARSE_EXPORT_NONE) {
        if (!add_export_entry(s, fd->module,
                              class_var_name,
                              export_flag == JS_PARSE_EXPORT_NAMED ? class_var_name : JS_ATOM_default,
                              JS_EXPORT_TYPE_LOCAL))
            goto fail;
    }

    JS_FreeAtom(ctx, class_name);
    JS_FreeAtom(ctx, class_var_name);
    fd->js_mode = saved_js_mode;
    return 0;
 fail:
    JS_FreeAtom(ctx, name);
    JS_FreeAtom(ctx, class_name);
    JS_FreeAtom(ctx, class_var_name);
    fd->js_mode = saved_js_mode;
    return -1;
}

static int js_parse_array_literal(JSParseState *s)
{
    uint32_t idx;
    BOOL need_length;

    if (next_token(s))
        return -1;
    /* small regular arrays are created on the stack */
    idx = 0;
    while (s->token.val != ']' && idx < 32) {
        if (s->token.val == ',' || s->token.val == TOK_ELLIPSIS)
            break;
        if (js_parse_assign_expr(s))
            return -1;
        idx++;
        /* accept trailing comma */
        if (s->token.val == ',') {
            if (next_token(s))
                return -1;
        } else
        if (s->token.val != ']')
            goto done;
    }
    emit_op(s, OP_array_from);
    emit_u16(s, idx);

    /* larger arrays and holes are handled with explicit indices */
    need_length = FALSE;
    while (s->token.val != ']' && idx < 0x7fffffff) {
        if (s->token.val == TOK_ELLIPSIS)
            break;
        need_length = TRUE;
        if (s->token.val != ',') {
            if (js_parse_assign_expr(s))
                return -1;
            emit_op(s, OP_define_field);
            emit_u32(s, __JS_AtomFromUInt32(idx));
            need_length = FALSE;
        }
        idx++;
        /* accept trailing comma */
        if (s->token.val == ',') {
            if (next_token(s))
                return -1;
        }
    }
    if (s->token.val == ']') {
        if (need_length) {
            /* Set the length: Cannot use OP_define_field because
               length is not configurable */
            emit_op(s, OP_dup);
            emit_op(s, OP_push_i32);
            emit_u32(s, idx);
            emit_op(s, OP_put_field);
            emit_atom(s, JS_ATOM_length);
        }
        goto done;
    }

    /* huge arrays and spread elements require a dynamic index on the stack */
    emit_op(s, OP_push_i32);
    emit_u32(s, idx);

    /* stack has array, index */
    while (s->token.val != ']') {
        if (s->token.val == TOK_ELLIPSIS) {
            if (next_token(s))
                return -1;
            if (js_parse_assign_expr(s))
                return -1;
#if 1
            emit_op(s, OP_append);
#else
            int label_next, label_done;
            label_next = new_label(s);
            label_done = new_label(s);
            /* enumerate object */
            emit_op(s, OP_for_of_start);
            emit_op(s, OP_rot5l);
            emit_op(s, OP_rot5l);
            emit_label(s, label_next);
            /* on stack: enum_rec array idx */
            emit_op(s, OP_for_of_next);
            emit_u8(s, 2);
            emit_goto(s, OP_if_true, label_done);
            /* append element */
            /* enum_rec array idx val -> enum_rec array new_idx */
            emit_op(s, OP_define_array_el);
            emit_op(s, OP_inc);
            emit_goto(s, OP_goto, label_next);
            emit_label(s, label_done);
            /* close enumeration */
            emit_op(s, OP_drop); /* drop undef val */
            emit_op(s, OP_nip1); /* drop enum_rec */
            emit_op(s, OP_nip1);
            emit_op(s, OP_nip1);
#endif
        } else {
            need_length = TRUE;
            if (s->token.val != ',') {
                if (js_parse_assign_expr(s))
                    return -1;
                /* a idx val */
                emit_op(s, OP_define_array_el);
                need_length = FALSE;
            }
            emit_op(s, OP_inc);
        }
        if (s->token.val != ',')
            break;
        if (next_token(s))
            return -1;
    }
    if (need_length) {
        /* Set the length: cannot use OP_define_field because
           length is not configurable */
        emit_op(s, OP_dup1);    /* array length - array array length */
        emit_op(s, OP_put_field);
        emit_atom(s, JS_ATOM_length);
    } else {
        emit_op(s, OP_drop);    /* array length - array */
    }
done:
    return js_parse_expect(s, ']');
}

/* XXX: remove */
static BOOL has_with_scope(JSFunctionDef *s, int scope_level)
{
    /* check if scope chain contains a with statement */
    while (s) {
        int scope_idx = s->scopes[scope_level].first;
        while (scope_idx >= 0) {
            JSVarDef *vd = &s->vars[scope_idx];

            if (vd->var_name == JS_ATOM__with_)
                return TRUE;
            scope_idx = vd->scope_next;
        }
        /* check parent scopes */
        scope_level = s->parent_scope_level;
        s = s->parent;
    }
    return FALSE;
}

[[nodiscard]] static int get_lvalue(JSParseState *s, int *popcode, int *pscope,
                                  JSAtom *pname, int *plabel, int *pdepth, BOOL keep,
                                  int tok)
{
    JSFunctionDef *fd;
    int opcode, scope, label, depth;
    JSAtom name;

    /* we check the last opcode to get the lvalue type */
    fd = s->cur_func;
    scope = 0;
    name = JS_ATOM_NULL;
    label = -1;
    depth = 0;
    switch(opcode = get_prev_opcode(fd)) {
    case OP_scope_get_var:
        name = get_u32(fd->byte_code.buf + fd->last_opcode_pos + 1);
        scope = get_u16(fd->byte_code.buf + fd->last_opcode_pos + 5);
        if ((name == JS_ATOM_arguments || name == JS_ATOM_eval) &&
            (fd->js_mode & JS_MODE_STRICT)) {
            return js_parse_error(s, "invalid lvalue in strict mode");
        }
        if (name == JS_ATOM_this || name == JS_ATOM_new_target)
            goto invalid_lvalue;
        depth = 2;  /* will generate OP_get_ref_value */
        break;
    case OP_get_field:
        name = get_u32(fd->byte_code.buf + fd->last_opcode_pos + 1);
        depth = 1;
        break;
    case OP_scope_get_private_field:
        name = get_u32(fd->byte_code.buf + fd->last_opcode_pos + 1);
        scope = get_u16(fd->byte_code.buf + fd->last_opcode_pos + 5);
        depth = 1;
        break;
    case OP_get_array_el:
        depth = 2;
        break;
    case OP_get_super_value:
        depth = 3;
        break;
    default:
    invalid_lvalue:
        if (tok == TOK_FOR) {
            return js_parse_error(s, "invalid for in/of left hand-side");
        } else if (tok == TOK_INC || tok == TOK_DEC) {
            return js_parse_error(s, "invalid increment/decrement operand");
        } else if (tok == '[' || tok == '{') {
            return js_parse_error(s, "invalid destructuring target");
        } else {
            return js_parse_error(s, "invalid assignment left-hand side");
        }
    }
    /* remove the last opcode */
    fd->byte_code.size = fd->last_opcode_pos;
    fd->last_opcode_pos = -1;

    if (keep) {
        /* get the value but keep the object/fields on the stack */
        switch(opcode) {
        case OP_scope_get_var:
            label = new_label(s);
            emit_op(s, OP_scope_make_ref);
            emit_atom(s, name);
            emit_u32(s, label);
            emit_u16(s, scope);
            update_label(fd, label, 1);
            emit_op(s, OP_get_ref_value);
            opcode = OP_get_ref_value;
            break;
        case OP_get_field:
            emit_op(s, OP_get_field2);
            emit_atom(s, name);
            break;
        case OP_scope_get_private_field:
            emit_op(s, OP_scope_get_private_field2);
            emit_atom(s, name);
            emit_u16(s, scope);
            break;
        case OP_get_array_el:
            /* XXX: replace by a single opcode ? */
            emit_op(s, OP_to_propkey2);
            emit_op(s, OP_dup2);
            emit_op(s, OP_get_array_el);
            break;
        case OP_get_super_value:
            emit_op(s, OP_to_propkey);
            emit_op(s, OP_dup3);
            emit_op(s, OP_get_super_value);
            break;
        default:
            abort();
        }
    } else {
        switch(opcode) {
        case OP_scope_get_var:
            label = new_label(s);
            emit_op(s, OP_scope_make_ref);
            emit_atom(s, name);
            emit_u32(s, label);
            emit_u16(s, scope);
            update_label(fd, label, 1);
            opcode = OP_get_ref_value;
            break;
        case OP_get_array_el:
            emit_op(s, OP_to_propkey2);
            break;
        case OP_get_super_value:
            emit_op(s, OP_to_propkey);
            break;
        }
    }

    *popcode = opcode;
    *pscope = scope;
    /* name has refcount for OP_get_field and OP_get_ref_value,
       and JS_ATOM_NULL for other opcodes */
    *pname = name;
    *plabel = label;
    if (pdepth)
        *pdepth = depth;
    return 0;
}

typedef enum {
    PUT_LVALUE_NOKEEP, /* [depth] v -> */
    PUT_LVALUE_NOKEEP_DEPTH, /* [depth] v -> , keep depth (currently
                                just disable optimizations) */
    PUT_LVALUE_KEEP_TOP,  /* [depth] v -> v */
    PUT_LVALUE_KEEP_SECOND, /* [depth] v0 v -> v0 */
    PUT_LVALUE_NOKEEP_BOTTOM, /* v [depth] -> */
} PutLValueEnum;

/* name has a live reference. 'is_let' is only used with opcode =
   OP_scope_get_var which is never generated by get_lvalue(). */
static void put_lvalue(JSParseState *s, int opcode, int scope,
                       JSAtom name, int label, PutLValueEnum special,
                       BOOL is_let)
{
    switch(opcode) {
    case OP_get_field:
    case OP_scope_get_private_field:
        /* depth = 1 */
        switch(special) {
        case PUT_LVALUE_NOKEEP:
        case PUT_LVALUE_NOKEEP_DEPTH:
            break;
        case PUT_LVALUE_KEEP_TOP:
            emit_op(s, OP_insert2); /* obj v -> v obj v */
            break;
        case PUT_LVALUE_KEEP_SECOND:
            emit_op(s, OP_perm3); /* obj v0 v -> v0 obj v */
            break;
        case PUT_LVALUE_NOKEEP_BOTTOM:
            emit_op(s, OP_swap);
            break;
        default:
            abort();
        }
        break;
    case OP_get_array_el:
    case OP_get_ref_value:
        /* depth = 2 */
        if (opcode == OP_get_ref_value) {
            JS_FreeAtom(s->ctx, name);
            emit_label(s, label);
        }
        switch(special) {
        case PUT_LVALUE_NOKEEP:
            emit_op(s, OP_nop); /* will trigger optimization */
            break;
        case PUT_LVALUE_NOKEEP_DEPTH:
            break;
        case PUT_LVALUE_KEEP_TOP:
            emit_op(s, OP_insert3); /* obj prop v -> v obj prop v */
            break;
        case PUT_LVALUE_KEEP_SECOND:
            emit_op(s, OP_perm4); /* obj prop v0 v -> v0 obj prop v */
            break;
        case PUT_LVALUE_NOKEEP_BOTTOM:
            emit_op(s, OP_rot3l);
            break;
        default:
            abort();
        }
        break;
    case OP_get_super_value:
        /* depth = 3 */
        switch(special) {
        case PUT_LVALUE_NOKEEP:
        case PUT_LVALUE_NOKEEP_DEPTH:
            break;
        case PUT_LVALUE_KEEP_TOP:
            emit_op(s, OP_insert4); /* this obj prop v -> v this obj prop v */
            break;
        case PUT_LVALUE_KEEP_SECOND:
            emit_op(s, OP_perm5); /* this obj prop v0 v -> v0 this obj prop v */
            break;
        case PUT_LVALUE_NOKEEP_BOTTOM:
            emit_op(s, OP_rot4l);
            break;
        default:
            abort();
        }
        break;
    default:
        break;
    }

    switch(opcode) {
    case OP_scope_get_var:  /* val -- */
        assert(special == PUT_LVALUE_NOKEEP ||
               special == PUT_LVALUE_NOKEEP_DEPTH);
        emit_op(s, is_let ? OP_scope_put_var_init : OP_scope_put_var);
        emit_u32(s, name);  /* has refcount */
        emit_u16(s, scope);
        break;
    case OP_get_field:
        emit_op(s, OP_put_field);
        emit_u32(s, name);  /* name has refcount */
        break;
    case OP_scope_get_private_field:
        emit_op(s, OP_scope_put_private_field);
        emit_u32(s, name);  /* name has refcount */
        emit_u16(s, scope);
        break;
    case OP_get_array_el:
        emit_op(s, OP_put_array_el);
        break;
    case OP_get_ref_value:
        emit_op(s, OP_put_ref_value);
        break;
    case OP_get_super_value:
        emit_op(s, OP_put_super_value);
        break;
    default:
        abort();
    }
}

[[nodiscard]] static int js_parse_expr_paren(JSParseState *s)
{
    if (js_parse_expect(s, '('))
        return -1;
    if (js_parse_expr(s))
        return -1;
    if (js_parse_expect(s, ')'))
        return -1;
    return 0;
}

static int js_unsupported_keyword(JSParseState *s, JSAtom atom)
{
    char buf[ATOM_GET_STR_BUF_SIZE];
    return js_parse_error(s, "unsupported keyword: %s",
                          JS_AtomGetStr(s->ctx, buf, sizeof(buf), atom));
}

[[nodiscard]] static int js_define_var(JSParseState *s, JSAtom name, int tok)
{
    JSFunctionDef *fd = s->cur_func;
    JSVarDefEnum var_def_type;

    if (name == JS_ATOM_yield && fd->func_kind == JS_FUNC_GENERATOR) {
        return js_parse_error(s, "yield is a reserved identifier");
    }
    if ((name == JS_ATOM_arguments || name == JS_ATOM_eval)
    &&  (fd->js_mode & JS_MODE_STRICT)) {
        return js_parse_error(s, "invalid variable name in strict mode");
    }
    if ((name == JS_ATOM_let || name == JS_ATOM_undefined)
    &&  (tok == TOK_LET || tok == TOK_CONST)) {
        return js_parse_error(s, "invalid lexical variable name");
    }
    switch(tok) {
    case TOK_LET:
        var_def_type = JS_VAR_DEF_LET;
        break;
    case TOK_CONST:
        var_def_type = JS_VAR_DEF_CONST;
        break;
    case TOK_VAR:
        var_def_type = JS_VAR_DEF_VAR;
        break;
    case TOK_CATCH:
        var_def_type = JS_VAR_DEF_CATCH;
        break;
    default:
        abort();
    }
    if (define_var(s, fd, name, var_def_type) < 0)
        return -1;
    return 0;
}

static void js_emit_spread_code(JSParseState *s, int depth)
{
    int label_rest_next, label_rest_done;

    /* XXX: could check if enum object is an actual array and optimize
       slice extraction. enumeration record and target array are in a
       different order from OP_append case. */
    /* enum_rec xxx -- enum_rec xxx array 0 */
    emit_op(s, OP_array_from);
    emit_u16(s, 0);
    emit_op(s, OP_push_i32);
    emit_u32(s, 0);
    emit_label(s, label_rest_next = new_label(s));
    emit_op(s, OP_for_of_next);
    emit_u8(s, 2 + depth);
    label_rest_done = emit_goto(s, OP_if_true, -1);
    /* array idx val -- array idx */
    emit_op(s, OP_define_array_el);
    emit_op(s, OP_inc);
    emit_goto(s, OP_goto, label_rest_next);
    emit_label(s, label_rest_done);
    /* enum_rec xxx array idx undef -- enum_rec xxx array */
    emit_op(s, OP_drop);
    emit_op(s, OP_drop);
}

static int js_parse_check_duplicate_parameter(JSParseState *s, JSAtom name)
{
    /* Check for duplicate parameter names */
    JSFunctionDef *fd = s->cur_func;
    int i;
    for (i = 0; i < fd->arg_count; i++) {
        if (fd->args[i].var_name == name)
            goto duplicate;
    }
    for (i = 0; i < fd->var_count; i++) {
        if (fd->vars[i].var_name == name)
            goto duplicate;
    }
    return 0;

duplicate:
    return js_parse_error(s, "duplicate parameter names not allowed in this context");
}

static JSAtom js_parse_destructuring_var(JSParseState *s, int tok, int is_arg)
{
    JSAtom name;

    if (!(s->token.val == TOK_IDENT && !s->token.u.ident.is_reserved)
    ||  ((s->cur_func->js_mode & JS_MODE_STRICT) &&
         (s->token.u.ident.atom == JS_ATOM_eval || s->token.u.ident.atom == JS_ATOM_arguments))) {
        js_parse_error(s, "invalid destructuring target");
        return JS_ATOM_NULL;
    }
    name = JS_DupAtom(s->ctx, s->token.u.ident.atom);
    if (is_arg && js_parse_check_duplicate_parameter(s, name))
        goto fail;
    if (next_token(s))
        goto fail;

    return name;
fail:
    JS_FreeAtom(s->ctx, name);
    return JS_ATOM_NULL;
}

/* Return -1 if error, 0 if no initializer, 1 if an initializer is
   present at the top level. */
static int js_parse_destructuring_element(JSParseState *s, int tok, int is_arg,
                                        int hasval, int has_ellipsis,
                                        BOOL allow_initializer)
{
    int label_parse, label_assign, label_done, label_lvalue = 0, depth_lvalue;
    int start_addr, assign_addr;
    JSAtom prop_name, var_name;
    int opcode, scope, tok1, skip_bits;
    BOOL has_initializer;

    if (has_ellipsis < 0) {
        /* pre-parse destructuration target for spread detection */
        js_parse_skip_parens_token(s, &skip_bits, FALSE);
        has_ellipsis = skip_bits & SKIP_HAS_ELLIPSIS;
    }

    label_parse = new_label(s);
    label_assign = new_label(s);

    start_addr = s->cur_func->byte_code.size;
    if (hasval) {
        /* consume value from the stack */
        emit_op(s, OP_dup);
        emit_op(s, OP_undefined);
        emit_op(s, OP_strict_eq);
        emit_goto(s, OP_if_true, label_parse);
        emit_label(s, label_assign);
    } else {
        emit_goto(s, OP_goto, label_parse);
        emit_label(s, label_assign);
        /* leave value on the stack */
        emit_op(s, OP_dup);
    }
    assign_addr = s->cur_func->byte_code.size;
    if (s->token.val == '{') {
        if (next_token(s))
            return -1;
        /* throw an exception if the value cannot be converted to an object */
        emit_op(s, OP_to_object);
        if (has_ellipsis) {
            /* add excludeList on stack just below src object */
            emit_op(s, OP_object);
            emit_op(s, OP_swap);
        }
        while (s->token.val != '}') {
            int prop_type;
            if (s->token.val == TOK_ELLIPSIS) {
                if (!has_ellipsis) {
                    JS_ThrowInternalError(s->ctx, "unexpected ellipsis token");
                    return -1;
                }
                if (next_token(s))
                    return -1;
                if (tok) {
                    var_name = js_parse_destructuring_var(s, tok, is_arg);
                    if (var_name == JS_ATOM_NULL)
                        return -1;
                    opcode = OP_scope_get_var;
                    scope = s->cur_func->scope_level;
                    label_lvalue = -1;
                    depth_lvalue = 0;
                } else {
                    if (js_parse_left_hand_side_expr(s))
                        return -1;

                    if (get_lvalue(s, &opcode, &scope, &var_name,
                                   &label_lvalue, &depth_lvalue, FALSE, '{'))
                        return -1;
                }
                if (s->token.val != '}') {
                    js_parse_error(s, "assignment rest property must be last");
                    goto var_error;
                }
                emit_op(s, OP_object);  /* target */
                emit_op(s, OP_copy_data_properties);
                emit_u8(s, 0 | ((depth_lvalue + 1) << 2) | ((depth_lvalue + 2) << 5));
                goto set_val;
            }
            prop_type = js_parse_property_name(s, &prop_name, FALSE, TRUE, FALSE);
            if (prop_type < 0)
                return -1;
            var_name = JS_ATOM_NULL;
            opcode = OP_scope_get_var;
            scope = s->cur_func->scope_level;
            label_lvalue = -1;
            depth_lvalue = 0;
            if (prop_type == PROP_TYPE_IDENT) {
                if (next_token(s))
                    goto prop_error;
                if ((s->token.val == '[' || s->token.val == '{')
                    &&  ((tok1 = js_parse_skip_parens_token(s, &skip_bits, FALSE)) == ',' ||
                         tok1 == '=' || tok1 == '}')) {
                    if (prop_name == JS_ATOM_NULL) {
                        /* computed property name on stack */
                        if (has_ellipsis) {
                            /* define the property in excludeList */
                            emit_op(s, OP_to_propkey); /* avoid calling ToString twice */
                            emit_op(s, OP_perm3); /* TOS: src excludeList prop */
                            emit_op(s, OP_null); /* TOS: src excludeList prop null */
                            emit_op(s, OP_define_array_el); /* TOS: src excludeList prop */
                            emit_op(s, OP_perm3); /* TOS: excludeList src prop */
                        }
                        /* get the computed property from the source object */
                        emit_op(s, OP_get_array_el2);
                    } else {
                        /* named property */
                        if (has_ellipsis) {
                            /* define the property in excludeList */
                            emit_op(s, OP_swap); /* TOS: src excludeList */
                            emit_op(s, OP_null); /* TOS: src excludeList null */
                            emit_op(s, OP_define_field); /* TOS: src excludeList */
                            emit_atom(s, prop_name);
                            emit_op(s, OP_swap); /* TOS: excludeList src */
                        }
                        /* get the named property from the source object */
                        emit_op(s, OP_get_field2);
                        emit_u32(s, prop_name);
                    }
                    if (js_parse_destructuring_element(s, tok, is_arg, TRUE, -1, TRUE) < 0)
                        return -1;
                    if (s->token.val == '}')
                        break;
                    /* accept a trailing comma before the '}' */
                    if (js_parse_expect(s, ','))
                        return -1;
                    continue;
                }
                if (prop_name == JS_ATOM_NULL) {
                    emit_op(s, OP_to_propkey2);
                    if (has_ellipsis) {
                        /* define the property in excludeList */
                        emit_op(s, OP_perm3);
                        emit_op(s, OP_null);
                        emit_op(s, OP_define_array_el);
                        emit_op(s, OP_perm3);
                    }
                    /* source prop -- source source prop */
                    emit_op(s, OP_dup1);
                } else {
                    if (has_ellipsis) {
                        /* define the property in excludeList */
                        emit_op(s, OP_swap);
                        emit_op(s, OP_null);
                        emit_op(s, OP_define_field);
                        emit_atom(s, prop_name);
                        emit_op(s, OP_swap);
                    }
                    /* source -- source source */
                    emit_op(s, OP_dup);
                }
                if (tok) {
                    var_name = js_parse_destructuring_var(s, tok, is_arg);
                    if (var_name == JS_ATOM_NULL)
                        goto prop_error;
                } else {
                    if (js_parse_left_hand_side_expr(s))
                        goto prop_error;
                lvalue:
                    if (get_lvalue(s, &opcode, &scope, &var_name,
                                   &label_lvalue, &depth_lvalue, FALSE, '{'))
                        goto prop_error;
                    /* swap ref and lvalue object if any */
                    if (prop_name == JS_ATOM_NULL) {
                        switch(depth_lvalue) {
                        case 1:
                            /* source prop x -> x source prop */
                            emit_op(s, OP_rot3r);
                            break;
                        case 2:
                            /* source prop x y -> x y source prop */
                            emit_op(s, OP_swap2);   /* t p2 s p1 */
                            break;
                        case 3:
                            /* source prop x y z -> x y z source prop */
                            emit_op(s, OP_rot5l);
                            emit_op(s, OP_rot5l);
                            break;
                        }
                    } else {
                        switch(depth_lvalue) {
                        case 1:
                            /* source x -> x source */
                            emit_op(s, OP_swap);
                            break;
                        case 2:
                            /* source x y -> x y source */
                            emit_op(s, OP_rot3l);
                            break;
                        case 3:
                            /* source x y z -> x y z source */
                            emit_op(s, OP_rot4l);
                            break;
                        }
                    }
                }
                if (prop_name == JS_ATOM_NULL) {
                    /* computed property name on stack */
                    /* XXX: should have OP_get_array_el2x with depth */
                    /* source prop -- val */
                    emit_op(s, OP_get_array_el);
                } else {
                    /* named property */
                    /* XXX: should have OP_get_field2x with depth */
                    /* source -- val */
                    emit_op(s, OP_get_field);
                    emit_u32(s, prop_name);
                }
            } else {
                /* prop_type = PROP_TYPE_VAR, cannot be a computed property */
                if (is_arg && js_parse_check_duplicate_parameter(s, prop_name))
                    goto prop_error;
                if ((s->cur_func->js_mode & JS_MODE_STRICT) &&
                    (prop_name == JS_ATOM_eval || prop_name == JS_ATOM_arguments)) {
                    js_parse_error(s, "invalid destructuring target");
                    goto prop_error;
                }
                if (has_ellipsis) {
                    /* define the property in excludeList */
                    emit_op(s, OP_swap);
                    emit_op(s, OP_null);
                    emit_op(s, OP_define_field);
                    emit_atom(s, prop_name);
                    emit_op(s, OP_swap);
                }
                if (!tok || tok == TOK_VAR) {
                    /* generate reference */
                    /* source -- source source */
                    emit_op(s, OP_dup);
                    emit_op(s, OP_scope_get_var);
                    emit_atom(s, prop_name);
                    emit_u16(s, s->cur_func->scope_level);
                    goto lvalue;
                }
                var_name = JS_DupAtom(s->ctx, prop_name);
                /* source -- source val */
                emit_op(s, OP_get_field2);
                emit_u32(s, prop_name);
            }
        set_val:
            if (tok) {
                if (js_define_var(s, var_name, tok))
                    goto var_error;
                scope = s->cur_func->scope_level;
            }
            if (s->token.val == '=') {  /* handle optional default value */
                int label_hasval;
                emit_op(s, OP_dup);
                emit_op(s, OP_undefined);
                emit_op(s, OP_strict_eq);
                label_hasval = emit_goto(s, OP_if_false, -1);
                if (next_token(s))
                    goto var_error;
                emit_op(s, OP_drop);
                if (js_parse_assign_expr(s))
                    goto var_error;
                if (opcode == OP_scope_get_var || opcode == OP_get_ref_value)
                    set_object_name(s, var_name);
                emit_label(s, label_hasval);
            }
            /* store value into lvalue object */
            put_lvalue(s, opcode, scope, var_name, label_lvalue,
                       PUT_LVALUE_NOKEEP_DEPTH,
                       (tok == TOK_CONST || tok == TOK_LET));
            if (s->token.val == '}')
                break;
            /* accept a trailing comma before the '}' */
            if (js_parse_expect(s, ','))
                return -1;
        }
        /* drop the source object */
        emit_op(s, OP_drop);
        if (has_ellipsis) {
            emit_op(s, OP_drop); /* pop excludeList */
        }
        if (next_token(s))
            return -1;
    } else if (s->token.val == '[') {
        BOOL has_spread;
        int enum_depth;
        BlockEnv block_env;

        if (next_token(s))
            return -1;
        /* the block environment is only needed in generators in case
           'yield' triggers a 'return' */
        push_break_entry(s->cur_func, &block_env,
                         JS_ATOM_NULL, -1, -1, 2);
        block_env.has_iterator = TRUE;
        emit_op(s, OP_for_of_start);
        has_spread = FALSE;
        while (s->token.val != ']') {
            /* get the next value */
            if (s->token.val == TOK_ELLIPSIS) {
                if (next_token(s))
                    return -1;
                if (s->token.val == ',' || s->token.val == ']')
                    return js_parse_error(s, "missing binding pattern...");
                has_spread = TRUE;
            }
            if (s->token.val == ',') {
                /* do nothing, skip the value, has_spread is false */
                emit_op(s, OP_for_of_next);
                emit_u8(s, 0);
                emit_op(s, OP_drop);
                emit_op(s, OP_drop);
            } else if ((s->token.val == '[' || s->token.val == '{')
                   &&  ((tok1 = js_parse_skip_parens_token(s, &skip_bits, FALSE)) == ',' ||
                        tok1 == '=' || tok1 == ']')) {
                if (has_spread) {
                    if (tok1 == '=')
                        return js_parse_error(s, "rest element cannot have a default value");
                    js_emit_spread_code(s, 0);
                } else {
                    emit_op(s, OP_for_of_next);
                    emit_u8(s, 0);
                    emit_op(s, OP_drop);
                }
                if (js_parse_destructuring_element(s, tok, is_arg, TRUE, skip_bits & SKIP_HAS_ELLIPSIS, TRUE) < 0)
                    return -1;
            } else {
                var_name = JS_ATOM_NULL;
                enum_depth = 0;
                if (tok) {
                    var_name = js_parse_destructuring_var(s, tok, is_arg);
                    if (var_name == JS_ATOM_NULL)
                        goto var_error;
                    if (js_define_var(s, var_name, tok))
                        goto var_error;
                    opcode = OP_scope_get_var;
                    scope = s->cur_func->scope_level;
                } else {
                    if (js_parse_left_hand_side_expr(s))
                        return -1;
                    if (get_lvalue(s, &opcode, &scope, &var_name,
                                   &label_lvalue, &enum_depth, FALSE, '[')) {
                        return -1;
                    }
                }
                if (has_spread) {
                    js_emit_spread_code(s, enum_depth);
                } else {
                    emit_op(s, OP_for_of_next);
                    emit_u8(s, enum_depth);
                    emit_op(s, OP_drop);
                }
                if (s->token.val == '=' && !has_spread) {
                    /* handle optional default value */
                    int label_hasval;
                    emit_op(s, OP_dup);
                    emit_op(s, OP_undefined);
                    emit_op(s, OP_strict_eq);
                    label_hasval = emit_goto(s, OP_if_false, -1);
                    if (next_token(s))
                        goto var_error;
                    emit_op(s, OP_drop);
                    if (js_parse_assign_expr(s))
                        goto var_error;
                    if (opcode == OP_scope_get_var || opcode == OP_get_ref_value)
                        set_object_name(s, var_name);
                    emit_label(s, label_hasval);
                }
                /* store value into lvalue object */
                put_lvalue(s, opcode, scope, var_name,
                           label_lvalue, PUT_LVALUE_NOKEEP_DEPTH,
                           (tok == TOK_CONST || tok == TOK_LET));
            }
            if (s->token.val == ']')
                break;
            if (has_spread)
                return js_parse_error(s, "rest element must be the last one");
            /* accept a trailing comma before the ']' */
            if (js_parse_expect(s, ','))
                return -1;
        }
        /* close iterator object:
           if completed, enum_obj has been replaced by undefined */
        emit_op(s, OP_iterator_close);
        pop_break_entry(s->cur_func);
        if (next_token(s))
            return -1;
    } else {
        return js_parse_error(s, "invalid assignment syntax");
    }
    if (s->token.val == '=' && allow_initializer) {
        label_done = emit_goto(s, OP_goto, -1);
        if (next_token(s))
            return -1;
        emit_label(s, label_parse);
        if (hasval)
            emit_op(s, OP_drop);
        if (js_parse_assign_expr(s))
            return -1;
        emit_goto(s, OP_goto, label_assign);
        emit_label(s, label_done);
        has_initializer = TRUE;
    } else {
        /* normally hasval is true except if
           js_parse_skip_parens_token() was wrong in the parsing */
        //        assert(hasval);
        if (!hasval) {
            js_parse_error(s, "too complicated destructuring expression");
            return -1;
        }
        /* remove test and decrement label ref count */
        memset(s->cur_func->byte_code.buf + start_addr, OP_nop,
               assign_addr - start_addr);
        s->cur_func->label_slots[label_parse].ref_count--;
        has_initializer = FALSE;
    }
    return has_initializer;

 prop_error:
    JS_FreeAtom(s->ctx, prop_name);
 var_error:
    JS_FreeAtom(s->ctx, var_name);
    return -1;
}

typedef enum FuncCallType {
    FUNC_CALL_NORMAL,
    FUNC_CALL_NEW,
    FUNC_CALL_SUPER_CTOR,
    FUNC_CALL_TEMPLATE,
} FuncCallType;

static void optional_chain_test(JSParseState *s, int *poptional_chaining_label,
                                int drop_count)
{
    int label_next, i;
    if (*poptional_chaining_label < 0)
        *poptional_chaining_label = new_label(s);
   /* XXX: could be more efficient with a specific opcode */
    emit_op(s, OP_dup);
    emit_op(s, OP_is_undefined_or_null);
    label_next = emit_goto(s, OP_if_false, -1);
    for(i = 0; i < drop_count; i++)
        emit_op(s, OP_drop);
    emit_op(s, OP_undefined);
    emit_goto(s, OP_goto, *poptional_chaining_label);
    emit_label(s, label_next);
}

/* allowed parse_flags: PF_POSTFIX_CALL, PF_ARROW_FUNC */
[[nodiscard]] static int js_parse_postfix_expr(JSParseState *s, int parse_flags)
{
    FuncCallType call_type;
    int optional_chaining_label;
    BOOL accept_lparen = (parse_flags & PF_POSTFIX_CALL) != 0;

    call_type = FUNC_CALL_NORMAL;
    switch(s->token.val) {
    case TOK_NUMBER:
        {
            JSValue val;
            val = s->token.u.num.val;

            if (JS_VALUE_GET_TAG(val) == JS_TAG_INT) {
                emit_op(s, OP_push_i32);
                emit_u32(s, JS_VALUE_GET_INT(val));
            } else
#ifdef CONFIG_BIGNUM
            if (JS_VALUE_GET_TAG(val) == JS_TAG_BIG_FLOAT) {
                slimb_t e;
                int ret;

                /* need a runtime conversion */
                /* XXX: could add a cache and/or do it once at
                   the start of the function */
                if (emit_push_const(s, val, 0) < 0)
                    return -1;
                e = s->token.u.num.exponent;
                if (e == (int32_t)e) {
                    emit_op(s, OP_push_i32);
                    emit_u32(s, e);
                } else {
                    val = JS_NewBigInt64_1(s->ctx, e);
                    if (JS_IsException(val))
                        return -1;
                    ret = emit_push_const(s, val, 0);
                    JS_FreeValue(s->ctx, val);
                    if (ret < 0)
                        return -1;
                }
                emit_op(s, OP_mul_pow10);
            } else
#endif
            {
                if (emit_push_const(s, val, 0) < 0)
                    return -1;
            }
        }
        if (next_token(s))
            return -1;
        break;
    case TOK_TEMPLATE:
        if (js_parse_template(s, 0, NULL))
            return -1;
        break;
    case TOK_STRING:
        if (emit_push_const(s, s->token.u.str.str, 1))
            return -1;
        if (next_token(s))
            return -1;
        break;

    case TOK_DIV_ASSIGN:
        s->buf_ptr -= 2;
        goto parse_regexp;
    case '/':
        s->buf_ptr--;
    parse_regexp:
        {
            JSValue str;
            int ret, backtrace_flags;
            if (!s->ctx->compile_regexp)
                return js_parse_error(s, "RegExp are not supported");
            /* the previous token is '/' or '/=', so no need to free */
            if (js_parse_regexp(s))
                return -1;
            ret = emit_push_const(s, s->token.u.regexp.body, 0);
            str = s->ctx->compile_regexp(s->ctx, s->token.u.regexp.body,
                                         s->token.u.regexp.flags);
            if (JS_IsException(str)) {
                /* add the line number info */
                backtrace_flags = 0;
                if (s->cur_func && s->cur_func->backtrace_barrier)
                    backtrace_flags = JS_BACKTRACE_FLAG_SINGLE_LEVEL;
                build_backtrace(s->ctx, s->ctx->rt->current_exception,
                                s->filename, s->token.line_num,
                                backtrace_flags);
                return -1;
            }
            ret = emit_push_const(s, str, 0);
            JS_FreeValue(s->ctx, str);
            if (ret)
                return -1;
            /* we use a specific opcode to be sure the correct
               function is called (otherwise the bytecode would have
               to be verified by the RegExp constructor) */
            emit_op(s, OP_regexp);
            if (next_token(s))
                return -1;
        }
        break;
    case '(':
        if ((parse_flags & PF_ARROW_FUNC) &&
            js_parse_skip_parens_token(s, NULL, TRUE) == TOK_ARROW) {
            if (js_parse_function_decl(s, JS_PARSE_FUNC_ARROW,
                                       JS_FUNC_NORMAL, JS_ATOM_NULL,
                                       s->token.ptr, s->token.line_num))
                return -1;
        } else {
            if (js_parse_expr_paren(s))
                return -1;
        }
        break;
    case TOK_FUNCTION:
        if (js_parse_function_decl(s, JS_PARSE_FUNC_EXPR,
                                   JS_FUNC_NORMAL, JS_ATOM_NULL,
                                   s->token.ptr, s->token.line_num))
            return -1;
        break;
    case TOK_CLASS:
        if (js_parse_class(s, TRUE, JS_PARSE_EXPORT_NONE))
            return -1;
        break;
    case TOK_NULL:
        if (next_token(s))
            return -1;
        emit_op(s, OP_null);
        break;
    case TOK_THIS:
        if (next_token(s))
            return -1;
        emit_op(s, OP_scope_get_var);
        emit_atom(s, JS_ATOM_this);
        emit_u16(s, 0);
        break;
    case TOK_FALSE:
        if (next_token(s))
            return -1;
        emit_op(s, OP_push_false);
        break;
    case TOK_TRUE:
        if (next_token(s))
            return -1;
        emit_op(s, OP_push_true);
        break;
    case TOK_IDENT:
        {
            JSAtom name;
            if (s->token.u.ident.is_reserved) {
                return js_parse_error_reserved_identifier(s);
            }
            if ((parse_flags & PF_ARROW_FUNC) &&
                peek_token(s, TRUE) == TOK_ARROW) {
                if (js_parse_function_decl(s, JS_PARSE_FUNC_ARROW,
                                           JS_FUNC_NORMAL, JS_ATOM_NULL,
                                           s->token.ptr, s->token.line_num))
                    return -1;
            } else if (token_is_pseudo_keyword(s, JS_ATOM_async) &&
                       peek_token(s, TRUE) != '\n') {
                const uint8_t *source_ptr;
                int source_line_num;

                source_ptr = s->token.ptr;
                source_line_num = s->token.line_num;
                if (next_token(s))
                    return -1;
                if (s->token.val == TOK_FUNCTION) {
                    if (js_parse_function_decl(s, JS_PARSE_FUNC_EXPR,
                                               JS_FUNC_ASYNC, JS_ATOM_NULL,
                                               source_ptr, source_line_num))
                        return -1;
                } else if ((parse_flags & PF_ARROW_FUNC) &&
                           ((s->token.val == '(' &&
                             js_parse_skip_parens_token(s, NULL, TRUE) == TOK_ARROW) ||
                            (s->token.val == TOK_IDENT && !s->token.u.ident.is_reserved &&
                             peek_token(s, TRUE) == TOK_ARROW))) {
                    if (js_parse_function_decl(s, JS_PARSE_FUNC_ARROW,
                                               JS_FUNC_ASYNC, JS_ATOM_NULL,
                                               source_ptr, source_line_num))
                        return -1;
                } else {
                    name = JS_DupAtom(s->ctx, JS_ATOM_async);
                    goto do_get_var;
                }
            } else {
                if (s->token.u.ident.atom == JS_ATOM_arguments &&
                    !s->cur_func->arguments_allowed) {
                    js_parse_error(s, "'arguments' identifier is not allowed in class field initializer");
                    return -1;
                }
                name = JS_DupAtom(s->ctx, s->token.u.ident.atom);
                if (next_token(s))  /* update line number before emitting code */
                    return -1;
            do_get_var:
                emit_op(s, OP_scope_get_var);
                emit_u32(s, name);
                emit_u16(s, s->cur_func->scope_level);
            }
        }
        break;
    case '{':
    case '[':
        {
            int skip_bits;
            if (js_parse_skip_parens_token(s, &skip_bits, FALSE) == '=') {
                if (js_parse_destructuring_element(s, 0, 0, FALSE, skip_bits & SKIP_HAS_ELLIPSIS, TRUE) < 0)
                    return -1;
            } else {
                if (s->token.val == '{') {
                    if (js_parse_object_literal(s))
                        return -1;
                } else {
                    if (js_parse_array_literal(s))
                        return -1;
                }
            }
        }
        break;
    case TOK_NEW:
        if (next_token(s))
            return -1;
        if (s->token.val == '.') {
            if (next_token(s))
                return -1;
            if (!token_is_pseudo_keyword(s, JS_ATOM_target))
                return js_parse_error(s, "expecting target");
            if (!s->cur_func->new_target_allowed)
                return js_parse_error(s, "new.target only allowed within functions");
            if (next_token(s))
                return -1;
            emit_op(s, OP_scope_get_var);
            emit_atom(s, JS_ATOM_new_target);
            emit_u16(s, 0);
        } else {
            if (js_parse_postfix_expr(s, 0))
                return -1;
            accept_lparen = TRUE;
            if (s->token.val != '(') {
                /* new operator on an object */
                emit_op(s, OP_dup);
                emit_op(s, OP_call_constructor);
                emit_u16(s, 0);
            } else {
                call_type = FUNC_CALL_NEW;
            }
        }
        break;
    case TOK_SUPER:
        if (next_token(s))
            return -1;
        if (s->token.val == '(') {
            if (!s->cur_func->super_call_allowed)
                return js_parse_error(s, "super() is only valid in a derived class constructor");
            call_type = FUNC_CALL_SUPER_CTOR;
        } else if (s->token.val == '.' || s->token.val == '[') {
            if (!s->cur_func->super_allowed)
                return js_parse_error(s, "'super' is only valid in a method");
            emit_op(s, OP_scope_get_var);
            emit_atom(s, JS_ATOM_this);
            emit_u16(s, 0);
            emit_op(s, OP_scope_get_var);
            emit_atom(s, JS_ATOM_home_object);
            emit_u16(s, 0);
            emit_op(s, OP_get_super);
        } else {
            return js_parse_error(s, "invalid use of 'super'");
        }
        break;
    case TOK_IMPORT:
        if (next_token(s))
            return -1;
        if (s->token.val == '.') {
            if (next_token(s))
                return -1;
            if (!token_is_pseudo_keyword(s, JS_ATOM_meta))
                return js_parse_error(s, "meta expected");
            if (!s->is_module)
                return js_parse_error(s, "import.meta only valid in module code");
            if (next_token(s))
                return -1;
            emit_op(s, OP_special_object);
            emit_u8(s, OP_SPECIAL_OBJECT_IMPORT_META);
        } else {
            if (js_parse_expect(s, '('))
                return -1;
            if (!accept_lparen)
                return js_parse_error(s, "invalid use of 'import()'");
            if (js_parse_assign_expr(s))
                return -1;
            if (js_parse_expect(s, ')'))
                return -1;
            emit_op(s, OP_import);
        }
        break;
    default:
        return js_parse_error(s, "unexpected token in expression: '%.*s'",
                              (int)(s->buf_ptr - s->token.ptr), s->token.ptr);
    }

    optional_chaining_label = -1;
    for(;;) {
        JSFunctionDef *fd = s->cur_func;
        BOOL has_optional_chain = FALSE;

        if (s->token.val == TOK_QUESTION_MARK_DOT) {
            /* optional chaining */
            if (next_token(s))
                return -1;
            has_optional_chain = TRUE;
            if (s->token.val == '(' && accept_lparen) {
                goto parse_func_call;
            } else if (s->token.val == '[') {
                goto parse_array_access;
            } else {
                goto parse_property;
            }
        } else if (s->token.val == TOK_TEMPLATE &&
                   call_type == FUNC_CALL_NORMAL) {
            if (optional_chaining_label >= 0) {
                return js_parse_error(s, "template literal cannot appear in an optional chain");
            }
            call_type = FUNC_CALL_TEMPLATE;
            goto parse_func_call2;
        } else if (s->token.val == '(' && accept_lparen) {
            int opcode, arg_count, drop_count;

            /* function call */
        parse_func_call:
            if (next_token(s))
                return -1;

            if (call_type == FUNC_CALL_NORMAL) {
            parse_func_call2:
                switch(opcode = get_prev_opcode(fd)) {
                case OP_get_field:
                    /* keep the object on the stack */
                    fd->byte_code.buf[fd->last_opcode_pos] = OP_get_field2;
                    drop_count = 2;
                    break;
                case OP_scope_get_private_field:
                    /* keep the object on the stack */
                    fd->byte_code.buf[fd->last_opcode_pos] = OP_scope_get_private_field2;
                    drop_count = 2;
                    break;
                case OP_get_array_el:
                    /* keep the object on the stack */
                    fd->byte_code.buf[fd->last_opcode_pos] = OP_get_array_el2;
                    drop_count = 2;
                    break;
                case OP_scope_get_var:
                    {
                        JSAtom name;
                        int scope;
                        name = get_u32(fd->byte_code.buf + fd->last_opcode_pos + 1);
                        scope = get_u16(fd->byte_code.buf + fd->last_opcode_pos + 5);
                        if (name == JS_ATOM_eval && call_type == FUNC_CALL_NORMAL && !has_optional_chain) {
                            /* direct 'eval' */
                            opcode = OP_eval;
                        } else {
                            /* verify if function name resolves to a simple
                               get_loc/get_arg: a function call inside a `with`
                               statement can resolve to a method call of the
                               `with` context object
                             */
                            /* XXX: always generate the OP_scope_get_ref
                               and remove it in variable resolution
                               pass ? */
                            if (has_with_scope(fd, scope)) {
                                opcode = OP_scope_get_ref;
                                fd->byte_code.buf[fd->last_opcode_pos] = opcode;
                            }
                        }
                        drop_count = 1;
                    }
                    break;
                case OP_get_super_value:
                    fd->byte_code.buf[fd->last_opcode_pos] = OP_get_array_el;
                    /* on stack: this func_obj */
                    opcode = OP_get_array_el;
                    drop_count = 2;
                    break;
                default:
                    opcode = OP_invalid;
                    drop_count = 1;
                    break;
                }
                if (has_optional_chain) {
                    optional_chain_test(s, &optional_chaining_label,
                                        drop_count);
                }
            } else {
                opcode = OP_invalid;
            }

            if (call_type == FUNC_CALL_TEMPLATE) {
                if (js_parse_template(s, 1, &arg_count))
                    return -1;
                goto emit_func_call;
            } else if (call_type == FUNC_CALL_SUPER_CTOR) {
                emit_op(s, OP_scope_get_var);
                emit_atom(s, JS_ATOM_this_active_func);
                emit_u16(s, 0);

                emit_op(s, OP_get_super);

                emit_op(s, OP_scope_get_var);
                emit_atom(s, JS_ATOM_new_target);
                emit_u16(s, 0);
            } else if (call_type == FUNC_CALL_NEW) {
                emit_op(s, OP_dup); /* new.target = function */
            }

            /* parse arguments */
            arg_count = 0;
            while (s->token.val != ')') {
                if (arg_count >= 65535) {
                    return js_parse_error(s, "Too many call arguments");
                }
                if (s->token.val == TOK_ELLIPSIS)
                    break;
                if (js_parse_assign_expr(s))
                    return -1;
                arg_count++;
                if (s->token.val == ')')
                    break;
                /* accept a trailing comma before the ')' */
                if (js_parse_expect(s, ','))
                    return -1;
            }
            if (s->token.val == TOK_ELLIPSIS) {
                emit_op(s, OP_array_from);
                emit_u16(s, arg_count);
                emit_op(s, OP_push_i32);
                emit_u32(s, arg_count);

                /* on stack: array idx */
                while (s->token.val != ')') {
                    if (s->token.val == TOK_ELLIPSIS) {
                        if (next_token(s))
                            return -1;
                        if (js_parse_assign_expr(s))
                            return -1;
#if 1
                        /* XXX: could pass is_last indicator? */
                        emit_op(s, OP_append);
#else
                        int label_next, label_done;
                        label_next = new_label(s);
                        label_done = new_label(s);
                        /* push enumerate object below array/idx pair */
                        emit_op(s, OP_for_of_start);
                        emit_op(s, OP_rot5l);
                        emit_op(s, OP_rot5l);
                        emit_label(s, label_next);
                        /* on stack: enum_rec array idx */
                        emit_op(s, OP_for_of_next);
                        emit_u8(s, 2);
                        emit_goto(s, OP_if_true, label_done);
                        /* append element */
                        /* enum_rec array idx val -> enum_rec array new_idx */
                        emit_op(s, OP_define_array_el);
                        emit_op(s, OP_inc);
                        emit_goto(s, OP_goto, label_next);
                        emit_label(s, label_done);
                        /* close enumeration, drop enum_rec and idx */
                        emit_op(s, OP_drop); /* drop undef */
                        emit_op(s, OP_nip1); /* drop enum_rec */
                        emit_op(s, OP_nip1);
                        emit_op(s, OP_nip1);
#endif
                    } else {
                        if (js_parse_assign_expr(s))
                            return -1;
                        /* array idx val */
                        emit_op(s, OP_define_array_el);
                        emit_op(s, OP_inc);
                    }
                    if (s->token.val == ')')
                        break;
                    /* accept a trailing comma before the ')' */
                    if (js_parse_expect(s, ','))
                        return -1;
                }
                if (next_token(s))
                    return -1;
                /* drop the index */
                emit_op(s, OP_drop);

                /* apply function call */
                switch(opcode) {
                case OP_get_field:
                case OP_scope_get_private_field:
                case OP_get_array_el:
                case OP_scope_get_ref:
                    /* obj func array -> func obj array */
                    emit_op(s, OP_perm3);
                    emit_op(s, OP_apply);
                    emit_u16(s, call_type == FUNC_CALL_NEW);
                    break;
                case OP_eval:
                    emit_op(s, OP_apply_eval);
                    emit_u16(s, fd->scope_level);
                    fd->has_eval_call = TRUE;
                    break;
                default:
                    if (call_type == FUNC_CALL_SUPER_CTOR) {
                        emit_op(s, OP_apply);
                        emit_u16(s, 1);
                        /* set the 'this' value */
                        emit_op(s, OP_dup);
                        emit_op(s, OP_scope_put_var_init);
                        emit_atom(s, JS_ATOM_this);
                        emit_u16(s, 0);

                        emit_class_field_init(s);
                    } else if (call_type == FUNC_CALL_NEW) {
                        /* obj func array -> func obj array */
                        emit_op(s, OP_perm3);
                        emit_op(s, OP_apply);
                        emit_u16(s, 1);
                    } else {
                        /* func array -> func undef array */
                        emit_op(s, OP_undefined);
                        emit_op(s, OP_swap);
                        emit_op(s, OP_apply);
                        emit_u16(s, 0);
                    }
                    break;
                }
            } else {
                if (next_token(s))
                    return -1;
            emit_func_call:
                switch(opcode) {
                case OP_get_field:
                case OP_scope_get_private_field:
                case OP_get_array_el:
                case OP_scope_get_ref:
                    emit_op(s, OP_call_method);
                    emit_u16(s, arg_count);
                    break;
                case OP_eval:
                    emit_op(s, OP_eval);
                    emit_u16(s, arg_count);
                    emit_u16(s, fd->scope_level);
                    fd->has_eval_call = TRUE;
                    break;
                default:
                    if (call_type == FUNC_CALL_SUPER_CTOR) {
                        emit_op(s, OP_call_constructor);
                        emit_u16(s, arg_count);

                        /* set the 'this' value */
                        emit_op(s, OP_dup);
                        emit_op(s, OP_scope_put_var_init);
                        emit_atom(s, JS_ATOM_this);
                        emit_u16(s, 0);

                        emit_class_field_init(s);
                    } else if (call_type == FUNC_CALL_NEW) {
                        emit_op(s, OP_call_constructor);
                        emit_u16(s, arg_count);
                    } else {
                        emit_op(s, OP_call);
                        emit_u16(s, arg_count);
                    }
                    break;
                }
            }
            call_type = FUNC_CALL_NORMAL;
        } else if (s->token.val == '.') {
            if (next_token(s))
                return -1;
        parse_property:
            if (s->token.val == TOK_PRIVATE_NAME) {
                /* private class field */
                if (get_prev_opcode(fd) == OP_get_super) {
                    return js_parse_error(s, "private class field forbidden after super");
                }
                if (has_optional_chain) {
                    optional_chain_test(s, &optional_chaining_label, 1);
                }
                emit_op(s, OP_scope_get_private_field);
                emit_atom(s, s->token.u.ident.atom);
                emit_u16(s, s->cur_func->scope_level);
            } else {
                if (!token_is_ident(s->token.val)) {
                    return js_parse_error(s, "expecting field name");
                }
                if (get_prev_opcode(fd) == OP_get_super) {
                    JSValue val;
                    int ret;
                    val = JS_AtomToValue(s->ctx, s->token.u.ident.atom);
                    ret = emit_push_const(s, val, 1);
                    JS_FreeValue(s->ctx, val);
                    if (ret)
                        return -1;
                    emit_op(s, OP_get_super_value);
                } else {
                    if (has_optional_chain) {
                        optional_chain_test(s, &optional_chaining_label, 1);
                    }
                    emit_op(s, OP_get_field);
                    emit_atom(s, s->token.u.ident.atom);
                }
            }
            if (next_token(s))
                return -1;
        } else if (s->token.val == '[') {
            int prev_op;

        parse_array_access:
            prev_op = get_prev_opcode(fd);
            if (has_optional_chain) {
                optional_chain_test(s, &optional_chaining_label, 1);
            }
            if (next_token(s))
                return -1;
            if (js_parse_expr(s))
                return -1;
            if (js_parse_expect(s, ']'))
                return -1;
            if (prev_op == OP_get_super) {
                emit_op(s, OP_get_super_value);
            } else {
                emit_op(s, OP_get_array_el);
            }
        } else {
            break;
        }
    }
    if (optional_chaining_label >= 0)
        emit_label(s, optional_chaining_label);
    return 0;
}

[[nodiscard]] static int js_parse_delete(JSParseState *s)
{
    JSFunctionDef *fd = s->cur_func;
    JSAtom name;
    int opcode;

    if (next_token(s))
        return -1;
    if (js_parse_unary(s, PF_POW_FORBIDDEN))
        return -1;
    switch(opcode = get_prev_opcode(fd)) {
    case OP_get_field:
        {
            JSValue val;
            int ret;

            name = get_u32(fd->byte_code.buf + fd->last_opcode_pos + 1);
            fd->byte_code.size = fd->last_opcode_pos;
            fd->last_opcode_pos = -1;
            val = JS_AtomToValue(s->ctx, name);
            ret = emit_push_const(s, val, 1);
            JS_FreeValue(s->ctx, val);
            JS_FreeAtom(s->ctx, name);
            if (ret)
                return ret;
        }
        goto do_delete;
    case OP_get_array_el:
        fd->byte_code.size = fd->last_opcode_pos;
        fd->last_opcode_pos = -1;
    do_delete:
        emit_op(s, OP_delete);
        break;
    case OP_scope_get_var:
        /* 'delete this': this is not a reference */
        name = get_u32(fd->byte_code.buf + fd->last_opcode_pos + 1);
        if (name == JS_ATOM_this || name == JS_ATOM_new_target)
            goto ret_true;
        if (fd->js_mode & JS_MODE_STRICT) {
            return js_parse_error(s, "cannot delete a direct reference in strict mode");
        } else {
            fd->byte_code.buf[fd->last_opcode_pos] = OP_scope_delete_var;
        }
        break;
    case OP_scope_get_private_field:
        return js_parse_error(s, "cannot delete a private class field");
    case OP_get_super_value:
        emit_op(s, OP_throw_error);
        emit_atom(s, JS_ATOM_NULL);
        emit_u8(s, JS_THROW_ERROR_DELETE_SUPER);
        break;
    default:
    ret_true:
        emit_op(s, OP_drop);
        emit_op(s, OP_push_true);
        break;
    }
    return 0;
}

/* allowed parse_flags: PF_ARROW_FUNC, PF_POW_ALLOWED, PF_POW_FORBIDDEN */
[[nodiscard]] static int js_parse_unary(JSParseState *s, int parse_flags)
{
    int op;

    switch(s->token.val) {
    case '+':
    case '-':
    case '!':
    case '~':
    case TOK_VOID:
        op = s->token.val;
        if (next_token(s))
            return -1;
        if (js_parse_unary(s, PF_POW_FORBIDDEN))
            return -1;
        switch(op) {
        case '-':
            emit_op(s, OP_neg);
            break;
        case '+':
            emit_op(s, OP_plus);
            break;
        case '!':
            emit_op(s, OP_lnot);
            break;
        case '~':
            emit_op(s, OP_not);
            break;
        case TOK_VOID:
            emit_op(s, OP_drop);
            emit_op(s, OP_undefined);
            break;
        default:
            abort();
        }
        parse_flags = 0;
        break;
    case TOK_DEC:
    case TOK_INC:
        {
            int opcode, op, scope, label;
            JSAtom name;
            op = s->token.val;
            if (next_token(s))
                return -1;
            if (js_parse_unary(s, 0))
                return -1;
            if (get_lvalue(s, &opcode, &scope, &name, &label, NULL, TRUE, op))
                return -1;
            emit_op(s, OP_dec + op - TOK_DEC);
            put_lvalue(s, opcode, scope, name, label, PUT_LVALUE_KEEP_TOP,
                       FALSE);
        }
        break;
    case TOK_TYPEOF:
        {
            JSFunctionDef *fd;
            if (next_token(s))
                return -1;
            if (js_parse_unary(s, PF_POW_FORBIDDEN))
                return -1;
            /* reference access should not return an exception, so we
               patch the get_var */
            fd = s->cur_func;
            if (get_prev_opcode(fd) == OP_scope_get_var) {
                fd->byte_code.buf[fd->last_opcode_pos] = OP_scope_get_var_undef;
            }
            emit_op(s, OP_typeof);
            parse_flags = 0;
        }
        break;
    case TOK_DELETE:
        if (js_parse_delete(s))
            return -1;
        parse_flags = 0;
        break;
    case TOK_AWAIT:
        if (!(s->cur_func->func_kind & JS_FUNC_ASYNC))
            return js_parse_error(s, "unexpected 'await' keyword");
        if (!s->cur_func->in_function_body)
            return js_parse_error(s, "await in default expression");
        if (next_token(s))
            return -1;
        if (js_parse_unary(s, PF_POW_FORBIDDEN))
            return -1;
        emit_op(s, OP_await);
        parse_flags = 0;
        break;
    default:
        if (js_parse_postfix_expr(s, (parse_flags & PF_ARROW_FUNC) |
                                  PF_POSTFIX_CALL))
            return -1;
        if (!s->got_lf &&
            (s->token.val == TOK_DEC || s->token.val == TOK_INC)) {
            int opcode, op, scope, label;
            JSAtom name;
            op = s->token.val;
            if (get_lvalue(s, &opcode, &scope, &name, &label, NULL, TRUE, op))
                return -1;
            emit_op(s, OP_post_dec + op - TOK_DEC);
            put_lvalue(s, opcode, scope, name, label, PUT_LVALUE_KEEP_SECOND,
                       FALSE);
            if (next_token(s))
                return -1;
        }
        break;
    }
    if (parse_flags & (PF_POW_ALLOWED | PF_POW_FORBIDDEN)) {
#ifdef CONFIG_BIGNUM
        if (s->token.val == TOK_POW || s->token.val == TOK_MATH_POW) {
            /* Extended exponentiation syntax rules: we extend the ES7
               grammar in order to have more intuitive semantics:
               -2**2 evaluates to -4. */
            if (!(s->cur_func->js_mode & JS_MODE_MATH)) {
                if (parse_flags & PF_POW_FORBIDDEN) {
                    JS_ThrowSyntaxError(s->ctx, "unparenthesized unary expression can't appear on the left-hand side of '**'");
                    return -1;
                }
            }
            if (next_token(s))
                return -1;
            if (js_parse_unary(s, PF_POW_ALLOWED))
                return -1;
            emit_op(s, OP_pow);
        }
#else
        if (s->token.val == TOK_POW) {
            /* Strict ES7 exponentiation syntax rules: To solve
               conficting semantics between different implementations
               regarding the precedence of prefix operators and the
               postifx exponential, ES7 specifies that -2**2 is a
               syntax error. */
            if (parse_flags & PF_POW_FORBIDDEN) {
                JS_ThrowSyntaxError(s->ctx, "unparenthesized unary expression can't appear on the left-hand side of '**'");
                return -1;
            }
            if (next_token(s))
                return -1;
            if (js_parse_unary(s, PF_POW_ALLOWED))
                return -1;
            emit_op(s, OP_pow);
        }
#endif
    }
    return 0;
}

/* allowed parse_flags: PF_ARROW_FUNC, PF_IN_ACCEPTED */
[[nodiscard]] static int js_parse_expr_binary(JSParseState *s, int level,
                                            int parse_flags)
{
    int op, opcode;

    if (level == 0) {
        return js_parse_unary(s, (parse_flags & PF_ARROW_FUNC) |
                              PF_POW_ALLOWED);
    }
    if (js_parse_expr_binary(s, level - 1, parse_flags))
        return -1;
    for(;;) {
        op = s->token.val;
        switch(level) {
        case 1:
            switch(op) {
            case '*':
                opcode = OP_mul;
                break;
            case '/':
                opcode = OP_div;
                break;
            case '%':
#ifdef CONFIG_BIGNUM
                if (s->cur_func->js_mode & JS_MODE_MATH)
                    opcode = OP_math_mod;
                else
#endif
                    opcode = OP_mod;
                break;
            default:
                return 0;
            }
            break;
        case 2:
            switch(op) {
            case '+':
                opcode = OP_add;
                break;
            case '-':
                opcode = OP_sub;
                break;
            default:
                return 0;
            }
            break;
        case 3:
            switch(op) {
            case TOK_SHL:
                opcode = OP_shl;
                break;
            case TOK_SAR:
                opcode = OP_sar;
                break;
            case TOK_SHR:
                opcode = OP_shr;
                break;
            default:
                return 0;
            }
            break;
        case 4:
            switch(op) {
            case '<':
                opcode = OP_lt;
                break;
            case '>':
                opcode = OP_gt;
                break;
            case TOK_LTE:
                opcode = OP_lte;
                break;
            case TOK_GTE:
                opcode = OP_gte;
                break;
            case TOK_INSTANCEOF:
                opcode = OP_instanceof;
                break;
            case TOK_IN:
                if (parse_flags & PF_IN_ACCEPTED) {
                    opcode = OP_in;
                } else {
                    return 0;
                }
                break;
            default:
                return 0;
            }
            break;
        case 5:
            switch(op) {
            case TOK_EQ:
                opcode = OP_eq;
                break;
            case TOK_NEQ:
                opcode = OP_neq;
                break;
            case TOK_STRICT_EQ:
                opcode = OP_strict_eq;
                break;
            case TOK_STRICT_NEQ:
                opcode = OP_strict_neq;
                break;
            default:
                return 0;
            }
            break;
        case 6:
            switch(op) {
            case '&':
                opcode = OP_and;
                break;
            default:
                return 0;
            }
            break;
        case 7:
            switch(op) {
            case '^':
                opcode = OP_xor;
                break;
            default:
                return 0;
            }
            break;
        case 8:
            switch(op) {
            case '|':
                opcode = OP_or;
                break;
            default:
                return 0;
            }
            break;
        default:
            abort();
        }
        if (next_token(s))
            return -1;
        if (js_parse_expr_binary(s, level - 1, parse_flags & ~PF_ARROW_FUNC))
            return -1;
        emit_op(s, opcode);
    }
    return 0;
}

/* allowed parse_flags: PF_ARROW_FUNC, PF_IN_ACCEPTED */
[[nodiscard]] static int js_parse_logical_and_or(JSParseState *s, int op,
                                               int parse_flags)
{
    int label1;

    if (op == TOK_LAND) {
        if (js_parse_expr_binary(s, 8, parse_flags))
            return -1;
    } else {
        if (js_parse_logical_and_or(s, TOK_LAND, parse_flags))
            return -1;
    }
    if (s->token.val == op) {
        label1 = new_label(s);

        for(;;) {
            if (next_token(s))
                return -1;
            emit_op(s, OP_dup);
            emit_goto(s, op == TOK_LAND ? OP_if_false : OP_if_true, label1);
            emit_op(s, OP_drop);

            if (op == TOK_LAND) {
                if (js_parse_expr_binary(s, 8, parse_flags & ~PF_ARROW_FUNC))
                    return -1;
            } else {
                if (js_parse_logical_and_or(s, TOK_LAND,
                                            parse_flags & ~PF_ARROW_FUNC))
                    return -1;
            }
            if (s->token.val != op) {
                if (s->token.val == TOK_DOUBLE_QUESTION_MARK)
                    return js_parse_error(s, "cannot mix ?? with && or ||");
                break;
            }
        }

        emit_label(s, label1);
    }
    return 0;
}

[[nodiscard]] static int js_parse_coalesce_expr(JSParseState *s, int parse_flags)
{
    int label1;

    if (js_parse_logical_and_or(s, TOK_LOR, parse_flags))
        return -1;
    if (s->token.val == TOK_DOUBLE_QUESTION_MARK) {
        label1 = new_label(s);
        for(;;) {
            if (next_token(s))
                return -1;

            emit_op(s, OP_dup);
            emit_op(s, OP_is_undefined_or_null);
            emit_goto(s, OP_if_false, label1);
            emit_op(s, OP_drop);

            if (js_parse_expr_binary(s, 8, parse_flags & ~PF_ARROW_FUNC))
                return -1;
            if (s->token.val != TOK_DOUBLE_QUESTION_MARK)
                break;
        }
        emit_label(s, label1);
    }
    return 0;
}

/* allowed parse_flags: PF_ARROW_FUNC, PF_IN_ACCEPTED */
[[nodiscard]] static int js_parse_cond_expr(JSParseState *s, int parse_flags)
{
    int label1, label2;

    if (js_parse_coalesce_expr(s, parse_flags))
        return -1;
    if (s->token.val == '?') {
        if (next_token(s))
            return -1;
        label1 = emit_goto(s, OP_if_false, -1);

        if (js_parse_assign_expr(s))
            return -1;
        if (js_parse_expect(s, ':'))
            return -1;

        label2 = emit_goto(s, OP_goto, -1);

        emit_label(s, label1);

        if (js_parse_assign_expr2(s, parse_flags & PF_IN_ACCEPTED))
            return -1;

        emit_label(s, label2);
    }
    return 0;
}

static void emit_return(JSParseState *s, BOOL hasval);

/* allowed parse_flags: PF_IN_ACCEPTED */
[[nodiscard]] static int js_parse_assign_expr2(JSParseState *s, int parse_flags)
{
    int opcode, op, scope;
    JSAtom name0 = JS_ATOM_NULL;
    JSAtom name;

    if (s->token.val == TOK_YIELD) {
        BOOL is_star = FALSE, is_async;

        if (!(s->cur_func->func_kind & JS_FUNC_GENERATOR))
            return js_parse_error(s, "unexpected 'yield' keyword");
        if (!s->cur_func->in_function_body)
            return js_parse_error(s, "yield in default expression");
        if (next_token(s))
            return -1;
        /* XXX: is there a better method to detect 'yield' without
           parameters ? */
        if (s->token.val != ';' && s->token.val != ')' &&
            s->token.val != ']' && s->token.val != '}' &&
            s->token.val != ',' && s->token.val != ':' && !s->got_lf) {
            if (s->token.val == '*') {
                is_star = TRUE;
                if (next_token(s))
                    return -1;
            }
            if (js_parse_assign_expr2(s, parse_flags))
                return -1;
        } else {
            emit_op(s, OP_undefined);
        }
        is_async = (s->cur_func->func_kind == JS_FUNC_ASYNC_GENERATOR);

        if (is_star) {
            int label_loop, label_return, label_next;
            int label_return1, label_yield, label_throw, label_throw1;
            int label_throw2;

            label_loop = new_label(s);
            label_yield = new_label(s);

            emit_op(s, is_async ? OP_for_await_of_start : OP_for_of_start);

            /* remove the catch offset (XXX: could avoid pushing back
               undefined) */
            emit_op(s, OP_drop);
            emit_op(s, OP_undefined);

            emit_op(s, OP_undefined); /* initial value */

            emit_label(s, label_loop);
            emit_op(s, OP_iterator_next);
            if (is_async)
                emit_op(s, OP_await);
            emit_op(s, OP_iterator_check_object);
            emit_op(s, OP_get_field2);
            emit_atom(s, JS_ATOM_done);
            label_next = emit_goto(s, OP_if_true, -1); /* end of loop */
            emit_label(s, label_yield);
            if (is_async) {
                /* OP_async_yield_star takes the value as parameter */
                emit_op(s, OP_get_field);
                emit_atom(s, JS_ATOM_value);
                emit_op(s, OP_await);
                emit_op(s, OP_async_yield_star);
            } else {
                /* OP_yield_star takes (value, done) as parameter */
                emit_op(s, OP_yield_star);
            }
            emit_op(s, OP_dup);
            label_return = emit_goto(s, OP_if_true, -1);
            emit_op(s, OP_drop);
            emit_goto(s, OP_goto, label_loop);

            emit_label(s, label_return);
            emit_op(s, OP_push_i32);
            emit_u32(s, 2);
            emit_op(s, OP_strict_eq);
            label_throw = emit_goto(s, OP_if_true, -1);

            /* return handling */
            if (is_async)
                emit_op(s, OP_await);
            emit_op(s, OP_iterator_call);
            emit_u8(s, 0);
            label_return1 = emit_goto(s, OP_if_true, -1);
            if (is_async)
                emit_op(s, OP_await);
            emit_op(s, OP_iterator_check_object);
            emit_op(s, OP_get_field2);
            emit_atom(s, JS_ATOM_done);
            emit_goto(s, OP_if_false, label_yield);

            emit_op(s, OP_get_field);
            emit_atom(s, JS_ATOM_value);

            emit_label(s, label_return1);
            emit_op(s, OP_nip);
            emit_op(s, OP_nip);
            emit_op(s, OP_nip);
            emit_return(s, TRUE);

            /* throw handling */
            emit_label(s, label_throw);
            emit_op(s, OP_iterator_call);
            emit_u8(s, 1);
            label_throw1 = emit_goto(s, OP_if_true, -1);
            if (is_async)
                emit_op(s, OP_await);
            emit_op(s, OP_iterator_check_object);
            emit_op(s, OP_get_field2);
            emit_atom(s, JS_ATOM_done);
            emit_goto(s, OP_if_false, label_yield);
            emit_goto(s, OP_goto, label_next);
            /* close the iterator and throw a type error exception */
            emit_label(s, label_throw1);
            emit_op(s, OP_iterator_call);
            emit_u8(s, 2);
            label_throw2 = emit_goto(s, OP_if_true, -1);
            if (is_async)
                emit_op(s, OP_await);
            emit_label(s, label_throw2);

            emit_op(s, OP_throw_error);
            emit_atom(s, JS_ATOM_NULL);
            emit_u8(s, JS_THROW_ERROR_ITERATOR_THROW);

            emit_label(s, label_next);
            emit_op(s, OP_get_field);
            emit_atom(s, JS_ATOM_value);
            emit_op(s, OP_nip); /* keep the value associated with
                                   done = true */
            emit_op(s, OP_nip);
            emit_op(s, OP_nip);
        } else {
            int label_next;

            if (is_async)
                emit_op(s, OP_await);
            emit_op(s, OP_yield);
            label_next = emit_goto(s, OP_if_false, -1);
            emit_return(s, TRUE);
            emit_label(s, label_next);
        }
        return 0;
    }
    if (s->token.val == TOK_IDENT) {
        /* name0 is used to check for OP_set_name pattern, not duplicated */
        name0 = s->token.u.ident.atom;
    }
    if (js_parse_cond_expr(s, parse_flags | PF_ARROW_FUNC))
        return -1;

    op = s->token.val;
    if (op == '=' || (op >= TOK_MUL_ASSIGN && op <= TOK_POW_ASSIGN)) {
        int label;
        if (next_token(s))
            return -1;
        if (get_lvalue(s, &opcode, &scope, &name, &label, NULL, (op != '='), op) < 0)
            return -1;

        if (js_parse_assign_expr2(s, parse_flags)) {
            JS_FreeAtom(s->ctx, name);
            return -1;
        }

        if (op == '=') {
            if (opcode == OP_get_ref_value && name == name0) {
                set_object_name(s, name);
            }
        } else {
            static const uint8_t assign_opcodes[] = {
                OP_mul, OP_div, OP_mod, OP_add, OP_sub,
                OP_shl, OP_sar, OP_shr, OP_and, OP_xor, OP_or,
#ifdef CONFIG_BIGNUM
                OP_pow,
#endif
                OP_pow,
            };
            op = assign_opcodes[op - TOK_MUL_ASSIGN];
#ifdef CONFIG_BIGNUM
            if (s->cur_func->js_mode & JS_MODE_MATH) {
                if (op == OP_mod)
                    op = OP_math_mod;
            }
#endif
            emit_op(s, op);
        }
        put_lvalue(s, opcode, scope, name, label, PUT_LVALUE_KEEP_TOP, FALSE);
    } else if (op >= TOK_LAND_ASSIGN && op <= TOK_DOUBLE_QUESTION_MARK_ASSIGN) {
        int label, label1, depth_lvalue, label2;

        if (next_token(s))
            return -1;
        if (get_lvalue(s, &opcode, &scope, &name, &label,
                       &depth_lvalue, TRUE, op) < 0)
            return -1;

        emit_op(s, OP_dup);
        if (op == TOK_DOUBLE_QUESTION_MARK_ASSIGN)
            emit_op(s, OP_is_undefined_or_null);
        label1 = emit_goto(s, op == TOK_LOR_ASSIGN ? OP_if_true : OP_if_false,
                           -1);
        emit_op(s, OP_drop);

        if (js_parse_assign_expr2(s, parse_flags)) {
            JS_FreeAtom(s->ctx, name);
            return -1;
        }

        if (opcode == OP_get_ref_value && name == name0) {
            set_object_name(s, name);
        }

        switch(depth_lvalue) {
        case 1:
            emit_op(s, OP_insert2);
            break;
        case 2:
            emit_op(s, OP_insert3);
            break;
        case 3:
            emit_op(s, OP_insert4);
            break;
        default:
            abort();
        }

        /* XXX: we disable the OP_put_ref_value optimization by not
           using put_lvalue() otherwise depth_lvalue is not correct */
        put_lvalue(s, opcode, scope, name, label, PUT_LVALUE_NOKEEP_DEPTH,
                   FALSE);
        label2 = emit_goto(s, OP_goto, -1);

        emit_label(s, label1);

        /* remove the lvalue stack entries */
        while (depth_lvalue != 0) {
            emit_op(s, OP_nip);
            depth_lvalue--;
        }

        emit_label(s, label2);
    }
    return 0;
}

[[nodiscard]] static int js_parse_assign_expr(JSParseState *s)
{
    return js_parse_assign_expr2(s, PF_IN_ACCEPTED);
}

/* allowed parse_flags: PF_IN_ACCEPTED */
[[nodiscard]] static int js_parse_expr2(JSParseState *s, int parse_flags)
{
    BOOL comma = FALSE;
    for(;;) {
        if (js_parse_assign_expr2(s, parse_flags))
            return -1;
        if (comma) {
            /* prevent get_lvalue from using the last expression
               as an lvalue. This also prevents the conversion of
               of get_var to get_ref for method lookup in function
               call inside `with` statement.
             */
            s->cur_func->last_opcode_pos = -1;
        }
        if (s->token.val != ',')
            break;
        comma = TRUE;
        if (next_token(s))
            return -1;
        emit_op(s, OP_drop);
    }
    return 0;
}

[[nodiscard]] static int js_parse_expr(JSParseState *s)
{
    return js_parse_expr2(s, PF_IN_ACCEPTED);
}

static void push_break_entry(JSFunctionDef *fd, BlockEnv *be,
                             JSAtom label_name,
                             int label_break, int label_cont,
                             int drop_count)
{
    be->prev = fd->top_break;
    fd->top_break = be;
    be->label_name = label_name;
    be->label_break = label_break;
    be->label_cont = label_cont;
    be->drop_count = drop_count;
    be->label_finally = -1;
    be->scope_level = fd->scope_level;
    be->has_iterator = FALSE;
}

static void pop_break_entry(JSFunctionDef *fd)
{
    BlockEnv *be;
    be = fd->top_break;
    fd->top_break = be->prev;
}

[[nodiscard]] static int emit_break(JSParseState *s, JSAtom name, int is_cont)
{
    BlockEnv *top;
    int i, scope_level;

    scope_level = s->cur_func->scope_level;
    top = s->cur_func->top_break;
    while (top != NULL) {
        close_scopes(s, scope_level, top->scope_level);
        scope_level = top->scope_level;
        if (is_cont &&
            top->label_cont != -1 &&
            (name == JS_ATOM_NULL || top->label_name == name)) {
            /* continue stays inside the same block */
            emit_goto(s, OP_goto, top->label_cont);
            return 0;
        }
        if (!is_cont &&
            top->label_break != -1 &&
            (name == JS_ATOM_NULL || top->label_name == name)) {
            emit_goto(s, OP_goto, top->label_break);
            return 0;
        }
        i = 0;
        if (top->has_iterator) {
            emit_op(s, OP_iterator_close);
            i += 3;
        }
        for(; i < top->drop_count; i++)
            emit_op(s, OP_drop);
        if (top->label_finally != -1) {
            /* must push dummy value to keep same stack depth */
            emit_op(s, OP_undefined);
            emit_goto(s, OP_gosub, top->label_finally);
            emit_op(s, OP_drop);
        }
        top = top->prev;
    }
    if (name == JS_ATOM_NULL) {
        if (is_cont)
            return js_parse_error(s, "continue must be inside loop");
        else
            return js_parse_error(s, "break must be inside loop or switch");
    } else {
        return js_parse_error(s, "break/continue label not found");
    }
}

/* execute the finally blocks before return */
static void emit_return(JSParseState *s, BOOL hasval)
{
    BlockEnv *top;
    int drop_count;

    drop_count = 0;
    top = s->cur_func->top_break;
    while (top != NULL) {
        /* XXX: emit the appropriate OP_leave_scope opcodes? Probably not
           required as all local variables will be closed upon returning
           from JS_CallInternal, but not in the same order. */
        if (top->has_iterator) {
            /* with 'yield', the exact number of OP_drop to emit is
               unknown, so we use a specific operation to look for
               the catch offset */
            if (!hasval) {
                emit_op(s, OP_undefined);
                hasval = TRUE;
            }
            emit_op(s, OP_iterator_close_return);
            if (s->cur_func->func_kind == JS_FUNC_ASYNC_GENERATOR) {
                int label_next, label_next2;

                emit_op(s, OP_drop); /* catch offset */
                emit_op(s, OP_drop); /* next */
                emit_op(s, OP_get_field2);
                emit_atom(s, JS_ATOM_return);
                /* stack: iter_obj return_func */
                emit_op(s, OP_dup);
                emit_op(s, OP_is_undefined_or_null);
                label_next = emit_goto(s, OP_if_true, -1);
                emit_op(s, OP_call_method);
                emit_u16(s, 0);
                emit_op(s, OP_iterator_check_object);
                emit_op(s, OP_await);
                label_next2 = emit_goto(s, OP_goto, -1);
                emit_label(s, label_next);
                emit_op(s, OP_drop);
                emit_label(s, label_next2);
                emit_op(s, OP_drop);
            } else {
                emit_op(s, OP_iterator_close);
            }
            drop_count = -3;
        }
        drop_count += top->drop_count;
        if (top->label_finally != -1) {
            while(drop_count) {
                /* must keep the stack top if hasval */
                emit_op(s, hasval ? OP_nip : OP_drop);
                drop_count--;
            }
            if (!hasval) {
                /* must push return value to keep same stack size */
                emit_op(s, OP_undefined);
                hasval = TRUE;
            }
            emit_goto(s, OP_gosub, top->label_finally);
        }
        top = top->prev;
    }
    if (s->cur_func->is_derived_class_constructor) {
        int label_return;

        /* 'this' can be uninitialized, so it may be accessed only if
           the derived class constructor does not return an object */
        if (hasval) {
            emit_op(s, OP_check_ctor_return);
            label_return = emit_goto(s, OP_if_false, -1);
            emit_op(s, OP_drop);
        } else {
            label_return = -1;
        }

        /* XXX: if this is not initialized, should throw the
           ReferenceError in the caller realm */
        emit_op(s, OP_scope_get_var);
        emit_atom(s, JS_ATOM_this);
        emit_u16(s, 0);

        emit_label(s, label_return);
        emit_op(s, OP_return);
    } else if (s->cur_func->func_kind != JS_FUNC_NORMAL) {
        if (!hasval) {
            emit_op(s, OP_undefined);
        } else if (s->cur_func->func_kind == JS_FUNC_ASYNC_GENERATOR) {
            emit_op(s, OP_await);
        }
        emit_op(s, OP_return_async);
    } else {
        emit_op(s, hasval ? OP_return : OP_return_undef);
    }
}

#define DECL_MASK_FUNC  (1 << 0) /* allow normal function declaration */
/* ored with DECL_MASK_FUNC if function declarations are allowed with a label */
#define DECL_MASK_FUNC_WITH_LABEL (1 << 1)
#define DECL_MASK_OTHER (1 << 2) /* all other declarations */
#define DECL_MASK_ALL   (DECL_MASK_FUNC | DECL_MASK_FUNC_WITH_LABEL | DECL_MASK_OTHER)

[[nodiscard]] static int js_parse_statement_or_decl(JSParseState *s,
                                                  int decl_mask);

[[nodiscard]] static int js_parse_statement(JSParseState *s)
{
    return js_parse_statement_or_decl(s, 0);
}

[[nodiscard]] static int js_parse_block(JSParseState *s)
{
    if (js_parse_expect(s, '{'))
        return -1;
    if (s->token.val != '}') {
        push_scope(s);
        for(;;) {
            if (js_parse_statement_or_decl(s, DECL_MASK_ALL))
                return -1;
            if (s->token.val == '}')
                break;
        }
        pop_scope(s);
    }
    if (next_token(s))
        return -1;
    return 0;
}

/* allowed parse_flags: PF_IN_ACCEPTED */
[[nodiscard]] static int js_parse_var(JSParseState *s, int parse_flags, int tok,
                                    BOOL export_flag)
{
    JSContext *ctx = s->ctx;
    JSFunctionDef *fd = s->cur_func;
    JSAtom name = JS_ATOM_NULL;

    for (;;) {
        if (s->token.val == TOK_IDENT) {
            if (s->token.u.ident.is_reserved) {
                return js_parse_error_reserved_identifier(s);
            }
            name = JS_DupAtom(ctx, s->token.u.ident.atom);
            if (name == JS_ATOM_let && (tok == TOK_LET || tok == TOK_CONST)) {
                js_parse_error(s, "'let' is not a valid lexical identifier");
                goto var_error;
            }
            if (next_token(s))
                goto var_error;
            if (js_define_var(s, name, tok))
                goto var_error;
            if (export_flag) {
                if (!add_export_entry(s, s->cur_func->module, name, name,
                                      JS_EXPORT_TYPE_LOCAL))
                    goto var_error;
            }

            if (s->token.val == '=') {
                if (next_token(s))
                    goto var_error;
                if (tok == TOK_VAR) {
                    /* Must make a reference for proper `with` semantics */
                    int opcode, scope, label;
                    JSAtom name1;

                    emit_op(s, OP_scope_get_var);
                    emit_atom(s, name);
                    emit_u16(s, fd->scope_level);
                    if (get_lvalue(s, &opcode, &scope, &name1, &label, NULL, FALSE, '=') < 0)
                        goto var_error;
                    if (js_parse_assign_expr2(s, parse_flags)) {
                        JS_FreeAtom(ctx, name1);
                        goto var_error;
                    }
                    set_object_name(s, name);
                    put_lvalue(s, opcode, scope, name1, label,
                               PUT_LVALUE_NOKEEP, FALSE);
                } else {
                    if (js_parse_assign_expr2(s, parse_flags))
                        goto var_error;
                    set_object_name(s, name);
                    emit_op(s, (tok == TOK_CONST || tok == TOK_LET) ?
                        OP_scope_put_var_init : OP_scope_put_var);
                    emit_atom(s, name);
                    emit_u16(s, fd->scope_level);
                }
            } else {
                if (tok == TOK_CONST) {
                    js_parse_error(s, "missing initializer for const variable");
                    goto var_error;
                }
                if (tok == TOK_LET) {
                    /* initialize lexical variable upon entering its scope */
                    emit_op(s, OP_undefined);
                    emit_op(s, OP_scope_put_var_init);
                    emit_atom(s, name);
                    emit_u16(s, fd->scope_level);
                }
            }
            JS_FreeAtom(ctx, name);
        } else {
            int skip_bits;
            if ((s->token.val == '[' || s->token.val == '{')
            &&  js_parse_skip_parens_token(s, &skip_bits, FALSE) == '=') {
                emit_op(s, OP_undefined);
                if (js_parse_destructuring_element(s, tok, 0, TRUE, skip_bits & SKIP_HAS_ELLIPSIS, TRUE) < 0)
                    return -1;
            } else {
                return js_parse_error(s, "variable name expected");
            }
        }
        if (s->token.val != ',')
            break;
        if (next_token(s))
            return -1;
    }
    return 0;

 var_error:
    JS_FreeAtom(ctx, name);
    return -1;
}

/* test if the current token is a label. Use simplistic look-ahead scanner */
static BOOL is_label(JSParseState *s)
{
    return (s->token.val == TOK_IDENT && !s->token.u.ident.is_reserved &&
            peek_token(s, FALSE) == ':');
}

/* test if the current token is a let keyword. Use simplistic look-ahead scanner */
static int is_let(JSParseState *s, int decl_mask)
{
    int res = FALSE;

    if (token_is_pseudo_keyword(s, JS_ATOM_let)) {
#if 1
        JSParsePos pos;
        js_parse_get_pos(s, &pos);
        for (;;) {
            if (next_token(s)) {
                res = -1;
                break;
            }
            if (s->token.val == '[') {
                /* let [ is a syntax restriction:
                   it never introduces an ExpressionStatement */
                res = TRUE;
                break;
            }
            if (s->token.val == '{' ||
                (s->token.val == TOK_IDENT && !s->token.u.ident.is_reserved) ||
                s->token.val == TOK_LET ||
                s->token.val == TOK_YIELD ||
                s->token.val == TOK_AWAIT) {
                /* Check for possible ASI if not scanning for Declaration */
                /* XXX: should also check that `{` introduces a BindingPattern,
                   but Firefox does not and rejects eval("let=1;let\n{if(1)2;}") */
                if (s->last_line_num == s->token.line_num || (decl_mask & DECL_MASK_OTHER)) {
                    res = TRUE;
                    break;
                }
                break;
            }
            break;
        }
        if (js_parse_seek_token(s, &pos)) {
            res = -1;
        }
#else
        int tok = peek_token(s, TRUE);
        if (tok == '{' || tok == TOK_IDENT || peek_token(s, FALSE) == '[') {
            res = TRUE;
        }
#endif
    }
    return res;
}

/* XXX: handle IteratorClose when exiting the loop before the
   enumeration is done */
[[nodiscard]] static int js_parse_for_in_of(JSParseState *s, int label_name,
                                          BOOL is_async)
{
    JSContext *ctx = s->ctx;
    JSFunctionDef *fd = s->cur_func;
    JSAtom var_name;
    BOOL has_initializer, is_for_of, has_destructuring;
    int tok, tok1, opcode, scope, block_scope_level;
    int label_next, label_expr, label_cont, label_body, label_break;
    int pos_next, pos_expr;
    BlockEnv break_entry;

    has_initializer = FALSE;
    has_destructuring = FALSE;
    is_for_of = FALSE;
    block_scope_level = fd->scope_level;
    label_cont = new_label(s);
    label_body = new_label(s);
    label_break = new_label(s);
    label_next = new_label(s);

    /* create scope for the lexical variables declared in the enumeration
       expressions. XXX: Not completely correct because of weird capturing
       semantics in `for (i of o) a.push(function(){return i})` */
    push_scope(s);

    /* local for_in scope starts here so individual elements
       can be closed in statement. */
    push_break_entry(s->cur_func, &break_entry,
                     label_name, label_break, label_cont, 1);
    break_entry.scope_level = block_scope_level;

    label_expr = emit_goto(s, OP_goto, -1);

    pos_next = s->cur_func->byte_code.size;
    emit_label(s, label_next);

    tok = s->token.val;
    switch (is_let(s, DECL_MASK_OTHER)) {
    case TRUE:
        tok = TOK_LET;
        break;
    case FALSE:
        break;
    default:
        return -1;
    }
    if (tok == TOK_VAR || tok == TOK_LET || tok == TOK_CONST) {
        if (next_token(s))
            return -1;

        if (!(s->token.val == TOK_IDENT && !s->token.u.ident.is_reserved)) {
            if (s->token.val == '[' || s->token.val == '{') {
                if (js_parse_destructuring_element(s, tok, 0, TRUE, -1, FALSE) < 0)
                    return -1;
                has_destructuring = TRUE;
            } else {
                return js_parse_error(s, "variable name expected");
            }
            var_name = JS_ATOM_NULL;
        } else {
            var_name = JS_DupAtom(ctx, s->token.u.ident.atom);
            if (next_token(s)) {
                JS_FreeAtom(s->ctx, var_name);
                return -1;
            }
            if (js_define_var(s, var_name, tok)) {
                JS_FreeAtom(s->ctx, var_name);
                return -1;
            }
            emit_op(s, (tok == TOK_CONST || tok == TOK_LET) ?
                    OP_scope_put_var_init : OP_scope_put_var);
            emit_atom(s, var_name);
            emit_u16(s, fd->scope_level);
        }
    } else {
        int skip_bits;
        if ((s->token.val == '[' || s->token.val == '{')
        &&  ((tok1 = js_parse_skip_parens_token(s, &skip_bits, FALSE)) == TOK_IN || tok1 == TOK_OF)) {
            if (js_parse_destructuring_element(s, 0, 0, TRUE, skip_bits & SKIP_HAS_ELLIPSIS, TRUE) < 0)
                return -1;
        } else {
            int lvalue_label;
            if (js_parse_left_hand_side_expr(s))
                return -1;
            if (get_lvalue(s, &opcode, &scope, &var_name, &lvalue_label,
                           NULL, FALSE, TOK_FOR))
                return -1;
            put_lvalue(s, opcode, scope, var_name, lvalue_label,
                       PUT_LVALUE_NOKEEP_BOTTOM, FALSE);
        }
        var_name = JS_ATOM_NULL;
    }
    emit_goto(s, OP_goto, label_body);

    pos_expr = s->cur_func->byte_code.size;
    emit_label(s, label_expr);
    if (s->token.val == '=') {
        /* XXX: potential scoping issue if inside `with` statement */
        has_initializer = TRUE;
        /* parse and evaluate initializer prior to evaluating the
           object (only used with "for in" with a non lexical variable
           in non strict mode */
        if (next_token(s) || js_parse_assign_expr2(s, 0)) {
            JS_FreeAtom(ctx, var_name);
            return -1;
        }
        if (var_name != JS_ATOM_NULL) {
            emit_op(s, OP_scope_put_var);
            emit_atom(s, var_name);
            emit_u16(s, fd->scope_level);
        }
    }
    JS_FreeAtom(ctx, var_name);

    if (token_is_pseudo_keyword(s, JS_ATOM_of)) {
        break_entry.has_iterator = is_for_of = TRUE;
        break_entry.drop_count += 2;
        if (has_initializer)
            goto initializer_error;
    } else if (s->token.val == TOK_IN) {
        if (is_async)
            return js_parse_error(s, "'for await' loop should be used with 'of'");
        if (has_initializer &&
            (tok != TOK_VAR || (fd->js_mode & JS_MODE_STRICT) ||
             has_destructuring)) {
        initializer_error:
            return js_parse_error(s, "a declaration in the head of a for-%s loop can't have an initializer",
                                  is_for_of ? "of" : "in");
        }
    } else {
        return js_parse_error(s, "expected 'of' or 'in' in for control expression");
    }
    if (next_token(s))
        return -1;
    if (is_for_of) {
        if (js_parse_assign_expr(s))
            return -1;
    } else {
        if (js_parse_expr(s))
            return -1;
    }
    /* close the scope after having evaluated the expression so that
       the TDZ values are in the closures */
    close_scopes(s, s->cur_func->scope_level, block_scope_level);
    if (is_for_of) {
        if (is_async)
            emit_op(s, OP_for_await_of_start);
        else
            emit_op(s, OP_for_of_start);
        /* on stack: enum_rec */
    } else {
        emit_op(s, OP_for_in_start);
        /* on stack: enum_obj */
    }
    emit_goto(s, OP_goto, label_cont);

    if (js_parse_expect(s, ')'))
        return -1;

    if (OPTIMIZE) {
        /* move the `next` code here */
        DynBuf *bc = &s->cur_func->byte_code;
        int chunk_size = pos_expr - pos_next;
        int offset = bc->size - pos_next;
        int i;
        dbuf_realloc(bc, bc->size + chunk_size);
        dbuf_put(bc, bc->buf + pos_next, chunk_size);
        memset(bc->buf + pos_next, OP_nop, chunk_size);
        /* `next` part ends with a goto */
        s->cur_func->last_opcode_pos = bc->size - 5;
        /* relocate labels */
        for (i = label_cont; i < s->cur_func->label_count; i++) {
            LabelSlot *ls = &s->cur_func->label_slots[i];
            if (ls->pos >= pos_next && ls->pos < pos_expr)
                ls->pos += offset;
        }
    }

    emit_label(s, label_body);
    if (js_parse_statement(s))
        return -1;

    close_scopes(s, s->cur_func->scope_level, block_scope_level);

    emit_label(s, label_cont);
    if (is_for_of) {
        if (is_async) {
            /* call the next method */
            /* stack: iter_obj next catch_offset */
            emit_op(s, OP_dup3);
            emit_op(s, OP_drop);
            emit_op(s, OP_call_method);
            emit_u16(s, 0);
            /* get the result of the promise */
            emit_op(s, OP_await);
            /* unwrap the value and done values */
            emit_op(s, OP_iterator_get_value_done);
        } else {
            emit_op(s, OP_for_of_next);
            emit_u8(s, 0);
        }
    } else {
        emit_op(s, OP_for_in_next);
    }
    /* on stack: enum_rec / enum_obj value bool */
    emit_goto(s, OP_if_false, label_next);
    /* drop the undefined value from for_xx_next */
    emit_op(s, OP_drop);

    emit_label(s, label_break);
    if (is_for_of) {
        /* close and drop enum_rec */
        emit_op(s, OP_iterator_close);
    } else {
        emit_op(s, OP_drop);
    }
    pop_break_entry(s->cur_func);
    pop_scope(s);
    return 0;
}

static void set_eval_ret_undefined(JSParseState *s)
{
    if (s->cur_func->eval_ret_idx >= 0) {
        emit_op(s, OP_undefined);
        emit_op(s, OP_put_loc);
        emit_u16(s, s->cur_func->eval_ret_idx);
    }
}

[[nodiscard]] static int js_parse_statement_or_decl(JSParseState *s,
                                                  int decl_mask)
{
    JSContext *ctx = s->ctx;
    JSAtom label_name;
    int tok;

    /* specific label handling */
    /* XXX: support multiple labels on loop statements */
    label_name = JS_ATOM_NULL;
    if (is_label(s)) {
        BlockEnv *be;

        label_name = JS_DupAtom(ctx, s->token.u.ident.atom);

        for (be = s->cur_func->top_break; be; be = be->prev) {
            if (be->label_name == label_name) {
                js_parse_error(s, "duplicate label name");
                goto fail;
            }
        }

        if (next_token(s))
            goto fail;
        if (js_parse_expect(s, ':'))
            goto fail;
        if (s->token.val != TOK_FOR
        &&  s->token.val != TOK_DO
        &&  s->token.val != TOK_WHILE) {
            /* labelled regular statement */
            int label_break, mask;
            BlockEnv break_entry;

            label_break = new_label(s);
            push_break_entry(s->cur_func, &break_entry,
                             label_name, label_break, -1, 0);
            if (!(s->cur_func->js_mode & JS_MODE_STRICT) &&
                (decl_mask & DECL_MASK_FUNC_WITH_LABEL)) {
                mask = DECL_MASK_FUNC | DECL_MASK_FUNC_WITH_LABEL;
            } else {
                mask = 0;
            }
            if (js_parse_statement_or_decl(s, mask))
                goto fail;
            emit_label(s, label_break);
            pop_break_entry(s->cur_func);
            goto done;
        }
    }

    switch(tok = s->token.val) {
    case '{':
        if (js_parse_block(s))
            goto fail;
        break;
    case TOK_RETURN:
        if (s->cur_func->is_eval) {
            js_parse_error(s, "return not in a function");
            goto fail;
        }
        if (next_token(s))
            goto fail;
        if (s->token.val != ';' && s->token.val != '}' && !s->got_lf) {
            if (js_parse_expr(s))
                goto fail;
            emit_return(s, TRUE);
        } else {
            emit_return(s, FALSE);
        }
        if (js_parse_expect_semi(s))
            goto fail;
        break;
    case TOK_THROW:
        if (next_token(s))
            goto fail;
        if (s->got_lf) {
            js_parse_error(s, "line terminator not allowed after throw");
            goto fail;
        }
        if (js_parse_expr(s))
            goto fail;
        emit_op(s, OP_throw);
        if (js_parse_expect_semi(s))
            goto fail;
        break;
    case TOK_LET:
    case TOK_CONST:
    haslet:
        if (!(decl_mask & DECL_MASK_OTHER)) {
            js_parse_error(s, "lexical declarations can't appear in single-statement context");
            goto fail;
        }
        /* fall thru */
    case TOK_VAR:
        if (next_token(s))
            goto fail;
        if (js_parse_var(s, TRUE, tok, FALSE))
            goto fail;
        if (js_parse_expect_semi(s))
            goto fail;
        break;
    case TOK_IF:
        {
            int label1, label2, mask;
            if (next_token(s))
                goto fail;
            /* create a new scope for `let f;if(1) function f(){}` */
            push_scope(s);
            set_eval_ret_undefined(s);
            if (js_parse_expr_paren(s))
                goto fail;
            label1 = emit_goto(s, OP_if_false, -1);
            if (s->cur_func->js_mode & JS_MODE_STRICT)
                mask = 0;
            else
                mask = DECL_MASK_FUNC; /* Annex B.3.4 */

            if (js_parse_statement_or_decl(s, mask))
                goto fail;

            if (s->token.val == TOK_ELSE) {
                label2 = emit_goto(s, OP_goto, -1);
                if (next_token(s))
                    goto fail;

                emit_label(s, label1);
                if (js_parse_statement_or_decl(s, mask))
                    goto fail;

                label1 = label2;
            }
            emit_label(s, label1);
            pop_scope(s);
        }
        break;
    case TOK_WHILE:
        {
            int label_cont, label_break;
            BlockEnv break_entry;

            label_cont = new_label(s);
            label_break = new_label(s);

            push_break_entry(s->cur_func, &break_entry,
                             label_name, label_break, label_cont, 0);

            if (next_token(s))
                goto fail;

            set_eval_ret_undefined(s);

            emit_label(s, label_cont);
            if (js_parse_expr_paren(s))
                goto fail;
            emit_goto(s, OP_if_false, label_break);

            if (js_parse_statement(s))
                goto fail;
            emit_goto(s, OP_goto, label_cont);

            emit_label(s, label_break);

            pop_break_entry(s->cur_func);
        }
        break;
    case TOK_DO:
        {
            int label_cont, label_break, label1;
            BlockEnv break_entry;

            label_cont = new_label(s);
            label_break = new_label(s);
            label1 = new_label(s);

            push_break_entry(s->cur_func, &break_entry,
                             label_name, label_break, label_cont, 0);

            if (next_token(s))
                goto fail;

            emit_label(s, label1);

            set_eval_ret_undefined(s);

            if (js_parse_statement(s))
                goto fail;

            emit_label(s, label_cont);
            if (js_parse_expect(s, TOK_WHILE))
                goto fail;
            if (js_parse_expr_paren(s))
                goto fail;
            /* Insert semicolon if missing */
            if (s->token.val == ';') {
                if (next_token(s))
                    goto fail;
            }
            emit_goto(s, OP_if_true, label1);

            emit_label(s, label_break);

            pop_break_entry(s->cur_func);
        }
        break;
    case TOK_FOR:
        {
            int label_cont, label_break, label_body, label_test;
            int pos_cont, pos_body, block_scope_level;
            BlockEnv break_entry;
            int tok, bits;
            BOOL is_async;

            if (next_token(s))
                goto fail;

            set_eval_ret_undefined(s);
            bits = 0;
            is_async = FALSE;
            if (s->token.val == '(') {
                js_parse_skip_parens_token(s, &bits, FALSE);
            } else if (s->token.val == TOK_AWAIT) {
                if (!(s->cur_func->func_kind & JS_FUNC_ASYNC)) {
                    js_parse_error(s, "for await is only valid in asynchronous functions");
                    goto fail;
                }
                is_async = TRUE;
                if (next_token(s))
                    goto fail;
            }
            if (js_parse_expect(s, '('))
                goto fail;

            if (!(bits & SKIP_HAS_SEMI)) {
                /* parse for/in or for/of */
                if (js_parse_for_in_of(s, label_name, is_async))
                    goto fail;
                break;
            }
            block_scope_level = s->cur_func->scope_level;

            /* create scope for the lexical variables declared in the initial,
               test and increment expressions */
            push_scope(s);
            /* initial expression */
            tok = s->token.val;
            if (tok != ';') {
                switch (is_let(s, DECL_MASK_OTHER)) {
                case TRUE:
                    tok = TOK_LET;
                    break;
                case FALSE:
                    break;
                default:
                    goto fail;
                }
                if (tok == TOK_VAR || tok == TOK_LET || tok == TOK_CONST) {
                    if (next_token(s))
                        goto fail;
                    if (js_parse_var(s, FALSE, tok, FALSE))
                        goto fail;
                } else {
                    if (js_parse_expr2(s, FALSE))
                        goto fail;
                    emit_op(s, OP_drop);
                }

                /* close the closures before the first iteration */
                close_scopes(s, s->cur_func->scope_level, block_scope_level);
            }
            if (js_parse_expect(s, ';'))
                goto fail;

            label_test = new_label(s);
            label_cont = new_label(s);
            label_body = new_label(s);
            label_break = new_label(s);

            push_break_entry(s->cur_func, &break_entry,
                             label_name, label_break, label_cont, 0);

            /* test expression */
            if (s->token.val == ';') {
                /* no test expression */
                label_test = label_body;
            } else {
                emit_label(s, label_test);
                if (js_parse_expr(s))
                    goto fail;
                emit_goto(s, OP_if_false, label_break);
            }
            if (js_parse_expect(s, ';'))
                goto fail;

            if (s->token.val == ')') {
                /* no end expression */
                break_entry.label_cont = label_cont = label_test;
                pos_cont = 0; /* avoid warning */
            } else {
                /* skip the end expression */
                emit_goto(s, OP_goto, label_body);

                pos_cont = s->cur_func->byte_code.size;
                emit_label(s, label_cont);
                if (js_parse_expr(s))
                    goto fail;
                emit_op(s, OP_drop);
                if (label_test != label_body)
                    emit_goto(s, OP_goto, label_test);
            }
            if (js_parse_expect(s, ')'))
                goto fail;

            pos_body = s->cur_func->byte_code.size;
            emit_label(s, label_body);
            if (js_parse_statement(s))
                goto fail;

            /* close the closures before the next iteration */
            /* XXX: check continue case */
            close_scopes(s, s->cur_func->scope_level, block_scope_level);

            if (OPTIMIZE && label_test != label_body && label_cont != label_test) {
                /* move the increment code here */
                DynBuf *bc = &s->cur_func->byte_code;
                int chunk_size = pos_body - pos_cont;
                int offset = bc->size - pos_cont;
                int i;
                dbuf_realloc(bc, bc->size + chunk_size);
                dbuf_put(bc, bc->buf + pos_cont, chunk_size);
                memset(bc->buf + pos_cont, OP_nop, chunk_size);
                /* increment part ends with a goto */
                s->cur_func->last_opcode_pos = bc->size - 5;
                /* relocate labels */
                for (i = label_cont; i < s->cur_func->label_count; i++) {
                    LabelSlot *ls = &s->cur_func->label_slots[i];
                    if (ls->pos >= pos_cont && ls->pos < pos_body)
                        ls->pos += offset;
                }
            } else {
                emit_goto(s, OP_goto, label_cont);
            }

            emit_label(s, label_break);

            pop_break_entry(s->cur_func);
            pop_scope(s);
        }
        break;
    case TOK_BREAK:
    case TOK_CONTINUE:
        {
            int is_cont = s->token.val - TOK_BREAK;
            int label;

            if (next_token(s))
                goto fail;
            if (!s->got_lf && s->token.val == TOK_IDENT && !s->token.u.ident.is_reserved)
                label = s->token.u.ident.atom;
            else
                label = JS_ATOM_NULL;
            if (emit_break(s, label, is_cont))
                goto fail;
            if (label != JS_ATOM_NULL) {
                if (next_token(s))
                    goto fail;
            }
            if (js_parse_expect_semi(s))
                goto fail;
        }
        break;
    case TOK_SWITCH:
        {
            int label_case, label_break, label1;
            int default_label_pos;
            BlockEnv break_entry;

            if (next_token(s))
                goto fail;

            set_eval_ret_undefined(s);
            if (js_parse_expr_paren(s))
                goto fail;

            push_scope(s);
            label_break = new_label(s);
            push_break_entry(s->cur_func, &break_entry,
                             label_name, label_break, -1, 1);

            if (js_parse_expect(s, '{'))
                goto fail;

            default_label_pos = -1;
            label_case = -1;
            while (s->token.val != '}') {
                if (s->token.val == TOK_CASE) {
                    label1 = -1;
                    if (label_case >= 0) {
                        /* skip the case if needed */
                        label1 = emit_goto(s, OP_goto, -1);
                    }
                    emit_label(s, label_case);
                    label_case = -1;
                    for (;;) {
                        /* parse a sequence of case clauses */
                        if (next_token(s))
                            goto fail;
                        emit_op(s, OP_dup);
                        if (js_parse_expr(s))
                            goto fail;
                        if (js_parse_expect(s, ':'))
                            goto fail;
                        emit_op(s, OP_strict_eq);
                        if (s->token.val == TOK_CASE) {
                            label1 = emit_goto(s, OP_if_true, label1);
                        } else {
                            label_case = emit_goto(s, OP_if_false, -1);
                            emit_label(s, label1);
                            break;
                        }
                    }
                } else if (s->token.val == TOK_DEFAULT) {
                    if (next_token(s))
                        goto fail;
                    if (js_parse_expect(s, ':'))
                        goto fail;
                    if (default_label_pos >= 0) {
                        js_parse_error(s, "duplicate default");
                        goto fail;
                    }
                    if (label_case < 0) {
                        /* falling thru direct from switch expression */
                        label_case = emit_goto(s, OP_goto, -1);
                    }
                    /* Emit a dummy label opcode. Label will be patched after
                       the end of the switch body. Do not use emit_label(s, 0)
                       because it would clobber label 0 address, preventing
                       proper optimizer operation.
                     */
                    emit_op(s, OP_label);
                    emit_u32(s, 0);
                    default_label_pos = s->cur_func->byte_code.size - 4;
                } else {
                    if (label_case < 0) {
                        /* falling thru direct from switch expression */
                        js_parse_error(s, "invalid switch statement");
                        goto fail;
                    }
                    if (js_parse_statement_or_decl(s, DECL_MASK_ALL))
                        goto fail;
                }
            }
            if (js_parse_expect(s, '}'))
                goto fail;
            if (default_label_pos >= 0) {
                /* Ugly patch for the the `default` label, shameful and risky */
                put_u32(s->cur_func->byte_code.buf + default_label_pos,
                        label_case);
                s->cur_func->label_slots[label_case].pos = default_label_pos + 4;
            } else {
                emit_label(s, label_case);
            }
            emit_label(s, label_break);
            emit_op(s, OP_drop); /* drop the switch expression */

            pop_break_entry(s->cur_func);
            pop_scope(s);
        }
        break;
    case TOK_TRY:
        {
            int label_catch, label_catch2, label_finally, label_end;
            JSAtom name;
            BlockEnv block_env;

            set_eval_ret_undefined(s);
            if (next_token(s))
                goto fail;
            label_catch = new_label(s);
            label_catch2 = new_label(s);
            label_finally = new_label(s);
            label_end = new_label(s);

            emit_goto(s, OP_catch, label_catch);

            push_break_entry(s->cur_func, &block_env,
                             JS_ATOM_NULL, -1, -1, 1);
            block_env.label_finally = label_finally;

            if (js_parse_block(s))
                goto fail;

            pop_break_entry(s->cur_func);

            if (js_is_live_code(s)) {
                /* drop the catch offset */
                emit_op(s, OP_drop);
                /* must push dummy value to keep same stack size */
                emit_op(s, OP_undefined);
                emit_goto(s, OP_gosub, label_finally);
                emit_op(s, OP_drop);

                emit_goto(s, OP_goto, label_end);
            }

            if (s->token.val == TOK_CATCH) {
                if (next_token(s))
                    goto fail;

                push_scope(s);  /* catch variable */
                emit_label(s, label_catch);

                if (s->token.val == '{') {
                    /* support optional-catch-binding feature */
                    emit_op(s, OP_drop);    /* pop the exception object */
                } else {
                    if (js_parse_expect(s, '('))
                        goto fail;
                    if (!(s->token.val == TOK_IDENT && !s->token.u.ident.is_reserved)) {
                        if (s->token.val == '[' || s->token.val == '{') {
                            /* XXX: TOK_LET is not completely correct */
                            if (js_parse_destructuring_element(s, TOK_LET, 0, TRUE, -1, TRUE) < 0)
                                goto fail;
                        } else {
                            js_parse_error(s, "identifier expected");
                            goto fail;
                        }
                    } else {
                        name = JS_DupAtom(ctx, s->token.u.ident.atom);
                        if (next_token(s)
                        ||  js_define_var(s, name, TOK_CATCH) < 0) {
                            JS_FreeAtom(ctx, name);
                            goto fail;
                        }
                        /* store the exception value in the catch variable */
                        emit_op(s, OP_scope_put_var);
                        emit_u32(s, name);
                        emit_u16(s, s->cur_func->scope_level);
                    }
                    if (js_parse_expect(s, ')'))
                        goto fail;
                }
                /* XXX: should keep the address to nop it out if there is no finally block */
                emit_goto(s, OP_catch, label_catch2);

                push_scope(s);  /* catch block */
                push_break_entry(s->cur_func, &block_env, JS_ATOM_NULL,
                                 -1, -1, 1);
                block_env.label_finally = label_finally;

                if (js_parse_block(s))
                    goto fail;

                pop_break_entry(s->cur_func);
                pop_scope(s);  /* catch block */
                pop_scope(s);  /* catch variable */

                if (js_is_live_code(s)) {
                    /* drop the catch2 offset */
                    emit_op(s, OP_drop);
                    /* XXX: should keep the address to nop it out if there is no finally block */
                    /* must push dummy value to keep same stack size */
                    emit_op(s, OP_undefined);
                    emit_goto(s, OP_gosub, label_finally);
                    emit_op(s, OP_drop);
                    emit_goto(s, OP_goto, label_end);
                }
                /* catch exceptions thrown in the catch block to execute the
                 * finally clause and rethrow the exception */
                emit_label(s, label_catch2);
                /* catch value is at TOS, no need to push undefined */
                emit_goto(s, OP_gosub, label_finally);
                emit_op(s, OP_throw);

            } else if (s->token.val == TOK_FINALLY) {
                /* finally without catch : execute the finally clause
                 * and rethrow the exception */
                emit_label(s, label_catch);
                /* catch value is at TOS, no need to push undefined */
                emit_goto(s, OP_gosub, label_finally);
                emit_op(s, OP_throw);
            } else {
                js_parse_error(s, "expecting catch or finally");
                goto fail;
            }
            emit_label(s, label_finally);
            if (s->token.val == TOK_FINALLY) {
                int saved_eval_ret_idx = 0; /* avoid warning */

                if (next_token(s))
                    goto fail;
                /* on the stack: ret_value gosub_ret_value */
                push_break_entry(s->cur_func, &block_env, JS_ATOM_NULL,
                                 -1, -1, 2);

                if (s->cur_func->eval_ret_idx >= 0) {
                    /* 'finally' updates eval_ret only if not a normal
                       termination */
                    saved_eval_ret_idx =
                        add_var(s->ctx, s->cur_func, JS_ATOM__ret_);
                    if (saved_eval_ret_idx < 0)
                        goto fail;
                    emit_op(s, OP_get_loc);
                    emit_u16(s, s->cur_func->eval_ret_idx);
                    emit_op(s, OP_put_loc);
                    emit_u16(s, saved_eval_ret_idx);
                    set_eval_ret_undefined(s);
                }

                if (js_parse_block(s))
                    goto fail;

                if (s->cur_func->eval_ret_idx >= 0) {
                    emit_op(s, OP_get_loc);
                    emit_u16(s, saved_eval_ret_idx);
                    emit_op(s, OP_put_loc);
                    emit_u16(s, s->cur_func->eval_ret_idx);
                }
                pop_break_entry(s->cur_func);
            }
            emit_op(s, OP_ret);
            emit_label(s, label_end);
        }
        break;
    case ';':
        /* empty statement */
        if (next_token(s))
            goto fail;
        break;
    case TOK_WITH:
        if (s->cur_func->js_mode & JS_MODE_STRICT) {
            js_parse_error(s, "invalid keyword: with");
            goto fail;
        } else {
            int with_idx;

            if (next_token(s))
                goto fail;

            if (js_parse_expr_paren(s))
                goto fail;

            push_scope(s);
            with_idx = define_var(s, s->cur_func, JS_ATOM__with_,
                                  JS_VAR_DEF_WITH);
            if (with_idx < 0)
                goto fail;
            emit_op(s, OP_to_object);
            emit_op(s, OP_put_loc);
            emit_u16(s, with_idx);

            set_eval_ret_undefined(s);
            if (js_parse_statement(s))
                goto fail;

            /* Popping scope drops lexical context for the with object variable */
            pop_scope(s);
        }
        break;
    case TOK_FUNCTION:
        /* ES6 Annex B.3.2 and B.3.3 semantics */
        if (!(decl_mask & DECL_MASK_FUNC))
            goto func_decl_error;
        if (!(decl_mask & DECL_MASK_OTHER) && peek_token(s, FALSE) == '*')
            goto func_decl_error;
        goto parse_func_var;
    case TOK_IDENT:
        if (s->token.u.ident.is_reserved) {
            js_parse_error_reserved_identifier(s);
            goto fail;
        }
        /* Determine if `let` introduces a Declaration or an ExpressionStatement */
        switch (is_let(s, decl_mask)) {
        case TRUE:
            tok = TOK_LET;
            goto haslet;
        case FALSE:
            break;
        default:
            goto fail;
        }
        if (token_is_pseudo_keyword(s, JS_ATOM_async) &&
            peek_token(s, TRUE) == TOK_FUNCTION) {
            if (!(decl_mask & DECL_MASK_OTHER)) {
            func_decl_error:
                js_parse_error(s, "function declarations can't appear in single-statement context");
                goto fail;
            }
        parse_func_var:
            if (js_parse_function_decl(s, JS_PARSE_FUNC_VAR,
                                       JS_FUNC_NORMAL, JS_ATOM_NULL,
                                       s->token.ptr, s->token.line_num))
                goto fail;
            break;
        }
        goto hasexpr;

    case TOK_CLASS:
        if (!(decl_mask & DECL_MASK_OTHER)) {
            js_parse_error(s, "class declarations can't appear in single-statement context");
            goto fail;
        }
        if (js_parse_class(s, FALSE, JS_PARSE_EXPORT_NONE))
            return -1;
        break;

    case TOK_DEBUGGER:
        /* currently no debugger, so just skip the keyword */
        if (next_token(s))
            goto fail;
        if (js_parse_expect_semi(s))
            goto fail;
        break;

    case TOK_ENUM:
    case TOK_EXPORT:
    case TOK_EXTENDS:
        js_unsupported_keyword(s, s->token.u.ident.atom);
        goto fail;

    default:
    hasexpr:
        if (js_parse_expr(s))
            goto fail;
        if (s->cur_func->eval_ret_idx >= 0) {
            /* store the expression value so that it can be returned
               by eval() */
            emit_op(s, OP_put_loc);
            emit_u16(s, s->cur_func->eval_ret_idx);
        } else {
            emit_op(s, OP_drop); /* drop the result */
        }
        if (js_parse_expect_semi(s))
            goto fail;
        break;
    }
done:
    JS_FreeAtom(ctx, label_name);
    return 0;
fail:
    JS_FreeAtom(ctx, label_name);
    return -1;
}

/* 'name' is freed */
static JSModuleDef *js_new_module_def(JSContext *ctx, JSAtom name)
{
    JSModuleDef *m;
    m = (JSModuleDef*) js_mallocz(ctx, sizeof(*m));
    if (!m) {
        JS_FreeAtom(ctx, name);
        return NULL;
    }
    m->header.ref_count = 1;
    m->module_name = name;
    m->module_ns = JS_UNDEFINED;
    m->func_obj = JS_UNDEFINED;
    m->eval_exception = JS_UNDEFINED;
    m->meta_obj = JS_UNDEFINED;
    list_add_tail(&m->link, &ctx->loaded_modules);
    return m;
}

static void js_mark_module_def(JSRuntime *rt, JSModuleDef *m,
                               JS_MarkFunc *mark_func)
{
    int i;

    for(i = 0; i < m->export_entries_count; i++) {
        JSExportEntry *me = &m->export_entries[i];
        if (me->export_type == JS_EXPORT_TYPE_LOCAL &&
            me->u.local.var_ref) {
            mark_func(rt, &me->u.local.var_ref->header);
        }
    }

    JS_MarkValue(rt, m->module_ns, mark_func);
    JS_MarkValue(rt, m->func_obj, mark_func);
    JS_MarkValue(rt, m->eval_exception, mark_func);
    JS_MarkValue(rt, m->meta_obj, mark_func);
}

static void js_free_module_def(JSContext *ctx, JSModuleDef *m)
{
    int i;

    JS_FreeAtom(ctx, m->module_name);

    for(i = 0; i < m->req_module_entries_count; i++) {
        JSReqModuleEntry *rme = &m->req_module_entries[i];
        JS_FreeAtom(ctx, rme->module_name);
    }
    js_free(ctx, m->req_module_entries);

    for(i = 0; i < m->export_entries_count; i++) {
        JSExportEntry *me = &m->export_entries[i];
        if (me->export_type == JS_EXPORT_TYPE_LOCAL)
            free_var_ref(ctx->rt, me->u.local.var_ref);
        JS_FreeAtom(ctx, me->export_name);
        JS_FreeAtom(ctx, me->local_name);
    }
    js_free(ctx, m->export_entries);

    js_free(ctx, m->star_export_entries);

    for(i = 0; i < m->import_entries_count; i++) {
        JSImportEntry *mi = &m->import_entries[i];
        JS_FreeAtom(ctx, mi->import_name);
    }
    js_free(ctx, m->import_entries);

    JS_FreeValue(ctx, m->module_ns);
    JS_FreeValue(ctx, m->func_obj);
    JS_FreeValue(ctx, m->eval_exception);
    JS_FreeValue(ctx, m->meta_obj);
    list_del(&m->link);
    js_free(ctx, m);
}

static int add_req_module_entry(JSContext *ctx, JSModuleDef *m,
                                JSAtom module_name)
{
    JSReqModuleEntry *rme;
    int i;

    /* no need to add the module request if it is already present */
    for(i = 0; i < m->req_module_entries_count; i++) {
        rme = &m->req_module_entries[i];
        if (rme->module_name == module_name)
            return i;
    }

    if (js_resize_array(ctx, (void **)&m->req_module_entries,
                        sizeof(JSReqModuleEntry),
                        &m->req_module_entries_size,
                        m->req_module_entries_count + 1))
        return -1;
    rme = &m->req_module_entries[m->req_module_entries_count++];
    rme->module_name = JS_DupAtom(ctx, module_name);
    rme->module = NULL;
    return i;
}

static JSExportEntry *find_export_entry(JSContext *ctx, JSModuleDef *m,
                                        JSAtom export_name)
{
    JSExportEntry *me;
    int i;
    for(i = 0; i < m->export_entries_count; i++) {
        me = &m->export_entries[i];
        if (me->export_name == export_name)
            return me;
    }
    return NULL;
}

static JSExportEntry *add_export_entry2(JSContext *ctx,
                                        JSParseState *s, JSModuleDef *m,
                                       JSAtom local_name, JSAtom export_name,
                                       JSExportTypeEnum export_type)
{
    JSExportEntry *me;

    if (find_export_entry(ctx, m, export_name)) {
        char buf1[ATOM_GET_STR_BUF_SIZE];
        if (s) {
            js_parse_error(s, "duplicate exported name '%s'",
                           JS_AtomGetStr(ctx, buf1, sizeof(buf1), export_name));
        } else {
            JS_ThrowSyntaxErrorAtom(ctx, "duplicate exported name '%s'", export_name);
        }
        return NULL;
    }

    if (js_resize_array(ctx, (void **)&m->export_entries,
                        sizeof(JSExportEntry),
                        &m->export_entries_size,
                        m->export_entries_count + 1))
        return NULL;
    me = &m->export_entries[m->export_entries_count++];
    memset(me, 0, sizeof(*me));
    me->local_name = JS_DupAtom(ctx, local_name);
    me->export_name = JS_DupAtom(ctx, export_name);
    me->export_type = export_type;
    return me;
}

static JSExportEntry *add_export_entry(JSParseState *s, JSModuleDef *m,
                                       JSAtom local_name, JSAtom export_name,
                                       JSExportTypeEnum export_type)
{
    return add_export_entry2(s->ctx, s, m, local_name, export_name,
                             export_type);
}

static int add_star_export_entry(JSContext *ctx, JSModuleDef *m,
                                 int req_module_idx)
{
    JSStarExportEntry *se;

    if (js_resize_array(ctx, (void **)&m->star_export_entries,
                        sizeof(JSStarExportEntry),
                        &m->star_export_entries_size,
                        m->star_export_entries_count + 1))
        return -1;
    se = &m->star_export_entries[m->star_export_entries_count++];
    se->req_module_idx = req_module_idx;
    return 0;
}

/* create a C module */
inline JSModuleDef *JS_NewCModule(JSContext *ctx, const char *name_str,
                           JSModuleInitFunc *func)
{
    JSModuleDef *m;
    JSAtom name;
    name = JS_NewAtom(ctx, name_str);
    if (name == JS_ATOM_NULL)
        return NULL;
    m = js_new_module_def(ctx, name);
    m->init_func = func;
    return m;
}

inline int JS_AddModuleExport(JSContext *ctx, JSModuleDef *m, const char *export_name)
{
    JSExportEntry *me;
    JSAtom name;
    name = JS_NewAtom(ctx, export_name);
    if (name == JS_ATOM_NULL)
        return -1;
    me = add_export_entry2(ctx, NULL, m, JS_ATOM_NULL, name,
                           JS_EXPORT_TYPE_LOCAL);
    JS_FreeAtom(ctx, name);
    if (!me)
        return -1;
    else
        return 0;
}

inline int JS_SetModuleExport(JSContext *ctx, JSModuleDef *m, const char *export_name,
                       JSValue val)
{
    JSExportEntry *me;
    JSAtom name;
    name = JS_NewAtom(ctx, export_name);
    if (name == JS_ATOM_NULL)
        goto fail;
    me = find_export_entry(ctx, m, name);
    JS_FreeAtom(ctx, name);
    if (!me)
        goto fail;
    set_value(ctx, me->u.local.var_ref->pvalue, val);
    return 0;
 fail:
    JS_FreeValue(ctx, val);
    return -1;
}

inline void JS_SetModuleLoaderFunc(JSRuntime *rt,
                            JSModuleNormalizeFunc *module_normalize,
                            JSModuleLoaderFunc *module_loader, void *opaque)
{
    rt->module_normalize_func = module_normalize;
    rt->module_loader_func = module_loader;
    rt->module_loader_opaque = opaque;
}

/* default module filename normalizer */
static char *js_default_module_normalize_name(JSContext *ctx,
                                              const char *base_name,
                                              const char *name)
{
    char *filename, *p;
    const char *r;
    int len;

    if (name[0] != '.') {
        /* if no initial dot, the module name is not modified */
        return js_strdup(ctx, name);
    }

    p = (char*) strrchr(base_name, '/');
    if (p)
        len = p - base_name;
    else
        len = 0;

    filename = (char*) js_malloc(ctx, len + strlen(name) + 1 + 1);
    if (!filename)
        return NULL;
    memcpy(filename, base_name, len);
    filename[len] = '\0';

    /* we only normalize the leading '..' or '.' */
    r = name;
    for(;;) {
        if (r[0] == '.' && r[1] == '/') {
            r += 2;
        } else if (r[0] == '.' && r[1] == '.' && r[2] == '/') {
            /* remove the last path element of filename, except if "."
               or ".." */
            if (filename[0] == '\0')
                break;
            p = strrchr(filename, '/');
            if (!p)
                p = filename;
            else
                p++;
            if (!strcmp(p, ".") || !strcmp(p, ".."))
                break;
            if (p > filename)
                p--;
            *p = '\0';
            r += 3;
        } else {
            break;
        }
    }
    if (filename[0] != '\0')
        strcat(filename, "/");
    strcat(filename, r);
    //    printf("normalize: %s %s -> %s\n", base_name, name, filename);
    return filename;
}

static JSModuleDef *js_find_loaded_module(JSContext *ctx, JSAtom name)
{
    struct list_head *el;
    JSModuleDef *m;

    /* first look at the loaded modules */
    list_for_each(el, &ctx->loaded_modules) {
        m = list_entry(el, JSModuleDef, link);
        if (m->module_name == name)
            return m;
    }
    return NULL;
}

/* return NULL in case of exception (e.g. module could not be loaded) */
static JSModuleDef *js_host_resolve_imported_module(JSContext *ctx,
                                                    const char *base_cname,
                                                    const char *cname1)
{
    JSRuntime *rt = ctx->rt;
    JSModuleDef *m;
    char *cname;
    JSAtom module_name;

    if (!rt->module_normalize_func) {
        cname = js_default_module_normalize_name(ctx, base_cname, cname1);
    } else {
        cname = rt->module_normalize_func(ctx, base_cname, cname1,
                                          rt->module_loader_opaque);
    }
    if (!cname)
        return NULL;

    module_name = JS_NewAtom(ctx, cname);
    if (module_name == JS_ATOM_NULL) {
        js_free(ctx, cname);
        return NULL;
    }

    /* first look at the loaded modules */
    m = js_find_loaded_module(ctx, module_name);
    if (m) {
        js_free(ctx, cname);
        JS_FreeAtom(ctx, module_name);
        return m;
    }

    JS_FreeAtom(ctx, module_name);

    /* load the module */
    if (!rt->module_loader_func) {
        /* XXX: use a syntax error ? */
        JS_ThrowReferenceError(ctx, "could not load module '%s'",
                               cname);
        js_free(ctx, cname);
        return NULL;
    }

    m = rt->module_loader_func(ctx, cname, rt->module_loader_opaque);
    js_free(ctx, cname);
    return m;
}

static JSModuleDef *js_host_resolve_imported_module_atom(JSContext *ctx,
                                                    JSAtom base_module_name,
                                                    JSAtom module_name1)
{
    const char *base_cname, *cname;
    JSModuleDef *m;

    base_cname = JS_AtomToCString(ctx, base_module_name);
    if (!base_cname)
        return NULL;
    cname = JS_AtomToCString(ctx, module_name1);
    if (!cname) {
        JS_FreeCString(ctx, base_cname);
        return NULL;
    }
    m = js_host_resolve_imported_module(ctx, base_cname, cname);
    JS_FreeCString(ctx, base_cname);
    JS_FreeCString(ctx, cname);
    return m;
}

typedef struct JSResolveEntry {
    JSModuleDef *module;
    JSAtom name;
} JSResolveEntry;

typedef struct JSResolveState {
    JSResolveEntry *array;
    int size;
    int count;
} JSResolveState;

static int find_resolve_entry(JSResolveState *s,
                              JSModuleDef *m, JSAtom name)
{
    int i;
    for(i = 0; i < s->count; i++) {
        JSResolveEntry *re = &s->array[i];
        if (re->module == m && re->name == name)
            return i;
    }
    return -1;
}

static int add_resolve_entry(JSContext *ctx, JSResolveState *s,
                             JSModuleDef *m, JSAtom name)
{
    JSResolveEntry *re;

    if (js_resize_array(ctx, (void **)&s->array,
                        sizeof(JSResolveEntry),
                        &s->size, s->count + 1))
        return -1;
    re = &s->array[s->count++];
    re->module = m;
    re->name = JS_DupAtom(ctx, name);
    return 0;
}

typedef enum JSResolveResultEnum {
    JS_RESOLVE_RES_EXCEPTION = -1, /* memory alloc error */
    JS_RESOLVE_RES_FOUND = 0,
    JS_RESOLVE_RES_NOT_FOUND,
    JS_RESOLVE_RES_CIRCULAR,
    JS_RESOLVE_RES_AMBIGUOUS,
} JSResolveResultEnum;

static JSResolveResultEnum js_resolve_export1(JSContext *ctx,
                                              JSModuleDef **pmodule,
                                              JSExportEntry **pme,
                                              JSModuleDef *m,
                                              JSAtom export_name,
                                              JSResolveState *s)
{
    JSExportEntry *me;

    *pmodule = NULL;
    *pme = NULL;
    if (find_resolve_entry(s, m, export_name) >= 0)
        return JS_RESOLVE_RES_CIRCULAR;
    if (add_resolve_entry(ctx, s, m, export_name) < 0)
        return JS_RESOLVE_RES_EXCEPTION;
    me = find_export_entry(ctx, m, export_name);
    if (me) {
        if (me->export_type == JS_EXPORT_TYPE_LOCAL) {
            /* local export */
            *pmodule = m;
            *pme = me;
            return JS_RESOLVE_RES_FOUND;
        } else {
            /* indirect export */
            JSModuleDef *m1;
            m1 = m->req_module_entries[me->u.req_module_idx].module;
            if (me->local_name == JS_ATOM__star_) {
                /* export ns from */
                *pmodule = m;
                *pme = me;
                return JS_RESOLVE_RES_FOUND;
            } else {
                return js_resolve_export1(ctx, pmodule, pme, m1,
                                          me->local_name, s);
            }
        }
    } else {
        if (export_name != JS_ATOM_default) {
            /* not found in direct or indirect exports: try star exports */
            int i;

            for(i = 0; i < m->star_export_entries_count; i++) {
                JSStarExportEntry *se = &m->star_export_entries[i];
                JSModuleDef *m1, *res_m;
                JSExportEntry *res_me;
                JSResolveResultEnum ret;

                m1 = m->req_module_entries[se->req_module_idx].module;
                ret = js_resolve_export1(ctx, &res_m, &res_me, m1,
                                         export_name, s);
                if (ret == JS_RESOLVE_RES_AMBIGUOUS ||
                    ret == JS_RESOLVE_RES_EXCEPTION) {
                    return ret;
                } else if (ret == JS_RESOLVE_RES_FOUND) {
                    if (*pme != NULL) {
                        if (*pmodule != res_m ||
                            res_me->local_name != (*pme)->local_name) {
                            *pmodule = NULL;
                            *pme = NULL;
                            return JS_RESOLVE_RES_AMBIGUOUS;
                        }
                    } else {
                        *pmodule = res_m;
                        *pme = res_me;
                    }
                }
            }
            if (*pme != NULL)
                return JS_RESOLVE_RES_FOUND;
        }
        return JS_RESOLVE_RES_NOT_FOUND;
    }
}

/* If the return value is JS_RESOLVE_RES_FOUND, return the module
  (*pmodule) and the corresponding local export entry
  (*pme). Otherwise return (NULL, NULL) */
static JSResolveResultEnum js_resolve_export(JSContext *ctx,
                                             JSModuleDef **pmodule,
                                             JSExportEntry **pme,
                                             JSModuleDef *m,
                                             JSAtom export_name)
{
    JSResolveState ss, *s = &ss;
    int i;
    JSResolveResultEnum ret;

    s->array = NULL;
    s->size = 0;
    s->count = 0;

    ret = js_resolve_export1(ctx, pmodule, pme, m, export_name, s);

    for(i = 0; i < s->count; i++)
        JS_FreeAtom(ctx, s->array[i].name);
    js_free(ctx, s->array);

    return ret;
}

static void js_resolve_export_throw_error(JSContext *ctx,
                                          JSResolveResultEnum res,
                                          JSModuleDef *m, JSAtom export_name)
{
    char buf1[ATOM_GET_STR_BUF_SIZE];
    char buf2[ATOM_GET_STR_BUF_SIZE];
    switch(res) {
    case JS_RESOLVE_RES_EXCEPTION:
        break;
    default:
    case JS_RESOLVE_RES_NOT_FOUND:
        JS_ThrowSyntaxError(ctx, "Could not find export '%s' in module '%s'",
                            JS_AtomGetStr(ctx, buf1, sizeof(buf1), export_name),
                            JS_AtomGetStr(ctx, buf2, sizeof(buf2), m->module_name));
        break;
    case JS_RESOLVE_RES_CIRCULAR:
        JS_ThrowSyntaxError(ctx, "circular reference when looking for export '%s' in module '%s'",
                            JS_AtomGetStr(ctx, buf1, sizeof(buf1), export_name),
                            JS_AtomGetStr(ctx, buf2, sizeof(buf2), m->module_name));
        break;
    case JS_RESOLVE_RES_AMBIGUOUS:
        JS_ThrowSyntaxError(ctx, "export '%s' in module '%s' is ambiguous",
                            JS_AtomGetStr(ctx, buf1, sizeof(buf1), export_name),
                            JS_AtomGetStr(ctx, buf2, sizeof(buf2), m->module_name));
        break;
    }
}


typedef enum {
    EXPORTED_NAME_AMBIGUOUS,
    EXPORTED_NAME_NORMAL,
    EXPORTED_NAME_NS,
} ExportedNameEntryEnum;

typedef struct ExportedNameEntry {
    JSAtom export_name;
    ExportedNameEntryEnum export_type;
    union {
        JSExportEntry *me; /* using when the list is built */
        JSVarRef *var_ref; /* EXPORTED_NAME_NORMAL */
        JSModuleDef *module; /* for EXPORTED_NAME_NS */
    } u;
} ExportedNameEntry;

typedef struct GetExportNamesState {
    JSModuleDef **modules;
    int modules_size;
    int modules_count;

    ExportedNameEntry *exported_names;
    int exported_names_size;
    int exported_names_count;
} GetExportNamesState;

static int find_exported_name(GetExportNamesState *s, JSAtom name)
{
    int i;
    for(i = 0; i < s->exported_names_count; i++) {
        if (s->exported_names[i].export_name == name)
            return i;
    }
    return -1;
}

[[nodiscard]] static int get_exported_names(JSContext *ctx,
                                          GetExportNamesState *s,
                                          JSModuleDef *m, BOOL from_star)
{
    ExportedNameEntry *en;
    int i, j;

    /* check circular reference */
    for(i = 0; i < s->modules_count; i++) {
        if (s->modules[i] == m)
            return 0;
    }
    if (js_resize_array(ctx, (void **)&s->modules, sizeof(s->modules[0]),
                        &s->modules_size, s->modules_count + 1))
        return -1;
    s->modules[s->modules_count++] = m;

    for(i = 0; i < m->export_entries_count; i++) {
        JSExportEntry *me = &m->export_entries[i];
        if (from_star && me->export_name == JS_ATOM_default)
            continue;
        j = find_exported_name(s, me->export_name);
        if (j < 0) {
            if (js_resize_array(ctx, (void **)&s->exported_names, sizeof(s->exported_names[0]),
                                &s->exported_names_size,
                                s->exported_names_count + 1))
                return -1;
            en = &s->exported_names[s->exported_names_count++];
            en->export_name = me->export_name;
            /* avoid a second lookup for simple module exports */
            if (from_star || me->export_type != JS_EXPORT_TYPE_LOCAL)
                en->u.me = NULL;
            else
                en->u.me = me;
        } else {
            en = &s->exported_names[j];
            en->u.me = NULL;
        }
    }
    for(i = 0; i < m->star_export_entries_count; i++) {
        JSStarExportEntry *se = &m->star_export_entries[i];
        JSModuleDef *m1;
        m1 = m->req_module_entries[se->req_module_idx].module;
        if (get_exported_names(ctx, s, m1, TRUE))
            return -1;
    }
    return 0;
}

/* Unfortunately, the spec gives a different behavior from GetOwnProperty ! */
static int js_module_ns_has(JSContext *ctx, JSValueConst obj, JSAtom atom)
{
    return (find_own_property1(JS_VALUE_GET_OBJ(obj), atom) != NULL);
}

inline const JSClassExoticMethods js_module_ns_exotic_methods = {
    nullptr, nullptr, nullptr, nullptr, js_module_ns_has, nullptr, nullptr
};

static int exported_names_cmp(const void *p1, const void *p2, void *opaque)
{
    auto ctx = (JSContext*) opaque;
    auto me1 = (const ExportedNameEntry*) p1;
    auto me2 = (const ExportedNameEntry*) p2;
    JSValue str1, str2;
    int ret;

    /* XXX: should avoid allocation memory in atom comparison */
    str1 = JS_AtomToString(ctx, me1->export_name);
    str2 = JS_AtomToString(ctx, me2->export_name);
    if (JS_IsException(str1) || JS_IsException(str2)) {
        /* XXX: raise an error ? */
        ret = 0;
    } else {
        ret = js_string_compare(ctx, JS_VALUE_GET_STRING(str1),
                                JS_VALUE_GET_STRING(str2));
    }
    JS_FreeValue(ctx, str1);
    JS_FreeValue(ctx, str2);
    return ret;
}

static JSValue js_get_module_ns(JSContext *ctx, JSModuleDef *m);

static JSValue js_module_ns_autoinit(JSContext *ctx, JSObject *p, JSAtom atom,
                                     void *opaque)
{
    auto m = (JSModuleDef*) opaque;
    return js_get_module_ns(ctx, m);
}

static JSValue js_build_module_ns(JSContext *ctx, JSModuleDef *m)
{
    JSValue obj;
    JSObject *p;
    GetExportNamesState s_s, *s = &s_s;
    int i, ret;
    JSProperty *pr;

    obj = JS_NewObjectClass(ctx, JS_CLASS_MODULE_NS);
    if (JS_IsException(obj))
        return obj;
    p = JS_VALUE_GET_OBJ(obj);

    memset(s, 0, sizeof(*s));
    ret = get_exported_names(ctx, s, m, FALSE);
    js_free(ctx, s->modules);
    if (ret)
        goto fail;

    /* Resolve the exported names. The ambiguous exports are removed */
    for(i = 0; i < s->exported_names_count; i++) {
        ExportedNameEntry *en = &s->exported_names[i];
        JSResolveResultEnum res;
        JSExportEntry *res_me;
        JSModuleDef *res_m;

        if (en->u.me) {
            res_me = en->u.me; /* fast case: no resolution needed */
            res_m = m;
            res = JS_RESOLVE_RES_FOUND;
        } else {
            res = js_resolve_export(ctx, &res_m, &res_me, m,
                                    en->export_name);
        }
        if (res != JS_RESOLVE_RES_FOUND) {
            if (res != JS_RESOLVE_RES_AMBIGUOUS) {
                js_resolve_export_throw_error(ctx, res, m, en->export_name);
                goto fail;
            }
            en->export_type = EXPORTED_NAME_AMBIGUOUS;
        } else {
            if (res_me->local_name == JS_ATOM__star_) {
                en->export_type = EXPORTED_NAME_NS;
                en->u.module = res_m->req_module_entries[res_me->u.req_module_idx].module;
            } else {
                en->export_type = EXPORTED_NAME_NORMAL;
                if (res_me->u.local.var_ref) {
                    en->u.var_ref = res_me->u.local.var_ref;
                } else {
                    JSObject *p1 = JS_VALUE_GET_OBJ(res_m->func_obj);
                    p1 = JS_VALUE_GET_OBJ(res_m->func_obj);
                    en->u.var_ref = p1->u.func.var_refs[res_me->u.local.var_idx];
                }
            }
        }
    }

    /* sort the exported names */
    rqsort(s->exported_names, s->exported_names_count,
           sizeof(s->exported_names[0]), exported_names_cmp, ctx);

    for(i = 0; i < s->exported_names_count; i++) {
        ExportedNameEntry *en = &s->exported_names[i];
        switch(en->export_type) {
        case EXPORTED_NAME_NORMAL:
            {
                JSVarRef *var_ref = en->u.var_ref;
                pr = add_property(ctx, p, en->export_name,
                                  JS_PROP_ENUMERABLE | JS_PROP_WRITABLE |
                                  JS_PROP_VARREF);
                if (!pr)
                    goto fail;
                var_ref->header.ref_count++;
                pr->u.var_ref = var_ref;
            }
            break;
        case EXPORTED_NAME_NS:
            /* the exported namespace must be created on demand */
            if (JS_DefineAutoInitProperty(ctx, obj,
                                          en->export_name,
                                          JS_AUTOINIT_ID_MODULE_NS,
                                          en->u.module, JS_PROP_ENUMERABLE | JS_PROP_WRITABLE) < 0)
                goto fail;
            break;
        default:
            break;
        }
    }

    js_free(ctx, s->exported_names);

    JS_DefinePropertyValue(ctx, obj, JS_ATOM_Symbol_toStringTag,
                           JS_AtomToString(ctx, JS_ATOM_Module),
                           0);

    p->extensible = FALSE;
    return obj;
 fail:
    js_free(ctx, s->exported_names);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_get_module_ns(JSContext *ctx, JSModuleDef *m)
{
    if (JS_IsUndefined(m->module_ns)) {
        JSValue val;
        val = js_build_module_ns(ctx, m);
        if (JS_IsException(val))
            return JS_EXCEPTION;
        m->module_ns = val;
    }
    return JS_DupValue(ctx, m->module_ns);
}

/* Load all the required modules for module 'm' */
static int js_resolve_module(JSContext *ctx, JSModuleDef *m)
{
    int i;
    JSModuleDef *m1;

    if (m->resolved)
        return 0;
#ifdef DUMP_MODULE_RESOLVE
    {
        char buf1[ATOM_GET_STR_BUF_SIZE];
        printf("resolving module '%s':\n", JS_AtomGetStr(ctx, buf1, sizeof(buf1), m->module_name));
    }
#endif
    m->resolved = TRUE;
    /* resolve each requested module */
    for(i = 0; i < m->req_module_entries_count; i++) {
        JSReqModuleEntry *rme = &m->req_module_entries[i];
        m1 = js_host_resolve_imported_module_atom(ctx, m->module_name,
                                                  rme->module_name);
        if (!m1)
            return -1;
        rme->module = m1;
        /* already done in js_host_resolve_imported_module() except if
           the module was loaded with JS_EvalBinary() */
        if (js_resolve_module(ctx, m1) < 0)
            return -1;
    }
    return 0;
}

static JSVarRef *js_create_module_var(JSContext *ctx, BOOL is_lexical)
{
    JSVarRef *var_ref;
    var_ref = (JSVarRef*) js_malloc(ctx, sizeof(JSVarRef));
    if (!var_ref)
        return NULL;
    var_ref->header.ref_count = 1;
    if (is_lexical)
        var_ref->value = JS_UNINITIALIZED;
    else
        var_ref->value = JS_UNDEFINED;
    var_ref->pvalue = &var_ref->value;
    var_ref->is_detached = TRUE;
    add_gc_object(ctx->rt, &var_ref->header, JS_GC_OBJ_TYPE_VAR_REF);
    return var_ref;
}

/* Create the <eval> function associated with the module */
static int js_create_module_bytecode_function(JSContext *ctx, JSModuleDef *m)
{
    JSFunctionBytecode *b;
    int i;
    JSVarRef **var_refs;
    JSValue func_obj, bfunc;
    JSObject *p;

    bfunc = m->func_obj;
    func_obj = JS_NewObjectProtoClass(ctx, ctx->function_proto,
                                      JS_CLASS_BYTECODE_FUNCTION);

    if (JS_IsException(func_obj))
        return -1;
    b = (JSFunctionBytecode*) JS_VALUE_GET_PTR(bfunc);

    p = JS_VALUE_GET_OBJ(func_obj);
    p->u.func.function_bytecode = b;
    b->header.ref_count++;
    p->u.func.home_object = NULL;
    p->u.func.var_refs = NULL;
    if (b->closure_var_count) {
        var_refs = (JSVarRef**) js_mallocz(ctx, sizeof(var_refs[0]) * b->closure_var_count);
        if (!var_refs)
            goto fail;
        p->u.func.var_refs = var_refs;

        /* create the global variables. The other variables are
           imported from other modules */
        for(i = 0; i < b->closure_var_count; i++) {
            JSClosureVar *cv = &b->closure_var[i];
            JSVarRef *var_ref;
            if (cv->is_local) {
                var_ref = js_create_module_var(ctx, cv->is_lexical);
                if (!var_ref)
                    goto fail;
#ifdef DUMP_MODULE_RESOLVE
                printf("local %d: %p\n", i, var_ref);
#endif
                var_refs[i] = var_ref;
            }
        }
    }
    m->func_obj = func_obj;
    JS_FreeValue(ctx, bfunc);
    return 0;
 fail:
    JS_FreeValue(ctx, func_obj);
    return -1;
}

/* must be done before js_link_module() because of cyclic references */
static int js_create_module_function(JSContext *ctx, JSModuleDef *m)
{
    BOOL is_c_module;
    int i;
    JSVarRef *var_ref;

    if (m->func_created)
        return 0;

    is_c_module = (m->init_func != NULL);

    if (is_c_module) {
        /* initialize the exported variables */
        for(i = 0; i < m->export_entries_count; i++) {
            JSExportEntry *me = &m->export_entries[i];
            if (me->export_type == JS_EXPORT_TYPE_LOCAL) {
                var_ref = js_create_module_var(ctx, FALSE);
                if (!var_ref)
                    return -1;
                me->u.local.var_ref = var_ref;
            }
        }
    } else {
        if (js_create_module_bytecode_function(ctx, m))
            return -1;
    }
    m->func_created = TRUE;

    /* do it on the dependencies */

    for(i = 0; i < m->req_module_entries_count; i++) {
        JSReqModuleEntry *rme = &m->req_module_entries[i];
        if (js_create_module_function(ctx, rme->module) < 0)
            return -1;
    }

    return 0;
}


/* Prepare a module to be executed by resolving all the imported
   variables. */
static int js_link_module(JSContext *ctx, JSModuleDef *m)
{
    int i;
    JSImportEntry *mi;
    JSModuleDef *m1;
    JSVarRef **var_refs, *var_ref;
    JSObject *p;
    BOOL is_c_module;
    JSValue ret_val;

    if (m->instantiated)
        return 0;
    m->instantiated = TRUE;

#ifdef DUMP_MODULE_RESOLVE
    {
        char buf1[ATOM_GET_STR_BUF_SIZE];
        printf("start instantiating module '%s':\n", JS_AtomGetStr(ctx, buf1, sizeof(buf1), m->module_name));
    }
#endif

    for(i = 0; i < m->req_module_entries_count; i++) {
        JSReqModuleEntry *rme = &m->req_module_entries[i];
        if (js_link_module(ctx, rme->module) < 0)
            goto fail;
    }

#ifdef DUMP_MODULE_RESOLVE
    {
        char buf1[ATOM_GET_STR_BUF_SIZE];
        printf("instantiating module '%s':\n", JS_AtomGetStr(ctx, buf1, sizeof(buf1), m->module_name));
    }
#endif
    /* check the indirect exports */
    for(i = 0; i < m->export_entries_count; i++) {
        JSExportEntry *me = &m->export_entries[i];
        if (me->export_type == JS_EXPORT_TYPE_INDIRECT &&
            me->local_name != JS_ATOM__star_) {
            JSResolveResultEnum ret;
            JSExportEntry *res_me;
            JSModuleDef *res_m, *m1;
            m1 = m->req_module_entries[me->u.req_module_idx].module;
            ret = js_resolve_export(ctx, &res_m, &res_me, m1, me->local_name);
            if (ret != JS_RESOLVE_RES_FOUND) {
                js_resolve_export_throw_error(ctx, ret, m, me->export_name);
                goto fail;
            }
        }
    }

#ifdef DUMP_MODULE_RESOLVE
    {
        printf("exported bindings:\n");
        for(i = 0; i < m->export_entries_count; i++) {
            JSExportEntry *me = &m->export_entries[i];
            printf(" name="); print_atom(ctx, me->export_name);
            printf(" local="); print_atom(ctx, me->local_name);
            printf(" type=%d idx=%d\n", me->export_type, me->u.local.var_idx);
        }
    }
#endif

    is_c_module = (m->init_func != NULL);

    if (!is_c_module) {
        p = JS_VALUE_GET_OBJ(m->func_obj);
        var_refs = p->u.func.var_refs;

        for(i = 0; i < m->import_entries_count; i++) {
            mi = &m->import_entries[i];
#ifdef DUMP_MODULE_RESOLVE
            printf("import var_idx=%d name=", mi->var_idx);
            print_atom(ctx, mi->import_name);
            printf(": ");
#endif
            m1 = m->req_module_entries[mi->req_module_idx].module;
            if (mi->import_name == JS_ATOM__star_) {
                JSValue val;
                /* name space import */
                val = js_get_module_ns(ctx, m1);
                if (JS_IsException(val))
                    goto fail;
                set_value(ctx, &var_refs[mi->var_idx]->value, val);
#ifdef DUMP_MODULE_RESOLVE
                printf("namespace\n");
#endif
            } else {
                JSResolveResultEnum ret;
                JSExportEntry *res_me;
                JSModuleDef *res_m;
                JSObject *p1;

                ret = js_resolve_export(ctx, &res_m,
                                        &res_me, m1, mi->import_name);
                if (ret != JS_RESOLVE_RES_FOUND) {
                    js_resolve_export_throw_error(ctx, ret, m1, mi->import_name);
                    goto fail;
                }
                if (res_me->local_name == JS_ATOM__star_) {
                    JSValue val;
                    JSModuleDef *m2;
                    /* name space import from */
                    m2 = res_m->req_module_entries[res_me->u.req_module_idx].module;
                    val = js_get_module_ns(ctx, m2);
                    if (JS_IsException(val))
                        goto fail;
                    var_ref = js_create_module_var(ctx, TRUE);
                    if (!var_ref) {
                        JS_FreeValue(ctx, val);
                        goto fail;
                    }
                    set_value(ctx, &var_ref->value, val);
                    var_refs[mi->var_idx] = var_ref;
#ifdef DUMP_MODULE_RESOLVE
                    printf("namespace from\n");
#endif
                } else {
                    var_ref = res_me->u.local.var_ref;
                    if (!var_ref) {
                        p1 = JS_VALUE_GET_OBJ(res_m->func_obj);
                        var_ref = p1->u.func.var_refs[res_me->u.local.var_idx];
                    }
                    var_ref->header.ref_count++;
                    var_refs[mi->var_idx] = var_ref;
#ifdef DUMP_MODULE_RESOLVE
                    printf("local export (var_ref=%p)\n", var_ref);
#endif
                }
            }
        }

        /* keep the exported variables in the module export entries (they
           are used when the eval function is deleted and cannot be
           initialized before in case imports are exported) */
        for(i = 0; i < m->export_entries_count; i++) {
            JSExportEntry *me = &m->export_entries[i];
            if (me->export_type == JS_EXPORT_TYPE_LOCAL) {
                var_ref = var_refs[me->u.local.var_idx];
                var_ref->header.ref_count++;
                me->u.local.var_ref = var_ref;
            }
        }

        /* initialize the global variables */
        ret_val = JS_Call(ctx, m->func_obj, JS_TRUE, 0, NULL);
        if (JS_IsException(ret_val))
            goto fail;
        JS_FreeValue(ctx, ret_val);
    }

#ifdef DUMP_MODULE_RESOLVE
    printf("done instantiate\n");
#endif
    return 0;
 fail:
    return -1;
}

/* return JS_ATOM_NULL if the name cannot be found. Only works with
   not striped bytecode functions. */
inline JSAtom JS_GetScriptOrModuleName(JSContext *ctx, int n_stack_levels)
{
    JSStackFrame *sf;
    JSFunctionBytecode *b;
    JSObject *p;
    /* XXX: currently we just use the filename of the englobing
       function. It does not work for eval(). Need to add a
       ScriptOrModule info in JSFunctionBytecode */
    sf = ctx->rt->current_stack_frame;
    if (!sf)
        return JS_ATOM_NULL;
    while (n_stack_levels-- > 0) {
        sf = sf->prev_frame;
        if (!sf)
            return JS_ATOM_NULL;
    }
    if (JS_VALUE_GET_TAG(sf->cur_func) != JS_TAG_OBJECT)
        return JS_ATOM_NULL;
    p = JS_VALUE_GET_OBJ(sf->cur_func);
    if (!js_class_has_bytecode(p->class_id))
        return JS_ATOM_NULL;
    b = p->u.func.function_bytecode;
    if (!b->has_debug)
        return JS_ATOM_NULL;
    return JS_DupAtom(ctx, b->debug.filename);
}

inline JSAtom JS_GetModuleName(JSContext *ctx, JSModuleDef *m)
{
    return JS_DupAtom(ctx, m->module_name);
}

inline JSValue JS_GetImportMeta(JSContext *ctx, JSModuleDef *m)
{
    JSValue obj;
    /* allocate meta_obj only if requested to save memory */
    obj = m->meta_obj;
    if (JS_IsUndefined(obj)) {
        obj = JS_NewObjectProto(ctx, JS_NULL);
        if (JS_IsException(obj))
            return JS_EXCEPTION;
        m->meta_obj = obj;
    }
    return JS_DupValue(ctx, obj);
}

static JSValue js_import_meta(JSContext *ctx)
{
    JSAtom filename;
    JSModuleDef *m;

    filename = JS_GetScriptOrModuleName(ctx, 0);
    if (filename == JS_ATOM_NULL)
        goto fail;

    /* XXX: inefficient, need to add a module or script pointer in
       JSFunctionBytecode */
    m = js_find_loaded_module(ctx, filename);
    JS_FreeAtom(ctx, filename);
    if (!m) {
    fail:
        JS_ThrowTypeError(ctx, "import.meta not supported in this context");
        return JS_EXCEPTION;
    }
    return JS_GetImportMeta(ctx, m);
}

/* used by os.Worker() and import() */
inline JSModuleDef *JS_RunModule(JSContext *ctx, const char *basename,
                          const char *filename)
{
    JSModuleDef *m;
    JSValue ret, func_obj;

    m = js_host_resolve_imported_module(ctx, basename, filename);
    if (!m)
        return NULL;

    if (js_resolve_module(ctx, m) < 0) {
        js_free_modules(ctx, JS_FREE_MODULE_NOT_RESOLVED);
        return NULL;
    }

    /* Evaluate the module code */
    func_obj = JS_DupValue(ctx, JS_MKPTR(JS_TAG_MODULE, m));
    ret = JS_EvalFunction(ctx, func_obj);
    if (JS_IsException(ret))
        return NULL;
    JS_FreeValue(ctx, ret);
    return m;
}

static JSValue js_dynamic_import_job(JSContext *ctx,
                                     int argc, JSValueConst *argv)
{
    JSValueConst *resolving_funcs = argv;
    JSValueConst basename_val = argv[2];
    JSValueConst specifier = argv[3];
    JSModuleDef *m;
    const char *basename = NULL, *filename;
    JSValue ret, err, ns;

    if (!JS_IsString(basename_val)) {
        JS_ThrowTypeError(ctx, "no function filename for import()");
        goto exception;
    }
    basename = JS_ToCString(ctx, basename_val);
    if (!basename)
        goto exception;

    filename = JS_ToCString(ctx, specifier);
    if (!filename)
        goto exception;

    m = JS_RunModule(ctx, basename, filename);
    JS_FreeCString(ctx, filename);
    if (!m)
        goto exception;

    /* return the module namespace */
    ns = js_get_module_ns(ctx, m);
    if (JS_IsException(ns))
        goto exception;

    ret = JS_Call(ctx, resolving_funcs[0], JS_UNDEFINED,
                   1, (JSValueConst *)&ns);
    JS_FreeValue(ctx, ret); /* XXX: what to do if exception ? */
    JS_FreeValue(ctx, ns);
    JS_FreeCString(ctx, basename);
    return JS_UNDEFINED;
 exception:

    err = JS_GetException(ctx);
    ret = JS_Call(ctx, resolving_funcs[1], JS_UNDEFINED,
                   1, (JSValueConst *)&err);
    JS_FreeValue(ctx, ret); /* XXX: what to do if exception ? */
    JS_FreeValue(ctx, err);
    JS_FreeCString(ctx, basename);
    return JS_UNDEFINED;
}

static JSValue js_dynamic_import(JSContext *ctx, JSValueConst specifier)
{
    JSAtom basename;
    JSValue promise, resolving_funcs[2], basename_val;
    JSValueConst args[4];

    basename = JS_GetScriptOrModuleName(ctx, 0);
    if (basename == JS_ATOM_NULL)
        basename_val = JS_NULL;
    else
        basename_val = JS_AtomToValue(ctx, basename);
    JS_FreeAtom(ctx, basename);
    if (JS_IsException(basename_val))
        return basename_val;

    promise = JS_NewPromiseCapability(ctx, resolving_funcs);
    if (JS_IsException(promise)) {
        JS_FreeValue(ctx, basename_val);
        return promise;
    }

    args[0] = resolving_funcs[0];
    args[1] = resolving_funcs[1];
    args[2] = basename_val;
    args[3] = specifier;

    JS_EnqueueJob(ctx, js_dynamic_import_job, 4, args);

    JS_FreeValue(ctx, basename_val);
    JS_FreeValue(ctx, resolving_funcs[0]);
    JS_FreeValue(ctx, resolving_funcs[1]);
    return promise;
}

/* Run the <eval> function of the module and of all its requested
   modules. */
static JSValue js_evaluate_module(JSContext *ctx, JSModuleDef *m)
{
    JSModuleDef *m1;
    int i;
    JSValue ret_val;

    if (m->eval_mark)
        return JS_UNDEFINED; /* avoid cycles */

    if (m->evaluated) {
        /* if the module was already evaluated, rethrow the exception
           it raised */
        if (m->eval_has_exception) {
            return JS_Throw(ctx, JS_DupValue(ctx, m->eval_exception));
        } else {
            return JS_UNDEFINED;
        }
    }

    m->eval_mark = TRUE;

    for(i = 0; i < m->req_module_entries_count; i++) {
        JSReqModuleEntry *rme = &m->req_module_entries[i];
        m1 = rme->module;
        if (!m1->eval_mark) {
            ret_val = js_evaluate_module(ctx, m1);
            if (JS_IsException(ret_val)) {
                m->eval_mark = FALSE;
                return ret_val;
            }
            JS_FreeValue(ctx, ret_val);
        }
    }

    if (m->init_func) {
        /* C module init */
        if (m->init_func(ctx, m) < 0)
            ret_val = JS_EXCEPTION;
        else
            ret_val = JS_UNDEFINED;
    } else {
        ret_val = JS_CallFree(ctx, m->func_obj, JS_UNDEFINED, 0, NULL);
        m->func_obj = JS_UNDEFINED;
    }
    if (JS_IsException(ret_val)) {
        /* save the thrown exception value */
        m->eval_has_exception = TRUE;
        m->eval_exception = JS_DupValue(ctx, ctx->rt->current_exception);
    }
    m->eval_mark = FALSE;
    m->evaluated = TRUE;
    return ret_val;
}

[[nodiscard]] static JSAtom js_parse_from_clause(JSParseState *s)
{
    JSAtom module_name;
    if (!token_is_pseudo_keyword(s, JS_ATOM_from)) {
        js_parse_error(s, "from clause expected");
        return JS_ATOM_NULL;
    }
    if (next_token(s))
        return JS_ATOM_NULL;
    if (s->token.val != TOK_STRING) {
        js_parse_error(s, "string expected");
        return JS_ATOM_NULL;
    }
    module_name = JS_ValueToAtom(s->ctx, s->token.u.str.str);
    if (module_name == JS_ATOM_NULL)
        return JS_ATOM_NULL;
    if (next_token(s)) {
        JS_FreeAtom(s->ctx, module_name);
        return JS_ATOM_NULL;
    }
    return module_name;
}

[[nodiscard]] static int js_parse_export(JSParseState *s)
{
    JSContext *ctx = s->ctx;
    JSModuleDef *m = s->cur_func->module;
    JSAtom local_name, export_name;
    int first_export, idx, i, tok;
    JSAtom module_name;
    JSExportEntry *me;

    if (next_token(s))
        return -1;

    tok = s->token.val;
    if (tok == TOK_CLASS) {
        return js_parse_class(s, FALSE, JS_PARSE_EXPORT_NAMED);
    } else if (tok == TOK_FUNCTION ||
               (token_is_pseudo_keyword(s, JS_ATOM_async) &&
                peek_token(s, TRUE) == TOK_FUNCTION)) {
        return js_parse_function_decl2(s, JS_PARSE_FUNC_STATEMENT,
                                       JS_FUNC_NORMAL, JS_ATOM_NULL,
                                       s->token.ptr, s->token.line_num,
                                       JS_PARSE_EXPORT_NAMED, NULL);
    }

    if (next_token(s))
        return -1;

    switch(tok) {
    case '{':
        first_export = m->export_entries_count;
        while (s->token.val != '}') {
            if (!token_is_ident(s->token.val)) {
                js_parse_error(s, "identifier expected");
                return -1;
            }
            local_name = JS_DupAtom(ctx, s->token.u.ident.atom);
            export_name = JS_ATOM_NULL;
            if (next_token(s))
                goto fail;
            if (token_is_pseudo_keyword(s, JS_ATOM_as)) {
                if (next_token(s))
                    goto fail;
                if (!token_is_ident(s->token.val)) {
                    js_parse_error(s, "identifier expected");
                    goto fail;
                }
                export_name = JS_DupAtom(ctx, s->token.u.ident.atom);
                if (next_token(s)) {
                fail:
                    JS_FreeAtom(ctx, local_name);
                fail1:
                    JS_FreeAtom(ctx, export_name);
                    return -1;
                }
            } else {
                export_name = JS_DupAtom(ctx, local_name);
            }
            me = add_export_entry(s, m, local_name, export_name,
                                  JS_EXPORT_TYPE_LOCAL);
            JS_FreeAtom(ctx, local_name);
            JS_FreeAtom(ctx, export_name);
            if (!me)
                return -1;
            if (s->token.val != ',')
                break;
            if (next_token(s))
                return -1;
        }
        if (js_parse_expect(s, '}'))
            return -1;
        if (token_is_pseudo_keyword(s, JS_ATOM_from)) {
            module_name = js_parse_from_clause(s);
            if (module_name == JS_ATOM_NULL)
                return -1;
            idx = add_req_module_entry(ctx, m, module_name);
            JS_FreeAtom(ctx, module_name);
            if (idx < 0)
                return -1;
            for(i = first_export; i < m->export_entries_count; i++) {
                me = &m->export_entries[i];
                me->export_type = JS_EXPORT_TYPE_INDIRECT;
                me->u.req_module_idx = idx;
            }
        }
        break;
    case '*':
        if (token_is_pseudo_keyword(s, JS_ATOM_as)) {
            /* export ns from */
            if (next_token(s))
                return -1;
            if (!token_is_ident(s->token.val)) {
                js_parse_error(s, "identifier expected");
                return -1;
            }
            export_name = JS_DupAtom(ctx, s->token.u.ident.atom);
            if (next_token(s))
                goto fail1;
            module_name = js_parse_from_clause(s);
            if (module_name == JS_ATOM_NULL)
                goto fail1;
            idx = add_req_module_entry(ctx, m, module_name);
            JS_FreeAtom(ctx, module_name);
            if (idx < 0)
                goto fail1;
            me = add_export_entry(s, m, JS_ATOM__star_, export_name,
                                  JS_EXPORT_TYPE_INDIRECT);
            JS_FreeAtom(ctx, export_name);
            if (!me)
                return -1;
            me->u.req_module_idx = idx;
        } else {
            module_name = js_parse_from_clause(s);
            if (module_name == JS_ATOM_NULL)
                return -1;
            idx = add_req_module_entry(ctx, m, module_name);
            JS_FreeAtom(ctx, module_name);
            if (idx < 0)
                return -1;
            if (add_star_export_entry(ctx, m, idx) < 0)
                return -1;
        }
        break;
    case TOK_DEFAULT:
        if (s->token.val == TOK_CLASS) {
            return js_parse_class(s, FALSE, JS_PARSE_EXPORT_DEFAULT);
        } else if (s->token.val == TOK_FUNCTION ||
                   (token_is_pseudo_keyword(s, JS_ATOM_async) &&
                    peek_token(s, TRUE) == TOK_FUNCTION)) {
            return js_parse_function_decl2(s, JS_PARSE_FUNC_STATEMENT,
                                           JS_FUNC_NORMAL, JS_ATOM_NULL,
                                           s->token.ptr, s->token.line_num,
                                           JS_PARSE_EXPORT_DEFAULT, NULL);
        } else {
            if (js_parse_assign_expr(s))
                return -1;
        }
        /* set the name of anonymous functions */
        set_object_name(s, JS_ATOM_default);

        /* store the value in the _default_ global variable and export
           it */
        local_name = JS_ATOM__default_;
        if (define_var(s, s->cur_func, local_name, JS_VAR_DEF_LET) < 0)
            return -1;
        emit_op(s, OP_scope_put_var_init);
        emit_atom(s, local_name);
        emit_u16(s, 0);

        if (!add_export_entry(s, m, local_name, JS_ATOM_default,
                              JS_EXPORT_TYPE_LOCAL))
            return -1;
        break;
    case TOK_VAR:
    case TOK_LET:
    case TOK_CONST:
        return js_parse_var(s, TRUE, tok, TRUE);
    default:
        return js_parse_error(s, "invalid export syntax");
    }
    return js_parse_expect_semi(s);
}

static int add_closure_var(JSContext *ctx, JSFunctionDef *s,
                           BOOL is_local, BOOL is_arg,
                           int var_idx, JSAtom var_name,
                           BOOL is_const, BOOL is_lexical,
                           JSVarKindEnum var_kind);

static int add_import(JSParseState *s, JSModuleDef *m,
                      JSAtom local_name, JSAtom import_name)
{
    JSContext *ctx = s->ctx;
    int i, var_idx;
    JSImportEntry *mi;
    BOOL is_local;

    if (local_name == JS_ATOM_arguments || local_name == JS_ATOM_eval)
        return js_parse_error(s, "invalid import binding");

    if (local_name != JS_ATOM_default) {
        for (i = 0; i < s->cur_func->closure_var_count; i++) {
            if (s->cur_func->closure_var[i].var_name == local_name)
                return js_parse_error(s, "duplicate import binding");
        }
    }

    is_local = (import_name == JS_ATOM__star_);
    var_idx = add_closure_var(ctx, s->cur_func, is_local, FALSE,
                              m->import_entries_count,
                              local_name, TRUE, TRUE, JS_VAR_NORMAL);
    if (var_idx < 0)
        return -1;
    if (js_resize_array(ctx, (void **)&m->import_entries,
                        sizeof(JSImportEntry),
                        &m->import_entries_size,
                        m->import_entries_count + 1))
        return -1;
    mi = &m->import_entries[m->import_entries_count++];
    mi->import_name = JS_DupAtom(ctx, import_name);
    mi->var_idx = var_idx;
    return 0;
}

[[nodiscard]] static int js_parse_import(JSParseState *s)
{
    JSContext *ctx = s->ctx;
    JSModuleDef *m = s->cur_func->module;
    JSAtom local_name, import_name, module_name;
    int first_import, i, idx;

    if (next_token(s))
        return -1;

    first_import = m->import_entries_count;
    if (s->token.val == TOK_STRING) {
        module_name = JS_ValueToAtom(ctx, s->token.u.str.str);
        if (module_name == JS_ATOM_NULL)
            return -1;
        if (next_token(s)) {
            JS_FreeAtom(ctx, module_name);
            return -1;
        }
    } else {
        if (s->token.val == TOK_IDENT) {
            if (s->token.u.ident.is_reserved) {
                return js_parse_error_reserved_identifier(s);
            }
            /* "default" import */
            local_name = JS_DupAtom(ctx, s->token.u.ident.atom);
            import_name = JS_ATOM_default;
            if (next_token(s))
                goto fail;
            if (add_import(s, m, local_name, import_name))
                goto fail;
            JS_FreeAtom(ctx, local_name);

            if (s->token.val != ',')
                goto end_import_clause;
            if (next_token(s))
                return -1;
        }

        if (s->token.val == '*') {
            /* name space import */
            if (next_token(s))
                return -1;
            if (!token_is_pseudo_keyword(s, JS_ATOM_as))
                return js_parse_error(s, "expecting 'as'");
            if (next_token(s))
                return -1;
            if (!token_is_ident(s->token.val)) {
                js_parse_error(s, "identifier expected");
                return -1;
            }
            local_name = JS_DupAtom(ctx, s->token.u.ident.atom);
            import_name = JS_ATOM__star_;
            if (next_token(s))
                goto fail;
            if (add_import(s, m, local_name, import_name))
                goto fail;
            JS_FreeAtom(ctx, local_name);
        } else if (s->token.val == '{') {
            if (next_token(s))
                return -1;

            while (s->token.val != '}') {
                if (!token_is_ident(s->token.val)) {
                    js_parse_error(s, "identifier expected");
                    return -1;
                }
                import_name = JS_DupAtom(ctx, s->token.u.ident.atom);
                local_name = JS_ATOM_NULL;
                if (next_token(s))
                    goto fail;
                if (token_is_pseudo_keyword(s, JS_ATOM_as)) {
                    if (next_token(s))
                        goto fail;
                    if (!token_is_ident(s->token.val)) {
                        js_parse_error(s, "identifier expected");
                        goto fail;
                    }
                    local_name = JS_DupAtom(ctx, s->token.u.ident.atom);
                    if (next_token(s)) {
                    fail:
                        JS_FreeAtom(ctx, local_name);
                        JS_FreeAtom(ctx, import_name);
                        return -1;
                    }
                } else {
                    local_name = JS_DupAtom(ctx, import_name);
                }
                if (add_import(s, m, local_name, import_name))
                    goto fail;
                JS_FreeAtom(ctx, local_name);
                JS_FreeAtom(ctx, import_name);
                if (s->token.val != ',')
                    break;
                if (next_token(s))
                    return -1;
            }
            if (js_parse_expect(s, '}'))
                return -1;
        }
    end_import_clause:
        module_name = js_parse_from_clause(s);
        if (module_name == JS_ATOM_NULL)
            return -1;
    }
    idx = add_req_module_entry(ctx, m, module_name);
    JS_FreeAtom(ctx, module_name);
    if (idx < 0)
        return -1;
    for(i = first_import; i < m->import_entries_count; i++)
        m->import_entries[i].req_module_idx = idx;

    return js_parse_expect_semi(s);
}

[[nodiscard]] static int js_parse_source_element(JSParseState *s)
{
    JSFunctionDef *fd = s->cur_func;
    int tok;

    if (s->token.val == TOK_FUNCTION ||
        (token_is_pseudo_keyword(s, JS_ATOM_async) &&
         peek_token(s, TRUE) == TOK_FUNCTION)) {
        if (js_parse_function_decl(s, JS_PARSE_FUNC_STATEMENT,
                                   JS_FUNC_NORMAL, JS_ATOM_NULL,
                                   s->token.ptr, s->token.line_num))
            return -1;
    } else if (s->token.val == TOK_EXPORT && fd->module) {
        if (js_parse_export(s))
            return -1;
    } else if (s->token.val == TOK_IMPORT && fd->module &&
               ((tok = peek_token(s, FALSE)) != '(' && tok != '.'))  {
        /* the peek_token is needed to avoid confusion with ImportCall
           (dynamic import) or import.meta */
        if (js_parse_import(s))
            return -1;
    } else {
        if (js_parse_statement_or_decl(s, DECL_MASK_ALL))
            return -1;
    }
    return 0;
}

static JSFunctionDef *js_new_function_def(JSContext *ctx,
                                          JSFunctionDef *parent,
                                          BOOL is_eval,
                                          BOOL is_func_expr,
                                          const char *filename, int line_num)
{
    JSFunctionDef *fd;

    fd = (JSFunctionDef*) js_mallocz(ctx, sizeof(*fd));
    if (!fd)
        return NULL;

    fd->ctx = ctx;
    init_list_head(&fd->child_list);

    /* insert in parent list */
    fd->parent = parent;
    fd->parent_cpool_idx = -1;
    if (parent) {
        list_add_tail(&fd->link, &parent->child_list);
        fd->js_mode = parent->js_mode;
        fd->parent_scope_level = parent->scope_level;
    }

    fd->is_eval = is_eval;
    fd->is_func_expr = is_func_expr;
    js_dbuf_init(ctx, &fd->byte_code);
    fd->last_opcode_pos = -1;
    fd->func_name = JS_ATOM_NULL;
    fd->var_object_idx = -1;
    fd->arg_var_object_idx = -1;
    fd->arguments_var_idx = -1;
    fd->arguments_arg_idx = -1;
    fd->func_var_idx = -1;
    fd->eval_ret_idx = -1;
    fd->this_var_idx = -1;
    fd->new_target_var_idx = -1;
    fd->this_active_func_var_idx = -1;
    fd->home_object_var_idx = -1;

    /* XXX: should distinguish arg, var and var object and body scopes */
    fd->scopes = fd->def_scope_array;
    fd->scope_size = countof(fd->def_scope_array);
    fd->scope_count = 1;
    fd->scopes[0].first = -1;
    fd->scopes[0].parent = -1;
    fd->scope_level = 0;  /* 0: var/arg scope */
    fd->scope_first = -1;
    fd->body_scope = -1;

    fd->filename = JS_NewAtom(ctx, filename);
    fd->line_num = line_num;

    js_dbuf_init(ctx, &fd->pc2line);
    //fd->pc2line_last_line_num = line_num;
    //fd->pc2line_last_pc = 0;
    fd->last_opcode_line_num = line_num;

    return fd;
}

static void free_bytecode_atoms(JSRuntime *rt,
                                const uint8_t *bc_buf, int bc_len,
                                BOOL use_short_opcodes)
{
    int pos, len, op;
    JSAtom atom;
    const JSOpCode *oi;

    pos = 0;
    while (pos < bc_len) {
        op = bc_buf[pos];
        if (use_short_opcodes)
            oi = &short_opcode_info(op);
        else
            oi = &opcode_info[op];

        len = oi->size;
        switch(oi->fmt) {
        case OP_FMT_atom:
        case OP_FMT_atom_u8:
        case OP_FMT_atom_u16:
        case OP_FMT_atom_label_u8:
        case OP_FMT_atom_label_u16:
            atom = get_u32(bc_buf + pos + 1);
            JS_FreeAtomRT(rt, atom);
            break;
        default:
            break;
        }
        pos += len;
    }
}

static void js_free_function_def(JSContext *ctx, JSFunctionDef *fd)
{
    int i;
    struct list_head *el, *el1;

    /* free the child functions */
    list_for_each_safe(el, el1, &fd->child_list) {
        JSFunctionDef *fd1;
        fd1 = list_entry(el, JSFunctionDef, link);
        js_free_function_def(ctx, fd1);
    }

    free_bytecode_atoms(ctx->rt, fd->byte_code.buf, fd->byte_code.size,
                        fd->use_short_opcodes);
    dbuf_free(&fd->byte_code);
    js_free(ctx, fd->jump_slots);
    js_free(ctx, fd->label_slots);
    js_free(ctx, fd->line_number_slots);

    for(i = 0; i < fd->cpool_count; i++) {
        JS_FreeValue(ctx, fd->cpool[i]);
    }
    js_free(ctx, fd->cpool);

    JS_FreeAtom(ctx, fd->func_name);

    for(i = 0; i < fd->var_count; i++) {
        JS_FreeAtom(ctx, fd->vars[i].var_name);
    }
    js_free(ctx, fd->vars);
    for(i = 0; i < fd->arg_count; i++) {
        JS_FreeAtom(ctx, fd->args[i].var_name);
    }
    js_free(ctx, fd->args);

    for(i = 0; i < fd->global_var_count; i++) {
        JS_FreeAtom(ctx, fd->global_vars[i].var_name);
    }
    js_free(ctx, fd->global_vars);

    for(i = 0; i < fd->closure_var_count; i++) {
        JSClosureVar *cv = &fd->closure_var[i];
        JS_FreeAtom(ctx, cv->var_name);
    }
    js_free(ctx, fd->closure_var);

    if (fd->scopes != fd->def_scope_array)
        js_free(ctx, fd->scopes);

    JS_FreeAtom(ctx, fd->filename);
    dbuf_free(&fd->pc2line);

    js_free(ctx, fd->source);

    if (fd->parent) {
        /* remove in parent list */
        list_del(&fd->link);
    }
    js_free(ctx, fd);
}

#ifdef DUMP_BYTECODE
static const char *skip_lines(const char *p, int n) {
    while (n-- > 0 && *p) {
        while (*p && *p++ != '\n')
            continue;
    }
    return p;
}

static void print_lines(const char *source, int line, int line1) {
    const char *s = source;
    const char *p = skip_lines(s, line);
    if (*p) {
        while (line++ < line1) {
            p = skip_lines(s = p, 1);
            printf(";; %.*s", (int)(p - s), s);
            if (!*p) {
                if (p[-1] != '\n')
                    printf("\n");
                break;
            }
        }
    }
}

static void dump_byte_code(JSContext *ctx, int pass,
                           const uint8_t *tab, int len,
                           const JSVarDef *args, int arg_count,
                           const JSVarDef *vars, int var_count,
                           const JSClosureVar *closure_var, int closure_var_count,
                           const JSValue *cpool, uint32_t cpool_count,
                           const char *source, int line_num,
                           const LabelSlot *label_slots, JSFunctionBytecode *b)
{
    const JSOpCode *oi;
    int pos, pos_next, op, size, idx, addr, line, line1, in_source;
    uint8_t *bits = js_mallocz(ctx, len * sizeof(*bits));
    BOOL use_short_opcodes = (b != NULL);

    /* scan for jump targets */
    for (pos = 0; pos < len; pos = pos_next) {
        op = tab[pos];
        if (use_short_opcodes)
            oi = &short_opcode_info(op);
        else
            oi = &opcode_info[op];
        pos_next = pos + oi->size;
        if (op < OP_COUNT) {
            switch (oi->fmt) {
#if SHORT_OPCODES
            case OP_FMT_label8:
                pos++;
                addr = (int8_t)tab[pos];
                goto has_addr;
            case OP_FMT_label16:
                pos++;
                addr = (int16_t)get_u16(tab + pos);
                goto has_addr;
#endif
            case OP_FMT_atom_label_u8:
            case OP_FMT_atom_label_u16:
                pos += 4;
                /* fall thru */
            case OP_FMT_label:
            case OP_FMT_label_u16:
                pos++;
                addr = get_u32(tab + pos);
                goto has_addr;
            has_addr:
                if (pass == 1)
                    addr = label_slots[addr].pos;
                if (pass == 2)
                    addr = label_slots[addr].pos2;
                if (pass == 3)
                    addr += pos;
                if (addr >= 0 && addr < len)
                    bits[addr] |= 1;
                break;
            }
        }
    }
    in_source = 0;
    if (source) {
        /* Always print first line: needed if single line */
        print_lines(source, 0, 1);
        in_source = 1;
    }
    line1 = line = 1;
    pos = 0;
    while (pos < len) {
        op = tab[pos];
        if (source) {
            if (b) {
                line1 = find_line_num(ctx, b, pos) - line_num + 1;
            } else if (op == OP_line_num) {
                line1 = get_u32(tab + pos + 1) - line_num + 1;
            }
            if (line1 > line) {
                if (!in_source)
                    printf("\n");
                in_source = 1;
                print_lines(source, line, line1);
                line = line1;
                //bits[pos] |= 2;
            }
        }
        if (in_source)
            printf("\n");
        in_source = 0;
        if (op >= OP_COUNT) {
            printf("invalid opcode (0x%02x)\n", op);
            pos++;
            continue;
        }
        if (use_short_opcodes)
            oi = &short_opcode_info(op);
        else
            oi = &opcode_info[op];
        size = oi->size;
        if (pos + size > len) {
            printf("truncated opcode (0x%02x)\n", op);
            break;
        }
#if defined(DUMP_BYTECODE) && (DUMP_BYTECODE & 16)
        {
            int i, x, x0;
            x = x0 = printf("%5d ", pos);
            for (i = 0; i < size; i++) {
                if (i == 6) {
                    printf("\n%*s", x = x0, "");
                }
                x += printf(" %02X", tab[pos + i]);
            }
            printf("%*s", x0 + 20 - x, "");
        }
#endif
        if (bits[pos]) {
            printf("%5d:  ", pos);
        } else {
            printf("        ");
        }
        printf("%s", oi->name);
        pos++;
        switch(oi->fmt) {
        case OP_FMT_none_int:
            printf(" %d", op - OP_push_0);
            break;
        case OP_FMT_npopx:
            printf(" %d", op - OP_call0);
            break;
        case OP_FMT_u8:
            printf(" %u", get_u8(tab + pos));
            break;
        case OP_FMT_i8:
            printf(" %d", get_i8(tab + pos));
            break;
        case OP_FMT_u16:
        case OP_FMT_npop:
            printf(" %u", get_u16(tab + pos));
            break;
        case OP_FMT_npop_u16:
            printf(" %u,%u", get_u16(tab + pos), get_u16(tab + pos + 2));
            break;
        case OP_FMT_i16:
            printf(" %d", get_i16(tab + pos));
            break;
        case OP_FMT_i32:
            printf(" %d", get_i32(tab + pos));
            break;
        case OP_FMT_u32:
            printf(" %u", get_u32(tab + pos));
            break;
#if SHORT_OPCODES
        case OP_FMT_label8:
            addr = get_i8(tab + pos);
            goto has_addr1;
        case OP_FMT_label16:
            addr = get_i16(tab + pos);
            goto has_addr1;
#endif
        case OP_FMT_label:
            addr = get_u32(tab + pos);
            goto has_addr1;
        has_addr1:
            if (pass == 1)
                printf(" %u:%u", addr, label_slots[addr].pos);
            if (pass == 2)
                printf(" %u:%u", addr, label_slots[addr].pos2);
            if (pass == 3)
                printf(" %u", addr + pos);
            break;
        case OP_FMT_label_u16:
            addr = get_u32(tab + pos);
            if (pass == 1)
                printf(" %u:%u", addr, label_slots[addr].pos);
            if (pass == 2)
                printf(" %u:%u", addr, label_slots[addr].pos2);
            if (pass == 3)
                printf(" %u", addr + pos);
            printf(",%u", get_u16(tab + pos + 4));
            break;
#if SHORT_OPCODES
        case OP_FMT_const8:
            idx = get_u8(tab + pos);
            goto has_pool_idx;
#endif
        case OP_FMT_const:
            idx = get_u32(tab + pos);
            goto has_pool_idx;
        has_pool_idx:
            printf(" %u: ", idx);
            if (idx < cpool_count) {
                JS_DumpValue(ctx, cpool[idx]);
            }
            break;
        case OP_FMT_atom:
            printf(" ");
            print_atom(ctx, get_u32(tab + pos));
            break;
        case OP_FMT_atom_u8:
            printf(" ");
            print_atom(ctx, get_u32(tab + pos));
            printf(",%d", get_u8(tab + pos + 4));
            break;
        case OP_FMT_atom_u16:
            printf(" ");
            print_atom(ctx, get_u32(tab + pos));
            printf(",%d", get_u16(tab + pos + 4));
            break;
        case OP_FMT_atom_label_u8:
        case OP_FMT_atom_label_u16:
            printf(" ");
            print_atom(ctx, get_u32(tab + pos));
            addr = get_u32(tab + pos + 4);
            if (pass == 1)
                printf(",%u:%u", addr, label_slots[addr].pos);
            if (pass == 2)
                printf(",%u:%u", addr, label_slots[addr].pos2);
            if (pass == 3)
                printf(",%u", addr + pos + 4);
            if (oi->fmt == OP_FMT_atom_label_u8)
                printf(",%u", get_u8(tab + pos + 8));
            else
                printf(",%u", get_u16(tab + pos + 8));
            break;
        case OP_FMT_none_loc:
            idx = (op - OP_get_loc0) % 4;
            goto has_loc;
        case OP_FMT_loc8:
            idx = get_u8(tab + pos);
            goto has_loc;
        case OP_FMT_loc:
            idx = get_u16(tab + pos);
        has_loc:
            printf(" %d: ", idx);
            if (idx < var_count) {
                print_atom(ctx, vars[idx].var_name);
            }
            break;
        case OP_FMT_none_arg:
            idx = (op - OP_get_arg0) % 4;
            goto has_arg;
        case OP_FMT_arg:
            idx = get_u16(tab + pos);
        has_arg:
            printf(" %d: ", idx);
            if (idx < arg_count) {
                print_atom(ctx, args[idx].var_name);
            }
            break;
        case OP_FMT_none_var_ref:
            idx = (op - OP_get_var_ref0) % 4;
            goto has_var_ref;
        case OP_FMT_var_ref:
            idx = get_u16(tab + pos);
        has_var_ref:
            printf(" %d: ", idx);
            if (idx < closure_var_count) {
                print_atom(ctx, closure_var[idx].var_name);
            }
            break;
        default:
            break;
        }
        printf("\n");
        pos += oi->size - 1;
    }
    if (source) {
        if (!in_source)
            printf("\n");
        print_lines(source, line, INT32_MAX);
    }
    js_free(ctx, bits);
}

static void dump_pc2line(JSContext *ctx, const uint8_t *buf, int len, int line_num)
{
    const uint8_t *p_end, *p_next, *p;
    int pc, v;
    unsigned int op;

    if (len <= 0)
        return;

    printf("%5s %5s\n", "PC", "LINE");

    p = buf;
    p_end = buf + len;
    pc = 0;
    while (p < p_end) {
        op = *p++;
        if (op == 0) {
            v = unicode_from_utf8(p, p_end - p, &p_next);
            if (v < 0)
                goto fail;
            pc += v;
            p = p_next;
            v = unicode_from_utf8(p, p_end - p, &p_next);
            if (v < 0) {
            fail:
                printf("invalid pc2line encode pos=%d\n", (int)(p - buf));
                return;
            }
            if (!(v & 1)) {
                v = v >> 1;
            } else {
                v = -(v >> 1) - 1;
            }
            line_num += v;
            p = p_next;
        } else {
            op -= PC2LINE_OP_FIRST;
            pc += (op / PC2LINE_RANGE);
            line_num += (op % PC2LINE_RANGE) + PC2LINE_BASE;
        }
        printf("%5d %5d\n", pc, line_num);
    }
}

static void js_dump_function_bytecode(JSContext *ctx, JSFunctionBytecode *b)
{
    int i;
    char atom_buf[ATOM_GET_STR_BUF_SIZE];
    const char *str;

    if (b->has_debug && b->debug.filename != JS_ATOM_NULL) {
        str = JS_AtomGetStr(ctx, atom_buf, sizeof(atom_buf), b->debug.filename);
        printf("%s:%d: ", str, b->debug.line_num);
    }

    str = JS_AtomGetStr(ctx, atom_buf, sizeof(atom_buf), b->func_name);
    printf("function: %s%s\n", &"*"[b->func_kind != JS_FUNC_GENERATOR], str);
    if (b->js_mode) {
        printf("  mode:");
        if (b->js_mode & JS_MODE_STRICT)
            printf(" strict");
#ifdef CONFIG_BIGNUM
        if (b->js_mode & JS_MODE_MATH)
            printf(" math");
#endif
        printf("\n");
    }
    if (b->arg_count && b->vardefs) {
        printf("  args:");
        for(i = 0; i < b->arg_count; i++) {
            printf(" %s", JS_AtomGetStr(ctx, atom_buf, sizeof(atom_buf),
                                        b->vardefs[i].var_name));
        }
        printf("\n");
    }
    if (b->var_count && b->vardefs) {
        printf("  locals:\n");
        for(i = 0; i < b->var_count; i++) {
            JSVarDef *vd = &b->vardefs[b->arg_count + i];
            printf("%5d: %s %s", i,
                   vd->var_kind == JS_VAR_CATCH ? "catch" :
                   (vd->var_kind == JS_VAR_FUNCTION_DECL ||
                    vd->var_kind == JS_VAR_NEW_FUNCTION_DECL) ? "function" :
                   vd->is_const ? "const" :
                   vd->is_lexical ? "let" : "var",
                   JS_AtomGetStr(ctx, atom_buf, sizeof(atom_buf), vd->var_name));
            if (vd->scope_level)
                printf(" [level:%d next:%d]", vd->scope_level, vd->scope_next);
            printf("\n");
        }
    }
    if (b->closure_var_count) {
        printf("  closure vars:\n");
        for(i = 0; i < b->closure_var_count; i++) {
            JSClosureVar *cv = &b->closure_var[i];
            printf("%5d: %s %s:%s%d %s\n", i,
                   JS_AtomGetStr(ctx, atom_buf, sizeof(atom_buf), cv->var_name),
                   cv->is_local ? "local" : "parent",
                   cv->is_arg ? "arg" : "loc", cv->var_idx,
                   cv->is_const ? "const" :
                   cv->is_lexical ? "let" : "var");
        }
    }
    printf("  stack_size: %d\n", b->stack_size);
    printf("  opcodes:\n");
    dump_byte_code(ctx, 3, b->byte_code_buf, b->byte_code_len,
                   b->vardefs, b->arg_count,
                   b->vardefs ? b->vardefs + b->arg_count : NULL, b->var_count,
                   b->closure_var, b->closure_var_count,
                   b->cpool, b->cpool_count,
                   b->has_debug ? b->debug.source : NULL,
                   b->has_debug ? b->debug.line_num : -1, NULL, b);
#if defined(DUMP_BYTECODE) && (DUMP_BYTECODE & 32)
    if (b->has_debug)
        dump_pc2line(ctx, b->debug.pc2line_buf, b->debug.pc2line_len, b->debug.line_num);
#endif
    printf("\n");
}
#endif

static int add_closure_var(JSContext *ctx, JSFunctionDef *s,
                           BOOL is_local, BOOL is_arg,
                           int var_idx, JSAtom var_name,
                           BOOL is_const, BOOL is_lexical,
                           JSVarKindEnum var_kind)
{
    JSClosureVar *cv;

    /* the closure variable indexes are currently stored on 16 bits */
    if (s->closure_var_count >= JS_MAX_LOCAL_VARS) {
        JS_ThrowInternalError(ctx, "too many closure variables");
        return -1;
    }

    if (js_resize_array(ctx, (void **)&s->closure_var,
                        sizeof(s->closure_var[0]),
                        &s->closure_var_size, s->closure_var_count + 1))
        return -1;
    cv = &s->closure_var[s->closure_var_count++];
    cv->is_local = is_local;
    cv->is_arg = is_arg;
    cv->is_const = is_const;
    cv->is_lexical = is_lexical;
    cv->var_kind = var_kind;
    cv->var_idx = var_idx;
    cv->var_name = JS_DupAtom(ctx, var_name);
    return s->closure_var_count - 1;
}

static int find_closure_var(JSContext *ctx, JSFunctionDef *s,
                            JSAtom var_name)
{
    int i;
    for(i = 0; i < s->closure_var_count; i++) {
        JSClosureVar *cv = &s->closure_var[i];
        if (cv->var_name == var_name)
            return i;
    }
    return -1;
}

/* 'fd' must be a parent of 's'. Create in 's' a closure referencing a
   local variable (is_local = TRUE) or a closure (is_local = FALSE) in
   'fd' */
static int get_closure_var2(JSContext *ctx, JSFunctionDef *s,
                            JSFunctionDef *fd, BOOL is_local,
                            BOOL is_arg, int var_idx, JSAtom var_name,
                            BOOL is_const, BOOL is_lexical,
                            JSVarKindEnum var_kind)
{
    int i;

    if (fd != s->parent) {
        var_idx = get_closure_var2(ctx, s->parent, fd, is_local,
                                   is_arg, var_idx, var_name,
                                   is_const, is_lexical, var_kind);
        if (var_idx < 0)
            return -1;
        is_local = FALSE;
    }
    for(i = 0; i < s->closure_var_count; i++) {
        JSClosureVar *cv = &s->closure_var[i];
        if (cv->var_idx == var_idx && cv->is_arg == is_arg &&
            cv->is_local == is_local)
            return i;
    }
    return add_closure_var(ctx, s, is_local, is_arg, var_idx, var_name,
                           is_const, is_lexical, var_kind);
}

static int get_closure_var(JSContext *ctx, JSFunctionDef *s,
                           JSFunctionDef *fd, BOOL is_arg,
                           int var_idx, JSAtom var_name,
                           BOOL is_const, BOOL is_lexical,
                           JSVarKindEnum var_kind)
{
    return get_closure_var2(ctx, s, fd, TRUE, is_arg,
                            var_idx, var_name, is_const, is_lexical,
                            var_kind);
}

static int get_with_scope_opcode(int op)
{
    if (op == OP_scope_get_var_undef)
        return OP_with_get_var;
    else
        return OP_with_get_var + (op - OP_scope_get_var);
}

static BOOL can_opt_put_ref_value(const uint8_t *bc_buf, int pos)
{
    int opcode = bc_buf[pos];
    return (bc_buf[pos + 1] == OP_put_ref_value &&
            (opcode == OP_insert3 ||
             opcode == OP_perm4 ||
             opcode == OP_nop ||
             opcode == OP_rot3l));
}

static BOOL can_opt_put_global_ref_value(const uint8_t *bc_buf, int pos)
{
    int opcode = bc_buf[pos];
    return (bc_buf[pos + 1] == OP_put_ref_value &&
            (opcode == OP_insert3 ||
             opcode == OP_perm4 ||
             opcode == OP_nop ||
             opcode == OP_rot3l));
}

static int optimize_scope_make_ref(JSContext *ctx, JSFunctionDef *s,
                                   DynBuf *bc, uint8_t *bc_buf,
                                   LabelSlot *ls, int pos_next,
                                   int get_op, int var_idx)
{
    int label_pos, end_pos, pos;

    /* XXX: should optimize `loc(a) += expr` as `expr add_loc(a)`
       but only if expr does not modify `a`.
       should scan the code between pos_next and label_pos
       for operations that can potentially change `a`:
       OP_scope_make_ref(a), function calls, jumps and gosub.
     */
    /* replace the reference get/put with normal variable
       accesses */
    if (bc_buf[pos_next] == OP_get_ref_value) {
        dbuf_putc(bc, get_op);
        dbuf_put_u16(bc, var_idx);
        pos_next++;
    }
    /* remove the OP_label to make room for replacement */
    /* label should have a refcount of 0 anyway */
    /* XXX: should avoid this patch by inserting nops in phase 1 */
    label_pos = ls->pos;
    pos = label_pos - 5;
    assert(bc_buf[pos] == OP_label);
    /* label points to an instruction pair:
       - insert3 / put_ref_value
       - perm4 / put_ref_value
       - rot3l / put_ref_value
       - nop / put_ref_value
     */
    end_pos = label_pos + 2;
    if (bc_buf[label_pos] == OP_insert3)
        bc_buf[pos++] = OP_dup;
    bc_buf[pos] = get_op + 1;
    put_u16(bc_buf + pos + 1, var_idx);
    pos += 3;
    /* pad with OP_nop */
    while (pos < end_pos)
        bc_buf[pos++] = OP_nop;
    return pos_next;
}

static int optimize_scope_make_global_ref(JSContext *ctx, JSFunctionDef *s,
                                          DynBuf *bc, uint8_t *bc_buf,
                                          LabelSlot *ls, int pos_next,
                                          JSAtom var_name)
{
    int label_pos, end_pos, pos, op;
    BOOL is_strict;
    is_strict = ((s->js_mode & JS_MODE_STRICT) != 0);

    /* replace the reference get/put with normal variable
       accesses */
    if (is_strict) {
        /* need to check if the variable exists before evaluating the right
           expression */
        /* XXX: need an extra OP_true if destructuring an array */
        dbuf_putc(bc, OP_check_var);
        dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
    } else {
        /* XXX: need 2 extra OP_true if destructuring an array */
    }
    if (bc_buf[pos_next] == OP_get_ref_value) {
        dbuf_putc(bc, OP_get_var);
        dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
        pos_next++;
    }
    /* remove the OP_label to make room for replacement */
    /* label should have a refcount of 0 anyway */
    /* XXX: should have emitted several OP_nop to avoid this kludge */
    label_pos = ls->pos;
    pos = label_pos - 5;
    assert(bc_buf[pos] == OP_label);
    end_pos = label_pos + 2;
    op = bc_buf[label_pos];
    if (is_strict) {
        if (op != OP_nop) {
            switch(op) {
            case OP_insert3:
                op = OP_insert2;
                break;
            case OP_perm4:
                op = OP_perm3;
                break;
            case OP_rot3l:
                op = OP_swap;
                break;
            default:
                abort();
            }
            bc_buf[pos++] = op;
        }
    } else {
        if (op == OP_insert3)
            bc_buf[pos++] = OP_dup;
    }
    if (is_strict) {
        bc_buf[pos] = OP_put_var_strict;
        /* XXX: need 1 extra OP_drop if destructuring an array */
    } else {
        bc_buf[pos] = OP_put_var;
        /* XXX: need 2 extra OP_drop if destructuring an array */
    }
    put_u32(bc_buf + pos + 1, JS_DupAtom(ctx, var_name));
    pos += 5;
    /* pad with OP_nop */
    while (pos < end_pos)
        bc_buf[pos++] = OP_nop;
    return pos_next;
}

static int add_var_this(JSContext *ctx, JSFunctionDef *fd)
{
    int idx;
    idx = add_var(ctx, fd, JS_ATOM_this);
    if (idx >= 0 && fd->is_derived_class_constructor) {
        JSVarDef *vd = &fd->vars[idx];
        /* XXX: should have is_this flag or var type */
        vd->is_lexical = 1; /* used to trigger 'uninitialized' checks
                               in a derived class constructor */
    }
    return idx;
}

static int resolve_pseudo_var(JSContext *ctx, JSFunctionDef *s,
                               JSAtom var_name)
{
    int var_idx;

    if (!s->has_this_binding)
        return -1;
    switch(var_name) {
    case JS_ATOM_home_object:
        /* 'home_object' pseudo variable */
        if (s->home_object_var_idx < 0)
            s->home_object_var_idx = add_var(ctx, s, var_name);
        var_idx = s->home_object_var_idx;
        break;
    case JS_ATOM_this_active_func:
        /* 'this.active_func' pseudo variable */
        if (s->this_active_func_var_idx < 0)
            s->this_active_func_var_idx = add_var(ctx, s, var_name);
        var_idx = s->this_active_func_var_idx;
        break;
    case JS_ATOM_new_target:
        /* 'new.target' pseudo variable */
        if (s->new_target_var_idx < 0)
            s->new_target_var_idx = add_var(ctx, s, var_name);
        var_idx = s->new_target_var_idx;
        break;
    case JS_ATOM_this:
        /* 'this' pseudo variable */
        if (s->this_var_idx < 0)
            s->this_var_idx = add_var_this(ctx, s);
        var_idx = s->this_var_idx;
        break;
    default:
        var_idx = -1;
        break;
    }
    return var_idx;
}

/* test if 'var_name' is in the variable object on the stack. If is it
   the case, handle it and jump to 'label_done' */
static void var_object_test(JSContext *ctx, JSFunctionDef *s,
                            JSAtom var_name, int op, DynBuf *bc,
                            int *plabel_done, BOOL is_with)
{
    dbuf_putc(bc, get_with_scope_opcode(op));
    dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
    *plabel_done = new_label_fd(s, *plabel_done);
    dbuf_put_u32(bc, *plabel_done);
    dbuf_putc(bc, is_with);
    update_label(s, *plabel_done, 1);
    s->jump_size++;
}

/* return the position of the next opcode */
static int resolve_scope_var(JSContext *ctx, JSFunctionDef *s,
                             JSAtom var_name, int scope_level, int op,
                             DynBuf *bc, uint8_t *bc_buf,
                             LabelSlot *ls, int pos_next)
{
    int idx, var_idx, is_put;
    int label_done;
    JSFunctionDef *fd;
    JSVarDef *vd;
    BOOL is_pseudo_var, is_arg_scope;

    label_done = -1;

    /* XXX: could be simpler to use a specific function to
       resolve the pseudo variables */
    is_pseudo_var = (var_name == JS_ATOM_home_object ||
                     var_name == JS_ATOM_this_active_func ||
                     var_name == JS_ATOM_new_target ||
                     var_name == JS_ATOM_this);

    /* resolve local scoped variables */
    var_idx = -1;
    for (idx = s->scopes[scope_level].first; idx >= 0;) {
        vd = &s->vars[idx];
        if (vd->var_name == var_name) {
            if (op == OP_scope_put_var || op == OP_scope_make_ref) {
                if (vd->is_const) {
                    dbuf_putc(bc, OP_throw_error);
                    dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
                    dbuf_putc(bc, JS_THROW_VAR_RO);
                    goto done;
                }
            }
            var_idx = idx;
            break;
        } else
        if (vd->var_name == JS_ATOM__with_ && !is_pseudo_var) {
            dbuf_putc(bc, OP_get_loc);
            dbuf_put_u16(bc, idx);
            var_object_test(ctx, s, var_name, op, bc, &label_done, 1);
        }
        idx = vd->scope_next;
    }
    is_arg_scope = (idx == ARG_SCOPE_END);
    if (var_idx < 0) {
        /* argument scope: variables are not visible but pseudo
           variables are visible */
        if (!is_arg_scope) {
            var_idx = find_var(ctx, s, var_name);
        }

        if (var_idx < 0 && is_pseudo_var)
            var_idx = resolve_pseudo_var(ctx, s, var_name);

        if (var_idx < 0 && var_name == JS_ATOM_arguments &&
            s->has_arguments_binding) {
            /* 'arguments' pseudo variable */
            var_idx = add_arguments_var(ctx, s);
        }
        if (var_idx < 0 && s->is_func_expr && var_name == s->func_name) {
            /* add a new variable with the function name */
            var_idx = add_func_var(ctx, s, var_name);
        }
    }
    if (var_idx >= 0) {
        if ((op == OP_scope_put_var || op == OP_scope_make_ref) &&
            !(var_idx & ARGUMENT_VAR_OFFSET) &&
            s->vars[var_idx].is_const) {
            /* only happens when assigning a function expression name
               in strict mode */
            dbuf_putc(bc, OP_throw_error);
            dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
            dbuf_putc(bc, JS_THROW_VAR_RO);
            goto done;
        }
        /* OP_scope_put_var_init is only used to initialize a
           lexical variable, so it is never used in a with or var object. It
           can be used with a closure (module global variable case). */
        switch (op) {
        case OP_scope_make_ref:
            if (!(var_idx & ARGUMENT_VAR_OFFSET) &&
                s->vars[var_idx].var_kind == JS_VAR_FUNCTION_NAME) {
                /* Create a dummy object reference for the func_var */
                dbuf_putc(bc, OP_object);
                dbuf_putc(bc, OP_get_loc);
                dbuf_put_u16(bc, var_idx);
                dbuf_putc(bc, OP_define_field);
                dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
                dbuf_putc(bc, OP_push_atom_value);
                dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
            } else
            if (label_done == -1 && can_opt_put_ref_value(bc_buf, ls->pos)) {
                int get_op;
                if (var_idx & ARGUMENT_VAR_OFFSET) {
                    get_op = OP_get_arg;
                    var_idx -= ARGUMENT_VAR_OFFSET;
                } else {
                    if (s->vars[var_idx].is_lexical)
                        get_op = OP_get_loc_check;
                    else
                        get_op = OP_get_loc;
                }
                pos_next = optimize_scope_make_ref(ctx, s, bc, bc_buf, ls,
                                                   pos_next, get_op, var_idx);
            } else {
                /* Create a dummy object with a named slot that is
                   a reference to the local variable */
                if (var_idx & ARGUMENT_VAR_OFFSET) {
                    dbuf_putc(bc, OP_make_arg_ref);
                    dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
                    dbuf_put_u16(bc, var_idx - ARGUMENT_VAR_OFFSET);
                } else {
                    dbuf_putc(bc, OP_make_loc_ref);
                    dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
                    dbuf_put_u16(bc, var_idx);
                }
            }
            break;
        case OP_scope_get_ref:
            dbuf_putc(bc, OP_undefined);
            /* fall thru */
        case OP_scope_get_var_undef:
        case OP_scope_get_var:
        case OP_scope_put_var:
        case OP_scope_put_var_init:
            is_put = (op == OP_scope_put_var || op == OP_scope_put_var_init);
            if (var_idx & ARGUMENT_VAR_OFFSET) {
                dbuf_putc(bc, OP_get_arg + is_put);
                dbuf_put_u16(bc, var_idx - ARGUMENT_VAR_OFFSET);
            } else {
                if (is_put) {
                    if (s->vars[var_idx].is_lexical) {
                        if (op == OP_scope_put_var_init) {
                            /* 'this' can only be initialized once */
                            if (var_name == JS_ATOM_this)
                                dbuf_putc(bc, OP_put_loc_check_init);
                            else
                                dbuf_putc(bc, OP_put_loc);
                        } else {
                            dbuf_putc(bc, OP_put_loc_check);
                        }
                    } else {
                        dbuf_putc(bc, OP_put_loc);
                    }
                } else {
                    if (s->vars[var_idx].is_lexical) {
                        dbuf_putc(bc, OP_get_loc_check);
                    } else {
                        dbuf_putc(bc, OP_get_loc);
                    }
                }
                dbuf_put_u16(bc, var_idx);
            }
            break;
        case OP_scope_delete_var:
            dbuf_putc(bc, OP_push_false);
            break;
        }
        goto done;
    }
    /* check eval object */
    if (!is_arg_scope && s->var_object_idx >= 0 && !is_pseudo_var) {
        dbuf_putc(bc, OP_get_loc);
        dbuf_put_u16(bc, s->var_object_idx);
        var_object_test(ctx, s, var_name, op, bc, &label_done, 0);
    }
    /* check eval object in argument scope */
    if (s->arg_var_object_idx >= 0 && !is_pseudo_var) {
        dbuf_putc(bc, OP_get_loc);
        dbuf_put_u16(bc, s->arg_var_object_idx);
        var_object_test(ctx, s, var_name, op, bc, &label_done, 0);
    }

    /* check parent scopes */
    for (fd = s; fd->parent;) {
        scope_level = fd->parent_scope_level;
        fd = fd->parent;
        for (idx = fd->scopes[scope_level].first; idx >= 0;) {
            vd = &fd->vars[idx];
            if (vd->var_name == var_name) {
                if (op == OP_scope_put_var || op == OP_scope_make_ref) {
                    if (vd->is_const) {
                        dbuf_putc(bc, OP_throw_error);
                        dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
                        dbuf_putc(bc, JS_THROW_VAR_RO);
                        goto done;
                    }
                }
                var_idx = idx;
                break;
            } else if (vd->var_name == JS_ATOM__with_ && !is_pseudo_var) {
                vd->is_captured = 1;
                idx = get_closure_var(ctx, s, fd, FALSE, idx, vd->var_name, FALSE, FALSE, JS_VAR_NORMAL);
                if (idx >= 0) {
                    dbuf_putc(bc, OP_get_var_ref);
                    dbuf_put_u16(bc, idx);
                    var_object_test(ctx, s, var_name, op, bc, &label_done, 1);
                }
            }
            idx = vd->scope_next;
        }
        is_arg_scope = (idx == ARG_SCOPE_END);
        if (var_idx >= 0)
            break;

        if (!is_arg_scope) {
            var_idx = find_var(ctx, fd, var_name);
            if (var_idx >= 0)
                break;
        }
        if (is_pseudo_var) {
            var_idx = resolve_pseudo_var(ctx, fd, var_name);
            if (var_idx >= 0)
                break;
        }
        if (var_name == JS_ATOM_arguments && fd->has_arguments_binding) {
            var_idx = add_arguments_var(ctx, fd);
            break;
        }
        if (fd->is_func_expr && fd->func_name == var_name) {
            /* add a new variable with the function name */
            var_idx = add_func_var(ctx, fd, var_name);
            break;
        }

        /* check eval object */
        if (!is_arg_scope && fd->var_object_idx >= 0 && !is_pseudo_var) {
            vd = &fd->vars[fd->var_object_idx];
            vd->is_captured = 1;
            idx = get_closure_var(ctx, s, fd, FALSE,
                                  fd->var_object_idx, vd->var_name,
                                  FALSE, FALSE, JS_VAR_NORMAL);
            dbuf_putc(bc, OP_get_var_ref);
            dbuf_put_u16(bc, idx);
            var_object_test(ctx, s, var_name, op, bc, &label_done, 0);
        }

        /* check eval object in argument scope */
        if (fd->arg_var_object_idx >= 0 && !is_pseudo_var) {
            vd = &fd->vars[fd->arg_var_object_idx];
            vd->is_captured = 1;
            idx = get_closure_var(ctx, s, fd, FALSE,
                                  fd->arg_var_object_idx, vd->var_name,
                                  FALSE, FALSE, JS_VAR_NORMAL);
            dbuf_putc(bc, OP_get_var_ref);
            dbuf_put_u16(bc, idx);
            var_object_test(ctx, s, var_name, op, bc, &label_done, 0);
        }

        if (fd->is_eval)
            break; /* it it necessarily the top level function */
    }

    /* check direct eval scope (in the closure of the eval function
       which is necessarily at the top level) */
    if (!fd)
        fd = s;
    if (var_idx < 0 && fd->is_eval) {
        int idx1;
        for (idx1 = 0; idx1 < fd->closure_var_count; idx1++) {
            JSClosureVar *cv = &fd->closure_var[idx1];
            if (var_name == cv->var_name) {
                if (fd != s) {
                    idx = get_closure_var2(ctx, s, fd,
                                           FALSE,
                                           cv->is_arg, idx1,
                                           cv->var_name, cv->is_const,
                                           cv->is_lexical, (JSVarKindEnum) cv->var_kind);
                } else {
                    idx = idx1;
                }
                goto has_idx;
            } else if ((cv->var_name == JS_ATOM__var_ ||
                        cv->var_name == JS_ATOM__arg_var_ ||
                        cv->var_name == JS_ATOM__with_) && !is_pseudo_var) {
                int is_with = (cv->var_name == JS_ATOM__with_);
                if (fd != s) {
                    idx = get_closure_var2(ctx, s, fd,
                                           FALSE,
                                           cv->is_arg, idx1,
                                           cv->var_name, FALSE, FALSE,
                                           JS_VAR_NORMAL);
                } else {
                    idx = idx1;
                }
                dbuf_putc(bc, OP_get_var_ref);
                dbuf_put_u16(bc, idx);
                var_object_test(ctx, s, var_name, op, bc, &label_done, is_with);
            }
        }
    }

    if (var_idx >= 0) {
        /* find the corresponding closure variable */
        if (var_idx & ARGUMENT_VAR_OFFSET) {
            fd->args[var_idx - ARGUMENT_VAR_OFFSET].is_captured = 1;
            idx = get_closure_var(ctx, s, fd,
                                  TRUE, var_idx - ARGUMENT_VAR_OFFSET,
                                  var_name, FALSE, FALSE, JS_VAR_NORMAL);
        } else {
            fd->vars[var_idx].is_captured = 1;
            idx = get_closure_var(ctx, s, fd,
                                  FALSE, var_idx,
                                  var_name,
                                  fd->vars[var_idx].is_const,
                                  fd->vars[var_idx].is_lexical,
                                  (JSVarKindEnum) fd->vars[var_idx].var_kind);
        }
        if (idx >= 0) {
        has_idx:
            if ((op == OP_scope_put_var || op == OP_scope_make_ref) &&
                s->closure_var[idx].is_const) {
                dbuf_putc(bc, OP_throw_error);
                dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
                dbuf_putc(bc, JS_THROW_VAR_RO);
                goto done;
            }
            switch (op) {
            case OP_scope_make_ref:
                if (s->closure_var[idx].var_kind == JS_VAR_FUNCTION_NAME) {
                    /* Create a dummy object reference for the func_var */
                    dbuf_putc(bc, OP_object);
                    dbuf_putc(bc, OP_get_var_ref);
                    dbuf_put_u16(bc, idx);
                    dbuf_putc(bc, OP_define_field);
                    dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
                    dbuf_putc(bc, OP_push_atom_value);
                    dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
                } else
                if (label_done == -1 &&
                    can_opt_put_ref_value(bc_buf, ls->pos)) {
                    int get_op;
                    if (s->closure_var[idx].is_lexical)
                        get_op = OP_get_var_ref_check;
                    else
                        get_op = OP_get_var_ref;
                    pos_next = optimize_scope_make_ref(ctx, s, bc, bc_buf, ls,
                                                       pos_next,
                                                       get_op, idx);
                } else {
                    /* Create a dummy object with a named slot that is
                       a reference to the closure variable */
                    dbuf_putc(bc, OP_make_var_ref_ref);
                    dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
                    dbuf_put_u16(bc, idx);
                }
                break;
            case OP_scope_get_ref:
                /* XXX: should create a dummy object with a named slot that is
                   a reference to the closure variable */
                dbuf_putc(bc, OP_undefined);
                /* fall thru */
            case OP_scope_get_var_undef:
            case OP_scope_get_var:
            case OP_scope_put_var:
            case OP_scope_put_var_init:
                is_put = (op == OP_scope_put_var ||
                          op == OP_scope_put_var_init);
                if (is_put) {
                    if (s->closure_var[idx].is_lexical) {
                        if (op == OP_scope_put_var_init) {
                            /* 'this' can only be initialized once */
                            if (var_name == JS_ATOM_this)
                                dbuf_putc(bc, OP_put_var_ref_check_init);
                            else
                                dbuf_putc(bc, OP_put_var_ref);
                        } else {
                            dbuf_putc(bc, OP_put_var_ref_check);
                        }
                    } else {
                        dbuf_putc(bc, OP_put_var_ref);
                    }
                } else {
                    if (s->closure_var[idx].is_lexical) {
                        dbuf_putc(bc, OP_get_var_ref_check);
                    } else {
                        dbuf_putc(bc, OP_get_var_ref);
                    }
                }
                dbuf_put_u16(bc, idx);
                break;
            case OP_scope_delete_var:
                dbuf_putc(bc, OP_push_false);
                break;
            }
            goto done;
        }
    }

    /* global variable access */

    switch (op) {
    case OP_scope_make_ref:
        if (label_done == -1 && can_opt_put_global_ref_value(bc_buf, ls->pos)) {
            pos_next = optimize_scope_make_global_ref(ctx, s, bc, bc_buf, ls,
                                                      pos_next, var_name);
        } else {
            dbuf_putc(bc, OP_make_var_ref);
            dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
        }
        break;
    case OP_scope_get_ref:
        /* XXX: should create a dummy object with a named slot that is
           a reference to the global variable */
        dbuf_putc(bc, OP_undefined);
        dbuf_putc(bc, OP_get_var);
        dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
        break;
    case OP_scope_get_var_undef:
    case OP_scope_get_var:
    case OP_scope_put_var:
        dbuf_putc(bc, OP_get_var_undef + (op - OP_scope_get_var_undef));
        dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
        break;
    case OP_scope_put_var_init:
        dbuf_putc(bc, OP_put_var_init);
        dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
        break;
    case OP_scope_delete_var:
        dbuf_putc(bc, OP_delete_var);
        dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
        break;
    }
done:
    if (label_done >= 0) {
        dbuf_putc(bc, OP_label);
        dbuf_put_u32(bc, label_done);
        s->label_slots[label_done].pos2 = bc->size;
    }
    return pos_next;
}

/* search in all scopes */
static int find_private_class_field_all(JSContext *ctx, JSFunctionDef *fd,
                                        JSAtom name, int scope_level)
{
    int idx;

    idx = fd->scopes[scope_level].first;
    while (idx >= 0) {
        if (fd->vars[idx].var_name == name)
            return idx;
        idx = fd->vars[idx].scope_next;
    }
    return -1;
}

static void get_loc_or_ref(DynBuf *bc, BOOL is_ref, int idx)
{
    /* if the field is not initialized, the error is catched when
       accessing it */
    if (is_ref)
        dbuf_putc(bc, OP_get_var_ref);
    else
        dbuf_putc(bc, OP_get_loc);
    dbuf_put_u16(bc, idx);
}

static int resolve_scope_private_field1(JSContext *ctx,
                                        BOOL *pis_ref, int *pvar_kind,
                                        JSFunctionDef *s,
                                        JSAtom var_name, int scope_level)
{
    int idx, var_kind;
    JSFunctionDef *fd;
    BOOL is_ref;

    fd = s;
    is_ref = FALSE;
    for(;;) {
        idx = find_private_class_field_all(ctx, fd, var_name, scope_level);
        if (idx >= 0) {
            var_kind = fd->vars[idx].var_kind;
            if (is_ref) {
                idx = get_closure_var(ctx, s, fd, FALSE, idx, var_name,
                                      TRUE, TRUE, JS_VAR_NORMAL);
                if (idx < 0)
                    return -1;
            }
            break;
        }
        scope_level = fd->parent_scope_level;
        if (!fd->parent) {
            if (fd->is_eval) {
                /* closure of the eval function (top level) */
                for (idx = 0; idx < fd->closure_var_count; idx++) {
                    JSClosureVar *cv = &fd->closure_var[idx];
                    if (cv->var_name == var_name) {
                        var_kind = cv->var_kind;
                        is_ref = TRUE;
                        if (fd != s) {
                            idx = get_closure_var2(ctx, s, fd,
                                                   FALSE,
                                                   cv->is_arg, idx,
                                                   cv->var_name, cv->is_const,
                                                   cv->is_lexical,
                                                   (JSVarKindEnum) cv->var_kind);
                            if (idx < 0)
                                return -1;
                        }
                        goto done;
                    }
                }
            }
            /* XXX: no line number info */
            JS_ThrowSyntaxErrorAtom(ctx, "undefined private field '%s'",
                                    var_name);
            return -1;
        } else {
            fd = fd->parent;
        }
        is_ref = TRUE;
    }
 done:
    *pis_ref = is_ref;
    *pvar_kind = var_kind;
    return idx;
}

/* return 0 if OK or -1 if the private field could not be resolved */
static int resolve_scope_private_field(JSContext *ctx, JSFunctionDef *s,
                                       JSAtom var_name, int scope_level, int op,
                                       DynBuf *bc)
{
    int idx, var_kind;
    BOOL is_ref;

    idx = resolve_scope_private_field1(ctx, &is_ref, &var_kind, s,
                                       var_name, scope_level);
    if (idx < 0)
        return -1;
    assert(var_kind != JS_VAR_NORMAL);
    switch (op) {
    case OP_scope_get_private_field:
    case OP_scope_get_private_field2:
        switch(var_kind) {
        case JS_VAR_PRIVATE_FIELD:
            if (op == OP_scope_get_private_field2)
                dbuf_putc(bc, OP_dup);
            get_loc_or_ref(bc, is_ref, idx);
            dbuf_putc(bc, OP_get_private_field);
            break;
        case JS_VAR_PRIVATE_METHOD:
            get_loc_or_ref(bc, is_ref, idx);
            dbuf_putc(bc, OP_check_brand);
            if (op != OP_scope_get_private_field2)
                dbuf_putc(bc, OP_nip);
            break;
        case JS_VAR_PRIVATE_GETTER:
        case JS_VAR_PRIVATE_GETTER_SETTER:
            if (op == OP_scope_get_private_field2)
                dbuf_putc(bc, OP_dup);
            get_loc_or_ref(bc, is_ref, idx);
            dbuf_putc(bc, OP_check_brand);
            dbuf_putc(bc, OP_call_method);
            dbuf_put_u16(bc, 0);
            break;
        case JS_VAR_PRIVATE_SETTER:
            /* XXX: add clearer error message */
            dbuf_putc(bc, OP_throw_error);
            dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
            dbuf_putc(bc, JS_THROW_VAR_RO);
            break;
        default:
            abort();
        }
        break;
    case OP_scope_put_private_field:
        switch(var_kind) {
        case JS_VAR_PRIVATE_FIELD:
            get_loc_or_ref(bc, is_ref, idx);
            dbuf_putc(bc, OP_put_private_field);
            break;
        case JS_VAR_PRIVATE_METHOD:
        case JS_VAR_PRIVATE_GETTER:
            /* XXX: add clearer error message */
            dbuf_putc(bc, OP_throw_error);
            dbuf_put_u32(bc, JS_DupAtom(ctx, var_name));
            dbuf_putc(bc, JS_THROW_VAR_RO);
            break;
        case JS_VAR_PRIVATE_SETTER:
        case JS_VAR_PRIVATE_GETTER_SETTER:
            {
                JSAtom setter_name = get_private_setter_name(ctx, var_name);
                if (setter_name == JS_ATOM_NULL)
                    return -1;
                idx = resolve_scope_private_field1(ctx, &is_ref,
                                                   &var_kind, s,
                                                   setter_name, scope_level);
                JS_FreeAtom(ctx, setter_name);
                if (idx < 0)
                    return -1;
                assert(var_kind == JS_VAR_PRIVATE_SETTER);
                get_loc_or_ref(bc, is_ref, idx);
                dbuf_putc(bc, OP_swap);
                /* obj func value */
                dbuf_putc(bc, OP_rot3r);
                /* value obj func */
                dbuf_putc(bc, OP_check_brand);
                dbuf_putc(bc, OP_rot3l);
                /* obj func value */
                dbuf_putc(bc, OP_call_method);
                dbuf_put_u16(bc, 1);
            }
            break;
        default:
            abort();
        }
        break;
    default:
        abort();
    }
    return 0;
}

static void mark_eval_captured_variables(JSContext *ctx, JSFunctionDef *s,
                                         int scope_level)
{
    int idx;
    JSVarDef *vd;

    for (idx = s->scopes[scope_level].first; idx >= 0;) {
        vd = &s->vars[idx];
        vd->is_captured = 1;
        idx = vd->scope_next;
    }
}

/* XXX: should handle the argument scope generically */
static BOOL is_var_in_arg_scope(const JSVarDef *vd)
{
    return (vd->var_name == JS_ATOM_home_object ||
            vd->var_name == JS_ATOM_this_active_func ||
            vd->var_name == JS_ATOM_new_target ||
            vd->var_name == JS_ATOM_this ||
            vd->var_name == JS_ATOM__arg_var_ ||
            vd->var_kind == JS_VAR_FUNCTION_NAME);
}

static void add_eval_variables(JSContext *ctx, JSFunctionDef *s)
{
    JSFunctionDef *fd;
    JSVarDef *vd;
    int i, scope_level, scope_idx;
    BOOL has_arguments_binding, has_this_binding, is_arg_scope;

    /* in non strict mode, variables are created in the caller's
       environment object */
    if (!s->is_eval && !(s->js_mode & JS_MODE_STRICT)) {
        s->var_object_idx = add_var(ctx, s, JS_ATOM__var_);
        if (s->has_parameter_expressions) {
            /* an additional variable object is needed for the
               argument scope */
            s->arg_var_object_idx = add_var(ctx, s, JS_ATOM__arg_var_);
        }
    }

    /* eval can potentially use 'arguments' so we must define it */
    has_this_binding = s->has_this_binding;
    if (has_this_binding) {
        if (s->this_var_idx < 0)
            s->this_var_idx = add_var_this(ctx, s);
        if (s->new_target_var_idx < 0)
            s->new_target_var_idx = add_var(ctx, s, JS_ATOM_new_target);
        if (s->is_derived_class_constructor && s->this_active_func_var_idx < 0)
            s->this_active_func_var_idx = add_var(ctx, s, JS_ATOM_this_active_func);
        if (s->has_home_object && s->home_object_var_idx < 0)
            s->home_object_var_idx = add_var(ctx, s, JS_ATOM_home_object);
    }
    has_arguments_binding = s->has_arguments_binding;
    if (has_arguments_binding) {
        add_arguments_var(ctx, s);
        /* also add an arguments binding in the argument scope to
           raise an error if a direct eval in the argument scope tries
           to redefine it */
        if (s->has_parameter_expressions && !(s->js_mode & JS_MODE_STRICT))
            add_arguments_arg(ctx, s);
    }
    if (s->is_func_expr && s->func_name != JS_ATOM_NULL)
        add_func_var(ctx, s, s->func_name);

    /* eval can use all the variables of the enclosing functions, so
       they must be all put in the closure. The closure variables are
       ordered by scope. It works only because no closure are created
       before. */
    assert(s->is_eval || s->closure_var_count == 0);

    /* XXX: inefficient, but eval performance is less critical */
    fd = s;
    for(;;) {
        scope_level = fd->parent_scope_level;
        fd = fd->parent;
        if (!fd)
            break;
        /* add 'this' if it was not previously added */
        if (!has_this_binding && fd->has_this_binding) {
            if (fd->this_var_idx < 0)
                fd->this_var_idx = add_var_this(ctx, fd);
            if (fd->new_target_var_idx < 0)
                fd->new_target_var_idx = add_var(ctx, fd, JS_ATOM_new_target);
            if (fd->is_derived_class_constructor && fd->this_active_func_var_idx < 0)
                fd->this_active_func_var_idx = add_var(ctx, fd, JS_ATOM_this_active_func);
            if (fd->has_home_object && fd->home_object_var_idx < 0)
                fd->home_object_var_idx = add_var(ctx, fd, JS_ATOM_home_object);
            has_this_binding = TRUE;
        }
        /* add 'arguments' if it was not previously added */
        if (!has_arguments_binding && fd->has_arguments_binding) {
            add_arguments_var(ctx, fd);
            has_arguments_binding = TRUE;
        }
        /* add function name */
        if (fd->is_func_expr && fd->func_name != JS_ATOM_NULL)
            add_func_var(ctx, fd, fd->func_name);

        /* add lexical variables */
        scope_idx = fd->scopes[scope_level].first;
        while (scope_idx >= 0) {
            vd = &fd->vars[scope_idx];
            vd->is_captured = 1;
            get_closure_var(ctx, s, fd, FALSE, scope_idx,
                            vd->var_name, vd->is_const, vd->is_lexical, (JSVarKindEnum) vd->var_kind);
            scope_idx = vd->scope_next;
        }
        is_arg_scope = (scope_idx == ARG_SCOPE_END);
        if (!is_arg_scope) {
            /* add unscoped variables */
            for(i = 0; i < fd->arg_count; i++) {
                vd = &fd->args[i];
                if (vd->var_name != JS_ATOM_NULL) {
                    get_closure_var(ctx, s, fd,
                                    TRUE, i, vd->var_name, FALSE, FALSE,
                                    JS_VAR_NORMAL);
                }
            }
            for(i = 0; i < fd->var_count; i++) {
                vd = &fd->vars[i];
                /* do not close top level last result */
                if (vd->scope_level == 0 &&
                    vd->var_name != JS_ATOM__ret_ &&
                    vd->var_name != JS_ATOM_NULL) {
                    get_closure_var(ctx, s, fd,
                                    FALSE, i, vd->var_name, FALSE, FALSE,
                                    JS_VAR_NORMAL);
                }
            }
        } else {
            for(i = 0; i < fd->var_count; i++) {
                vd = &fd->vars[i];
                /* do not close top level last result */
                if (vd->scope_level == 0 && is_var_in_arg_scope(vd)) {
                    get_closure_var(ctx, s, fd,
                                    FALSE, i, vd->var_name, FALSE, FALSE,
                                    JS_VAR_NORMAL);
                }
            }
        }
        if (fd->is_eval) {
            int idx;
            /* add direct eval variables (we are necessarily at the
               top level) */
            for (idx = 0; idx < fd->closure_var_count; idx++) {
                JSClosureVar *cv = &fd->closure_var[idx];
                get_closure_var2(ctx, s, fd,
                                 FALSE, cv->is_arg,
                                 idx, cv->var_name, cv->is_const,
                                 cv->is_lexical, (JSVarKindEnum) cv->var_kind);
            }
        }
    }
}

static void set_closure_from_var(JSContext *ctx, JSClosureVar *cv,
                                 JSVarDef *vd, int var_idx)
{
    cv->is_local = TRUE;
    cv->is_arg = FALSE;
    cv->is_const = vd->is_const;
    cv->is_lexical = vd->is_lexical;
    cv->var_kind = vd->var_kind;
    cv->var_idx = var_idx;
    cv->var_name = JS_DupAtom(ctx, vd->var_name);
}

/* for direct eval compilation: add references to the variables of the
   calling function */
[[nodiscard]] static int add_closure_variables(JSContext *ctx, JSFunctionDef *s,
                                             JSFunctionBytecode *b, int scope_idx)
{
    int i, count;
    JSVarDef *vd;
    BOOL is_arg_scope;

    count = b->arg_count + b->var_count + b->closure_var_count;
    s->closure_var = NULL;
    s->closure_var_count = 0;
    s->closure_var_size = count;
    if (count == 0)
        return 0;
    s->closure_var = (JSClosureVar*) js_malloc(ctx, sizeof(s->closure_var[0]) * count);
    if (!s->closure_var)
        return -1;
    /* Add lexical variables in scope at the point of evaluation */
    for (i = scope_idx; i >= 0;) {
        vd = &b->vardefs[b->arg_count + i];
        if (vd->scope_level > 0) {
            JSClosureVar *cv = &s->closure_var[s->closure_var_count++];
            set_closure_from_var(ctx, cv, vd, i);
        }
        i = vd->scope_next;
    }
    is_arg_scope = (i == ARG_SCOPE_END);
    if (!is_arg_scope) {
        /* Add argument variables */
        for(i = 0; i < b->arg_count; i++) {
            JSClosureVar *cv = &s->closure_var[s->closure_var_count++];
            vd = &b->vardefs[i];
            cv->is_local = TRUE;
            cv->is_arg = TRUE;
            cv->is_const = FALSE;
            cv->is_lexical = FALSE;
            cv->var_kind = JS_VAR_NORMAL;
            cv->var_idx = i;
            cv->var_name = JS_DupAtom(ctx, vd->var_name);
        }
        /* Add local non lexical variables */
        for(i = 0; i < b->var_count; i++) {
            vd = &b->vardefs[b->arg_count + i];
            if (vd->scope_level == 0 && vd->var_name != JS_ATOM__ret_) {
                JSClosureVar *cv = &s->closure_var[s->closure_var_count++];
                set_closure_from_var(ctx, cv, vd, i);
            }
        }
    } else {
        /* only add pseudo variables */
        for(i = 0; i < b->var_count; i++) {
            vd = &b->vardefs[b->arg_count + i];
            if (vd->scope_level == 0 && is_var_in_arg_scope(vd)) {
                JSClosureVar *cv = &s->closure_var[s->closure_var_count++];
                set_closure_from_var(ctx, cv, vd, i);
            }
        }
    }
    for(i = 0; i < b->closure_var_count; i++) {
        JSClosureVar *cv0 = &b->closure_var[i];
        JSClosureVar *cv = &s->closure_var[s->closure_var_count++];
        cv->is_local = FALSE;
        cv->is_arg = cv0->is_arg;
        cv->is_const = cv0->is_const;
        cv->is_lexical = cv0->is_lexical;
        cv->var_kind = cv0->var_kind;
        cv->var_idx = i;
        cv->var_name = JS_DupAtom(ctx, cv0->var_name);
    }
    return 0;
}

typedef struct CodeContext {
    const uint8_t *bc_buf; /* code buffer */
    int bc_len;   /* length of the code buffer */
    int pos;      /* position past the matched code pattern */
    int line_num; /* last visited OP_line_num parameter or -1 */
    int op;
    int idx;
    int label;
    int val;
    JSAtom atom;
} CodeContext;

#define M2(op1, op2)            ((op1) | ((op2) << 8))
#define M3(op1, op2, op3)       ((op1) | ((op2) << 8) | ((op3) << 16))
#define M4(op1, op2, op3, op4)  ((op1) | ((op2) << 8) | ((op3) << 16) | ((op4) << 24))

static BOOL code_match(CodeContext *s, int pos, ...)
{
    const uint8_t *tab = s->bc_buf;
    int op, len, op1, line_num, pos_next;
    va_list ap;
    BOOL ret = FALSE;

    line_num = -1;
    va_start(ap, pos);

    for(;;) {
        op1 = va_arg(ap, int);
        if (op1 == -1) {
            s->pos = pos;
            s->line_num = line_num;
            ret = TRUE;
            break;
        }
        for (;;) {
            if (pos >= s->bc_len)
                goto done;
            op = tab[pos];
            len = opcode_info[op].size;
            pos_next = pos + len;
            if (pos_next > s->bc_len)
                goto done;
            if (op == OP_line_num) {
                line_num = get_u32(tab + pos + 1);
                pos = pos_next;
            } else {
                break;
            }
        }
        if (op != op1) {
            if (op1 == (uint8_t)op1 || !op)
                break;
            if (op != (uint8_t)op1
            &&  op != (uint8_t)(op1 >> 8)
            &&  op != (uint8_t)(op1 >> 16)
            &&  op != (uint8_t)(op1 >> 24)) {
                break;
            }
            s->op = op;
        }

        pos++;
        switch(opcode_info[op].fmt) {
        case OP_FMT_loc8:
        case OP_FMT_u8:
            {
                int idx = tab[pos];
                int arg = va_arg(ap, int);
                if (arg == -1) {
                    s->idx = idx;
                } else {
                    if (arg != idx)
                        goto done;
                }
                break;
            }
        case OP_FMT_u16:
        case OP_FMT_npop:
        case OP_FMT_loc:
        case OP_FMT_arg:
        case OP_FMT_var_ref:
            {
                int idx = get_u16(tab + pos);
                int arg = va_arg(ap, int);
                if (arg == -1) {
                    s->idx = idx;
                } else {
                    if (arg != idx)
                        goto done;
                }
                break;
            }
        case OP_FMT_i32:
        case OP_FMT_u32:
        case OP_FMT_label:
        case OP_FMT_const:
            {
                s->label = get_u32(tab + pos);
                break;
            }
        case OP_FMT_label_u16:
            {
                s->label = get_u32(tab + pos);
                s->val = get_u16(tab + pos + 4);
                break;
            }
        case OP_FMT_atom:
            {
                s->atom = get_u32(tab + pos);
                break;
            }
        case OP_FMT_atom_u8:
            {
                s->atom = get_u32(tab + pos);
                s->val = get_u8(tab + pos + 4);
                break;
            }
        case OP_FMT_atom_u16:
            {
                s->atom = get_u32(tab + pos);
                s->val = get_u16(tab + pos + 4);
                break;
            }
        case OP_FMT_atom_label_u8:
            {
                s->atom = get_u32(tab + pos);
                s->label = get_u32(tab + pos + 4);
                s->val = get_u8(tab + pos + 8);
                break;
            }
        default:
            break;
        }
        pos = pos_next;
    }
 done:
    va_end(ap);
    return ret;
}

static void instantiate_hoisted_definitions(JSContext *ctx, JSFunctionDef *s, DynBuf *bc)
{
    int i, idx, label_next = -1;

    /* add the hoisted functions in arguments and local variables */
    for(i = 0; i < s->arg_count; i++) {
        JSVarDef *vd = &s->args[i];
        if (vd->func_pool_idx >= 0) {
            dbuf_putc(bc, OP_fclosure);
            dbuf_put_u32(bc, vd->func_pool_idx);
            dbuf_putc(bc, OP_put_arg);
            dbuf_put_u16(bc, i);
        }
    }
    for(i = 0; i < s->var_count; i++) {
        JSVarDef *vd = &s->vars[i];
        if (vd->scope_level == 0 && vd->func_pool_idx >= 0) {
            dbuf_putc(bc, OP_fclosure);
            dbuf_put_u32(bc, vd->func_pool_idx);
            dbuf_putc(bc, OP_put_loc);
            dbuf_put_u16(bc, i);
        }
    }

    /* the module global variables must be initialized before
       evaluating the module so that the exported functions are
       visible if there are cyclic module references */
    if (s->module) {
        label_next = new_label_fd(s, -1);

        /* if 'this' is true, initialize the global variables and return */
        dbuf_putc(bc, OP_push_this);
        dbuf_putc(bc, OP_if_false);
        dbuf_put_u32(bc, label_next);
        update_label(s, label_next, 1);
        s->jump_size++;
    }

    /* add the global variables (only happens if s->is_global_var is
       true) */
    for(i = 0; i < s->global_var_count; i++) {
        JSGlobalVar *hf = &s->global_vars[i];
        int has_closure = 0;
        BOOL force_init = hf->force_init;
        /* we are in an eval, so the closure contains all the
           enclosing variables */
        /* If the outer function has a variable environment,
           create a property for the variable there */
        for(idx = 0; idx < s->closure_var_count; idx++) {
            JSClosureVar *cv = &s->closure_var[idx];
            if (cv->var_name == hf->var_name) {
                has_closure = 2;
                force_init = FALSE;
                break;
            }
            if (cv->var_name == JS_ATOM__var_ ||
                cv->var_name == JS_ATOM__arg_var_) {
                dbuf_putc(bc, OP_get_var_ref);
                dbuf_put_u16(bc, idx);
                has_closure = 1;
                force_init = TRUE;
                break;
            }
        }
        if (!has_closure) {
            int flags;

            flags = 0;
            if (s->eval_type != JS_EVAL_TYPE_GLOBAL)
                flags |= JS_PROP_CONFIGURABLE;
            if (hf->cpool_idx >= 0 && !hf->is_lexical) {
                /* global function definitions need a specific handling */
                dbuf_putc(bc, OP_fclosure);
                dbuf_put_u32(bc, hf->cpool_idx);

                dbuf_putc(bc, OP_define_func);
                dbuf_put_u32(bc, JS_DupAtom(ctx, hf->var_name));
                dbuf_putc(bc, flags);

                goto done_global_var;
            } else {
                if (hf->is_lexical) {
                    flags |= DEFINE_GLOBAL_LEX_VAR;
                    if (!hf->is_const)
                        flags |= JS_PROP_WRITABLE;
                }
                dbuf_putc(bc, OP_define_var);
                dbuf_put_u32(bc, JS_DupAtom(ctx, hf->var_name));
                dbuf_putc(bc, flags);
            }
        }
        if (hf->cpool_idx >= 0 || force_init) {
            if (hf->cpool_idx >= 0) {
                dbuf_putc(bc, OP_fclosure);
                dbuf_put_u32(bc, hf->cpool_idx);
                if (hf->var_name == JS_ATOM__default_) {
                    /* set default export function name */
                    dbuf_putc(bc, OP_set_name);
                    dbuf_put_u32(bc, JS_DupAtom(ctx, JS_ATOM_default));
                }
            } else {
                dbuf_putc(bc, OP_undefined);
            }
            if (has_closure == 2) {
                dbuf_putc(bc, OP_put_var_ref);
                dbuf_put_u16(bc, idx);
            } else if (has_closure == 1) {
                dbuf_putc(bc, OP_define_field);
                dbuf_put_u32(bc, JS_DupAtom(ctx, hf->var_name));
                dbuf_putc(bc, OP_drop);
            } else {
                /* XXX: Check if variable is writable and enumerable */
                dbuf_putc(bc, OP_put_var);
                dbuf_put_u32(bc, JS_DupAtom(ctx, hf->var_name));
            }
        }
    done_global_var:
        JS_FreeAtom(ctx, hf->var_name);
    }

    if (s->module) {
        dbuf_putc(bc, OP_return_undef);

        dbuf_putc(bc, OP_label);
        dbuf_put_u32(bc, label_next);
        s->label_slots[label_next].pos2 = bc->size;
    }

    js_free(ctx, s->global_vars);
    s->global_vars = NULL;
    s->global_var_count = 0;
    s->global_var_size = 0;
}

static int skip_dead_code(JSFunctionDef *s, const uint8_t *bc_buf, int bc_len,
                          int pos, int *linep)
{
    int op, len, label;

    for (; pos < bc_len; pos += len) {
        op = bc_buf[pos];
        len = opcode_info[op].size;
        if (op == OP_line_num) {
            *linep = get_u32(bc_buf + pos + 1);
        } else
        if (op == OP_label) {
            label = get_u32(bc_buf + pos + 1);
            if (update_label(s, label, 0) > 0)
                break;
#if 0
            if (s->label_slots[label].first_reloc) {
                printf("line %d: unreferenced label %d:%d has relocations\n",
                       *linep, label, s->label_slots[label].pos2);
            }
#endif
            assert(s->label_slots[label].first_reloc == NULL);
        } else {
            /* XXX: output a warning for unreachable code? */
            JSAtom atom;
            switch(opcode_info[op].fmt) {
            case OP_FMT_label:
            case OP_FMT_label_u16:
                label = get_u32(bc_buf + pos + 1);
                update_label(s, label, -1);
                break;
            case OP_FMT_atom_label_u8:
            case OP_FMT_atom_label_u16:
                label = get_u32(bc_buf + pos + 5);
                update_label(s, label, -1);
                /* fall thru */
            case OP_FMT_atom:
            case OP_FMT_atom_u8:
            case OP_FMT_atom_u16:
                atom = get_u32(bc_buf + pos + 1);
                JS_FreeAtom(s->ctx, atom);
                break;
            default:
                break;
            }
        }
    }
    return pos;
}

static int get_label_pos(JSFunctionDef *s, int label)
{
    int i, pos;
    for (i = 0; i < 20; i++) {
        pos = s->label_slots[label].pos;
        for (;;) {
            switch (s->byte_code.buf[pos]) {
            case OP_line_num:
            case OP_label:
                pos += 5;
                continue;
            case OP_goto:
                label = get_u32(s->byte_code.buf + pos + 1);
                break;
            default:
                return pos;
            }
            break;
        }
    }
    return pos;
}

/* convert global variable accesses to local variables or closure
   variables when necessary */
[[nodiscard]] static int resolve_variables(JSContext *ctx, JSFunctionDef *s)
{
    int pos, pos_next, bc_len, op, len, i, idx, line_num;
    uint8_t *bc_buf;
    JSAtom var_name;
    DynBuf bc_out;
    CodeContext cc;
    int scope;

    cc.bc_buf = bc_buf = s->byte_code.buf;
    cc.bc_len = bc_len = s->byte_code.size;
    js_dbuf_init(ctx, &bc_out);

    /* first pass for runtime checks (must be done before the
       variables are created) */
    for(i = 0; i < s->global_var_count; i++) {
        JSGlobalVar *hf = &s->global_vars[i];
        int flags;

        /* check if global variable (XXX: simplify) */
        for(idx = 0; idx < s->closure_var_count; idx++) {
            JSClosureVar *cv = &s->closure_var[idx];
            if (cv->var_name == hf->var_name) {
                if (s->eval_type == JS_EVAL_TYPE_DIRECT &&
                    cv->is_lexical) {
                    /* Check if a lexical variable is
                       redefined as 'var'. XXX: Could abort
                       compilation here, but for consistency
                       with the other checks, we delay the
                       error generation. */
                    dbuf_putc(&bc_out, OP_throw_error);
                    dbuf_put_u32(&bc_out, JS_DupAtom(ctx, hf->var_name));
                    dbuf_putc(&bc_out, JS_THROW_VAR_REDECL);
                }
                goto next;
            }
            if (cv->var_name == JS_ATOM__var_ ||
                cv->var_name == JS_ATOM__arg_var_)
                goto next;
        }

        dbuf_putc(&bc_out, OP_check_define_var);
        dbuf_put_u32(&bc_out, JS_DupAtom(ctx, hf->var_name));
        flags = 0;
        if (hf->is_lexical)
            flags |= DEFINE_GLOBAL_LEX_VAR;
        if (hf->cpool_idx >= 0)
            flags |= DEFINE_GLOBAL_FUNC_VAR;
        dbuf_putc(&bc_out, flags);
    next: ;
    }

    line_num = 0; /* avoid warning */
    for (pos = 0; pos < bc_len; pos = pos_next) {
        op = bc_buf[pos];
        len = opcode_info[op].size;
        pos_next = pos + len;
        switch(op) {
        case OP_line_num:
            line_num = get_u32(bc_buf + pos + 1);
            s->line_number_size++;
            goto no_change;

        case OP_eval: /* convert scope index to adjusted variable index */
            {
                int call_argc = get_u16(bc_buf + pos + 1);
                scope = get_u16(bc_buf + pos + 1 + 2);
                mark_eval_captured_variables(ctx, s, scope);
                dbuf_putc(&bc_out, op);
                dbuf_put_u16(&bc_out, call_argc);
                dbuf_put_u16(&bc_out, s->scopes[scope].first + 1);
            }
            break;
        case OP_apply_eval: /* convert scope index to adjusted variable index */
            scope = get_u16(bc_buf + pos + 1);
            mark_eval_captured_variables(ctx, s, scope);
            dbuf_putc(&bc_out, op);
            dbuf_put_u16(&bc_out, s->scopes[scope].first + 1);
            break;
        case OP_scope_get_var_undef:
        case OP_scope_get_var:
        case OP_scope_put_var:
        case OP_scope_delete_var:
        case OP_scope_get_ref:
        case OP_scope_put_var_init:
            var_name = get_u32(bc_buf + pos + 1);
            scope = get_u16(bc_buf + pos + 5);
            pos_next = resolve_scope_var(ctx, s, var_name, scope, op, &bc_out,
                                         NULL, NULL, pos_next);
            JS_FreeAtom(ctx, var_name);
            break;
        case OP_scope_make_ref:
            {
                int label;
                LabelSlot *ls;
                var_name = get_u32(bc_buf + pos + 1);
                label = get_u32(bc_buf + pos + 5);
                scope = get_u16(bc_buf + pos + 9);
                ls = &s->label_slots[label];
                ls->ref_count--;  /* always remove label reference */
                pos_next = resolve_scope_var(ctx, s, var_name, scope, op, &bc_out,
                                             bc_buf, ls, pos_next);
                JS_FreeAtom(ctx, var_name);
            }
            break;
        case OP_scope_get_private_field:
        case OP_scope_get_private_field2:
        case OP_scope_put_private_field:
            {
                int ret;
                var_name = get_u32(bc_buf + pos + 1);
                scope = get_u16(bc_buf + pos + 5);
                ret = resolve_scope_private_field(ctx, s, var_name, scope, op, &bc_out);
                if (ret < 0)
                    goto fail;
                JS_FreeAtom(ctx, var_name);
            }
            break;
        case OP_gosub:
            s->jump_size++;
            if (OPTIMIZE) {
                /* remove calls to empty finalizers  */
                int label;
                LabelSlot *ls;

                label = get_u32(bc_buf + pos + 1);
                assert(label >= 0 && label < s->label_count);
                ls = &s->label_slots[label];
                if (code_match(&cc, ls->pos, OP_ret, -1)) {
                    ls->ref_count--;
                    break;
                }
            }
            goto no_change;
        case OP_drop:
            if (0) {
                /* remove drops before return_undef */
                /* do not perform this optimization in pass2 because
                   it breaks patterns recognised in resolve_labels */
                int pos1 = pos_next;
                int line1 = line_num;
                while (code_match(&cc, pos1, OP_drop, -1)) {
                    if (cc.line_num >= 0) line1 = cc.line_num;
                    pos1 = cc.pos;
                }
                if (code_match(&cc, pos1, OP_return_undef, -1)) {
                    pos_next = pos1;
                    if (line1 != -1 && line1 != line_num) {
                        line_num = line1;
                        s->line_number_size++;
                        dbuf_putc(&bc_out, OP_line_num);
                        dbuf_put_u32(&bc_out, line_num);
                    }
                    break;
                }
            }
            goto no_change;
        case OP_insert3:
            if (OPTIMIZE) {
                /* Transformation: insert3 put_array_el|put_ref_value drop -> put_array_el|put_ref_value */
                if (code_match(&cc, pos_next, M2(OP_put_array_el, OP_put_ref_value), OP_drop, -1)) {
                    dbuf_putc(&bc_out, cc.op);
                    pos_next = cc.pos;
                    if (cc.line_num != -1 && cc.line_num != line_num) {
                        line_num = cc.line_num;
                        s->line_number_size++;
                        dbuf_putc(&bc_out, OP_line_num);
                        dbuf_put_u32(&bc_out, line_num);
                    }
                    break;
                }
            }
            goto no_change;

        case OP_goto:
            s->jump_size++;
            /* fall thru */
        case OP_tail_call:
        case OP_tail_call_method:
        case OP_return:
        case OP_return_undef:
        case OP_throw:
        case OP_throw_error:
        case OP_ret:
            if (OPTIMIZE) {
                /* remove dead code */
                int line = -1;
                dbuf_put(&bc_out, bc_buf + pos, len);
                pos = skip_dead_code(s, bc_buf, bc_len, pos + len, &line);
                pos_next = pos;
                if (pos < bc_len && line >= 0 && line_num != line) {
                    line_num = line;
                    s->line_number_size++;
                    dbuf_putc(&bc_out, OP_line_num);
                    dbuf_put_u32(&bc_out, line_num);
                }
                break;
            }
            goto no_change;

        case OP_label:
            {
                int label;
                LabelSlot *ls;

                label = get_u32(bc_buf + pos + 1);
                assert(label >= 0 && label < s->label_count);
                ls = &s->label_slots[label];
                ls->pos2 = bc_out.size + opcode_info[op].size;
            }
            goto no_change;

        case OP_enter_scope:
            {
                int scope_idx, scope = get_u16(bc_buf + pos + 1);

                if (scope == s->body_scope) {
                    instantiate_hoisted_definitions(ctx, s, &bc_out);
                }

                for(scope_idx = s->scopes[scope].first; scope_idx >= 0;) {
                    JSVarDef *vd = &s->vars[scope_idx];
                    if (vd->scope_level == scope) {
                        if (scope_idx != s->arguments_arg_idx) {
                            if (vd->var_kind == JS_VAR_FUNCTION_DECL ||
                                vd->var_kind == JS_VAR_NEW_FUNCTION_DECL) {
                                /* Initialize lexical variable upon entering scope */
                                dbuf_putc(&bc_out, OP_fclosure);
                                dbuf_put_u32(&bc_out, vd->func_pool_idx);
                                dbuf_putc(&bc_out, OP_put_loc);
                                dbuf_put_u16(&bc_out, scope_idx);
                            } else {
                                /* XXX: should check if variable can be used
                                   before initialization */
                                dbuf_putc(&bc_out, OP_set_loc_uninitialized);
                                dbuf_put_u16(&bc_out, scope_idx);
                            }
                        }
                        scope_idx = vd->scope_next;
                    } else {
                        break;
                    }
                }
            }
            break;

        case OP_leave_scope:
            {
                int scope_idx, scope = get_u16(bc_buf + pos + 1);

                for(scope_idx = s->scopes[scope].first; scope_idx >= 0;) {
                    JSVarDef *vd = &s->vars[scope_idx];
                    if (vd->scope_level == scope) {
                        if (vd->is_captured) {
                            dbuf_putc(&bc_out, OP_close_loc);
                            dbuf_put_u16(&bc_out, scope_idx);
                        }
                        scope_idx = vd->scope_next;
                    } else {
                        break;
                    }
                }
            }
            break;

        case OP_set_name:
            {
                /* remove dummy set_name opcodes */
                JSAtom name = get_u32(bc_buf + pos + 1);
                if (name == JS_ATOM_NULL)
                    break;
            }
            goto no_change;

        case OP_if_false:
        case OP_if_true:
        case OP_catch:
            s->jump_size++;
            goto no_change;

        case OP_dup:
            if (OPTIMIZE) {
                /* Transformation: dup if_false(l1) drop, l1: if_false(l2) -> if_false(l2) */
                /* Transformation: dup if_true(l1) drop, l1: if_true(l2) -> if_true(l2) */
                if (code_match(&cc, pos_next, M2(OP_if_false, OP_if_true), OP_drop, -1)) {
                    int lab0, lab1, op1, pos1, line1, pos2;
                    lab0 = lab1 = cc.label;
                    assert(lab1 >= 0 && lab1 < s->label_count);
                    op1 = cc.op;
                    pos1 = cc.pos;
                    line1 = cc.line_num;
                    while (code_match(&cc, (pos2 = get_label_pos(s, lab1)), OP_dup, op1, OP_drop, -1)) {
                        lab1 = cc.label;
                    }
                    if (code_match(&cc, pos2, op1, -1)) {
                        s->jump_size++;
                        update_label(s, lab0, -1);
                        update_label(s, cc.label, +1);
                        dbuf_putc(&bc_out, op1);
                        dbuf_put_u32(&bc_out, cc.label);
                        pos_next = pos1;
                        if (line1 != -1 && line1 != line_num) {
                            line_num = line1;
                            s->line_number_size++;
                            dbuf_putc(&bc_out, OP_line_num);
                            dbuf_put_u32(&bc_out, line_num);
                        }
                        break;
                    }
                }
            }
            goto no_change;

        case OP_nop:
            /* remove erased code */
            break;
        case OP_set_class_name:
            /* only used during parsing */
            break;

        default:
        no_change:
            dbuf_put(&bc_out, bc_buf + pos, len);
            break;
        }
    }

    /* set the new byte code */
    dbuf_free(&s->byte_code);
    s->byte_code = bc_out;
    if (dbuf_error(&s->byte_code)) {
        JS_ThrowOutOfMemory(ctx);
        return -1;
    }
    return 0;
 fail:
    /* continue the copy to keep the atom refcounts consistent */
    /* XXX: find a better solution ? */
    for (; pos < bc_len; pos = pos_next) {
        op = bc_buf[pos];
        len = opcode_info[op].size;
        pos_next = pos + len;
        dbuf_put(&bc_out, bc_buf + pos, len);
    }
    dbuf_free(&s->byte_code);
    s->byte_code = bc_out;
    return -1;
}

/* the pc2line table gives a line number for each PC value */
static void add_pc2line_info(JSFunctionDef *s, uint32_t pc, int line_num)
{
    if (s->line_number_slots != NULL
    &&  s->line_number_count < s->line_number_size
    &&  pc >= s->line_number_last_pc
    &&  line_num != s->line_number_last) {
        s->line_number_slots[s->line_number_count].pc = pc;
        s->line_number_slots[s->line_number_count].line_num = line_num;
        s->line_number_count++;
        s->line_number_last_pc = pc;
        s->line_number_last = line_num;
    }
}

static void compute_pc2line_info(JSFunctionDef *s)
{
    if (!(s->js_mode & JS_MODE_STRIP) && s->line_number_slots) {
        int last_line_num = s->line_num;
        uint32_t last_pc = 0;
        int i;

        js_dbuf_init(s->ctx, &s->pc2line);
        for (i = 0; i < s->line_number_count; i++) {
            uint32_t pc = s->line_number_slots[i].pc;
            int line_num = s->line_number_slots[i].line_num;
            int diff_pc, diff_line;

            if (line_num < 0)
                continue;

            diff_pc = pc - last_pc;
            diff_line = line_num - last_line_num;
            if (diff_line == 0 || diff_pc < 0)
                continue;

            if (diff_line >= PC2LINE_BASE &&
                diff_line < PC2LINE_BASE + PC2LINE_RANGE &&
                diff_pc <= PC2LINE_DIFF_PC_MAX) {
                dbuf_putc(&s->pc2line, (diff_line - PC2LINE_BASE) +
                          diff_pc * PC2LINE_RANGE + PC2LINE_OP_FIRST);
            } else {
                /* longer encoding */
                dbuf_putc(&s->pc2line, 0);
                dbuf_put_leb128(&s->pc2line, diff_pc);
                dbuf_put_sleb128(&s->pc2line, diff_line);
            }
            last_pc = pc;
            last_line_num = line_num;
        }
    }
}

static RelocEntry *add_reloc(JSContext *ctx, LabelSlot *ls, uint32_t addr, int size)
{
    RelocEntry *re;
    re = (RelocEntry*) js_malloc(ctx, sizeof(*re));
    if (!re)
        return NULL;
    re->addr = addr;
    re->size = size;
    re->next = ls->first_reloc;
    ls->first_reloc = re;
    return re;
}

static BOOL code_has_label(CodeContext *s, int pos, int label)
{
    while (pos < s->bc_len) {
        int op = s->bc_buf[pos];
        if (op == OP_line_num) {
            pos += 5;
            continue;
        }
        if (op == OP_label) {
            int lab = get_u32(s->bc_buf + pos + 1);
            if (lab == label)
                return TRUE;
            pos += 5;
            continue;
        }
        if (op == OP_goto) {
            int lab = get_u32(s->bc_buf + pos + 1);
            if (lab == label)
                return TRUE;
        }
        break;
    }
    return FALSE;
}

/* return the target label, following the OP_goto jumps
   the first opcode at destination is stored in *pop
 */
static int find_jump_target(JSFunctionDef *s, int label, int *pop, int *pline)
{
    int i, pos, op;

    update_label(s, label, -1);
    for (i = 0; i < 10; i++) {
        assert(label >= 0 && label < s->label_count);
        pos = s->label_slots[label].pos2;
        for (;;) {
            switch(op = s->byte_code.buf[pos]) {
            case OP_line_num:
                if (pline)
                    *pline = get_u32(s->byte_code.buf + pos + 1);
                /* fall thru */
            case OP_label:
                pos += opcode_info[op].size;
                continue;
            case OP_goto:
                label = get_u32(s->byte_code.buf + pos + 1);
                break;
            case OP_drop:
                /* ignore drop opcodes if followed by OP_return_undef */
                while (s->byte_code.buf[++pos] == OP_drop)
                    continue;
                if (s->byte_code.buf[pos] == OP_return_undef)
                    op = OP_return_undef;
                /* fall thru */
            default:
                goto done;
            }
            break;
        }
    }
    /* cycle detected, could issue a warning */
 done:
    *pop = op;
    update_label(s, label, +1);
    return label;
}

static void push_short_int(DynBuf *bc_out, int val)
{
#if SHORT_OPCODES
    if (val >= -1 && val <= 7) {
        dbuf_putc(bc_out, OP_push_0 + val);
        return;
    }
    if (val == (int8_t)val) {
        dbuf_putc(bc_out, OP_push_i8);
        dbuf_putc(bc_out, val);
        return;
    }
    if (val == (int16_t)val) {
        dbuf_putc(bc_out, OP_push_i16);
        dbuf_put_u16(bc_out, val);
        return;
    }
#endif
    dbuf_putc(bc_out, OP_push_i32);
    dbuf_put_u32(bc_out, val);
}

static void put_short_code(DynBuf *bc_out, int op, int idx)
{
#if SHORT_OPCODES
    if (idx < 4) {
        switch (op) {
        case OP_get_loc:
            dbuf_putc(bc_out, OP_get_loc0 + idx);
            return;
        case OP_put_loc:
            dbuf_putc(bc_out, OP_put_loc0 + idx);
            return;
        case OP_set_loc:
            dbuf_putc(bc_out, OP_set_loc0 + idx);
            return;
        case OP_get_arg:
            dbuf_putc(bc_out, OP_get_arg0 + idx);
            return;
        case OP_put_arg:
            dbuf_putc(bc_out, OP_put_arg0 + idx);
            return;
        case OP_set_arg:
            dbuf_putc(bc_out, OP_set_arg0 + idx);
            return;
        case OP_get_var_ref:
            dbuf_putc(bc_out, OP_get_var_ref0 + idx);
            return;
        case OP_put_var_ref:
            dbuf_putc(bc_out, OP_put_var_ref0 + idx);
            return;
        case OP_set_var_ref:
            dbuf_putc(bc_out, OP_set_var_ref0 + idx);
            return;
        case OP_call:
            dbuf_putc(bc_out, OP_call0 + idx);
            return;
        }
    }
    if (idx < 256) {
        switch (op) {
        case OP_get_loc:
            dbuf_putc(bc_out, OP_get_loc8);
            dbuf_putc(bc_out, idx);
            return;
        case OP_put_loc:
            dbuf_putc(bc_out, OP_put_loc8);
            dbuf_putc(bc_out, idx);
            return;
        case OP_set_loc:
            dbuf_putc(bc_out, OP_set_loc8);
            dbuf_putc(bc_out, idx);
            return;
        }
    }
#endif
    dbuf_putc(bc_out, op);
    dbuf_put_u16(bc_out, idx);
}

/* peephole optimizations and resolve goto/labels */
[[nodiscard]] static int resolve_labels(JSContext *ctx, JSFunctionDef *s)
{
    int pos, pos_next, bc_len, op, op1, len, i, line_num;
    const uint8_t *bc_buf;
    DynBuf bc_out;
    LabelSlot *label_slots, *ls;
    RelocEntry *re, *re_next;
    CodeContext cc;
    int label;
#if SHORT_OPCODES
    JumpSlot *jp;
#endif

    label_slots = s->label_slots;

    line_num = s->line_num;

    cc.bc_buf = bc_buf = s->byte_code.buf;
    cc.bc_len = bc_len = s->byte_code.size;
    js_dbuf_init(ctx, &bc_out);

#if SHORT_OPCODES
    if (s->jump_size) {
        s->jump_slots = (JumpSlot*) js_mallocz(s->ctx, sizeof(*s->jump_slots) * s->jump_size);
        if (s->jump_slots == NULL)
            return -1;
    }
#endif
    /* XXX: Should skip this phase if not generating SHORT_OPCODES */
    if (s->line_number_size && !(s->js_mode & JS_MODE_STRIP)) {
        s->line_number_slots = (LineNumberSlot*) js_mallocz(s->ctx, sizeof(*s->line_number_slots) * s->line_number_size);
        if (s->line_number_slots == NULL)
            return -1;
        s->line_number_last = s->line_num;
        s->line_number_last_pc = 0;
    }

    /* initialize the 'home_object' variable if needed */
    if (s->home_object_var_idx >= 0) {
        dbuf_putc(&bc_out, OP_special_object);
        dbuf_putc(&bc_out, OP_SPECIAL_OBJECT_HOME_OBJECT);
        put_short_code(&bc_out, OP_put_loc, s->home_object_var_idx);
    }
    /* initialize the 'this.active_func' variable if needed */
    if (s->this_active_func_var_idx >= 0) {
        dbuf_putc(&bc_out, OP_special_object);
        dbuf_putc(&bc_out, OP_SPECIAL_OBJECT_THIS_FUNC);
        put_short_code(&bc_out, OP_put_loc, s->this_active_func_var_idx);
    }
    /* initialize the 'new.target' variable if needed */
    if (s->new_target_var_idx >= 0) {
        dbuf_putc(&bc_out, OP_special_object);
        dbuf_putc(&bc_out, OP_SPECIAL_OBJECT_NEW_TARGET);
        put_short_code(&bc_out, OP_put_loc, s->new_target_var_idx);
    }
    /* initialize the 'this' variable if needed. In a derived class
       constructor, this is initially uninitialized. */
    if (s->this_var_idx >= 0) {
        if (s->is_derived_class_constructor) {
            dbuf_putc(&bc_out, OP_set_loc_uninitialized);
            dbuf_put_u16(&bc_out, s->this_var_idx);
        } else {
            dbuf_putc(&bc_out, OP_push_this);
            put_short_code(&bc_out, OP_put_loc, s->this_var_idx);
        }
    }
    /* initialize the 'arguments' variable if needed */
    if (s->arguments_var_idx >= 0) {
        if ((s->js_mode & JS_MODE_STRICT) || !s->has_simple_parameter_list) {
            dbuf_putc(&bc_out, OP_special_object);
            dbuf_putc(&bc_out, OP_SPECIAL_OBJECT_ARGUMENTS);
        } else {
            dbuf_putc(&bc_out, OP_special_object);
            dbuf_putc(&bc_out, OP_SPECIAL_OBJECT_MAPPED_ARGUMENTS);
        }
        if (s->arguments_arg_idx >= 0)
            put_short_code(&bc_out, OP_set_loc, s->arguments_arg_idx);
        put_short_code(&bc_out, OP_put_loc, s->arguments_var_idx);
    }
    /* initialize a reference to the current function if needed */
    if (s->func_var_idx >= 0) {
        dbuf_putc(&bc_out, OP_special_object);
        dbuf_putc(&bc_out, OP_SPECIAL_OBJECT_THIS_FUNC);
        put_short_code(&bc_out, OP_put_loc, s->func_var_idx);
    }
    /* initialize the variable environment object if needed */
    if (s->var_object_idx >= 0) {
        dbuf_putc(&bc_out, OP_special_object);
        dbuf_putc(&bc_out, OP_SPECIAL_OBJECT_VAR_OBJECT);
        put_short_code(&bc_out, OP_put_loc, s->var_object_idx);
    }
    if (s->arg_var_object_idx >= 0) {
        dbuf_putc(&bc_out, OP_special_object);
        dbuf_putc(&bc_out, OP_SPECIAL_OBJECT_VAR_OBJECT);
        put_short_code(&bc_out, OP_put_loc, s->arg_var_object_idx);
    }

    for (pos = 0; pos < bc_len; pos = pos_next) {
        int val;
        op = bc_buf[pos];
        len = opcode_info[op].size;
        pos_next = pos + len;
        switch(op) {
        case OP_line_num:
            /* line number info (for debug). We put it in a separate
               compressed table to reduce memory usage and get better
               performance */
            line_num = get_u32(bc_buf + pos + 1);
            break;

        case OP_label:
            {
                label = get_u32(bc_buf + pos + 1);
                assert(label >= 0 && label < s->label_count);
                ls = &label_slots[label];
                assert(ls->addr == -1);
                ls->addr = bc_out.size;
                /* resolve the relocation entries */
                for(re = ls->first_reloc; re != NULL; re = re_next) {
                    int diff = ls->addr - re->addr;
                    re_next = re->next;
                    switch (re->size) {
                    case 4:
                        put_u32(bc_out.buf + re->addr, diff);
                        break;
                    case 2:
                        assert(diff == (int16_t)diff);
                        put_u16(bc_out.buf + re->addr, diff);
                        break;
                    case 1:
                        assert(diff == (int8_t)diff);
                        put_u8(bc_out.buf + re->addr, diff);
                        break;
                    }
                    js_free(ctx, re);
                }
                ls->first_reloc = NULL;
            }
            break;

        case OP_call:
        case OP_call_method:
            {
                /* detect and transform tail calls */
                int argc;
                argc = get_u16(bc_buf + pos + 1);
                if (code_match(&cc, pos_next, OP_return, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    put_short_code(&bc_out, op + 1, argc);
                    pos_next = skip_dead_code(s, bc_buf, bc_len, cc.pos, &line_num);
                    break;
                }
                add_pc2line_info(s, bc_out.size, line_num);
                put_short_code(&bc_out, op, argc);
                break;
            }
            goto no_change;

        case OP_return:
        case OP_return_undef:
        case OP_return_async:
        case OP_throw:
        case OP_throw_error:
            pos_next = skip_dead_code(s, bc_buf, bc_len, pos_next, &line_num);
            goto no_change;

        case OP_goto:
            label = get_u32(bc_buf + pos + 1);
        has_goto:
            if (OPTIMIZE) {
                int line1 = -1;
                /* Use custom matcher because multiple labels can follow */
                label = find_jump_target(s, label, &op1, &line1);
                if (code_has_label(&cc, pos_next, label)) {
                    /* jump to next instruction: remove jump */
                    update_label(s, label, -1);
                    break;
                }
                if (op1 == OP_return || op1 == OP_return_undef || op1 == OP_throw) {
                    /* jump to return/throw: remove jump, append return/throw */
                    /* updating the line number obfuscates assembly listing */
                    //if (line1 >= 0) line_num = line1;
                    update_label(s, label, -1);
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, op1);
                    pos_next = skip_dead_code(s, bc_buf, bc_len, pos_next, &line_num);
                    break;
                }
                /* XXX: should duplicate single instructions followed by goto or return */
                /* For example, can match one of these followed by return:
                   push_i32 / push_const / push_atom_value / get_var /
                   undefined / null / push_false / push_true / get_ref_value /
                   get_loc / get_arg / get_var_ref
                 */
            }
            goto has_label;

        case OP_gosub:
            label = get_u32(bc_buf + pos + 1);
            if (0 && OPTIMIZE) {
                label = find_jump_target(s, label, &op1, NULL);
                if (op1 == OP_ret) {
                    update_label(s, label, -1);
                    /* empty finally clause: remove gosub */
                    break;
                }
            }
            goto has_label;

        case OP_catch:
            label = get_u32(bc_buf + pos + 1);
            goto has_label;

        case OP_if_true:
        case OP_if_false:
            label = get_u32(bc_buf + pos + 1);
            if (OPTIMIZE) {
                label = find_jump_target(s, label, &op1, NULL);
                /* transform if_false/if_true(l1) label(l1) -> drop label(l1) */
                if (code_has_label(&cc, pos_next, label)) {
                    update_label(s, label, -1);
                    dbuf_putc(&bc_out, OP_drop);
                    break;
                }
                /* transform if_false(l1) goto(l2) label(l1) -> if_false(l2) label(l1) */
                if (code_match(&cc, pos_next, OP_goto, -1)) {
                    int pos1 = cc.pos;
                    int line1 = cc.line_num;
                    if (code_has_label(&cc, pos1, label)) {
                        if (line1 >= 0) line_num = line1;
                        pos_next = pos1;
                        update_label(s, label, -1);
                        label = cc.label;
                        op ^= OP_if_true ^ OP_if_false;
                    }
                }
            }
        has_label:
            add_pc2line_info(s, bc_out.size, line_num);
            if (op == OP_goto) {
                pos_next = skip_dead_code(s, bc_buf, bc_len, pos_next, &line_num);
            }
            assert(label >= 0 && label < s->label_count);
            ls = &label_slots[label];
#if SHORT_OPCODES
            jp = &s->jump_slots[s->jump_count++];
            jp->op = op;
            jp->size = 4;
            jp->pos = bc_out.size + 1;
            jp->label = label;

            if (ls->addr == -1) {
                int diff = ls->pos2 - pos - 1;
                if (diff < 128 && (op == OP_if_false || op == OP_if_true || op == OP_goto)) {
                    jp->size = 1;
                    jp->op = OP_if_false8 + (op - OP_if_false);
                    dbuf_putc(&bc_out, OP_if_false8 + (op - OP_if_false));
                    dbuf_putc(&bc_out, 0);
                    if (!add_reloc(ctx, ls, bc_out.size - 1, 1))
                        goto fail;
                    break;
                }
                if (diff < 32768 && op == OP_goto) {
                    jp->size = 2;
                    jp->op = OP_goto16;
                    dbuf_putc(&bc_out, OP_goto16);
                    dbuf_put_u16(&bc_out, 0);
                    if (!add_reloc(ctx, ls, bc_out.size - 2, 2))
                        goto fail;
                    break;
                }
            } else {
                int diff = ls->addr - bc_out.size - 1;
                if (diff == (int8_t)diff && (op == OP_if_false || op == OP_if_true || op == OP_goto)) {
                    jp->size = 1;
                    jp->op = OP_if_false8 + (op - OP_if_false);
                    dbuf_putc(&bc_out, OP_if_false8 + (op - OP_if_false));
                    dbuf_putc(&bc_out, diff);
                    break;
                }
                if (diff == (int16_t)diff && op == OP_goto) {
                    jp->size = 2;
                    jp->op = OP_goto16;
                    dbuf_putc(&bc_out, OP_goto16);
                    dbuf_put_u16(&bc_out, diff);
                    break;
                }
            }
#endif
            dbuf_putc(&bc_out, op);
            dbuf_put_u32(&bc_out, ls->addr - bc_out.size);
            if (ls->addr == -1) {
                /* unresolved yet: create a new relocation entry */
                if (!add_reloc(ctx, ls, bc_out.size - 4, 4))
                    goto fail;
            }
            break;
        case OP_with_get_var:
        case OP_with_put_var:
        case OP_with_delete_var:
        case OP_with_make_ref:
        case OP_with_get_ref:
        case OP_with_get_ref_undef:
            {
                JSAtom atom;
                int is_with;

                atom = get_u32(bc_buf + pos + 1);
                label = get_u32(bc_buf + pos + 5);
                is_with = bc_buf[pos + 9];
                if (OPTIMIZE) {
                    label = find_jump_target(s, label, &op1, NULL);
                }
                assert(label >= 0 && label < s->label_count);
                ls = &label_slots[label];
                add_pc2line_info(s, bc_out.size, line_num);
#if SHORT_OPCODES
                jp = &s->jump_slots[s->jump_count++];
                jp->op = op;
                jp->size = 4;
                jp->pos = bc_out.size + 5;
                jp->label = label;
#endif
                dbuf_putc(&bc_out, op);
                dbuf_put_u32(&bc_out, atom);
                dbuf_put_u32(&bc_out, ls->addr - bc_out.size);
                if (ls->addr == -1) {
                    /* unresolved yet: create a new relocation entry */
                    if (!add_reloc(ctx, ls, bc_out.size - 4, 4))
                        goto fail;
                }
                dbuf_putc(&bc_out, is_with);
            }
            break;

        case OP_drop:
            if (OPTIMIZE) {
                /* remove useless drops before return */
                if (code_match(&cc, pos_next, OP_return_undef, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    break;
                }
            }
            goto no_change;

        case OP_null:
#if SHORT_OPCODES
            if (OPTIMIZE) {
                /* transform null strict_eq into is_null */
                if (code_match(&cc, pos_next, OP_strict_eq, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, OP_is_null);
                    pos_next = cc.pos;
                    break;
                }
                /* transform null strict_neq if_false/if_true -> is_null if_true/if_false */
                if (code_match(&cc, pos_next, OP_strict_neq, M2(OP_if_false, OP_if_true), -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, OP_is_null);
                    pos_next = cc.pos;
                    label = cc.label;
                    op = cc.op ^ OP_if_false ^ OP_if_true;
                    goto has_label;
                }
            }
#endif
            /* fall thru */
        case OP_push_false:
        case OP_push_true:
            if (OPTIMIZE) {
                val = (op == OP_push_true);
                if (code_match(&cc, pos_next, M2(OP_if_false, OP_if_true), -1)) {
                has_constant_test:
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    if (val == cc.op - OP_if_false) {
                        /* transform null if_false(l1) -> goto l1 */
                        /* transform false if_false(l1) -> goto l1 */
                        /* transform true if_true(l1) -> goto l1 */
                        pos_next = cc.pos;
                        op = OP_goto;
                        label = cc.label;
                        goto has_goto;
                    } else {
                        /* transform null if_true(l1) -> nop */
                        /* transform false if_true(l1) -> nop */
                        /* transform true if_false(l1) -> nop */
                        pos_next = cc.pos;
                        update_label(s, cc.label, -1);
                        break;
                    }
                }
            }
            goto no_change;

        case OP_push_i32:
            if (OPTIMIZE) {
                /* transform i32(val) neg -> i32(-val) */
                val = get_i32(bc_buf + pos + 1);
                if ((val != INT32_MIN && val != 0)
                &&  code_match(&cc, pos_next, OP_neg, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    if (code_match(&cc, cc.pos, OP_drop, -1)) {
                        if (cc.line_num >= 0) line_num = cc.line_num;
                    } else {
                        add_pc2line_info(s, bc_out.size, line_num);
                        push_short_int(&bc_out, -val);
                    }
                    pos_next = cc.pos;
                    break;
                }
                /* remove push/drop pairs generated by the parser */
                if (code_match(&cc, pos_next, OP_drop, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    pos_next = cc.pos;
                    break;
                }
                /* Optimize constant tests: `if (0)`, `if (1)`, `if (!0)`... */
                if (code_match(&cc, pos_next, M2(OP_if_false, OP_if_true), -1)) {
                    val = (val != 0);
                    goto has_constant_test;
                }
                add_pc2line_info(s, bc_out.size, line_num);
                push_short_int(&bc_out, val);
                break;
            }
            goto no_change;

#if SHORT_OPCODES
        case OP_push_const:
        case OP_fclosure:
            if (OPTIMIZE) {
                int idx = get_u32(bc_buf + pos + 1);
                if (idx < 256) {
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, OP_push_const8 + op - OP_push_const);
                    dbuf_putc(&bc_out, idx);
                    break;
                }
            }
            goto no_change;

        case OP_get_field:
            if (OPTIMIZE) {
                JSAtom atom = get_u32(bc_buf + pos + 1);
                if (atom == JS_ATOM_length) {
                    JS_FreeAtom(ctx, atom);
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, OP_get_length);
                    break;
                }
            }
            goto no_change;
#endif
        case OP_push_atom_value:
            if (OPTIMIZE) {
                JSAtom atom = get_u32(bc_buf + pos + 1);
                /* remove push/drop pairs generated by the parser */
                if (code_match(&cc, pos_next, OP_drop, -1)) {
                    JS_FreeAtom(ctx, atom);
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    pos_next = cc.pos;
                    break;
                }
#if SHORT_OPCODES
                if (atom == JS_ATOM_empty_string) {
                    JS_FreeAtom(ctx, atom);
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, OP_push_empty_string);
                    break;
                }
#endif
            }
            goto no_change;

        case OP_to_propkey:
        case OP_to_propkey2:
            if (OPTIMIZE) {
                /* remove redundant to_propkey/to_propkey2 opcodes when storing simple data */
                if (code_match(&cc, pos_next, M3(OP_get_loc, OP_get_arg, OP_get_var_ref), -1, OP_put_array_el, -1)
                ||  code_match(&cc, pos_next, M3(OP_push_i32, OP_push_const, OP_push_atom_value), OP_put_array_el, -1)
                ||  code_match(&cc, pos_next, M4(OP_undefined, OP_null, OP_push_true, OP_push_false), OP_put_array_el, -1)) {
                    break;
                }
            }
            goto no_change;

        case OP_undefined:
            if (OPTIMIZE) {
                /* remove push/drop pairs generated by the parser */
                if (code_match(&cc, pos_next, OP_drop, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    pos_next = cc.pos;
                    break;
                }
                /* transform undefined return -> return_undefined */
                if (code_match(&cc, pos_next, OP_return, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, OP_return_undef);
                    pos_next = cc.pos;
                    break;
                }
                /* transform undefined if_true(l1)/if_false(l1) -> nop/goto(l1) */
                if (code_match(&cc, pos_next, M2(OP_if_false, OP_if_true), -1)) {
                    val = 0;
                    goto has_constant_test;
                }
#if SHORT_OPCODES
                /* transform undefined strict_eq -> is_undefined */
                if (code_match(&cc, pos_next, OP_strict_eq, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, OP_is_undefined);
                    pos_next = cc.pos;
                    break;
                }
                /* transform undefined strict_neq if_false/if_true -> is_undefined if_true/if_false */
                if (code_match(&cc, pos_next, OP_strict_neq, M2(OP_if_false, OP_if_true), -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, OP_is_undefined);
                    pos_next = cc.pos;
                    label = cc.label;
                    op = cc.op ^ OP_if_false ^ OP_if_true;
                    goto has_label;
                }
#endif
            }
            goto no_change;

        case OP_insert2:
            if (OPTIMIZE) {
                /* Transformation:
                   insert2 put_field(a) drop -> put_field(a)
                   insert2 put_var_strict(a) drop -> put_var_strict(a)
                */
                if (code_match(&cc, pos_next, M2(OP_put_field, OP_put_var_strict), OP_drop, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, cc.op);
                    dbuf_put_u32(&bc_out, cc.atom);
                    pos_next = cc.pos;
                    break;
                }
            }
            goto no_change;

        case OP_dup:
            if (OPTIMIZE) {
                /* Transformation: dup put_x(n) drop -> put_x(n) */
                int op1, line2 = -1;
                /* Transformation: dup put_x(n) -> set_x(n) */
                if (code_match(&cc, pos_next, M3(OP_put_loc, OP_put_arg, OP_put_var_ref), -1, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    op1 = cc.op + 1;  /* put_x -> set_x */
                    pos_next = cc.pos;
                    if (code_match(&cc, cc.pos, OP_drop, -1)) {
                        if (cc.line_num >= 0) line_num = cc.line_num;
                        op1 -= 1; /* set_x drop -> put_x */
                        pos_next = cc.pos;
                        if (code_match(&cc, cc.pos, op1 - 1, cc.idx, -1)) {
                            line2 = cc.line_num; /* delay line number update */
                            op1 += 1;   /* put_x(n) get_x(n) -> set_x(n) */
                            pos_next = cc.pos;
                        }
                    }
                    add_pc2line_info(s, bc_out.size, line_num);
                    put_short_code(&bc_out, op1, cc.idx);
                    if (line2 >= 0) line_num = line2;
                    break;
                }
            }
            goto no_change;

        case OP_get_loc:
            if (OPTIMIZE) {
                /* transformation:
                   get_loc(n) post_dec put_loc(n) drop -> dec_loc(n)
                   get_loc(n) post_inc put_loc(n) drop -> inc_loc(n)
                   get_loc(n) dec dup put_loc(n) drop -> dec_loc(n)
                   get_loc(n) inc dup put_loc(n) drop -> inc_loc(n)
                 */
                int idx;
                idx = get_u16(bc_buf + pos + 1);
                if (idx >= 256)
                    goto no_change;
                if (code_match(&cc, pos_next, M2(OP_post_dec, OP_post_inc), OP_put_loc, idx, OP_drop, -1) ||
                    code_match(&cc, pos_next, M2(OP_dec, OP_inc), OP_dup, OP_put_loc, idx, OP_drop, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, (cc.op == OP_inc || cc.op == OP_post_inc) ? OP_inc_loc : OP_dec_loc);
                    dbuf_putc(&bc_out, idx);
                    pos_next = cc.pos;
                    break;
                }
                /* transformation:
                   get_loc(n) push_atom_value(x) add dup put_loc(n) drop -> push_atom_value(x) add_loc(n)
                 */
                if (code_match(&cc, pos_next, OP_push_atom_value, OP_add, OP_dup, OP_put_loc, idx, OP_drop, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
#if SHORT_OPCODES
                    if (cc.atom == JS_ATOM_empty_string) {
                        JS_FreeAtom(ctx, cc.atom);
                        dbuf_putc(&bc_out, OP_push_empty_string);
                    } else
#endif
                    {
                        dbuf_putc(&bc_out, OP_push_atom_value);
                        dbuf_put_u32(&bc_out, cc.atom);
                    }
                    dbuf_putc(&bc_out, OP_add_loc);
                    dbuf_putc(&bc_out, idx);
                    pos_next = cc.pos;
                    break;
                }
                /* transformation:
                   get_loc(n) push_i32(x) add dup put_loc(n) drop -> push_i32(x) add_loc(n)
                 */
                if (code_match(&cc, pos_next, OP_push_i32, OP_add, OP_dup, OP_put_loc, idx, OP_drop, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    push_short_int(&bc_out, cc.label);
                    dbuf_putc(&bc_out, OP_add_loc);
                    dbuf_putc(&bc_out, idx);
                    pos_next = cc.pos;
                    break;
                }
                /* transformation: XXX: also do these:
                   get_loc(n) get_loc(x) add dup put_loc(n) drop -> get_loc(x) add_loc(n)
                   get_loc(n) get_arg(x) add dup put_loc(n) drop -> get_arg(x) add_loc(n)
                   get_loc(n) get_var_ref(x) add dup put_loc(n) drop -> get_var_ref(x) add_loc(n)
                 */
                if (code_match(&cc, pos_next, M3(OP_get_loc, OP_get_arg, OP_get_var_ref), -1, OP_add, OP_dup, OP_put_loc, idx, OP_drop, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    put_short_code(&bc_out, cc.op, cc.idx);
                    dbuf_putc(&bc_out, OP_add_loc);
                    dbuf_putc(&bc_out, idx);
                    pos_next = cc.pos;
                    break;
                }
                add_pc2line_info(s, bc_out.size, line_num);
                put_short_code(&bc_out, op, idx);
                break;
            }
            goto no_change;
#if SHORT_OPCODES
        case OP_get_arg:
        case OP_get_var_ref:
            if (OPTIMIZE) {
                int idx;
                idx = get_u16(bc_buf + pos + 1);
                add_pc2line_info(s, bc_out.size, line_num);
                put_short_code(&bc_out, op, idx);
                break;
            }
            goto no_change;
#endif
        case OP_put_loc:
        case OP_put_arg:
        case OP_put_var_ref:
            if (OPTIMIZE) {
                /* transformation: put_x(n) get_x(n) -> set_x(n) */
                int idx;
                idx = get_u16(bc_buf + pos + 1);
                if (code_match(&cc, pos_next, op - 1, idx, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    put_short_code(&bc_out, op + 1, idx);
                    pos_next = cc.pos;
                    break;
                }
                add_pc2line_info(s, bc_out.size, line_num);
                put_short_code(&bc_out, op, idx);
                break;
            }
            goto no_change;

        case OP_post_inc:
        case OP_post_dec:
            if (OPTIMIZE) {
                /* transformation:
                   post_inc put_x drop -> inc put_x
                   post_inc perm3 put_field drop -> inc put_field
                   post_inc perm3 put_var_strict drop -> inc put_var_strict
                   post_inc perm4 put_array_el drop -> inc put_array_el
                 */
                int op1, idx;
                if (code_match(&cc, pos_next, M3(OP_put_loc, OP_put_arg, OP_put_var_ref), -1, OP_drop, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    op1 = cc.op;
                    idx = cc.idx;
                    pos_next = cc.pos;
                    if (code_match(&cc, cc.pos, op1 - 1, idx, -1)) {
                        if (cc.line_num >= 0) line_num = cc.line_num;
                        op1 += 1;   /* put_x(n) get_x(n) -> set_x(n) */
                        pos_next = cc.pos;
                    }
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, OP_dec + (op - OP_post_dec));
                    put_short_code(&bc_out, op1, idx);
                    break;
                }
                if (code_match(&cc, pos_next, OP_perm3, M2(OP_put_field, OP_put_var_strict), OP_drop, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, OP_dec + (op - OP_post_dec));
                    dbuf_putc(&bc_out, cc.op);
                    dbuf_put_u32(&bc_out, cc.atom);
                    pos_next = cc.pos;
                    break;
                }
                if (code_match(&cc, pos_next, OP_perm4, OP_put_array_el, OP_drop, -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    add_pc2line_info(s, bc_out.size, line_num);
                    dbuf_putc(&bc_out, OP_dec + (op - OP_post_dec));
                    dbuf_putc(&bc_out, OP_put_array_el);
                    pos_next = cc.pos;
                    break;
                }
            }
            goto no_change;

#if SHORT_OPCODES
        case OP_typeof:
            if (OPTIMIZE) {
                /* simplify typeof tests */
                if (code_match(&cc, pos_next, OP_push_atom_value, M4(OP_strict_eq, OP_strict_neq, OP_eq, OP_neq), -1)) {
                    if (cc.line_num >= 0) line_num = cc.line_num;
                    int op1 = (cc.op == OP_strict_eq || cc.op == OP_eq) ? OP_strict_eq : OP_strict_neq;
                    int op2 = -1;
                    switch (cc.atom) {
                    case JS_ATOM_undefined:
                        op2 = OP_typeof_is_undefined;
                        break;
                    case JS_ATOM_function:
                        op2 = OP_typeof_is_function;
                        break;
                    }
                    if (op2 >= 0) {
                        /* transform typeof(s) == "<type>" into is_<type> */
                        if (op1 == OP_strict_eq) {
                            add_pc2line_info(s, bc_out.size, line_num);
                            dbuf_putc(&bc_out, op2);
                            JS_FreeAtom(ctx, cc.atom);
                            pos_next = cc.pos;
                            break;
                        }
                        if (op1 == OP_strict_neq && code_match(&cc, cc.pos, OP_if_false, -1)) {
                            /* transform typeof(s) != "<type>" if_false into is_<type> if_true */
                            if (cc.line_num >= 0) line_num = cc.line_num;
                            add_pc2line_info(s, bc_out.size, line_num);
                            dbuf_putc(&bc_out, op2);
                            JS_FreeAtom(ctx, cc.atom);
                            pos_next = cc.pos;
                            label = cc.label;
                            op = OP_if_true;
                            goto has_label;
                        }
                    }
                }
            }
            goto no_change;
#endif

        default:
        no_change:
            add_pc2line_info(s, bc_out.size, line_num);
            dbuf_put(&bc_out, bc_buf + pos, len);
            break;
        }
    }

    /* check that there were no missing labels */
    for(i = 0; i < s->label_count; i++) {
        assert(label_slots[i].first_reloc == NULL);
    }
#if SHORT_OPCODES
    if (OPTIMIZE) {
        /* more jump optimizations */
        int patch_offsets = 0;
        for (i = 0, jp = s->jump_slots; i < s->jump_count; i++, jp++) {
            LabelSlot *ls;
            JumpSlot *jp1;
            int j, pos, diff, delta;

            delta = 3;
            switch (op = jp->op) {
            case OP_goto16:
                delta = 1;
                /* fall thru */
            case OP_if_false:
            case OP_if_true:
            case OP_goto:
                pos = jp->pos;
                diff = s->label_slots[jp->label].addr - pos;
                if (diff >= -128 && diff <= 127 + delta) {
                    //put_u8(bc_out.buf + pos, diff);
                    jp->size = 1;
                    if (op == OP_goto16) {
                        bc_out.buf[pos - 1] = jp->op = OP_goto8;
                    } else {
                        bc_out.buf[pos - 1] = jp->op = OP_if_false8 + (op - OP_if_false);
                    }
                    goto shrink;
                } else
                if (diff == (int16_t)diff && op == OP_goto) {
                    //put_u16(bc_out.buf + pos, diff);
                    jp->size = 2;
                    delta = 2;
                    bc_out.buf[pos - 1] = jp->op = OP_goto16;
                shrink:
                    /* XXX: should reduce complexity, using 2 finger copy scheme */
                    memmove(bc_out.buf + pos + jp->size, bc_out.buf + pos + jp->size + delta,
                            bc_out.size - pos - jp->size - delta);
                    bc_out.size -= delta;
                    patch_offsets++;
                    for (j = 0, ls = s->label_slots; j < s->label_count; j++, ls++) {
                        if (ls->addr > pos)
                            ls->addr -= delta;
                    }
                    for (j = i + 1, jp1 = jp + 1; j < s->jump_count; j++, jp1++) {
                        if (jp1->pos > pos)
                            jp1->pos -= delta;
                    }
                    for (j = 0; j < s->line_number_count; j++) {
                        if (s->line_number_slots[j].pc > pos)
                            s->line_number_slots[j].pc -= delta;
                    }
                    continue;
                }
                break;
            }
        }
        if (patch_offsets) {
            JumpSlot *jp1;
            int j;
            for (j = 0, jp1 = s->jump_slots; j < s->jump_count; j++, jp1++) {
                int diff1 = s->label_slots[jp1->label].addr - jp1->pos;
                switch (jp1->size) {
                case 1:
                    put_u8(bc_out.buf + jp1->pos, diff1);
                    break;
                case 2:
                    put_u16(bc_out.buf + jp1->pos, diff1);
                    break;
                case 4:
                    put_u32(bc_out.buf + jp1->pos, diff1);
                    break;
                }
            }
        }
    }
    js_free(ctx, s->jump_slots);
    s->jump_slots = NULL;
#endif
    js_free(ctx, s->label_slots);
    s->label_slots = NULL;
    /* XXX: should delay until copying to runtime bytecode function */
    compute_pc2line_info(s);
    js_free(ctx, s->line_number_slots);
    s->line_number_slots = NULL;
    /* set the new byte code */
    dbuf_free(&s->byte_code);
    s->byte_code = bc_out;
    s->use_short_opcodes = TRUE;
    if (dbuf_error(&s->byte_code)) {
        JS_ThrowOutOfMemory(ctx);
        return -1;
    }
    return 0;
 fail:
    /* XXX: not safe */
    dbuf_free(&bc_out);
    return -1;
}

/* compute the maximum stack size needed by the function */

typedef struct StackSizeState {
    int bc_len;
    int stack_len_max;
    uint16_t *stack_level_tab;
    int *pc_stack;
    int pc_stack_len;
    int pc_stack_size;
} StackSizeState;

/* 'op' is only used for error indication */
[[nodiscard]] static int ss_check(JSContext *ctx, StackSizeState *s,
                                int pos, int op, int stack_len)
{
    if ((unsigned)pos >= s->bc_len) {
        JS_ThrowInternalError(ctx, "bytecode buffer overflow (op=%d, pc=%d)", op, pos);
        return -1;
    }
    if (stack_len > s->stack_len_max) {
        s->stack_len_max = stack_len;
        if (s->stack_len_max > JS_STACK_SIZE_MAX) {
            JS_ThrowInternalError(ctx, "stack overflow (op=%d, pc=%d)", op, pos);
            return -1;
        }
    }
    if (s->stack_level_tab[pos] != 0xffff) {
        /* already explored: check that the stack size is consistent */
        if (s->stack_level_tab[pos] != stack_len) {
            JS_ThrowInternalError(ctx, "unconsistent stack size: %d %d (pc=%d)",
                                  s->stack_level_tab[pos], stack_len, pos);
            return -1;
        } else {
            return 0;
        }
    }

    /* mark as explored and store the stack size */
    s->stack_level_tab[pos] = stack_len;

    /* queue the new PC to explore */
    if (js_resize_array(ctx, (void **)&s->pc_stack, sizeof(s->pc_stack[0]),
                        &s->pc_stack_size, s->pc_stack_len + 1))
        return -1;
    s->pc_stack[s->pc_stack_len++] = pos;
    return 0;
}

[[nodiscard]] static int compute_stack_size(JSContext *ctx,
                                          JSFunctionDef *fd,
                                          int *pstack_size)
{
    StackSizeState s_s, *s = &s_s;
    int i, diff, n_pop, pos_next, stack_len, pos, op;
    const JSOpCode *oi;
    const uint8_t *bc_buf;

    bc_buf = fd->byte_code.buf;
    s->bc_len = fd->byte_code.size;
    /* bc_len > 0 */
    s->stack_level_tab = (uint16_t*) js_malloc(ctx, sizeof(s->stack_level_tab[0]) *
                                   s->bc_len);
    if (!s->stack_level_tab)
        return -1;
    for(i = 0; i < s->bc_len; i++)
        s->stack_level_tab[i] = 0xffff;
    s->stack_len_max = 0;
    s->pc_stack = NULL;
    s->pc_stack_len = 0;
    s->pc_stack_size = 0;

    /* breadth-first graph exploration */
    if (ss_check(ctx, s, 0, OP_invalid, 0))
        goto fail;

    while (s->pc_stack_len > 0) {
        pos = s->pc_stack[--s->pc_stack_len];
        stack_len = s->stack_level_tab[pos];
        op = bc_buf[pos];
        if (op == 0 || op >= OP_COUNT) {
            JS_ThrowInternalError(ctx, "invalid opcode (op=%d, pc=%d)", op, pos);
            goto fail;
        }
        oi = &short_opcode_info(op);
        pos_next = pos + oi->size;
        if (pos_next > s->bc_len) {
            JS_ThrowInternalError(ctx, "bytecode buffer overflow (op=%d, pc=%d)", op, pos);
            goto fail;
        }
        n_pop = oi->n_pop;
        /* call pops a variable number of arguments */
        if (oi->fmt == OP_FMT_npop || oi->fmt == OP_FMT_npop_u16) {
            n_pop += get_u16(bc_buf + pos + 1);
        } else {
#if SHORT_OPCODES
            if (oi->fmt == OP_FMT_npopx) {
                n_pop += op - OP_call0;
            }
#endif
        }

        if (stack_len < n_pop) {
            JS_ThrowInternalError(ctx, "stack underflow (op=%d, pc=%d)", op, pos);
            goto fail;
        }
        stack_len += oi->n_push - n_pop;
        if (stack_len > s->stack_len_max) {
            s->stack_len_max = stack_len;
            if (s->stack_len_max > JS_STACK_SIZE_MAX) {
                JS_ThrowInternalError(ctx, "stack overflow (op=%d, pc=%d)", op, pos);
                goto fail;
            }
        }
        switch(op) {
        case OP_tail_call:
        case OP_tail_call_method:
        case OP_return:
        case OP_return_undef:
        case OP_return_async:
        case OP_throw:
        case OP_throw_error:
        case OP_ret:
            goto done_insn;
        case OP_goto:
            diff = get_u32(bc_buf + pos + 1);
            pos_next = pos + 1 + diff;
            break;
#if SHORT_OPCODES
        case OP_goto16:
            diff = (int16_t)get_u16(bc_buf + pos + 1);
            pos_next = pos + 1 + diff;
            break;
        case OP_goto8:
            diff = (int8_t)bc_buf[pos + 1];
            pos_next = pos + 1 + diff;
            break;
        case OP_if_true8:
        case OP_if_false8:
            diff = (int8_t)bc_buf[pos + 1];
            if (ss_check(ctx, s, pos + 1 + diff, op, stack_len))
                goto fail;
            break;
#endif
        case OP_if_true:
        case OP_if_false:
        case OP_catch:
            diff = get_u32(bc_buf + pos + 1);
            if (ss_check(ctx, s, pos + 1 + diff, op, stack_len))
                goto fail;
            break;
        case OP_gosub:
            diff = get_u32(bc_buf + pos + 1);
            if (ss_check(ctx, s, pos + 1 + diff, op, stack_len + 1))
                goto fail;
            break;
        case OP_with_get_var:
        case OP_with_delete_var:
            diff = get_u32(bc_buf + pos + 5);
            if (ss_check(ctx, s, pos + 5 + diff, op, stack_len + 1))
                goto fail;
            break;
        case OP_with_make_ref:
        case OP_with_get_ref:
        case OP_with_get_ref_undef:
            diff = get_u32(bc_buf + pos + 5);
            if (ss_check(ctx, s, pos + 5 + diff, op, stack_len + 2))
                goto fail;
            break;
        case OP_with_put_var:
            diff = get_u32(bc_buf + pos + 5);
            if (ss_check(ctx, s, pos + 5 + diff, op, stack_len - 1))
                goto fail;
            break;

        default:
            break;
        }
        if (ss_check(ctx, s, pos_next, op, stack_len))
            goto fail;
    done_insn: ;
    }
    js_free(ctx, s->stack_level_tab);
    js_free(ctx, s->pc_stack);
    *pstack_size = s->stack_len_max;
    return 0;
 fail:
    js_free(ctx, s->stack_level_tab);
    js_free(ctx, s->pc_stack);
    *pstack_size = 0;
    return -1;
}

static int add_module_variables(JSContext *ctx, JSFunctionDef *fd)
{
    int i, idx;
    JSModuleDef *m = fd->module;
    JSExportEntry *me;
    JSGlobalVar *hf;

    /* The imported global variables were added as closure variables
       in js_parse_import(). We add here the module global
       variables. */

    for(i = 0; i < fd->global_var_count; i++) {
        hf = &fd->global_vars[i];
        if (add_closure_var(ctx, fd, TRUE, FALSE, i, hf->var_name, hf->is_const,
                            hf->is_lexical, JS_VAR_NORMAL) < 0)
            return -1;
    }

    /* resolve the variable names of the local exports */
    for(i = 0; i < m->export_entries_count; i++) {
        me = &m->export_entries[i];
        if (me->export_type == JS_EXPORT_TYPE_LOCAL) {
            idx = find_closure_var(ctx, fd, me->local_name);
            if (idx < 0) {
                JS_ThrowSyntaxErrorAtom(ctx, "exported variable '%s' does not exist",
                                        me->local_name);
                return -1;
            }
            me->u.local.var_idx = idx;
        }
    }
    return 0;
}

/* create a function object from a function definition. The function
   definition is freed. All the child functions are also created. It
   must be done this way to resolve all the variables. */
static JSValue js_create_function(JSContext *ctx, JSFunctionDef *fd)
{
    JSValue func_obj;
    JSFunctionBytecode *b;
    struct list_head *el, *el1;
    int stack_size, scope, idx;
    int function_size, byte_code_offset, cpool_offset;
    int closure_var_offset, vardefs_offset;

    /* recompute scope linkage */
    for (scope = 0; scope < fd->scope_count; scope++) {
        fd->scopes[scope].first = -1;
    }
    if (fd->has_parameter_expressions) {
        /* special end of variable list marker for the argument scope */
        fd->scopes[ARG_SCOPE_INDEX].first = ARG_SCOPE_END;
    }
    for (idx = 0; idx < fd->var_count; idx++) {
        JSVarDef *vd = &fd->vars[idx];
        vd->scope_next = fd->scopes[vd->scope_level].first;
        fd->scopes[vd->scope_level].first = idx;
    }
    for (scope = 2; scope < fd->scope_count; scope++) {
        JSVarScope *sd = &fd->scopes[scope];
        if (sd->first < 0)
            sd->first = fd->scopes[sd->parent].first;
    }
    for (idx = 0; idx < fd->var_count; idx++) {
        JSVarDef *vd = &fd->vars[idx];
        if (vd->scope_next < 0 && vd->scope_level > 1) {
            scope = fd->scopes[vd->scope_level].parent;
            vd->scope_next = fd->scopes[scope].first;
        }
    }

    /* if the function contains an eval call, the closure variables
       are used to compile the eval and they must be ordered by scope,
       so it is necessary to create the closure variables before any
       other variable lookup is done. */
    if (fd->has_eval_call)
        add_eval_variables(ctx, fd);

    /* add the module global variables in the closure */
    if (fd->module) {
        if (add_module_variables(ctx, fd))
            goto fail;
    }

    /* first create all the child functions */
    list_for_each_safe(el, el1, &fd->child_list) {
        JSFunctionDef *fd1;
        int cpool_idx;

        fd1 = list_entry(el, JSFunctionDef, link);
        cpool_idx = fd1->parent_cpool_idx;
        func_obj = js_create_function(ctx, fd1);
        if (JS_IsException(func_obj))
            goto fail;
        /* save it in the constant pool */
        assert(cpool_idx >= 0);
        fd->cpool[cpool_idx] = func_obj;
    }

#if defined(DUMP_BYTECODE) && (DUMP_BYTECODE & 4)
    if (!(fd->js_mode & JS_MODE_STRIP)) {
        printf("pass 1\n");
        dump_byte_code(ctx, 1, fd->byte_code.buf, fd->byte_code.size,
                       fd->args, fd->arg_count, fd->vars, fd->var_count,
                       fd->closure_var, fd->closure_var_count,
                       fd->cpool, fd->cpool_count, fd->source, fd->line_num,
                       fd->label_slots, NULL);
        printf("\n");
    }
#endif

    if (resolve_variables(ctx, fd))
        goto fail;

#if defined(DUMP_BYTECODE) && (DUMP_BYTECODE & 2)
    if (!(fd->js_mode & JS_MODE_STRIP)) {
        printf("pass 2\n");
        dump_byte_code(ctx, 2, fd->byte_code.buf, fd->byte_code.size,
                       fd->args, fd->arg_count, fd->vars, fd->var_count,
                       fd->closure_var, fd->closure_var_count,
                       fd->cpool, fd->cpool_count, fd->source, fd->line_num,
                       fd->label_slots, NULL);
        printf("\n");
    }
#endif

    if (resolve_labels(ctx, fd))
        goto fail;

    if (compute_stack_size(ctx, fd, &stack_size) < 0)
        goto fail;

    if (fd->js_mode & JS_MODE_STRIP) {
        function_size = offsetof(JSFunctionBytecode, debug);
    } else {
        function_size = sizeof(*b);
    }
    cpool_offset = function_size;
    function_size += fd->cpool_count * sizeof(*fd->cpool);
    vardefs_offset = function_size;
    if (!(fd->js_mode & JS_MODE_STRIP) || fd->has_eval_call) {
        function_size += (fd->arg_count + fd->var_count) * sizeof(*b->vardefs);
    }
    closure_var_offset = function_size;
    function_size += fd->closure_var_count * sizeof(*fd->closure_var);
    byte_code_offset = function_size;
    function_size += fd->byte_code.size;

    b = (JSFunctionBytecode*) js_mallocz(ctx, function_size);
    if (!b)
        goto fail;
    b->header.ref_count = 1;

    b->byte_code_buf = (uint8_t *)((uint8_t*)b + byte_code_offset);
    b->byte_code_len = fd->byte_code.size;
    memcpy(b->byte_code_buf, fd->byte_code.buf, fd->byte_code.size);
    js_free(ctx, fd->byte_code.buf);
    fd->byte_code.buf = NULL;

    b->func_name = fd->func_name;
    if (fd->arg_count + fd->var_count > 0) {
        if ((fd->js_mode & JS_MODE_STRIP) && !fd->has_eval_call) {
            /* Strip variable definitions not needed at runtime */
            int i;
            for(i = 0; i < fd->var_count; i++) {
                JS_FreeAtom(ctx, fd->vars[i].var_name);
            }
            for(i = 0; i < fd->arg_count; i++) {
                JS_FreeAtom(ctx, fd->args[i].var_name);
            }
            for(i = 0; i < fd->closure_var_count; i++) {
                JS_FreeAtom(ctx, fd->closure_var[i].var_name);
                fd->closure_var[i].var_name = JS_ATOM_NULL;
            }
        } else {
            b->vardefs = (JSVarDef*) ((uint8_t*)b + vardefs_offset);

            if (fd->arg_count != 0)
                memcpy(b->vardefs, fd->args, fd->arg_count * sizeof(fd->args[0]));

            if (fd->var_count != 0)
                memcpy(b->vardefs + fd->arg_count, fd->vars, fd->var_count * sizeof(fd->vars[0]));
        }
        b->var_count = fd->var_count;
        b->arg_count = fd->arg_count;
        b->defined_arg_count = fd->defined_arg_count;
        js_free(ctx, fd->args);
        js_free(ctx, fd->vars);
    }
    b->cpool_count = fd->cpool_count;
    if (b->cpool_count) {
        b->cpool = (JSValue*)((uint8_t*)b + cpool_offset);
        memcpy(b->cpool, fd->cpool, b->cpool_count * sizeof(*b->cpool));
    }
    js_free(ctx, fd->cpool);
    fd->cpool = NULL;

    b->stack_size = stack_size;

    if (fd->js_mode & JS_MODE_STRIP) {
        JS_FreeAtom(ctx, fd->filename);
        dbuf_free(&fd->pc2line);    // probably useless
    } else {
        /* XXX: source and pc2line info should be packed at the end of the
           JSFunctionBytecode structure, avoiding allocation overhead
         */
        b->has_debug = 1;
        b->debug.filename = fd->filename;
        b->debug.line_num = fd->line_num;

        //DynBuf pc2line;
        //compute_pc2line_info(fd, &pc2line);
        //js_free(ctx, fd->line_number_slots)
        b->debug.pc2line_buf = (uint8_t*) js_realloc(ctx, fd->pc2line.buf, fd->pc2line.size);
        if (!b->debug.pc2line_buf)
            b->debug.pc2line_buf = fd->pc2line.buf;
        b->debug.pc2line_len = fd->pc2line.size;
        b->debug.source = fd->source;
        b->debug.source_len = fd->source_len;
    }
    if (fd->scopes != fd->def_scope_array)
        js_free(ctx, fd->scopes);

    b->closure_var_count = fd->closure_var_count;
    if (b->closure_var_count) {
        b->closure_var = (JSClosureVar*) ((uint8_t*)b + closure_var_offset);
        memcpy(b->closure_var, fd->closure_var, b->closure_var_count * sizeof(*b->closure_var));
    }
    js_free(ctx, fd->closure_var);
    fd->closure_var = NULL;

    b->has_prototype = fd->has_prototype;
    b->has_simple_parameter_list = fd->has_simple_parameter_list;
    b->js_mode = fd->js_mode;
    b->is_derived_class_constructor = fd->is_derived_class_constructor;
    b->func_kind = fd->func_kind;
    b->need_home_object = (fd->home_object_var_idx >= 0 ||
                           fd->need_home_object);
    b->new_target_allowed = fd->new_target_allowed;
    b->super_call_allowed = fd->super_call_allowed;
    b->super_allowed = fd->super_allowed;
    b->arguments_allowed = fd->arguments_allowed;
    b->backtrace_barrier = fd->backtrace_barrier;
    b->realm = JS_DupContext(ctx);

    add_gc_object(ctx->rt, &b->header, JS_GC_OBJ_TYPE_FUNCTION_BYTECODE);

#if defined(DUMP_BYTECODE) && (DUMP_BYTECODE & 1)
    if (!(fd->js_mode & JS_MODE_STRIP)) {
        js_dump_function_bytecode(ctx, b);
    }
#endif

    if (fd->parent) {
        /* remove from parent list */
        list_del(&fd->link);
    }

    js_free(ctx, fd);
    return JS_MKPTR(JS_TAG_FUNCTION_BYTECODE, b);
 fail:
    js_free_function_def(ctx, fd);
    return JS_EXCEPTION;
}

static void free_function_bytecode(JSRuntime *rt, JSFunctionBytecode *b)
{
    int i;

#if 0
    {
        char buf[ATOM_GET_STR_BUF_SIZE];
        printf("freeing %s\n",
               JS_AtomGetStrRT(rt, buf, sizeof(buf), b->func_name));
    }
#endif
    free_bytecode_atoms(rt, b->byte_code_buf, b->byte_code_len, TRUE);

    if (b->vardefs) {
        for(i = 0; i < b->arg_count + b->var_count; i++) {
            JS_FreeAtomRT(rt, b->vardefs[i].var_name);
        }
    }
    for(i = 0; i < b->cpool_count; i++)
        JS_FreeValueRT(rt, b->cpool[i]);

    for(i = 0; i < b->closure_var_count; i++) {
        JSClosureVar *cv = &b->closure_var[i];
        JS_FreeAtomRT(rt, cv->var_name);
    }
    if (b->realm)
        JS_FreeContext(b->realm);

    JS_FreeAtomRT(rt, b->func_name);
    if (b->has_debug) {
        JS_FreeAtomRT(rt, b->debug.filename);
        js_free_rt(rt, b->debug.pc2line_buf);
        js_free_rt(rt, b->debug.source);
    }

    remove_gc_object(&b->header);
    if (rt->gc_phase == JS_GC_PHASE_REMOVE_CYCLES && b->header.ref_count != 0) {
        list_add_tail(&b->header.link, &rt->gc_zero_ref_count_list);
    } else {
        js_free_rt(rt, b);
    }
}

[[nodiscard]] static int js_parse_directives(JSParseState *s)
{
    char str[20];
    JSParsePos pos;
    BOOL has_semi;

    if (s->token.val != TOK_STRING)
        return 0;

    js_parse_get_pos(s, &pos);

    while(s->token.val == TOK_STRING) {
        /* Copy actual source string representation */
        snprintf(str, sizeof str, "%.*s",
                 (int)(s->buf_ptr - s->token.ptr - 2), s->token.ptr + 1);

        if (next_token(s))
            return -1;

        has_semi = FALSE;
        switch (s->token.val) {
        case ';':
            if (next_token(s))
                return -1;
            has_semi = TRUE;
            break;
        case '}':
        case TOK_EOF:
            has_semi = TRUE;
            break;
        case TOK_NUMBER:
        case TOK_STRING:
        case TOK_TEMPLATE:
        case TOK_IDENT:
        case TOK_REGEXP:
        case TOK_DEC:
        case TOK_INC:
        case TOK_NULL:
        case TOK_FALSE:
        case TOK_TRUE:
        case TOK_IF:
        case TOK_RETURN:
        case TOK_VAR:
        case TOK_THIS:
        case TOK_DELETE:
        case TOK_TYPEOF:
        case TOK_NEW:
        case TOK_DO:
        case TOK_WHILE:
        case TOK_FOR:
        case TOK_SWITCH:
        case TOK_THROW:
        case TOK_TRY:
        case TOK_FUNCTION:
        case TOK_DEBUGGER:
        case TOK_WITH:
        case TOK_CLASS:
        case TOK_CONST:
        case TOK_ENUM:
        case TOK_EXPORT:
        case TOK_IMPORT:
        case TOK_SUPER:
        case TOK_INTERFACE:
        case TOK_LET:
        case TOK_PACKAGE:
        case TOK_PRIVATE:
        case TOK_PROTECTED:
        case TOK_PUBLIC:
        case TOK_STATIC:
            /* automatic insertion of ';' */
            if (s->got_lf)
                has_semi = TRUE;
            break;
        default:
            break;
        }
        if (!has_semi)
            break;
        if (!strcmp(str, "use strict")) {
            s->cur_func->has_use_strict = TRUE;
            s->cur_func->js_mode |= JS_MODE_STRICT;
        }
#if !defined(DUMP_BYTECODE) || !(DUMP_BYTECODE & 8)
        else if (!strcmp(str, "use strip")) {
            s->cur_func->js_mode |= JS_MODE_STRIP;
        }
#endif
#ifdef CONFIG_BIGNUM
        else if (s->ctx->bignum_ext && !strcmp(str, "use math")) {
            s->cur_func->js_mode |= JS_MODE_MATH;
        }
#endif
    }
    return js_parse_seek_token(s, &pos);
}

static int js_parse_function_check_names(JSParseState *s, JSFunctionDef *fd,
                                         JSAtom func_name)
{
    JSAtom name;
    int i, idx;

    if (fd->js_mode & JS_MODE_STRICT) {
        if (!fd->has_simple_parameter_list && fd->has_use_strict) {
            return js_parse_error(s, "\"use strict\" not allowed in function with default or destructuring parameter");
        }
        if (func_name == JS_ATOM_eval || func_name == JS_ATOM_arguments) {
            return js_parse_error(s, "invalid function name in strict code");
        }
        for (idx = 0; idx < fd->arg_count; idx++) {
            name = fd->args[idx].var_name;

            if (name == JS_ATOM_eval || name == JS_ATOM_arguments) {
                return js_parse_error(s, "invalid argument name in strict code");
            }
        }
    }
    /* check async_generator case */
    if ((fd->js_mode & JS_MODE_STRICT)
    ||  !fd->has_simple_parameter_list
    ||  (fd->func_type == JS_PARSE_FUNC_METHOD && fd->func_kind == JS_FUNC_ASYNC)
    ||  fd->func_type == JS_PARSE_FUNC_ARROW
    ||  fd->func_type == JS_PARSE_FUNC_METHOD) {
        for (idx = 0; idx < fd->arg_count; idx++) {
            name = fd->args[idx].var_name;
            if (name != JS_ATOM_NULL) {
                for (i = 0; i < idx; i++) {
                    if (fd->args[i].var_name == name)
                        goto duplicate;
                }
                /* Check if argument name duplicates a destructuring parameter */
                /* XXX: should have a flag for such variables */
                for (i = 0; i < fd->var_count; i++) {
                    if (fd->vars[i].var_name == name &&
                        fd->vars[i].scope_level == 0)
                        goto duplicate;
                }
            }
        }
    }
    return 0;

duplicate:
    return js_parse_error(s, "duplicate argument names not allowed in this context");
}

/* create a function to initialize class fields */
static JSFunctionDef *js_parse_function_class_fields_init(JSParseState *s)
{
    JSFunctionDef *fd;

    fd = js_new_function_def(s->ctx, s->cur_func, FALSE, FALSE,
                             s->filename, 0);
    if (!fd)
        return NULL;
    fd->func_name = JS_ATOM_NULL;
    fd->has_prototype = FALSE;
    fd->has_home_object = TRUE;

    fd->has_arguments_binding = FALSE;
    fd->has_this_binding = TRUE;
    fd->is_derived_class_constructor = FALSE;
    fd->new_target_allowed = TRUE;
    fd->super_call_allowed = FALSE;
    fd->super_allowed = fd->has_home_object;
    fd->arguments_allowed = FALSE;

    fd->func_kind = JS_FUNC_NORMAL;
    fd->func_type = JS_PARSE_FUNC_METHOD;
    return fd;
}

/* func_name must be JS_ATOM_NULL for JS_PARSE_FUNC_STATEMENT and
   JS_PARSE_FUNC_EXPR, JS_PARSE_FUNC_ARROW and JS_PARSE_FUNC_VAR */
[[nodiscard]] static int js_parse_function_decl2(JSParseState *s,
                                               JSParseFunctionEnum func_type,
                                               JSFunctionKindEnum func_kind,
                                               JSAtom func_name,
                                               const uint8_t *ptr,
                                               int function_line_num,
                                               JSParseExportEnum export_flag,
                                               JSFunctionDef **pfd)
{
    JSContext *ctx = s->ctx;
    JSFunctionDef *fd = s->cur_func;
    BOOL is_expr;
    int func_idx, lexical_func_idx = -1;
    BOOL has_opt_arg;
    BOOL create_func_var = FALSE;

    is_expr = (func_type != JS_PARSE_FUNC_STATEMENT &&
               func_type != JS_PARSE_FUNC_VAR);

    if (func_type == JS_PARSE_FUNC_STATEMENT ||
        func_type == JS_PARSE_FUNC_VAR ||
        func_type == JS_PARSE_FUNC_EXPR) {
        if (func_kind == JS_FUNC_NORMAL &&
            token_is_pseudo_keyword(s, JS_ATOM_async) &&
            peek_token(s, TRUE) != '\n') {
            if (next_token(s))
                return -1;
            func_kind = JS_FUNC_ASYNC;
        }
        if (next_token(s))
            return -1;
        if (s->token.val == '*') {
            if (next_token(s))
                return -1;
            func_kind = (JSFunctionKindEnum) (func_kind | JS_FUNC_GENERATOR);
        }

        if (s->token.val == TOK_IDENT) {
            if (s->token.u.ident.is_reserved ||
                (s->token.u.ident.atom == JS_ATOM_yield &&
                 func_type == JS_PARSE_FUNC_EXPR &&
                 (func_kind & JS_FUNC_GENERATOR)) ||
                (s->token.u.ident.atom == JS_ATOM_await &&
                 func_type == JS_PARSE_FUNC_EXPR &&
                 (func_kind & JS_FUNC_ASYNC))) {
                return js_parse_error_reserved_identifier(s);
            }
        }
        if (s->token.val == TOK_IDENT ||
            (((s->token.val == TOK_YIELD && !(fd->js_mode & JS_MODE_STRICT)) ||
             (s->token.val == TOK_AWAIT && !s->is_module)) &&
             func_type == JS_PARSE_FUNC_EXPR)) {
            func_name = JS_DupAtom(ctx, s->token.u.ident.atom);
            if (next_token(s)) {
                JS_FreeAtom(ctx, func_name);
                return -1;
            }
        } else {
            if (func_type != JS_PARSE_FUNC_EXPR &&
                export_flag != JS_PARSE_EXPORT_DEFAULT) {
                return js_parse_error(s, "function name expected");
            }
        }
    } else if (func_type != JS_PARSE_FUNC_ARROW) {
        func_name = JS_DupAtom(ctx, func_name);
    }

    if (fd->is_eval && fd->eval_type == JS_EVAL_TYPE_MODULE &&
        (func_type == JS_PARSE_FUNC_STATEMENT || func_type == JS_PARSE_FUNC_VAR)) {
        JSGlobalVar *hf;
        hf = find_global_var(fd, func_name);
        /* XXX: should check scope chain */
        if (hf && hf->scope_level == fd->scope_level) {
            js_parse_error(s, "invalid redefinition of global identifier in module code");
            JS_FreeAtom(ctx, func_name);
            return -1;
        }
    }

    if (func_type == JS_PARSE_FUNC_VAR) {
        if (!(fd->js_mode & JS_MODE_STRICT)
        && func_kind == JS_FUNC_NORMAL
        &&  find_lexical_decl(ctx, fd, func_name, fd->scope_first, FALSE) < 0
        &&  !((func_idx = find_var(ctx, fd, func_name)) >= 0 && (func_idx & ARGUMENT_VAR_OFFSET))
        &&  !(func_name == JS_ATOM_arguments && fd->has_arguments_binding)) {
            create_func_var = TRUE;
        }
        /* Create the lexical name here so that the function closure
           contains it */
        if (fd->is_eval &&
            (fd->eval_type == JS_EVAL_TYPE_GLOBAL ||
             fd->eval_type == JS_EVAL_TYPE_MODULE) &&
            fd->scope_level == fd->body_scope) {
            /* avoid creating a lexical variable in the global
               scope. XXX: check annex B */
            JSGlobalVar *hf;
            hf = find_global_var(fd, func_name);
            /* XXX: should check scope chain */
            if (hf && hf->scope_level == fd->scope_level) {
                js_parse_error(s, "invalid redefinition of global identifier");
                JS_FreeAtom(ctx, func_name);
                return -1;
            }
        } else {
            /* Always create a lexical name, fail if at the same scope as
               existing name */
            /* Lexical variable will be initialized upon entering scope */
            lexical_func_idx = define_var(s, fd, func_name,
                                          func_kind != JS_FUNC_NORMAL ?
                                          JS_VAR_DEF_NEW_FUNCTION_DECL :
                                          JS_VAR_DEF_FUNCTION_DECL);
            if (lexical_func_idx < 0) {
                JS_FreeAtom(ctx, func_name);
                return -1;
            }
        }
    }

    fd = js_new_function_def(ctx, fd, FALSE, is_expr,
                             s->filename, function_line_num);
    if (!fd) {
        JS_FreeAtom(ctx, func_name);
        return -1;
    }
    if (pfd)
        *pfd = fd;
    s->cur_func = fd;
    fd->func_name = func_name;
    /* XXX: test !fd->is_generator is always false */
    fd->has_prototype = (func_type == JS_PARSE_FUNC_STATEMENT ||
                         func_type == JS_PARSE_FUNC_VAR ||
                         func_type == JS_PARSE_FUNC_EXPR) &&
                        func_kind == JS_FUNC_NORMAL;
    fd->has_home_object = (func_type == JS_PARSE_FUNC_METHOD ||
                           func_type == JS_PARSE_FUNC_GETTER ||
                           func_type == JS_PARSE_FUNC_SETTER ||
                           func_type == JS_PARSE_FUNC_CLASS_CONSTRUCTOR ||
                           func_type == JS_PARSE_FUNC_DERIVED_CLASS_CONSTRUCTOR);
    fd->has_arguments_binding = (func_type != JS_PARSE_FUNC_ARROW);
    fd->has_this_binding = fd->has_arguments_binding;
    fd->is_derived_class_constructor = (func_type == JS_PARSE_FUNC_DERIVED_CLASS_CONSTRUCTOR);
    if (func_type == JS_PARSE_FUNC_ARROW) {
        fd->new_target_allowed = fd->parent->new_target_allowed;
        fd->super_call_allowed = fd->parent->super_call_allowed;
        fd->super_allowed = fd->parent->super_allowed;
        fd->arguments_allowed = fd->parent->arguments_allowed;
    } else {
        fd->new_target_allowed = TRUE;
        fd->super_call_allowed = fd->is_derived_class_constructor;
        fd->super_allowed = fd->has_home_object;
        fd->arguments_allowed = TRUE;
    }

    /* fd->in_function_body == FALSE prevents yield/await during the parsing
       of the arguments in generator/async functions. They are parsed as
       regular identifiers for other function kinds. */
    fd->func_kind = func_kind;
    fd->func_type = func_type;

    if (func_type == JS_PARSE_FUNC_CLASS_CONSTRUCTOR ||
        func_type == JS_PARSE_FUNC_DERIVED_CLASS_CONSTRUCTOR) {
        /* error if not invoked as a constructor */
        emit_op(s, OP_check_ctor);
    }

    if (func_type == JS_PARSE_FUNC_CLASS_CONSTRUCTOR) {
        emit_class_field_init(s);
    }

    /* parse arguments */
    fd->has_simple_parameter_list = TRUE;
    fd->has_parameter_expressions = FALSE;
    has_opt_arg = FALSE;
    if (func_type == JS_PARSE_FUNC_ARROW && s->token.val == TOK_IDENT) {
        JSAtom name;
        if (s->token.u.ident.is_reserved) {
            js_parse_error_reserved_identifier(s);
            goto fail;
        }
        name = s->token.u.ident.atom;
        if (add_arg(ctx, fd, name) < 0)
            goto fail;
        fd->defined_arg_count = 1;
    } else {
        if (s->token.val == '(') {
            int skip_bits;
            /* if there is an '=' inside the parameter list, we
               consider there is a parameter expression inside */
            js_parse_skip_parens_token(s, &skip_bits, FALSE);
            if (skip_bits & SKIP_HAS_ASSIGNMENT)
                fd->has_parameter_expressions = TRUE;
            if (next_token(s))
                goto fail;
        } else {
            if (js_parse_expect(s, '('))
                goto fail;
        }

        if (fd->has_parameter_expressions) {
            fd->scope_level = -1; /* force no parent scope */
            if (push_scope(s) < 0)
                return -1;
        }

        while (s->token.val != ')') {
            JSAtom name;
            BOOL rest = FALSE;
            int idx, has_initializer;

            if (s->token.val == TOK_ELLIPSIS) {
                fd->has_simple_parameter_list = FALSE;
                rest = TRUE;
                if (next_token(s))
                    goto fail;
            }
            if (s->token.val == '[' || s->token.val == '{') {
                fd->has_simple_parameter_list = FALSE;
                if (rest) {
                    emit_op(s, OP_rest);
                    emit_u16(s, fd->arg_count);
                } else {
                    /* unnamed arg for destructuring */
                    idx = add_arg(ctx, fd, JS_ATOM_NULL);
                    emit_op(s, OP_get_arg);
                    emit_u16(s, idx);
                }
                has_initializer = js_parse_destructuring_element(s, fd->has_parameter_expressions ? TOK_LET : TOK_VAR, 1, TRUE, -1, TRUE);
                if (has_initializer < 0)
                    goto fail;
                if (has_initializer)
                    has_opt_arg = TRUE;
                if (!has_opt_arg)
                    fd->defined_arg_count++;
            } else if (s->token.val == TOK_IDENT) {
                if (s->token.u.ident.is_reserved) {
                    js_parse_error_reserved_identifier(s);
                    goto fail;
                }
                name = s->token.u.ident.atom;
                if (name == JS_ATOM_yield && fd->func_kind == JS_FUNC_GENERATOR) {
                    js_parse_error_reserved_identifier(s);
                    goto fail;
                }
                if (fd->has_parameter_expressions) {
                    if (define_var(s, fd, name, JS_VAR_DEF_LET) < 0)
                        goto fail;
                }
                /* XXX: could avoid allocating an argument if rest is true */
                idx = add_arg(ctx, fd, name);
                if (idx < 0)
                    goto fail;
                if (next_token(s))
                    goto fail;
                if (rest) {
                    emit_op(s, OP_rest);
                    emit_u16(s, idx);
                    if (fd->has_parameter_expressions) {
                        emit_op(s, OP_dup);
                        emit_op(s, OP_scope_put_var_init);
                        emit_atom(s, name);
                        emit_u16(s, fd->scope_level);
                    }
                    emit_op(s, OP_put_arg);
                    emit_u16(s, idx);
                    fd->has_simple_parameter_list = FALSE;
                    has_opt_arg = TRUE;
                } else if (s->token.val == '=') {
                    int label;

                    fd->has_simple_parameter_list = FALSE;
                    has_opt_arg = TRUE;

                    if (next_token(s))
                        goto fail;

                    label = new_label(s);
                    emit_op(s, OP_get_arg);
                    emit_u16(s, idx);
                    emit_op(s, OP_dup);
                    emit_op(s, OP_undefined);
                    emit_op(s, OP_strict_eq);
                    emit_goto(s, OP_if_false, label);
                    emit_op(s, OP_drop);
                    if (js_parse_assign_expr(s))
                        goto fail;
                    set_object_name(s, name);
                    emit_op(s, OP_dup);
                    emit_op(s, OP_put_arg);
                    emit_u16(s, idx);
                    emit_label(s, label);
                    emit_op(s, OP_scope_put_var_init);
                    emit_atom(s, name);
                    emit_u16(s, fd->scope_level);
                } else {
                    if (!has_opt_arg) {
                        fd->defined_arg_count++;
                    }
                    if (fd->has_parameter_expressions) {
                        /* copy the argument to the argument scope */
                        emit_op(s, OP_get_arg);
                        emit_u16(s, idx);
                        emit_op(s, OP_scope_put_var_init);
                        emit_atom(s, name);
                        emit_u16(s, fd->scope_level);
                    }
                }
            } else {
                js_parse_error(s, "missing formal parameter");
                goto fail;
            }
            if (rest && s->token.val != ')') {
                js_parse_expect(s, ')');
                goto fail;
            }
            if (s->token.val == ')')
                break;
            if (js_parse_expect(s, ','))
                goto fail;
        }
        if ((func_type == JS_PARSE_FUNC_GETTER && fd->arg_count != 0) ||
            (func_type == JS_PARSE_FUNC_SETTER && fd->arg_count != 1)) {
            js_parse_error(s, "invalid number of arguments for getter or setter");
            goto fail;
        }
    }

    if (fd->has_parameter_expressions) {
        int idx;

        /* Copy the variables in the argument scope to the variable
           scope (see FunctionDeclarationInstantiation() in spec). The
           normal arguments are already present, so no need to copy
           them. */
        idx = fd->scopes[fd->scope_level].first;
        while (idx >= 0) {
            JSVarDef *vd = &fd->vars[idx];
            if (vd->scope_level != fd->scope_level)
                break;
            if (find_var(ctx, fd, vd->var_name) < 0) {
                if (add_var(ctx, fd, vd->var_name) < 0)
                    goto fail;
                vd = &fd->vars[idx]; /* fd->vars may have been reallocated */
                emit_op(s, OP_scope_get_var);
                emit_atom(s, vd->var_name);
                emit_u16(s, fd->scope_level);
                emit_op(s, OP_scope_put_var);
                emit_atom(s, vd->var_name);
                emit_u16(s, 0);
            }
            idx = vd->scope_next;
        }

        /* the argument scope has no parent, hence we don't use pop_scope(s) */
        emit_op(s, OP_leave_scope);
        emit_u16(s, fd->scope_level);

        /* set the variable scope as the current scope */
        fd->scope_level = 0;
        fd->scope_first = fd->scopes[fd->scope_level].first;
    }

    if (next_token(s))
        goto fail;

    /* generator function: yield after the parameters are evaluated */
    if (func_kind == JS_FUNC_GENERATOR ||
        func_kind == JS_FUNC_ASYNC_GENERATOR)
        emit_op(s, OP_initial_yield);

    /* in generators, yield expression is forbidden during the parsing
       of the arguments */
    fd->in_function_body = TRUE;
    push_scope(s);  /* enter body scope */
    fd->body_scope = fd->scope_level;

    if (s->token.val == TOK_ARROW) {
        if (next_token(s))
            goto fail;

        if (s->token.val != '{') {
            if (js_parse_function_check_names(s, fd, func_name))
                goto fail;

            if (js_parse_assign_expr(s))
                goto fail;

            if (func_kind != JS_FUNC_NORMAL)
                emit_op(s, OP_return_async);
            else
                emit_op(s, OP_return);

            if (!(fd->js_mode & JS_MODE_STRIP)) {
                /* save the function source code */
                /* the end of the function source code is after the last
                   token of the function source stored into s->last_ptr */
                fd->source_len = s->last_ptr - ptr;
                fd->source = js_strndup(ctx, (const char *)ptr, fd->source_len);
                if (!fd->source)
                    goto fail;
            }
            goto done;
        }
    }

    if (js_parse_expect(s, '{'))
        goto fail;

    if (js_parse_directives(s))
        goto fail;

    /* in strict_mode, check function and argument names */
    if (js_parse_function_check_names(s, fd, func_name))
        goto fail;

    while (s->token.val != '}') {
        if (js_parse_source_element(s))
            goto fail;
    }
    if (!(fd->js_mode & JS_MODE_STRIP)) {
        /* save the function source code */
        fd->source_len = s->buf_ptr - ptr;
        fd->source = js_strndup(ctx, (const char *)ptr, fd->source_len);
        if (!fd->source)
            goto fail;
    }

    if (next_token(s)) {
        /* consume the '}' */
        goto fail;
    }

    /* in case there is no return, add one */
    if (js_is_live_code(s)) {
        emit_return(s, FALSE);
    }
done:
    s->cur_func = fd->parent;

    /* create the function object */
    {
        int idx;
        JSAtom func_name = fd->func_name;

        /* the real object will be set at the end of the compilation */
        idx = cpool_add(s, JS_NULL);
        fd->parent_cpool_idx = idx;

        if (is_expr) {
            /* for constructors, no code needs to be generated here */
            if (func_type != JS_PARSE_FUNC_CLASS_CONSTRUCTOR &&
                func_type != JS_PARSE_FUNC_DERIVED_CLASS_CONSTRUCTOR) {
                /* OP_fclosure creates the function object from the bytecode
                   and adds the scope information */
                emit_op(s, OP_fclosure);
                emit_u32(s, idx);
                if (func_name == JS_ATOM_NULL) {
                    emit_op(s, OP_set_name);
                    emit_u32(s, JS_ATOM_NULL);
                }
            }
        } else if (func_type == JS_PARSE_FUNC_VAR) {
            emit_op(s, OP_fclosure);
            emit_u32(s, idx);
            if (create_func_var) {
                if (s->cur_func->is_global_var) {
                    JSGlobalVar *hf;
                    /* the global variable must be defined at the start of the
                       function */
                    hf = add_global_var(ctx, s->cur_func, func_name);
                    if (!hf)
                        goto fail;
                    /* it is considered as defined at the top level
                       (needed for annex B.3.3.4 and B.3.3.5
                       checks) */
                    hf->scope_level = 0;
                    hf->force_init = ((s->cur_func->js_mode & JS_MODE_STRICT) != 0);
                    /* store directly into global var, bypass lexical scope */
                    emit_op(s, OP_dup);
                    emit_op(s, OP_scope_put_var);
                    emit_atom(s, func_name);
                    emit_u16(s, 0);
                } else {
                    /* do not call define_var to bypass lexical scope check */
                    func_idx = find_var(ctx, s->cur_func, func_name);
                    if (func_idx < 0) {
                        func_idx = add_var(ctx, s->cur_func, func_name);
                        if (func_idx < 0)
                            goto fail;
                    }
                    /* store directly into local var, bypass lexical catch scope */
                    emit_op(s, OP_dup);
                    emit_op(s, OP_scope_put_var);
                    emit_atom(s, func_name);
                    emit_u16(s, 0);
                }
            }
            if (lexical_func_idx >= 0) {
                /* lexical variable will be initialized upon entering scope */
                s->cur_func->vars[lexical_func_idx].func_pool_idx = idx;
                emit_op(s, OP_drop);
            } else {
                /* store function object into its lexical name */
                /* XXX: could use OP_put_loc directly */
                emit_op(s, OP_scope_put_var_init);
                emit_atom(s, func_name);
                emit_u16(s, s->cur_func->scope_level);
            }
        } else {
            if (!s->cur_func->is_global_var) {
                int var_idx = define_var(s, s->cur_func, func_name, JS_VAR_DEF_VAR);

                if (var_idx < 0)
                    goto fail;
                /* the variable will be assigned at the top of the function */
                if (var_idx & ARGUMENT_VAR_OFFSET) {
                    s->cur_func->args[var_idx - ARGUMENT_VAR_OFFSET].func_pool_idx = idx;
                } else {
                    s->cur_func->vars[var_idx].func_pool_idx = idx;
                }
            } else {
                JSAtom func_var_name;
                JSGlobalVar *hf;
                if (func_name == JS_ATOM_NULL)
                    func_var_name = JS_ATOM__default_; /* export default */
                else
                    func_var_name = func_name;
                /* the variable will be assigned at the top of the function */
                hf = add_global_var(ctx, s->cur_func, func_var_name);
                if (!hf)
                    goto fail;
                hf->cpool_idx = idx;
                if (export_flag != JS_PARSE_EXPORT_NONE) {
                    if (!add_export_entry(s, s->cur_func->module, func_var_name,
                                          export_flag == JS_PARSE_EXPORT_NAMED ? func_var_name : JS_ATOM_default, JS_EXPORT_TYPE_LOCAL))
                        goto fail;
                }
            }
        }
    }
    return 0;
 fail:
    s->cur_func = fd->parent;
    js_free_function_def(ctx, fd);
    if (pfd)
        *pfd = NULL;
    return -1;
}

[[nodiscard]] static int js_parse_function_decl(JSParseState *s,
                                              JSParseFunctionEnum func_type,
                                              JSFunctionKindEnum func_kind,
                                              JSAtom func_name,
                                              const uint8_t *ptr,
                                              int function_line_num)
{
    return js_parse_function_decl2(s, func_type, func_kind, func_name, ptr,
                                   function_line_num, JS_PARSE_EXPORT_NONE,
                                   NULL);
}

[[nodiscard]] static int js_parse_program(JSParseState *s)
{
    JSFunctionDef *fd = s->cur_func;
    int idx;

    if (next_token(s))
        return -1;

    if (js_parse_directives(s))
        return -1;

    fd->is_global_var = (fd->eval_type == JS_EVAL_TYPE_GLOBAL) ||
        (fd->eval_type == JS_EVAL_TYPE_MODULE) ||
        !(fd->js_mode & JS_MODE_STRICT);

    if (!s->is_module) {
        /* hidden variable for the return value */
        fd->eval_ret_idx = idx = add_var(s->ctx, fd, JS_ATOM__ret_);
        if (idx < 0)
            return -1;
    }

    while (s->token.val != TOK_EOF) {
        if (js_parse_source_element(s))
            return -1;
    }

    if (!s->is_module) {
        /* return the value of the hidden variable eval_ret_idx  */
        emit_op(s, OP_get_loc);
        emit_u16(s, fd->eval_ret_idx);

        emit_op(s, OP_return);
    } else {
        emit_op(s, OP_return_undef);
    }

    return 0;
}

static void js_parse_init(JSContext *ctx, JSParseState *s,
                          const char *input, size_t input_len,
                          const char *filename)
{
    memset(s, 0, sizeof(*s));
    s->ctx = ctx;
    s->filename = filename;
    s->line_num = 1;
    s->buf_ptr = (const uint8_t *)input;
    s->buf_end = s->buf_ptr + input_len;
    s->token.val = ' ';
    s->token.line_num = 1;
}

static JSValue JS_EvalFunctionInternal(JSContext *ctx, JSValue fun_obj,
                                       JSValueConst this_obj,
                                       JSVarRef **var_refs, JSStackFrame *sf)
{
    JSValue ret_val;
    uint32_t tag;

    tag = JS_VALUE_GET_TAG(fun_obj);
    if (tag == JS_TAG_FUNCTION_BYTECODE) {
        fun_obj = js_closure(ctx, fun_obj, var_refs, sf);
        ret_val = JS_CallFree(ctx, fun_obj, this_obj, 0, NULL);
    } else if (tag == JS_TAG_MODULE) {
        JSModuleDef *m;
        m = (JSModuleDef*) JS_VALUE_GET_PTR(fun_obj);
        /* the module refcount should be >= 2 */
        JS_FreeValue(ctx, fun_obj);
        if (js_create_module_function(ctx, m) < 0)
            goto fail;
        if (js_link_module(ctx, m) < 0)
            goto fail;
        ret_val = js_evaluate_module(ctx, m);
        if (JS_IsException(ret_val)) {
        fail:
            js_free_modules(ctx, JS_FREE_MODULE_NOT_EVALUATED);
            return JS_EXCEPTION;
        }
    } else {
        JS_FreeValue(ctx, fun_obj);
        ret_val = JS_ThrowTypeError(ctx, "bytecode function expected");
    }
    return ret_val;
}

inline JSValue JS_EvalFunction(JSContext *ctx, JSValue fun_obj)
{
    return JS_EvalFunctionInternal(ctx, fun_obj, ctx->global_obj, NULL, NULL);
}

static void skip_shebang(JSParseState *s)
{
    const uint8_t *p = s->buf_ptr;
    int c;

    if (p[0] == '#' && p[1] == '!') {
        p += 2;
        while (p < s->buf_end) {
            if (*p == '\n' || *p == '\r') {
                break;
            } else if (*p >= 0x80) {
                c = unicode_from_utf8(p, UTF8_CHAR_LEN_MAX, &p);
                if (c == CP_LS || c == CP_PS) {
                    break;
                } else if (c == -1) {
                    p++; /* skip invalid UTF-8 */
                }
            } else {
                p++;
            }
        }
        s->buf_ptr = p;
    }
}

/* 'input' must be zero terminated i.e. input[input_len] = '\0'. */
static JSValue __JS_EvalInternal(JSContext *ctx, JSValueConst this_obj,
                                 const char *input, size_t input_len,
                                 const char *filename, int flags, int scope_idx)
{
    JSParseState s1, *s = &s1;
    int err, js_mode, eval_type;
    JSValue fun_obj, ret_val;
    JSStackFrame *sf;
    JSVarRef **var_refs;
    JSFunctionBytecode *b;
    JSFunctionDef *fd;
    JSModuleDef *m;

    js_parse_init(ctx, s, input, input_len, filename);
    skip_shebang(s);

    eval_type = flags & JS_EVAL_TYPE_MASK;
    m = NULL;
    if (eval_type == JS_EVAL_TYPE_DIRECT) {
        JSObject *p;
        sf = ctx->rt->current_stack_frame;
        assert(sf != NULL);
        assert(JS_VALUE_GET_TAG(sf->cur_func) == JS_TAG_OBJECT);
        p = JS_VALUE_GET_OBJ(sf->cur_func);
        assert(js_class_has_bytecode(p->class_id));
        b = p->u.func.function_bytecode;
        var_refs = p->u.func.var_refs;
        js_mode = b->js_mode;
    } else {
        sf = NULL;
        b = NULL;
        var_refs = NULL;
        js_mode = 0;
        if (flags & JS_EVAL_FLAG_STRICT)
            js_mode |= JS_MODE_STRICT;
        if (flags & JS_EVAL_FLAG_STRIP)
            js_mode |= JS_MODE_STRIP;
        if (eval_type == JS_EVAL_TYPE_MODULE) {
            JSAtom module_name = JS_NewAtom(ctx, filename);
            if (module_name == JS_ATOM_NULL)
                return JS_EXCEPTION;
            m = js_new_module_def(ctx, module_name);
            if (!m)
                return JS_EXCEPTION;
            js_mode |= JS_MODE_STRICT;
        }
    }
    fd = js_new_function_def(ctx, NULL, TRUE, FALSE, filename, 1);
    if (!fd)
        goto fail1;
    s->cur_func = fd;
    fd->eval_type = eval_type;
    fd->has_this_binding = (eval_type != JS_EVAL_TYPE_DIRECT);
    fd->backtrace_barrier = ((flags & JS_EVAL_FLAG_BACKTRACE_BARRIER) != 0);
    if (eval_type == JS_EVAL_TYPE_DIRECT) {
        fd->new_target_allowed = b->new_target_allowed;
        fd->super_call_allowed = b->super_call_allowed;
        fd->super_allowed = b->super_allowed;
        fd->arguments_allowed = b->arguments_allowed;
    } else {
        fd->new_target_allowed = FALSE;
        fd->super_call_allowed = FALSE;
        fd->super_allowed = FALSE;
        fd->arguments_allowed = TRUE;
    }
    fd->js_mode = js_mode;
    fd->func_name = JS_DupAtom(ctx, JS_ATOM__eval_);
    if (b) {
        if (add_closure_variables(ctx, fd, b, scope_idx))
            goto fail;
    }
    fd->module = m;
    s->is_module = (m != NULL);
    s->allow_html_comments = !s->is_module;

    push_scope(s); /* body scope */
    fd->body_scope = fd->scope_level;

    err = js_parse_program(s);
    if (err) {
    fail:
        free_token(s, &s->token);
        js_free_function_def(ctx, fd);
        goto fail1;
    }

    /* create the function object and all the enclosed functions */
    fun_obj = js_create_function(ctx, fd);
    if (JS_IsException(fun_obj))
        goto fail1;
    /* Could add a flag to avoid resolution if necessary */
    if (m) {
        m->func_obj = fun_obj;
        if (js_resolve_module(ctx, m) < 0)
            goto fail1;
        fun_obj = JS_DupValue(ctx, JS_MKPTR(JS_TAG_MODULE, m));
    }
    if (flags & JS_EVAL_FLAG_COMPILE_ONLY) {
        ret_val = fun_obj;
    } else {
        ret_val = JS_EvalFunctionInternal(ctx, fun_obj, this_obj, var_refs, sf);
    }
    return ret_val;
 fail1:
    /* XXX: should free all the unresolved dependencies */
    if (m)
        js_free_module_def(ctx, m);
    return JS_EXCEPTION;
}

/* the indirection is needed to make 'eval' optional */
static JSValue JS_EvalInternal(JSContext *ctx, JSValueConst this_obj,
                               const char *input, size_t input_len,
                               const char *filename, int flags, int scope_idx)
{
    if (js_unlikely(!ctx->eval_internal)) {
        return JS_ThrowTypeError(ctx, "eval is not supported");
    }
    return ctx->eval_internal(ctx, this_obj, input, input_len, filename,
                              flags, scope_idx);
}

static JSValue JS_EvalObject(JSContext *ctx, JSValueConst this_obj,
                             JSValueConst val, int flags, int scope_idx)
{
    JSValue ret;
    const char *str;
    size_t len;

    if (!JS_IsString(val))
        return JS_DupValue(ctx, val);
    str = JS_ToCStringLen(ctx, &len, val);
    if (!str)
        return JS_EXCEPTION;
    ret = JS_EvalInternal(ctx, this_obj, str, len, "<input>", flags, scope_idx);
    JS_FreeCString(ctx, str);
    return ret;

}

inline JSValue JS_EvalThis(JSContext *ctx, JSValueConst this_obj,
                    const char *input, size_t input_len,
                    const char *filename, int eval_flags)
{
    int eval_type = eval_flags & JS_EVAL_TYPE_MASK;
    JSValue ret;

    assert(eval_type == JS_EVAL_TYPE_GLOBAL ||
           eval_type == JS_EVAL_TYPE_MODULE);
    ret = JS_EvalInternal(ctx, this_obj, input, input_len, filename,
                          eval_flags, -1);
    return ret;
}

inline JSValue JS_Eval(JSContext *ctx, const char *input, size_t input_len,
                const char *filename, int eval_flags)
{
    return JS_EvalThis(ctx, ctx->global_obj, input, input_len, filename,
                       eval_flags);
}

inline int JS_ResolveModule(JSContext *ctx, JSValueConst obj)
{
    if (JS_VALUE_GET_TAG(obj) == JS_TAG_MODULE) {
        auto m = (JSModuleDef*) JS_VALUE_GET_PTR(obj);
        if (js_resolve_module(ctx, m) < 0) {
            js_free_modules(ctx, JS_FREE_MODULE_NOT_RESOLVED);
            return -1;
        }
    }
    return 0;
}

/*******************************************************************/
/* object list */

typedef struct {
    JSObject *obj;
    uint32_t hash_next; /* -1 if no next entry */
} JSObjectListEntry;

/* XXX: reuse it to optimize weak references */
typedef struct {
    JSObjectListEntry *object_tab;
    int object_count;
    int object_size;
    uint32_t *hash_table;
    uint32_t hash_size;
} JSObjectList;

static void js_object_list_init(JSObjectList *s)
{
    memset(s, 0, sizeof(*s));
}

static uint32_t js_object_list_get_hash(JSObject *p, uint32_t hash_size)
{
    return ((uintptr_t)p * 3163) & (hash_size - 1);
}

static int js_object_list_resize_hash(JSContext *ctx, JSObjectList *s,
                                 uint32_t new_hash_size)
{
    JSObjectListEntry *e;
    uint32_t i, h, *new_hash_table;

    new_hash_table = (uint32_t*) js_malloc(ctx, sizeof(new_hash_table[0]) * new_hash_size);
    if (!new_hash_table)
        return -1;
    js_free(ctx, s->hash_table);
    s->hash_table = new_hash_table;
    s->hash_size = new_hash_size;

    for(i = 0; i < s->hash_size; i++) {
        s->hash_table[i] = -1;
    }
    for(i = 0; i < s->object_count; i++) {
        e = &s->object_tab[i];
        h = js_object_list_get_hash(e->obj, s->hash_size);
        e->hash_next = s->hash_table[h];
        s->hash_table[h] = i;
    }
    return 0;
}

/* the reference count of 'obj' is not modified. Return 0 if OK, -1 if
   memory error */
static int js_object_list_add(JSContext *ctx, JSObjectList *s, JSObject *obj)
{
    JSObjectListEntry *e;
    uint32_t h, new_hash_size;

    if (js_resize_array(ctx, (void**)&s->object_tab,
                        sizeof(s->object_tab[0]),
                        &s->object_size, s->object_count + 1))
        return -1;
    if (js_unlikely((s->object_count + 1) >= s->hash_size)) {
        new_hash_size = max_uint32(s->hash_size, 4);
        while (new_hash_size <= s->object_count)
            new_hash_size *= 2;
        if (js_object_list_resize_hash(ctx, s, new_hash_size))
            return -1;
    }
    e = &s->object_tab[s->object_count++];
    h = js_object_list_get_hash(obj, s->hash_size);
    e->obj = obj;
    e->hash_next = s->hash_table[h];
    s->hash_table[h] = s->object_count - 1;
    return 0;
}

/* return -1 if not present or the object index */
static int js_object_list_find(JSContext *ctx, JSObjectList *s, JSObject *obj)
{
    JSObjectListEntry *e;
    uint32_t h, p;

    /* must test empty size because there is no hash table */
    if (s->object_count == 0)
        return -1;
    h = js_object_list_get_hash(obj, s->hash_size);
    p = s->hash_table[h];
    while (p != -1) {
        e = &s->object_tab[p];
        if (e->obj == obj)
            return p;
        p = e->hash_next;
    }
    return -1;
}

static void js_object_list_end(JSContext *ctx, JSObjectList *s)
{
    js_free(ctx, s->object_tab);
    js_free(ctx, s->hash_table);
}

/*******************************************************************/
/* binary object writer & reader */

typedef enum BCTagEnum {
    BC_TAG_NULL = 1,
    BC_TAG_UNDEFINED,
    BC_TAG_BOOL_FALSE,
    BC_TAG_BOOL_TRUE,
    BC_TAG_INT32,
    BC_TAG_FLOAT64,
    BC_TAG_STRING,
    BC_TAG_OBJECT,
    BC_TAG_ARRAY,
    BC_TAG_BIG_INT,
    BC_TAG_BIG_FLOAT,
    BC_TAG_BIG_DECIMAL,
    BC_TAG_TEMPLATE_OBJECT,
    BC_TAG_FUNCTION_BYTECODE,
    BC_TAG_MODULE,
    BC_TAG_TYPED_ARRAY,
    BC_TAG_ARRAY_BUFFER,
    BC_TAG_SHARED_ARRAY_BUFFER,
    BC_TAG_DATE,
    BC_TAG_OBJECT_VALUE,
    BC_TAG_OBJECT_REFERENCE,
} BCTagEnum;

#ifdef CONFIG_BIGNUM
#define BC_BASE_VERSION 2
#else
#define BC_BASE_VERSION 1
#endif
#define BC_BE_VERSION 0x40
#if CHOC_BIGENDIAN
#define BC_VERSION (BC_BASE_VERSION | BC_BE_VERSION)
#else
#define BC_VERSION BC_BASE_VERSION
#endif

typedef struct BCWriterState {
    JSContext *ctx;
    DynBuf dbuf;
    BOOL byte_swap : 8;
    BOOL allow_bytecode : 8;
    BOOL allow_sab : 8;
    BOOL allow_reference : 8;
    uint32_t first_atom;
    uint32_t *atom_to_idx;
    int atom_to_idx_size;
    JSAtom *idx_to_atom;
    int idx_to_atom_count;
    int idx_to_atom_size;
    uint8_t **sab_tab;
    int sab_tab_len;
    int sab_tab_size;
    /* list of referenced objects (used if allow_reference = TRUE) */
    JSObjectList object_list;
} BCWriterState;

#ifdef DUMP_READ_OBJECT
static const char * const bc_tag_str[] = {
    "invalid",
    "null",
    "undefined",
    "false",
    "true",
    "int32",
    "float64",
    "string",
    "object",
    "array",
    "bigint",
    "bigfloat",
    "bigdecimal",
    "template",
    "function",
    "module",
    "TypedArray",
    "ArrayBuffer",
    "SharedArrayBuffer",
    "Date",
    "ObjectValue",
    "ObjectReference",
};
#endif

inline void bc_put_u8(BCWriterState *s, uint8_t v)
{
    dbuf_putc(&s->dbuf, v);
}

inline void bc_put_u16(BCWriterState *s, uint16_t v)
{
    if (s->byte_swap)
        v = bswap16(v);
    dbuf_put_u16(&s->dbuf, v);
}

inline void bc_put_u32(BCWriterState *s, uint32_t v)
{
    if (s->byte_swap)
        v = bswap32(v);
    dbuf_put_u32(&s->dbuf, v);
}

inline void bc_put_u64(BCWriterState *s, uint64_t v)
{
    if (s->byte_swap)
        v = bswap64(v);
    dbuf_put(&s->dbuf, (uint8_t *)&v, sizeof(v));
}

inline void bc_put_leb128(BCWriterState *s, uint32_t v)
{
    dbuf_put_leb128(&s->dbuf, v);
}

inline void bc_put_sleb128(BCWriterState *s, int32_t v)
{
    dbuf_put_sleb128(&s->dbuf, v);
}

inline void bc_set_flags(uint32_t *pflags, int *pidx, uint32_t val, int n)
{
    *pflags = *pflags | (val << *pidx);
    *pidx += n;
}

static int bc_atom_to_idx(BCWriterState *s, uint32_t *pres, JSAtom atom)
{
    uint32_t v;

    if (atom < s->first_atom || __JS_AtomIsTaggedInt(atom)) {
        *pres = atom;
        return 0;
    }
    atom -= s->first_atom;
    if (atom < s->atom_to_idx_size && s->atom_to_idx[atom] != 0) {
        *pres = s->atom_to_idx[atom];
        return 0;
    }
    if (atom >= s->atom_to_idx_size) {
        int old_size, i;
        old_size = s->atom_to_idx_size;
        if (js_resize_array(s->ctx, (void **)&s->atom_to_idx,
                            sizeof(s->atom_to_idx[0]), &s->atom_to_idx_size,
                            atom + 1))
            return -1;
        /* XXX: could add a specific js_resize_array() function to do it */
        for(i = old_size; i < s->atom_to_idx_size; i++)
            s->atom_to_idx[i] = 0;
    }
    if (js_resize_array(s->ctx, (void **)&s->idx_to_atom,
                        sizeof(s->idx_to_atom[0]),
                        &s->idx_to_atom_size, s->idx_to_atom_count + 1))
        goto fail;

    v = s->idx_to_atom_count++;
    s->idx_to_atom[v] = atom + s->first_atom;
    v += s->first_atom;
    s->atom_to_idx[atom] = v;
    *pres = v;
    return 0;
 fail:
    *pres = 0;
    return -1;
}

static int bc_put_atom(BCWriterState *s, JSAtom atom)
{
    uint32_t v;

    if (__JS_AtomIsTaggedInt(atom)) {
        v = (__JS_AtomToUInt32(atom) << 1) | 1;
    } else {
        if (bc_atom_to_idx(s, &v, atom))
            return -1;
        v <<= 1;
    }
    bc_put_leb128(s, v);
    return 0;
}

static void bc_byte_swap(uint8_t *bc_buf, int bc_len)
{
    int pos, len, op, fmt;

    pos = 0;
    while (pos < bc_len) {
        op = bc_buf[pos];
        len = short_opcode_info(op).size;
        fmt = short_opcode_info(op).fmt;
        switch(fmt) {
        case OP_FMT_u16:
        case OP_FMT_i16:
        case OP_FMT_label16:
        case OP_FMT_npop:
        case OP_FMT_loc:
        case OP_FMT_arg:
        case OP_FMT_var_ref:
            put_u16(bc_buf + pos + 1,
                    bswap16(get_u16(bc_buf + pos + 1)));
            break;
        case OP_FMT_i32:
        case OP_FMT_u32:
        case OP_FMT_const:
        case OP_FMT_label:
        case OP_FMT_atom:
        case OP_FMT_atom_u8:
            put_u32(bc_buf + pos + 1,
                    bswap32(get_u32(bc_buf + pos + 1)));
            break;
        case OP_FMT_atom_u16:
        case OP_FMT_label_u16:
            put_u32(bc_buf + pos + 1,
                    bswap32(get_u32(bc_buf + pos + 1)));
            put_u16(bc_buf + pos + 1 + 4,
                    bswap16(get_u16(bc_buf + pos + 1 + 4)));
            break;
        case OP_FMT_atom_label_u8:
        case OP_FMT_atom_label_u16:
            put_u32(bc_buf + pos + 1,
                    bswap32(get_u32(bc_buf + pos + 1)));
            put_u32(bc_buf + pos + 1 + 4,
                    bswap32(get_u32(bc_buf + pos + 1 + 4)));
            if (fmt == OP_FMT_atom_label_u16) {
                put_u16(bc_buf + pos + 1 + 4 + 4,
                        bswap16(get_u16(bc_buf + pos + 1 + 4 + 4)));
            }
            break;
        case OP_FMT_npop_u16:
            put_u16(bc_buf + pos + 1,
                    bswap16(get_u16(bc_buf + pos + 1)));
            put_u16(bc_buf + pos + 1 + 2,
                    bswap16(get_u16(bc_buf + pos + 1 + 2)));
            break;
        default:
            break;
        }
        pos += len;
    }
}

static int JS_WriteFunctionBytecode(BCWriterState *s,
                                    const uint8_t *bc_buf1, int bc_len)
{
    int pos, len, op;
    JSAtom atom;
    uint8_t *bc_buf;
    uint32_t val;

    bc_buf = (uint8_t*) js_malloc(s->ctx, bc_len);
    if (!bc_buf)
        return -1;
    memcpy(bc_buf, bc_buf1, bc_len);

    pos = 0;
    while (pos < bc_len) {
        op = bc_buf[pos];
        len = short_opcode_info(op).size;
        switch(short_opcode_info(op).fmt) {
        case OP_FMT_atom:
        case OP_FMT_atom_u8:
        case OP_FMT_atom_u16:
        case OP_FMT_atom_label_u8:
        case OP_FMT_atom_label_u16:
            atom = get_u32(bc_buf + pos + 1);
            if (bc_atom_to_idx(s, &val, atom))
                goto fail;
            put_u32(bc_buf + pos + 1, val);
            break;
        default:
            break;
        }
        pos += len;
    }

    if (s->byte_swap)
        bc_byte_swap(bc_buf, bc_len);

    dbuf_put(&s->dbuf, bc_buf, bc_len);

    js_free(s->ctx, bc_buf);
    return 0;
 fail:
    js_free(s->ctx, bc_buf);
    return -1;
}

static void JS_WriteString(BCWriterState *s, JSString *p)
{
    int i;
    bc_put_leb128(s, ((uint32_t)p->len << 1) | p->is_wide_char);
    if (p->is_wide_char) {
        for(i = 0; i < p->len; i++)
            bc_put_u16(s, p->u.str16[i]);
    } else {
        dbuf_put(&s->dbuf, p->u.str8, p->len);
    }
}

#ifdef CONFIG_BIGNUM
static int JS_WriteBigNum(BCWriterState *s, JSValueConst obj)
{
    uint32_t tag, tag1;
    int64_t e;
    JSBigFloat *bf = JS_VALUE_GET_PTR(obj);
    bf_t *a = &bf->num;
    size_t len, i, n1, j;
    limb_t v;

    tag = JS_VALUE_GET_TAG(obj);
    switch(tag) {
    case JS_TAG_BIG_INT:
        tag1 = BC_TAG_BIG_INT;
        break;
    case JS_TAG_BIG_FLOAT:
        tag1 = BC_TAG_BIG_FLOAT;
        break;
    case JS_TAG_BIG_DECIMAL:
        tag1 = BC_TAG_BIG_DECIMAL;
        break;
    default:
        abort();
    }
    bc_put_u8(s, tag1);

    /* sign + exponent */
    if (a->expn == BF_EXP_ZERO)
        e = 0;
    else if (a->expn == BF_EXP_INF)
        e = 1;
    else if (a->expn == BF_EXP_NAN)
        e = 2;
    else if (a->expn >= 0)
        e = a->expn + 3;
    else
        e = a->expn;
    e = (e << 1) | a->sign;
    if (e < INT32_MIN || e > INT32_MAX) {
        JS_ThrowInternalError(s->ctx, "bignum exponent is too large");
        return -1;
    }
    bc_put_sleb128(s, e);

    /* mantissa */
    if (a->len != 0) {
        if (tag != JS_TAG_BIG_DECIMAL) {
            i = 0;
            while (i < a->len && a->tab[i] == 0)
                i++;
            assert(i < a->len);
            v = a->tab[i];
            n1 = sizeof(limb_t);
            while ((v & 0xff) == 0) {
                n1--;
                v >>= 8;
            }
            i++;
            len = (a->len - i) * sizeof(limb_t) + n1;
            if (len > INT32_MAX) {
                JS_ThrowInternalError(s->ctx, "bignum is too large");
                return -1;
            }
            bc_put_leb128(s, len);
            /* always saved in byte based little endian representation */
            for(j = 0; j < n1; j++) {
                dbuf_putc(&s->dbuf, v >> (j * 8));
            }
            for(; i < a->len; i++) {
                limb_t v = a->tab[i];
#if LIMB_BITS == 32
#if CHOC_BIGENDIAN
                v = bswap32(v);
#endif
                dbuf_put_u32(&s->dbuf, v);
#else
#if CHOC_BIGENDIAN
                v = bswap64(v);
#endif
                dbuf_put_u64(&s->dbuf, v);
#endif
            }
        } else {
            int bpos, d;
            uint8_t v8;
            size_t i0;

            /* little endian BCD */
            i = 0;
            while (i < a->len && a->tab[i] == 0)
                i++;
            assert(i < a->len);
            len = a->len * LIMB_DIGITS;
            v = a->tab[i];
            j = 0;
            while ((v % 10) == 0) {
                j++;
                v /= 10;
            }
            len -= j;
            assert(len > 0);
            if (len > INT32_MAX) {
                JS_ThrowInternalError(s->ctx, "bignum is too large");
                return -1;
            }
            bc_put_leb128(s, len);

            bpos = 0;
            v8 = 0;
            i0 = i;
            for(; i < a->len; i++) {
                if (i != i0) {
                    v = a->tab[i];
                    j = 0;
                }
                for(; j < LIMB_DIGITS; j++) {
                    d = v % 10;
                    v /= 10;
                    if (bpos == 0) {
                        v8 = d;
                        bpos = 1;
                    } else {
                        dbuf_putc(&s->dbuf, v8 | (d << 4));
                        bpos = 0;
                    }
                }
            }
            /* flush the last digit */
            if (bpos) {
                dbuf_putc(&s->dbuf, v8);
            }
        }
    }
    return 0;
}
#endif /* CONFIG_BIGNUM */

static int JS_WriteObjectRec(BCWriterState *s, JSValueConst obj);

static int JS_WriteFunctionTag(BCWriterState *s, JSValueConst obj)
{
    auto b = (JSFunctionBytecode*) JS_VALUE_GET_PTR(obj);
    uint32_t flags;
    int idx, i;

    bc_put_u8(s, BC_TAG_FUNCTION_BYTECODE);
    flags = idx = 0;
    bc_set_flags(&flags, &idx, b->has_prototype, 1);
    bc_set_flags(&flags, &idx, b->has_simple_parameter_list, 1);
    bc_set_flags(&flags, &idx, b->is_derived_class_constructor, 1);
    bc_set_flags(&flags, &idx, b->need_home_object, 1);
    bc_set_flags(&flags, &idx, b->func_kind, 2);
    bc_set_flags(&flags, &idx, b->new_target_allowed, 1);
    bc_set_flags(&flags, &idx, b->super_call_allowed, 1);
    bc_set_flags(&flags, &idx, b->super_allowed, 1);
    bc_set_flags(&flags, &idx, b->arguments_allowed, 1);
    bc_set_flags(&flags, &idx, b->has_debug, 1);
    bc_set_flags(&flags, &idx, b->backtrace_barrier, 1);
    assert(idx <= 16);
    bc_put_u16(s, flags);
    bc_put_u8(s, b->js_mode);
    bc_put_atom(s, b->func_name);

    bc_put_leb128(s, b->arg_count);
    bc_put_leb128(s, b->var_count);
    bc_put_leb128(s, b->defined_arg_count);
    bc_put_leb128(s, b->stack_size);
    bc_put_leb128(s, b->closure_var_count);
    bc_put_leb128(s, b->cpool_count);
    bc_put_leb128(s, b->byte_code_len);
    if (b->vardefs) {
        /* XXX: this field is redundant */
        bc_put_leb128(s, b->arg_count + b->var_count);
        for(i = 0; i < b->arg_count + b->var_count; i++) {
            JSVarDef *vd = &b->vardefs[i];
            bc_put_atom(s, vd->var_name);
            bc_put_leb128(s, vd->scope_level);
            bc_put_leb128(s, vd->scope_next + 1);
            flags = idx = 0;
            bc_set_flags(&flags, &idx, vd->var_kind, 4);
            bc_set_flags(&flags, &idx, vd->is_const, 1);
            bc_set_flags(&flags, &idx, vd->is_lexical, 1);
            bc_set_flags(&flags, &idx, vd->is_captured, 1);
            assert(idx <= 8);
            bc_put_u8(s, flags);
        }
    } else {
        bc_put_leb128(s, 0);
    }

    for(i = 0; i < b->closure_var_count; i++) {
        JSClosureVar *cv = &b->closure_var[i];
        bc_put_atom(s, cv->var_name);
        bc_put_leb128(s, cv->var_idx);
        flags = idx = 0;
        bc_set_flags(&flags, &idx, cv->is_local, 1);
        bc_set_flags(&flags, &idx, cv->is_arg, 1);
        bc_set_flags(&flags, &idx, cv->is_const, 1);
        bc_set_flags(&flags, &idx, cv->is_lexical, 1);
        bc_set_flags(&flags, &idx, cv->var_kind, 4);
        assert(idx <= 8);
        bc_put_u8(s, flags);
    }

    if (JS_WriteFunctionBytecode(s, b->byte_code_buf, b->byte_code_len))
        goto fail;

    if (b->has_debug) {
        bc_put_atom(s, b->debug.filename);
        bc_put_leb128(s, b->debug.line_num);
        bc_put_leb128(s, b->debug.pc2line_len);
        dbuf_put(&s->dbuf, b->debug.pc2line_buf, b->debug.pc2line_len);
    }

    for(i = 0; i < b->cpool_count; i++) {
        if (JS_WriteObjectRec(s, b->cpool[i]))
            goto fail;
    }
    return 0;
 fail:
    return -1;
}

static int JS_WriteModule(BCWriterState *s, JSValueConst obj)
{
    auto m = (JSModuleDef*) JS_VALUE_GET_PTR(obj);
    int i;

    bc_put_u8(s, BC_TAG_MODULE);
    bc_put_atom(s, m->module_name);

    bc_put_leb128(s, m->req_module_entries_count);
    for(i = 0; i < m->req_module_entries_count; i++) {
        JSReqModuleEntry *rme = &m->req_module_entries[i];
        bc_put_atom(s, rme->module_name);
    }

    bc_put_leb128(s, m->export_entries_count);
    for(i = 0; i < m->export_entries_count; i++) {
        JSExportEntry *me = &m->export_entries[i];
        bc_put_u8(s, me->export_type);
        if (me->export_type == JS_EXPORT_TYPE_LOCAL) {
            bc_put_leb128(s, me->u.local.var_idx);
        } else {
            bc_put_leb128(s, me->u.req_module_idx);
            bc_put_atom(s, me->local_name);
        }
        bc_put_atom(s, me->export_name);
    }

    bc_put_leb128(s, m->star_export_entries_count);
    for(i = 0; i < m->star_export_entries_count; i++) {
        JSStarExportEntry *se = &m->star_export_entries[i];
        bc_put_leb128(s, se->req_module_idx);
    }

    bc_put_leb128(s, m->import_entries_count);
    for(i = 0; i < m->import_entries_count; i++) {
        JSImportEntry *mi = &m->import_entries[i];
        bc_put_leb128(s, mi->var_idx);
        bc_put_atom(s, mi->import_name);
        bc_put_leb128(s, mi->req_module_idx);
    }

    if (JS_WriteObjectRec(s, m->func_obj))
        goto fail;
    return 0;
 fail:
    return -1;
}

static int JS_WriteArray(BCWriterState *s, JSValueConst obj)
{
    JSObject *p = JS_VALUE_GET_OBJ(obj);
    uint32_t i, len;
    JSValue val;
    int ret;
    BOOL is_template;

    if (s->allow_bytecode && !p->extensible) {
        /* not extensible array: we consider it is a
           template when we are saving bytecode */
        bc_put_u8(s, BC_TAG_TEMPLATE_OBJECT);
        is_template = TRUE;
    } else {
        bc_put_u8(s, BC_TAG_ARRAY);
        is_template = FALSE;
    }
    if (js_get_length32(s->ctx, &len, obj))
        goto fail1;
    bc_put_leb128(s, len);
    for(i = 0; i < len; i++) {
        val = JS_GetPropertyUint32(s->ctx, obj, i);
        if (JS_IsException(val))
            goto fail1;
        ret = JS_WriteObjectRec(s, val);
        JS_FreeValue(s->ctx, val);
        if (ret)
            goto fail1;
    }
    if (is_template) {
        val = JS_GetProperty(s->ctx, obj, JS_ATOM_raw);
        if (JS_IsException(val))
            goto fail1;
        ret = JS_WriteObjectRec(s, val);
        JS_FreeValue(s->ctx, val);
        if (ret)
            goto fail1;
    }
    return 0;
 fail1:
    return -1;
}

static int JS_WriteObjectTag(BCWriterState *s, JSValueConst obj)
{
    JSObject *p = JS_VALUE_GET_OBJ(obj);
    uint32_t i, prop_count;
    JSShape *sh;
    JSShapeProperty *pr;
    int pass;
    JSAtom atom;

    bc_put_u8(s, BC_TAG_OBJECT);
    prop_count = 0;
    sh = p->shape;
    for(pass = 0; pass < 2; pass++) {
        if (pass == 1)
            bc_put_leb128(s, prop_count);
        for(i = 0, pr = get_shape_prop(sh); i < sh->prop_count; i++, pr++) {
            atom = pr->atom;
            if (atom != JS_ATOM_NULL &&
                JS_AtomIsString(s->ctx, atom) &&
                (pr->flags & JS_PROP_ENUMERABLE)) {
                if (pr->flags & JS_PROP_TMASK) {
                    JS_ThrowTypeError(s->ctx, "only value properties are supported");
                    goto fail;
                }
                if (pass == 0) {
                    prop_count++;
                } else {
                    bc_put_atom(s, atom);
                    if (JS_WriteObjectRec(s, p->prop[i].u.value))
                        goto fail;
                }
            }
        }
    }
    return 0;
 fail:
    return -1;
}

static int JS_WriteTypedArray(BCWriterState *s, JSValueConst obj)
{
    JSObject *p = JS_VALUE_GET_OBJ(obj);
    JSTypedArray *ta = p->u.typed_array;

    bc_put_u8(s, BC_TAG_TYPED_ARRAY);
    bc_put_u8(s, p->class_id - JS_CLASS_UINT8C_ARRAY);
    bc_put_leb128(s, p->u.array.count);
    bc_put_leb128(s, ta->offset);
    if (JS_WriteObjectRec(s, JS_MKPTR(JS_TAG_OBJECT, ta->buffer)))
        return -1;
    return 0;
}

static int JS_WriteArrayBuffer(BCWriterState *s, JSValueConst obj)
{
    JSObject *p = JS_VALUE_GET_OBJ(obj);
    JSArrayBuffer *abuf = p->u.array_buffer;
    if (abuf->detached) {
        JS_ThrowTypeErrorDetachedArrayBuffer(s->ctx);
        return -1;
    }
    bc_put_u8(s, BC_TAG_ARRAY_BUFFER);
    bc_put_leb128(s, abuf->byte_length);
    dbuf_put(&s->dbuf, abuf->data, abuf->byte_length);
    return 0;
}

static int JS_WriteSharedArrayBuffer(BCWriterState *s, JSValueConst obj)
{
    JSObject *p = JS_VALUE_GET_OBJ(obj);
    JSArrayBuffer *abuf = p->u.array_buffer;
    assert(!abuf->detached); /* SharedArrayBuffer are never detached */
    bc_put_u8(s, BC_TAG_SHARED_ARRAY_BUFFER);
    bc_put_leb128(s, abuf->byte_length);
    bc_put_u64(s, (uintptr_t)abuf->data);
    if (js_resize_array(s->ctx, (void **)&s->sab_tab, sizeof(s->sab_tab[0]),
                        &s->sab_tab_size, s->sab_tab_len + 1))
        return -1;
    /* keep the SAB pointer so that the user can clone it or free it */
    s->sab_tab[s->sab_tab_len++] = abuf->data;
    return 0;
}

static int JS_WriteObjectRec(BCWriterState *s, JSValueConst obj)
{
    uint32_t tag;

    if (js_check_stack_overflow(s->ctx->rt, 0)) {
        JS_ThrowStackOverflow(s->ctx);
        return -1;
    }

    tag = JS_VALUE_GET_NORM_TAG(obj);
    switch(tag) {
    case JS_TAG_NULL:
        bc_put_u8(s, BC_TAG_NULL);
        break;
    case JS_TAG_UNDEFINED:
        bc_put_u8(s, BC_TAG_UNDEFINED);
        break;
    case JS_TAG_BOOL:
        bc_put_u8(s, BC_TAG_BOOL_FALSE + JS_VALUE_GET_INT(obj));
        break;
    case JS_TAG_INT:
        bc_put_u8(s, BC_TAG_INT32);
        bc_put_sleb128(s, JS_VALUE_GET_INT(obj));
        break;
    case JS_TAG_FLOAT64:
        {
            JSFloat64Union u;
            bc_put_u8(s, BC_TAG_FLOAT64);
            u.d = JS_VALUE_GET_FLOAT64(obj);
            bc_put_u64(s, u.u64);
        }
        break;
    case JS_TAG_STRING:
        {
            JSString *p = JS_VALUE_GET_STRING(obj);
            bc_put_u8(s, BC_TAG_STRING);
            JS_WriteString(s, p);
        }
        break;
    case JS_TAG_FUNCTION_BYTECODE:
        if (!s->allow_bytecode)
            goto invalid_tag;
        if (JS_WriteFunctionTag(s, obj))
            goto fail;
        break;
    case JS_TAG_MODULE:
        if (!s->allow_bytecode)
            goto invalid_tag;
        if (JS_WriteModule(s, obj))
            goto fail;
        break;
    case JS_TAG_OBJECT:
        {
            JSObject *p = JS_VALUE_GET_OBJ(obj);
            int ret, idx;

            if (s->allow_reference) {
                idx = js_object_list_find(s->ctx, &s->object_list, p);
                if (idx >= 0) {
                    bc_put_u8(s, BC_TAG_OBJECT_REFERENCE);
                    bc_put_leb128(s, idx);
                    break;
                } else {
                    if (js_object_list_add(s->ctx, &s->object_list, p))
                        goto fail;
                }
            } else {
                if (p->tmp_mark) {
                    JS_ThrowTypeError(s->ctx, "circular reference");
                    goto fail;
                }
                p->tmp_mark = 1;
            }
            switch(p->class_id) {
            case JS_CLASS_ARRAY:
                ret = JS_WriteArray(s, obj);
                break;
            case JS_CLASS_OBJECT:
                ret = JS_WriteObjectTag(s, obj);
                break;
            case JS_CLASS_ARRAY_BUFFER:
                ret = JS_WriteArrayBuffer(s, obj);
                break;
            case JS_CLASS_SHARED_ARRAY_BUFFER:
                if (!s->allow_sab)
                    goto invalid_tag;
                ret = JS_WriteSharedArrayBuffer(s, obj);
                break;
            case JS_CLASS_DATE:
                bc_put_u8(s, BC_TAG_DATE);
                ret = JS_WriteObjectRec(s, p->u.object_data);
                break;
            case JS_CLASS_NUMBER:
            case JS_CLASS_STRING:
            case JS_CLASS_BOOLEAN:
#ifdef CONFIG_BIGNUM
            case JS_CLASS_BIG_INT:
            case JS_CLASS_BIG_FLOAT:
            case JS_CLASS_BIG_DECIMAL:
#endif
                bc_put_u8(s, BC_TAG_OBJECT_VALUE);
                ret = JS_WriteObjectRec(s, p->u.object_data);
                break;
            default:
                if (p->class_id >= JS_CLASS_UINT8C_ARRAY &&
                    p->class_id <= JS_CLASS_FLOAT64_ARRAY) {
                    ret = JS_WriteTypedArray(s, obj);
                } else {
                    JS_ThrowTypeError(s->ctx, "unsupported object class");
                    ret = -1;
                }
                break;
            }
            p->tmp_mark = 0;
            if (ret)
                goto fail;
        }
        break;
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
    case JS_TAG_BIG_FLOAT:
    case JS_TAG_BIG_DECIMAL:
        if (JS_WriteBigNum(s, obj))
            goto fail;
        break;
#endif
    default:
    invalid_tag:
        JS_ThrowInternalError(s->ctx, "unsupported tag (%d)", tag);
        goto fail;
    }
    return 0;

 fail:
    return -1;
}

/* create the atom table */
static int JS_WriteObjectAtoms(BCWriterState *s)
{
    JSRuntime *rt = s->ctx->rt;
    DynBuf dbuf1;
    int i, atoms_size;
    uint8_t version;

    dbuf1 = s->dbuf;
    js_dbuf_init(s->ctx, &s->dbuf);

    version = BC_VERSION;
    if (s->byte_swap)
        version ^= BC_BE_VERSION;
    bc_put_u8(s, version);

    bc_put_leb128(s, s->idx_to_atom_count);
    for(i = 0; i < s->idx_to_atom_count; i++) {
        JSAtomStruct *p = rt->atom_array[s->idx_to_atom[i]];
        JS_WriteString(s, p);
    }
    /* XXX: should check for OOM in above phase */

    /* move the atoms at the start */
    /* XXX: could just append dbuf1 data, but it uses more memory if
       dbuf1 is larger than dbuf */
    atoms_size = s->dbuf.size;
    if (dbuf_realloc(&dbuf1, dbuf1.size + atoms_size))
        goto fail;
    memmove(dbuf1.buf + atoms_size, dbuf1.buf, dbuf1.size);
    memcpy(dbuf1.buf, s->dbuf.buf, atoms_size);
    dbuf1.size += atoms_size;
    dbuf_free(&s->dbuf);
    s->dbuf = dbuf1;
    return 0;
 fail:
    dbuf_free(&dbuf1);
    return -1;
}

inline uint8_t *JS_WriteObject2(JSContext *ctx, size_t *psize, JSValueConst obj,
                         int flags, uint8_t ***psab_tab, size_t *psab_tab_len)
{
    BCWriterState ss, *s = &ss;

    memset(s, 0, sizeof(*s));
    s->ctx = ctx;
    /* XXX: byte swapped output is untested */
    s->byte_swap = ((flags & JS_WRITE_OBJ_BSWAP) != 0);
    s->allow_bytecode = ((flags & JS_WRITE_OBJ_BYTECODE) != 0);
    s->allow_sab = ((flags & JS_WRITE_OBJ_SAB) != 0);
    s->allow_reference = ((flags & JS_WRITE_OBJ_REFERENCE) != 0);
    /* XXX: could use a different version when bytecode is included */
    if (s->allow_bytecode)
        s->first_atom = JS_ATOM_END;
    else
        s->first_atom = 1;
    js_dbuf_init(ctx, &s->dbuf);
    js_object_list_init(&s->object_list);

    if (JS_WriteObjectRec(s, obj))
        goto fail;
    if (JS_WriteObjectAtoms(s))
        goto fail;
    js_object_list_end(ctx, &s->object_list);
    js_free(ctx, s->atom_to_idx);
    js_free(ctx, s->idx_to_atom);
    *psize = s->dbuf.size;
    if (psab_tab)
        *psab_tab = s->sab_tab;
    if (psab_tab_len)
        *psab_tab_len = s->sab_tab_len;
    return s->dbuf.buf;
 fail:
    js_object_list_end(ctx, &s->object_list);
    js_free(ctx, s->atom_to_idx);
    js_free(ctx, s->idx_to_atom);
    dbuf_free(&s->dbuf);
    *psize = 0;
    if (psab_tab)
        *psab_tab = NULL;
    if (psab_tab_len)
        *psab_tab_len = 0;
    return NULL;
}

inline uint8_t *JS_WriteObject(JSContext *ctx, size_t *psize, JSValueConst obj,
                        int flags)
{
    return JS_WriteObject2(ctx, psize, obj, flags, NULL, NULL);
}

typedef struct BCReaderState {
    JSContext *ctx;
    const uint8_t *buf_start, *ptr, *buf_end;
    uint32_t first_atom;
    uint32_t idx_to_atom_count;
    JSAtom *idx_to_atom;
    int error_state;
    BOOL allow_sab : 8;
    BOOL allow_bytecode : 8;
    BOOL is_rom_data : 8;
    BOOL allow_reference : 8;
    /* object references */
    JSObject **objects;
    int objects_count;
    int objects_size;

#ifdef DUMP_READ_OBJECT
    const uint8_t *ptr_last;
    int level;
#endif
} BCReaderState;

#ifdef DUMP_READ_OBJECT
static void bc_read_trace(BCReaderState *s, const char *fmt, ...) {
    va_list ap;
    int i, n, n0;

    if (!s->ptr_last)
        s->ptr_last = s->buf_start;

    n = n0 = 0;
    if (s->ptr > s->ptr_last || s->ptr == s->buf_start) {
        n0 = printf("%04x: ", (int)(s->ptr_last - s->buf_start));
        n += n0;
    }
    for (i = 0; s->ptr_last < s->ptr; i++) {
        if ((i & 7) == 0 && i > 0) {
            printf("\n%*s", n0, "");
            n = n0;
        }
        n += printf(" %02x", *s->ptr_last++);
    }
    if (*fmt == '}')
        s->level--;
    if (n < 32 + s->level * 2) {
        printf("%*s", 32 + s->level * 2 - n, "");
    }
    va_start(ap, fmt);
    vfprintf(stdout, fmt, ap);
    va_end(ap);
    if (strchr(fmt, '{'))
        s->level++;
}
#else
#define bc_read_trace(...)
#endif

inline int bc_read_error_end(BCReaderState *s)
{
    if (!s->error_state) {
        JS_ThrowSyntaxError(s->ctx, "read after the end of the buffer");
    }
    return s->error_state = -1;
}

inline int bc_get_u8(BCReaderState *s, uint8_t *pval)
{
    if (js_unlikely(s->buf_end - s->ptr < 1)) {
        *pval = 0; /* avoid warning */
        return bc_read_error_end(s);
    }
    *pval = *s->ptr++;
    return 0;
}

inline int bc_get_u16(BCReaderState *s, uint16_t *pval)
{
    if (js_unlikely(s->buf_end - s->ptr < 2)) {
        *pval = 0; /* avoid warning */
        return bc_read_error_end(s);
    }
    *pval = get_u16(s->ptr);
    s->ptr += 2;
    return 0;
}

inline int bc_get_u32(BCReaderState *s, uint32_t *pval)
{
    if (js_unlikely(s->buf_end - s->ptr < 4)) {
        *pval = 0; /* avoid warning */
        return bc_read_error_end(s);
    }
    *pval = get_u32(s->ptr);
    s->ptr += 4;
    return 0;
}

inline int bc_get_u64(BCReaderState *s, uint64_t *pval)
{
    if (js_unlikely(s->buf_end - s->ptr < 8)) {
        *pval = 0; /* avoid warning */
        return bc_read_error_end(s);
    }
    *pval = get_u64(s->ptr);
    s->ptr += 8;
    return 0;
}

inline int bc_get_leb128(BCReaderState *s, uint32_t *pval)
{
    int ret;
    ret = get_leb128(pval, s->ptr, s->buf_end);
    if (js_unlikely(ret < 0))
        return bc_read_error_end(s);
    s->ptr += ret;
    return 0;
}

inline int bc_get_sleb128(BCReaderState *s, int32_t *pval)
{
    int ret;
    ret = get_sleb128(pval, s->ptr, s->buf_end);
    if (js_unlikely(ret < 0))
        return bc_read_error_end(s);
    s->ptr += ret;
    return 0;
}

/* XXX: used to read an `int` with a positive value */
inline int bc_get_leb128_int(BCReaderState *s, int *pval)
{
    return bc_get_leb128(s, (uint32_t *)pval);
}

inline int bc_get_leb128_u16(BCReaderState *s, uint16_t *pval)
{
    uint32_t val;
    if (bc_get_leb128(s, &val)) {
        *pval = 0;
        return -1;
    }
    *pval = val;
    return 0;
}

inline int bc_get_buf(BCReaderState *s, uint8_t *buf, uint32_t buf_len)
{
    if (buf_len != 0) {
        if (js_unlikely(!buf || s->buf_end - s->ptr < buf_len))
            return bc_read_error_end(s);
        memcpy(buf, s->ptr, buf_len);
        s->ptr += buf_len;
    }
    return 0;
}

inline int bc_idx_to_atom(BCReaderState *s, JSAtom *patom, uint32_t idx)
{
    JSAtom atom;

    if (__JS_AtomIsTaggedInt(idx)) {
        atom = idx;
    } else if (idx < s->first_atom) {
        atom = JS_DupAtom(s->ctx, idx);
    } else {
        idx -= s->first_atom;
        if (idx >= s->idx_to_atom_count) {
            JS_ThrowSyntaxError(s->ctx, "invalid atom index (pos=%u)",
                                (unsigned int)(s->ptr - s->buf_start));
            *patom = JS_ATOM_NULL;
            return s->error_state = -1;
        }
        atom = JS_DupAtom(s->ctx, s->idx_to_atom[idx]);
    }
    *patom = atom;
    return 0;
}

inline int bc_get_atom(BCReaderState *s, JSAtom *patom)
{
    uint32_t v;
    if (bc_get_leb128(s, &v))
        return -1;
    if (v & 1) {
        *patom = __JS_AtomFromUInt32(v >> 1);
        return 0;
    } else {
        return bc_idx_to_atom(s, patom, v >> 1);
    }
}

static JSString *JS_ReadString(BCReaderState *s)
{
    uint32_t len;
    size_t size;
    BOOL is_wide_char;
    JSString *p;

    if (bc_get_leb128(s, &len))
        return NULL;
    is_wide_char = len & 1;
    len >>= 1;
    p = js_alloc_string(s->ctx, len, is_wide_char);
    if (!p) {
        s->error_state = -1;
        return NULL;
    }
    size = (size_t)len << is_wide_char;
    if ((s->buf_end - s->ptr) < size) {
        bc_read_error_end(s);
        js_free_string(s->ctx->rt, p);
        return NULL;
    }
    memcpy(p->u.str8, s->ptr, size);
    s->ptr += size;
    if (!is_wide_char) {
        p->u.str8[size] = '\0'; /* add the trailing zero for 8 bit strings */
    }
#ifdef DUMP_READ_OBJECT
    JS_DumpString(s->ctx->rt, p); printf("\n");
#endif
    return p;
}

static uint32_t bc_get_flags(uint32_t flags, int *pidx, int n)
{
    uint32_t val;
    /* XXX: this does not work for n == 32 */
    val = (flags >> *pidx) & ((1U << n) - 1);
    *pidx += n;
    return val;
}

static int JS_ReadFunctionBytecode(BCReaderState *s, JSFunctionBytecode *b,
                                   int byte_code_offset, uint32_t bc_len)
{
    uint8_t *bc_buf;
    int pos, len, op;
    JSAtom atom;
    uint32_t idx;

    if (s->is_rom_data) {
        /* directly use the input buffer */
        if (js_unlikely(s->buf_end - s->ptr < bc_len))
            return bc_read_error_end(s);
        bc_buf = (uint8_t *)s->ptr;
        s->ptr += bc_len;
    } else {
        bc_buf = (uint8_t*)b + byte_code_offset;
        if (bc_get_buf(s, bc_buf, bc_len))
            return -1;
    }
    b->byte_code_buf = bc_buf;

    pos = 0;
    while (pos < bc_len) {
        op = bc_buf[pos];
        len = short_opcode_info(op).size;
        switch(short_opcode_info(op).fmt) {
        case OP_FMT_atom:
        case OP_FMT_atom_u8:
        case OP_FMT_atom_u16:
        case OP_FMT_atom_label_u8:
        case OP_FMT_atom_label_u16:
            idx = get_u32(bc_buf + pos + 1);
            if (s->is_rom_data) {
                /* just increment the reference count of the atom */
                JS_DupAtom(s->ctx, (JSAtom)idx);
            } else {
                if (bc_idx_to_atom(s, &atom, idx)) {
                    /* Note: the atoms will be freed up to this position */
                    b->byte_code_len = pos;
                    return -1;
                }
                put_u32(bc_buf + pos + 1, atom);
#ifdef DUMP_READ_OBJECT
                bc_read_trace(s, "at %d, fixup atom: ", pos + 1); print_atom(s->ctx, atom); printf("\n");
#endif
            }
            break;
        default:
            break;
        }
        pos += len;
    }
    return 0;
}

#ifdef CONFIG_BIGNUM
static JSValue JS_ReadBigNum(BCReaderState *s, int tag)
{
    JSValue obj = JS_UNDEFINED;
    uint8_t v8;
    int32_t e;
    uint32_t len;
    limb_t l, i, n, j;
    JSBigFloat *p;
    limb_t v;
    bf_t *a;
    int bpos, d;

    p = js_new_bf(s->ctx);
    if (!p)
        goto fail;
    switch(tag) {
    case BC_TAG_BIG_INT:
        obj = JS_MKPTR(JS_TAG_BIG_INT, p);
        break;
    case BC_TAG_BIG_FLOAT:
        obj = JS_MKPTR(JS_TAG_BIG_FLOAT, p);
        break;
    case BC_TAG_BIG_DECIMAL:
        obj = JS_MKPTR(JS_TAG_BIG_DECIMAL, p);
        break;
    default:
        abort();
    }

    /* sign + exponent */
    if (bc_get_sleb128(s, &e))
        goto fail;

    a = &p->num;
    a->sign = e & 1;
    e >>= 1;
    if (e == 0)
        a->expn = BF_EXP_ZERO;
    else if (e == 1)
        a->expn = BF_EXP_INF;
    else if (e == 2)
        a->expn = BF_EXP_NAN;
    else if (e >= 3)
        a->expn = e - 3;
    else
        a->expn = e;

    /* mantissa */
    if (a->expn != BF_EXP_ZERO &&
        a->expn != BF_EXP_INF &&
        a->expn != BF_EXP_NAN) {
        if (bc_get_leb128(s, &len))
            goto fail;
        bc_read_trace(s, "len=%" PRId64 "\n", (int64_t)len);
        if (len == 0) {
            JS_ThrowInternalError(s->ctx, "invalid bignum length");
            goto fail;
        }
        if (tag != BC_TAG_BIG_DECIMAL)
            l = (len + sizeof(limb_t) - 1) / sizeof(limb_t);
        else
            l = (len + LIMB_DIGITS - 1) / LIMB_DIGITS;
        if (bf_resize(a, l)) {
            JS_ThrowOutOfMemory(s->ctx);
            goto fail;
        }
        if (tag != BC_TAG_BIG_DECIMAL) {
            n = len & (sizeof(limb_t) - 1);
            if (n != 0) {
                v = 0;
                for(i = 0; i < n; i++) {
                    if (bc_get_u8(s, &v8))
                        goto fail;
                    v |= (limb_t)v8 << ((sizeof(limb_t) - n + i) * 8);
                }
                a->tab[0] = v;
                i = 1;
            } else {
                i = 0;
            }
            for(; i < l; i++) {
#if LIMB_BITS == 32
                if (bc_get_u32(s, &v))
                    goto fail;
#if CHOC_BIGENDIAN
                v = bswap32(v);
#endif
#else
                if (bc_get_u64(s, &v))
                    goto fail;
#if CHOC_BIGENDIAN
                v = bswap64(v);
#endif
#endif
                a->tab[i] = v;
            }
        } else {
            bpos = 0;
            for(i = 0; i < l; i++) {
                if (i == 0 && (n = len % LIMB_DIGITS) != 0) {
                    j = LIMB_DIGITS - n;
                } else {
                    j = 0;
                }
                v = 0;
                for(; j < LIMB_DIGITS; j++) {
                    if (bpos == 0) {
                        if (bc_get_u8(s, &v8))
                            goto fail;
                        d = v8 & 0xf;
                        bpos = 1;
                    } else {
                        d = v8 >> 4;
                        bpos = 0;
                    }
                    if (d >= 10) {
                        JS_ThrowInternalError(s->ctx, "invalid digit");
                        goto fail;
                    }
                    v += mp_pow_dec[j] * d;
                }
                a->tab[i] = v;
            }
        }
    }
    bc_read_trace(s, "}\n");
    return obj;
 fail:
    JS_FreeValue(s->ctx, obj);
    return JS_EXCEPTION;
}
#endif /* CONFIG_BIGNUM */

static JSValue JS_ReadObjectRec(BCReaderState *s);

static int BC_add_object_ref1(BCReaderState *s, JSObject *p)
{
    if (s->allow_reference) {
        if (js_resize_array(s->ctx, (void**)&s->objects,
                            sizeof(s->objects[0]),
                            &s->objects_size, s->objects_count + 1))
            return -1;
        s->objects[s->objects_count++] = p;
    }
    return 0;
}

static int BC_add_object_ref(BCReaderState *s, JSValueConst obj)
{
    return BC_add_object_ref1(s, JS_VALUE_GET_OBJ(obj));
}

static JSValue JS_ReadFunctionTag(BCReaderState *s)
{
    JSContext *ctx = s->ctx;
    JSFunctionBytecode bc, *b;
    JSValue obj = JS_UNDEFINED;
    uint16_t v16;
    uint8_t v8;
    int idx, i, local_count;
    int function_size, cpool_offset, byte_code_offset;
    int closure_var_offset, vardefs_offset;

    memset(&bc, 0, sizeof(bc));
    bc.header.ref_count = 1;
    //bc.gc_header.mark = 0;

    if (bc_get_u16(s, &v16))
        goto fail;
    idx = 0;
    bc.has_prototype = bc_get_flags(v16, &idx, 1);
    bc.has_simple_parameter_list = bc_get_flags(v16, &idx, 1);
    bc.is_derived_class_constructor = bc_get_flags(v16, &idx, 1);
    bc.need_home_object = bc_get_flags(v16, &idx, 1);
    bc.func_kind = bc_get_flags(v16, &idx, 2);
    bc.new_target_allowed = bc_get_flags(v16, &idx, 1);
    bc.super_call_allowed = bc_get_flags(v16, &idx, 1);
    bc.super_allowed = bc_get_flags(v16, &idx, 1);
    bc.arguments_allowed = bc_get_flags(v16, &idx, 1);
    bc.has_debug = bc_get_flags(v16, &idx, 1);
    bc.backtrace_barrier = bc_get_flags(v16, &idx, 1);
    bc.read_only_bytecode = s->is_rom_data;
    if (bc_get_u8(s, &v8))
        goto fail;
    bc.js_mode = v8;
    if (bc_get_atom(s, &bc.func_name))  //@ atom leak if failure
        goto fail;
    if (bc_get_leb128_u16(s, &bc.arg_count))
        goto fail;
    if (bc_get_leb128_u16(s, &bc.var_count))
        goto fail;
    if (bc_get_leb128_u16(s, &bc.defined_arg_count))
        goto fail;
    if (bc_get_leb128_u16(s, &bc.stack_size))
        goto fail;
    if (bc_get_leb128_int(s, &bc.closure_var_count))
        goto fail;
    if (bc_get_leb128_int(s, &bc.cpool_count))
        goto fail;
    if (bc_get_leb128_int(s, &bc.byte_code_len))
        goto fail;
    if (bc_get_leb128_int(s, &local_count))
        goto fail;

    if (bc.has_debug) {
        function_size = sizeof(*b);
    } else {
        function_size = offsetof(JSFunctionBytecode, debug);
    }
    cpool_offset = function_size;
    function_size += bc.cpool_count * sizeof(*bc.cpool);
    vardefs_offset = function_size;
    function_size += local_count * sizeof(*bc.vardefs);
    closure_var_offset = function_size;
    function_size += bc.closure_var_count * sizeof(*bc.closure_var);
    byte_code_offset = function_size;
    if (!bc.read_only_bytecode) {
        function_size += bc.byte_code_len;
    }

    b = (JSFunctionBytecode*) js_mallocz(ctx, function_size);
    if (!b)
        return JS_EXCEPTION;

    memcpy(b, &bc, offsetof(JSFunctionBytecode, debug));
    b->header.ref_count = 1;
    if (local_count != 0) {
        b->vardefs = (JSVarDef*) ((uint8_t*)b + vardefs_offset);
    }
    if (b->closure_var_count != 0) {
        b->closure_var = (JSClosureVar*) ((uint8_t*)b + closure_var_offset);
    }
    if (b->cpool_count != 0) {
        b->cpool = (JSValue*) ((uint8_t*)b + cpool_offset);
    }

    add_gc_object(ctx->rt, &b->header, JS_GC_OBJ_TYPE_FUNCTION_BYTECODE);

    obj = JS_MKPTR(JS_TAG_FUNCTION_BYTECODE, b);

#ifdef DUMP_READ_OBJECT
    bc_read_trace(s, "name: "); print_atom(s->ctx, b->func_name); printf("\n");
#endif
    bc_read_trace(s, "args=%d vars=%d defargs=%d closures=%d cpool=%d\n",
                  b->arg_count, b->var_count, b->defined_arg_count,
                  b->closure_var_count, b->cpool_count);
    bc_read_trace(s, "stack=%d bclen=%d locals=%d\n",
                  b->stack_size, b->byte_code_len, local_count);

    if (local_count != 0) {
        bc_read_trace(s, "vars {\n");
        for(i = 0; i < local_count; i++) {
            JSVarDef *vd = &b->vardefs[i];
            if (bc_get_atom(s, &vd->var_name))
                goto fail;
            if (bc_get_leb128_int(s, &vd->scope_level))
                goto fail;
            if (bc_get_leb128_int(s, &vd->scope_next))
                goto fail;
            vd->scope_next--;
            if (bc_get_u8(s, &v8))
                goto fail;
            idx = 0;
            vd->var_kind = bc_get_flags(v8, &idx, 4);
            vd->is_const = bc_get_flags(v8, &idx, 1);
            vd->is_lexical = bc_get_flags(v8, &idx, 1);
            vd->is_captured = bc_get_flags(v8, &idx, 1);
#ifdef DUMP_READ_OBJECT
            bc_read_trace(s, "name: "); print_atom(s->ctx, vd->var_name); printf("\n");
#endif
        }
        bc_read_trace(s, "}\n");
    }
    if (b->closure_var_count != 0) {
        bc_read_trace(s, "closure vars {\n");
        for(i = 0; i < b->closure_var_count; i++) {
            JSClosureVar *cv = &b->closure_var[i];
            int var_idx;
            if (bc_get_atom(s, &cv->var_name))
                goto fail;
            if (bc_get_leb128_int(s, &var_idx))
                goto fail;
            cv->var_idx = var_idx;
            if (bc_get_u8(s, &v8))
                goto fail;
            idx = 0;
            cv->is_local = bc_get_flags(v8, &idx, 1);
            cv->is_arg = bc_get_flags(v8, &idx, 1);
            cv->is_const = bc_get_flags(v8, &idx, 1);
            cv->is_lexical = bc_get_flags(v8, &idx, 1);
            cv->var_kind = bc_get_flags(v8, &idx, 4);
#ifdef DUMP_READ_OBJECT
            bc_read_trace(s, "name: "); print_atom(s->ctx, cv->var_name); printf("\n");
#endif
        }
        bc_read_trace(s, "}\n");
    }
    {
        bc_read_trace(s, "bytecode {\n");
        if (JS_ReadFunctionBytecode(s, b, byte_code_offset, b->byte_code_len))
            goto fail;
        bc_read_trace(s, "}\n");
    }
    if (b->has_debug) {
        /* read optional debug information */
        bc_read_trace(s, "debug {\n");
        if (bc_get_atom(s, &b->debug.filename))
            goto fail;
        if (bc_get_leb128_int(s, &b->debug.line_num))
            goto fail;
        if (bc_get_leb128_int(s, &b->debug.pc2line_len))
            goto fail;
        if (b->debug.pc2line_len) {
            b->debug.pc2line_buf = (uint8_t*) js_mallocz(ctx, b->debug.pc2line_len);
            if (!b->debug.pc2line_buf)
                goto fail;
            if (bc_get_buf(s, b->debug.pc2line_buf, b->debug.pc2line_len))
                goto fail;
        }
#ifdef DUMP_READ_OBJECT
        bc_read_trace(s, "filename: "); print_atom(s->ctx, b->debug.filename); printf("\n");
#endif
        bc_read_trace(s, "}\n");
    }
    if (b->cpool_count != 0) {
        bc_read_trace(s, "cpool {\n");
        for(i = 0; i < b->cpool_count; i++) {
            JSValue val;
            val = JS_ReadObjectRec(s);
            if (JS_IsException(val))
                goto fail;
            b->cpool[i] = val;
        }
        bc_read_trace(s, "}\n");
    }
    b->realm = JS_DupContext(ctx);
    return obj;
 fail:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue JS_ReadModule(BCReaderState *s)
{
    JSContext *ctx = s->ctx;
    JSValue obj;
    JSModuleDef *m = NULL;
    JSAtom module_name;
    int i;
    uint8_t v8;

    if (bc_get_atom(s, &module_name))
        goto fail;
#ifdef DUMP_READ_OBJECT
    bc_read_trace(s, "name: "); print_atom(s->ctx, module_name); printf("\n");
#endif
    m = js_new_module_def(ctx, module_name);
    if (!m)
        goto fail;
    obj = JS_DupValue(ctx, JS_MKPTR(JS_TAG_MODULE, m));
    if (bc_get_leb128_int(s, &m->req_module_entries_count))
        goto fail;
    if (m->req_module_entries_count != 0) {
        m->req_module_entries_size = m->req_module_entries_count;
        m->req_module_entries = (JSReqModuleEntry*) js_mallocz(ctx, sizeof(m->req_module_entries[0]) * m->req_module_entries_size);
        if (!m->req_module_entries)
            goto fail;
        for(i = 0; i < m->req_module_entries_count; i++) {
            JSReqModuleEntry *rme = &m->req_module_entries[i];
            if (bc_get_atom(s, &rme->module_name))
                goto fail;
        }
    }

    if (bc_get_leb128_int(s, &m->export_entries_count))
        goto fail;
    if (m->export_entries_count != 0) {
        m->export_entries_size = m->export_entries_count;
        m->export_entries = (JSExportEntry*) js_mallocz(ctx, sizeof(m->export_entries[0]) * m->export_entries_size);
        if (!m->export_entries)
            goto fail;
        for(i = 0; i < m->export_entries_count; i++) {
            JSExportEntry *me = &m->export_entries[i];
            if (bc_get_u8(s, &v8))
                goto fail;
            me->export_type = (JSExportTypeEnum) v8;
            if (me->export_type == JS_EXPORT_TYPE_LOCAL) {
                if (bc_get_leb128_int(s, &me->u.local.var_idx))
                    goto fail;
            } else {
                if (bc_get_leb128_int(s, &me->u.req_module_idx))
                    goto fail;
                if (bc_get_atom(s, &me->local_name))
                    goto fail;
            }
            if (bc_get_atom(s, &me->export_name))
                goto fail;
        }
    }

    if (bc_get_leb128_int(s, &m->star_export_entries_count))
        goto fail;
    if (m->star_export_entries_count != 0) {
        m->star_export_entries_size = m->star_export_entries_count;
        m->star_export_entries = (JSStarExportEntry*) js_mallocz(ctx, sizeof(m->star_export_entries[0]) * m->star_export_entries_size);
        if (!m->star_export_entries)
            goto fail;
        for(i = 0; i < m->star_export_entries_count; i++) {
            JSStarExportEntry *se = &m->star_export_entries[i];
            if (bc_get_leb128_int(s, &se->req_module_idx))
                goto fail;
        }
    }

    if (bc_get_leb128_int(s, &m->import_entries_count))
        goto fail;
    if (m->import_entries_count != 0) {
        m->import_entries_size = m->import_entries_count;
        m->import_entries = (JSImportEntry*) js_mallocz(ctx, sizeof(m->import_entries[0]) * m->import_entries_size);
        if (!m->import_entries)
            goto fail;
        for(i = 0; i < m->import_entries_count; i++) {
            JSImportEntry *mi = &m->import_entries[i];
            if (bc_get_leb128_int(s, &mi->var_idx))
                goto fail;
            if (bc_get_atom(s, &mi->import_name))
                goto fail;
            if (bc_get_leb128_int(s, &mi->req_module_idx))
                goto fail;
        }
    }

    m->func_obj = JS_ReadObjectRec(s);
    if (JS_IsException(m->func_obj))
        goto fail;
    return obj;
 fail:
    if (m) {
        js_free_module_def(ctx, m);
    }
    return JS_EXCEPTION;
}

static JSValue JS_ReadObjectTag(BCReaderState *s)
{
    JSContext *ctx = s->ctx;
    JSValue obj;
    uint32_t prop_count, i;
    JSAtom atom;
    JSValue val;
    int ret;

    obj = JS_NewObject(ctx);
    if (BC_add_object_ref(s, obj))
        goto fail;
    if (bc_get_leb128(s, &prop_count))
        goto fail;
    for(i = 0; i < prop_count; i++) {
        if (bc_get_atom(s, &atom))
            goto fail;
#ifdef DUMP_READ_OBJECT
        bc_read_trace(s, "propname: "); print_atom(s->ctx, atom); printf("\n");
#endif
        val = JS_ReadObjectRec(s);
        if (JS_IsException(val)) {
            JS_FreeAtom(ctx, atom);
            goto fail;
        }
        ret = JS_DefinePropertyValue(ctx, obj, atom, val, JS_PROP_C_W_E);
        JS_FreeAtom(ctx, atom);
        if (ret < 0)
            goto fail;
    }
    return obj;
 fail:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue JS_ReadArray(BCReaderState *s, int tag)
{
    JSContext *ctx = s->ctx;
    JSValue obj;
    uint32_t len, i;
    JSValue val;
    int ret, prop_flags;
    BOOL is_template;

    obj = JS_NewArray(ctx);
    if (BC_add_object_ref(s, obj))
        goto fail;
    is_template = (tag == BC_TAG_TEMPLATE_OBJECT);
    if (bc_get_leb128(s, &len))
        goto fail;
    for(i = 0; i < len; i++) {
        val = JS_ReadObjectRec(s);
        if (JS_IsException(val))
            goto fail;
        if (is_template)
            prop_flags = JS_PROP_ENUMERABLE;
        else
            prop_flags = JS_PROP_C_W_E;
        ret = JS_DefinePropertyValueUint32(ctx, obj, i, val,
                                           prop_flags);
        if (ret < 0)
            goto fail;
    }
    if (is_template) {
        val = JS_ReadObjectRec(s);
        if (JS_IsException(val))
            goto fail;
        if (!JS_IsUndefined(val)) {
            ret = JS_DefinePropertyValue(ctx, obj, JS_ATOM_raw, val, 0);
            if (ret < 0)
                goto fail;
        }
        JS_PreventExtensions(ctx, obj);
    }
    return obj;
 fail:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue JS_ReadTypedArray(BCReaderState *s)
{
    JSContext *ctx = s->ctx;
    JSValue obj = JS_UNDEFINED, array_buffer = JS_UNDEFINED;
    uint8_t array_tag;
    JSValueConst args[3];
    uint32_t offset, len, idx;

    if (bc_get_u8(s, &array_tag))
        return JS_EXCEPTION;
    if (array_tag >= JS_TYPED_ARRAY_COUNT)
        return JS_ThrowTypeError(ctx, "invalid typed array");
    if (bc_get_leb128(s, &len))
        return JS_EXCEPTION;
    if (bc_get_leb128(s, &offset))
        return JS_EXCEPTION;
    /* XXX: this hack could be avoided if the typed array could be
       created before the array buffer */
    idx = s->objects_count;
    if (BC_add_object_ref1(s, NULL))
        goto fail;
    array_buffer = JS_ReadObjectRec(s);
    if (JS_IsException(array_buffer))
        return JS_EXCEPTION;
    if (!js_get_array_buffer(ctx, array_buffer)) {
        JS_FreeValue(ctx, array_buffer);
        return JS_EXCEPTION;
    }
    args[0] = array_buffer;
    args[1] = JS_NewInt64(ctx, offset);
    args[2] = JS_NewInt64(ctx, len);
    obj = js_typed_array_constructor(ctx, JS_UNDEFINED,
                                     3, args,
                                     JS_CLASS_UINT8C_ARRAY + array_tag);
    if (JS_IsException(obj))
        goto fail;
    if (s->allow_reference) {
        s->objects[idx] = JS_VALUE_GET_OBJ(obj);
    }
    JS_FreeValue(ctx, array_buffer);
    return obj;
 fail:
    JS_FreeValue(ctx, array_buffer);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue JS_ReadArrayBuffer(BCReaderState *s)
{
    JSContext *ctx = s->ctx;
    uint32_t byte_length;
    JSValue obj;

    if (bc_get_leb128(s, &byte_length))
        return JS_EXCEPTION;
    if (js_unlikely(s->buf_end - s->ptr < byte_length)) {
        bc_read_error_end(s);
        return JS_EXCEPTION;
    }
    obj = JS_NewArrayBufferCopy(ctx, s->ptr, byte_length);
    if (JS_IsException(obj))
        goto fail;
    if (BC_add_object_ref(s, obj))
        goto fail;
    s->ptr += byte_length;
    return obj;
 fail:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue JS_ReadSharedArrayBuffer(BCReaderState *s)
{
    JSContext *ctx = s->ctx;
    uint32_t byte_length;
    uint8_t *data_ptr;
    JSValue obj;
    uint64_t u64;

    if (bc_get_leb128(s, &byte_length))
        return JS_EXCEPTION;
    if (bc_get_u64(s, &u64))
        return JS_EXCEPTION;
    data_ptr = (uint8_t *)(uintptr_t)u64;
    /* the SharedArrayBuffer is cloned */
    obj = js_array_buffer_constructor3(ctx, JS_UNDEFINED, byte_length,
                                       JS_CLASS_SHARED_ARRAY_BUFFER,
                                       data_ptr,
                                       NULL, NULL, FALSE);
    if (JS_IsException(obj))
        goto fail;
    if (BC_add_object_ref(s, obj))
        goto fail;
    return obj;
 fail:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue JS_ReadDate(BCReaderState *s)
{
    JSContext *ctx = s->ctx;
    JSValue val, obj = JS_UNDEFINED;

    val = JS_ReadObjectRec(s);
    if (JS_IsException(val))
        goto fail;
    if (!JS_IsNumber(val)) {
        JS_ThrowTypeError(ctx, "Number tag expected for date");
        goto fail;
    }
    obj = JS_NewObjectProtoClass(ctx, ctx->class_proto[JS_CLASS_DATE],
                                 JS_CLASS_DATE);
    if (JS_IsException(obj))
        goto fail;
    if (BC_add_object_ref(s, obj))
        goto fail;
    JS_SetObjectData(ctx, obj, val);
    return obj;
 fail:
    JS_FreeValue(ctx, val);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue JS_ReadObjectValue(BCReaderState *s)
{
    JSContext *ctx = s->ctx;
    JSValue val, obj = JS_UNDEFINED;

    val = JS_ReadObjectRec(s);
    if (JS_IsException(val))
        goto fail;
    obj = JS_ToObject(ctx, val);
    if (JS_IsException(obj))
        goto fail;
    if (BC_add_object_ref(s, obj))
        goto fail;
    JS_FreeValue(ctx, val);
    return obj;
 fail:
    JS_FreeValue(ctx, val);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue JS_ReadObjectRec(BCReaderState *s)
{
    JSContext *ctx = s->ctx;
    uint8_t tag;
    JSValue obj = JS_UNDEFINED;

    if (js_check_stack_overflow(ctx->rt, 0))
        return JS_ThrowStackOverflow(ctx);

    if (bc_get_u8(s, &tag))
        return JS_EXCEPTION;

    bc_read_trace(s, "%s {\n", bc_tag_str[tag]);

    switch(tag) {
    case BC_TAG_NULL:
        obj = JS_NULL;
        break;
    case BC_TAG_UNDEFINED:
        obj = JS_UNDEFINED;
        break;
    case BC_TAG_BOOL_FALSE:
    case BC_TAG_BOOL_TRUE:
        obj = JS_NewBool(ctx, tag - BC_TAG_BOOL_FALSE);
        break;
    case BC_TAG_INT32:
        {
            int32_t val;
            if (bc_get_sleb128(s, &val))
                return JS_EXCEPTION;
            bc_read_trace(s, "%d\n", val);
            obj = JS_NewInt32(ctx, val);
        }
        break;
    case BC_TAG_FLOAT64:
        {
            JSFloat64Union u;
            if (bc_get_u64(s, &u.u64))
                return JS_EXCEPTION;
            bc_read_trace(s, "%g\n", u.d);
            obj = __JS_NewFloat64(ctx, u.d);
        }
        break;
    case BC_TAG_STRING:
        {
            JSString *p;
            p = JS_ReadString(s);
            if (!p)
                return JS_EXCEPTION;
            obj = JS_MKPTR(JS_TAG_STRING, p);
        }
        break;
    case BC_TAG_FUNCTION_BYTECODE:
        if (!s->allow_bytecode)
            goto invalid_tag;
        obj = JS_ReadFunctionTag(s);
        break;
    case BC_TAG_MODULE:
        if (!s->allow_bytecode)
            goto invalid_tag;
        obj = JS_ReadModule(s);
        break;
    case BC_TAG_OBJECT:
        obj = JS_ReadObjectTag(s);
        break;
    case BC_TAG_ARRAY:
    case BC_TAG_TEMPLATE_OBJECT:
        obj = JS_ReadArray(s, tag);
        break;
    case BC_TAG_TYPED_ARRAY:
        obj = JS_ReadTypedArray(s);
        break;
    case BC_TAG_ARRAY_BUFFER:
        obj = JS_ReadArrayBuffer(s);
        break;
    case BC_TAG_SHARED_ARRAY_BUFFER:
        if (!s->allow_sab || !ctx->rt->sab_funcs.sab_dup)
            goto invalid_tag;
        obj = JS_ReadSharedArrayBuffer(s);
        break;
    case BC_TAG_DATE:
        obj = JS_ReadDate(s);
        break;
    case BC_TAG_OBJECT_VALUE:
        obj = JS_ReadObjectValue(s);
        break;
#ifdef CONFIG_BIGNUM
    case BC_TAG_BIG_INT:
    case BC_TAG_BIG_FLOAT:
    case BC_TAG_BIG_DECIMAL:
        obj = JS_ReadBigNum(s, tag);
        break;
#endif
    case BC_TAG_OBJECT_REFERENCE:
        {
            uint32_t val;
            if (!s->allow_reference)
                return JS_ThrowSyntaxError(ctx, "object references are not allowed");
            if (bc_get_leb128(s, &val))
                return JS_EXCEPTION;
            bc_read_trace(s, "%u\n", val);
            if (val >= s->objects_count) {
                return JS_ThrowSyntaxError(ctx, "invalid object reference (%u >= %u)",
                                           val, s->objects_count);
            }
            obj = JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, s->objects[val]));
        }
        break;
    default:
    invalid_tag:
        return JS_ThrowSyntaxError(ctx, "invalid tag (tag=%d pos=%u)",
                                   tag, (unsigned int)(s->ptr - s->buf_start));
    }
    bc_read_trace(s, "}\n");
    return obj;
}

static int JS_ReadObjectAtoms(BCReaderState *s)
{
    uint8_t v8;
    JSString *p;
    int i;
    JSAtom atom;

    if (bc_get_u8(s, &v8))
        return -1;
    /* XXX: could support byte swapped input */
    if (v8 != BC_VERSION) {
        JS_ThrowSyntaxError(s->ctx, "invalid version (%d expected=%d)",
                            v8, BC_VERSION);
        return -1;
    }
    if (bc_get_leb128(s, &s->idx_to_atom_count))
        return -1;

    bc_read_trace(s, "%d atom indexes {\n", s->idx_to_atom_count);

    if (s->idx_to_atom_count != 0) {
        s->idx_to_atom = (JSAtom*) js_mallocz(s->ctx, s->idx_to_atom_count *
                                    sizeof(s->idx_to_atom[0]));
        if (!s->idx_to_atom)
            return s->error_state = -1;
    }
    for(i = 0; i < s->idx_to_atom_count; i++) {
        p = JS_ReadString(s);
        if (!p)
            return -1;
        atom = JS_NewAtomStr(s->ctx, p);
        if (atom == JS_ATOM_NULL)
            return s->error_state = -1;
        s->idx_to_atom[i] = atom;
        if (s->is_rom_data && (atom != (i + s->first_atom)))
            s->is_rom_data = FALSE; /* atoms must be relocated */
    }
    bc_read_trace(s, "}\n");
    return 0;
}

static void bc_reader_free(BCReaderState *s)
{
    int i;
    if (s->idx_to_atom) {
        for(i = 0; i < s->idx_to_atom_count; i++) {
            JS_FreeAtom(s->ctx, s->idx_to_atom[i]);
        }
        js_free(s->ctx, s->idx_to_atom);
    }
    js_free(s->ctx, s->objects);
}

inline JSValue JS_ReadObject(JSContext *ctx, const uint8_t *buf, size_t buf_len,
                       int flags)
{
    BCReaderState ss, *s = &ss;
    JSValue obj;

    ctx->binary_object_count += 1;
    ctx->binary_object_size += buf_len;

    memset(s, 0, sizeof(*s));
    s->ctx = ctx;
    s->buf_start = buf;
    s->buf_end = buf + buf_len;
    s->ptr = buf;
    s->allow_bytecode = ((flags & JS_READ_OBJ_BYTECODE) != 0);
    s->is_rom_data = ((flags & JS_READ_OBJ_ROM_DATA) != 0);
    s->allow_sab = ((flags & JS_READ_OBJ_SAB) != 0);
    s->allow_reference = ((flags & JS_READ_OBJ_REFERENCE) != 0);
    if (s->allow_bytecode)
        s->first_atom = JS_ATOM_END;
    else
        s->first_atom = 1;
    if (JS_ReadObjectAtoms(s)) {
        obj = JS_EXCEPTION;
    } else {
        obj = JS_ReadObjectRec(s);
    }
    bc_reader_free(s);
    return obj;
}

/*******************************************************************/
/* runtime functions & objects */

static JSValue js_string_constructor(JSContext *ctx, JSValueConst this_val,
                                     int argc, JSValueConst *argv);
static JSValue js_boolean_constructor(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv);
static JSValue js_number_constructor(JSContext *ctx, JSValueConst this_val,
                                     int argc, JSValueConst *argv);

static int check_function(JSContext *ctx, JSValueConst obj)
{
    if (js_likely(JS_IsFunction(ctx, obj)))
        return 0;
    JS_ThrowTypeError(ctx, "not a function");
    return -1;
}

static int check_exception_free(JSContext *ctx, JSValue obj)
{
    JS_FreeValue(ctx, obj);
    return JS_IsException(obj);
}

static JSAtom find_atom(JSContext *ctx, const char *name)
{
    JSAtom atom;
    int len;

    if (*name == '[') {
        name++;
        len = strlen(name) - 1;
        /* We assume 8 bit non null strings, which is the case for these
           symbols */
        for(atom = JS_ATOM_Symbol_toPrimitive; atom < JS_ATOM_END; atom++) {
            JSAtomStruct *p = ctx->rt->atom_array[atom];
            JSString *str = p;
            if (str->len == len && !memcmp(str->u.str8, name, len))
                return JS_DupAtom(ctx, atom);
        }
        abort();
    } else {
        atom = JS_NewAtom(ctx, name);
    }
    return atom;
}

static JSValue JS_InstantiateFunctionListItem2(JSContext *ctx, JSObject *p,
                                               JSAtom atom, void *opaque)
{
    auto e = (const JSCFunctionListEntry*) opaque;
    JSValue val;

    switch(e->def_type) {
    case JS_DEF_CFUNC:
        val = JS_NewCFunction2(ctx, e->u.func.cfunc.generic,
                               e->name, e->u.func.length, (JSCFunctionEnum) e->u.func.cproto, e->magic);
        break;
    case JS_DEF_PROP_STRING:
        val = JS_NewAtomString(ctx, e->u.str);
        break;
    case JS_DEF_OBJECT:
        val = JS_NewObject(ctx);
        JS_SetPropertyFunctionList(ctx, val, e->u.prop_list.tab, e->u.prop_list.len);
        break;
    default:
        abort();
    }
    return val;
}

static int JS_InstantiateFunctionListItem(JSContext *ctx, JSValueConst obj,
                                          JSAtom atom,
                                          const JSCFunctionListEntry *e)
{
    JSValue val;
    int prop_flags = e->prop_flags;

    switch(e->def_type) {
    case JS_DEF_ALIAS: /* using autoinit for aliases is not safe */
        {
            JSAtom atom1 = find_atom(ctx, e->u.alias.name);
            switch (e->u.alias.base) {
            case -1:
                val = JS_GetProperty(ctx, obj, atom1);
                break;
            case 0:
                val = JS_GetProperty(ctx, ctx->global_obj, atom1);
                break;
            case 1:
                val = JS_GetProperty(ctx, ctx->class_proto[JS_CLASS_ARRAY], atom1);
                break;
            default:
                abort();
            }
            JS_FreeAtom(ctx, atom1);
            if (atom == JS_ATOM_Symbol_toPrimitive) {
                /* Symbol.toPrimitive functions are not writable */
                prop_flags = JS_PROP_CONFIGURABLE;
            } else if (atom == JS_ATOM_Symbol_hasInstance) {
                /* Function.prototype[Symbol.hasInstance] is not writable nor configurable */
                prop_flags = 0;
            }
        }
        break;
    case JS_DEF_CFUNC:
        if (atom == JS_ATOM_Symbol_toPrimitive) {
            /* Symbol.toPrimitive functions are not writable */
            prop_flags = JS_PROP_CONFIGURABLE;
        } else if (atom == JS_ATOM_Symbol_hasInstance) {
            /* Function.prototype[Symbol.hasInstance] is not writable nor configurable */
            prop_flags = 0;
        }
        JS_DefineAutoInitProperty(ctx, obj, atom, JS_AUTOINIT_ID_PROP,
                                  (void *)e, prop_flags);
        return 0;
    case JS_DEF_CGETSET: /* XXX: use autoinit again ? */
    case JS_DEF_CGETSET_MAGIC:
        {
            JSValue getter, setter;
            char buf[64];

            getter = JS_UNDEFINED;
            if (e->u.getset.get.generic) {
                snprintf(buf, sizeof(buf), "get %s", e->name);
                getter = JS_NewCFunction2(ctx, e->u.getset.get.generic,
                                          buf, 0, e->def_type == JS_DEF_CGETSET_MAGIC ? JS_CFUNC_getter_magic : JS_CFUNC_getter,
                                          e->magic);
            }
            setter = JS_UNDEFINED;
            if (e->u.getset.set.generic) {
                snprintf(buf, sizeof(buf), "set %s", e->name);
                setter = JS_NewCFunction2(ctx, e->u.getset.set.generic,
                                          buf, 1, e->def_type == JS_DEF_CGETSET_MAGIC ? JS_CFUNC_setter_magic : JS_CFUNC_setter,
                                          e->magic);
            }
            JS_DefinePropertyGetSet(ctx, obj, atom, getter, setter, prop_flags);
            return 0;
        }
        break;
    case JS_DEF_PROP_INT32:
        val = JS_NewInt32(ctx, e->u.i32);
        break;
    case JS_DEF_PROP_INT64:
        val = JS_NewInt64(ctx, e->u.i64);
        break;
    case JS_DEF_PROP_DOUBLE:
        val = __JS_NewFloat64(ctx, e->u.f64);
        break;
    case JS_DEF_PROP_UNDEFINED:
        val = JS_UNDEFINED;
        break;
    case JS_DEF_PROP_STRING:
    case JS_DEF_OBJECT:
        JS_DefineAutoInitProperty(ctx, obj, atom, JS_AUTOINIT_ID_PROP,
                                  (void *)e, prop_flags);
        return 0;
    default:
        abort();
    }
    JS_DefinePropertyValue(ctx, obj, atom, val, prop_flags);
    return 0;
}

inline void JS_SetPropertyFunctionList(JSContext *ctx, JSValueConst obj,
                                const JSCFunctionListEntry *tab, int len)
{
    int i;

    for (i = 0; i < len; i++) {
        const JSCFunctionListEntry *e = &tab[i];
        JSAtom atom = find_atom(ctx, e->name);
        JS_InstantiateFunctionListItem(ctx, obj, atom, e);
        JS_FreeAtom(ctx, atom);
    }
}

inline int JS_AddModuleExportList(JSContext *ctx, JSModuleDef *m,
                           const JSCFunctionListEntry *tab, int len)
{
    int i;
    for(i = 0; i < len; i++) {
        if (JS_AddModuleExport(ctx, m, tab[i].name))
            return -1;
    }
    return 0;
}

inline int JS_SetModuleExportList(JSContext *ctx, JSModuleDef *m,
                           const JSCFunctionListEntry *tab, int len)
{
    int i;
    JSValue val;

    for(i = 0; i < len; i++) {
        const JSCFunctionListEntry *e = &tab[i];
        switch(e->def_type) {
        case JS_DEF_CFUNC:
            val = JS_NewCFunction2(ctx, e->u.func.cfunc.generic,
                                   e->name, e->u.func.length, (JSCFunctionEnum) e->u.func.cproto, e->magic);
            break;
        case JS_DEF_PROP_STRING:
            val = JS_NewString(ctx, e->u.str);
            break;
        case JS_DEF_PROP_INT32:
            val = JS_NewInt32(ctx, e->u.i32);
            break;
        case JS_DEF_PROP_INT64:
            val = JS_NewInt64(ctx, e->u.i64);
            break;
        case JS_DEF_PROP_DOUBLE:
            val = __JS_NewFloat64(ctx, e->u.f64);
            break;
        case JS_DEF_OBJECT:
            val = JS_NewObject(ctx);
            JS_SetPropertyFunctionList(ctx, val, e->u.prop_list.tab, e->u.prop_list.len);
            break;
        default:
            abort();
        }
        if (JS_SetModuleExport(ctx, m, e->name, val))
            return -1;
    }
    return 0;
}

/* Note: 'func_obj' is not necessarily a constructor */
static void JS_SetConstructor2(JSContext *ctx,
                               JSValueConst func_obj,
                               JSValueConst proto,
                               int proto_flags, int ctor_flags)
{
    JS_DefinePropertyValue(ctx, func_obj, JS_ATOM_prototype,
                           JS_DupValue(ctx, proto), proto_flags);
    JS_DefinePropertyValue(ctx, proto, JS_ATOM_constructor,
                           JS_DupValue(ctx, func_obj),
                           ctor_flags);
    set_cycle_flag(ctx, func_obj);
    set_cycle_flag(ctx, proto);
}

inline void JS_SetConstructor(JSContext *ctx, JSValueConst func_obj,
                       JSValueConst proto)
{
    JS_SetConstructor2(ctx, func_obj, proto,
                       0, JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
}

static void JS_NewGlobalCConstructor2(JSContext *ctx,
                                      JSValue func_obj,
                                      const char *name,
                                      JSValueConst proto)
{
    JS_DefinePropertyValueStr(ctx, ctx->global_obj, name,
                           JS_DupValue(ctx, func_obj),
                           JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
    JS_SetConstructor(ctx, func_obj, proto);
    JS_FreeValue(ctx, func_obj);
}

static JSValueConst JS_NewGlobalCConstructor(JSContext *ctx, const char *name,
                                             JSCFunction *func, int length,
                                             JSValueConst proto)
{
    JSValue func_obj;
    func_obj = JS_NewCFunction2(ctx, func, name, length, JS_CFUNC_constructor_or_func, 0);
    JS_NewGlobalCConstructor2(ctx, func_obj, name, proto);
    return func_obj;
}

static JSValueConst JS_NewGlobalCConstructorOnly(JSContext *ctx, const char *name,
                                                 JSCFunction *func, int length,
                                                 JSValueConst proto)
{
    JSValue func_obj;
    func_obj = JS_NewCFunction2(ctx, func, name, length, JS_CFUNC_constructor, 0);
    JS_NewGlobalCConstructor2(ctx, func_obj, name, proto);
    return func_obj;
}

static JSValue js_global_eval(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv)
{
    return JS_EvalObject(ctx, ctx->global_obj, argv[0], JS_EVAL_TYPE_INDIRECT, -1);
}

static JSValue js_global_isNaN(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv)
{
    double d;

    /* XXX: does this work for bigfloat? */
    if (js_unlikely(JS_ToFloat64(ctx, &d, argv[0])))
        return JS_EXCEPTION;
    return JS_NewBool(ctx, isnan(d));
}

static JSValue js_global_isFinite(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    BOOL res;
    double d;
    if (js_unlikely(JS_ToFloat64(ctx, &d, argv[0])))
        return JS_EXCEPTION;
    res = isfinite(d);
    return JS_NewBool(ctx, res);
}

/* Object class */

static JSValue JS_ToObject(JSContext *ctx, JSValueConst val)
{
    int tag = JS_VALUE_GET_NORM_TAG(val);
    JSValue obj;

    switch(tag) {
    default:
    case JS_TAG_NULL:
    case JS_TAG_UNDEFINED:
        return JS_ThrowTypeError(ctx, "cannot convert to object");
    case JS_TAG_OBJECT:
    case JS_TAG_EXCEPTION:
        return JS_DupValue(ctx, val);
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
        obj = JS_NewObjectClass(ctx, JS_CLASS_BIG_INT);
        goto set_value;
    case JS_TAG_BIG_FLOAT:
        obj = JS_NewObjectClass(ctx, JS_CLASS_BIG_FLOAT);
        goto set_value;
    case JS_TAG_BIG_DECIMAL:
        obj = JS_NewObjectClass(ctx, JS_CLASS_BIG_DECIMAL);
        goto set_value;
#endif
    case JS_TAG_INT:
    case JS_TAG_FLOAT64:
        obj = JS_NewObjectClass(ctx, JS_CLASS_NUMBER);
        goto set_value;
    case JS_TAG_STRING:
        /* XXX: should call the string constructor */
        {
            JSString *p1 = JS_VALUE_GET_STRING(val);
            obj = JS_NewObjectClass(ctx, JS_CLASS_STRING);
            JS_DefinePropertyValue(ctx, obj, JS_ATOM_length, JS_NewInt32(ctx, p1->len), 0);
        }
        goto set_value;
    case JS_TAG_BOOL:
        obj = JS_NewObjectClass(ctx, JS_CLASS_BOOLEAN);
        goto set_value;
    case JS_TAG_SYMBOL:
        obj = JS_NewObjectClass(ctx, JS_CLASS_SYMBOL);
    set_value:
        if (!JS_IsException(obj))
            JS_SetObjectData(ctx, obj, JS_DupValue(ctx, val));
        return obj;
    }
}

static JSValue JS_ToObjectFree(JSContext *ctx, JSValue val)
{
    JSValue obj = JS_ToObject(ctx, val);
    JS_FreeValue(ctx, val);
    return obj;
}

static int js_obj_to_desc(JSContext *ctx, JSPropertyDescriptor *d,
                          JSValueConst desc)
{
    JSValue val, getter, setter;
    int flags;

    if (!JS_IsObject(desc)) {
        JS_ThrowTypeErrorNotAnObject(ctx);
        return -1;
    }
    flags = 0;
    val = JS_UNDEFINED;
    getter = JS_UNDEFINED;
    setter = JS_UNDEFINED;
    if (JS_HasProperty(ctx, desc, JS_ATOM_configurable)) {
        JSValue prop = JS_GetProperty(ctx, desc, JS_ATOM_configurable);
        if (JS_IsException(prop))
            goto fail;
        flags |= JS_PROP_HAS_CONFIGURABLE;
        if (JS_ToBoolFree(ctx, prop))
            flags |= JS_PROP_CONFIGURABLE;
    }
    if (JS_HasProperty(ctx, desc, JS_ATOM_writable)) {
        JSValue prop = JS_GetProperty(ctx, desc, JS_ATOM_writable);
        if (JS_IsException(prop))
            goto fail;
        flags |= JS_PROP_HAS_WRITABLE;
        if (JS_ToBoolFree(ctx, prop))
            flags |= JS_PROP_WRITABLE;
    }
    if (JS_HasProperty(ctx, desc, JS_ATOM_enumerable)) {
        JSValue prop = JS_GetProperty(ctx, desc, JS_ATOM_enumerable);
        if (JS_IsException(prop))
            goto fail;
        flags |= JS_PROP_HAS_ENUMERABLE;
        if (JS_ToBoolFree(ctx, prop))
            flags |= JS_PROP_ENUMERABLE;
    }
    if (JS_HasProperty(ctx, desc, JS_ATOM_value)) {
        flags |= JS_PROP_HAS_VALUE;
        val = JS_GetProperty(ctx, desc, JS_ATOM_value);
        if (JS_IsException(val))
            goto fail;
    }
    if (JS_HasProperty(ctx, desc, JS_ATOM_get)) {
        flags |= JS_PROP_HAS_GET;
        getter = JS_GetProperty(ctx, desc, JS_ATOM_get);
        if (JS_IsException(getter) ||
            !(JS_IsUndefined(getter) || JS_IsFunction(ctx, getter))) {
            JS_ThrowTypeError(ctx, "invalid getter");
            goto fail;
        }
    }
    if (JS_HasProperty(ctx, desc, JS_ATOM_set)) {
        flags |= JS_PROP_HAS_SET;
        setter = JS_GetProperty(ctx, desc, JS_ATOM_set);
        if (JS_IsException(setter) ||
            !(JS_IsUndefined(setter) || JS_IsFunction(ctx, setter))) {
            JS_ThrowTypeError(ctx, "invalid setter");
            goto fail;
        }
    }
    if ((flags & (JS_PROP_HAS_SET | JS_PROP_HAS_GET)) &&
        (flags & (JS_PROP_HAS_VALUE | JS_PROP_HAS_WRITABLE))) {
        JS_ThrowTypeError(ctx, "cannot have setter/getter and value or writable");
        goto fail;
    }
    d->flags = flags;
    d->value = val;
    d->getter = getter;
    d->setter = setter;
    return 0;
 fail:
    JS_FreeValue(ctx, val);
    JS_FreeValue(ctx, getter);
    JS_FreeValue(ctx, setter);
    return -1;
}

[[nodiscard]] static int JS_DefinePropertyDesc(JSContext *ctx, JSValueConst obj,
                                             JSAtom prop, JSValueConst desc,
                                             int flags)
{
    JSPropertyDescriptor d;
    int ret;

    if (js_obj_to_desc(ctx, &d, desc) < 0)
        return -1;

    ret = JS_DefineProperty(ctx, obj, prop,
                            d.value, d.getter, d.setter, d.flags | flags);
    js_free_desc(ctx, &d);
    return ret;
}

[[nodiscard]] static int JS_ObjectDefineProperties(JSContext *ctx,
                                                 JSValueConst obj,
                                                 JSValueConst properties)
{
    JSValue props, desc;
    JSObject *p;
    JSPropertyEnum *atoms;
    uint32_t len, i;
    int ret = -1;

    if (!JS_IsObject(obj)) {
        JS_ThrowTypeErrorNotAnObject(ctx);
        return -1;
    }
    desc = JS_UNDEFINED;
    props = JS_ToObject(ctx, properties);
    if (JS_IsException(props))
        return -1;
    p = JS_VALUE_GET_OBJ(props);
    if (JS_GetOwnPropertyNamesInternal(ctx, &atoms, &len, p, JS_GPN_ENUM_ONLY | JS_GPN_STRING_MASK | JS_GPN_SYMBOL_MASK) < 0)
        goto exception;
    for(i = 0; i < len; i++) {
        JS_FreeValue(ctx, desc);
        desc = JS_GetProperty(ctx, props, atoms[i].atom);
        if (JS_IsException(desc))
            goto exception;
        if (JS_DefinePropertyDesc(ctx, obj, atoms[i].atom, desc, JS_PROP_THROW) < 0)
            goto exception;
    }
    ret = 0;

exception:
    js_free_prop_enum(ctx, atoms, len);
    JS_FreeValue(ctx, props);
    JS_FreeValue(ctx, desc);
    return ret;
}

static JSValue js_object_constructor(JSContext *ctx, JSValueConst new_target,
                                     int argc, JSValueConst *argv)
{
    JSValue ret;
    if (!JS_IsUndefined(new_target) &&
        JS_VALUE_GET_OBJ(new_target) !=
        JS_VALUE_GET_OBJ(JS_GetActiveFunction(ctx))) {
        ret = js_create_from_ctor(ctx, new_target, JS_CLASS_OBJECT);
    } else {
        int tag = JS_VALUE_GET_NORM_TAG(argv[0]);
        switch(tag) {
        case JS_TAG_NULL:
        case JS_TAG_UNDEFINED:
            ret = JS_NewObject(ctx);
            break;
        default:
            ret = JS_ToObject(ctx, argv[0]);
            break;
        }
    }
    return ret;
}

static JSValue js_object_create(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSValueConst proto, props;
    JSValue obj;

    proto = argv[0];
    if (!JS_IsObject(proto) && !JS_IsNull(proto))
        return JS_ThrowTypeError(ctx, "not a prototype");
    obj = JS_NewObjectProto(ctx, proto);
    if (JS_IsException(obj))
        return JS_EXCEPTION;
    props = argv[1];
    if (!JS_IsUndefined(props)) {
        if (JS_ObjectDefineProperties(ctx, obj, props)) {
            JS_FreeValue(ctx, obj);
            return JS_EXCEPTION;
        }
    }
    return obj;
}

static JSValue js_object_getPrototypeOf(JSContext *ctx, JSValueConst this_val,
                                        int argc, JSValueConst *argv, int magic)
{
    JSValueConst val;

    val = argv[0];
    if (JS_VALUE_GET_TAG(val) != JS_TAG_OBJECT) {
        /* ES6 feature non compatible with ES5.1: primitive types are
           accepted */
        if (magic || JS_VALUE_GET_TAG(val) == JS_TAG_NULL ||
            JS_VALUE_GET_TAG(val) == JS_TAG_UNDEFINED)
            return JS_ThrowTypeErrorNotAnObject(ctx);
    }
    return JS_GetPrototype(ctx, val);
}

static JSValue js_object_setPrototypeOf(JSContext *ctx, JSValueConst this_val,
                                        int argc, JSValueConst *argv)
{
    JSValueConst obj;
    obj = argv[0];
    if (JS_SetPrototypeInternal(ctx, obj, argv[1], TRUE) < 0)
        return JS_EXCEPTION;
    return JS_DupValue(ctx, obj);
}

/* magic = 1 if called as Reflect.defineProperty */
static JSValue js_object_defineProperty(JSContext *ctx, JSValueConst this_val,
                                        int argc, JSValueConst *argv, int magic)
{
    JSValueConst obj, prop, desc;
    int ret, flags;
    JSAtom atom;

    obj = argv[0];
    prop = argv[1];
    desc = argv[2];

    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);
    atom = JS_ValueToAtom(ctx, prop);
    if (js_unlikely(atom == JS_ATOM_NULL))
        return JS_EXCEPTION;
    flags = 0;
    if (!magic)
        flags |= JS_PROP_THROW;
    ret = JS_DefinePropertyDesc(ctx, obj, atom, desc, flags);
    JS_FreeAtom(ctx, atom);
    if (ret < 0) {
        return JS_EXCEPTION;
    } else if (magic) {
        return JS_NewBool(ctx, ret);
    } else {
        return JS_DupValue(ctx, obj);
    }
}

static JSValue js_object_defineProperties(JSContext *ctx, JSValueConst this_val,
                                          int argc, JSValueConst *argv)
{
    // defineProperties(obj, properties)
    JSValueConst obj = argv[0];

    if (JS_ObjectDefineProperties(ctx, obj, argv[1]))
        return JS_EXCEPTION;
    else
        return JS_DupValue(ctx, obj);
}

/* magic = 1 if called as __defineSetter__ */
static JSValue js_object___defineGetter__(JSContext *ctx, JSValueConst this_val,
                                          int argc, JSValueConst *argv, int magic)
{
    JSValue obj;
    JSValueConst prop, value, get, set;
    int ret, flags;
    JSAtom atom;

    prop = argv[0];
    value = argv[1];

    obj = JS_ToObject(ctx, this_val);
    if (JS_IsException(obj))
        return JS_EXCEPTION;

    if (check_function(ctx, value)) {
        JS_FreeValue(ctx, obj);
        return JS_EXCEPTION;
    }
    atom = JS_ValueToAtom(ctx, prop);
    if (js_unlikely(atom == JS_ATOM_NULL)) {
        JS_FreeValue(ctx, obj);
        return JS_EXCEPTION;
    }
    flags = JS_PROP_THROW |
        JS_PROP_HAS_ENUMERABLE | JS_PROP_ENUMERABLE |
        JS_PROP_HAS_CONFIGURABLE | JS_PROP_CONFIGURABLE;
    if (magic) {
        get = JS_UNDEFINED;
        set = value;
        flags |= JS_PROP_HAS_SET;
    } else {
        get = value;
        set = JS_UNDEFINED;
        flags |= JS_PROP_HAS_GET;
    }
    ret = JS_DefineProperty(ctx, obj, atom, JS_UNDEFINED, get, set, flags);
    JS_FreeValue(ctx, obj);
    JS_FreeAtom(ctx, atom);
    if (ret < 0) {
        return JS_EXCEPTION;
    } else {
        return JS_UNDEFINED;
    }
}

static JSValue js_object_getOwnPropertyDescriptor(JSContext *ctx, JSValueConst this_val,
                                                  int argc, JSValueConst *argv, int magic)
{
    JSValueConst prop;
    JSAtom atom;
    JSValue ret, obj;
    JSPropertyDescriptor desc;
    int res, flags;

    if (magic) {
        /* Reflect.getOwnPropertyDescriptor case */
        if (JS_VALUE_GET_TAG(argv[0]) != JS_TAG_OBJECT)
            return JS_ThrowTypeErrorNotAnObject(ctx);
        obj = JS_DupValue(ctx, argv[0]);
    } else {
        obj = JS_ToObject(ctx, argv[0]);
        if (JS_IsException(obj))
            return obj;
    }
    prop = argv[1];
    atom = JS_ValueToAtom(ctx, prop);
    if (js_unlikely(atom == JS_ATOM_NULL))
        goto exception;
    ret = JS_UNDEFINED;
    if (JS_VALUE_GET_TAG(obj) == JS_TAG_OBJECT) {
        res = JS_GetOwnPropertyInternal(ctx, &desc, JS_VALUE_GET_OBJ(obj), atom);
        if (res < 0)
            goto exception;
        if (res) {
            ret = JS_NewObject(ctx);
            if (JS_IsException(ret))
                goto exception1;
            flags = JS_PROP_C_W_E | JS_PROP_THROW;
            if (desc.flags & JS_PROP_GETSET) {
                if (JS_DefinePropertyValue(ctx, ret, JS_ATOM_get, JS_DupValue(ctx, desc.getter), flags) < 0
                ||  JS_DefinePropertyValue(ctx, ret, JS_ATOM_set, JS_DupValue(ctx, desc.setter), flags) < 0)
                    goto exception1;
            } else {
                if (JS_DefinePropertyValue(ctx, ret, JS_ATOM_value, JS_DupValue(ctx, desc.value), flags) < 0
                ||  JS_DefinePropertyValue(ctx, ret, JS_ATOM_writable,
                                           JS_NewBool(ctx, (desc.flags & JS_PROP_WRITABLE) != 0), flags) < 0)
                    goto exception1;
            }
            if (JS_DefinePropertyValue(ctx, ret, JS_ATOM_enumerable,
                                       JS_NewBool(ctx, (desc.flags & JS_PROP_ENUMERABLE) != 0), flags) < 0
            ||  JS_DefinePropertyValue(ctx, ret, JS_ATOM_configurable,
                                       JS_NewBool(ctx, (desc.flags & JS_PROP_CONFIGURABLE) != 0), flags) < 0)
                goto exception1;
            js_free_desc(ctx, &desc);
        }
    }
    JS_FreeAtom(ctx, atom);
    JS_FreeValue(ctx, obj);
    return ret;

exception1:
    js_free_desc(ctx, &desc);
    JS_FreeValue(ctx, ret);
exception:
    JS_FreeAtom(ctx, atom);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_object_getOwnPropertyDescriptors(JSContext *ctx, JSValueConst this_val,
                                                   int argc, JSValueConst *argv)
{
    //getOwnPropertyDescriptors(obj)
    JSValue obj, r;
    JSObject *p;
    JSPropertyEnum *props;
    uint32_t len, i;

    r = JS_UNDEFINED;
    obj = JS_ToObject(ctx, argv[0]);
    if (JS_IsException(obj))
        return JS_EXCEPTION;

    p = JS_VALUE_GET_OBJ(obj);
    if (JS_GetOwnPropertyNamesInternal(ctx, &props, &len, p,
                               JS_GPN_STRING_MASK | JS_GPN_SYMBOL_MASK))
        goto exception;
    r = JS_NewObject(ctx);
    if (JS_IsException(r))
        goto exception;
    for(i = 0; i < len; i++) {
        JSValue atomValue, desc;
        JSValueConst args[2];

        atomValue = JS_AtomToValue(ctx, props[i].atom);
        if (JS_IsException(atomValue))
            goto exception;
        args[0] = obj;
        args[1] = atomValue;
        desc = js_object_getOwnPropertyDescriptor(ctx, JS_UNDEFINED, 2, args, 0);
        JS_FreeValue(ctx, atomValue);
        if (JS_IsException(desc))
            goto exception;
        if (!JS_IsUndefined(desc)) {
            if (JS_DefinePropertyValue(ctx, r, props[i].atom, desc,
                                       JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                goto exception;
        }
    }
    js_free_prop_enum(ctx, props, len);
    JS_FreeValue(ctx, obj);
    return r;

exception:
    js_free_prop_enum(ctx, props, len);
    JS_FreeValue(ctx, obj);
    JS_FreeValue(ctx, r);
    return JS_EXCEPTION;
}

static JSValue JS_GetOwnPropertyNames2(JSContext *ctx, JSValueConst obj1,
                                       int flags, int kind)
{
    JSValue obj, r, val, key, value;
    JSObject *p;
    JSPropertyEnum *atoms;
    uint32_t len, i, j;

    r = JS_UNDEFINED;
    val = JS_UNDEFINED;
    obj = JS_ToObject(ctx, obj1);
    if (JS_IsException(obj))
        return JS_EXCEPTION;
    p = JS_VALUE_GET_OBJ(obj);
    if (JS_GetOwnPropertyNamesInternal(ctx, &atoms, &len, p, flags & ~JS_GPN_ENUM_ONLY))
        goto exception;
    r = JS_NewArray(ctx);
    if (JS_IsException(r))
        goto exception;
    for(j = i = 0; i < len; i++) {
        JSAtom atom = atoms[i].atom;
        if (flags & JS_GPN_ENUM_ONLY) {
            JSPropertyDescriptor desc;
            int res;

            /* Check if property is still enumerable */
            res = JS_GetOwnPropertyInternal(ctx, &desc, p, atom);
            if (res < 0)
                goto exception;
            if (!res)
                continue;
            js_free_desc(ctx, &desc);
            if (!(desc.flags & JS_PROP_ENUMERABLE))
                continue;
        }
        switch(kind) {
        default:
        case JS_ITERATOR_KIND_KEY:
            val = JS_AtomToValue(ctx, atom);
            if (JS_IsException(val))
                goto exception;
            break;
        case JS_ITERATOR_KIND_VALUE:
            val = JS_GetProperty(ctx, obj, atom);
            if (JS_IsException(val))
                goto exception;
            break;
        case JS_ITERATOR_KIND_KEY_AND_VALUE:
            val = JS_NewArray(ctx);
            if (JS_IsException(val))
                goto exception;
            key = JS_AtomToValue(ctx, atom);
            if (JS_IsException(key))
                goto exception1;
            if (JS_CreateDataPropertyUint32(ctx, val, 0, key, JS_PROP_THROW) < 0)
                goto exception1;
            value = JS_GetProperty(ctx, obj, atom);
            if (JS_IsException(value))
                goto exception1;
            if (JS_CreateDataPropertyUint32(ctx, val, 1, value, JS_PROP_THROW) < 0)
                goto exception1;
            break;
        }
        if (JS_CreateDataPropertyUint32(ctx, r, j++, val, 0) < 0)
            goto exception;
    }
    goto done;

exception1:
    JS_FreeValue(ctx, val);
exception:
    JS_FreeValue(ctx, r);
    r = JS_EXCEPTION;
done:
    js_free_prop_enum(ctx, atoms, len);
    JS_FreeValue(ctx, obj);
    return r;
}

static JSValue js_object_getOwnPropertyNames(JSContext *ctx, JSValueConst this_val,
                                             int argc, JSValueConst *argv)
{
    return JS_GetOwnPropertyNames2(ctx, argv[0],
                                   JS_GPN_STRING_MASK, JS_ITERATOR_KIND_KEY);
}

static JSValue js_object_getOwnPropertySymbols(JSContext *ctx, JSValueConst this_val,
                                             int argc, JSValueConst *argv)
{
    return JS_GetOwnPropertyNames2(ctx, argv[0],
                                   JS_GPN_SYMBOL_MASK, JS_ITERATOR_KIND_KEY);
}

static JSValue js_object_keys(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv, int kind)
{
    return JS_GetOwnPropertyNames2(ctx, argv[0],
                                   JS_GPN_ENUM_ONLY | JS_GPN_STRING_MASK, kind);
}

static JSValue js_object_isExtensible(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv, int reflect)
{
    JSValueConst obj;
    int ret;

    obj = argv[0];
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT) {
        if (reflect)
            return JS_ThrowTypeErrorNotAnObject(ctx);
        else
            return JS_FALSE;
    }
    ret = JS_IsExtensible(ctx, obj);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_object_preventExtensions(JSContext *ctx, JSValueConst this_val,
                                           int argc, JSValueConst *argv, int reflect)
{
    JSValueConst obj;
    int ret;

    obj = argv[0];
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT) {
        if (reflect)
            return JS_ThrowTypeErrorNotAnObject(ctx);
        else
            return JS_DupValue(ctx, obj);
    }
    ret = JS_PreventExtensions(ctx, obj);
    if (ret < 0)
        return JS_EXCEPTION;
    if (reflect) {
        return JS_NewBool(ctx, ret);
    } else {
        if (!ret)
            return JS_ThrowTypeError(ctx, "proxy preventExtensions handler returned false");
        return JS_DupValue(ctx, obj);
    }
}

static JSValue js_object_hasOwnProperty(JSContext *ctx, JSValueConst this_val,
                                        int argc, JSValueConst *argv)
{
    JSValue obj;
    JSAtom atom;
    JSObject *p;
    BOOL ret;

    atom = JS_ValueToAtom(ctx, argv[0]); /* must be done first */
    if (js_unlikely(atom == JS_ATOM_NULL))
        return JS_EXCEPTION;
    obj = JS_ToObject(ctx, this_val);
    if (JS_IsException(obj)) {
        JS_FreeAtom(ctx, atom);
        return obj;
    }
    p = JS_VALUE_GET_OBJ(obj);
    ret = JS_GetOwnPropertyInternal(ctx, NULL, p, atom);
    JS_FreeAtom(ctx, atom);
    JS_FreeValue(ctx, obj);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_object_hasOwn(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSValue obj;
    JSAtom atom;
    JSObject *p;
    BOOL ret;

    obj = JS_ToObject(ctx, argv[0]);
    if (JS_IsException(obj))
        return obj;
    atom = JS_ValueToAtom(ctx, argv[1]);
    if (js_unlikely(atom == JS_ATOM_NULL)) {
        JS_FreeValue(ctx, obj);
        return JS_EXCEPTION;
    }
    p = JS_VALUE_GET_OBJ(obj);
    ret = JS_GetOwnPropertyInternal(ctx, NULL, p, atom);
    JS_FreeAtom(ctx, atom);
    JS_FreeValue(ctx, obj);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_object_valueOf(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    return JS_ToObject(ctx, this_val);
}

static JSValue js_object_toString(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    JSValue obj, tag;
    int is_array;
    JSAtom atom;
    JSObject *p;

    if (JS_IsNull(this_val)) {
        tag = JS_NewString(ctx, "Null");
    } else if (JS_IsUndefined(this_val)) {
        tag = JS_NewString(ctx, "Undefined");
    } else {
        obj = JS_ToObject(ctx, this_val);
        if (JS_IsException(obj))
            return obj;
        is_array = JS_IsArray(ctx, obj);
        if (is_array < 0) {
            JS_FreeValue(ctx, obj);
            return JS_EXCEPTION;
        }
        if (is_array) {
            atom = JS_ATOM_Array;
        } else if (JS_IsFunction(ctx, obj)) {
            atom = JS_ATOM_Function;
        } else {
            p = JS_VALUE_GET_OBJ(obj);
            switch(p->class_id) {
            case JS_CLASS_STRING:
            case JS_CLASS_ARGUMENTS:
            case JS_CLASS_MAPPED_ARGUMENTS:
            case JS_CLASS_ERROR:
            case JS_CLASS_BOOLEAN:
            case JS_CLASS_NUMBER:
            case JS_CLASS_DATE:
            case JS_CLASS_REGEXP:
                atom = ctx->rt->class_array[p->class_id].class_name;
                break;
            default:
                atom = JS_ATOM_Object;
                break;
            }
        }
        tag = JS_GetProperty(ctx, obj, JS_ATOM_Symbol_toStringTag);
        JS_FreeValue(ctx, obj);
        if (JS_IsException(tag))
            return JS_EXCEPTION;
        if (!JS_IsString(tag)) {
            JS_FreeValue(ctx, tag);
            tag = JS_AtomToString(ctx, atom);
        }
    }
    return JS_ConcatString3(ctx, "[object ", tag, "]");
}

static JSValue js_object_toLocaleString(JSContext *ctx, JSValueConst this_val,
                                        int argc, JSValueConst *argv)
{
    return JS_Invoke(ctx, this_val, JS_ATOM_toString, 0, NULL);
}

static JSValue js_object_assign(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    // Object.assign(obj, source1)
    JSValue obj, s;
    int i;

    s = JS_UNDEFINED;
    obj = JS_ToObject(ctx, argv[0]);
    if (JS_IsException(obj))
        goto exception;
    for (i = 1; i < argc; i++) {
        if (!JS_IsNull(argv[i]) && !JS_IsUndefined(argv[i])) {
            s = JS_ToObject(ctx, argv[i]);
            if (JS_IsException(s))
                goto exception;
            if (JS_CopyDataProperties(ctx, obj, s, JS_UNDEFINED, TRUE))
                goto exception;
            JS_FreeValue(ctx, s);
        }
    }
    return obj;
exception:
    JS_FreeValue(ctx, obj);
    JS_FreeValue(ctx, s);
    return JS_EXCEPTION;
}

static JSValue js_object_seal(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv, int freeze_flag)
{
    JSValueConst obj = argv[0];
    JSObject *p;
    JSPropertyEnum *props;
    uint32_t len, i;
    int flags, desc_flags, res;

    if (!JS_IsObject(obj))
        return JS_DupValue(ctx, obj);

    res = JS_PreventExtensions(ctx, obj);
    if (res < 0)
        return JS_EXCEPTION;
    if (!res) {
        return JS_ThrowTypeError(ctx, "proxy preventExtensions handler returned false");
    }

    p = JS_VALUE_GET_OBJ(obj);
    flags = JS_GPN_STRING_MASK | JS_GPN_SYMBOL_MASK;
    if (JS_GetOwnPropertyNamesInternal(ctx, &props, &len, p, flags))
        return JS_EXCEPTION;

    for(i = 0; i < len; i++) {
        JSPropertyDescriptor desc;
        JSAtom prop = props[i].atom;

        desc_flags = JS_PROP_THROW | JS_PROP_HAS_CONFIGURABLE;
        if (freeze_flag) {
            res = JS_GetOwnPropertyInternal(ctx, &desc, p, prop);
            if (res < 0)
                goto exception;
            if (res) {
                if (desc.flags & JS_PROP_WRITABLE)
                    desc_flags |= JS_PROP_HAS_WRITABLE;
                js_free_desc(ctx, &desc);
            }
        }
        if (JS_DefineProperty(ctx, obj, prop, JS_UNDEFINED,
                              JS_UNDEFINED, JS_UNDEFINED, desc_flags) < 0)
            goto exception;
    }
    js_free_prop_enum(ctx, props, len);
    return JS_DupValue(ctx, obj);

 exception:
    js_free_prop_enum(ctx, props, len);
    return JS_EXCEPTION;
}

static JSValue js_object_isSealed(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv, int is_frozen)
{
    JSValueConst obj = argv[0];
    JSObject *p;
    JSPropertyEnum *props;
    uint32_t len, i;
    int flags, res;

    if (!JS_IsObject(obj))
        return JS_TRUE;

    p = JS_VALUE_GET_OBJ(obj);
    flags = JS_GPN_STRING_MASK | JS_GPN_SYMBOL_MASK;
    if (JS_GetOwnPropertyNamesInternal(ctx, &props, &len, p, flags))
        return JS_EXCEPTION;

    for(i = 0; i < len; i++) {
        JSPropertyDescriptor desc;
        JSAtom prop = props[i].atom;

        res = JS_GetOwnPropertyInternal(ctx, &desc, p, prop);
        if (res < 0)
            goto exception;
        if (res) {
            js_free_desc(ctx, &desc);
            if ((desc.flags & JS_PROP_CONFIGURABLE)
            ||  (is_frozen && (desc.flags & JS_PROP_WRITABLE))) {
                res = FALSE;
                goto done;
            }
        }
    }
    res = JS_IsExtensible(ctx, obj);
    if (res < 0)
        return JS_EXCEPTION;
    res ^= 1;
done:
    js_free_prop_enum(ctx, props, len);
    return JS_NewBool(ctx, res);

exception:
    js_free_prop_enum(ctx, props, len);
    return JS_EXCEPTION;
}

static JSValue js_object_fromEntries(JSContext *ctx, JSValueConst this_val,
                                     int argc, JSValueConst *argv)
{
    JSValue obj, iter, next_method = JS_UNDEFINED;
    JSValueConst iterable;
    BOOL done;

    /*  RequireObjectCoercible() not necessary because it is tested in
        JS_GetIterator() by JS_GetProperty() */
    iterable = argv[0];

    obj = JS_NewObject(ctx);
    if (JS_IsException(obj))
        return obj;

    iter = JS_GetIterator(ctx, iterable, FALSE);
    if (JS_IsException(iter))
        goto fail;
    next_method = JS_GetProperty(ctx, iter, JS_ATOM_next);
    if (JS_IsException(next_method))
        goto fail;

    for(;;) {
        JSValue key, value, item;
        item = JS_IteratorNext(ctx, iter, next_method, 0, NULL, &done);
        if (JS_IsException(item))
            goto fail;
        if (done) {
            JS_FreeValue(ctx, item);
            break;
        }

        key = JS_UNDEFINED;
        value = JS_UNDEFINED;
        if (!JS_IsObject(item)) {
            JS_ThrowTypeErrorNotAnObject(ctx);
            goto fail1;
        }
        key = JS_GetPropertyUint32(ctx, item, 0);
        if (JS_IsException(key))
            goto fail1;
        value = JS_GetPropertyUint32(ctx, item, 1);
        if (JS_IsException(value)) {
            JS_FreeValue(ctx, key);
            goto fail1;
        }
        if (JS_DefinePropertyValueValue(ctx, obj, key, value,
                                        JS_PROP_C_W_E | JS_PROP_THROW) < 0) {
        fail1:
            JS_FreeValue(ctx, item);
            goto fail;
        }
        JS_FreeValue(ctx, item);
    }
    JS_FreeValue(ctx, next_method);
    JS_FreeValue(ctx, iter);
    return obj;
 fail:
    if (JS_IsObject(iter)) {
        /* close the iterator object, preserving pending exception */
        JS_IteratorClose(ctx, iter, TRUE);
    }
    JS_FreeValue(ctx, next_method);
    JS_FreeValue(ctx, iter);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

#if 0
/* Note: corresponds to ECMA spec: CreateDataPropertyOrThrow() */
static JSValue js_object___setOwnProperty(JSContext *ctx, JSValueConst this_val,
                                          int argc, JSValueConst *argv)
{
    int ret;
    ret = JS_DefinePropertyValueValue(ctx, argv[0], JS_DupValue(ctx, argv[1]),
                                      JS_DupValue(ctx, argv[2]),
                                      JS_PROP_C_W_E | JS_PROP_THROW);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_object___toObject(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    return JS_ToObject(ctx, argv[0]);
}

static JSValue js_object___toPrimitive(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    int hint = HINT_NONE;

    if (JS_VALUE_GET_TAG(argv[1]) == JS_TAG_INT)
        hint = JS_VALUE_GET_INT(argv[1]);

    return JS_ToPrimitive(ctx, argv[0], hint);
}
#endif

/* return an empty string if not an object */
static JSValue js_object___getClass(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    JSAtom atom;
    JSObject *p;
    uint32_t tag;
    int class_id;

    tag = JS_VALUE_GET_NORM_TAG(argv[0]);
    if (tag == JS_TAG_OBJECT) {
        p = JS_VALUE_GET_OBJ(argv[0]);
        class_id = p->class_id;
        if (class_id == JS_CLASS_PROXY && JS_IsFunction(ctx, argv[0]))
            class_id = JS_CLASS_BYTECODE_FUNCTION;
        atom = ctx->rt->class_array[class_id].class_name;
    } else {
        atom = JS_ATOM_empty_string;
    }
    return JS_AtomToString(ctx, atom);
}

static JSValue js_object_is(JSContext *ctx, JSValueConst this_val,
                            int argc, JSValueConst *argv)
{
    return JS_NewBool(ctx, js_same_value(ctx, argv[0], argv[1]));
}

#if 0
static JSValue js_object___getObjectData(JSContext *ctx, JSValueConst this_val,
                                         int argc, JSValueConst *argv)
{
    return JS_GetObjectData(ctx, argv[0]);
}

static JSValue js_object___setObjectData(JSContext *ctx, JSValueConst this_val,
                                         int argc, JSValueConst *argv)
{
    if (JS_SetObjectData(ctx, argv[0], JS_DupValue(ctx, argv[1])))
        return JS_EXCEPTION;
    return JS_DupValue(ctx, argv[1]);
}

static JSValue js_object___toPropertyKey(JSContext *ctx, JSValueConst this_val,
                                         int argc, JSValueConst *argv)
{
    return JS_ToPropertyKey(ctx, argv[0]);
}

static JSValue js_object___isObject(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    return JS_NewBool(ctx, JS_IsObject(argv[0]));
}

static JSValue js_object___isSameValueZero(JSContext *ctx, JSValueConst this_val,
                                           int argc, JSValueConst *argv)
{
    return JS_NewBool(ctx, js_same_value_zero(ctx, argv[0], argv[1]));
}

static JSValue js_object___isConstructor(JSContext *ctx, JSValueConst this_val,
                                         int argc, JSValueConst *argv)
{
    return JS_NewBool(ctx, JS_IsConstructor(ctx, argv[0]));
}
#endif

static JSValue JS_SpeciesConstructor(JSContext *ctx, JSValueConst obj,
                                     JSValueConst defaultConstructor)
{
    JSValue ctor, species;

    if (!JS_IsObject(obj))
        return JS_ThrowTypeErrorNotAnObject(ctx);
    ctor = JS_GetProperty(ctx, obj, JS_ATOM_constructor);
    if (JS_IsException(ctor))
        return ctor;
    if (JS_IsUndefined(ctor))
        return JS_DupValue(ctx, defaultConstructor);
    if (!JS_IsObject(ctor)) {
        JS_FreeValue(ctx, ctor);
        return JS_ThrowTypeErrorNotAnObject(ctx);
    }
    species = JS_GetProperty(ctx, ctor, JS_ATOM_Symbol_species);
    JS_FreeValue(ctx, ctor);
    if (JS_IsException(species))
        return species;
    if (JS_IsUndefined(species) || JS_IsNull(species))
        return JS_DupValue(ctx, defaultConstructor);
    if (!JS_IsConstructor(ctx, species)) {
        JS_FreeValue(ctx, species);
        return JS_ThrowTypeError(ctx, "not a constructor");
    }
    return species;
}

#if 0
static JSValue js_object___speciesConstructor(JSContext *ctx, JSValueConst this_val,
                                              int argc, JSValueConst *argv)
{
    return JS_SpeciesConstructor(ctx, argv[0], argv[1]);
}
#endif

static JSValue js_object_get___proto__(JSContext *ctx, JSValueConst this_val)
{
    JSValue val, ret;

    val = JS_ToObject(ctx, this_val);
    if (JS_IsException(val))
        return val;
    ret = JS_GetPrototype(ctx, val);
    JS_FreeValue(ctx, val);
    return ret;
}

static JSValue js_object_set___proto__(JSContext *ctx, JSValueConst this_val,
                                       JSValueConst proto)
{
    if (JS_IsUndefined(this_val) || JS_IsNull(this_val))
        return JS_ThrowTypeErrorNotAnObject(ctx);
    if (!JS_IsObject(proto) && !JS_IsNull(proto))
        return JS_UNDEFINED;
    if (JS_SetPrototypeInternal(ctx, this_val, proto, TRUE) < 0)
        return JS_EXCEPTION;
    else
        return JS_UNDEFINED;
}

static JSValue js_object_isPrototypeOf(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    JSValue obj, v1;
    JSValueConst v;
    int res;

    v = argv[0];
    if (!JS_IsObject(v))
        return JS_FALSE;
    obj = JS_ToObject(ctx, this_val);
    if (JS_IsException(obj))
        return JS_EXCEPTION;
    v1 = JS_DupValue(ctx, v);
    for(;;) {
        v1 = JS_GetPrototypeFree(ctx, v1);
        if (JS_IsException(v1))
            goto exception;
        if (JS_IsNull(v1)) {
            res = FALSE;
            break;
        }
        if (JS_VALUE_GET_OBJ(obj) == JS_VALUE_GET_OBJ(v1)) {
            res = TRUE;
            break;
        }
        /* avoid infinite loop (possible with proxies) */
        if (js_poll_interrupts(ctx))
            goto exception;
    }
    JS_FreeValue(ctx, v1);
    JS_FreeValue(ctx, obj);
    return JS_NewBool(ctx, res);

exception:
    JS_FreeValue(ctx, v1);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_object_propertyIsEnumerable(JSContext *ctx, JSValueConst this_val,
                                              int argc, JSValueConst *argv)
{
    JSValue obj, res = JS_EXCEPTION;
    JSAtom prop = JS_ATOM_NULL;
    JSPropertyDescriptor desc;
    int has_prop;

    obj = JS_ToObject(ctx, this_val);
    if (JS_IsException(obj))
        goto exception;
    prop = JS_ValueToAtom(ctx, argv[0]);
    if (js_unlikely(prop == JS_ATOM_NULL))
        goto exception;

    has_prop = JS_GetOwnPropertyInternal(ctx, &desc, JS_VALUE_GET_OBJ(obj), prop);
    if (has_prop < 0)
        goto exception;
    if (has_prop) {
        res = JS_NewBool(ctx, (desc.flags & JS_PROP_ENUMERABLE) != 0);
        js_free_desc(ctx, &desc);
    } else {
        res = JS_FALSE;
    }

exception:
    JS_FreeAtom(ctx, prop);
    JS_FreeValue(ctx, obj);
    return res;
}

static JSValue js_object___lookupGetter__(JSContext *ctx, JSValueConst this_val,
                                          int argc, JSValueConst *argv, int setter)
{
    JSValue obj, res = JS_EXCEPTION;
    JSAtom prop = JS_ATOM_NULL;
    JSPropertyDescriptor desc;
    int has_prop;

    obj = JS_ToObject(ctx, this_val);
    if (JS_IsException(obj))
        goto exception;
    prop = JS_ValueToAtom(ctx, argv[0]);
    if (js_unlikely(prop == JS_ATOM_NULL))
        goto exception;

    for (;;) {
        has_prop = JS_GetOwnPropertyInternal(ctx, &desc, JS_VALUE_GET_OBJ(obj), prop);
        if (has_prop < 0)
            goto exception;
        if (has_prop) {
            if (desc.flags & JS_PROP_GETSET)
                res = JS_DupValue(ctx, setter ? desc.setter : desc.getter);
            else
                res = JS_UNDEFINED;
            js_free_desc(ctx, &desc);
            break;
        }
        obj = JS_GetPrototypeFree(ctx, obj);
        if (JS_IsException(obj))
            goto exception;
        if (JS_IsNull(obj)) {
            res = JS_UNDEFINED;
            break;
        }
        /* avoid infinite loop (possible with proxies) */
        if (js_poll_interrupts(ctx))
            goto exception;
    }

exception:
    JS_FreeAtom(ctx, prop);
    JS_FreeValue(ctx, obj);
    return res;
}

static const JSCFunctionListEntry js_object_funcs[] = {
    JS_CFUNC_DEF("create", 2, js_object_create ),
    JS_CFUNC_MAGIC_DEF("getPrototypeOf", 1, js_object_getPrototypeOf, 0 ),
    JS_CFUNC_DEF("setPrototypeOf", 2, js_object_setPrototypeOf ),
    JS_CFUNC_MAGIC_DEF("defineProperty", 3, js_object_defineProperty, 0 ),
    JS_CFUNC_DEF("defineProperties", 2, js_object_defineProperties ),
    JS_CFUNC_DEF("getOwnPropertyNames", 1, js_object_getOwnPropertyNames ),
    JS_CFUNC_DEF("getOwnPropertySymbols", 1, js_object_getOwnPropertySymbols ),
    JS_CFUNC_MAGIC_DEF("keys", 1, js_object_keys, JS_ITERATOR_KIND_KEY ),
    JS_CFUNC_MAGIC_DEF("values", 1, js_object_keys, JS_ITERATOR_KIND_VALUE ),
    JS_CFUNC_MAGIC_DEF("entries", 1, js_object_keys, JS_ITERATOR_KIND_KEY_AND_VALUE ),
    JS_CFUNC_MAGIC_DEF("isExtensible", 1, js_object_isExtensible, 0 ),
    JS_CFUNC_MAGIC_DEF("preventExtensions", 1, js_object_preventExtensions, 0 ),
    JS_CFUNC_MAGIC_DEF("getOwnPropertyDescriptor", 2, js_object_getOwnPropertyDescriptor, 0 ),
    JS_CFUNC_DEF("getOwnPropertyDescriptors", 1, js_object_getOwnPropertyDescriptors ),
    JS_CFUNC_DEF("is", 2, js_object_is ),
    JS_CFUNC_DEF("assign", 2, js_object_assign ),
    JS_CFUNC_MAGIC_DEF("seal", 1, js_object_seal, 0 ),
    JS_CFUNC_MAGIC_DEF("freeze", 1, js_object_seal, 1 ),
    JS_CFUNC_MAGIC_DEF("isSealed", 1, js_object_isSealed, 0 ),
    JS_CFUNC_MAGIC_DEF("isFrozen", 1, js_object_isSealed, 1 ),
    JS_CFUNC_DEF("__getClass", 1, js_object___getClass ),
    //JS_CFUNC_DEF("__isObject", 1, js_object___isObject ),
    //JS_CFUNC_DEF("__isConstructor", 1, js_object___isConstructor ),
    //JS_CFUNC_DEF("__toObject", 1, js_object___toObject ),
    //JS_CFUNC_DEF("__setOwnProperty", 3, js_object___setOwnProperty ),
    //JS_CFUNC_DEF("__toPrimitive", 2, js_object___toPrimitive ),
    //JS_CFUNC_DEF("__toPropertyKey", 1, js_object___toPropertyKey ),
    //JS_CFUNC_DEF("__speciesConstructor", 2, js_object___speciesConstructor ),
    //JS_CFUNC_DEF("__isSameValueZero", 2, js_object___isSameValueZero ),
    //JS_CFUNC_DEF("__getObjectData", 1, js_object___getObjectData ),
    //JS_CFUNC_DEF("__setObjectData", 2, js_object___setObjectData ),
    JS_CFUNC_DEF("fromEntries", 1, js_object_fromEntries ),
    JS_CFUNC_DEF("hasOwn", 2, js_object_hasOwn ),
};

static const JSCFunctionListEntry js_object_proto_funcs[] = {
    JS_CFUNC_DEF("toString", 0, js_object_toString ),
    JS_CFUNC_DEF("toLocaleString", 0, js_object_toLocaleString ),
    JS_CFUNC_DEF("valueOf", 0, js_object_valueOf ),
    JS_CFUNC_DEF("hasOwnProperty", 1, js_object_hasOwnProperty ),
    JS_CFUNC_DEF("isPrototypeOf", 1, js_object_isPrototypeOf ),
    JS_CFUNC_DEF("propertyIsEnumerable", 1, js_object_propertyIsEnumerable ),
    JS_CGETSET_DEF("__proto__", js_object_get___proto__, js_object_set___proto__ ),
    JS_CFUNC_MAGIC_DEF("__defineGetter__", 2, js_object___defineGetter__, 0 ),
    JS_CFUNC_MAGIC_DEF("__defineSetter__", 2, js_object___defineGetter__, 1 ),
    JS_CFUNC_MAGIC_DEF("__lookupGetter__", 1, js_object___lookupGetter__, 0 ),
    JS_CFUNC_MAGIC_DEF("__lookupSetter__", 1, js_object___lookupGetter__, 1 ),
};

/* Function class */

static JSValue js_function_proto(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    return JS_UNDEFINED;
}

/* XXX: add a specific eval mode so that Function("}), ({") is rejected */
static JSValue js_function_constructor(JSContext *ctx, JSValueConst new_target,
                                       int argc, JSValueConst *argv, int magic)
{
    auto func_kind = (JSFunctionKindEnum) magic;
    int i, n, ret;
    JSValue s, proto, obj = JS_UNDEFINED;
    StringBuffer b_s, *b = &b_s;

    string_buffer_init(ctx, b, 0);
    string_buffer_putc8(b, '(');

    if (func_kind == JS_FUNC_ASYNC || func_kind == JS_FUNC_ASYNC_GENERATOR) {
        string_buffer_puts8(b, "async ");
    }
    string_buffer_puts8(b, "function");

    if (func_kind == JS_FUNC_GENERATOR || func_kind == JS_FUNC_ASYNC_GENERATOR) {
        string_buffer_putc8(b, '*');
    }
    string_buffer_puts8(b, " anonymous(");

    n = argc - 1;
    for(i = 0; i < n; i++) {
        if (i != 0) {
            string_buffer_putc8(b, ',');
        }
        if (string_buffer_concat_value(b, argv[i]))
            goto fail;
    }
    string_buffer_puts8(b, "\n) {\n");
    if (n >= 0) {
        if (string_buffer_concat_value(b, argv[n]))
            goto fail;
    }
    string_buffer_puts8(b, "\n})");
    s = string_buffer_end(b);
    if (JS_IsException(s))
        goto fail1;

    obj = JS_EvalObject(ctx, ctx->global_obj, s, JS_EVAL_TYPE_INDIRECT, -1);
    JS_FreeValue(ctx, s);
    if (JS_IsException(obj))
        goto fail1;
    if (!JS_IsUndefined(new_target)) {
        /* set the prototype */
        proto = JS_GetProperty(ctx, new_target, JS_ATOM_prototype);
        if (JS_IsException(proto))
            goto fail1;
        if (!JS_IsObject(proto)) {
            JSContext *realm;
            JS_FreeValue(ctx, proto);
            realm = JS_GetFunctionRealm(ctx, new_target);
            if (!realm)
                goto fail1;
            proto = JS_DupValue(ctx, realm->class_proto[func_kind_to_class_id (func_kind)]);
        }
        ret = JS_SetPrototypeInternal(ctx, obj, proto, TRUE);
        JS_FreeValue(ctx, proto);
        if (ret < 0)
            goto fail1;
    }
    return obj;

 fail:
    string_buffer_free(b);
 fail1:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

[[nodiscard]] static int js_get_length32(JSContext *ctx, uint32_t *pres,
                                       JSValueConst obj)
{
    JSValue len_val;
    len_val = JS_GetProperty(ctx, obj, JS_ATOM_length);
    if (JS_IsException(len_val)) {
        *pres = 0;
        return -1;
    }
    return JS_ToUint32Free(ctx, pres, len_val);
}

[[nodiscard]] static int js_get_length64(JSContext *ctx, int64_t *pres,
                                       JSValueConst obj)
{
    JSValue len_val;
    len_val = JS_GetProperty(ctx, obj, JS_ATOM_length);
    if (JS_IsException(len_val)) {
        *pres = 0;
        return -1;
    }
    return JS_ToLengthFree(ctx, pres, len_val);
}

static void free_arg_list(JSContext *ctx, JSValue *tab, uint32_t len)
{
    uint32_t i;
    for(i = 0; i < len; i++) {
        JS_FreeValue(ctx, tab[i]);
    }
    js_free(ctx, tab);
}

/* XXX: should use ValueArray */
static JSValue *build_arg_list(JSContext *ctx, uint32_t *plen,
                               JSValueConst array_arg)
{
    uint32_t len, i;
    JSValue *tab, ret;
    JSObject *p;

    if (JS_VALUE_GET_TAG(array_arg) != JS_TAG_OBJECT) {
        JS_ThrowTypeError(ctx, "not a object");
        return NULL;
    }
    if (js_get_length32(ctx, &len, array_arg))
        return NULL;
    if (len > JS_MAX_LOCAL_VARS) {
        JS_ThrowInternalError(ctx, "too many arguments");
        return NULL;
    }
    /* avoid allocating 0 bytes */
    tab = (JSValue*) js_mallocz(ctx, sizeof(tab[0]) * max_uint32(1, len));
    if (!tab)
        return NULL;
    p = JS_VALUE_GET_OBJ(array_arg);
    if ((p->class_id == JS_CLASS_ARRAY || p->class_id == JS_CLASS_ARGUMENTS) &&
        p->fast_array &&
        len == p->u.array.count) {
        for(i = 0; i < len; i++) {
            tab[i] = JS_DupValue(ctx, p->u.array.u.values[i]);
        }
    } else {
        for(i = 0; i < len; i++) {
            ret = JS_GetPropertyUint32(ctx, array_arg, i);
            if (JS_IsException(ret)) {
                free_arg_list(ctx, tab, i);
                return NULL;
            }
            tab[i] = ret;
        }
    }
    *plen = len;
    return tab;
}

/* magic value: 0 = normal apply, 1 = apply for constructor, 2 =
   Reflect.apply */
static JSValue js_function_apply(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv, int magic)
{
    JSValueConst this_arg, array_arg;
    uint32_t len;
    JSValue *tab, ret;

    if (check_function(ctx, this_val))
        return JS_EXCEPTION;
    this_arg = argv[0];
    array_arg = argv[1];
    if ((JS_VALUE_GET_TAG(array_arg) == JS_TAG_UNDEFINED ||
         JS_VALUE_GET_TAG(array_arg) == JS_TAG_NULL) && magic != 2) {
        return JS_Call(ctx, this_val, this_arg, 0, NULL);
    }
    tab = build_arg_list(ctx, &len, array_arg);
    if (!tab)
        return JS_EXCEPTION;
    if (magic & 1) {
        ret = JS_CallConstructor2(ctx, this_val, this_arg, len, (JSValueConst *)tab);
    } else {
        ret = JS_Call(ctx, this_val, this_arg, len, (JSValueConst *)tab);
    }
    free_arg_list(ctx, tab, len);
    return ret;
}

static JSValue js_function_call(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    if (argc <= 0) {
        return JS_Call(ctx, this_val, JS_UNDEFINED, 0, NULL);
    } else {
        return JS_Call(ctx, this_val, argv[0], argc - 1, argv + 1);
    }
}

static JSValue js_function_bind(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSBoundFunction *bf;
    JSValue func_obj, name1, len_val;
    JSObject *p;
    int arg_count, i, ret;

    if (check_function(ctx, this_val))
        return JS_EXCEPTION;

    func_obj = JS_NewObjectProtoClass(ctx, ctx->function_proto,
                                 JS_CLASS_BOUND_FUNCTION);
    if (JS_IsException(func_obj))
        return JS_EXCEPTION;
    p = JS_VALUE_GET_OBJ(func_obj);
    p->is_constructor = JS_IsConstructor(ctx, this_val);
    arg_count = max_int(0, argc - 1);
    bf = (JSBoundFunction*) js_malloc(ctx, sizeof(*bf) + arg_count * sizeof(JSValue));
    if (!bf)
        goto exception;
    bf->func_obj = JS_DupValue(ctx, this_val);
    bf->this_val = JS_DupValue(ctx, argv[0]);
    bf->argc = arg_count;
    for(i = 0; i < arg_count; i++) {
        bf->argv[i] = JS_DupValue(ctx, argv[i + 1]);
    }
    p->u.bound_function = bf;

    /* XXX: the spec could be simpler by only using GetOwnProperty */
    ret = JS_GetOwnProperty(ctx, NULL, this_val, JS_ATOM_length);
    if (ret < 0)
        goto exception;
    if (!ret) {
        len_val = JS_NewInt32(ctx, 0);
    } else {
        len_val = JS_GetProperty(ctx, this_val, JS_ATOM_length);
        if (JS_IsException(len_val))
            goto exception;
        if (JS_VALUE_GET_TAG(len_val) == JS_TAG_INT) {
            /* most common case */
            int len1 = JS_VALUE_GET_INT(len_val);
            if (len1 <= arg_count)
                len1 = 0;
            else
                len1 -= arg_count;
            len_val = JS_NewInt32(ctx, len1);
        } else if (JS_VALUE_GET_NORM_TAG(len_val) == JS_TAG_FLOAT64) {
            double d = JS_VALUE_GET_FLOAT64(len_val);
            if (isnan(d)) {
                d = 0.0;
            } else {
                d = trunc(d);
                if (d <= (double)arg_count)
                    d = 0.0;
                else
                    d -= (double)arg_count; /* also converts -0 to +0 */
            }
            len_val = JS_NewFloat64(ctx, d);
        } else {
            JS_FreeValue(ctx, len_val);
            len_val = JS_NewInt32(ctx, 0);
        }
    }
    JS_DefinePropertyValue(ctx, func_obj, JS_ATOM_length,
                           len_val, JS_PROP_CONFIGURABLE);

    name1 = JS_GetProperty(ctx, this_val, JS_ATOM_name);
    if (JS_IsException(name1))
        goto exception;
    if (!JS_IsString(name1)) {
        JS_FreeValue(ctx, name1);
        name1 = JS_AtomToString(ctx, JS_ATOM_empty_string);
    }
    name1 = JS_ConcatString3(ctx, "bound ", name1, "");
    if (JS_IsException(name1))
        goto exception;
    JS_DefinePropertyValue(ctx, func_obj, JS_ATOM_name, name1,
                           JS_PROP_CONFIGURABLE);
    return func_obj;
 exception:
    JS_FreeValue(ctx, func_obj);
    return JS_EXCEPTION;
}

static JSValue js_function_toString(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    JSObject *p;
    JSFunctionKindEnum func_kind = JS_FUNC_NORMAL;

    if (check_function(ctx, this_val))
        return JS_EXCEPTION;

    p = JS_VALUE_GET_OBJ(this_val);
    if (js_class_has_bytecode(p->class_id)) {
        JSFunctionBytecode *b = p->u.func.function_bytecode;
        if (b->has_debug && b->debug.source) {
            return JS_NewStringLen(ctx, b->debug.source, b->debug.source_len);
        }
        func_kind = (JSFunctionKindEnum) b->func_kind;
    }
    {
        JSValue name;
        const char *pref, *suff;

        switch(func_kind) {
        default:
        case JS_FUNC_NORMAL:
            pref = "function ";
            break;
        case JS_FUNC_GENERATOR:
            pref = "function *";
            break;
        case JS_FUNC_ASYNC:
            pref = "async function ";
            break;
        case JS_FUNC_ASYNC_GENERATOR:
            pref = "async function *";
            break;
        }
        suff = "() {\n    [native code]\n}";
        name = JS_GetProperty(ctx, this_val, JS_ATOM_name);
        if (JS_IsUndefined(name))
            name = JS_AtomToString(ctx, JS_ATOM_empty_string);
        return JS_ConcatString3(ctx, pref, name, suff);
    }
}

static JSValue js_function_hasInstance(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    int ret;
    ret = JS_OrdinaryIsInstanceOf(ctx, argv[0], this_val);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static const JSCFunctionListEntry js_function_proto_funcs[] = {
    JS_CFUNC_DEF("call", 1, js_function_call ),
    JS_CFUNC_MAGIC_DEF("apply", 2, js_function_apply, 0 ),
    JS_CFUNC_DEF("bind", 1, js_function_bind ),
    JS_CFUNC_DEF("toString", 0, js_function_toString ),
    JS_CFUNC_DEF("[Symbol.hasInstance]", 1, js_function_hasInstance ),
    JS_CGETSET_DEF("fileName", js_function_proto_fileName, NULL ),
    JS_CGETSET_DEF("lineNumber", js_function_proto_lineNumber, NULL ),
};

/* Error class */

static JSValue iterator_to_array(JSContext *ctx, JSValueConst items)
{
    JSValue iter, next_method = JS_UNDEFINED;
    JSValue v, r = JS_UNDEFINED;
    int64_t k;
    BOOL done;

    iter = JS_GetIterator(ctx, items, FALSE);
    if (JS_IsException(iter))
        goto exception;
    next_method = JS_GetProperty(ctx, iter, JS_ATOM_next);
    if (JS_IsException(next_method))
        goto exception;
    r = JS_NewArray(ctx);
    if (JS_IsException(r))
        goto exception;
    for (k = 0;; k++) {
        v = JS_IteratorNext(ctx, iter, next_method, 0, NULL, &done);
        if (JS_IsException(v))
            goto exception_close;
        if (done)
            break;
        if (JS_DefinePropertyValueInt64(ctx, r, k, v,
                                        JS_PROP_C_W_E | JS_PROP_THROW) < 0)
            goto exception_close;
    }
 done:
    JS_FreeValue(ctx, next_method);
    JS_FreeValue(ctx, iter);
    return r;
 exception_close:
    JS_IteratorClose(ctx, iter, TRUE);
 exception:
    JS_FreeValue(ctx, r);
    r = JS_EXCEPTION;
    goto done;
}

static JSValue js_error_constructor(JSContext *ctx, JSValueConst new_target,
                                    int argc, JSValueConst *argv, int magic)
{
    JSValue obj, msg, proto;
    JSValueConst message;

    if (JS_IsUndefined(new_target))
        new_target = JS_GetActiveFunction(ctx);
    proto = JS_GetProperty(ctx, new_target, JS_ATOM_prototype);
    if (JS_IsException(proto))
        return proto;
    if (!JS_IsObject(proto)) {
        JSContext *realm;
        JSValueConst proto1;

        JS_FreeValue(ctx, proto);
        realm = JS_GetFunctionRealm(ctx, new_target);
        if (!realm)
            return JS_EXCEPTION;
        if (magic < 0) {
            proto1 = realm->class_proto[JS_CLASS_ERROR];
        } else {
            proto1 = realm->native_error_proto[magic];
        }
        proto = JS_DupValue(ctx, proto1);
    }
    obj = JS_NewObjectProtoClass(ctx, proto, JS_CLASS_ERROR);
    JS_FreeValue(ctx, proto);
    if (JS_IsException(obj))
        return obj;
    if (magic == JS_AGGREGATE_ERROR) {
        message = argv[1];
    } else {
        message = argv[0];
    }

    if (!JS_IsUndefined(message)) {
        msg = JS_ToString(ctx, message);
        if (js_unlikely(JS_IsException(msg)))
            goto exception;
        JS_DefinePropertyValue(ctx, obj, JS_ATOM_message, msg,
                               JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
    }

    if (magic == JS_AGGREGATE_ERROR) {
        JSValue error_list = iterator_to_array(ctx, argv[0]);
        if (JS_IsException(error_list))
            goto exception;
        JS_DefinePropertyValue(ctx, obj, JS_ATOM_errors, error_list,
                               JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
    }

    /* skip the Error() function in the backtrace */
    build_backtrace(ctx, obj, NULL, 0, JS_BACKTRACE_FLAG_SKIP_FIRST_LEVEL);
    return obj;
 exception:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_error_toString(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    JSValue name, msg;

    if (!JS_IsObject(this_val))
        return JS_ThrowTypeErrorNotAnObject(ctx);
    name = JS_GetProperty(ctx, this_val, JS_ATOM_name);
    if (JS_IsUndefined(name))
        name = JS_AtomToString(ctx, JS_ATOM_Error);
    else
        name = JS_ToStringFree(ctx, name);
    if (JS_IsException(name))
        return JS_EXCEPTION;

    msg = JS_GetProperty(ctx, this_val, JS_ATOM_message);
    if (JS_IsUndefined(msg))
        msg = JS_AtomToString(ctx, JS_ATOM_empty_string);
    else
        msg = JS_ToStringFree(ctx, msg);
    if (JS_IsException(msg)) {
        JS_FreeValue(ctx, name);
        return JS_EXCEPTION;
    }
    if (!JS_IsEmptyString(name) && !JS_IsEmptyString(msg))
        name = JS_ConcatString3(ctx, "", name, ": ");
    return JS_ConcatString(ctx, name, msg);
}

static const JSCFunctionListEntry js_error_proto_funcs[] = {
    JS_CFUNC_DEF("toString", 0, js_error_toString ),
    JS_PROP_STRING_DEF("name", "Error", JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE ),
    JS_PROP_STRING_DEF("message", "", JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE ),
};

/* AggregateError */

/* used by C code. */
static JSValue js_aggregate_error_constructor(JSContext *ctx,
                                              JSValueConst errors)
{
    JSValue obj;

    obj = JS_NewObjectProtoClass(ctx,
                                 ctx->native_error_proto[JS_AGGREGATE_ERROR],
                                 JS_CLASS_ERROR);
    if (JS_IsException(obj))
        return obj;
    JS_DefinePropertyValue(ctx, obj, JS_ATOM_errors, JS_DupValue(ctx, errors),
                           JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
    return obj;
}

/* Array */

static int JS_CopySubArray(JSContext *ctx,
                           JSValueConst obj, int64_t to_pos,
                           int64_t from_pos, int64_t count, int dir)
{
    JSObject *p;
    int64_t i, from, to, len;
    JSValue val;
    int fromPresent;

    p = NULL;
    if (JS_VALUE_GET_TAG(obj) == JS_TAG_OBJECT) {
        p = JS_VALUE_GET_OBJ(obj);
        if (p->class_id != JS_CLASS_ARRAY || !p->fast_array) {
            p = NULL;
        }
    }

    for (i = 0; i < count; ) {
        if (dir < 0) {
            from = from_pos + count - i - 1;
            to = to_pos + count - i - 1;
        } else {
            from = from_pos + i;
            to = to_pos + i;
        }
        if (p && p->fast_array &&
            from >= 0 && from < (len = p->u.array.count)  &&
            to >= 0 && to < len) {
            int64_t l, j;
            /* Fast path for fast arrays. Since we don't look at the
               prototype chain, we can optimize only the cases where
               all the elements are present in the array. */
            l = count - i;
            if (dir < 0) {
                l = min_int64(l, from + 1);
                l = min_int64(l, to + 1);
                for(j = 0; j < l; j++) {
                    set_value(ctx, &p->u.array.u.values[to - j],
                              JS_DupValue(ctx, p->u.array.u.values[from - j]));
                }
            } else {
                l = min_int64(l, len - from);
                l = min_int64(l, len - to);
                for(j = 0; j < l; j++) {
                    set_value(ctx, &p->u.array.u.values[to + j],
                              JS_DupValue(ctx, p->u.array.u.values[from + j]));
                }
            }
            i += l;
        } else {
            fromPresent = JS_TryGetPropertyInt64(ctx, obj, from, &val);
            if (fromPresent < 0)
                goto exception;

            if (fromPresent) {
                if (JS_SetPropertyInt64(ctx, obj, to, val) < 0)
                    goto exception;
            } else {
                if (JS_DeletePropertyInt64(ctx, obj, to, JS_PROP_THROW) < 0)
                    goto exception;
            }
            i++;
        }
    }
    return 0;

 exception:
    return -1;
}

static JSValue js_array_constructor(JSContext *ctx, JSValueConst new_target,
                                    int argc, JSValueConst *argv)
{
    JSValue obj;
    int i;

    obj = js_create_from_ctor(ctx, new_target, JS_CLASS_ARRAY);
    if (JS_IsException(obj))
        return obj;
    if (argc == 1 && JS_IsNumber(argv[0])) {
        uint32_t len;
        if (JS_ToArrayLengthFree(ctx, &len, JS_DupValue(ctx, argv[0]), TRUE))
            goto fail;
        if (JS_SetProperty(ctx, obj, JS_ATOM_length, JS_NewUint32(ctx, len)) < 0)
            goto fail;
    } else {
        for(i = 0; i < argc; i++) {
            if (JS_SetPropertyUint32(ctx, obj, i, JS_DupValue(ctx, argv[i])) < 0)
                goto fail;
        }
    }
    return obj;
fail:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_array_from(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv)
{
    // from(items, mapfn = void 0, this_arg = void 0)
    JSValueConst items = argv[0], mapfn, this_arg;
    JSValueConst args[2];
    JSValue stack[2];
    JSValue iter, r, v, v2, arrayLike;
    int64_t k, len;
    int done, mapping;

    mapping = FALSE;
    mapfn = JS_UNDEFINED;
    this_arg = JS_UNDEFINED;
    r = JS_UNDEFINED;
    arrayLike = JS_UNDEFINED;
    stack[0] = JS_UNDEFINED;
    stack[1] = JS_UNDEFINED;

    if (argc > 1) {
        mapfn = argv[1];
        if (!JS_IsUndefined(mapfn)) {
            if (check_function(ctx, mapfn))
                goto exception;
            mapping = 1;
            if (argc > 2)
                this_arg = argv[2];
        }
    }
    iter = JS_GetProperty(ctx, items, JS_ATOM_Symbol_iterator);
    if (JS_IsException(iter))
        goto exception;
    if (!JS_IsUndefined(iter)) {
        JS_FreeValue(ctx, iter);
        if (JS_IsConstructor(ctx, this_val))
            r = JS_CallConstructor(ctx, this_val, 0, NULL);
        else
            r = JS_NewArray(ctx);
        if (JS_IsException(r))
            goto exception;
        stack[0] = JS_DupValue(ctx, items);
        if (js_for_of_start(ctx, &stack[1], FALSE))
            goto exception;
        for (k = 0;; k++) {
            v = JS_IteratorNext(ctx, stack[0], stack[1], 0, NULL, &done);
            if (JS_IsException(v))
                goto exception_close;
            if (done)
                break;
            if (mapping) {
                args[0] = v;
                args[1] = JS_NewInt32(ctx, k);
                v2 = JS_Call(ctx, mapfn, this_arg, 2, args);
                JS_FreeValue(ctx, v);
                v = v2;
                if (JS_IsException(v))
                    goto exception_close;
            }
            if (JS_DefinePropertyValueInt64(ctx, r, k, v,
                                            JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                goto exception_close;
        }
    } else {
        arrayLike = JS_ToObject(ctx, items);
        if (JS_IsException(arrayLike))
            goto exception;
        if (js_get_length64(ctx, &len, arrayLike) < 0)
            goto exception;
        v = JS_NewInt64(ctx, len);
        args[0] = v;
        if (JS_IsConstructor(ctx, this_val)) {
            r = JS_CallConstructor(ctx, this_val, 1, args);
        } else {
            r = js_array_constructor(ctx, JS_UNDEFINED, 1, args);
        }
        JS_FreeValue(ctx, v);
        if (JS_IsException(r))
            goto exception;
        for(k = 0; k < len; k++) {
            v = JS_GetPropertyInt64(ctx, arrayLike, k);
            if (JS_IsException(v))
                goto exception;
            if (mapping) {
                args[0] = v;
                args[1] = JS_NewInt32(ctx, k);
                v2 = JS_Call(ctx, mapfn, this_arg, 2, args);
                JS_FreeValue(ctx, v);
                v = v2;
                if (JS_IsException(v))
                    goto exception;
            }
            if (JS_DefinePropertyValueInt64(ctx, r, k, v,
                                            JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                goto exception;
        }
    }
    if (JS_SetProperty(ctx, r, JS_ATOM_length, JS_NewUint32(ctx, k)) < 0)
        goto exception;
    goto done;

 exception_close:
    if (!JS_IsUndefined(stack[0]))
        JS_IteratorClose(ctx, stack[0], TRUE);
 exception:
    JS_FreeValue(ctx, r);
    r = JS_EXCEPTION;
 done:
    JS_FreeValue(ctx, arrayLike);
    JS_FreeValue(ctx, stack[0]);
    JS_FreeValue(ctx, stack[1]);
    return r;
}

static JSValue js_array_of(JSContext *ctx, JSValueConst this_val,
                           int argc, JSValueConst *argv)
{
    JSValue obj, args[1];
    int i;

    if (JS_IsConstructor(ctx, this_val)) {
        args[0] = JS_NewInt32(ctx, argc);
        obj = JS_CallConstructor(ctx, this_val, 1, (JSValueConst *)args);
    } else {
        obj = JS_NewArray(ctx);
    }
    if (JS_IsException(obj))
        return JS_EXCEPTION;
    for(i = 0; i < argc; i++) {
        if (JS_CreateDataPropertyUint32(ctx, obj, i, JS_DupValue(ctx, argv[i]),
                                        JS_PROP_THROW) < 0) {
            goto fail;
        }
    }
    if (JS_SetProperty(ctx, obj, JS_ATOM_length, JS_NewUint32(ctx, argc)) < 0) {
    fail:
        JS_FreeValue(ctx, obj);
        return JS_EXCEPTION;
    }
    return obj;
}

static JSValue js_array_isArray(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    int ret;
    ret = JS_IsArray(ctx, argv[0]);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_get_this(JSContext *ctx,
                           JSValueConst this_val)
{
    return JS_DupValue(ctx, this_val);
}

static JSValue JS_ArraySpeciesCreate(JSContext *ctx, JSValueConst obj,
                                     JSValueConst len_val)
{
    JSValue ctor, ret, species;
    int res;
    JSContext *realm;

    res = JS_IsArray(ctx, obj);
    if (res < 0)
        return JS_EXCEPTION;
    if (!res)
        return js_array_constructor(ctx, JS_UNDEFINED, 1, &len_val);
    ctor = JS_GetProperty(ctx, obj, JS_ATOM_constructor);
    if (JS_IsException(ctor))
        return ctor;
    if (JS_IsConstructor(ctx, ctor)) {
        /* legacy web compatibility */
        realm = JS_GetFunctionRealm(ctx, ctor);
        if (!realm) {
            JS_FreeValue(ctx, ctor);
            return JS_EXCEPTION;
        }
        if (realm != ctx &&
            js_same_value(ctx, ctor, realm->array_ctor)) {
            JS_FreeValue(ctx, ctor);
            ctor = JS_UNDEFINED;
        }
    }
    if (JS_IsObject(ctor)) {
        species = JS_GetProperty(ctx, ctor, JS_ATOM_Symbol_species);
        JS_FreeValue(ctx, ctor);
        if (JS_IsException(species))
            return species;
        ctor = species;
        if (JS_IsNull(ctor))
            ctor = JS_UNDEFINED;
    }
    if (JS_IsUndefined(ctor)) {
        return js_array_constructor(ctx, JS_UNDEFINED, 1, &len_val);
    } else {
        ret = JS_CallConstructor(ctx, ctor, 1, &len_val);
        JS_FreeValue(ctx, ctor);
        return ret;
    }
}

static const JSCFunctionListEntry js_array_funcs[] = {
    JS_CFUNC_DEF("isArray", 1, js_array_isArray ),
    JS_CFUNC_DEF("from", 1, js_array_from ),
    JS_CFUNC_DEF("of", 0, js_array_of ),
    JS_CGETSET_DEF("[Symbol.species]", js_get_this, NULL ),
};

static int JS_isConcatSpreadable(JSContext *ctx, JSValueConst obj)
{
    JSValue val;

    if (!JS_IsObject(obj))
        return FALSE;
    val = JS_GetProperty(ctx, obj, JS_ATOM_Symbol_isConcatSpreadable);
    if (JS_IsException(val))
        return -1;
    if (!JS_IsUndefined(val))
        return JS_ToBoolFree(ctx, val);
    return JS_IsArray(ctx, obj);
}

static JSValue js_array_concat(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv)
{
    JSValue obj, arr, val;
    JSValueConst e;
    int64_t len, k, n;
    int i, res;

    arr = JS_UNDEFINED;
    obj = JS_ToObject(ctx, this_val);
    if (JS_IsException(obj))
        goto exception;

    arr = JS_ArraySpeciesCreate(ctx, obj, JS_NewInt32(ctx, 0));
    if (JS_IsException(arr))
        goto exception;
    n = 0;
    for (i = -1; i < argc; i++) {
        if (i < 0)
            e = obj;
        else
            e = argv[i];

        res = JS_isConcatSpreadable(ctx, e);
        if (res < 0)
            goto exception;
        if (res) {
            if (js_get_length64(ctx, &len, e))
                goto exception;
            if (n + len > MAX_SAFE_INTEGER) {
                JS_ThrowTypeError(ctx, "Array loo long");
                goto exception;
            }
            for (k = 0; k < len; k++, n++) {
                res = JS_TryGetPropertyInt64(ctx, e, k, &val);
                if (res < 0)
                    goto exception;
                if (res) {
                    if (JS_DefinePropertyValueInt64(ctx, arr, n, val,
                                                    JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                        goto exception;
                }
            }
        } else {
            if (n >= MAX_SAFE_INTEGER) {
                JS_ThrowTypeError(ctx, "Array loo long");
                goto exception;
            }
            if (JS_DefinePropertyValueInt64(ctx, arr, n, JS_DupValue(ctx, e),
                                            JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                goto exception;
            n++;
        }
    }
    if (JS_SetProperty(ctx, arr, JS_ATOM_length, JS_NewInt64(ctx, n)) < 0)
        goto exception;

    JS_FreeValue(ctx, obj);
    return arr;

exception:
    JS_FreeValue(ctx, arr);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

#define special_every    0
#define special_some     1
#define special_forEach  2
#define special_map      3
#define special_filter   4
#define special_TA       8

static int js_typed_array_get_length_internal(JSContext *ctx, JSValueConst obj);

static JSValue js_typed_array___speciesCreate(JSContext *ctx,
                                              JSValueConst this_val,
                                              int argc, JSValueConst *argv);

static JSValue js_array_every(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv, int special)
{
    JSValue obj, val, index_val, res, ret;
    JSValueConst args[3];
    JSValueConst func, this_arg;
    int64_t len, k, n;
    int present;

    ret = JS_UNDEFINED;
    val = JS_UNDEFINED;
    if (special & special_TA) {
        obj = JS_DupValue(ctx, this_val);
        len = js_typed_array_get_length_internal(ctx, obj);
        if (len < 0)
            goto exception;
    } else {
        obj = JS_ToObject(ctx, this_val);
        if (js_get_length64(ctx, &len, obj))
            goto exception;
    }
    func = argv[0];
    this_arg = JS_UNDEFINED;
    if (argc > 1)
        this_arg = argv[1];

    if (check_function(ctx, func))
        goto exception;

    switch (special) {
    case special_every:
    case special_every | special_TA:
        ret = JS_TRUE;
        break;
    case special_some:
    case special_some | special_TA:
        ret = JS_FALSE;
        break;
    case special_map:
        /* XXX: JS_ArraySpeciesCreate should take int64_t */
        ret = JS_ArraySpeciesCreate(ctx, obj, JS_NewInt64(ctx, len));
        if (JS_IsException(ret))
            goto exception;
        break;
    case special_filter:
        ret = JS_ArraySpeciesCreate(ctx, obj, JS_NewInt32(ctx, 0));
        if (JS_IsException(ret))
            goto exception;
        break;
    case special_map | special_TA:
        args[0] = obj;
        args[1] = JS_NewInt32(ctx, len);
        ret = js_typed_array___speciesCreate(ctx, JS_UNDEFINED, 2, args);
        if (JS_IsException(ret))
            goto exception;
        break;
    case special_filter | special_TA:
        ret = JS_NewArray(ctx);
        if (JS_IsException(ret))
            goto exception;
        break;
    }
    n = 0;

    for(k = 0; k < len; k++) {
        if (special & special_TA) {
            val = JS_GetPropertyInt64(ctx, obj, k);
            if (JS_IsException(val))
                goto exception;
            present = TRUE;
        } else {
            present = JS_TryGetPropertyInt64(ctx, obj, k, &val);
            if (present < 0)
                goto exception;
        }
        if (present) {
            index_val = JS_NewInt64(ctx, k);
            if (JS_IsException(index_val))
                goto exception;
            args[0] = val;
            args[1] = index_val;
            args[2] = obj;
            res = JS_Call(ctx, func, this_arg, 3, args);
            JS_FreeValue(ctx, index_val);
            if (JS_IsException(res))
                goto exception;
            switch (special) {
            case special_every:
            case special_every | special_TA:
                if (!JS_ToBoolFree(ctx, res)) {
                    ret = JS_FALSE;
                    goto done;
                }
                break;
            case special_some:
            case special_some | special_TA:
                if (JS_ToBoolFree(ctx, res)) {
                    ret = JS_TRUE;
                    goto done;
                }
                break;
            case special_map:
                if (JS_DefinePropertyValueInt64(ctx, ret, k, res,
                                                JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                    goto exception;
                break;
            case special_map | special_TA:
                if (JS_SetPropertyValue(ctx, ret, JS_NewInt32(ctx, k), res, JS_PROP_THROW) < 0)
                    goto exception;
                break;
            case special_filter:
            case special_filter | special_TA:
                if (JS_ToBoolFree(ctx, res)) {
                    if (JS_DefinePropertyValueInt64(ctx, ret, n++, JS_DupValue(ctx, val),
                                                    JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                        goto exception;
                }
                break;
            default:
                JS_FreeValue(ctx, res);
                break;
            }
            JS_FreeValue(ctx, val);
            val = JS_UNDEFINED;
        }
    }
done:
    if (special == (special_filter | special_TA)) {
        JSValue arr;
        args[0] = obj;
        args[1] = JS_NewInt32(ctx, n);
        arr = js_typed_array___speciesCreate(ctx, JS_UNDEFINED, 2, args);
        if (JS_IsException(arr))
            goto exception;
        args[0] = ret;
        res = JS_Invoke(ctx, arr, JS_ATOM_set, 1, args);
        if (check_exception_free(ctx, res))
            goto exception;
        JS_FreeValue(ctx, ret);
        ret = arr;
    }
    JS_FreeValue(ctx, val);
    JS_FreeValue(ctx, obj);
    return ret;

exception:
    JS_FreeValue(ctx, ret);
    JS_FreeValue(ctx, val);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

#define special_reduce       0
#define special_reduceRight  1

static JSValue js_array_reduce(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv, int special)
{
    JSValue obj, val, index_val, acc, acc1;
    JSValueConst args[4];
    JSValueConst func;
    int64_t len, k, k1;
    int present;

    acc = JS_UNDEFINED;
    val = JS_UNDEFINED;
    if (special & special_TA) {
        obj = JS_DupValue(ctx, this_val);
        len = js_typed_array_get_length_internal(ctx, obj);
        if (len < 0)
            goto exception;
    } else {
        obj = JS_ToObject(ctx, this_val);
        if (js_get_length64(ctx, &len, obj))
            goto exception;
    }
    func = argv[0];

    if (check_function(ctx, func))
        goto exception;

    k = 0;
    if (argc > 1) {
        acc = JS_DupValue(ctx, argv[1]);
    } else {
        for(;;) {
            if (k >= len) {
                JS_ThrowTypeError(ctx, "empty array");
                goto exception;
            }
            k1 = (special & special_reduceRight) ? len - k - 1 : k;
            k++;
            if (special & special_TA) {
                acc = JS_GetPropertyInt64(ctx, obj, k1);
                if (JS_IsException(acc))
                    goto exception;
                break;
            } else {
                present = JS_TryGetPropertyInt64(ctx, obj, k1, &acc);
                if (present < 0)
                    goto exception;
                if (present)
                    break;
            }
        }
    }
    for (; k < len; k++) {
        k1 = (special & special_reduceRight) ? len - k - 1 : k;
        if (special & special_TA) {
            val = JS_GetPropertyInt64(ctx, obj, k1);
            if (JS_IsException(val))
                goto exception;
            present = TRUE;
        } else {
            present = JS_TryGetPropertyInt64(ctx, obj, k1, &val);
            if (present < 0)
                goto exception;
        }
        if (present) {
            index_val = JS_NewInt64(ctx, k1);
            if (JS_IsException(index_val))
                goto exception;
            args[0] = acc;
            args[1] = val;
            args[2] = index_val;
            args[3] = obj;
            acc1 = JS_Call(ctx, func, JS_UNDEFINED, 4, args);
            JS_FreeValue(ctx, index_val);
            JS_FreeValue(ctx, val);
            val = JS_UNDEFINED;
            if (JS_IsException(acc1))
                goto exception;
            JS_FreeValue(ctx, acc);
            acc = acc1;
        }
    }
    JS_FreeValue(ctx, obj);
    return acc;

exception:
    JS_FreeValue(ctx, acc);
    JS_FreeValue(ctx, val);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_array_fill(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv)
{
    JSValue obj;
    int64_t len, start, end;

    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &len, obj))
        goto exception;

    start = 0;
    if (argc > 1 && !JS_IsUndefined(argv[1])) {
        if (JS_ToInt64Clamp(ctx, &start, argv[1], 0, len, len))
            goto exception;
    }

    end = len;
    if (argc > 2 && !JS_IsUndefined(argv[2])) {
        if (JS_ToInt64Clamp(ctx, &end, argv[2], 0, len, len))
            goto exception;
    }

    /* XXX: should special case fast arrays */
    while (start < end) {
        if (JS_SetPropertyInt64(ctx, obj, start,
                                JS_DupValue(ctx, argv[0])) < 0)
            goto exception;
        start++;
    }
    return obj;

 exception:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_array_includes(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    JSValue obj, val;
    int64_t len, n, res;
    JSValue *arrp;
    uint32_t count;

    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &len, obj))
        goto exception;

    res = FALSE;
    if (len > 0) {
        n = 0;
        if (argc > 1) {
            if (JS_ToInt64Clamp(ctx, &n, argv[1], 0, len, len))
                goto exception;
        }
        if (js_get_fast_array(ctx, obj, &arrp, &count)) {
            for (; n < count; n++) {
                if (js_strict_eq2(ctx, JS_DupValue(ctx, argv[0]),
                                  JS_DupValue(ctx, arrp[n]),
                                  JS_EQ_SAME_VALUE_ZERO)) {
                    res = TRUE;
                    goto done;
                }
            }
        }
        for (; n < len; n++) {
            val = JS_GetPropertyInt64(ctx, obj, n);
            if (JS_IsException(val))
                goto exception;
            if (js_strict_eq2(ctx, JS_DupValue(ctx, argv[0]), val,
                              JS_EQ_SAME_VALUE_ZERO)) {
                res = TRUE;
                break;
            }
        }
    }
 done:
    JS_FreeValue(ctx, obj);
    return JS_NewBool(ctx, res);

 exception:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_array_indexOf(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSValue obj, val;
    int64_t len, n, res;
    JSValue *arrp;
    uint32_t count;

    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &len, obj))
        goto exception;

    res = -1;
    if (len > 0) {
        n = 0;
        if (argc > 1) {
            if (JS_ToInt64Clamp(ctx, &n, argv[1], 0, len, len))
                goto exception;
        }
        if (js_get_fast_array(ctx, obj, &arrp, &count)) {
            for (; n < count; n++) {
                if (js_strict_eq2(ctx, JS_DupValue(ctx, argv[0]),
                                  JS_DupValue(ctx, arrp[n]), JS_EQ_STRICT)) {
                    res = n;
                    goto done;
                }
            }
        }
        for (; n < len; n++) {
            int present = JS_TryGetPropertyInt64(ctx, obj, n, &val);
            if (present < 0)
                goto exception;
            if (present) {
                if (js_strict_eq2(ctx, JS_DupValue(ctx, argv[0]), val, JS_EQ_STRICT)) {
                    res = n;
                    break;
                }
            }
        }
    }
 done:
    JS_FreeValue(ctx, obj);
    return JS_NewInt64(ctx, res);

 exception:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_array_lastIndexOf(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    JSValue obj, val;
    int64_t len, n, res;
    int present;

    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &len, obj))
        goto exception;

    res = -1;
    if (len > 0) {
        n = len - 1;
        if (argc > 1) {
            if (JS_ToInt64Clamp(ctx, &n, argv[1], -1, len - 1, len))
                goto exception;
        }
        /* XXX: should special case fast arrays */
        for (; n >= 0; n--) {
            present = JS_TryGetPropertyInt64(ctx, obj, n, &val);
            if (present < 0)
                goto exception;
            if (present) {
                if (js_strict_eq2(ctx, JS_DupValue(ctx, argv[0]), val, JS_EQ_STRICT)) {
                    res = n;
                    break;
                }
            }
        }
    }
    JS_FreeValue(ctx, obj);
    return JS_NewInt64(ctx, res);

 exception:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_array_find(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv, int findIndex)
{
    JSValueConst func, this_arg;
    JSValueConst args[3];
    JSValue obj, val, index_val, res;
    int64_t len, k;

    index_val = JS_UNDEFINED;
    val = JS_UNDEFINED;
    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &len, obj))
        goto exception;

    func = argv[0];
    if (check_function(ctx, func))
        goto exception;

    this_arg = JS_UNDEFINED;
    if (argc > 1)
        this_arg = argv[1];

    for(k = 0; k < len; k++) {
        index_val = JS_NewInt64(ctx, k);
        if (JS_IsException(index_val))
            goto exception;
        val = JS_GetPropertyValue(ctx, obj, index_val);
        if (JS_IsException(val))
            goto exception;
        args[0] = val;
        args[1] = index_val;
        args[2] = this_val;
        res = JS_Call(ctx, func, this_arg, 3, args);
        if (JS_IsException(res))
            goto exception;
        if (JS_ToBoolFree(ctx, res)) {
            if (findIndex) {
                JS_FreeValue(ctx, val);
                JS_FreeValue(ctx, obj);
                return index_val;
            } else {
                JS_FreeValue(ctx, index_val);
                JS_FreeValue(ctx, obj);
                return val;
            }
        }
        JS_FreeValue(ctx, val);
        JS_FreeValue(ctx, index_val);
    }
    JS_FreeValue(ctx, obj);
    if (findIndex)
        return JS_NewInt32(ctx, -1);
    else
        return JS_UNDEFINED;

exception:
    JS_FreeValue(ctx, index_val);
    JS_FreeValue(ctx, val);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_array_toString(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    JSValue obj, method, ret;

    obj = JS_ToObject(ctx, this_val);
    if (JS_IsException(obj))
        return JS_EXCEPTION;
    method = JS_GetProperty(ctx, obj, JS_ATOM_join);
    if (JS_IsException(method)) {
        ret = JS_EXCEPTION;
    } else
    if (!JS_IsFunction(ctx, method)) {
        /* Use intrinsic Object.prototype.toString */
        JS_FreeValue(ctx, method);
        ret = js_object_toString(ctx, obj, 0, NULL);
    } else {
        ret = JS_CallFree(ctx, method, obj, 0, NULL);
    }
    JS_FreeValue(ctx, obj);
    return ret;
}

static JSValue js_array_join(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv, int toLocaleString)
{
    JSValue obj, sep = JS_UNDEFINED, el;
    StringBuffer b_s, *b = &b_s;
    JSString *p = NULL;
    int64_t i, n;
    int c;

    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &n, obj))
        goto exception;

    c = ',';    /* default separator */
    if (!toLocaleString && argc > 0 && !JS_IsUndefined(argv[0])) {
        sep = JS_ToString(ctx, argv[0]);
        if (JS_IsException(sep))
            goto exception;
        p = JS_VALUE_GET_STRING(sep);
        if (p->len == 1 && !p->is_wide_char)
            c = p->u.str8[0];
        else
            c = -1;
    }
    string_buffer_init(ctx, b, 0);

    for(i = 0; i < n; i++) {
        if (i > 0) {
            if (c >= 0) {
                string_buffer_putc8(b, c);
            } else {
                string_buffer_concat(b, p, 0, p->len);
            }
        }
        el = JS_GetPropertyUint32(ctx, obj, i);
        if (JS_IsException(el))
            goto fail;
        if (!JS_IsNull(el) && !JS_IsUndefined(el)) {
            if (toLocaleString) {
                el = JS_ToLocaleStringFree(ctx, el);
            }
            if (string_buffer_concat_value_free(b, el))
                goto fail;
        }
    }
    JS_FreeValue(ctx, sep);
    JS_FreeValue(ctx, obj);
    return string_buffer_end(b);

fail:
    string_buffer_free(b);
    JS_FreeValue(ctx, sep);
exception:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_array_pop(JSContext *ctx, JSValueConst this_val,
                            int argc, JSValueConst *argv, int shift)
{
    JSValue obj, res = JS_UNDEFINED;
    int64_t len, newLen;
    JSValue *arrp;
    uint32_t count32;

    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &len, obj))
        goto exception;
    newLen = 0;
    if (len > 0) {
        newLen = len - 1;
        /* Special case fast arrays */
        if (js_get_fast_array(ctx, obj, &arrp, &count32) && count32 == len) {
            JSObject *p = JS_VALUE_GET_OBJ(obj);
            if (shift) {
                res = arrp[0];
                memmove(arrp, arrp + 1, (count32 - 1) * sizeof(*arrp));
                p->u.array.count--;
            } else {
                res = arrp[count32 - 1];
                p->u.array.count--;
            }
        } else {
            if (shift) {
                res = JS_GetPropertyInt64(ctx, obj, 0);
                if (JS_IsException(res))
                    goto exception;
                if (JS_CopySubArray(ctx, obj, 0, 1, len - 1, +1))
                    goto exception;
            } else {
                res = JS_GetPropertyInt64(ctx, obj, newLen);
                if (JS_IsException(res))
                    goto exception;
            }
            if (JS_DeletePropertyInt64(ctx, obj, newLen, JS_PROP_THROW) < 0)
                goto exception;
        }
    }
    if (JS_SetProperty(ctx, obj, JS_ATOM_length, JS_NewInt64(ctx, newLen)) < 0)
        goto exception;

    JS_FreeValue(ctx, obj);
    return res;

 exception:
    JS_FreeValue(ctx, res);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_array_push(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv, int unshift)
{
    JSValue obj;
    int i;
    int64_t len, from, newLen;

    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &len, obj))
        goto exception;
    newLen = len + argc;
    if (newLen > MAX_SAFE_INTEGER) {
        JS_ThrowTypeError(ctx, "Array loo long");
        goto exception;
    }
    from = len;
    if (unshift && argc > 0) {
        if (JS_CopySubArray(ctx, obj, argc, 0, len, -1))
            goto exception;
        from = 0;
    }
    for(i = 0; i < argc; i++) {
        if (JS_SetPropertyInt64(ctx, obj, from + i,
                                JS_DupValue(ctx, argv[i])) < 0)
            goto exception;
    }
    if (JS_SetProperty(ctx, obj, JS_ATOM_length, JS_NewInt64(ctx, newLen)) < 0)
        goto exception;

    JS_FreeValue(ctx, obj);
    return JS_NewInt64(ctx, newLen);

 exception:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_array_reverse(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSValue obj, lval, hval;
    JSValue *arrp;
    int64_t len, l, h;
    int l_present, h_present;
    uint32_t count32;

    lval = JS_UNDEFINED;
    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &len, obj))
        goto exception;

    /* Special case fast arrays */
    if (js_get_fast_array(ctx, obj, &arrp, &count32) && count32 == len) {
        uint32_t ll, hh;

        if (count32 > 1) {
            for (ll = 0, hh = count32 - 1; ll < hh; ll++, hh--) {
                lval = arrp[ll];
                arrp[ll] = arrp[hh];
                arrp[hh] = lval;
            }
        }
        return obj;
    }

    for (l = 0, h = len - 1; l < h; l++, h--) {
        l_present = JS_TryGetPropertyInt64(ctx, obj, l, &lval);
        if (l_present < 0)
            goto exception;
        h_present = JS_TryGetPropertyInt64(ctx, obj, h, &hval);
        if (h_present < 0)
            goto exception;
        if (h_present) {
            if (JS_SetPropertyInt64(ctx, obj, l, hval) < 0)
                goto exception;

            if (l_present) {
                if (JS_SetPropertyInt64(ctx, obj, h, lval) < 0) {
                    lval = JS_UNDEFINED;
                    goto exception;
                }
                lval = JS_UNDEFINED;
            } else {
                if (JS_DeletePropertyInt64(ctx, obj, h, JS_PROP_THROW) < 0)
                    goto exception;
            }
        } else {
            if (l_present) {
                if (JS_DeletePropertyInt64(ctx, obj, l, JS_PROP_THROW) < 0)
                    goto exception;
                if (JS_SetPropertyInt64(ctx, obj, h, lval) < 0) {
                    lval = JS_UNDEFINED;
                    goto exception;
                }
                lval = JS_UNDEFINED;
            }
        }
    }
    return obj;

 exception:
    JS_FreeValue(ctx, lval);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_array_slice(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv, int splice)
{
    JSValue obj, arr, val, len_val;
    int64_t len, start, k, final, n, count, del_count = 0, new_len;
    int kPresent;
    JSValue *arrp;
    uint32_t count32, i, item_count;

    arr = JS_UNDEFINED;
    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &len, obj))
        goto exception;

    if (JS_ToInt64Clamp(ctx, &start, argv[0], 0, len, len))
        goto exception;

    if (splice) {
        if (argc == 0) {
            item_count = 0;
            del_count = 0;
        } else
        if (argc == 1) {
            item_count = 0;
            del_count = len - start;
        } else {
            item_count = argc - 2;
            if (JS_ToInt64Clamp(ctx, &del_count, argv[1], 0, len - start, 0))
                goto exception;
        }
        if (len + item_count - del_count > MAX_SAFE_INTEGER) {
            JS_ThrowTypeError(ctx, "Array loo long");
            goto exception;
        }
        count = del_count;
    } else {
        item_count = 0; /* avoid warning */
        final = len;
        if (!JS_IsUndefined(argv[1])) {
            if (JS_ToInt64Clamp(ctx, &final, argv[1], 0, len, len))
                goto exception;
        }
        count = max_int64(final - start, 0);
    }
    len_val = JS_NewInt64(ctx, count);
    arr = JS_ArraySpeciesCreate(ctx, obj, len_val);
    JS_FreeValue(ctx, len_val);
    if (JS_IsException(arr))
        goto exception;

    k = start;
    final = start + count;
    n = 0;
    /* The fast array test on arr ensures that
       JS_CreateDataPropertyUint32() won't modify obj in case arr is
       an exotic object */
    /* Special case fast arrays */
    if (js_get_fast_array(ctx, obj, &arrp, &count32) &&
        js_is_fast_array(ctx, arr)) {
        /* XXX: should share code with fast array constructor */
        for (; k < final && k < count32; k++, n++) {
            if (JS_CreateDataPropertyUint32(ctx, arr, n, JS_DupValue(ctx, arrp[k]), JS_PROP_THROW) < 0)
                goto exception;
        }
    }
    /* Copy the remaining elements if any (handle case of inherited properties) */
    for (; k < final; k++, n++) {
        kPresent = JS_TryGetPropertyInt64(ctx, obj, k, &val);
        if (kPresent < 0)
            goto exception;
        if (kPresent) {
            if (JS_CreateDataPropertyUint32(ctx, arr, n, val, JS_PROP_THROW) < 0)
                goto exception;
        }
    }
    if (JS_SetProperty(ctx, arr, JS_ATOM_length, JS_NewInt64(ctx, n)) < 0)
        goto exception;

    if (splice) {
        new_len = len + item_count - del_count;
        if (item_count != del_count) {
            if (JS_CopySubArray(ctx, obj, start + item_count,
                                start + del_count, len - (start + del_count),
                                item_count <= del_count ? +1 : -1) < 0)
                goto exception;

            for (k = len; k-- > new_len; ) {
                if (JS_DeletePropertyInt64(ctx, obj, k, JS_PROP_THROW) < 0)
                    goto exception;
            }
        }
        for (i = 0; i < item_count; i++) {
            if (JS_SetPropertyInt64(ctx, obj, start + i, JS_DupValue(ctx, argv[i + 2])) < 0)
                goto exception;
        }
        if (JS_SetProperty(ctx, obj, JS_ATOM_length, JS_NewInt64(ctx, new_len)) < 0)
            goto exception;
    }
    JS_FreeValue(ctx, obj);
    return arr;

 exception:
    JS_FreeValue(ctx, obj);
    JS_FreeValue(ctx, arr);
    return JS_EXCEPTION;
}

static JSValue js_array_copyWithin(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    JSValue obj;
    int64_t len, from, to, final, count;

    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &len, obj))
        goto exception;

    if (JS_ToInt64Clamp(ctx, &to, argv[0], 0, len, len))
        goto exception;

    if (JS_ToInt64Clamp(ctx, &from, argv[1], 0, len, len))
        goto exception;

    final = len;
    if (argc > 2 && !JS_IsUndefined(argv[2])) {
        if (JS_ToInt64Clamp(ctx, &final, argv[2], 0, len, len))
            goto exception;
    }

    count = min_int64(final - from, len - to);

    if (JS_CopySubArray(ctx, obj, to, from, count,
                        (from < to && to < from + count) ? -1 : +1))
        goto exception;

    return obj;

 exception:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static int64_t JS_FlattenIntoArray(JSContext *ctx, JSValueConst target,
                                   JSValueConst source, int64_t sourceLen,
                                   int64_t targetIndex, int depth,
                                   JSValueConst mapperFunction,
                                   JSValueConst thisArg)
{
    JSValue element;
    int64_t sourceIndex, elementLen;
    int present, is_array;

    if (js_check_stack_overflow(ctx->rt, 0)) {
        JS_ThrowStackOverflow(ctx);
        return -1;
    }

    for (sourceIndex = 0; sourceIndex < sourceLen; sourceIndex++) {
        present = JS_TryGetPropertyInt64(ctx, source, sourceIndex, &element);
        if (present < 0)
            return -1;
        if (!present)
            continue;
        if (!JS_IsUndefined(mapperFunction)) {
            JSValueConst args[3] = { element, JS_NewInt64(ctx, sourceIndex), source };
            element = JS_Call(ctx, mapperFunction, thisArg, 3, args);
            JS_FreeValue(ctx, (JSValue)args[0]);
            JS_FreeValue(ctx, (JSValue)args[1]);
            if (JS_IsException(element))
                return -1;
        }
        if (depth > 0) {
            is_array = JS_IsArray(ctx, element);
            if (is_array < 0)
                goto fail;
            if (is_array) {
                if (js_get_length64(ctx, &elementLen, element) < 0)
                    goto fail;
                targetIndex = JS_FlattenIntoArray(ctx, target, element,
                                                  elementLen, targetIndex,
                                                  depth - 1,
                                                  JS_UNDEFINED, JS_UNDEFINED);
                if (targetIndex < 0)
                    goto fail;
                JS_FreeValue(ctx, element);
                continue;
            }
        }
        if (targetIndex >= MAX_SAFE_INTEGER) {
            JS_ThrowTypeError(ctx, "Array too long");
            goto fail;
        }
        if (JS_DefinePropertyValueInt64(ctx, target, targetIndex, element,
                                        JS_PROP_C_W_E | JS_PROP_THROW) < 0)
            return -1;
        targetIndex++;
    }
    return targetIndex;

fail:
    JS_FreeValue(ctx, element);
    return -1;
}

static JSValue js_array_flatten(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv, int map)
{
    JSValue obj, arr;
    JSValueConst mapperFunction, thisArg;
    int64_t sourceLen;
    int depthNum;

    arr = JS_UNDEFINED;
    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &sourceLen, obj))
        goto exception;

    depthNum = 1;
    mapperFunction = JS_UNDEFINED;
    thisArg = JS_UNDEFINED;
    if (map) {
        mapperFunction = argv[0];
        if (argc > 1) {
            thisArg = argv[1];
        }
        if (check_function(ctx, mapperFunction))
            goto exception;
    } else {
        if (argc > 0 && !JS_IsUndefined(argv[0])) {
            if (JS_ToInt32Sat(ctx, &depthNum, argv[0]) < 0)
                goto exception;
        }
    }
    arr = JS_ArraySpeciesCreate(ctx, obj, JS_NewInt32(ctx, 0));
    if (JS_IsException(arr))
        goto exception;
    if (JS_FlattenIntoArray(ctx, arr, obj, sourceLen, 0, depthNum,
                            mapperFunction, thisArg) < 0)
        goto exception;
    JS_FreeValue(ctx, obj);
    return arr;

exception:
    JS_FreeValue(ctx, obj);
    JS_FreeValue(ctx, arr);
    return JS_EXCEPTION;
}

/* Array sort */

typedef struct ValueSlot {
    JSValue val;
    JSString *str;
    int64_t pos;
} ValueSlot;

struct array_sort_context {
    JSContext *ctx;
    int exception;
    int has_method;
    JSValueConst method;
};

static int js_array_cmp_generic(const void *a, const void *b, void *opaque) {
    auto psc = (struct array_sort_context*) opaque;
    JSContext *ctx = psc->ctx;
    JSValueConst argv[2];
    JSValue res;
    ValueSlot *ap = (ValueSlot *)(void *)a;
    ValueSlot *bp = (ValueSlot *)(void *)b;
    int cmp;

    if (psc->exception)
        return 0;

    if (psc->has_method) {
        /* custom sort function is specified as returning 0 for identical
         * objects: avoid method call overhead.
         */
        if (!memcmp(&ap->val, &bp->val, sizeof(ap->val)))
            goto cmp_same;
        argv[0] = ap->val;
        argv[1] = bp->val;
        res = JS_Call(ctx, psc->method, JS_UNDEFINED, 2, argv);
        if (JS_IsException(res))
            goto exception;
        if (JS_VALUE_GET_TAG(res) == JS_TAG_INT) {
            int val = JS_VALUE_GET_INT(res);
            cmp = (val > 0) - (val < 0);
        } else {
            double val;
            if (JS_ToFloat64Free(ctx, &val, res) < 0)
                goto exception;
            cmp = (val > 0) - (val < 0);
        }
    } else {
        /* Not supposed to bypass ToString even for identical objects as
         * tested in test262/test/built-ins/Array/prototype/sort/bug_596_1.js
         */
        if (!ap->str) {
            JSValue str = JS_ToString(ctx, ap->val);
            if (JS_IsException(str))
                goto exception;
            ap->str = JS_VALUE_GET_STRING(str);
        }
        if (!bp->str) {
            JSValue str = JS_ToString(ctx, bp->val);
            if (JS_IsException(str))
                goto exception;
            bp->str = JS_VALUE_GET_STRING(str);
        }
        cmp = js_string_compare(ctx, ap->str, bp->str);
    }
    if (cmp != 0)
        return cmp;
cmp_same:
    /* make sort stable: compare array offsets */
    return (ap->pos > bp->pos) - (ap->pos < bp->pos);

exception:
    psc->exception = 1;
    return 0;
}

static JSValue js_array_sort(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv)
{
    struct array_sort_context asc = { ctx, 0, 0, argv[0] };
    JSValue obj = JS_UNDEFINED;
    ValueSlot *array = NULL;
    size_t array_size = 0, pos = 0, n = 0;
    int64_t i, len, undefined_count = 0;
    int present;

    if (!JS_IsUndefined(asc.method)) {
        if (check_function(ctx, asc.method))
            goto exception;
        asc.has_method = 1;
    }
    obj = JS_ToObject(ctx, this_val);
    if (js_get_length64(ctx, &len, obj))
        goto exception;

    /* XXX: should special case fast arrays */
    for (i = 0; i < len; i++) {
        if (pos >= array_size) {
            size_t new_size, slack;
            ValueSlot *new_array;
            new_size = (array_size + (array_size >> 1) + 31) & ~15;
            new_array = (ValueSlot*) js_realloc2(ctx, array, new_size * sizeof(*array), &slack);
            if (new_array == NULL)
                goto exception;
            new_size += slack / sizeof(*new_array);
            array = new_array;
            array_size = new_size;
        }
        present = JS_TryGetPropertyInt64(ctx, obj, i, &array[pos].val);
        if (present < 0)
            goto exception;
        if (present == 0)
            continue;
        if (JS_IsUndefined(array[pos].val)) {
            undefined_count++;
            continue;
        }
        array[pos].str = NULL;
        array[pos].pos = i;
        pos++;
    }
    rqsort(array, pos, sizeof(*array), js_array_cmp_generic, &asc);
    if (asc.exception)
        goto exception;

    /* XXX: should special case fast arrays */
    while (n < pos) {
        if (array[n].str)
            JS_FreeValue(ctx, JS_MKPTR(JS_TAG_STRING, array[n].str));
        if (array[n].pos == n) {
            JS_FreeValue(ctx, array[n].val);
        } else {
            if (JS_SetPropertyInt64(ctx, obj, n, array[n].val) < 0) {
                n++;
                goto exception;
            }
        }
        n++;
    }
    js_free(ctx, array);
    for (i = n; undefined_count-- > 0; i++) {
        if (JS_SetPropertyInt64(ctx, obj, i, JS_UNDEFINED) < 0)
            goto fail;
    }
    for (; i < len; i++) {
        if (JS_DeletePropertyInt64(ctx, obj, i, JS_PROP_THROW) < 0)
            goto fail;
    }
    return obj;

exception:
    for (; n < pos; n++) {
        JS_FreeValue(ctx, array[n].val);
        if (array[n].str)
            JS_FreeValue(ctx, JS_MKPTR(JS_TAG_STRING, array[n].str));
    }
    js_free(ctx, array);
fail:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

typedef struct JSArrayIteratorData {
    JSValue obj;
    JSIteratorKindEnum kind;
    uint32_t idx;
} JSArrayIteratorData;

static void js_array_iterator_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSArrayIteratorData *it = p->u.array_iterator_data;
    if (it) {
        JS_FreeValueRT(rt, it->obj);
        js_free_rt(rt, it);
    }
}

static void js_array_iterator_mark(JSRuntime *rt, JSValueConst val,
                                   JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSArrayIteratorData *it = p->u.array_iterator_data;
    if (it) {
        JS_MarkValue(rt, it->obj, mark_func);
    }
}

static JSValue js_create_array(JSContext *ctx, int len, JSValueConst *tab)
{
    JSValue obj;
    int i;

    obj = JS_NewArray(ctx);
    if (JS_IsException(obj))
        return JS_EXCEPTION;
    for(i = 0; i < len; i++) {
        if (JS_CreateDataPropertyUint32(ctx, obj, i, JS_DupValue(ctx, tab[i]), 0) < 0) {
            JS_FreeValue(ctx, obj);
            return JS_EXCEPTION;
        }
    }
    return obj;
}

static JSValue js_create_array_iterator(JSContext *ctx, JSValueConst this_val,
                                        int argc, JSValueConst *argv, int magic)
{
    JSValue enum_obj, arr;
    JSArrayIteratorData *it;
    int class_id;

    auto kind = (JSIteratorKindEnum) (magic & 3);
    if (magic & 4) {
        /* string iterator case */
        arr = JS_ToStringCheckObject(ctx, this_val);
        class_id = JS_CLASS_STRING_ITERATOR;
    } else {
        arr = JS_ToObject(ctx, this_val);
        class_id = JS_CLASS_ARRAY_ITERATOR;
    }
    if (JS_IsException(arr))
        goto fail;
    enum_obj = JS_NewObjectClass(ctx, class_id);
    if (JS_IsException(enum_obj))
        goto fail;
    it = (JSArrayIteratorData*) js_malloc(ctx, sizeof(*it));
    if (!it)
        goto fail1;
    it->obj = arr;
    it->kind = kind;
    it->idx = 0;
    JS_SetOpaque(enum_obj, it);
    return enum_obj;
 fail1:
    JS_FreeValue(ctx, enum_obj);
 fail:
    JS_FreeValue(ctx, arr);
    return JS_EXCEPTION;
}

static JSValue js_array_iterator_next(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv,
                                      BOOL *pdone, int magic)
{
    JSArrayIteratorData *it;
    uint32_t len, idx;
    JSValue val, obj;
    JSObject *p;

    it = (JSArrayIteratorData*) JS_GetOpaque2(ctx, this_val, JS_CLASS_ARRAY_ITERATOR);
    if (!it)
        goto fail1;
    if (JS_IsUndefined(it->obj))
        goto done;
    p = JS_VALUE_GET_OBJ(it->obj);
    if (p->class_id >= JS_CLASS_UINT8C_ARRAY &&
        p->class_id <= JS_CLASS_FLOAT64_ARRAY) {
        if (typed_array_is_detached(ctx, p)) {
            JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
            goto fail1;
        }
        len = p->u.array.count;
    } else {
        if (js_get_length32(ctx, &len, it->obj)) {
        fail1:
            *pdone = FALSE;
            return JS_EXCEPTION;
        }
    }
    idx = it->idx;
    if (idx >= len) {
        JS_FreeValue(ctx, it->obj);
        it->obj = JS_UNDEFINED;
    done:
        *pdone = TRUE;
        return JS_UNDEFINED;
    }
    it->idx = idx + 1;
    *pdone = FALSE;
    if (it->kind == JS_ITERATOR_KIND_KEY) {
        return JS_NewUint32(ctx, idx);
    } else {
        val = JS_GetPropertyUint32(ctx, it->obj, idx);
        if (JS_IsException(val))
            return JS_EXCEPTION;
        if (it->kind == JS_ITERATOR_KIND_VALUE) {
            return val;
        } else {
            JSValueConst args[2];
            JSValue num;
            num = JS_NewUint32(ctx, idx);
            args[0] = num;
            args[1] = val;
            obj = js_create_array(ctx, 2, args);
            JS_FreeValue(ctx, val);
            JS_FreeValue(ctx, num);
            return obj;
        }
    }
}

static JSValue js_iterator_proto_iterator(JSContext *ctx, JSValueConst this_val,
                                          int argc, JSValueConst *argv)
{
    return JS_DupValue(ctx, this_val);
}

static const JSCFunctionListEntry js_iterator_proto_funcs[] = {
    JS_CFUNC_DEF("[Symbol.iterator]", 0, js_iterator_proto_iterator ),
};

static const JSCFunctionListEntry js_array_proto_funcs[] = {
    JS_CFUNC_DEF("concat", 1, js_array_concat ),
    JS_CFUNC_MAGIC_DEF("every", 1, js_array_every, special_every ),
    JS_CFUNC_MAGIC_DEF("some", 1, js_array_every, special_some ),
    JS_CFUNC_MAGIC_DEF("forEach", 1, js_array_every, special_forEach ),
    JS_CFUNC_MAGIC_DEF("map", 1, js_array_every, special_map ),
    JS_CFUNC_MAGIC_DEF("filter", 1, js_array_every, special_filter ),
    JS_CFUNC_MAGIC_DEF("reduce", 1, js_array_reduce, special_reduce ),
    JS_CFUNC_MAGIC_DEF("reduceRight", 1, js_array_reduce, special_reduceRight ),
    JS_CFUNC_DEF("fill", 1, js_array_fill ),
    JS_CFUNC_MAGIC_DEF("find", 1, js_array_find, 0 ),
    JS_CFUNC_MAGIC_DEF("findIndex", 1, js_array_find, 1 ),
    JS_CFUNC_DEF("indexOf", 1, js_array_indexOf ),
    JS_CFUNC_DEF("lastIndexOf", 1, js_array_lastIndexOf ),
    JS_CFUNC_DEF("includes", 1, js_array_includes ),
    JS_CFUNC_MAGIC_DEF("join", 1, js_array_join, 0 ),
    JS_CFUNC_DEF("toString", 0, js_array_toString ),
    JS_CFUNC_MAGIC_DEF("toLocaleString", 0, js_array_join, 1 ),
    JS_CFUNC_MAGIC_DEF("pop", 0, js_array_pop, 0 ),
    JS_CFUNC_MAGIC_DEF("push", 1, js_array_push, 0 ),
    JS_CFUNC_MAGIC_DEF("shift", 0, js_array_pop, 1 ),
    JS_CFUNC_MAGIC_DEF("unshift", 1, js_array_push, 1 ),
    JS_CFUNC_DEF("reverse", 0, js_array_reverse ),
    JS_CFUNC_DEF("sort", 1, js_array_sort ),
    JS_CFUNC_MAGIC_DEF("slice", 2, js_array_slice, 0 ),
    JS_CFUNC_MAGIC_DEF("splice", 2, js_array_slice, 1 ),
    JS_CFUNC_DEF("copyWithin", 2, js_array_copyWithin ),
    JS_CFUNC_MAGIC_DEF("flatMap", 1, js_array_flatten, 1 ),
    JS_CFUNC_MAGIC_DEF("flat", 0, js_array_flatten, 0 ),
    JS_CFUNC_MAGIC_DEF("values", 0, js_create_array_iterator, JS_ITERATOR_KIND_VALUE ),
    JS_ALIAS_DEF("[Symbol.iterator]", "values" ),
    JS_CFUNC_MAGIC_DEF("keys", 0, js_create_array_iterator, JS_ITERATOR_KIND_KEY ),
    JS_CFUNC_MAGIC_DEF("entries", 0, js_create_array_iterator, JS_ITERATOR_KIND_KEY_AND_VALUE ),
};

static const JSCFunctionListEntry js_array_iterator_proto_funcs[] = {
    JS_ITERATOR_NEXT_DEF("next", 0, js_array_iterator_next, 0 ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "Array Iterator", JS_PROP_CONFIGURABLE ),
};

/* Number */

static JSValue js_number_constructor(JSContext *ctx, JSValueConst new_target,
                                     int argc, JSValueConst *argv)
{
    JSValue val, obj;
    if (argc == 0) {
        val = JS_NewInt32(ctx, 0);
    } else {
        val = JS_ToNumeric(ctx, argv[0]);
        if (JS_IsException(val))
            return val;
        switch(JS_VALUE_GET_TAG(val)) {
#ifdef CONFIG_BIGNUM
        case JS_TAG_BIG_INT:
        case JS_TAG_BIG_FLOAT:
            {
                JSBigFloat *p = JS_VALUE_GET_PTR(val);
                double d;
                bf_get_float64(&p->num, &d, BF_RNDN);
                JS_FreeValue(ctx, val);
                val = __JS_NewFloat64(ctx, d);
            }
            break;
        case JS_TAG_BIG_DECIMAL:
            val = JS_ToStringFree(ctx, val);
            if (JS_IsException(val))
                return val;
            val = JS_ToNumberFree(ctx, val);
            if (JS_IsException(val))
                return val;
            break;
#endif
        default:
            break;
        }
    }
    if (!JS_IsUndefined(new_target)) {
        obj = js_create_from_ctor(ctx, new_target, JS_CLASS_NUMBER);
        if (!JS_IsException(obj))
            JS_SetObjectData(ctx, obj, val);
        return obj;
    } else {
        return val;
    }
}

#if 0
static JSValue js_number___toInteger(JSContext *ctx, JSValueConst this_val,
                                     int argc, JSValueConst *argv)
{
    return JS_ToIntegerFree(ctx, JS_DupValue(ctx, argv[0]));
}

static JSValue js_number___toLength(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    int64_t v;
    if (JS_ToLengthFree(ctx, &v, JS_DupValue(ctx, argv[0])))
        return JS_EXCEPTION;
    return JS_NewInt64(ctx, v);
}
#endif

static JSValue js_number_isNaN(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv)
{
    if (!JS_IsNumber(argv[0]))
        return JS_FALSE;
    return js_global_isNaN(ctx, this_val, argc, argv);
}

static JSValue js_number_isFinite(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    if (!JS_IsNumber(argv[0]))
        return JS_FALSE;
    return js_global_isFinite(ctx, this_val, argc, argv);
}

static JSValue js_number_isInteger(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    int ret;
    ret = JS_NumberIsInteger(ctx, argv[0]);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_number_isSafeInteger(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    double d;
    if (!JS_IsNumber(argv[0]))
        return JS_FALSE;
    if (js_unlikely(JS_ToFloat64(ctx, &d, argv[0])))
        return JS_EXCEPTION;
    return JS_NewBool(ctx, is_safe_integer(d));
}

static const JSCFunctionListEntry js_number_funcs[] = {
    /* global ParseInt and parseFloat should be defined already or delayed */
    JS_ALIAS_BASE_DEF("parseInt", "parseInt", 0 ),
    JS_ALIAS_BASE_DEF("parseFloat", "parseFloat", 0 ),
    JS_CFUNC_DEF("isNaN", 1, js_number_isNaN ),
    JS_CFUNC_DEF("isFinite", 1, js_number_isFinite ),
    JS_CFUNC_DEF("isInteger", 1, js_number_isInteger ),
    JS_CFUNC_DEF("isSafeInteger", 1, js_number_isSafeInteger ),
    JS_PROP_DOUBLE_DEF("MAX_VALUE", 1.7976931348623157e+308, 0 ),
    JS_PROP_DOUBLE_DEF("MIN_VALUE", 5e-324, 0 ),
    JS_PROP_DOUBLE_DEF("NaN", NAN, 0 ),
    JS_PROP_DOUBLE_DEF("NEGATIVE_INFINITY", -INFINITY, 0 ),
    JS_PROP_DOUBLE_DEF("POSITIVE_INFINITY", INFINITY, 0 ),
    JS_PROP_DOUBLE_DEF("EPSILON", 2.220446049250313e-16, 0 ), /* ES6 */
    JS_PROP_DOUBLE_DEF("MAX_SAFE_INTEGER", 9007199254740991.0, 0 ), /* ES6 */
    JS_PROP_DOUBLE_DEF("MIN_SAFE_INTEGER", -9007199254740991.0, 0 ), /* ES6 */
    //JS_CFUNC_DEF("__toInteger", 1, js_number___toInteger ),
    //JS_CFUNC_DEF("__toLength", 1, js_number___toLength ),
};

static JSValue js_thisNumberValue(JSContext *ctx, JSValueConst this_val)
{
    if (JS_IsNumber(this_val))
        return JS_DupValue(ctx, this_val);

    if (JS_VALUE_GET_TAG(this_val) == JS_TAG_OBJECT) {
        JSObject *p = JS_VALUE_GET_OBJ(this_val);
        if (p->class_id == JS_CLASS_NUMBER) {
            if (JS_IsNumber(p->u.object_data))
                return JS_DupValue(ctx, p->u.object_data);
        }
    }
    return JS_ThrowTypeError(ctx, "not a number");
}

static JSValue js_number_valueOf(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    return js_thisNumberValue(ctx, this_val);
}

static int js_get_radix(JSContext *ctx, JSValueConst val)
{
    int radix;
    if (JS_ToInt32Sat(ctx, &radix, val))
        return -1;
    if (radix < 2 || radix > 36) {
        JS_ThrowRangeError(ctx, "radix must be between 2 and 36");
        return -1;
    }
    return radix;
}

static JSValue js_number_toString(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv, int magic)
{
    JSValue val;
    int base;
    double d;

    val = js_thisNumberValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    if (magic || JS_IsUndefined(argv[0])) {
        base = 10;
    } else {
        base = js_get_radix(ctx, argv[0]);
        if (base < 0)
            goto fail;
    }
    if (JS_ToFloat64Free(ctx, &d, val))
        return JS_EXCEPTION;
    return js_dtoa(ctx, d, base, 0, JS_DTOA_VAR_FORMAT);
 fail:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static JSValue js_number_toFixed(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    JSValue val;
    int f;
    double d;

    val = js_thisNumberValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    if (JS_ToFloat64Free(ctx, &d, val))
        return JS_EXCEPTION;
    if (JS_ToInt32Sat(ctx, &f, argv[0]))
        return JS_EXCEPTION;
    if (f < 0 || f > 100)
        return JS_ThrowRangeError(ctx, "invalid number of digits");
    if (fabs(d) >= 1e21) {
        return JS_ToStringFree(ctx, __JS_NewFloat64(ctx, d));
    } else {
        return js_dtoa(ctx, d, 10, f, JS_DTOA_FRAC_FORMAT);
    }
}

static JSValue js_number_toExponential(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    JSValue val;
    int f, flags;
    double d;

    val = js_thisNumberValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    if (JS_ToFloat64Free(ctx, &d, val))
        return JS_EXCEPTION;
    if (JS_ToInt32Sat(ctx, &f, argv[0]))
        return JS_EXCEPTION;
    if (!isfinite(d)) {
        return JS_ToStringFree(ctx,  __JS_NewFloat64(ctx, d));
    }
    if (JS_IsUndefined(argv[0])) {
        flags = 0;
        f = 0;
    } else {
        if (f < 0 || f > 100)
            return JS_ThrowRangeError(ctx, "invalid number of digits");
        f++;
        flags = JS_DTOA_FIXED_FORMAT;
    }
    return js_dtoa(ctx, d, 10, f, flags | JS_DTOA_FORCE_EXP);
}

static JSValue js_number_toPrecision(JSContext *ctx, JSValueConst this_val,
                                     int argc, JSValueConst *argv)
{
    JSValue val;
    int p;
    double d;

    val = js_thisNumberValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    if (JS_ToFloat64Free(ctx, &d, val))
        return JS_EXCEPTION;
    if (JS_IsUndefined(argv[0]))
        goto to_string;
    if (JS_ToInt32Sat(ctx, &p, argv[0]))
        return JS_EXCEPTION;
    if (!isfinite(d)) {
    to_string:
        return JS_ToStringFree(ctx,  __JS_NewFloat64(ctx, d));
    }
    if (p < 1 || p > 100)
        return JS_ThrowRangeError(ctx, "invalid number of digits");
    return js_dtoa(ctx, d, 10, p, JS_DTOA_FIXED_FORMAT);
}

static const JSCFunctionListEntry js_number_proto_funcs[] = {
    JS_CFUNC_DEF("toExponential", 1, js_number_toExponential ),
    JS_CFUNC_DEF("toFixed", 1, js_number_toFixed ),
    JS_CFUNC_DEF("toPrecision", 1, js_number_toPrecision ),
    JS_CFUNC_MAGIC_DEF("toString", 1, js_number_toString, 0 ),
    JS_CFUNC_MAGIC_DEF("toLocaleString", 0, js_number_toString, 1 ),
    JS_CFUNC_DEF("valueOf", 0, js_number_valueOf ),
};

static JSValue js_parseInt(JSContext *ctx, JSValueConst this_val,
                           int argc, JSValueConst *argv)
{
    const char *str, *p;
    int radix, flags;
    JSValue ret;

    str = JS_ToCString(ctx, argv[0]);
    if (!str)
        return JS_EXCEPTION;
    if (JS_ToInt32(ctx, &radix, argv[1])) {
        JS_FreeCString(ctx, str);
        return JS_EXCEPTION;
    }
    if (radix != 0 && (radix < 2 || radix > 36)) {
        ret = JS_NAN;
    } else {
        p = str;
        p += skip_spaces(p);
        flags = ATOD_INT_ONLY | ATOD_ACCEPT_PREFIX_AFTER_SIGN;
        ret = js_atof(ctx, p, NULL, radix, flags);
    }
    JS_FreeCString(ctx, str);
    return ret;
}

static JSValue js_parseFloat(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv)
{
    const char *str, *p;
    JSValue ret;

    str = JS_ToCString(ctx, argv[0]);
    if (!str)
        return JS_EXCEPTION;
    p = str;
    p += skip_spaces(p);
    ret = js_atof(ctx, p, NULL, 10, 0);
    JS_FreeCString(ctx, str);
    return ret;
}

/* Boolean */
static JSValue js_boolean_constructor(JSContext *ctx, JSValueConst new_target,
                                     int argc, JSValueConst *argv)
{
    JSValue val, obj;
    val = JS_NewBool(ctx, JS_ToBool(ctx, argv[0]));
    if (!JS_IsUndefined(new_target)) {
        obj = js_create_from_ctor(ctx, new_target, JS_CLASS_BOOLEAN);
        if (!JS_IsException(obj))
            JS_SetObjectData(ctx, obj, val);
        return obj;
    } else {
        return val;
    }
}

static JSValue js_thisBooleanValue(JSContext *ctx, JSValueConst this_val)
{
    if (JS_VALUE_GET_TAG(this_val) == JS_TAG_BOOL)
        return JS_DupValue(ctx, this_val);

    if (JS_VALUE_GET_TAG(this_val) == JS_TAG_OBJECT) {
        JSObject *p = JS_VALUE_GET_OBJ(this_val);
        if (p->class_id == JS_CLASS_BOOLEAN) {
            if (JS_VALUE_GET_TAG(p->u.object_data) == JS_TAG_BOOL)
                return p->u.object_data;
        }
    }
    return JS_ThrowTypeError(ctx, "not a boolean");
}

static JSValue js_boolean_toString(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    JSValue val = js_thisBooleanValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    return JS_AtomToString(ctx, JS_VALUE_GET_BOOL(val) ?
                       JS_ATOM_true : JS_ATOM_false);
}

static JSValue js_boolean_valueOf(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    return js_thisBooleanValue(ctx, this_val);
}

static const JSCFunctionListEntry js_boolean_proto_funcs[] = {
    JS_CFUNC_DEF("toString", 0, js_boolean_toString ),
    JS_CFUNC_DEF("valueOf", 0, js_boolean_valueOf ),
};

/* String */

static int js_string_get_own_property(JSContext *ctx,
                                      JSPropertyDescriptor *desc,
                                      JSValueConst obj, JSAtom prop)
{
    JSObject *p;
    JSString *p1;
    uint32_t idx, ch;

    /* This is a class exotic method: obj class_id is JS_CLASS_STRING */
    if (__JS_AtomIsTaggedInt(prop)) {
        p = JS_VALUE_GET_OBJ(obj);
        if (JS_VALUE_GET_TAG(p->u.object_data) == JS_TAG_STRING) {
            p1 = JS_VALUE_GET_STRING(p->u.object_data);
            idx = __JS_AtomToUInt32(prop);
            if (idx < p1->len) {
                if (desc) {
                    if (p1->is_wide_char)
                        ch = p1->u.str16[idx];
                    else
                        ch = p1->u.str8[idx];
                    desc->flags = JS_PROP_ENUMERABLE;
                    desc->value = js_new_string_char(ctx, ch);
                    desc->getter = JS_UNDEFINED;
                    desc->setter = JS_UNDEFINED;
                }
                return TRUE;
            }
        }
    }
    return FALSE;
}

static int js_string_define_own_property(JSContext *ctx,
                                         JSValueConst this_obj,
                                         JSAtom prop, JSValueConst val,
                                         JSValueConst getter,
                                         JSValueConst setter, int flags)
{
    uint32_t idx;
    JSObject *p;
    JSString *p1, *p2;

    if (__JS_AtomIsTaggedInt(prop)) {
        idx = __JS_AtomToUInt32(prop);
        p = JS_VALUE_GET_OBJ(this_obj);
        if (JS_VALUE_GET_TAG(p->u.object_data) != JS_TAG_STRING)
            goto def;
        p1 = JS_VALUE_GET_STRING(p->u.object_data);
        if (idx >= p1->len)
            goto def;
        if (!check_define_prop_flags(JS_PROP_ENUMERABLE, flags))
            goto fail;
        /* check that the same value is configured */
        if (flags & JS_PROP_HAS_VALUE) {
            if (JS_VALUE_GET_TAG(val) != JS_TAG_STRING)
                goto fail;
            p2 = JS_VALUE_GET_STRING(val);
            if (p2->len != 1)
                goto fail;
            if (string_get(p1, idx) != string_get(p2, 0)) {
            fail:
                return JS_ThrowTypeErrorOrFalse(ctx, flags, "property is not configurable");
            }
        }
        return TRUE;
    } else {
    def:
        return JS_DefineProperty(ctx, this_obj, prop, val, getter, setter,
                                 flags | JS_PROP_NO_EXOTIC);
    }
}

static int js_string_delete_property(JSContext *ctx,
                                     JSValueConst obj, JSAtom prop)
{
    uint32_t idx;

    if (__JS_AtomIsTaggedInt(prop)) {
        idx = __JS_AtomToUInt32(prop);
        if (idx < js_string_obj_get_length(ctx, obj)) {
            return FALSE;
        }
    }
    return TRUE;
}

inline const JSClassExoticMethods js_string_exotic_methods = {
    js_string_get_own_property, nullptr, js_string_delete_property,
    js_string_define_own_property, nullptr, nullptr, nullptr
};

static JSValue js_string_constructor(JSContext *ctx, JSValueConst new_target,
                                     int argc, JSValueConst *argv)
{
    JSValue val, obj;
    if (argc == 0) {
        val = JS_AtomToString(ctx, JS_ATOM_empty_string);
    } else {
        if (JS_IsUndefined(new_target) && JS_IsSymbol(argv[0])) {
            auto p = (JSAtomStruct*) JS_VALUE_GET_PTR(argv[0]);
            val = JS_ConcatString3(ctx, "Symbol(", JS_AtomToString(ctx, js_get_atom_index(ctx->rt, p)), ")");
        } else {
            val = JS_ToString(ctx, argv[0]);
        }
        if (JS_IsException(val))
            return val;
    }
    if (!JS_IsUndefined(new_target)) {
        JSString *p1 = JS_VALUE_GET_STRING(val);

        obj = js_create_from_ctor(ctx, new_target, JS_CLASS_STRING);
        if (!JS_IsException(obj)) {
            JS_SetObjectData(ctx, obj, val);
            JS_DefinePropertyValue(ctx, obj, JS_ATOM_length, JS_NewInt32(ctx, p1->len), 0);
        }
        return obj;
    } else {
        return val;
    }
}

static JSValue js_thisStringValue(JSContext *ctx, JSValueConst this_val)
{
    if (JS_VALUE_GET_TAG(this_val) == JS_TAG_STRING)
        return JS_DupValue(ctx, this_val);

    if (JS_VALUE_GET_TAG(this_val) == JS_TAG_OBJECT) {
        JSObject *p = JS_VALUE_GET_OBJ(this_val);
        if (p->class_id == JS_CLASS_STRING) {
            if (JS_VALUE_GET_TAG(p->u.object_data) == JS_TAG_STRING)
                return JS_DupValue(ctx, p->u.object_data);
        }
    }
    return JS_ThrowTypeError(ctx, "not a string");
}

static JSValue js_string_fromCharCode(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv)
{
    int i;
    StringBuffer b_s, *b = &b_s;

    string_buffer_init(ctx, b, argc);

    for(i = 0; i < argc; i++) {
        int32_t c;
        if (JS_ToInt32(ctx, &c, argv[i]) || string_buffer_putc16(b, c & 0xffff)) {
            string_buffer_free(b);
            return JS_EXCEPTION;
        }
    }
    return string_buffer_end(b);
}

static JSValue js_string_fromCodePoint(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    double d;
    int i, c;
    StringBuffer b_s, *b = &b_s;

    /* XXX: could pre-compute string length if all arguments are JS_TAG_INT */

    if (string_buffer_init(ctx, b, argc))
        goto fail;
    for(i = 0; i < argc; i++) {
        if (JS_VALUE_GET_TAG(argv[i]) == JS_TAG_INT) {
            c = JS_VALUE_GET_INT(argv[i]);
            if (c < 0 || c > 0x10ffff)
                goto range_error;
        } else {
            if (JS_ToFloat64(ctx, &d, argv[i]))
                goto fail;
            if (d < 0 || d > 0x10ffff || (c = (int)d) != d)
                goto range_error;
        }
        if (string_buffer_putc(b, c))
            goto fail;
    }
    return string_buffer_end(b);

 range_error:
    JS_ThrowRangeError(ctx, "invalid code point");
 fail:
    string_buffer_free(b);
    return JS_EXCEPTION;
}

static JSValue js_string_raw(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv)
{
    // raw(temp,...a)
    JSValue cooked, val, raw;
    StringBuffer b_s, *b = &b_s;
    int64_t i, n;

    string_buffer_init(ctx, b, 0);
    raw = JS_UNDEFINED;
    cooked = JS_ToObject(ctx, argv[0]);
    if (JS_IsException(cooked))
        goto exception;
    raw = JS_ToObjectFree(ctx, JS_GetProperty(ctx, cooked, JS_ATOM_raw));
    if (JS_IsException(raw))
        goto exception;
    if (js_get_length64(ctx, &n, raw) < 0)
        goto exception;

    for (i = 0; i < n; i++) {
        val = JS_ToStringFree(ctx, JS_GetPropertyInt64(ctx, raw, i));
        if (JS_IsException(val))
            goto exception;
        string_buffer_concat_value_free(b, val);
        if (i < n - 1 && i + 1 < argc) {
            if (string_buffer_concat_value(b, argv[i + 1]))
                goto exception;
        }
    }
    JS_FreeValue(ctx, cooked);
    JS_FreeValue(ctx, raw);
    return string_buffer_end(b);

exception:
    JS_FreeValue(ctx, cooked);
    JS_FreeValue(ctx, raw);
    string_buffer_free(b);
    return JS_EXCEPTION;
}

/* only used in test262 */
inline JSValue js_string_codePointRange(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    uint32_t start, end, i, n;
    StringBuffer b_s, *b = &b_s;

    if (JS_ToUint32(ctx, &start, argv[0]) ||
        JS_ToUint32(ctx, &end, argv[1]))
        return JS_EXCEPTION;
    end = min_uint32(end, 0x10ffff + 1);

    if (start > end) {
        start = end;
    }
    n = end - start;
    if (end > 0x10000) {
        n += end - max_uint32(start, 0x10000);
    }
    if (string_buffer_init2(ctx, b, n, end >= 0x100))
        return JS_EXCEPTION;
    for(i = start; i < end; i++) {
        string_buffer_putc(b, i);
    }
    return string_buffer_end(b);
}

#if 0
static JSValue js_string___isSpace(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    int c;
    if (JS_ToInt32(ctx, &c, argv[0]))
        return JS_EXCEPTION;
    return JS_NewBool(ctx, lre_is_space(c));
}
#endif

static JSValue js_string_charCodeAt(JSContext *ctx, JSValueConst this_val,
                                     int argc, JSValueConst *argv)
{
    JSValue val, ret;
    JSString *p;
    int idx, c;

    val = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(val))
        return val;
    p = JS_VALUE_GET_STRING(val);
    if (JS_ToInt32Sat(ctx, &idx, argv[0])) {
        JS_FreeValue(ctx, val);
        return JS_EXCEPTION;
    }
    if (idx < 0 || idx >= p->len) {
        ret = JS_NAN;
    } else {
        if (p->is_wide_char)
            c = p->u.str16[idx];
        else
            c = p->u.str8[idx];
        ret = JS_NewInt32(ctx, c);
    }
    JS_FreeValue(ctx, val);
    return ret;
}

static JSValue js_string_charAt(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSValue val, ret;
    JSString *p;
    int idx, c;

    val = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(val))
        return val;
    p = JS_VALUE_GET_STRING(val);
    if (JS_ToInt32Sat(ctx, &idx, argv[0])) {
        JS_FreeValue(ctx, val);
        return JS_EXCEPTION;
    }
    if (idx < 0 || idx >= p->len) {
        ret = js_new_string8(ctx, NULL, 0);
    } else {
        if (p->is_wide_char)
            c = p->u.str16[idx];
        else
            c = p->u.str8[idx];
        ret = js_new_string_char(ctx, c);
    }
    JS_FreeValue(ctx, val);
    return ret;
}

static JSValue js_string_codePointAt(JSContext *ctx, JSValueConst this_val,
                                     int argc, JSValueConst *argv)
{
    JSValue val, ret;
    JSString *p;
    int idx, c;

    val = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(val))
        return val;
    p = JS_VALUE_GET_STRING(val);
    if (JS_ToInt32Sat(ctx, &idx, argv[0])) {
        JS_FreeValue(ctx, val);
        return JS_EXCEPTION;
    }
    if (idx < 0 || idx >= p->len) {
        ret = JS_UNDEFINED;
    } else {
        c = string_getc(p, &idx);
        ret = JS_NewInt32(ctx, c);
    }
    JS_FreeValue(ctx, val);
    return ret;
}

static JSValue js_string_concat(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSValue r;
    int i;

    /* XXX: Use more efficient method */
    /* XXX: This method is OK if r has a single refcount */
    /* XXX: should use string_buffer? */
    r = JS_ToStringCheckObject(ctx, this_val);
    for (i = 0; i < argc; i++) {
        if (JS_IsException(r))
            break;
        r = JS_ConcatString(ctx, r, JS_DupValue(ctx, argv[i]));
    }
    return r;
}

static int string_cmp(JSString *p1, JSString *p2, int x1, int x2, int len)
{
    int i, c1, c2;
    for (i = 0; i < len; i++) {
        if ((c1 = string_get(p1, x1 + i)) != (c2 = string_get(p2, x2 + i)))
            return c1 - c2;
    }
    return 0;
}

static int string_indexof_char(JSString *p, int c, int from)
{
    /* assuming 0 <= from <= p->len */
    int i, len = p->len;
    if (p->is_wide_char) {
        for (i = from; i < len; i++) {
            if (p->u.str16[i] == c)
                return i;
        }
    } else {
        if ((c & ~0xff) == 0) {
            for (i = from; i < len; i++) {
                if (p->u.str8[i] == (uint8_t)c)
                    return i;
            }
        }
    }
    return -1;
}

static int string_indexof(JSString *p1, JSString *p2, int from)
{
    /* assuming 0 <= from <= p1->len */
    int c, i, j, len1 = p1->len, len2 = p2->len;
    if (len2 == 0)
        return from;
    for (i = from, c = string_get(p2, 0); i + len2 <= len1; i = j + 1) {
        j = string_indexof_char(p1, c, i);
        if (j < 0 || j + len2 > len1)
            break;
        if (!string_cmp(p1, p2, j + 1, 1, len2 - 1))
            return j;
    }
    return -1;
}

static int64_t string_advance_index(JSString *p, int64_t index, BOOL unicode)
{
    if (!unicode || index >= p->len || !p->is_wide_char) {
        index++;
    } else {
        int index32 = (int)index;
        string_getc(p, &index32);
        index = index32;
    }
    return index;
}

static JSValue js_string_indexOf(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv, int lastIndexOf)
{
    JSValue str, v;
    int i, len, v_len, pos, start, stop, ret, inc;
    JSString *p;
    JSString *p1;

    str = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(str))
        return str;
    v = JS_ToString(ctx, argv[0]);
    if (JS_IsException(v))
        goto fail;
    p = JS_VALUE_GET_STRING(str);
    p1 = JS_VALUE_GET_STRING(v);
    len = p->len;
    v_len = p1->len;
    if (lastIndexOf) {
        pos = len - v_len;
        if (argc > 1) {
            double d;
            if (JS_ToFloat64(ctx, &d, argv[1]))
                goto fail;
            if (!isnan(d)) {
                if (d <= 0)
                    pos = 0;
                else if (d < pos)
                    pos = d;
            }
        }
        start = pos;
        stop = 0;
        inc = -1;
    } else {
        pos = 0;
        if (argc > 1) {
            if (JS_ToInt32Clamp(ctx, &pos, argv[1], 0, len, 0))
                goto fail;
        }
        start = pos;
        stop = len - v_len;
        inc = 1;
    }
    ret = -1;
    if (len >= v_len && inc * (stop - start) >= 0) {
        for (i = start;; i += inc) {
            if (!string_cmp(p, p1, i, 0, v_len)) {
                ret = i;
                break;
            }
            if (i == stop)
                break;
        }
    }
    JS_FreeValue(ctx, str);
    JS_FreeValue(ctx, v);
    return JS_NewInt32(ctx, ret);

fail:
    JS_FreeValue(ctx, str);
    JS_FreeValue(ctx, v);
    return JS_EXCEPTION;
}

/* return < 0 if exception or TRUE/FALSE */
static int js_is_regexp(JSContext *ctx, JSValueConst obj);

static JSValue js_string_includes(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv, int magic)
{
    JSValue str, v = JS_UNDEFINED;
    int i, len, v_len, pos, start, stop, ret;
    JSString *p;
    JSString *p1;

    str = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(str))
        return str;
    ret = js_is_regexp(ctx, argv[0]);
    if (ret) {
        if (ret > 0)
            JS_ThrowTypeError(ctx, "regex not supported");
        goto fail;
    }
    v = JS_ToString(ctx, argv[0]);
    if (JS_IsException(v))
        goto fail;
    p = JS_VALUE_GET_STRING(str);
    p1 = JS_VALUE_GET_STRING(v);
    len = p->len;
    v_len = p1->len;
    pos = (magic == 2) ? len : 0;
    if (argc > 1 && !JS_IsUndefined(argv[1])) {
        if (JS_ToInt32Clamp(ctx, &pos, argv[1], 0, len, 0))
            goto fail;
    }
    len -= v_len;
    ret = 0;
    if (magic == 0) {
        start = pos;
        stop = len;
    } else {
        if (magic == 1) {
            if (pos > len)
                goto done;
        } else {
            pos -= v_len;
        }
        start = stop = pos;
    }
    if (start >= 0 && start <= stop) {
        for (i = start;; i++) {
            if (!string_cmp(p, p1, i, 0, v_len)) {
                ret = 1;
                break;
            }
            if (i == stop)
                break;
        }
    }
 done:
    JS_FreeValue(ctx, str);
    JS_FreeValue(ctx, v);
    return JS_NewBool(ctx, ret);

fail:
    JS_FreeValue(ctx, str);
    JS_FreeValue(ctx, v);
    return JS_EXCEPTION;
}

static int check_regexp_g_flag(JSContext *ctx, JSValueConst regexp)
{
    int ret;
    JSValue flags;

    ret = js_is_regexp(ctx, regexp);
    if (ret < 0)
        return -1;
    if (ret) {
        flags = JS_GetProperty(ctx, regexp, JS_ATOM_flags);
        if (JS_IsException(flags))
            return -1;
        if (JS_IsUndefined(flags) || JS_IsNull(flags)) {
            JS_ThrowTypeError(ctx, "cannot convert to object");
            return -1;
        }
        flags = JS_ToStringFree(ctx, flags);
        if (JS_IsException(flags))
            return -1;
        ret = string_indexof_char(JS_VALUE_GET_STRING(flags), 'g', 0);
        JS_FreeValue(ctx, flags);
        if (ret < 0) {
            JS_ThrowTypeError(ctx, "regexp must have the 'g' flag");
            return -1;
        }
    }
    return 0;
}

static JSValue js_string_match(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv, int atom)
{
    // match(rx), search(rx), matchAll(rx)
    // atom is JS_ATOM_Symbol_match, JS_ATOM_Symbol_search, or JS_ATOM_Symbol_matchAll
    JSValueConst O = this_val, regexp = argv[0], args[2];
    JSValue matcher, S, rx, result, str;
    int args_len;

    if (JS_IsUndefined(O) || JS_IsNull(O))
        return JS_ThrowTypeError(ctx, "cannot convert to object");

    if (!JS_IsUndefined(regexp) && !JS_IsNull(regexp)) {
        matcher = JS_GetProperty(ctx, regexp, atom);
        if (JS_IsException(matcher))
            return JS_EXCEPTION;
        if (atom == JS_ATOM_Symbol_matchAll) {
            if (check_regexp_g_flag(ctx, regexp) < 0) {
                JS_FreeValue(ctx, matcher);
                return JS_EXCEPTION;
            }
        }
        if (!JS_IsUndefined(matcher) && !JS_IsNull(matcher)) {
            return JS_CallFree(ctx, matcher, regexp, 1, &O);
        }
    }
    S = JS_ToString(ctx, O);
    if (JS_IsException(S))
        return JS_EXCEPTION;
    args_len = 1;
    args[0] = regexp;
    str = JS_UNDEFINED;
    if (atom == JS_ATOM_Symbol_matchAll) {
        str = JS_NewString(ctx, "g");
        if (JS_IsException(str))
            goto fail;
        args[args_len++] = (JSValueConst)str;
    }
    rx = JS_CallConstructor(ctx, ctx->regexp_ctor, args_len, args);
    JS_FreeValue(ctx, str);
    if (JS_IsException(rx)) {
    fail:
        JS_FreeValue(ctx, S);
        return JS_EXCEPTION;
    }
    result = JS_InvokeFree(ctx, rx, atom, 1, (JSValueConst *)&S);
    JS_FreeValue(ctx, S);
    return result;
}

static JSValue js_string___GetSubstitution(JSContext *ctx, JSValueConst this_val,
                                           int argc, JSValueConst *argv)
{
    // GetSubstitution(matched, str, position, captures, namedCaptures, rep)
    JSValueConst matched, str, captures, namedCaptures, rep;
    JSValue capture, name, s;
    uint32_t position, len, matched_len, captures_len;
    int i, j, j0, k, k1;
    int c, c1;
    StringBuffer b_s, *b = &b_s;
    JSString *sp, *rp;

    matched = argv[0];
    str = argv[1];
    captures = argv[3];
    namedCaptures = argv[4];
    rep = argv[5];

    if (!JS_IsString(rep) || !JS_IsString(str))
        return JS_ThrowTypeError(ctx, "not a string");

    sp = JS_VALUE_GET_STRING(str);
    rp = JS_VALUE_GET_STRING(rep);

    string_buffer_init(ctx, b, 0);

    captures_len = 0;
    if (!JS_IsUndefined(captures)) {
        if (js_get_length32(ctx, &captures_len, captures))
            goto exception;
    }
    if (js_get_length32(ctx, &matched_len, matched))
        goto exception;
    if (JS_ToUint32(ctx, &position, argv[2]) < 0)
        goto exception;

    len = rp->len;
    i = 0;
    for(;;) {
        j = string_indexof_char(rp, '$', i);
        if (j < 0 || j + 1 >= len)
            break;
        string_buffer_concat(b, rp, i, j);
        j0 = j++;
        c = string_get(rp, j++);
        if (c == '$') {
            string_buffer_putc8(b, '$');
        } else if (c == '&') {
            if (string_buffer_concat_value(b, matched))
                goto exception;
        } else if (c == '`') {
            string_buffer_concat(b, sp, 0, position);
        } else if (c == '\'') {
            string_buffer_concat(b, sp, position + matched_len, sp->len);
        } else if (c >= '0' && c <= '9') {
            k = c - '0';
            if (j < len) {
                c1 = string_get(rp, j);
                if (c1 >= '0' && c1 <= '9') {
                    /* This behavior is specified in ES6 and refined in ECMA 2019 */
                    /* ECMA 2019 does not have the extra test, but
                       Test262 S15.5.4.11_A3_T1..3 require this behavior */
                    k1 = k * 10 + c1 - '0';
                    if (k1 >= 1 && k1 < captures_len) {
                        k = k1;
                        j++;
                    }
                }
            }
            if (k >= 1 && k < captures_len) {
                s = JS_GetPropertyInt64(ctx, captures, k);
                if (JS_IsException(s))
                    goto exception;
                if (!JS_IsUndefined(s)) {
                    if (string_buffer_concat_value_free(b, s))
                        goto exception;
                }
            } else {
                goto norep;
            }
        } else if (c == '<' && !JS_IsUndefined(namedCaptures)) {
            k = string_indexof_char(rp, '>', j);
            if (k < 0)
                goto norep;
            name = js_sub_string(ctx, rp, j, k);
            if (JS_IsException(name))
                goto exception;
            capture = JS_GetPropertyValue(ctx, namedCaptures, name);
            if (JS_IsException(capture))
                goto exception;
            if (!JS_IsUndefined(capture)) {
                if (string_buffer_concat_value_free(b, capture))
                    goto exception;
            }
            j = k + 1;
        } else {
        norep:
            string_buffer_concat(b, rp, j0, j);
        }
        i = j;
    }
    string_buffer_concat(b, rp, i, rp->len);
    return string_buffer_end(b);
exception:
    string_buffer_free(b);
    return JS_EXCEPTION;
}

static JSValue js_string_replace(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv,
                                 int is_replaceAll)
{
    // replace(rx, rep)
    JSValueConst O = this_val, searchValue = argv[0], replaceValue = argv[1];
    JSValueConst args[6];
    JSValue str, search_str, replaceValue_str, repl_str;
    JSString *sp, *searchp;
    StringBuffer b_s, *b = &b_s;
    int pos, functionalReplace, endOfLastMatch;
    BOOL is_first;

    if (JS_IsUndefined(O) || JS_IsNull(O))
        return JS_ThrowTypeError(ctx, "cannot convert to object");

    search_str = JS_UNDEFINED;
    replaceValue_str = JS_UNDEFINED;
    repl_str = JS_UNDEFINED;

    if (!JS_IsUndefined(searchValue) && !JS_IsNull(searchValue)) {
        JSValue replacer;
        if (is_replaceAll) {
            if (check_regexp_g_flag(ctx, searchValue) < 0)
                return JS_EXCEPTION;
        }
        replacer = JS_GetProperty(ctx, searchValue, JS_ATOM_Symbol_replace);
        if (JS_IsException(replacer))
            return JS_EXCEPTION;
        if (!JS_IsUndefined(replacer) && !JS_IsNull(replacer)) {
            args[0] = O;
            args[1] = replaceValue;
            return JS_CallFree(ctx, replacer, searchValue, 2, args);
        }
    }
    string_buffer_init(ctx, b, 0);

    str = JS_ToString(ctx, O);
    if (JS_IsException(str))
        goto exception;
    search_str = JS_ToString(ctx, searchValue);
    if (JS_IsException(search_str))
        goto exception;
    functionalReplace = JS_IsFunction(ctx, replaceValue);
    if (!functionalReplace) {
        replaceValue_str = JS_ToString(ctx, replaceValue);
        if (JS_IsException(replaceValue_str))
            goto exception;
    }

    sp = JS_VALUE_GET_STRING(str);
    searchp = JS_VALUE_GET_STRING(search_str);
    endOfLastMatch = 0;
    is_first = TRUE;
    for(;;) {
        if (js_unlikely(searchp->len == 0)) {
            if (is_first)
                pos = 0;
            else if (endOfLastMatch >= sp->len)
                pos = -1;
            else
                pos = endOfLastMatch + 1;
        } else {
            pos = string_indexof(sp, searchp, endOfLastMatch);
        }
        if (pos < 0) {
            if (is_first) {
                string_buffer_free(b);
                JS_FreeValue(ctx, search_str);
                JS_FreeValue(ctx, replaceValue_str);
                return str;
            } else {
                break;
            }
        }
        if (functionalReplace) {
            args[0] = search_str;
            args[1] = JS_NewInt32(ctx, pos);
            args[2] = str;
            repl_str = JS_ToStringFree(ctx, JS_Call(ctx, replaceValue, JS_UNDEFINED, 3, args));
        } else {
            args[0] = search_str;
            args[1] = str;
            args[2] = JS_NewInt32(ctx, pos);
            args[3] = JS_UNDEFINED;
            args[4] = JS_UNDEFINED;
            args[5] = replaceValue_str;
            repl_str = js_string___GetSubstitution(ctx, JS_UNDEFINED, 6, args);
        }
        if (JS_IsException(repl_str))
            goto exception;

        string_buffer_concat(b, sp, endOfLastMatch, pos);
        string_buffer_concat_value_free(b, repl_str);
        endOfLastMatch = pos + searchp->len;
        is_first = FALSE;
        if (!is_replaceAll)
            break;
    }
    string_buffer_concat(b, sp, endOfLastMatch, sp->len);
    JS_FreeValue(ctx, search_str);
    JS_FreeValue(ctx, replaceValue_str);
    JS_FreeValue(ctx, str);
    return string_buffer_end(b);

exception:
    string_buffer_free(b);
    JS_FreeValue(ctx, search_str);
    JS_FreeValue(ctx, replaceValue_str);
    JS_FreeValue(ctx, str);
    return JS_EXCEPTION;
}

static JSValue js_string_split(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv)
{
    // split(sep, limit)
    JSValueConst O = this_val, separator = argv[0], limit = argv[1];
    JSValueConst args[2];
    JSValue S, A, R, T;
    uint32_t lim, lengthA;
    int64_t p, q, s, r, e;
    JSString *sp, *rp;

    if (JS_IsUndefined(O) || JS_IsNull(O))
        return JS_ThrowTypeError(ctx, "cannot convert to object");

    S = JS_UNDEFINED;
    A = JS_UNDEFINED;
    R = JS_UNDEFINED;

    if (!JS_IsUndefined(separator) && !JS_IsNull(separator)) {
        JSValue splitter;
        splitter = JS_GetProperty(ctx, separator, JS_ATOM_Symbol_split);
        if (JS_IsException(splitter))
            return JS_EXCEPTION;
        if (!JS_IsUndefined(splitter) && !JS_IsNull(splitter)) {
            args[0] = O;
            args[1] = limit;
            return JS_CallFree(ctx, splitter, separator, 2, args);
        }
    }
    S = JS_ToString(ctx, O);
    if (JS_IsException(S))
        goto exception;
    A = JS_NewArray(ctx);
    if (JS_IsException(A))
        goto exception;
    lengthA = 0;
    if (JS_IsUndefined(limit)) {
        lim = 0xffffffff;
    } else {
        if (JS_ToUint32(ctx, &lim, limit) < 0)
            goto exception;
    }
    sp = JS_VALUE_GET_STRING(S);
    s = sp->len;
    R = JS_ToString(ctx, separator);
    if (JS_IsException(R))
        goto exception;
    rp = JS_VALUE_GET_STRING(R);
    r = rp->len;
    p = 0;
    if (lim == 0)
        goto done;
    if (JS_IsUndefined(separator))
        goto add_tail;
    if (s == 0) {
        if (r != 0)
            goto add_tail;
        goto done;
    }
    q = p;
    for (q = p; (q += !r) <= s - r - !r; q = p = e + r) {
        e = string_indexof(sp, rp, q);
        if (e < 0)
            break;
        T = js_sub_string(ctx, sp, p, e);
        if (JS_IsException(T))
            goto exception;
        if (JS_CreateDataPropertyUint32(ctx, A, lengthA++, T, 0) < 0)
            goto exception;
        if (lengthA == lim)
            goto done;
    }
add_tail:
    T = js_sub_string(ctx, sp, p, s);
    if (JS_IsException(T))
        goto exception;
    if (JS_CreateDataPropertyUint32(ctx, A, lengthA++, T,0 ) < 0)
        goto exception;
done:
    JS_FreeValue(ctx, S);
    JS_FreeValue(ctx, R);
    return A;

exception:
    JS_FreeValue(ctx, A);
    JS_FreeValue(ctx, S);
    JS_FreeValue(ctx, R);
    return JS_EXCEPTION;
}

static JSValue js_string_substring(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    JSValue str, ret;
    int a, b, start, end;
    JSString *p;

    str = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(str))
        return str;
    p = JS_VALUE_GET_STRING(str);
    if (JS_ToInt32Clamp(ctx, &a, argv[0], 0, p->len, 0)) {
        JS_FreeValue(ctx, str);
        return JS_EXCEPTION;
    }
    b = p->len;
    if (!JS_IsUndefined(argv[1])) {
        if (JS_ToInt32Clamp(ctx, &b, argv[1], 0, p->len, 0)) {
            JS_FreeValue(ctx, str);
            return JS_EXCEPTION;
        }
    }
    if (a < b) {
        start = a;
        end = b;
    } else {
        start = b;
        end = a;
    }
    ret = js_sub_string(ctx, p, start, end);
    JS_FreeValue(ctx, str);
    return ret;
}

static JSValue js_string_substr(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSValue str, ret;
    int a, len, n;
    JSString *p;

    str = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(str))
        return str;
    p = JS_VALUE_GET_STRING(str);
    len = p->len;
    if (JS_ToInt32Clamp(ctx, &a, argv[0], 0, len, len)) {
        JS_FreeValue(ctx, str);
        return JS_EXCEPTION;
    }
    n = len - a;
    if (!JS_IsUndefined(argv[1])) {
        if (JS_ToInt32Clamp(ctx, &n, argv[1], 0, len - a, 0)) {
            JS_FreeValue(ctx, str);
            return JS_EXCEPTION;
        }
    }
    ret = js_sub_string(ctx, p, a, a + n);
    JS_FreeValue(ctx, str);
    return ret;
}

static JSValue js_string_slice(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv)
{
    JSValue str, ret;
    int len, start, end;
    JSString *p;

    str = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(str))
        return str;
    p = JS_VALUE_GET_STRING(str);
    len = p->len;
    if (JS_ToInt32Clamp(ctx, &start, argv[0], 0, len, len)) {
        JS_FreeValue(ctx, str);
        return JS_EXCEPTION;
    }
    end = len;
    if (!JS_IsUndefined(argv[1])) {
        if (JS_ToInt32Clamp(ctx, &end, argv[1], 0, len, len)) {
            JS_FreeValue(ctx, str);
            return JS_EXCEPTION;
        }
    }
    ret = js_sub_string(ctx, p, start, max_int(end, start));
    JS_FreeValue(ctx, str);
    return ret;
}

static JSValue js_string_pad(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv, int padEnd)
{
    JSValue str, v = JS_UNDEFINED;
    StringBuffer b_s, *b = &b_s;
    JSString *p, *p1 = NULL;
    int n, len, c = ' ';

    str = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(str))
        goto fail1;
    if (JS_ToInt32Sat(ctx, &n, argv[0]))
        goto fail2;
    p = JS_VALUE_GET_STRING(str);
    len = p->len;
    if (len >= n)
        return str;
    if (argc > 1 && !JS_IsUndefined(argv[1])) {
        v = JS_ToString(ctx, argv[1]);
        if (JS_IsException(v))
            goto fail2;
        p1 = JS_VALUE_GET_STRING(v);
        if (p1->len == 0) {
            JS_FreeValue(ctx, v);
            return str;
        }
        if (p1->len == 1) {
            c = string_get(p1, 0);
            p1 = NULL;
        }
    }
    if (n > JS_STRING_LEN_MAX) {
        JS_ThrowInternalError(ctx, "string too long");
        goto fail2;
    }
    if (string_buffer_init(ctx, b, n))
        goto fail3;
    n -= len;
    if (padEnd) {
        if (string_buffer_concat(b, p, 0, len))
            goto fail;
    }
    if (p1) {
        while (n > 0) {
            int chunk = min_int(n, p1->len);
            if (string_buffer_concat(b, p1, 0, chunk))
                goto fail;
            n -= chunk;
        }
    } else {
        if (string_buffer_fill(b, c, n))
            goto fail;
    }
    if (!padEnd) {
        if (string_buffer_concat(b, p, 0, len))
            goto fail;
    }
    JS_FreeValue(ctx, v);
    JS_FreeValue(ctx, str);
    return string_buffer_end(b);

fail:
    string_buffer_free(b);
fail3:
    JS_FreeValue(ctx, v);
fail2:
    JS_FreeValue(ctx, str);
fail1:
    return JS_EXCEPTION;
}

static JSValue js_string_repeat(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSValue str;
    StringBuffer b_s, *b = &b_s;
    JSString *p;
    int64_t val;
    int n, len;

    str = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(str))
        goto fail;
    if (JS_ToInt64Sat(ctx, &val, argv[0]))
        goto fail;
    if (val < 0 || val > 2147483647) {
        JS_ThrowRangeError(ctx, "invalid repeat count");
        goto fail;
    }
    n = val;
    p = JS_VALUE_GET_STRING(str);
    len = p->len;
    if (len == 0 || n == 1)
        return str;
    if (val * len > JS_STRING_LEN_MAX) {
        JS_ThrowInternalError(ctx, "string too long");
        goto fail;
    }
    if (string_buffer_init2(ctx, b, n * len, p->is_wide_char))
        goto fail;
    if (len == 1) {
        string_buffer_fill(b, string_get(p, 0), n);
    } else {
        while (n-- > 0) {
            string_buffer_concat(b, p, 0, len);
        }
    }
    JS_FreeValue(ctx, str);
    return string_buffer_end(b);

fail:
    JS_FreeValue(ctx, str);
    return JS_EXCEPTION;
}

static JSValue js_string_trim(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv, int magic)
{
    JSValue str, ret;
    int a, b, len;
    JSString *p;

    str = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(str))
        return str;
    p = JS_VALUE_GET_STRING(str);
    a = 0;
    b = len = p->len;
    if (magic & 1) {
        while (a < len && lre_is_space(string_get(p, a)))
            a++;
    }
    if (magic & 2) {
        while (b > a && lre_is_space(string_get(p, b - 1)))
            b--;
    }
    ret = js_sub_string(ctx, p, a, b);
    JS_FreeValue(ctx, str);
    return ret;
}

static JSValue js_string___quote(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    return JS_ToQuotedString(ctx, this_val);
}

/* return 0 if before the first char */
static int string_prevc(JSString *p, int *pidx)
{
    int idx, c, c1;

    idx = *pidx;
    if (idx <= 0)
        return 0;
    idx--;
    if (p->is_wide_char) {
        c = p->u.str16[idx];
        if (c >= 0xdc00 && c < 0xe000 && idx > 0) {
            c1 = p->u.str16[idx - 1];
            if (c1 >= 0xd800 && c1 <= 0xdc00) {
                c = (((c1 & 0x3ff) << 10) | (c & 0x3ff)) + 0x10000;
                idx--;
            }
        }
    } else {
        c = p->u.str8[idx];
    }
    *pidx = idx;
    return c;
}

static BOOL test_final_sigma(JSString *p, int sigma_pos)
{
    int k, c1;

    /* before C: skip case ignorable chars and check there is
       a cased letter */
    k = sigma_pos;
    for(;;) {
        c1 = string_prevc(p, &k);
        if (!lre_is_case_ignorable(c1))
            break;
    }
    if (!lre_is_cased(c1))
        return FALSE;

    /* after C: skip case ignorable chars and check there is
       no cased letter */
    k = sigma_pos + 1;
    for(;;) {
        if (k >= p->len)
            return TRUE;
        c1 = string_getc(p, &k);
        if (!lre_is_case_ignorable(c1))
            break;
    }
    return !lre_is_cased(c1);
}

static JSValue js_string_localeCompare(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    JSValue a, b;
    int cmp;

    a = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(a))
        return JS_EXCEPTION;
    b = JS_ToString(ctx, argv[0]);
    if (JS_IsException(b)) {
        JS_FreeValue(ctx, a);
        return JS_EXCEPTION;
    }
    cmp = js_string_compare(ctx, JS_VALUE_GET_STRING(a), JS_VALUE_GET_STRING(b));
    JS_FreeValue(ctx, a);
    JS_FreeValue(ctx, b);
    return JS_NewInt32(ctx, cmp);
}

static JSValue js_string_toLowerCase(JSContext *ctx, JSValueConst this_val,
                                     int argc, JSValueConst *argv, int to_lower)
{
    JSValue val;
    StringBuffer b_s, *b = &b_s;
    JSString *p;
    int i, c, j, l;
    uint32_t res[LRE_CC_RES_LEN_MAX];

    val = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(val))
        return val;
    p = JS_VALUE_GET_STRING(val);
    if (p->len == 0)
        return val;
    if (string_buffer_init(ctx, b, p->len))
        goto fail;
    for(i = 0; i < p->len;) {
        c = string_getc(p, &i);
        if (c == 0x3a3 && to_lower && test_final_sigma(p, i - 1)) {
            res[0] = 0x3c2; /* final sigma */
            l = 1;
        } else {
            l = lre_case_conv(res, c, to_lower);
        }
        for(j = 0; j < l; j++) {
            if (string_buffer_putc(b, res[j]))
                goto fail;
        }
    }
    JS_FreeValue(ctx, val);
    return string_buffer_end(b);
 fail:
    JS_FreeValue(ctx, val);
    string_buffer_free(b);
    return JS_EXCEPTION;
}

#ifdef CONFIG_ALL_UNICODE

/* return (-1, NULL) if exception, otherwise (len, buf) */
static int JS_ToUTF32String(JSContext *ctx, uint32_t **pbuf, JSValueConst val1)
{
    JSValue val;
    JSString *p;
    uint32_t *buf;
    int i, j, len;

    val = JS_ToString(ctx, val1);
    if (JS_IsException(val))
        return -1;
    p = JS_VALUE_GET_STRING(val);
    len = p->len;
    /* UTF32 buffer length is len minus the number of correct surrogates pairs */
    buf = (uint32_t*) js_malloc(ctx, sizeof(buf[0]) * max_int(len, 1));
    if (!buf) {
        JS_FreeValue(ctx, val);
        goto fail;
    }
    for(i = j = 0; i < len;)
        buf[j++] = string_getc(p, &i);
    JS_FreeValue(ctx, val);
    *pbuf = buf;
    return j;
 fail:
    *pbuf = NULL;
    return -1;
}

static JSValue JS_NewUTF32String(JSContext *ctx, const uint32_t *buf, int len)
{
    int i;
    StringBuffer b_s, *b = &b_s;
    if (string_buffer_init(ctx, b, len))
        return JS_EXCEPTION;
    for(i = 0; i < len; i++) {
        if (string_buffer_putc(b, buf[i]))
            goto fail;
    }
    return string_buffer_end(b);
 fail:
    string_buffer_free(b);
    return JS_EXCEPTION;
}

static JSValue js_string_normalize(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    const char *form, *p;
    size_t form_len;
    int is_compat, buf_len, out_len;
    UnicodeNormalizationEnum n_type;
    JSValue val;
    uint32_t *buf, *out_buf;

    val = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(val))
        return val;
    buf_len = JS_ToUTF32String(ctx, &buf, val);
    JS_FreeValue(ctx, val);
    if (buf_len < 0)
        return JS_EXCEPTION;

    if (argc == 0 || JS_IsUndefined(argv[0])) {
        n_type = UNICODE_NFC;
    } else {
        form = JS_ToCStringLen(ctx, &form_len, argv[0]);
        if (!form)
            goto fail1;
        p = form;
        if (p[0] != 'N' || p[1] != 'F')
            goto bad_form;
        p += 2;
        is_compat = FALSE;
        if (*p == 'K') {
            is_compat = TRUE;
            p++;
        }
        if (*p == 'C' || *p == 'D') {
            n_type = (UnicodeNormalizationEnum) (UNICODE_NFC + is_compat * 2 + (*p - 'C'));
            if ((p + 1 - form) != form_len)
                goto bad_form;
        } else {
        bad_form:
            JS_FreeCString(ctx, form);
            JS_ThrowRangeError(ctx, "bad normalization form");
        fail1:
            js_free(ctx, buf);
            return JS_EXCEPTION;
        }
        JS_FreeCString(ctx, form);
    }

    out_len = unicode_normalize(&out_buf, buf, buf_len, n_type,
                                ctx->rt, (DynBufReallocFunc *)js_realloc_rt);
    js_free(ctx, buf);
    if (out_len < 0)
        return JS_EXCEPTION;
    val = JS_NewUTF32String(ctx, out_buf, out_len);
    js_free(ctx, out_buf);
    return val;
}
#endif /* CONFIG_ALL_UNICODE */

/* also used for String.prototype.valueOf */
static JSValue js_string_toString(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    return js_thisStringValue(ctx, this_val);
}

#if 0
static JSValue js_string___toStringCheckObject(JSContext *ctx, JSValueConst this_val,
                                               int argc, JSValueConst *argv)
{
    return JS_ToStringCheckObject(ctx, argv[0]);
}

static JSValue js_string___toString(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    return JS_ToString(ctx, argv[0]);
}

static JSValue js_string___advanceStringIndex(JSContext *ctx, JSValueConst
                                              this_val,
                                              int argc, JSValueConst *argv)
{
    JSValue str;
    int idx;
    BOOL is_unicode;
    JSString *p;

    str = JS_ToString(ctx, argv[0]);
    if (JS_IsException(str))
        return str;
    if (JS_ToInt32Sat(ctx, &idx, argv[1])) {
        JS_FreeValue(ctx, str);
        return JS_EXCEPTION;
    }
    is_unicode = JS_ToBool(ctx, argv[2]);
    p = JS_VALUE_GET_STRING(str);
    if (!is_unicode || (unsigned)idx >= p->len || !p->is_wide_char) {
        idx++;
    } else {
        string_getc(p, &idx);
    }
    JS_FreeValue(ctx, str);
    return JS_NewInt32(ctx, idx);
}
#endif

/* String Iterator */

static JSValue js_string_iterator_next(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv,
                                       BOOL *pdone, int magic)
{
    JSArrayIteratorData *it;
    uint32_t idx, c, start;
    JSString *p;

    it = (JSArrayIteratorData*) JS_GetOpaque2(ctx, this_val, JS_CLASS_STRING_ITERATOR);
    if (!it) {
        *pdone = FALSE;
        return JS_EXCEPTION;
    }
    if (JS_IsUndefined(it->obj))
        goto done;
    p = JS_VALUE_GET_STRING(it->obj);
    idx = it->idx;
    if (idx >= p->len) {
        JS_FreeValue(ctx, it->obj);
        it->obj = JS_UNDEFINED;
    done:
        *pdone = TRUE;
        return JS_UNDEFINED;
    }

    start = idx;
    c = string_getc(p, (int *)&idx);
    it->idx = idx;
    *pdone = FALSE;
    if (c <= 0xffff) {
        return js_new_string_char(ctx, c);
    } else {
        return js_new_string16(ctx, p->u.str16 + start, 2);
    }
}

/* ES6 Annex B 2.3.2 etc. */
enum {
    magic_string_anchor,
    magic_string_big,
    magic_string_blink,
    magic_string_bold,
    magic_string_fixed,
    magic_string_fontcolor,
    magic_string_fontsize,
    magic_string_italics,
    magic_string_link,
    magic_string_small,
    magic_string_strike,
    magic_string_sub,
    magic_string_sup,
};

static JSValue js_string_CreateHTML(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv, int magic)
{
    JSValue str;
    const JSString *p;
    StringBuffer b_s, *b = &b_s;
    static struct { const char *tag, *attr; } const defs[] = {
        { "a", "name" }, { "big", NULL }, { "blink", NULL }, { "b", NULL },
        { "tt", NULL }, { "font", "color" }, { "font", "size" }, { "i", NULL },
        { "a", "href" }, { "small", NULL }, { "strike", NULL },
        { "sub", NULL }, { "sup", NULL },
    };

    str = JS_ToStringCheckObject(ctx, this_val);
    if (JS_IsException(str))
        return JS_EXCEPTION;
    string_buffer_init(ctx, b, 7);
    string_buffer_putc8(b, '<');
    string_buffer_puts8(b, defs[magic].tag);
    if (defs[magic].attr) {
        // r += " " + attr + "=\"" + value + "\"";
        JSValue value;
        int i;

        string_buffer_putc8(b, ' ');
        string_buffer_puts8(b, defs[magic].attr);
        string_buffer_puts8(b, "=\"");
        value = JS_ToStringCheckObject(ctx, argv[0]);
        if (JS_IsException(value)) {
            JS_FreeValue(ctx, str);
            string_buffer_free(b);
            return JS_EXCEPTION;
        }
        p = JS_VALUE_GET_STRING(value);
        for (i = 0; i < p->len; i++) {
            int c = string_get(p, i);
            if (c == '"') {
                string_buffer_puts8(b, "&quot;");
            } else {
                string_buffer_putc16(b, c);
            }
        }
        JS_FreeValue(ctx, value);
        string_buffer_putc8(b, '\"');
    }
    // return r + ">" + str + "</" + tag + ">";
    string_buffer_putc8(b, '>');
    string_buffer_concat_value_free(b, str);
    string_buffer_puts8(b, "</");
    string_buffer_puts8(b, defs[magic].tag);
    string_buffer_putc8(b, '>');
    return string_buffer_end(b);
}

static const JSCFunctionListEntry js_string_funcs[] = {
    JS_CFUNC_DEF("fromCharCode", 1, js_string_fromCharCode ),
    JS_CFUNC_DEF("fromCodePoint", 1, js_string_fromCodePoint ),
    JS_CFUNC_DEF("raw", 1, js_string_raw ),
    //JS_CFUNC_DEF("__toString", 1, js_string___toString ),
    //JS_CFUNC_DEF("__isSpace", 1, js_string___isSpace ),
    //JS_CFUNC_DEF("__toStringCheckObject", 1, js_string___toStringCheckObject ),
    //JS_CFUNC_DEF("__advanceStringIndex", 3, js_string___advanceStringIndex ),
    //JS_CFUNC_DEF("__GetSubstitution", 6, js_string___GetSubstitution ),
};

static const JSCFunctionListEntry js_string_proto_funcs[] = {
    JS_PROP_INT32_DEF("length", 0, JS_PROP_CONFIGURABLE ),
    JS_CFUNC_DEF("charCodeAt", 1, js_string_charCodeAt ),
    JS_CFUNC_DEF("charAt", 1, js_string_charAt ),
    JS_CFUNC_DEF("concat", 1, js_string_concat ),
    JS_CFUNC_DEF("codePointAt", 1, js_string_codePointAt ),
    JS_CFUNC_MAGIC_DEF("indexOf", 1, js_string_indexOf, 0 ),
    JS_CFUNC_MAGIC_DEF("lastIndexOf", 1, js_string_indexOf, 1 ),
    JS_CFUNC_MAGIC_DEF("includes", 1, js_string_includes, 0 ),
    JS_CFUNC_MAGIC_DEF("endsWith", 1, js_string_includes, 2 ),
    JS_CFUNC_MAGIC_DEF("startsWith", 1, js_string_includes, 1 ),
    JS_CFUNC_MAGIC_DEF("match", 1, js_string_match, JS_ATOM_Symbol_match ),
    JS_CFUNC_MAGIC_DEF("matchAll", 1, js_string_match, JS_ATOM_Symbol_matchAll ),
    JS_CFUNC_MAGIC_DEF("search", 1, js_string_match, JS_ATOM_Symbol_search ),
    JS_CFUNC_DEF("split", 2, js_string_split ),
    JS_CFUNC_DEF("substring", 2, js_string_substring ),
    JS_CFUNC_DEF("substr", 2, js_string_substr ),
    JS_CFUNC_DEF("slice", 2, js_string_slice ),
    JS_CFUNC_DEF("repeat", 1, js_string_repeat ),
    JS_CFUNC_MAGIC_DEF("replace", 2, js_string_replace, 0 ),
    JS_CFUNC_MAGIC_DEF("replaceAll", 2, js_string_replace, 1 ),
    JS_CFUNC_MAGIC_DEF("padEnd", 1, js_string_pad, 1 ),
    JS_CFUNC_MAGIC_DEF("padStart", 1, js_string_pad, 0 ),
    JS_CFUNC_MAGIC_DEF("trim", 0, js_string_trim, 3 ),
    JS_CFUNC_MAGIC_DEF("trimEnd", 0, js_string_trim, 2 ),
    JS_ALIAS_DEF("trimRight", "trimEnd" ),
    JS_CFUNC_MAGIC_DEF("trimStart", 0, js_string_trim, 1 ),
    JS_ALIAS_DEF("trimLeft", "trimStart" ),
    JS_CFUNC_DEF("toString", 0, js_string_toString ),
    JS_CFUNC_DEF("valueOf", 0, js_string_toString ),
    JS_CFUNC_DEF("__quote", 1, js_string___quote ),
    JS_CFUNC_DEF("localeCompare", 1, js_string_localeCompare ),
    JS_CFUNC_MAGIC_DEF("toLowerCase", 0, js_string_toLowerCase, 1 ),
    JS_CFUNC_MAGIC_DEF("toUpperCase", 0, js_string_toLowerCase, 0 ),
    JS_CFUNC_MAGIC_DEF("toLocaleLowerCase", 0, js_string_toLowerCase, 1 ),
    JS_CFUNC_MAGIC_DEF("toLocaleUpperCase", 0, js_string_toLowerCase, 0 ),
    JS_CFUNC_MAGIC_DEF("[Symbol.iterator]", 0, js_create_array_iterator, JS_ITERATOR_KIND_VALUE | 4 ),
    /* ES6 Annex B 2.3.2 etc. */
    JS_CFUNC_MAGIC_DEF("anchor", 1, js_string_CreateHTML, magic_string_anchor ),
    JS_CFUNC_MAGIC_DEF("big", 0, js_string_CreateHTML, magic_string_big ),
    JS_CFUNC_MAGIC_DEF("blink", 0, js_string_CreateHTML, magic_string_blink ),
    JS_CFUNC_MAGIC_DEF("bold", 0, js_string_CreateHTML, magic_string_bold ),
    JS_CFUNC_MAGIC_DEF("fixed", 0, js_string_CreateHTML, magic_string_fixed ),
    JS_CFUNC_MAGIC_DEF("fontcolor", 1, js_string_CreateHTML, magic_string_fontcolor ),
    JS_CFUNC_MAGIC_DEF("fontsize", 1, js_string_CreateHTML, magic_string_fontsize ),
    JS_CFUNC_MAGIC_DEF("italics", 0, js_string_CreateHTML, magic_string_italics ),
    JS_CFUNC_MAGIC_DEF("link", 1, js_string_CreateHTML, magic_string_link ),
    JS_CFUNC_MAGIC_DEF("small", 0, js_string_CreateHTML, magic_string_small ),
    JS_CFUNC_MAGIC_DEF("strike", 0, js_string_CreateHTML, magic_string_strike ),
    JS_CFUNC_MAGIC_DEF("sub", 0, js_string_CreateHTML, magic_string_sub ),
    JS_CFUNC_MAGIC_DEF("sup", 0, js_string_CreateHTML, magic_string_sup ),
};

static const JSCFunctionListEntry js_string_iterator_proto_funcs[] = {
    JS_ITERATOR_NEXT_DEF("next", 0, js_string_iterator_next, 0 ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "String Iterator", JS_PROP_CONFIGURABLE ),
};

#ifdef CONFIG_ALL_UNICODE
static const JSCFunctionListEntry js_string_proto_normalize[] = {
    JS_CFUNC_DEF("normalize", 0, js_string_normalize ),
};
#endif

inline void JS_AddIntrinsicStringNormalize(JSContext *ctx)
{
#ifdef CONFIG_ALL_UNICODE
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_STRING], js_string_proto_normalize,
                               countof(js_string_proto_normalize));
#endif
}

/* Math */

/* precondition: a and b are not NaN */
static double js_fmin(double a, double b)
{
    if (a == 0 && b == 0) {
        JSFloat64Union a1, b1;
        a1.d = a;
        b1.d = b;
        a1.u64 |= b1.u64;
        return a1.d;
    } else {
        return fmin(a, b);
    }
}

/* precondition: a and b are not NaN */
static double js_fmax(double a, double b)
{
    if (a == 0 && b == 0) {
        JSFloat64Union a1, b1;
        a1.d = a;
        b1.d = b;
        a1.u64 &= b1.u64;
        return a1.d;
    } else {
        return fmax(a, b);
    }
}

static JSValue js_math_min_max(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv, int magic)
{
    BOOL is_max = magic;
    double r, a;
    int i;
    uint32_t tag;

    if (js_unlikely(argc == 0)) {
        return __JS_NewFloat64(ctx, is_max ? -std::numeric_limits<double>::infinity()
                                           : std::numeric_limits<double>::infinity());
    }

    tag = JS_VALUE_GET_TAG(argv[0]);
    if (tag == JS_TAG_INT) {
        int a1, r1 = JS_VALUE_GET_INT(argv[0]);
        for(i = 1; i < argc; i++) {
            tag = JS_VALUE_GET_TAG(argv[i]);
            if (tag != JS_TAG_INT) {
                r = r1;
                goto generic_case;
            }
            a1 = JS_VALUE_GET_INT(argv[i]);
            if (is_max)
                r1 = max_int(r1, a1);
            else
                r1 = min_int(r1, a1);

        }
        return JS_NewInt32(ctx, r1);
    } else {
        if (JS_ToFloat64(ctx, &r, argv[0]))
            return JS_EXCEPTION;
        i = 1;
    generic_case:
        while (i < argc) {
            if (JS_ToFloat64(ctx, &a, argv[i]))
                return JS_EXCEPTION;
            if (!isnan(r)) {
                if (isnan(a)) {
                    r = a;
                } else {
                    if (is_max)
                        r = js_fmax(r, a);
                    else
                        r = js_fmin(r, a);
                }
            }
            i++;
        }
        return JS_NewFloat64(ctx, r);
    }
}

static double js_math_sign(double a)
{
    if (isnan(a) || a == 0.0)
        return a;
    if (a < 0)
        return -1;
    else
        return 1;
}

static double js_math_round(double a)
{
    JSFloat64Union u;
    uint64_t frac_mask, one;
    unsigned int e, s;

    u.d = a;
    e = (u.u64 >> 52) & 0x7ff;
    if (e < 1023) {
        /* abs(a) < 1 */
        if (e == (1023 - 1) && u.u64 != 0xbfe0000000000000) {
            /* abs(a) > 0.5 or a = 0.5: return +/-1.0 */
            u.u64 = (u.u64 & ((uint64_t)1 << 63)) | ((uint64_t)1023 << 52);
        } else {
            /* return +/-0.0 */
            u.u64 &= (uint64_t)1 << 63;
        }
    } else if (e < (1023 + 52)) {
        s = u.u64 >> 63;
        one = (uint64_t)1 << (52 - (e - 1023));
        frac_mask = one - 1;
        u.u64 += (one >> 1) - s;
        u.u64 &= ~frac_mask; /* truncate to an integer */
    }
    /* otherwise: abs(a) >= 2^52, or NaN, +/-Infinity: no change */
    return u.d;
}

static JSValue js_math_hypot(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv)
{
    double r, a;
    int i;

    r = 0;
    if (argc > 0) {
        if (JS_ToFloat64(ctx, &r, argv[0]))
            return JS_EXCEPTION;
        if (argc == 1) {
            r = fabs(r);
        } else {
            /* use the built-in function to minimize precision loss */
            for (i = 1; i < argc; i++) {
                if (JS_ToFloat64(ctx, &a, argv[i]))
                    return JS_EXCEPTION;
                r = hypot(r, a);
            }
        }
    }
    return JS_NewFloat64(ctx, r);
}

static double js_math_fround(double a)
{
    return (float)a;
}

static JSValue js_math_imul(JSContext *ctx, JSValueConst this_val,
                            int argc, JSValueConst *argv)
{
    int a, b;

    if (JS_ToInt32(ctx, &a, argv[0]))
        return JS_EXCEPTION;
    if (JS_ToInt32(ctx, &b, argv[1]))
        return JS_EXCEPTION;
    /* purposely ignoring overflow */
    return JS_NewInt32(ctx, a * b);
}

static JSValue js_math_clz32(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv)
{
    uint32_t a, r;

    if (JS_ToUint32(ctx, &a, argv[0]))
        return JS_EXCEPTION;
    if (a == 0)
        r = 32;
    else
        r = clz32(a);
    return JS_NewInt32(ctx, r);
}

/* xorshift* random number generator by Marsaglia */
static uint64_t xorshift64star(uint64_t *pstate)
{
    uint64_t x;
    x = *pstate;
    x ^= x >> 12;
    x ^= x << 25;
    x ^= x >> 27;
    *pstate = x;
    return x * 0x2545F4914F6CDD1D;
}

#if _MSC_VER
struct timeval
{
    long tv_sec, tv_usec;
};

static int gettimeofday (struct timeval* tp, struct timezone * tzp)
{
    SYSTEMTIME sysTime;
    GetSystemTime (&sysTime);

    FILETIME fileTime;
    SystemTimeToFileTime (&sysTime, &fileTime);

    auto t = static_cast<uint64_t> (fileTime.dwLowDateTime)
               + (static_cast<uint64_t> (fileTime.dwHighDateTime) << 32);

    tp->tv_sec  = static_cast<long> ((t - 116444736000000000ull) / 10000000u);
    tp->tv_usec = static_cast<long> (sysTime.wMilliseconds * 1000);

    return 0;
}
#endif

static void js_random_init(JSContext *ctx)
{
    struct timeval tv;
    gettimeofday(&tv, NULL);
    ctx->random_state = ((int64_t)tv.tv_sec * 1000000) + tv.tv_usec;
    /* the state must be non zero */
    if (ctx->random_state == 0)
        ctx->random_state = 1;
}

static JSValue js_math_random(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv)
{
    JSFloat64Union u;
    uint64_t v;

    v = xorshift64star(&ctx->random_state);
    /* 1.0 <= u.d < 2 */
    u.u64 = ((uint64_t)0x3ff << 52) | (v >> 12);
    return __JS_NewFloat64(ctx, u.d - 1.0);
}

static const JSCFunctionListEntry js_math_funcs[] = {
    JS_CFUNC_MAGIC_DEF("min", 2, js_math_min_max, 0 ),
    JS_CFUNC_MAGIC_DEF("max", 2, js_math_min_max, 1 ),
    JS_CFUNC_SPECIAL_DEF("abs", 1, f_f, fabs ),
    JS_CFUNC_SPECIAL_DEF("floor", 1, f_f, floor ),
    JS_CFUNC_SPECIAL_DEF("ceil", 1, f_f, ceil ),
    JS_CFUNC_SPECIAL_DEF("round", 1, f_f, js_math_round ),
    JS_CFUNC_SPECIAL_DEF("sqrt", 1, f_f, sqrt ),

    JS_CFUNC_SPECIAL_DEF("acos", 1, f_f, acos ),
    JS_CFUNC_SPECIAL_DEF("asin", 1, f_f, asin ),
    JS_CFUNC_SPECIAL_DEF("atan", 1, f_f, atan ),
    JS_CFUNC_SPECIAL_DEF("atan2", 2, f_f_f, atan2 ),
    JS_CFUNC_SPECIAL_DEF("cos", 1, f_f, cos ),
    JS_CFUNC_SPECIAL_DEF("exp", 1, f_f, exp ),
    JS_CFUNC_SPECIAL_DEF("log", 1, f_f, log ),
    JS_CFUNC_SPECIAL_DEF("pow", 2, f_f_f, js_pow ),
    JS_CFUNC_SPECIAL_DEF("sin", 1, f_f, sin ),
    JS_CFUNC_SPECIAL_DEF("tan", 1, f_f, tan ),
    /* ES6 */
    JS_CFUNC_SPECIAL_DEF("trunc", 1, f_f, trunc ),
    JS_CFUNC_SPECIAL_DEF("sign", 1, f_f, js_math_sign ),
    JS_CFUNC_SPECIAL_DEF("cosh", 1, f_f, cosh ),
    JS_CFUNC_SPECIAL_DEF("sinh", 1, f_f, sinh ),
    JS_CFUNC_SPECIAL_DEF("tanh", 1, f_f, tanh ),
    JS_CFUNC_SPECIAL_DEF("acosh", 1, f_f, acosh ),
    JS_CFUNC_SPECIAL_DEF("asinh", 1, f_f, asinh ),
    JS_CFUNC_SPECIAL_DEF("atanh", 1, f_f, atanh ),
    JS_CFUNC_SPECIAL_DEF("expm1", 1, f_f, expm1 ),
    JS_CFUNC_SPECIAL_DEF("log1p", 1, f_f, log1p ),
    JS_CFUNC_SPECIAL_DEF("log2", 1, f_f, log2 ),
    JS_CFUNC_SPECIAL_DEF("log10", 1, f_f, log10 ),
    JS_CFUNC_SPECIAL_DEF("cbrt", 1, f_f, cbrt ),
    JS_CFUNC_DEF("hypot", 2, js_math_hypot ),
    JS_CFUNC_DEF("random", 0, js_math_random ),
    JS_CFUNC_SPECIAL_DEF("fround", 1, f_f, js_math_fround ),
    JS_CFUNC_DEF("imul", 2, js_math_imul ),
    JS_CFUNC_DEF("clz32", 1, js_math_clz32 ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "Math", JS_PROP_CONFIGURABLE ),
    JS_PROP_DOUBLE_DEF("E", 2.718281828459045, 0 ),
    JS_PROP_DOUBLE_DEF("LN10", 2.302585092994046, 0 ),
    JS_PROP_DOUBLE_DEF("LN2", 0.6931471805599453, 0 ),
    JS_PROP_DOUBLE_DEF("LOG2E", 1.4426950408889634, 0 ),
    JS_PROP_DOUBLE_DEF("LOG10E", 0.4342944819032518, 0 ),
    JS_PROP_DOUBLE_DEF("PI", 3.141592653589793, 0 ),
    JS_PROP_DOUBLE_DEF("SQRT1_2", 0.7071067811865476, 0 ),
    JS_PROP_DOUBLE_DEF("SQRT2", 1.4142135623730951, 0 ),
};

static const JSCFunctionListEntry js_math_obj[] = {
    JS_OBJECT_DEF("Math", js_math_funcs, countof(js_math_funcs), JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE ),
};

/* Date */

#if 0
/* OS dependent: return the UTC time in ms since 1970. */
static JSValue js___date_now(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv)
{
    int64_t d;
    struct timeval tv;
    gettimeofday(&tv, NULL);
    d = (int64_t)tv.tv_sec * 1000 + (tv.tv_usec / 1000);
    return JS_NewInt64(ctx, d);
}
#endif

/* OS dependent: return the UTC time in microseconds since 1970. */
static JSValue js___date_clock(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv)
{
    int64_t d;
    struct timeval tv;
    gettimeofday(&tv, NULL);
    d = (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
    return JS_NewInt64(ctx, d);
}

/* OS dependent. d = argv[0] is in ms from 1970. Return the difference
   between UTC time and local time 'd' in minutes */
static int getTimezoneOffset(int64_t time) {
#if defined(_WIN32)
    /* XXX: TODO */
    return 0;
#else
    time_t ti;
    struct tm tm;

    time /= 1000; /* convert to seconds */
    if (sizeof(time_t) == 4) {
        /* on 32-bit systems, we need to clamp the time value to the
           range of `time_t`. This is better than truncating values to
           32 bits and hopefully provides the same result as 64-bit
           implementation of localtime_r.
         */
        if ((time_t)-1 < 0) {
            if (time < INT32_MIN) {
                time = INT32_MIN;
            } else if (time > INT32_MAX) {
                time = INT32_MAX;
            }
        } else {
            if (time < 0) {
                time = 0;
            } else if (time > UINT32_MAX) {
                time = UINT32_MAX;
            }
        }
    }
    ti = time;
    localtime_r(&ti, &tm);
    return -tm.tm_gmtoff / 60;
#endif
}

#if 0
static JSValue js___date_getTimezoneOffset(JSContext *ctx, JSValueConst this_val,
                                           int argc, JSValueConst *argv)
{
    double dd;

    if (JS_ToFloat64(ctx, &dd, argv[0]))
        return JS_EXCEPTION;
    if (isnan(dd))
        return __JS_NewFloat64(ctx, dd);
    else
        return JS_NewInt32(ctx, getTimezoneOffset((int64_t)dd));
}

static JSValue js_get_prototype_from_ctor(JSContext *ctx, JSValueConst ctor,
                                          JSValueConst def_proto)
{
    JSValue proto;
    proto = JS_GetProperty(ctx, ctor, JS_ATOM_prototype);
    if (JS_IsException(proto))
        return proto;
    if (!JS_IsObject(proto)) {
        JS_FreeValue(ctx, proto);
        proto = JS_DupValue(ctx, def_proto);
    }
    return proto;
}

/* create a new date object */
static JSValue js___date_create(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSValue obj, proto;
    proto = js_get_prototype_from_ctor(ctx, argv[0], argv[1]);
    if (JS_IsException(proto))
        return proto;
    obj = JS_NewObjectProtoClass(ctx, proto, JS_CLASS_DATE);
    JS_FreeValue(ctx, proto);
    if (!JS_IsException(obj))
        JS_SetObjectData(ctx, obj, JS_DupValue(ctx, argv[2]));
    return obj;
}
#endif

/* RegExp */

static void js_regexp_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSRegExp *re = &p->u.regexp;
    JS_FreeValueRT(rt, JS_MKPTR(JS_TAG_STRING, re->bytecode));
    JS_FreeValueRT(rt, JS_MKPTR(JS_TAG_STRING, re->pattern));
}

/* create a string containing the RegExp bytecode */
static JSValue js_compile_regexp(JSContext *ctx, JSValueConst pattern,
                                 JSValueConst flags)
{
    const char *str;
    int re_flags, mask;
    uint8_t *re_bytecode_buf;
    size_t i, len;
    int re_bytecode_len;
    JSValue ret;
    char error_msg[64];

    re_flags = 0;
    if (!JS_IsUndefined(flags)) {
        str = JS_ToCStringLen(ctx, &len, flags);
        if (!str)
            return JS_EXCEPTION;
        /* XXX: re_flags = LRE_FLAG_OCTAL unless strict mode? */
        for (i = 0; i < len; i++) {
            switch(str[i]) {
            case 'g':
                mask = LRE_FLAG_GLOBAL;
                break;
            case 'i':
                mask = LRE_FLAG_IGNORECASE;
                break;
            case 'm':
                mask = LRE_FLAG_MULTILINE;
                break;
            case 's':
                mask = LRE_FLAG_DOTALL;
                break;
            case 'u':
                mask = LRE_FLAG_UTF16;
                break;
            case 'y':
                mask = LRE_FLAG_STICKY;
                break;
            default:
                goto bad_flags;
            }
            if ((re_flags & mask) != 0) {
            bad_flags:
                JS_FreeCString(ctx, str);
                return JS_ThrowSyntaxError(ctx, "invalid regular expression flags");
            }
            re_flags |= mask;
        }
        JS_FreeCString(ctx, str);
    }

    str = JS_ToCStringLen2(ctx, &len, pattern, !(re_flags & LRE_FLAG_UTF16));
    if (!str)
        return JS_EXCEPTION;
    re_bytecode_buf = lre_compile(&re_bytecode_len, error_msg,
                                  sizeof(error_msg), str, len, re_flags, ctx);
    JS_FreeCString(ctx, str);
    if (!re_bytecode_buf) {
        JS_ThrowSyntaxError(ctx, "%s", error_msg);
        return JS_EXCEPTION;
    }

    ret = js_new_string8(ctx, re_bytecode_buf, re_bytecode_len);
    js_free(ctx, re_bytecode_buf);
    return ret;
}

/* create a RegExp object from a string containing the RegExp bytecode
   and the source pattern */
static JSValue js_regexp_constructor_internal(JSContext *ctx, JSValueConst ctor,
                                              JSValue pattern, JSValue bc)
{
    JSValue obj;
    JSObject *p;
    JSRegExp *re;

    /* sanity check */
    if (JS_VALUE_GET_TAG(bc) != JS_TAG_STRING ||
        JS_VALUE_GET_TAG(pattern) != JS_TAG_STRING) {
        JS_ThrowTypeError(ctx, "string expected");
    fail:
        JS_FreeValue(ctx, bc);
        JS_FreeValue(ctx, pattern);
        return JS_EXCEPTION;
    }

    obj = js_create_from_ctor(ctx, ctor, JS_CLASS_REGEXP);
    if (JS_IsException(obj))
        goto fail;
    p = JS_VALUE_GET_OBJ(obj);
    re = &p->u.regexp;
    re->pattern = JS_VALUE_GET_STRING(pattern);
    re->bytecode = JS_VALUE_GET_STRING(bc);
    JS_DefinePropertyValue(ctx, obj, JS_ATOM_lastIndex, JS_NewInt32(ctx, 0),
                           JS_PROP_WRITABLE);
    return obj;
}

static JSRegExp *js_get_regexp(JSContext *ctx, JSValueConst obj, BOOL throw_error)
{
    if (JS_VALUE_GET_TAG(obj) == JS_TAG_OBJECT) {
        JSObject *p = JS_VALUE_GET_OBJ(obj);
        if (p->class_id == JS_CLASS_REGEXP)
            return &p->u.regexp;
    }
    if (throw_error) {
        JS_ThrowTypeErrorInvalidClass(ctx, JS_CLASS_REGEXP);
    }
    return NULL;
}

/* return < 0 if exception or TRUE/FALSE */
static int js_is_regexp(JSContext *ctx, JSValueConst obj)
{
    JSValue m;

    if (!JS_IsObject(obj))
        return FALSE;
    m = JS_GetProperty(ctx, obj, JS_ATOM_Symbol_match);
    if (JS_IsException(m))
        return -1;
    if (!JS_IsUndefined(m))
        return JS_ToBoolFree(ctx, m);
    return js_get_regexp(ctx, obj, FALSE) != NULL;
}

static JSValue js_regexp_constructor(JSContext *ctx, JSValueConst new_target,
                                     int argc, JSValueConst *argv)
{
    JSValue pattern, flags, bc, val;
    JSValueConst pat, flags1;
    JSRegExp *re;
    int pat_is_regexp;

    pat = argv[0];
    flags1 = argv[1];
    pat_is_regexp = js_is_regexp(ctx, pat);
    if (pat_is_regexp < 0)
        return JS_EXCEPTION;
    if (JS_IsUndefined(new_target)) {
        /* called as a function */
        new_target = JS_GetActiveFunction(ctx);
        if (pat_is_regexp && JS_IsUndefined(flags1)) {
            JSValue ctor;
            BOOL res;
            ctor = JS_GetProperty(ctx, pat, JS_ATOM_constructor);
            if (JS_IsException(ctor))
                return ctor;
            res = js_same_value(ctx, ctor, new_target);
            JS_FreeValue(ctx, ctor);
            if (res)
                return JS_DupValue(ctx, pat);
        }
    }
    re = js_get_regexp(ctx, pat, FALSE);
    if (re) {
        pattern = JS_DupValue(ctx, JS_MKPTR(JS_TAG_STRING, re->pattern));
        if (JS_IsUndefined(flags1)) {
            bc = JS_DupValue(ctx, JS_MKPTR(JS_TAG_STRING, re->bytecode));
            goto no_compilation;
        } else {
            flags = JS_ToString(ctx, flags1);
            if (JS_IsException(flags))
                goto fail;
        }
    } else {
        flags = JS_UNDEFINED;
        if (pat_is_regexp) {
            pattern = JS_GetProperty(ctx, pat, JS_ATOM_source);
            if (JS_IsException(pattern))
                goto fail;
            if (JS_IsUndefined(flags1)) {
                flags = JS_GetProperty(ctx, pat, JS_ATOM_flags);
                if (JS_IsException(flags))
                    goto fail;
            } else {
                flags = JS_DupValue(ctx, flags1);
            }
        } else {
            pattern = JS_DupValue(ctx, pat);
            flags = JS_DupValue(ctx, flags1);
        }
        if (JS_IsUndefined(pattern)) {
            pattern = JS_AtomToString(ctx, JS_ATOM_empty_string);
        } else {
            val = pattern;
            pattern = JS_ToString(ctx, val);
            JS_FreeValue(ctx, val);
            if (JS_IsException(pattern))
                goto fail;
        }
    }
    bc = js_compile_regexp(ctx, pattern, flags);
    if (JS_IsException(bc))
        goto fail;
    JS_FreeValue(ctx, flags);
 no_compilation:
    return js_regexp_constructor_internal(ctx, new_target, pattern, bc);
 fail:
    JS_FreeValue(ctx, pattern);
    JS_FreeValue(ctx, flags);
    return JS_EXCEPTION;
}

static JSValue js_regexp_compile(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    JSRegExp *re1, *re;
    JSValueConst pattern1, flags1;
    JSValue bc, pattern;

    re = js_get_regexp(ctx, this_val, TRUE);
    if (!re)
        return JS_EXCEPTION;
    pattern1 = argv[0];
    flags1 = argv[1];
    re1 = js_get_regexp(ctx, pattern1, FALSE);
    if (re1) {
        if (!JS_IsUndefined(flags1))
            return JS_ThrowTypeError(ctx, "flags must be undefined");
        pattern = JS_DupValue(ctx, JS_MKPTR(JS_TAG_STRING, re1->pattern));
        bc = JS_DupValue(ctx, JS_MKPTR(JS_TAG_STRING, re1->bytecode));
    } else {
        bc = JS_UNDEFINED;
        if (JS_IsUndefined(pattern1))
            pattern = JS_AtomToString(ctx, JS_ATOM_empty_string);
        else
            pattern = JS_ToString(ctx, pattern1);
        if (JS_IsException(pattern))
            goto fail;
        bc = js_compile_regexp(ctx, pattern, flags1);
        if (JS_IsException(bc))
            goto fail;
    }
    JS_FreeValue(ctx, JS_MKPTR(JS_TAG_STRING, re->pattern));
    JS_FreeValue(ctx, JS_MKPTR(JS_TAG_STRING, re->bytecode));
    re->pattern = JS_VALUE_GET_STRING(pattern);
    re->bytecode = JS_VALUE_GET_STRING(bc);
    if (JS_SetProperty(ctx, this_val, JS_ATOM_lastIndex,
                       JS_NewInt32(ctx, 0)) < 0)
        return JS_EXCEPTION;
    return JS_DupValue(ctx, this_val);
 fail:
    JS_FreeValue(ctx, pattern);
    JS_FreeValue(ctx, bc);
    return JS_EXCEPTION;
}

#if 0
static JSValue js_regexp_get___source(JSContext *ctx, JSValueConst this_val)
{
    JSRegExp *re = js_get_regexp(ctx, this_val, TRUE);
    if (!re)
        return JS_EXCEPTION;
    return JS_DupValue(ctx, JS_MKPTR(JS_TAG_STRING, re->pattern));
}

static JSValue js_regexp_get___flags(JSContext *ctx, JSValueConst this_val)
{
    JSRegExp *re = js_get_regexp(ctx, this_val, TRUE);
    int flags;

    if (!re)
        return JS_EXCEPTION;
    flags = lre_get_flags(re->bytecode->u.str8);
    return JS_NewInt32(ctx, flags);
}
#endif

static JSValue js_regexp_get_source(JSContext *ctx, JSValueConst this_val)
{
    JSRegExp *re;
    JSString *p;
    StringBuffer b_s, *b = &b_s;
    int i, n, c, c2, bra;

    if (JS_VALUE_GET_TAG(this_val) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);

    if (js_same_value(ctx, this_val, ctx->class_proto[JS_CLASS_REGEXP]))
        goto empty_regex;

    re = js_get_regexp(ctx, this_val, TRUE);
    if (!re)
        return JS_EXCEPTION;

    p = re->pattern;

    if (p->len == 0) {
    empty_regex:
        return JS_NewString(ctx, "(?:)");
    }
    string_buffer_init2(ctx, b, p->len, p->is_wide_char);

    /* Escape '/' and newline sequences as needed */
    bra = 0;
    for (i = 0, n = p->len; i < n;) {
        c2 = -1;
        switch (c = string_get(p, i++)) {
        case '\\':
            if (i < n)
                c2 = string_get(p, i++);
            break;
        case ']':
            bra = 0;
            break;
        case '[':
            if (!bra) {
                if (i < n && string_get(p, i) == ']')
                    c2 = string_get(p, i++);
                bra = 1;
            }
            break;
        case '\n':
            c = '\\';
            c2 = 'n';
            break;
        case '\r':
            c = '\\';
            c2 = 'r';
            break;
        case '/':
            if (!bra) {
                c = '\\';
                c2 = '/';
            }
            break;
        }
        string_buffer_putc16(b, c);
        if (c2 >= 0)
            string_buffer_putc16(b, c2);
    }
    return string_buffer_end(b);
}

static JSValue js_regexp_get_flag(JSContext *ctx, JSValueConst this_val, int mask)
{
    JSRegExp *re;
    int flags;

    if (JS_VALUE_GET_TAG(this_val) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);

    re = js_get_regexp(ctx, this_val, FALSE);
    if (!re) {
        if (js_same_value(ctx, this_val, ctx->class_proto[JS_CLASS_REGEXP]))
            return JS_UNDEFINED;
        else
            return JS_ThrowTypeErrorInvalidClass(ctx, JS_CLASS_REGEXP);
    }

    flags = lre_get_flags(re->bytecode->u.str8);
    return JS_NewBool(ctx, (flags & mask) != 0);
}

static JSValue js_regexp_get_flags(JSContext *ctx, JSValueConst this_val)
{
    char str[8], *p = str;
    int res;

    if (JS_VALUE_GET_TAG(this_val) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);

    res = JS_ToBoolFree(ctx, JS_GetProperty(ctx, this_val, JS_ATOM_global));
    if (res < 0)
        goto exception;
    if (res)
        *p++ = 'g';
    res = JS_ToBoolFree(ctx, JS_GetPropertyStr(ctx, this_val, "ignoreCase"));
    if (res < 0)
        goto exception;
    if (res)
        *p++ = 'i';
    res = JS_ToBoolFree(ctx, JS_GetPropertyStr(ctx, this_val, "multiline"));
    if (res < 0)
        goto exception;
    if (res)
        *p++ = 'm';
    res = JS_ToBoolFree(ctx, JS_GetPropertyStr(ctx, this_val, "dotAll"));
    if (res < 0)
        goto exception;
    if (res)
        *p++ = 's';
    res = JS_ToBoolFree(ctx, JS_GetProperty(ctx, this_val, JS_ATOM_unicode));
    if (res < 0)
        goto exception;
    if (res)
        *p++ = 'u';
    res = JS_ToBoolFree(ctx, JS_GetPropertyStr(ctx, this_val, "sticky"));
    if (res < 0)
        goto exception;
    if (res)
        *p++ = 'y';
    return JS_NewStringLen(ctx, str, p - str);

exception:
    return JS_EXCEPTION;
}

static JSValue js_regexp_toString(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    JSValue pattern, flags;
    StringBuffer b_s, *b = &b_s;

    if (!JS_IsObject(this_val))
        return JS_ThrowTypeErrorNotAnObject(ctx);

    string_buffer_init(ctx, b, 0);
    string_buffer_putc8(b, '/');
    pattern = JS_GetProperty(ctx, this_val, JS_ATOM_source);
    if (string_buffer_concat_value_free(b, pattern))
        goto fail;
    string_buffer_putc8(b, '/');
    flags = JS_GetProperty(ctx, this_val, JS_ATOM_flags);
    if (string_buffer_concat_value_free(b, flags))
        goto fail;
    return string_buffer_end(b);

fail:
    string_buffer_free(b);
    return JS_EXCEPTION;
}

inline BOOL lre_check_stack_overflow(void *opaque, size_t alloca_size)
{
    auto ctx = (JSContext*) opaque;
    return js_check_stack_overflow(ctx->rt, alloca_size);
}

inline void *lre_realloc(void *opaque, void *ptr, size_t size)
{
    auto ctx = (JSContext*) opaque;
    /* No JS exception is raised here */
    return js_realloc_rt(ctx->rt, ptr, size);
}

static JSValue js_regexp_exec(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv)
{
    JSRegExp *re = js_get_regexp(ctx, this_val, TRUE);
    JSString *str;
    JSValue str_val, obj, val, groups = JS_UNDEFINED;
    uint8_t *re_bytecode;
    int ret;
    uint8_t **capture, *str_buf;
    int capture_count, shift, i, re_flags;
    int64_t last_index;
    const char *group_name_ptr;

    if (!re)
        return JS_EXCEPTION;
    str_val = JS_ToString(ctx, argv[0]);
    if (JS_IsException(str_val))
        return str_val;
    val = JS_GetProperty(ctx, this_val, JS_ATOM_lastIndex);
    if (JS_IsException(val) ||
        JS_ToLengthFree(ctx, &last_index, val)) {
        JS_FreeValue(ctx, str_val);
        return JS_EXCEPTION;
    }
    re_bytecode = re->bytecode->u.str8;
    re_flags = lre_get_flags(re_bytecode);
    if ((re_flags & (LRE_FLAG_GLOBAL | LRE_FLAG_STICKY)) == 0) {
        last_index = 0;
    }
    str = JS_VALUE_GET_STRING(str_val);
    capture_count = lre_get_capture_count(re_bytecode);
    capture = NULL;
    if (capture_count > 0) {
        capture = (uint8_t**) js_malloc(ctx, sizeof(capture[0]) * capture_count * 2);
        if (!capture) {
            JS_FreeValue(ctx, str_val);
            return JS_EXCEPTION;
        }
    }
    shift = str->is_wide_char;
    str_buf = str->u.str8;
    if (last_index > str->len) {
        ret = 2;
    } else {
        ret = lre_exec(capture, re_bytecode,
                       str_buf, last_index, str->len,
                       shift, ctx);
    }
    obj = JS_NULL;
    if (ret != 1) {
        if (ret >= 0) {
            if (ret == 2 || (re_flags & (LRE_FLAG_GLOBAL | LRE_FLAG_STICKY))) {
                if (JS_SetProperty(ctx, this_val, JS_ATOM_lastIndex,
                                   JS_NewInt32(ctx, 0)) < 0)
                    goto fail;
            }
        } else {
            JS_ThrowInternalError(ctx, "out of memory in regexp execution");
            goto fail;
        }
        JS_FreeValue(ctx, str_val);
    } else {
        int prop_flags;
        if (re_flags & (LRE_FLAG_GLOBAL | LRE_FLAG_STICKY)) {
            if (JS_SetProperty(ctx, this_val, JS_ATOM_lastIndex,
                               JS_NewInt32(ctx, (capture[1] - str_buf) >> shift)) < 0)
                goto fail;
        }
        obj = JS_NewArray(ctx);
        if (JS_IsException(obj))
            goto fail;
        prop_flags = JS_PROP_C_W_E | JS_PROP_THROW;
        group_name_ptr = lre_get_groupnames(re_bytecode);
        if (group_name_ptr) {
            groups = JS_NewObjectProto(ctx, JS_NULL);
            if (JS_IsException(groups))
                goto fail;
        }

        for(i = 0; i < capture_count; i++) {
            int start, end;
            JSValue val;
            if (capture[2 * i] == NULL ||
                capture[2 * i + 1] == NULL) {
                val = JS_UNDEFINED;
            } else {
                start = (capture[2 * i] - str_buf) >> shift;
                end = (capture[2 * i + 1] - str_buf) >> shift;
                val = js_sub_string(ctx, str, start, end);
                if (JS_IsException(val))
                    goto fail;
            }
            if (group_name_ptr && i > 0) {
                if (*group_name_ptr) {
                    if (JS_DefinePropertyValueStr(ctx, groups, group_name_ptr,
                                                  JS_DupValue(ctx, val),
                                                  prop_flags) < 0) {
                        JS_FreeValue(ctx, val);
                        goto fail;
                    }
                }
                group_name_ptr += strlen(group_name_ptr) + 1;
            }
            if (JS_DefinePropertyValueUint32(ctx, obj, i, val, prop_flags) < 0)
                goto fail;
        }
        if (JS_DefinePropertyValue(ctx, obj, JS_ATOM_groups,
                                   groups, prop_flags) < 0)
            goto fail;
        if (JS_DefinePropertyValue(ctx, obj, JS_ATOM_index,
                                   JS_NewInt32(ctx, (capture[0] - str_buf) >> shift), prop_flags) < 0)
            goto fail;
        if (JS_DefinePropertyValue(ctx, obj, JS_ATOM_input, str_val, prop_flags) < 0)
            goto fail1;
    }
    js_free(ctx, capture);
    return obj;
fail:
    JS_FreeValue(ctx, groups);
    JS_FreeValue(ctx, str_val);
fail1:
    JS_FreeValue(ctx, obj);
    js_free(ctx, capture);
    return JS_EXCEPTION;
}

/* delete portions of a string that match a given regex */
static JSValue JS_RegExpDelete(JSContext *ctx, JSValueConst this_val, JSValueConst arg)
{
    JSRegExp *re = js_get_regexp(ctx, this_val, TRUE);
    JSString *str;
    JSValue str_val, val;
    uint8_t *re_bytecode;
    int ret;
    uint8_t **capture, *str_buf;
    int capture_count, shift, re_flags;
    int next_src_pos, start, end;
    int64_t last_index;
    StringBuffer b_s, *b = &b_s;

    if (!re)
        return JS_EXCEPTION;

    string_buffer_init(ctx, b, 0);

    capture = NULL;
    str_val = JS_ToString(ctx, arg);
    if (JS_IsException(str_val))
        goto fail;
    str = JS_VALUE_GET_STRING(str_val);
    re_bytecode = re->bytecode->u.str8;
    re_flags = lre_get_flags(re_bytecode);
    if ((re_flags & (LRE_FLAG_GLOBAL | LRE_FLAG_STICKY)) == 0) {
        last_index = 0;
    } else {
        val = JS_GetProperty(ctx, this_val, JS_ATOM_lastIndex);
        if (JS_IsException(val) || JS_ToLengthFree(ctx, &last_index, val))
            goto fail;
    }
    capture_count = lre_get_capture_count(re_bytecode);
    if (capture_count > 0) {
        capture = (uint8_t**) js_malloc(ctx, sizeof(capture[0]) * capture_count * 2);
        if (!capture)
            goto fail;
    }
    shift = str->is_wide_char;
    str_buf = str->u.str8;
    next_src_pos = 0;
    for (;;) {
        if (last_index > str->len)
            break;

        ret = lre_exec(capture, re_bytecode,
                       str_buf, last_index, str->len, shift, ctx);
        if (ret != 1) {
            if (ret >= 0) {
                if (ret == 2 || (re_flags & (LRE_FLAG_GLOBAL | LRE_FLAG_STICKY))) {
                    if (JS_SetProperty(ctx, this_val, JS_ATOM_lastIndex,
                                       JS_NewInt32(ctx, 0)) < 0)
                        goto fail;
                }
            } else {
                JS_ThrowInternalError(ctx, "out of memory in regexp execution");
                goto fail;
            }
            break;
        }
        start = (capture[0] - str_buf) >> shift;
        end = (capture[1] - str_buf) >> shift;
        last_index = end;
        if (next_src_pos < start) {
            if (string_buffer_concat(b, str, next_src_pos, start))
                goto fail;
        }
        next_src_pos = end;
        if (!(re_flags & LRE_FLAG_GLOBAL)) {
            if (JS_SetProperty(ctx, this_val, JS_ATOM_lastIndex,
                               JS_NewInt32(ctx, end)) < 0)
                goto fail;
            break;
        }
        if (end == start) {
            if (!(re_flags & LRE_FLAG_UTF16) || (unsigned)end >= str->len || !str->is_wide_char) {
                end++;
            } else {
                string_getc(str, &end);
            }
        }
        last_index = end;
    }
    if (string_buffer_concat(b, str, next_src_pos, str->len))
        goto fail;
    JS_FreeValue(ctx, str_val);
    js_free(ctx, capture);
    return string_buffer_end(b);
fail:
    JS_FreeValue(ctx, str_val);
    js_free(ctx, capture);
    string_buffer_free(b);
    return JS_EXCEPTION;
}

static JSValue JS_RegExpExec(JSContext *ctx, JSValueConst r, JSValueConst s)
{
    JSValue method, ret;

    method = JS_GetProperty(ctx, r, JS_ATOM_exec);
    if (JS_IsException(method))
        return method;
    if (JS_IsFunction(ctx, method)) {
        ret = JS_CallFree(ctx, method, r, 1, &s);
        if (JS_IsException(ret))
            return ret;
        if (!JS_IsObject(ret) && !JS_IsNull(ret)) {
            JS_FreeValue(ctx, ret);
            return JS_ThrowTypeError(ctx, "RegExp exec method must return an object or null");
        }
        return ret;
    }
    JS_FreeValue(ctx, method);
    return js_regexp_exec(ctx, r, 1, &s);
}

#if 0
static JSValue js_regexp___RegExpExec(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv)
{
    return JS_RegExpExec(ctx, argv[0], argv[1]);
}
static JSValue js_regexp___RegExpDelete(JSContext *ctx, JSValueConst this_val,
                                        int argc, JSValueConst *argv)
{
    return JS_RegExpDelete(ctx, argv[0], argv[1]);
}
#endif

static JSValue js_regexp_test(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv)
{
    JSValue val;
    BOOL ret;

    val = JS_RegExpExec(ctx, this_val, argv[0]);
    if (JS_IsException(val))
        return JS_EXCEPTION;
    ret = !JS_IsNull(val);
    JS_FreeValue(ctx, val);
    return JS_NewBool(ctx, ret);
}

static JSValue js_regexp_Symbol_match(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv)
{
    // [Symbol.match](str)
    JSValueConst rx = this_val;
    JSValue A, S, result, matchStr;
    int global, n, fullUnicode, isEmpty;
    JSString *p;

    if (!JS_IsObject(rx))
        return JS_ThrowTypeErrorNotAnObject(ctx);

    A = JS_UNDEFINED;
    result = JS_UNDEFINED;
    matchStr = JS_UNDEFINED;
    S = JS_ToString(ctx, argv[0]);
    if (JS_IsException(S))
        goto exception;

    global = JS_ToBoolFree(ctx, JS_GetProperty(ctx, rx, JS_ATOM_global));
    if (global < 0)
        goto exception;

    if (!global) {
        A = JS_RegExpExec(ctx, rx, S);
    } else {
        fullUnicode = JS_ToBoolFree(ctx, JS_GetProperty(ctx, rx, JS_ATOM_unicode));
        if (fullUnicode < 0)
            goto exception;

        if (JS_SetProperty(ctx, rx, JS_ATOM_lastIndex, JS_NewInt32(ctx, 0)) < 0)
            goto exception;
        A = JS_NewArray(ctx);
        if (JS_IsException(A))
            goto exception;
        n = 0;
        for(;;) {
            JS_FreeValue(ctx, result);
            result = JS_RegExpExec(ctx, rx, S);
            if (JS_IsException(result))
                goto exception;
            if (JS_IsNull(result))
                break;
            matchStr = JS_ToStringFree(ctx, JS_GetPropertyInt64(ctx, result, 0));
            if (JS_IsException(matchStr))
                goto exception;
            isEmpty = JS_IsEmptyString(matchStr);
            if (JS_SetPropertyInt64(ctx, A, n++, matchStr) < 0)
                goto exception;
            if (isEmpty) {
                int64_t thisIndex, nextIndex;
                if (JS_ToLengthFree(ctx, &thisIndex,
                                    JS_GetProperty(ctx, rx, JS_ATOM_lastIndex)) < 0)
                    goto exception;
                p = JS_VALUE_GET_STRING(S);
                nextIndex = string_advance_index(p, thisIndex, fullUnicode);
                if (JS_SetProperty(ctx, rx, JS_ATOM_lastIndex, JS_NewInt64(ctx, nextIndex)) < 0)
                    goto exception;
            }
        }
        if (n == 0) {
            JS_FreeValue(ctx, A);
            A = JS_NULL;
        }
    }
    JS_FreeValue(ctx, result);
    JS_FreeValue(ctx, S);
    return A;

exception:
    JS_FreeValue(ctx, A);
    JS_FreeValue(ctx, result);
    JS_FreeValue(ctx, S);
    return JS_EXCEPTION;
}

typedef struct JSRegExpStringIteratorData {
    JSValue iterating_regexp;
    JSValue iterated_string;
    BOOL global;
    BOOL unicode;
    BOOL done;
} JSRegExpStringIteratorData;

static void js_regexp_string_iterator_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSRegExpStringIteratorData *it = p->u.regexp_string_iterator_data;
    if (it) {
        JS_FreeValueRT(rt, it->iterating_regexp);
        JS_FreeValueRT(rt, it->iterated_string);
        js_free_rt(rt, it);
    }
}

static void js_regexp_string_iterator_mark(JSRuntime *rt, JSValueConst val,
                                           JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSRegExpStringIteratorData *it = p->u.regexp_string_iterator_data;
    if (it) {
        JS_MarkValue(rt, it->iterating_regexp, mark_func);
        JS_MarkValue(rt, it->iterated_string, mark_func);
    }
}

static JSValue js_regexp_string_iterator_next(JSContext *ctx,
                                              JSValueConst this_val,
                                              int argc, JSValueConst *argv,
                                              BOOL *pdone, int magic)
{
    JSRegExpStringIteratorData *it;
    JSValueConst R, S;
    JSValue matchStr = JS_UNDEFINED, match = JS_UNDEFINED;
    JSString *sp;

    it = (JSRegExpStringIteratorData*) JS_GetOpaque2(ctx, this_val, JS_CLASS_REGEXP_STRING_ITERATOR);
    if (!it)
        goto exception;
    if (it->done) {
        *pdone = TRUE;
        return JS_UNDEFINED;
    }
    R = it->iterating_regexp;
    S = it->iterated_string;
    match = JS_RegExpExec(ctx, R, S);
    if (JS_IsException(match))
        goto exception;
    if (JS_IsNull(match)) {
        it->done = TRUE;
        *pdone = TRUE;
        return JS_UNDEFINED;
    } else if (it->global) {
        matchStr = JS_ToStringFree(ctx, JS_GetPropertyInt64(ctx, match, 0));
        if (JS_IsException(matchStr))
            goto exception;
        if (JS_IsEmptyString(matchStr)) {
            int64_t thisIndex, nextIndex;
            if (JS_ToLengthFree(ctx, &thisIndex,
                                JS_GetProperty(ctx, R, JS_ATOM_lastIndex)) < 0)
                goto exception;
            sp = JS_VALUE_GET_STRING(S);
            nextIndex = string_advance_index(sp, thisIndex, it->unicode);
            if (JS_SetProperty(ctx, R, JS_ATOM_lastIndex,
                               JS_NewInt64(ctx, nextIndex)) < 0)
                goto exception;
        }
        JS_FreeValue(ctx, matchStr);
    } else {
        it->done = TRUE;
    }
    *pdone = FALSE;
    return match;
 exception:
    JS_FreeValue(ctx, match);
    JS_FreeValue(ctx, matchStr);
    *pdone = FALSE;
    return JS_EXCEPTION;
}

static JSValue js_regexp_Symbol_matchAll(JSContext *ctx, JSValueConst this_val,
                                         int argc, JSValueConst *argv)
{
    // [Symbol.matchAll](str)
    JSValueConst R = this_val;
    JSValue S, C, flags, matcher, iter;
    JSValueConst args[2];
    JSString *strp;
    int64_t lastIndex;
    JSRegExpStringIteratorData *it;

    if (!JS_IsObject(R))
        return JS_ThrowTypeErrorNotAnObject(ctx);

    C = JS_UNDEFINED;
    flags = JS_UNDEFINED;
    matcher = JS_UNDEFINED;
    iter = JS_UNDEFINED;

    S = JS_ToString(ctx, argv[0]);
    if (JS_IsException(S))
        goto exception;
    C = JS_SpeciesConstructor(ctx, R, ctx->regexp_ctor);
    if (JS_IsException(C))
        goto exception;
    flags = JS_ToStringFree(ctx, JS_GetProperty(ctx, R, JS_ATOM_flags));
    if (JS_IsException(flags))
        goto exception;
    args[0] = R;
    args[1] = flags;
    matcher = JS_CallConstructor(ctx, C, 2, args);
    if (JS_IsException(matcher))
        goto exception;
    if (JS_ToLengthFree(ctx, &lastIndex,
                        JS_GetProperty(ctx, R, JS_ATOM_lastIndex)))
        goto exception;
    if (JS_SetProperty(ctx, matcher, JS_ATOM_lastIndex,
                       JS_NewInt64(ctx, lastIndex)) < 0)
        goto exception;

    iter = JS_NewObjectClass(ctx, JS_CLASS_REGEXP_STRING_ITERATOR);
    if (JS_IsException(iter))
        goto exception;
    it = (JSRegExpStringIteratorData*) js_malloc(ctx, sizeof(*it));
    if (!it)
        goto exception;
    it->iterating_regexp = matcher;
    it->iterated_string = S;
    strp = JS_VALUE_GET_STRING(flags);
    it->global = string_indexof_char(strp, 'g', 0) >= 0;
    it->unicode = string_indexof_char(strp, 'u', 0) >= 0;
    it->done = FALSE;
    JS_SetOpaque(iter, it);

    JS_FreeValue(ctx, C);
    JS_FreeValue(ctx, flags);
    return iter;
 exception:
    JS_FreeValue(ctx, S);
    JS_FreeValue(ctx, C);
    JS_FreeValue(ctx, flags);
    JS_FreeValue(ctx, matcher);
    JS_FreeValue(ctx, iter);
    return JS_EXCEPTION;
}

typedef struct ValueBuffer {
    JSContext *ctx;
    JSValue *arr;
    JSValue def[4];
    int len;
    int size;
    int error_status;
} ValueBuffer;

static int value_buffer_init(JSContext *ctx, ValueBuffer *b)
{
    b->ctx = ctx;
    b->len = 0;
    b->size = 4;
    b->error_status = 0;
    b->arr = b->def;
    return 0;
}

static void value_buffer_free(ValueBuffer *b)
{
    while (b->len > 0)
        JS_FreeValue(b->ctx, b->arr[--b->len]);
    if (b->arr != b->def)
        js_free(b->ctx, b->arr);
    b->arr = b->def;
    b->size = 4;
}

static int value_buffer_append(ValueBuffer *b, JSValue val)
{
    if (b->error_status)
        return -1;

    if (b->len >= b->size) {
        int new_size = (b->len + (b->len >> 1) + 31) & ~16;
        size_t slack;
        JSValue *new_arr;

        if (b->arr == b->def) {
            new_arr = (JSValue*) js_realloc2(b->ctx, NULL, sizeof(*b->arr) * new_size, &slack);
            if (new_arr)
                memcpy(new_arr, b->def, sizeof b->def);
        } else {
            new_arr = (JSValue*) js_realloc2(b->ctx, b->arr, sizeof(*b->arr) * new_size, &slack);
        }
        if (!new_arr) {
            value_buffer_free(b);
            JS_FreeValue(b->ctx, val);
            b->error_status = -1;
            return -1;
        }
        new_size += slack / sizeof(*new_arr);
        b->arr = new_arr;
        b->size = new_size;
    }
    b->arr[b->len++] = val;
    return 0;
}

static int js_is_standard_regexp(JSContext *ctx, JSValueConst rx)
{
    JSValue val;
    int res;

    val = JS_GetProperty(ctx, rx, JS_ATOM_constructor);
    if (JS_IsException(val))
        return -1;
    // rx.constructor === RegExp
    res = js_same_value(ctx, val, ctx->regexp_ctor);
    JS_FreeValue(ctx, val);
    if (res) {
        val = JS_GetProperty(ctx, rx, JS_ATOM_exec);
        if (JS_IsException(val))
            return -1;
        // rx.exec === RE_exec
        res = JS_IsCFunction(ctx, val, js_regexp_exec, 0);
        JS_FreeValue(ctx, val);
    }
    return res;
}

static JSValue js_regexp_Symbol_replace(JSContext *ctx, JSValueConst this_val,
                                        int argc, JSValueConst *argv)
{
    // [Symbol.replace](str, rep)
    JSValueConst rx = this_val, rep = argv[1];
    JSValueConst args[6];
    JSValue str, rep_val, matched, tab, rep_str, namedCaptures, res;
    JSString *sp, *rp;
    StringBuffer b_s, *b = &b_s;
    ValueBuffer v_b, *results = &v_b;
    int nextSourcePosition, n, j, functionalReplace, is_global, fullUnicode;
    uint32_t nCaptures;
    int64_t position;

    if (!JS_IsObject(rx))
        return JS_ThrowTypeErrorNotAnObject(ctx);

    string_buffer_init(ctx, b, 0);
    value_buffer_init(ctx, results);

    rep_val = JS_UNDEFINED;
    matched = JS_UNDEFINED;
    tab = JS_UNDEFINED;
    rep_str = JS_UNDEFINED;
    namedCaptures = JS_UNDEFINED;

    str = JS_ToString(ctx, argv[0]);
    if (JS_IsException(str))
        goto exception;

    sp = JS_VALUE_GET_STRING(str);
    rp = NULL;
    functionalReplace = JS_IsFunction(ctx, rep);
    if (!functionalReplace) {
        rep_val = JS_ToString(ctx, rep);
        if (JS_IsException(rep_val))
            goto exception;
        rp = JS_VALUE_GET_STRING(rep_val);
    }
    fullUnicode = 0;
    is_global = JS_ToBoolFree(ctx, JS_GetProperty(ctx, rx, JS_ATOM_global));
    if (is_global < 0)
        goto exception;
    if (is_global) {
        fullUnicode = JS_ToBoolFree(ctx, JS_GetProperty(ctx, rx, JS_ATOM_unicode));
        if (fullUnicode < 0)
            goto exception;
        if (JS_SetProperty(ctx, rx, JS_ATOM_lastIndex, JS_NewInt32(ctx, 0)) < 0)
            goto exception;
    }

    if (rp && rp->len == 0 && is_global && js_is_standard_regexp(ctx, rx)) {
        /* use faster version for simple cases */
        res = JS_RegExpDelete(ctx, rx, str);
        goto done;
    }
    for(;;) {
        JSValue result;
        result = JS_RegExpExec(ctx, rx, str);
        if (JS_IsException(result))
            goto exception;
        if (JS_IsNull(result))
            break;
        if (value_buffer_append(results, result) < 0)
            goto exception;
        if (!is_global)
            break;
        JS_FreeValue(ctx, matched);
        matched = JS_ToStringFree(ctx, JS_GetPropertyInt64(ctx, result, 0));
        if (JS_IsException(matched))
            goto exception;
        if (JS_IsEmptyString(matched)) {
            /* always advance of at least one char */
            int64_t thisIndex, nextIndex;
            if (JS_ToLengthFree(ctx, &thisIndex, JS_GetProperty(ctx, rx, JS_ATOM_lastIndex)) < 0)
                goto exception;
            nextIndex = string_advance_index(sp, thisIndex, fullUnicode);
            if (JS_SetProperty(ctx, rx, JS_ATOM_lastIndex, JS_NewInt64(ctx, nextIndex)) < 0)
                goto exception;
        }
    }
    nextSourcePosition = 0;
    for(j = 0; j < results->len; j++) {
        JSValueConst result;
        result = results->arr[j];
        if (js_get_length32(ctx, &nCaptures, result) < 0)
            goto exception;
        JS_FreeValue(ctx, matched);
        matched = JS_ToStringFree(ctx, JS_GetPropertyInt64(ctx, result, 0));
        if (JS_IsException(matched))
            goto exception;
        if (JS_ToLengthFree(ctx, &position, JS_GetProperty(ctx, result, JS_ATOM_index)))
            goto exception;
        if (position > sp->len)
            position = sp->len;
        else if (position < 0)
            position = 0;
        /* ignore substition if going backward (can happen
           with custom regexp object) */
        JS_FreeValue(ctx, tab);
        tab = JS_NewArray(ctx);
        if (JS_IsException(tab))
            goto exception;
        if (JS_DefinePropertyValueInt64(ctx, tab, 0, JS_DupValue(ctx, matched),
                                        JS_PROP_C_W_E | JS_PROP_THROW) < 0)
            goto exception;
        for(n = 1; n < nCaptures; n++) {
            JSValue capN;
            capN = JS_GetPropertyInt64(ctx, result, n);
            if (JS_IsException(capN))
                goto exception;
            if (!JS_IsUndefined(capN)) {
                capN = JS_ToStringFree(ctx, capN);
                if (JS_IsException(capN))
                    goto exception;
            }
            if (JS_DefinePropertyValueInt64(ctx, tab, n, capN,
                                            JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                goto exception;
        }
        JS_FreeValue(ctx, namedCaptures);
        namedCaptures = JS_GetProperty(ctx, result, JS_ATOM_groups);
        if (JS_IsException(namedCaptures))
            goto exception;
        if (functionalReplace) {
            if (JS_DefinePropertyValueInt64(ctx, tab, n++, JS_NewInt32(ctx, position), JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                goto exception;
            if (JS_DefinePropertyValueInt64(ctx, tab, n++, JS_DupValue(ctx, str), JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                goto exception;
            if (!JS_IsUndefined(namedCaptures)) {
                if (JS_DefinePropertyValueInt64(ctx, tab, n++, JS_DupValue(ctx, namedCaptures), JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                    goto exception;
            }
            args[0] = JS_UNDEFINED;
            args[1] = tab;
            JS_FreeValue(ctx, rep_str);
            rep_str = JS_ToStringFree(ctx, js_function_apply(ctx, rep, 2, args, 0));
        } else {
            JSValue namedCaptures1;
            if (!JS_IsUndefined(namedCaptures)) {
                namedCaptures1 = JS_ToObject(ctx, namedCaptures);
                if (JS_IsException(namedCaptures1))
                    goto exception;
            } else {
                namedCaptures1 = JS_UNDEFINED;
            }
            args[0] = matched;
            args[1] = str;
            args[2] = JS_NewInt32(ctx, position);
            args[3] = tab;
            args[4] = namedCaptures1;
            args[5] = rep_val;
            JS_FreeValue(ctx, rep_str);
            rep_str = js_string___GetSubstitution(ctx, JS_UNDEFINED, 6, args);
            JS_FreeValue(ctx, namedCaptures1);
        }
        if (JS_IsException(rep_str))
            goto exception;
        if (position >= nextSourcePosition) {
            string_buffer_concat(b, sp, nextSourcePosition, position);
            string_buffer_concat_value(b, rep_str);
            nextSourcePosition = position + JS_VALUE_GET_STRING(matched)->len;
        }
    }
    string_buffer_concat(b, sp, nextSourcePosition, sp->len);
    res = string_buffer_end(b);
    goto done1;

exception:
    res = JS_EXCEPTION;
done:
    string_buffer_free(b);
done1:
    value_buffer_free(results);
    JS_FreeValue(ctx, rep_val);
    JS_FreeValue(ctx, matched);
    JS_FreeValue(ctx, tab);
    JS_FreeValue(ctx, rep_str);
    JS_FreeValue(ctx, namedCaptures);
    JS_FreeValue(ctx, str);
    return res;
}

static JSValue js_regexp_Symbol_search(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    JSValueConst rx = this_val;
    JSValue str, previousLastIndex, currentLastIndex, result, index;

    if (!JS_IsObject(rx))
        return JS_ThrowTypeErrorNotAnObject(ctx);

    result = JS_UNDEFINED;
    currentLastIndex = JS_UNDEFINED;
    previousLastIndex = JS_UNDEFINED;
    str = JS_ToString(ctx, argv[0]);
    if (JS_IsException(str))
        goto exception;

    previousLastIndex = JS_GetProperty(ctx, rx, JS_ATOM_lastIndex);
    if (JS_IsException(previousLastIndex))
        goto exception;

    if (!js_same_value(ctx, previousLastIndex, JS_NewInt32(ctx, 0))) {
        if (JS_SetProperty(ctx, rx, JS_ATOM_lastIndex, JS_NewInt32(ctx, 0)) < 0) {
            goto exception;
        }
    }
    result = JS_RegExpExec(ctx, rx, str);
    if (JS_IsException(result))
        goto exception;
    currentLastIndex = JS_GetProperty(ctx, rx, JS_ATOM_lastIndex);
    if (JS_IsException(currentLastIndex))
        goto exception;
    if (js_same_value(ctx, currentLastIndex, previousLastIndex)) {
        JS_FreeValue(ctx, previousLastIndex);
    } else {
        if (JS_SetProperty(ctx, rx, JS_ATOM_lastIndex, previousLastIndex) < 0) {
            previousLastIndex = JS_UNDEFINED;
            goto exception;
        }
    }
    JS_FreeValue(ctx, str);
    JS_FreeValue(ctx, currentLastIndex);

    if (JS_IsNull(result)) {
        return JS_NewInt32(ctx, -1);
    } else {
        index = JS_GetProperty(ctx, result, JS_ATOM_index);
        JS_FreeValue(ctx, result);
        return index;
    }

exception:
    JS_FreeValue(ctx, result);
    JS_FreeValue(ctx, str);
    JS_FreeValue(ctx, currentLastIndex);
    JS_FreeValue(ctx, previousLastIndex);
    return JS_EXCEPTION;
}

static JSValue js_regexp_Symbol_split(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    // [Symbol.split](str, limit)
    JSValueConst rx = this_val;
    JSValueConst args[2];
    JSValue str, ctor, splitter, A, flags, z, sub;
    JSString *strp;
    uint32_t lim, size, p, q;
    int unicodeMatching;
    int64_t lengthA, e, numberOfCaptures, i;

    if (!JS_IsObject(rx))
        return JS_ThrowTypeErrorNotAnObject(ctx);

    ctor = JS_UNDEFINED;
    splitter = JS_UNDEFINED;
    A = JS_UNDEFINED;
    flags = JS_UNDEFINED;
    z = JS_UNDEFINED;
    str = JS_ToString(ctx, argv[0]);
    if (JS_IsException(str))
        goto exception;
    ctor = JS_SpeciesConstructor(ctx, rx, ctx->regexp_ctor);
    if (JS_IsException(ctor))
        goto exception;
    flags = JS_ToStringFree(ctx, JS_GetProperty(ctx, rx, JS_ATOM_flags));
    if (JS_IsException(flags))
        goto exception;
    strp = JS_VALUE_GET_STRING(flags);
    unicodeMatching = string_indexof_char(strp, 'u', 0) >= 0;
    if (string_indexof_char(strp, 'y', 0) < 0) {
        flags = JS_ConcatString3(ctx, "", flags, "y");
        if (JS_IsException(flags))
            goto exception;
    }
    args[0] = rx;
    args[1] = flags;
    splitter = JS_CallConstructor(ctx, ctor, 2, args);
    if (JS_IsException(splitter))
        goto exception;
    A = JS_NewArray(ctx);
    if (JS_IsException(A))
        goto exception;
    lengthA = 0;
    if (JS_IsUndefined(argv[1])) {
        lim = 0xffffffff;
    } else {
        if (JS_ToUint32(ctx, &lim, argv[1]) < 0)
            goto exception;
        if (lim == 0)
            goto done;
    }
    strp = JS_VALUE_GET_STRING(str);
    p = q = 0;
    size = strp->len;
    if (size == 0) {
        z = JS_RegExpExec(ctx, splitter, str);
        if (JS_IsException(z))
            goto exception;
        if (JS_IsNull(z))
            goto add_tail;
        goto done;
    }
    while (q < size) {
        if (JS_SetProperty(ctx, splitter, JS_ATOM_lastIndex, JS_NewInt32(ctx, q)) < 0)
            goto exception;
        JS_FreeValue(ctx, z);
        z = JS_RegExpExec(ctx, splitter, str);
        if (JS_IsException(z))
            goto exception;
        if (JS_IsNull(z)) {
            q = string_advance_index(strp, q, unicodeMatching);
        } else {
            if (JS_ToLengthFree(ctx, &e, JS_GetProperty(ctx, splitter, JS_ATOM_lastIndex)))
                goto exception;
            if (e > size)
                e = size;
            if (e == p) {
                q = string_advance_index(strp, q, unicodeMatching);
            } else {
                sub = js_sub_string(ctx, strp, p, q);
                if (JS_IsException(sub))
                    goto exception;
                if (JS_DefinePropertyValueInt64(ctx, A, lengthA++, sub,
                                                JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                    goto exception;
                if (lengthA == lim)
                    goto done;
                p = e;
                if (js_get_length64(ctx, &numberOfCaptures, z))
                    goto exception;
                for(i = 1; i < numberOfCaptures; i++) {
                    sub = JS_ToStringFree(ctx, JS_GetPropertyInt64(ctx, z, i));
                    if (JS_IsException(sub))
                        goto exception;
                    if (JS_DefinePropertyValueInt64(ctx, A, lengthA++, sub, JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                        goto exception;
                    if (lengthA == lim)
                        goto done;
                }
                q = p;
            }
        }
    }
add_tail:
    if (p > size)
        p = size;
    sub = js_sub_string(ctx, strp, p, size);
    if (JS_IsException(sub))
        goto exception;
    if (JS_DefinePropertyValueInt64(ctx, A, lengthA++, sub, JS_PROP_C_W_E | JS_PROP_THROW) < 0)
        goto exception;
    goto done;
exception:
    JS_FreeValue(ctx, A);
    A = JS_EXCEPTION;
done:
    JS_FreeValue(ctx, str);
    JS_FreeValue(ctx, ctor);
    JS_FreeValue(ctx, splitter);
    JS_FreeValue(ctx, flags);
    JS_FreeValue(ctx, z);
    return A;
}

static const JSCFunctionListEntry js_regexp_funcs[] = {
    JS_CGETSET_DEF("[Symbol.species]", js_get_this, NULL ),
    //JS_CFUNC_DEF("__RegExpExec", 2, js_regexp___RegExpExec ),
    //JS_CFUNC_DEF("__RegExpDelete", 2, js_regexp___RegExpDelete ),
};

static const JSCFunctionListEntry js_regexp_proto_funcs[] = {
    JS_CGETSET_DEF("flags", js_regexp_get_flags, NULL ),
    JS_CGETSET_DEF("source", js_regexp_get_source, NULL ),
    JS_CGETSET_MAGIC_DEF("global", js_regexp_get_flag, NULL, 1 ),
    JS_CGETSET_MAGIC_DEF("ignoreCase", js_regexp_get_flag, NULL, 2 ),
    JS_CGETSET_MAGIC_DEF("multiline", js_regexp_get_flag, NULL, 4 ),
    JS_CGETSET_MAGIC_DEF("dotAll", js_regexp_get_flag, NULL, 8 ),
    JS_CGETSET_MAGIC_DEF("unicode", js_regexp_get_flag, NULL, 16 ),
    JS_CGETSET_MAGIC_DEF("sticky", js_regexp_get_flag, NULL, 32 ),
    JS_CFUNC_DEF("exec", 1, js_regexp_exec ),
    JS_CFUNC_DEF("compile", 2, js_regexp_compile ),
    JS_CFUNC_DEF("test", 1, js_regexp_test ),
    JS_CFUNC_DEF("toString", 0, js_regexp_toString ),
    JS_CFUNC_DEF("[Symbol.replace]", 2, js_regexp_Symbol_replace ),
    JS_CFUNC_DEF("[Symbol.match]", 1, js_regexp_Symbol_match ),
    JS_CFUNC_DEF("[Symbol.matchAll]", 1, js_regexp_Symbol_matchAll ),
    JS_CFUNC_DEF("[Symbol.search]", 1, js_regexp_Symbol_search ),
    JS_CFUNC_DEF("[Symbol.split]", 2, js_regexp_Symbol_split ),
    //JS_CGETSET_DEF("__source", js_regexp_get___source, NULL ),
    //JS_CGETSET_DEF("__flags", js_regexp_get___flags, NULL ),
};

static const JSCFunctionListEntry js_regexp_string_iterator_proto_funcs[] = {
    JS_ITERATOR_NEXT_DEF("next", 0, js_regexp_string_iterator_next, 0 ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "RegExp String Iterator", JS_PROP_CONFIGURABLE ),
};

inline void JS_AddIntrinsicRegExpCompiler(JSContext *ctx)
{
    ctx->compile_regexp = js_compile_regexp;
}

inline void JS_AddIntrinsicRegExp(JSContext *ctx)
{
    JSValueConst obj;

    JS_AddIntrinsicRegExpCompiler(ctx);

    ctx->class_proto[JS_CLASS_REGEXP] = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_REGEXP], js_regexp_proto_funcs,
                               countof(js_regexp_proto_funcs));
    obj = JS_NewGlobalCConstructor(ctx, "RegExp", js_regexp_constructor, 2,
                                   ctx->class_proto[JS_CLASS_REGEXP]);
    ctx->regexp_ctor = JS_DupValue(ctx, obj);
    JS_SetPropertyFunctionList(ctx, obj, js_regexp_funcs, countof(js_regexp_funcs));

    ctx->class_proto[JS_CLASS_REGEXP_STRING_ITERATOR] =
        JS_NewObjectProto(ctx, ctx->iterator_proto);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_REGEXP_STRING_ITERATOR],
                               js_regexp_string_iterator_proto_funcs,
                               countof(js_regexp_string_iterator_proto_funcs));
}

/* JSON */

static int json_parse_expect(JSParseState *s, int tok)
{
    if (s->token.val != tok) {
        /* XXX: dump token correctly in all cases */
        return js_parse_error(s, "expecting '%c'", tok);
    }
    return json_next_token(s);
}

static JSValue json_parse_value(JSParseState *s)
{
    JSContext *ctx = s->ctx;
    JSValue val = JS_NULL;
    int ret;

    switch(s->token.val) {
    case '{':
        {
            JSValue prop_val;
            JSAtom prop_name;

            if (json_next_token(s))
                goto fail;
            val = JS_NewObject(ctx);
            if (JS_IsException(val))
                goto fail;
            if (s->token.val != '}') {
                for(;;) {
                    if (s->token.val == TOK_STRING) {
                        prop_name = JS_ValueToAtom(ctx, s->token.u.str.str);
                        if (prop_name == JS_ATOM_NULL)
                            goto fail;
                    } else if (s->ext_json && s->token.val == TOK_IDENT) {
                        prop_name = JS_DupAtom(ctx, s->token.u.ident.atom);
                    } else {
                        js_parse_error(s, "expecting property name");
                        goto fail;
                    }
                    if (json_next_token(s))
                        goto fail1;
                    if (json_parse_expect(s, ':'))
                        goto fail1;
                    prop_val = json_parse_value(s);
                    if (JS_IsException(prop_val)) {
                    fail1:
                        JS_FreeAtom(ctx, prop_name);
                        goto fail;
                    }
                    ret = JS_DefinePropertyValue(ctx, val, prop_name,
                                                 prop_val, JS_PROP_C_W_E);
                    JS_FreeAtom(ctx, prop_name);
                    if (ret < 0)
                        goto fail;

                    if (s->token.val != ',')
                        break;
                    if (json_next_token(s))
                        goto fail;
                    if (s->ext_json && s->token.val == '}')
                        break;
                }
            }
            if (json_parse_expect(s, '}'))
                goto fail;
        }
        break;
    case '[':
        {
            JSValue el;
            uint32_t idx;

            if (json_next_token(s))
                goto fail;
            val = JS_NewArray(ctx);
            if (JS_IsException(val))
                goto fail;
            if (s->token.val != ']') {
                idx = 0;
                for(;;) {
                    el = json_parse_value(s);
                    if (JS_IsException(el))
                        goto fail;
                    ret = JS_DefinePropertyValueUint32(ctx, val, idx, el, JS_PROP_C_W_E);
                    if (ret < 0)
                        goto fail;
                    if (s->token.val != ',')
                        break;
                    if (json_next_token(s))
                        goto fail;
                    idx++;
                    if (s->ext_json && s->token.val == ']')
                        break;
                }
            }
            if (json_parse_expect(s, ']'))
                goto fail;
        }
        break;
    case TOK_STRING:
        val = JS_DupValue(ctx, s->token.u.str.str);
        if (json_next_token(s))
            goto fail;
        break;
    case TOK_NUMBER:
        val = s->token.u.num.val;
        if (json_next_token(s))
            goto fail;
        break;
    case TOK_IDENT:
        if (s->token.u.ident.atom == JS_ATOM_false ||
            s->token.u.ident.atom == JS_ATOM_true) {
            val = JS_NewBool(ctx, (s->token.u.ident.atom == JS_ATOM_true));
        } else if (s->token.u.ident.atom == JS_ATOM_null) {
            val = JS_NULL;
        } else {
            goto def_token;
        }
        if (json_next_token(s))
            goto fail;
        break;
    default:
    def_token:
        if (s->token.val == TOK_EOF) {
            js_parse_error(s, "unexpected end of input");
        } else {
            js_parse_error(s, "unexpected token: '%.*s'",
                           (int)(s->buf_ptr - s->token.ptr), s->token.ptr);
        }
        goto fail;
    }
    return val;
 fail:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

inline JSValue JS_ParseJSON2(JSContext *ctx, const char *buf, size_t buf_len,
                      const char *filename, int flags)
{
    JSParseState s1, *s = &s1;
    JSValue val = JS_UNDEFINED;

    js_parse_init(ctx, s, buf, buf_len, filename);
    s->ext_json = ((flags & JS_PARSE_JSON_EXT) != 0);
    if (json_next_token(s))
        goto fail;
    val = json_parse_value(s);
    if (JS_IsException(val))
        goto fail;
    if (s->token.val != TOK_EOF) {
        if (js_parse_error(s, "unexpected data at the end"))
            goto fail;
    }
    return val;
 fail:
    JS_FreeValue(ctx, val);
    free_token(s, &s->token);
    return JS_EXCEPTION;
}

inline JSValue JS_ParseJSON(JSContext *ctx, const char *buf, size_t buf_len,
                     const char *filename)
{
    return JS_ParseJSON2(ctx, buf, buf_len, filename, 0);
}

static JSValue internalize_json_property(JSContext *ctx, JSValueConst holder,
                                         JSAtom name, JSValueConst reviver)
{
    JSValue val, new_el, name_val, res;
    JSValueConst args[2];
    int ret, is_array;
    uint32_t i, len = 0;
    JSAtom prop;
    JSPropertyEnum *atoms = NULL;

    if (js_check_stack_overflow(ctx->rt, 0)) {
        return JS_ThrowStackOverflow(ctx);
    }

    val = JS_GetProperty(ctx, holder, name);
    if (JS_IsException(val))
        return val;
    if (JS_IsObject(val)) {
        is_array = JS_IsArray(ctx, val);
        if (is_array < 0)
            goto fail;
        if (is_array) {
            if (js_get_length32(ctx, &len, val))
                goto fail;
        } else {
            ret = JS_GetOwnPropertyNamesInternal(ctx, &atoms, &len, JS_VALUE_GET_OBJ(val), JS_GPN_ENUM_ONLY | JS_GPN_STRING_MASK);
            if (ret < 0)
                goto fail;
        }
        for(i = 0; i < len; i++) {
            if (is_array) {
                prop = JS_NewAtomUInt32(ctx, i);
                if (prop == JS_ATOM_NULL)
                    goto fail;
            } else {
                prop = JS_DupAtom(ctx, atoms[i].atom);
            }
            new_el = internalize_json_property(ctx, val, prop, reviver);
            if (JS_IsException(new_el)) {
                JS_FreeAtom(ctx, prop);
                goto fail;
            }
            if (JS_IsUndefined(new_el)) {
                ret = JS_DeleteProperty(ctx, val, prop, 0);
            } else {
                ret = JS_DefinePropertyValue(ctx, val, prop, new_el, JS_PROP_C_W_E);
            }
            JS_FreeAtom(ctx, prop);
            if (ret < 0)
                goto fail;
        }
    }
    js_free_prop_enum(ctx, atoms, len);
    atoms = NULL;
    name_val = JS_AtomToValue(ctx, name);
    if (JS_IsException(name_val))
        goto fail;
    args[0] = name_val;
    args[1] = val;
    res = JS_Call(ctx, reviver, holder, 2, args);
    JS_FreeValue(ctx, name_val);
    JS_FreeValue(ctx, val);
    return res;
 fail:
    js_free_prop_enum(ctx, atoms, len);
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static JSValue js_json_parse(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv)
{
    JSValue obj, root;
    JSValueConst reviver;
    const char *str;
    size_t len;

    str = JS_ToCStringLen(ctx, &len, argv[0]);
    if (!str)
        return JS_EXCEPTION;
    obj = JS_ParseJSON(ctx, str, len, "<input>");
    JS_FreeCString(ctx, str);
    if (JS_IsException(obj))
        return obj;
    if (argc > 1 && JS_IsFunction(ctx, argv[1])) {
        reviver = argv[1];
        root = JS_NewObject(ctx);
        if (JS_IsException(root)) {
            JS_FreeValue(ctx, obj);
            return JS_EXCEPTION;
        }
        if (JS_DefinePropertyValue(ctx, root, JS_ATOM_empty_string, obj,
                                   JS_PROP_C_W_E) < 0) {
            JS_FreeValue(ctx, root);
            return JS_EXCEPTION;
        }
        obj = internalize_json_property(ctx, root, JS_ATOM_empty_string,
                                        reviver);
        JS_FreeValue(ctx, root);
    }
    return obj;
}

typedef struct JSONStringifyContext {
    JSValueConst replacer_func;
    JSValue stack;
    JSValue property_list;
    JSValue gap;
    JSValue empty;
    StringBuffer *b;
} JSONStringifyContext;

static JSValue JS_ToQuotedStringFree(JSContext *ctx, JSValue val) {
    JSValue r = JS_ToQuotedString(ctx, val);
    JS_FreeValue(ctx, val);
    return r;
}

static JSValue js_json_check(JSContext *ctx, JSONStringifyContext *jsc,
                             JSValueConst holder, JSValue val, JSValueConst key)
{
    JSValue v;
    JSValueConst args[2];

    if (JS_IsObject(val)
#ifdef CONFIG_BIGNUM
    ||  JS_IsBigInt(ctx, val)   /* XXX: probably useless */
#endif
        ) {
            JSValue f = JS_GetProperty(ctx, val, JS_ATOM_toJSON);
            if (JS_IsException(f))
                goto exception;
            if (JS_IsFunction(ctx, f)) {
                v = JS_CallFree(ctx, f, val, 1, &key);
                JS_FreeValue(ctx, val);
                val = v;
                if (JS_IsException(val))
                    goto exception;
            } else {
                JS_FreeValue(ctx, f);
            }
        }

    if (!JS_IsUndefined(jsc->replacer_func)) {
        args[0] = key;
        args[1] = val;
        v = JS_Call(ctx, jsc->replacer_func, holder, 2, args);
        JS_FreeValue(ctx, val);
        val = v;
        if (JS_IsException(val))
            goto exception;
    }

    switch (JS_VALUE_GET_NORM_TAG(val)) {
    case JS_TAG_OBJECT:
        if (JS_IsFunction(ctx, val))
            break;
    case JS_TAG_STRING:
    case JS_TAG_INT:
    case JS_TAG_FLOAT64:
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_FLOAT:
#endif
    case JS_TAG_BOOL:
    case JS_TAG_NULL:
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
#endif
    case JS_TAG_EXCEPTION:
        return val;
    default:
        break;
    }
    JS_FreeValue(ctx, val);
    return JS_UNDEFINED;

exception:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static int js_json_to_str(JSContext *ctx, JSONStringifyContext *jsc,
                          JSValueConst holder, JSValue val,
                          JSValueConst indent)
{
    JSValue indent1, sep, sep1, tab, v, prop;
    JSObject *p;
    int64_t i, len;
    int cl, ret;
    BOOL has_content;

    indent1 = JS_UNDEFINED;
    sep = JS_UNDEFINED;
    sep1 = JS_UNDEFINED;
    tab = JS_UNDEFINED;
    prop = JS_UNDEFINED;

    switch (JS_VALUE_GET_NORM_TAG(val)) {
    case JS_TAG_OBJECT:
        p = JS_VALUE_GET_OBJ(val);
        cl = p->class_id;
        if (cl == JS_CLASS_STRING) {
            val = JS_ToStringFree(ctx, val);
            if (JS_IsException(val))
                goto exception;
            val = JS_ToQuotedStringFree(ctx, val);
            if (JS_IsException(val))
                goto exception;
            return string_buffer_concat_value_free(jsc->b, val);
        } else if (cl == JS_CLASS_NUMBER) {
            val = JS_ToNumberFree(ctx, val);
            if (JS_IsException(val))
                goto exception;
            return string_buffer_concat_value_free(jsc->b, val);
        } else if (cl == JS_CLASS_BOOLEAN) {
            ret = string_buffer_concat_value(jsc->b, p->u.object_data);
            JS_FreeValue(ctx, val);
            return ret;
        }
#ifdef CONFIG_BIGNUM
        else if (cl == JS_CLASS_BIG_FLOAT) {
            return string_buffer_concat_value_free(jsc->b, val);
        } else if (cl == JS_CLASS_BIG_INT) {
            JS_ThrowTypeError(ctx, "bigint are forbidden in JSON.stringify");
            goto exception;
        }
#endif
        v = js_array_includes(ctx, jsc->stack, 1, (JSValueConst *)&val);
        if (JS_IsException(v))
            goto exception;
        if (JS_ToBoolFree(ctx, v)) {
            JS_ThrowTypeError(ctx, "circular reference");
            goto exception;
        }
        indent1 = JS_ConcatString(ctx, JS_DupValue(ctx, indent), JS_DupValue(ctx, jsc->gap));
        if (JS_IsException(indent1))
            goto exception;
        if (!JS_IsEmptyString(jsc->gap)) {
            sep = JS_ConcatString3(ctx, "\n", JS_DupValue(ctx, indent1), "");
            if (JS_IsException(sep))
                goto exception;
            sep1 = JS_NewString(ctx, " ");
            if (JS_IsException(sep1))
                goto exception;
        } else {
            sep = JS_DupValue(ctx, jsc->empty);
            sep1 = JS_DupValue(ctx, jsc->empty);
        }
        v = js_array_push(ctx, jsc->stack, 1, (JSValueConst *)&val, 0);
        if (check_exception_free(ctx, v))
            goto exception;
        ret = JS_IsArray(ctx, val);
        if (ret < 0)
            goto exception;
        if (ret) {
            if (js_get_length64(ctx, &len, val))
                goto exception;
            string_buffer_putc8(jsc->b, '[');
            for(i = 0; i < len; i++) {
                if (i > 0)
                    string_buffer_putc8(jsc->b, ',');
                string_buffer_concat_value(jsc->b, sep);
                v = JS_GetPropertyInt64(ctx, val, i);
                if (JS_IsException(v))
                    goto exception;
                /* XXX: could do this string conversion only when needed */
                prop = JS_ToStringFree(ctx, JS_NewInt64(ctx, i));
                if (JS_IsException(prop))
                    goto exception;
                v = js_json_check(ctx, jsc, val, v, prop);
                JS_FreeValue(ctx, prop);
                prop = JS_UNDEFINED;
                if (JS_IsException(v))
                    goto exception;
                if (JS_IsUndefined(v))
                    v = JS_NULL;
                if (js_json_to_str(ctx, jsc, val, v, indent1))
                    goto exception;
            }
            if (len > 0 && !JS_IsEmptyString(jsc->gap)) {
                string_buffer_putc8(jsc->b, '\n');
                string_buffer_concat_value(jsc->b, indent);
            }
            string_buffer_putc8(jsc->b, ']');
        } else {
            if (!JS_IsUndefined(jsc->property_list))
                tab = JS_DupValue(ctx, jsc->property_list);
            else
                tab = js_object_keys(ctx, JS_UNDEFINED, 1, (JSValueConst *)&val, JS_ITERATOR_KIND_KEY);
            if (JS_IsException(tab))
                goto exception;
            if (js_get_length64(ctx, &len, tab))
                goto exception;
            string_buffer_putc8(jsc->b, '{');
            has_content = FALSE;
            for(i = 0; i < len; i++) {
                JS_FreeValue(ctx, prop);
                prop = JS_GetPropertyInt64(ctx, tab, i);
                if (JS_IsException(prop))
                    goto exception;
                v = JS_GetPropertyValue(ctx, val, JS_DupValue(ctx, prop));
                if (JS_IsException(v))
                    goto exception;
                v = js_json_check(ctx, jsc, val, v, prop);
                if (JS_IsException(v))
                    goto exception;
                if (!JS_IsUndefined(v)) {
                    if (has_content)
                        string_buffer_putc8(jsc->b, ',');
                    prop = JS_ToQuotedStringFree(ctx, prop);
                    if (JS_IsException(prop)) {
                        JS_FreeValue(ctx, v);
                        goto exception;
                    }
                    string_buffer_concat_value(jsc->b, sep);
                    string_buffer_concat_value(jsc->b, prop);
                    string_buffer_putc8(jsc->b, ':');
                    string_buffer_concat_value(jsc->b, sep1);
                    if (js_json_to_str(ctx, jsc, val, v, indent1))
                        goto exception;
                    has_content = TRUE;
                }
            }
            if (has_content && JS_VALUE_GET_STRING(jsc->gap)->len != 0) {
                string_buffer_putc8(jsc->b, '\n');
                string_buffer_concat_value(jsc->b, indent);
            }
            string_buffer_putc8(jsc->b, '}');
        }
        if (check_exception_free(ctx, js_array_pop(ctx, jsc->stack, 0, NULL, 0)))
            goto exception;
        JS_FreeValue(ctx, val);
        JS_FreeValue(ctx, tab);
        JS_FreeValue(ctx, sep);
        JS_FreeValue(ctx, sep1);
        JS_FreeValue(ctx, indent1);
        JS_FreeValue(ctx, prop);
        return 0;
    case JS_TAG_STRING:
        val = JS_ToQuotedStringFree(ctx, val);
        if (JS_IsException(val))
            goto exception;
        goto concat_value;
    case JS_TAG_FLOAT64:
        if (!isfinite(JS_VALUE_GET_FLOAT64(val))) {
            val = JS_NULL;
        }
        goto concat_value;
    case JS_TAG_INT:
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_FLOAT:
#endif
    case JS_TAG_BOOL:
    case JS_TAG_NULL:
    concat_value:
        return string_buffer_concat_value_free(jsc->b, val);
#ifdef CONFIG_BIGNUM
    case JS_TAG_BIG_INT:
        JS_ThrowTypeError(ctx, "bigint are forbidden in JSON.stringify");
        goto exception;
#endif
    default:
        JS_FreeValue(ctx, val);
        return 0;
    }

exception:
    JS_FreeValue(ctx, val);
    JS_FreeValue(ctx, tab);
    JS_FreeValue(ctx, sep);
    JS_FreeValue(ctx, sep1);
    JS_FreeValue(ctx, indent1);
    JS_FreeValue(ctx, prop);
    return -1;
}

inline JSValue JS_JSONStringify(JSContext *ctx, JSValueConst obj,
                         JSValueConst replacer, JSValueConst space0)
{
    StringBuffer b_s;
    JSONStringifyContext jsc_s, *jsc = &jsc_s;
    JSValue val, v, space, ret, wrapper;
    int res;
    int64_t i, j, n;

    jsc->replacer_func = JS_UNDEFINED;
    jsc->stack = JS_UNDEFINED;
    jsc->property_list = JS_UNDEFINED;
    jsc->gap = JS_UNDEFINED;
    jsc->b = &b_s;
    jsc->empty = JS_AtomToString(ctx, JS_ATOM_empty_string);
    ret = JS_UNDEFINED;
    wrapper = JS_UNDEFINED;

    string_buffer_init(ctx, jsc->b, 0);
    jsc->stack = JS_NewArray(ctx);
    if (JS_IsException(jsc->stack))
        goto exception;
    if (JS_IsFunction(ctx, replacer)) {
        jsc->replacer_func = replacer;
    } else {
        res = JS_IsArray(ctx, replacer);
        if (res < 0)
            goto exception;
        if (res) {
            /* XXX: enumeration is not fully correct */
            jsc->property_list = JS_NewArray(ctx);
            if (JS_IsException(jsc->property_list))
                goto exception;
            if (js_get_length64(ctx, &n, replacer))
                goto exception;
            for (i = j = 0; i < n; i++) {
                JSValue present;
                v = JS_GetPropertyInt64(ctx, replacer, i);
                if (JS_IsException(v))
                    goto exception;
                if (JS_IsObject(v)) {
                    JSObject *p = JS_VALUE_GET_OBJ(v);
                    if (p->class_id == JS_CLASS_STRING ||
                        p->class_id == JS_CLASS_NUMBER) {
                        v = JS_ToStringFree(ctx, v);
                        if (JS_IsException(v))
                            goto exception;
                    } else {
                        JS_FreeValue(ctx, v);
                        continue;
                    }
                } else if (JS_IsNumber(v)) {
                    v = JS_ToStringFree(ctx, v);
                    if (JS_IsException(v))
                        goto exception;
                } else if (!JS_IsString(v)) {
                    JS_FreeValue(ctx, v);
                    continue;
                }
                present = js_array_includes(ctx, jsc->property_list,
                                            1, (JSValueConst *)&v);
                if (JS_IsException(present)) {
                    JS_FreeValue(ctx, v);
                    goto exception;
                }
                if (!JS_ToBoolFree(ctx, present)) {
                    JS_SetPropertyInt64(ctx, jsc->property_list, j++, v);
                } else {
                    JS_FreeValue(ctx, v);
                }
            }
        }
    }
    space = JS_DupValue(ctx, space0);
    if (JS_IsObject(space)) {
        JSObject *p = JS_VALUE_GET_OBJ(space);
        if (p->class_id == JS_CLASS_NUMBER) {
            space = JS_ToNumberFree(ctx, space);
        } else if (p->class_id == JS_CLASS_STRING) {
            space = JS_ToStringFree(ctx, space);
        }
        if (JS_IsException(space)) {
            JS_FreeValue(ctx, space);
            goto exception;
        }
    }
    if (JS_IsNumber(space)) {
        int n;
        if (JS_ToInt32Clamp(ctx, &n, space, 0, 10, 0))
            goto exception;
        jsc->gap = JS_NewStringLen(ctx, "          ", n);
    } else if (JS_IsString(space)) {
        JSString *p = JS_VALUE_GET_STRING(space);
        jsc->gap = js_sub_string(ctx, p, 0, min_int(p->len, 10));
    } else {
        jsc->gap = JS_DupValue(ctx, jsc->empty);
    }
    JS_FreeValue(ctx, space);
    if (JS_IsException(jsc->gap))
        goto exception;
    wrapper = JS_NewObject(ctx);
    if (JS_IsException(wrapper))
        goto exception;
    if (JS_DefinePropertyValue(ctx, wrapper, JS_ATOM_empty_string,
                               JS_DupValue(ctx, obj), JS_PROP_C_W_E) < 0)
        goto exception;
    val = JS_DupValue(ctx, obj);

    val = js_json_check(ctx, jsc, wrapper, val, jsc->empty);
    if (JS_IsException(val))
        goto exception;
    if (JS_IsUndefined(val)) {
        ret = JS_UNDEFINED;
        goto done1;
    }
    if (js_json_to_str(ctx, jsc, wrapper, val, jsc->empty))
        goto exception;

    ret = string_buffer_end(jsc->b);
    goto done;

exception:
    ret = JS_EXCEPTION;
done1:
    string_buffer_free(jsc->b);
done:
    JS_FreeValue(ctx, wrapper);
    JS_FreeValue(ctx, jsc->empty);
    JS_FreeValue(ctx, jsc->gap);
    JS_FreeValue(ctx, jsc->property_list);
    JS_FreeValue(ctx, jsc->stack);
    return ret;
}

static JSValue js_json_stringify(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    // stringify(val, replacer, space)
    return JS_JSONStringify(ctx, argv[0], argv[1], argv[2]);
}

static const JSCFunctionListEntry js_json_funcs[] = {
    JS_CFUNC_DEF("parse", 2, js_json_parse ),
    JS_CFUNC_DEF("stringify", 3, js_json_stringify ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "JSON", JS_PROP_CONFIGURABLE ),
};

static const JSCFunctionListEntry js_json_obj[] = {
    JS_OBJECT_DEF("JSON", js_json_funcs, countof(js_json_funcs), JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE ),
};

inline void JS_AddIntrinsicJSON(JSContext *ctx)
{
    /* add JSON as autoinit object */
    JS_SetPropertyFunctionList(ctx, ctx->global_obj, js_json_obj, countof(js_json_obj));
}

/* Reflect */

static JSValue js_reflect_apply(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    return js_function_apply(ctx, argv[0], max_int(0, argc - 1), argv + 1, 2);
}

static JSValue js_reflect_construct(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    JSValueConst func, array_arg, new_target;
    JSValue *tab, ret;
    uint32_t len;

    func = argv[0];
    array_arg = argv[1];
    if (argc > 2) {
        new_target = argv[2];
        if (!JS_IsConstructor(ctx, new_target))
            return JS_ThrowTypeError(ctx, "not a constructor");
    } else {
        new_target = func;
    }
    tab = build_arg_list(ctx, &len, array_arg);
    if (!tab)
        return JS_EXCEPTION;
    ret = JS_CallConstructor2(ctx, func, new_target, len, (JSValueConst *)tab);
    free_arg_list(ctx, tab, len);
    return ret;
}

static JSValue js_reflect_deleteProperty(JSContext *ctx, JSValueConst this_val,
                                         int argc, JSValueConst *argv)
{
    JSValueConst obj;
    JSAtom atom;
    int ret;

    obj = argv[0];
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);
    atom = JS_ValueToAtom(ctx, argv[1]);
    if (js_unlikely(atom == JS_ATOM_NULL))
        return JS_EXCEPTION;
    ret = JS_DeleteProperty(ctx, obj, atom, 0);
    JS_FreeAtom(ctx, atom);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_reflect_get(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv)
{
    JSValueConst obj, prop, receiver;
    JSAtom atom;
    JSValue ret;

    obj = argv[0];
    prop = argv[1];
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);
    if (argc > 2)
        receiver = argv[2];
    else
        receiver = obj;
    atom = JS_ValueToAtom(ctx, prop);
    if (js_unlikely(atom == JS_ATOM_NULL))
        return JS_EXCEPTION;
    ret = JS_GetPropertyInternal(ctx, obj, atom, receiver, FALSE);
    JS_FreeAtom(ctx, atom);
    return ret;
}

static JSValue js_reflect_has(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv)
{
    JSValueConst obj, prop;
    JSAtom atom;
    int ret;

    obj = argv[0];
    prop = argv[1];
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);
    atom = JS_ValueToAtom(ctx, prop);
    if (js_unlikely(atom == JS_ATOM_NULL))
        return JS_EXCEPTION;
    ret = JS_HasProperty(ctx, obj, atom);
    JS_FreeAtom(ctx, atom);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_reflect_set(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv)
{
    JSValueConst obj, prop, val, receiver;
    int ret;
    JSAtom atom;

    obj = argv[0];
    prop = argv[1];
    val = argv[2];
    if (argc > 3)
        receiver = argv[3];
    else
        receiver = obj;
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);
    atom = JS_ValueToAtom(ctx, prop);
    if (js_unlikely(atom == JS_ATOM_NULL))
        return JS_EXCEPTION;
    ret = JS_SetPropertyGeneric(ctx, obj, atom,
                                JS_DupValue(ctx, val), receiver, 0);
    JS_FreeAtom(ctx, atom);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_reflect_setPrototypeOf(JSContext *ctx, JSValueConst this_val,
                                         int argc, JSValueConst *argv)
{
    int ret;
    ret = JS_SetPrototypeInternal(ctx, argv[0], argv[1], FALSE);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_reflect_ownKeys(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    if (JS_VALUE_GET_TAG(argv[0]) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);
    return JS_GetOwnPropertyNames2(ctx, argv[0],
                                   JS_GPN_STRING_MASK | JS_GPN_SYMBOL_MASK,
                                   JS_ITERATOR_KIND_KEY);
}

static const JSCFunctionListEntry js_reflect_funcs[] = {
    JS_CFUNC_DEF("apply", 3, js_reflect_apply ),
    JS_CFUNC_DEF("construct", 2, js_reflect_construct ),
    JS_CFUNC_MAGIC_DEF("defineProperty", 3, js_object_defineProperty, 1 ),
    JS_CFUNC_DEF("deleteProperty", 2, js_reflect_deleteProperty ),
    JS_CFUNC_DEF("get", 2, js_reflect_get ),
    JS_CFUNC_MAGIC_DEF("getOwnPropertyDescriptor", 2, js_object_getOwnPropertyDescriptor, 1 ),
    JS_CFUNC_MAGIC_DEF("getPrototypeOf", 1, js_object_getPrototypeOf, 1 ),
    JS_CFUNC_DEF("has", 2, js_reflect_has ),
    JS_CFUNC_MAGIC_DEF("isExtensible", 1, js_object_isExtensible, 1 ),
    JS_CFUNC_DEF("ownKeys", 1, js_reflect_ownKeys ),
    JS_CFUNC_MAGIC_DEF("preventExtensions", 1, js_object_preventExtensions, 1 ),
    JS_CFUNC_DEF("set", 3, js_reflect_set ),
    JS_CFUNC_DEF("setPrototypeOf", 2, js_reflect_setPrototypeOf ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "Reflect", JS_PROP_CONFIGURABLE ),
};

static const JSCFunctionListEntry js_reflect_obj[] = {
    JS_OBJECT_DEF("Reflect", js_reflect_funcs, countof(js_reflect_funcs), JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE ),
};

/* Proxy */

static void js_proxy_finalizer(JSRuntime *rt, JSValue val)
{
    auto s = (JSProxyData*) JS_GetOpaque(val, JS_CLASS_PROXY);
    if (s) {
        JS_FreeValueRT(rt, s->target);
        JS_FreeValueRT(rt, s->handler);
        js_free_rt(rt, s);
    }
}

static void js_proxy_mark(JSRuntime *rt, JSValueConst val,
                          JS_MarkFunc *mark_func)
{
    auto s = (JSProxyData*) JS_GetOpaque(val, JS_CLASS_PROXY);
    if (s) {
        JS_MarkValue(rt, s->target, mark_func);
        JS_MarkValue(rt, s->handler, mark_func);
    }
}

static JSValue JS_ThrowTypeErrorRevokedProxy(JSContext *ctx)
{
    return JS_ThrowTypeError(ctx, "revoked proxy");
}

static JSProxyData *get_proxy_method(JSContext *ctx, JSValue *pmethod,
                                     JSValueConst obj, JSAtom name)
{
    auto s = (JSProxyData*) JS_GetOpaque(obj, JS_CLASS_PROXY);
    JSValue method;

    /* safer to test recursion in all proxy methods */
    if (js_check_stack_overflow(ctx->rt, 0)) {
        JS_ThrowStackOverflow(ctx);
        return NULL;
    }

    /* 's' should never be NULL */
    if (s->is_revoked) {
        JS_ThrowTypeErrorRevokedProxy(ctx);
        return NULL;
    }
    method = JS_GetProperty(ctx, s->handler, name);
    if (JS_IsException(method))
        return NULL;
    if (JS_IsNull(method))
        method = JS_UNDEFINED;
    *pmethod = method;
    return s;
}

static JSValue js_proxy_getPrototypeOf(JSContext *ctx, JSValueConst obj)
{
    JSProxyData *s;
    JSValue method, ret, proto1;
    int res;

    s = get_proxy_method(ctx, &method, obj, JS_ATOM_getPrototypeOf);
    if (!s)
        return JS_EXCEPTION;
    if (JS_IsUndefined(method))
        return JS_GetPrototype(ctx, s->target);
    ret = JS_CallFree(ctx, method, s->handler, 1, (JSValueConst *)&s->target);
    if (JS_IsException(ret))
        return ret;
    if (JS_VALUE_GET_TAG(ret) != JS_TAG_NULL &&
        JS_VALUE_GET_TAG(ret) != JS_TAG_OBJECT) {
        goto fail;
    }
    res = JS_IsExtensible(ctx, s->target);
    if (res < 0) {
        JS_FreeValue(ctx, ret);
        return JS_EXCEPTION;
    }
    if (!res) {
        /* check invariant */
        proto1 = JS_GetPrototype(ctx, s->target);
        if (JS_IsException(proto1)) {
            JS_FreeValue(ctx, ret);
            return JS_EXCEPTION;
        }
        if (JS_VALUE_GET_OBJ(proto1) != JS_VALUE_GET_OBJ(ret)) {
            JS_FreeValue(ctx, proto1);
        fail:
            JS_FreeValue(ctx, ret);
            return JS_ThrowTypeError(ctx, "proxy: inconsistent prototype");
        }
        JS_FreeValue(ctx, proto1);
    }
    return ret;
}

static int js_proxy_setPrototypeOf(JSContext *ctx, JSValueConst obj,
                                   JSValueConst proto_val, BOOL throw_flag)
{
    JSProxyData *s;
    JSValue method, ret, proto1;
    JSValueConst args[2];
    BOOL res;
    int res2;

    s = get_proxy_method(ctx, &method, obj, JS_ATOM_setPrototypeOf);
    if (!s)
        return -1;
    if (JS_IsUndefined(method))
        return JS_SetPrototypeInternal(ctx, s->target, proto_val, throw_flag);
    args[0] = s->target;
    args[1] = proto_val;
    ret = JS_CallFree(ctx, method, s->handler, 2, args);
    if (JS_IsException(ret))
        return -1;
    res = JS_ToBoolFree(ctx, ret);
    if (!res) {
        if (throw_flag) {
            JS_ThrowTypeError(ctx, "proxy: bad prototype");
            return -1;
        } else {
            return FALSE;
        }
    }
    res2 = JS_IsExtensible(ctx, s->target);
    if (res2 < 0)
        return -1;
    if (!res2) {
        proto1 = JS_GetPrototype(ctx, s->target);
        if (JS_IsException(proto1))
            return -1;
        if (JS_VALUE_GET_OBJ(proto_val) != JS_VALUE_GET_OBJ(proto1)) {
            JS_FreeValue(ctx, proto1);
            JS_ThrowTypeError(ctx, "proxy: inconsistent prototype");
            return -1;
        }
        JS_FreeValue(ctx, proto1);
    }
    return TRUE;
}

static int js_proxy_isExtensible(JSContext *ctx, JSValueConst obj)
{
    JSProxyData *s;
    JSValue method, ret;
    BOOL res;
    int res2;

    s = get_proxy_method(ctx, &method, obj, JS_ATOM_isExtensible);
    if (!s)
        return -1;
    if (JS_IsUndefined(method))
        return JS_IsExtensible(ctx, s->target);
    ret = JS_CallFree(ctx, method, s->handler, 1, (JSValueConst *)&s->target);
    if (JS_IsException(ret))
        return -1;
    res = JS_ToBoolFree(ctx, ret);
    res2 = JS_IsExtensible(ctx, s->target);
    if (res2 < 0)
        return res2;
    if (res != res2) {
        JS_ThrowTypeError(ctx, "proxy: inconsistent isExtensible");
        return -1;
    }
    return res;
}

static int js_proxy_preventExtensions(JSContext *ctx, JSValueConst obj)
{
    JSProxyData *s;
    JSValue method, ret;
    BOOL res;
    int res2;

    s = get_proxy_method(ctx, &method, obj, JS_ATOM_preventExtensions);
    if (!s)
        return -1;
    if (JS_IsUndefined(method))
        return JS_PreventExtensions(ctx, s->target);
    ret = JS_CallFree(ctx, method, s->handler, 1, (JSValueConst *)&s->target);
    if (JS_IsException(ret))
        return -1;
    res = JS_ToBoolFree(ctx, ret);
    if (res) {
        res2 = JS_IsExtensible(ctx, s->target);
        if (res2 < 0)
            return res2;
        if (res2) {
            JS_ThrowTypeError(ctx, "proxy: inconsistent preventExtensions");
            return -1;
        }
    }
    return res;
}

static int js_proxy_has(JSContext *ctx, JSValueConst obj, JSAtom atom)
{
    JSProxyData *s;
    JSValue method, ret1, atom_val;
    int ret, res;
    JSObject *p;
    JSValueConst args[2];
    BOOL res2;

    s = get_proxy_method(ctx, &method, obj, JS_ATOM_has);
    if (!s)
        return -1;
    if (JS_IsUndefined(method))
        return JS_HasProperty(ctx, s->target, atom);
    atom_val = JS_AtomToValue(ctx, atom);
    if (JS_IsException(atom_val)) {
        JS_FreeValue(ctx, method);
        return -1;
    }
    args[0] = s->target;
    args[1] = atom_val;
    ret1 = JS_CallFree(ctx, method, s->handler, 2, args);
    JS_FreeValue(ctx, atom_val);
    if (JS_IsException(ret1))
        return -1;
    ret = JS_ToBoolFree(ctx, ret1);
    if (!ret) {
        JSPropertyDescriptor desc;
        p = JS_VALUE_GET_OBJ(s->target);
        res = JS_GetOwnPropertyInternal(ctx, &desc, p, atom);
        if (res < 0)
            return -1;
        if (res) {
            res2 = !(desc.flags & JS_PROP_CONFIGURABLE);
            js_free_desc(ctx, &desc);
            if (res2 || !p->extensible) {
                JS_ThrowTypeError(ctx, "proxy: inconsistent has");
                return -1;
            }
        }
    }
    return ret;
}

static JSValue js_proxy_get(JSContext *ctx, JSValueConst obj, JSAtom atom,
                            JSValueConst receiver)
{
    JSProxyData *s;
    JSValue method, ret, atom_val;
    int res;
    JSValueConst args[3];
    JSPropertyDescriptor desc;

    s = get_proxy_method(ctx, &method, obj, JS_ATOM_get);
    if (!s)
        return JS_EXCEPTION;
    /* Note: recursion is possible thru the prototype of s->target */
    if (JS_IsUndefined(method))
        return JS_GetPropertyInternal(ctx, s->target, atom, receiver, FALSE);
    atom_val = JS_AtomToValue(ctx, atom);
    if (JS_IsException(atom_val)) {
        JS_FreeValue(ctx, method);
        return JS_EXCEPTION;
    }
    args[0] = s->target;
    args[1] = atom_val;
    args[2] = receiver;
    ret = JS_CallFree(ctx, method, s->handler, 3, args);
    JS_FreeValue(ctx, atom_val);
    if (JS_IsException(ret))
        return JS_EXCEPTION;
    res = JS_GetOwnPropertyInternal(ctx, &desc, JS_VALUE_GET_OBJ(s->target), atom);
    if (res < 0)
        return JS_EXCEPTION;
    if (res) {
        if ((desc.flags & (JS_PROP_GETSET | JS_PROP_CONFIGURABLE | JS_PROP_WRITABLE)) == 0) {
            if (!js_same_value(ctx, desc.value, ret)) {
                goto fail;
            }
        } else if ((desc.flags & (JS_PROP_GETSET | JS_PROP_CONFIGURABLE)) == JS_PROP_GETSET) {
            if (JS_IsUndefined(desc.getter) && !JS_IsUndefined(ret)) {
            fail:
                js_free_desc(ctx, &desc);
                JS_FreeValue(ctx, ret);
                return JS_ThrowTypeError(ctx, "proxy: inconsistent get");
            }
        }
        js_free_desc(ctx, &desc);
    }
    return ret;
}

static int js_proxy_set(JSContext *ctx, JSValueConst obj, JSAtom atom,
                        JSValueConst value, JSValueConst receiver, int flags)
{
    JSProxyData *s;
    JSValue method, ret1, atom_val;
    int ret, res;
    JSValueConst args[4];

    s = get_proxy_method(ctx, &method, obj, JS_ATOM_set);
    if (!s)
        return -1;
    if (JS_IsUndefined(method)) {
        return JS_SetPropertyGeneric(ctx, s->target, atom,
                                     JS_DupValue(ctx, value), receiver,
                                     flags);
    }
    atom_val = JS_AtomToValue(ctx, atom);
    if (JS_IsException(atom_val)) {
        JS_FreeValue(ctx, method);
        return -1;
    }
    args[0] = s->target;
    args[1] = atom_val;
    args[2] = value;
    args[3] = receiver;
    ret1 = JS_CallFree(ctx, method, s->handler, 4, args);
    JS_FreeValue(ctx, atom_val);
    if (JS_IsException(ret1))
        return -1;
    ret = JS_ToBoolFree(ctx, ret1);
    if (ret) {
        JSPropertyDescriptor desc;
        res = JS_GetOwnPropertyInternal(ctx, &desc, JS_VALUE_GET_OBJ(s->target), atom);
        if (res < 0)
            return -1;
        if (res) {
            if ((desc.flags & (JS_PROP_GETSET | JS_PROP_CONFIGURABLE | JS_PROP_WRITABLE)) == 0) {
                if (!js_same_value(ctx, desc.value, value)) {
                    goto fail;
                }
            } else if ((desc.flags & (JS_PROP_GETSET | JS_PROP_CONFIGURABLE)) == JS_PROP_GETSET && JS_IsUndefined(desc.setter)) {
                fail:
                    js_free_desc(ctx, &desc);
                    JS_ThrowTypeError(ctx, "proxy: inconsistent set");
                    return -1;
            }
            js_free_desc(ctx, &desc);
        }
    } else {
        if ((flags & JS_PROP_THROW) ||
            ((flags & JS_PROP_THROW_STRICT) && is_strict_mode(ctx))) {
            JS_ThrowTypeError(ctx, "proxy: cannot set property");
            return -1;
        }
    }
    return ret;
}

static JSValue js_create_desc(JSContext *ctx, JSValueConst val,
                              JSValueConst getter, JSValueConst setter,
                              int flags)
{
    JSValue ret;
    ret = JS_NewObject(ctx);
    if (JS_IsException(ret))
        return ret;
    if (flags & JS_PROP_HAS_GET) {
        JS_DefinePropertyValue(ctx, ret, JS_ATOM_get, JS_DupValue(ctx, getter),
                               JS_PROP_C_W_E);
    }
    if (flags & JS_PROP_HAS_SET) {
        JS_DefinePropertyValue(ctx, ret, JS_ATOM_set, JS_DupValue(ctx, setter),
                               JS_PROP_C_W_E);
    }
    if (flags & JS_PROP_HAS_VALUE) {
        JS_DefinePropertyValue(ctx, ret, JS_ATOM_value, JS_DupValue(ctx, val),
                               JS_PROP_C_W_E);
    }
    if (flags & JS_PROP_HAS_WRITABLE) {
        JS_DefinePropertyValue(ctx, ret, JS_ATOM_writable,
                               JS_NewBool(ctx, (flags & JS_PROP_WRITABLE) != 0),
                               JS_PROP_C_W_E);
    }
    if (flags & JS_PROP_HAS_ENUMERABLE) {
        JS_DefinePropertyValue(ctx, ret, JS_ATOM_enumerable,
                               JS_NewBool(ctx, (flags & JS_PROP_ENUMERABLE) != 0),
                               JS_PROP_C_W_E);
    }
    if (flags & JS_PROP_HAS_CONFIGURABLE) {
        JS_DefinePropertyValue(ctx, ret, JS_ATOM_configurable,
                               JS_NewBool(ctx, (flags & JS_PROP_CONFIGURABLE) != 0),
                               JS_PROP_C_W_E);
    }
    return ret;
}

static int js_proxy_get_own_property(JSContext *ctx, JSPropertyDescriptor *pdesc,
                                     JSValueConst obj, JSAtom prop)
{
    JSProxyData *s;
    JSValue method, trap_result_obj, prop_val;
    int res, target_desc_ret, ret;
    JSObject *p;
    JSValueConst args[2];
    JSPropertyDescriptor result_desc, target_desc;

    s = get_proxy_method(ctx, &method, obj, JS_ATOM_getOwnPropertyDescriptor);
    if (!s)
        return -1;
    p = JS_VALUE_GET_OBJ(s->target);
    if (JS_IsUndefined(method)) {
        return JS_GetOwnPropertyInternal(ctx, pdesc, p, prop);
    }
    prop_val = JS_AtomToValue(ctx, prop);
    if (JS_IsException(prop_val)) {
        JS_FreeValue(ctx, method);
        return -1;
    }
    args[0] = s->target;
    args[1] = prop_val;
    trap_result_obj = JS_CallFree(ctx, method, s->handler, 2, args);
    JS_FreeValue(ctx, prop_val);
    if (JS_IsException(trap_result_obj))
        return -1;
    if (!JS_IsObject(trap_result_obj) && !JS_IsUndefined(trap_result_obj)) {
        JS_FreeValue(ctx, trap_result_obj);
        goto fail;
    }
    target_desc_ret = JS_GetOwnPropertyInternal(ctx, &target_desc, p, prop);
    if (target_desc_ret < 0) {
        JS_FreeValue(ctx, trap_result_obj);
        return -1;
    }
    if (target_desc_ret)
        js_free_desc(ctx, &target_desc);
    if (JS_IsUndefined(trap_result_obj)) {
        if (target_desc_ret) {
            if (!(target_desc.flags & JS_PROP_CONFIGURABLE) || !p->extensible)
                goto fail;
        }
        ret = FALSE;
    } else {
        int flags1, extensible_target;
        extensible_target = JS_IsExtensible(ctx, s->target);
        if (extensible_target < 0) {
            JS_FreeValue(ctx, trap_result_obj);
            return -1;
        }
        res = js_obj_to_desc(ctx, &result_desc, trap_result_obj);
        JS_FreeValue(ctx, trap_result_obj);
        if (res < 0)
            return -1;

        if (target_desc_ret) {
            /* convert result_desc.flags to defineProperty flags */
            flags1 = result_desc.flags | JS_PROP_HAS_CONFIGURABLE | JS_PROP_HAS_ENUMERABLE;
            if (result_desc.flags & JS_PROP_GETSET)
                flags1 |= JS_PROP_HAS_GET | JS_PROP_HAS_SET;
            else
                flags1 |= JS_PROP_HAS_VALUE | JS_PROP_HAS_WRITABLE;
            /* XXX: not complete check: need to compare value &
               getter/setter as in defineproperty */
            if (!check_define_prop_flags(target_desc.flags, flags1))
                goto fail1;
        } else {
            if (!extensible_target)
                goto fail1;
        }
        if (!(result_desc.flags & JS_PROP_CONFIGURABLE)) {
            if (!target_desc_ret || (target_desc.flags & JS_PROP_CONFIGURABLE))
                goto fail1;
            if ((result_desc.flags &
                 (JS_PROP_GETSET | JS_PROP_WRITABLE)) == 0 &&
                target_desc_ret &&
                (target_desc.flags & JS_PROP_WRITABLE) != 0) {
                /* proxy-missing-checks */
            fail1:
                js_free_desc(ctx, &result_desc);
            fail:
                JS_ThrowTypeError(ctx, "proxy: inconsistent getOwnPropertyDescriptor");
                return -1;
            }
        }
        ret = TRUE;
        if (pdesc) {
            *pdesc = result_desc;
        } else {
            js_free_desc(ctx, &result_desc);
        }
    }
    return ret;
}

static int js_proxy_define_own_property(JSContext *ctx, JSValueConst obj,
                                        JSAtom prop, JSValueConst val,
                                        JSValueConst getter, JSValueConst setter,
                                        int flags)
{
    JSProxyData *s;
    JSValue method, ret1, prop_val, desc_val;
    int res, ret;
    JSObject *p;
    JSValueConst args[3];
    JSPropertyDescriptor desc;
    BOOL setting_not_configurable;

    s = get_proxy_method(ctx, &method, obj, JS_ATOM_defineProperty);
    if (!s)
        return -1;
    if (JS_IsUndefined(method)) {
        return JS_DefineProperty(ctx, s->target, prop, val, getter, setter, flags);
    }
    prop_val = JS_AtomToValue(ctx, prop);
    if (JS_IsException(prop_val)) {
        JS_FreeValue(ctx, method);
        return -1;
    }
    desc_val = js_create_desc(ctx, val, getter, setter, flags);
    if (JS_IsException(desc_val)) {
        JS_FreeValue(ctx, prop_val);
        JS_FreeValue(ctx, method);
        return -1;
    }
    args[0] = s->target;
    args[1] = prop_val;
    args[2] = desc_val;
    ret1 = JS_CallFree(ctx, method, s->handler, 3, args);
    JS_FreeValue(ctx, prop_val);
    JS_FreeValue(ctx, desc_val);
    if (JS_IsException(ret1))
        return -1;
    ret = JS_ToBoolFree(ctx, ret1);
    if (!ret) {
        if (flags & JS_PROP_THROW) {
            JS_ThrowTypeError(ctx, "proxy: defineProperty exception");
            return -1;
        } else {
            return 0;
        }
    }
    p = JS_VALUE_GET_OBJ(s->target);
    res = JS_GetOwnPropertyInternal(ctx, &desc, p, prop);
    if (res < 0)
        return -1;
    setting_not_configurable = ((flags & (JS_PROP_HAS_CONFIGURABLE |
                                          JS_PROP_CONFIGURABLE)) ==
                                JS_PROP_HAS_CONFIGURABLE);
    if (!res) {
        if (!p->extensible || setting_not_configurable)
            goto fail;
    } else {
        if (!check_define_prop_flags(desc.flags, flags) ||
            ((desc.flags & JS_PROP_CONFIGURABLE) && setting_not_configurable)) {
            goto fail1;
        }
        if (flags & (JS_PROP_HAS_GET | JS_PROP_HAS_SET)) {
            if ((desc.flags & (JS_PROP_GETSET | JS_PROP_CONFIGURABLE)) ==
                JS_PROP_GETSET) {
                if ((flags & JS_PROP_HAS_GET) &&
                    !js_same_value(ctx, getter, desc.getter)) {
                    goto fail1;
                }
                if ((flags & JS_PROP_HAS_SET) &&
                    !js_same_value(ctx, setter, desc.setter)) {
                    goto fail1;
                }
            }
        } else if (flags & JS_PROP_HAS_VALUE) {
            if ((desc.flags & (JS_PROP_CONFIGURABLE | JS_PROP_WRITABLE)) ==
                JS_PROP_WRITABLE && !(flags & JS_PROP_WRITABLE)) {
                /* missing-proxy-check feature */
                goto fail1;
            } else if ((desc.flags & (JS_PROP_CONFIGURABLE | JS_PROP_WRITABLE)) == 0 &&
                !js_same_value(ctx, val, desc.value)) {
                goto fail1;
            }
        }
        if (flags & JS_PROP_HAS_WRITABLE) {
            if ((desc.flags & (JS_PROP_GETSET | JS_PROP_CONFIGURABLE |
                               JS_PROP_WRITABLE)) == JS_PROP_WRITABLE) {
                /* proxy-missing-checks */
            fail1:
                js_free_desc(ctx, &desc);
            fail:
                JS_ThrowTypeError(ctx, "proxy: inconsistent defineProperty");
                return -1;
            }
        }
        js_free_desc(ctx, &desc);
    }
    return 1;
}

static int js_proxy_delete_property(JSContext *ctx, JSValueConst obj,
                                    JSAtom atom)
{
    JSProxyData *s;
    JSValue method, ret, atom_val;
    int res, res2, is_extensible;
    JSValueConst args[2];

    s = get_proxy_method(ctx, &method, obj, JS_ATOM_deleteProperty);
    if (!s)
        return -1;
    if (JS_IsUndefined(method)) {
        return JS_DeleteProperty(ctx, s->target, atom, 0);
    }
    atom_val = JS_AtomToValue(ctx, atom);;
    if (JS_IsException(atom_val)) {
        JS_FreeValue(ctx, method);
        return -1;
    }
    args[0] = s->target;
    args[1] = atom_val;
    ret = JS_CallFree(ctx, method, s->handler, 2, args);
    JS_FreeValue(ctx, atom_val);
    if (JS_IsException(ret))
        return -1;
    res = JS_ToBoolFree(ctx, ret);
    if (res) {
        JSPropertyDescriptor desc;
        res2 = JS_GetOwnPropertyInternal(ctx, &desc, JS_VALUE_GET_OBJ(s->target), atom);
        if (res2 < 0)
            return -1;
        if (res2) {
            if (!(desc.flags & JS_PROP_CONFIGURABLE))
                goto fail;
            is_extensible = JS_IsExtensible(ctx, s->target);
            if (is_extensible < 0)
                goto fail1;
            if (!is_extensible) {
                /* proxy-missing-checks */
            fail:
                JS_ThrowTypeError(ctx, "proxy: inconsistent deleteProperty");
            fail1:
                js_free_desc(ctx, &desc);
                return -1;
            }
            js_free_desc(ctx, &desc);
        }
    }
    return res;
}

/* return the index of the property or -1 if not found */
static int find_prop_key(const JSPropertyEnum *tab, int n, JSAtom atom)
{
    int i;
    for(i = 0; i < n; i++) {
        if (tab[i].atom == atom)
            return i;
    }
    return -1;
}

static int js_proxy_get_own_property_names(JSContext *ctx,
                                           JSPropertyEnum **ptab,
                                           uint32_t *plen,
                                           JSValueConst obj)
{
    JSProxyData *s;
    JSValue method, prop_array, val;
    uint32_t len, i, len2;
    JSPropertyEnum *tab, *tab2;
    JSAtom atom;
    JSPropertyDescriptor desc;
    int res, is_extensible, idx;

    s = get_proxy_method(ctx, &method, obj, JS_ATOM_ownKeys);
    if (!s)
        return -1;
    if (JS_IsUndefined(method)) {
        return JS_GetOwnPropertyNamesInternal(ctx, ptab, plen,
                                      JS_VALUE_GET_OBJ(s->target),
                                      JS_GPN_STRING_MASK | JS_GPN_SYMBOL_MASK);
    }
    prop_array = JS_CallFree(ctx, method, s->handler, 1, (JSValueConst *)&s->target);
    if (JS_IsException(prop_array))
        return -1;
    tab = NULL;
    len = 0;
    tab2 = NULL;
    len2 = 0;
    if (js_get_length32(ctx, &len, prop_array))
        goto fail;
    if (len > 0) {
        tab = (JSPropertyEnum*) js_mallocz(ctx, sizeof(tab[0]) * len);
        if (!tab)
            goto fail;
    }
    for(i = 0; i < len; i++) {
        val = JS_GetPropertyUint32(ctx, prop_array, i);
        if (JS_IsException(val))
            goto fail;
        if (!JS_IsString(val) && !JS_IsSymbol(val)) {
            JS_FreeValue(ctx, val);
            JS_ThrowTypeError(ctx, "proxy: properties must be strings or symbols");
            goto fail;
        }
        atom = JS_ValueToAtom(ctx, val);
        JS_FreeValue(ctx, val);
        if (atom == JS_ATOM_NULL)
            goto fail;
        tab[i].atom = atom;
        tab[i].is_enumerable = FALSE; /* XXX: redundant? */
    }

    /* check duplicate properties (XXX: inefficient, could store the
     * properties an a temporary object to use the hash) */
    for(i = 1; i < len; i++) {
        if (find_prop_key(tab, i, tab[i].atom) >= 0) {
            JS_ThrowTypeError(ctx, "proxy: duplicate property");
            goto fail;
        }
    }

    is_extensible = JS_IsExtensible(ctx, s->target);
    if (is_extensible < 0)
        goto fail;

    /* check if there are non configurable properties */
    if (s->is_revoked) {
        JS_ThrowTypeErrorRevokedProxy(ctx);
        goto fail;
    }
    if (JS_GetOwnPropertyNamesInternal(ctx, &tab2, &len2, JS_VALUE_GET_OBJ(s->target),
                               JS_GPN_STRING_MASK | JS_GPN_SYMBOL_MASK))
        goto fail;
    for(i = 0; i < len2; i++) {
        if (s->is_revoked) {
            JS_ThrowTypeErrorRevokedProxy(ctx);
            goto fail;
        }
        res = JS_GetOwnPropertyInternal(ctx, &desc, JS_VALUE_GET_OBJ(s->target),
                                tab2[i].atom);
        if (res < 0)
            goto fail;
        if (res) {  /* safety, property should be found */
            js_free_desc(ctx, &desc);
            if (!(desc.flags & JS_PROP_CONFIGURABLE) || !is_extensible) {
                idx = find_prop_key(tab, len, tab2[i].atom);
                if (idx < 0) {
                    JS_ThrowTypeError(ctx, "proxy: target property must be present in proxy ownKeys");
                    goto fail;
                }
                /* mark the property as found */
                if (!is_extensible)
                    tab[idx].is_enumerable = TRUE;
            }
        }
    }
    if (!is_extensible) {
        /* check that all property in 'tab' were checked */
        for(i = 0; i < len; i++) {
            if (!tab[i].is_enumerable) {
                JS_ThrowTypeError(ctx, "proxy: property not present in target were returned by non extensible proxy");
                goto fail;
            }
        }
    }

    js_free_prop_enum(ctx, tab2, len2);
    JS_FreeValue(ctx, prop_array);
    *ptab = tab;
    *plen = len;
    return 0;
 fail:
    js_free_prop_enum(ctx, tab2, len2);
    js_free_prop_enum(ctx, tab, len);
    JS_FreeValue(ctx, prop_array);
    return -1;
}

static JSValue js_proxy_call_constructor(JSContext *ctx, JSValueConst func_obj,
                                         JSValueConst new_target,
                                         int argc, JSValueConst *argv)
{
    JSProxyData *s;
    JSValue method, arg_array, ret;
    JSValueConst args[3];

    s = get_proxy_method(ctx, &method, func_obj, JS_ATOM_construct);
    if (!s)
        return JS_EXCEPTION;
    if (!JS_IsConstructor(ctx, s->target))
        return JS_ThrowTypeError(ctx, "not a constructor");
    if (JS_IsUndefined(method))
        return JS_CallConstructor2(ctx, s->target, new_target, argc, argv);
    arg_array = js_create_array(ctx, argc, argv);
    if (JS_IsException(arg_array)) {
        ret = JS_EXCEPTION;
        goto fail;
    }
    args[0] = s->target;
    args[1] = arg_array;
    args[2] = new_target;
    ret = JS_Call(ctx, method, s->handler, 3, args);
    if (!JS_IsException(ret) && JS_VALUE_GET_TAG(ret) != JS_TAG_OBJECT) {
        JS_FreeValue(ctx, ret);
        ret = JS_ThrowTypeErrorNotAnObject(ctx);
    }
 fail:
    JS_FreeValue(ctx, method);
    JS_FreeValue(ctx, arg_array);
    return ret;
}

static JSValue js_proxy_call(JSContext *ctx, JSValueConst func_obj,
                             JSValueConst this_obj,
                             int argc, JSValueConst *argv, int flags)
{
    JSProxyData *s;
    JSValue method, arg_array, ret;
    JSValueConst args[3];

    if (flags & JS_CALL_FLAG_CONSTRUCTOR)
        return js_proxy_call_constructor(ctx, func_obj, this_obj, argc, argv);

    s = get_proxy_method(ctx, &method, func_obj, JS_ATOM_apply);
    if (!s)
        return JS_EXCEPTION;
    if (!s->is_func) {
        JS_FreeValue(ctx, method);
        return JS_ThrowTypeError(ctx, "not a function");
    }
    if (JS_IsUndefined(method))
        return JS_Call(ctx, s->target, this_obj, argc, argv);
    arg_array = js_create_array(ctx, argc, argv);
    if (JS_IsException(arg_array)) {
        ret = JS_EXCEPTION;
        goto fail;
    }
    args[0] = s->target;
    args[1] = this_obj;
    args[2] = arg_array;
    ret = JS_Call(ctx, method, s->handler, 3, args);
 fail:
    JS_FreeValue(ctx, method);
    JS_FreeValue(ctx, arg_array);
    return ret;
}

static int js_proxy_isArray(JSContext *ctx, JSValueConst obj)
{
    auto s = (JSProxyData*) JS_GetOpaque(obj, JS_CLASS_PROXY);
    if (!s)
        return FALSE;
    if (s->is_revoked) {
        JS_ThrowTypeErrorRevokedProxy(ctx);
        return -1;
    }
    return JS_IsArray(ctx, s->target);
}

static constexpr const JSClassExoticMethods js_proxy_exotic_methods = {
    js_proxy_get_own_property,
    js_proxy_get_own_property_names,
    js_proxy_delete_property,
    js_proxy_define_own_property,
    js_proxy_has,
    js_proxy_get,
    js_proxy_set
};

static JSValue js_proxy_constructor(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    JSValueConst target, handler;
    JSValue obj;
    JSProxyData *s;

    target = argv[0];
    handler = argv[1];
    if (JS_VALUE_GET_TAG(target) != JS_TAG_OBJECT ||
        JS_VALUE_GET_TAG(handler) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);

    obj = JS_NewObjectProtoClass(ctx, JS_NULL, JS_CLASS_PROXY);
    if (JS_IsException(obj))
        return obj;
    s = (JSProxyData*) js_malloc(ctx, sizeof(JSProxyData));
    if (!s) {
        JS_FreeValue(ctx, obj);
        return JS_EXCEPTION;
    }
    s->target = JS_DupValue(ctx, target);
    s->handler = JS_DupValue(ctx, handler);
    s->is_func = JS_IsFunction(ctx, target);
    s->is_revoked = FALSE;
    JS_SetOpaque(obj, s);
    JS_SetConstructorBit(ctx, obj, JS_IsConstructor(ctx, target));
    return obj;
}

static JSValue js_proxy_revoke(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv, int magic,
                               JSValue *func_data)
{
    auto s = (JSProxyData*) JS_GetOpaque(func_data[0], JS_CLASS_PROXY);
    if (s) {
        /* We do not free the handler and target in case they are
           referenced as constants in the C call stack */
        s->is_revoked = TRUE;
        JS_FreeValue(ctx, func_data[0]);
        func_data[0] = JS_NULL;
    }
    return JS_UNDEFINED;
}

static JSValue js_proxy_revoke_constructor(JSContext *ctx,
                                           JSValueConst proxy_obj)
{
    return JS_NewCFunctionData(ctx, js_proxy_revoke, 0, 0, 1, &proxy_obj);
}

static JSValue js_proxy_revocable(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    JSValue proxy_obj, revoke_obj = JS_UNDEFINED, obj;

    proxy_obj = js_proxy_constructor(ctx, JS_UNDEFINED, argc, argv);
    if (JS_IsException(proxy_obj))
        goto fail;
    revoke_obj = js_proxy_revoke_constructor(ctx, proxy_obj);
    if (JS_IsException(revoke_obj))
        goto fail;
    obj = JS_NewObject(ctx);
    if (JS_IsException(obj))
        goto fail;
    // XXX: exceptions?
    JS_DefinePropertyValue(ctx, obj, JS_ATOM_proxy, proxy_obj, JS_PROP_C_W_E);
    JS_DefinePropertyValue(ctx, obj, JS_ATOM_revoke, revoke_obj, JS_PROP_C_W_E);
    return obj;
 fail:
    JS_FreeValue(ctx, proxy_obj);
    JS_FreeValue(ctx, revoke_obj);
    return JS_EXCEPTION;
}

static const JSCFunctionListEntry js_proxy_funcs[] = {
    JS_CFUNC_DEF("revocable", 2, js_proxy_revocable ),
};

static const JSClassShortDef js_proxy_class_def[] = {
    { JS_ATOM_Object, js_proxy_finalizer, js_proxy_mark }, /* JS_CLASS_PROXY */
};

inline void JS_AddIntrinsicProxy(JSContext *ctx)
{
    JSRuntime *rt = ctx->rt;
    JSValue obj1;

    if (!JS_IsRegisteredClass(rt, JS_CLASS_PROXY)) {
        init_class_range(rt, js_proxy_class_def, JS_CLASS_PROXY,
                         countof(js_proxy_class_def));
        rt->class_array[JS_CLASS_PROXY].exotic = &js_proxy_exotic_methods;
        rt->class_array[JS_CLASS_PROXY].call = js_proxy_call;
    }

    obj1 = JS_NewCFunction2(ctx, js_proxy_constructor, "Proxy", 2,
                            JS_CFUNC_constructor, 0);
    JS_SetConstructorBit(ctx, obj1, TRUE);
    JS_SetPropertyFunctionList(ctx, obj1, js_proxy_funcs,
                               countof(js_proxy_funcs));
    JS_DefinePropertyValueStr(ctx, ctx->global_obj, "Proxy",
                              obj1, JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
}

/* Symbol */

static JSValue js_symbol_constructor(JSContext *ctx, JSValueConst new_target,
                                     int argc, JSValueConst *argv)
{
    JSValue str;
    JSString *p;

    if (!JS_IsUndefined(new_target))
        return JS_ThrowTypeError(ctx, "not a constructor");
    if (argc == 0 || JS_IsUndefined(argv[0])) {
        p = NULL;
    } else {
        str = JS_ToString(ctx, argv[0]);
        if (JS_IsException(str))
            return JS_EXCEPTION;
        p = JS_VALUE_GET_STRING(str);
    }
    return JS_NewSymbol(ctx, p, JS_ATOM_TYPE_SYMBOL);
}

static JSValue js_thisSymbolValue(JSContext *ctx, JSValueConst this_val)
{
    if (JS_VALUE_GET_TAG(this_val) == JS_TAG_SYMBOL)
        return JS_DupValue(ctx, this_val);

    if (JS_VALUE_GET_TAG(this_val) == JS_TAG_OBJECT) {
        JSObject *p = JS_VALUE_GET_OBJ(this_val);
        if (p->class_id == JS_CLASS_SYMBOL) {
            if (JS_VALUE_GET_TAG(p->u.object_data) == JS_TAG_SYMBOL)
                return JS_DupValue(ctx, p->u.object_data);
        }
    }
    return JS_ThrowTypeError(ctx, "not a symbol");
}

static JSValue js_symbol_toString(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    JSValue val, ret;
    val = js_thisSymbolValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    /* XXX: use JS_ToStringInternal() with a flags */
    ret = js_string_constructor(ctx, JS_UNDEFINED, 1, (JSValueConst *)&val);
    JS_FreeValue(ctx, val);
    return ret;
}

static JSValue js_symbol_valueOf(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    return js_thisSymbolValue(ctx, this_val);
}

static JSValue js_symbol_get_description(JSContext *ctx, JSValueConst this_val)
{
    JSValue val, ret;
    JSAtomStruct *p;

    val = js_thisSymbolValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    p = (JSAtomStruct*) JS_VALUE_GET_PTR(val);
    if (p->len == 0 && p->is_wide_char != 0) {
        ret = JS_UNDEFINED;
    } else {
        ret = JS_AtomToString(ctx, js_get_atom_index(ctx->rt, p));
    }
    JS_FreeValue(ctx, val);
    return ret;
}

static const JSCFunctionListEntry js_symbol_proto_funcs[] = {
    JS_CFUNC_DEF("toString", 0, js_symbol_toString ),
    JS_CFUNC_DEF("valueOf", 0, js_symbol_valueOf ),
    // XXX: should have writable: false
    JS_CFUNC_DEF("[Symbol.toPrimitive]", 1, js_symbol_valueOf ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "Symbol", JS_PROP_CONFIGURABLE ),
    JS_CGETSET_DEF("description", js_symbol_get_description, NULL ),
};

static JSValue js_symbol_for(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv)
{
    JSValue str;

    str = JS_ToString(ctx, argv[0]);
    if (JS_IsException(str))
        return JS_EXCEPTION;
    return JS_NewSymbol(ctx, JS_VALUE_GET_STRING(str), JS_ATOM_TYPE_GLOBAL_SYMBOL);
}

static JSValue js_symbol_keyFor(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSAtomStruct *p;

    if (!JS_IsSymbol(argv[0]))
        return JS_ThrowTypeError(ctx, "not a symbol");
    p = (JSAtomStruct*) JS_VALUE_GET_PTR(argv[0]);
    if (p->atom_type != JS_ATOM_TYPE_GLOBAL_SYMBOL)
        return JS_UNDEFINED;
    return JS_DupValue(ctx, JS_MKPTR(JS_TAG_STRING, p));
}

static const JSCFunctionListEntry js_symbol_funcs[] = {
    JS_CFUNC_DEF("for", 1, js_symbol_for ),
    JS_CFUNC_DEF("keyFor", 1, js_symbol_keyFor ),
};

/* Set/Map/WeakSet/WeakMap */

typedef struct JSMapRecord {
    int ref_count; /* used during enumeration to avoid freeing the record */
    BOOL empty; /* TRUE if the record is deleted */
    struct JSMapState *map;
    struct JSMapRecord *next_weak_ref;
    struct list_head link;
    struct list_head hash_link;
    JSValue key;
    JSValue value;
} JSMapRecord;

typedef struct JSMapState {
    BOOL is_weak; /* TRUE if WeakSet/WeakMap */
    struct list_head records; /* list of JSMapRecord.link */
    uint32_t record_count;
    struct list_head *hash_table;
    uint32_t hash_size; /* must be a power of two */
    uint32_t record_count_threshold; /* count at which a hash table
                                        resize is needed */
} JSMapState;

#define MAGIC_SET (1 << 0)
#define MAGIC_WEAK (1 << 1)

static JSValue js_map_constructor(JSContext *ctx, JSValueConst new_target,
                                  int argc, JSValueConst *argv, int magic)
{
    JSMapState *s;
    JSValue obj, adder = JS_UNDEFINED, iter = JS_UNDEFINED, next_method = JS_UNDEFINED;
    JSValueConst arr;
    BOOL is_set, is_weak;

    is_set = magic & MAGIC_SET;
    is_weak = ((magic & MAGIC_WEAK) != 0);
    obj = js_create_from_ctor(ctx, new_target, JS_CLASS_MAP + magic);
    if (JS_IsException(obj))
        return JS_EXCEPTION;
    s = (JSMapState*) js_mallocz(ctx, sizeof(*s));
    if (!s)
        goto fail;
    init_list_head(&s->records);
    s->is_weak = is_weak;
    JS_SetOpaque(obj, s);
    s->hash_size = 1;
    s->hash_table = (struct list_head*) js_malloc(ctx, sizeof(s->hash_table[0]) * s->hash_size);
    if (!s->hash_table)
        goto fail;
    init_list_head(&s->hash_table[0]);
    s->record_count_threshold = 4;

    arr = JS_UNDEFINED;
    if (argc > 0)
        arr = argv[0];
    if (!JS_IsUndefined(arr) && !JS_IsNull(arr)) {
        JSValue item, ret;
        BOOL done;

        adder = JS_GetProperty(ctx, obj, is_set ? JS_ATOM_add : JS_ATOM_set);
        if (JS_IsException(adder))
            goto fail;
        if (!JS_IsFunction(ctx, adder)) {
            JS_ThrowTypeError(ctx, "set/add is not a function");
            goto fail;
        }

        iter = JS_GetIterator(ctx, arr, FALSE);
        if (JS_IsException(iter))
            goto fail;
        next_method = JS_GetProperty(ctx, iter, JS_ATOM_next);
        if (JS_IsException(next_method))
            goto fail;

        for(;;) {
            item = JS_IteratorNext(ctx, iter, next_method, 0, NULL, &done);
            if (JS_IsException(item))
                goto fail;
            if (done) {
                JS_FreeValue(ctx, item);
                break;
            }
            if (is_set) {
                ret = JS_Call(ctx, adder, obj, 1, (JSValueConst *)&item);
                if (JS_IsException(ret)) {
                    JS_FreeValue(ctx, item);
                    goto fail;
                }
            } else {
                JSValue key, value;
                JSValueConst args[2];
                key = JS_UNDEFINED;
                value = JS_UNDEFINED;
                if (!JS_IsObject(item)) {
                    JS_ThrowTypeErrorNotAnObject(ctx);
                    goto fail1;
                }
                key = JS_GetPropertyUint32(ctx, item, 0);
                if (JS_IsException(key))
                    goto fail1;
                value = JS_GetPropertyUint32(ctx, item, 1);
                if (JS_IsException(value))
                    goto fail1;
                args[0] = key;
                args[1] = value;
                ret = JS_Call(ctx, adder, obj, 2, args);
                if (JS_IsException(ret)) {
                fail1:
                    JS_FreeValue(ctx, item);
                    JS_FreeValue(ctx, key);
                    JS_FreeValue(ctx, value);
                    goto fail;
                }
                JS_FreeValue(ctx, key);
                JS_FreeValue(ctx, value);
            }
            JS_FreeValue(ctx, ret);
            JS_FreeValue(ctx, item);
        }
        JS_FreeValue(ctx, next_method);
        JS_FreeValue(ctx, iter);
        JS_FreeValue(ctx, adder);
    }
    return obj;
 fail:
    if (JS_IsObject(iter)) {
        /* close the iterator object, preserving pending exception */
        JS_IteratorClose(ctx, iter, TRUE);
    }
    JS_FreeValue(ctx, next_method);
    JS_FreeValue(ctx, iter);
    JS_FreeValue(ctx, adder);
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

/* XXX: could normalize strings to speed up comparison */
static JSValueConst map_normalize_key(JSContext *ctx, JSValueConst key)
{
    uint32_t tag = JS_VALUE_GET_TAG(key);
    /* convert -0.0 to +0.0 */
    if (JS_TAG_IS_FLOAT64(tag) && JS_VALUE_GET_FLOAT64(key) == 0.0) {
        key = JS_NewInt32(ctx, 0);
    }
    return key;
}

/* XXX: better hash ? */
static uint32_t map_hash_key(JSContext *ctx, JSValueConst key)
{
    uint32_t tag = JS_VALUE_GET_NORM_TAG(key);
    uint32_t h;
    double d;
    JSFloat64Union u;

    switch(tag) {
    case JS_TAG_BOOL:
        h = JS_VALUE_GET_INT(key);
        break;
    case JS_TAG_STRING:
        h = hash_string(JS_VALUE_GET_STRING(key), 0);
        break;
    case JS_TAG_OBJECT:
    case JS_TAG_SYMBOL:
        h = (uintptr_t)JS_VALUE_GET_PTR(key) * 3163;
        break;
    case JS_TAG_INT:
        d = JS_VALUE_GET_INT(key) * 3163;
        goto hash_float64;
    case JS_TAG_FLOAT64:
        d = JS_VALUE_GET_FLOAT64(key);
        /* normalize the NaN */
        if (isnan(d))
            d = JS_FLOAT64_NAN;
    hash_float64:
        u.d = d;
        h = (u.u32[0] ^ u.u32[1]) * 3163;
        break;
    default:
        h = 0; /* XXX: bignum support */
        break;
    }
    h ^= tag;
    return h;
}

static JSMapRecord *map_find_record(JSContext *ctx, JSMapState *s,
                                    JSValueConst key)
{
    struct list_head *el;
    JSMapRecord *mr;
    uint32_t h;
    h = map_hash_key(ctx, key) & (s->hash_size - 1);
    list_for_each(el, &s->hash_table[h]) {
        mr = list_entry(el, JSMapRecord, hash_link);
        if (js_same_value_zero(ctx, mr->key, key))
            return mr;
    }
    return NULL;
}

static void map_hash_resize(JSContext *ctx, JSMapState *s)
{
    uint32_t new_hash_size, i, h;
    size_t slack;
    struct list_head *new_hash_table, *el;
    JSMapRecord *mr;

    /* XXX: no reporting of memory allocation failure */
    if (s->hash_size == 1)
        new_hash_size = 4;
    else
        new_hash_size = s->hash_size * 2;
    new_hash_table = (struct list_head*) js_realloc2(ctx, s->hash_table,
                                 sizeof(new_hash_table[0]) * new_hash_size, &slack);
    if (!new_hash_table)
        return;
    new_hash_size += slack / sizeof(*new_hash_table);

    for(i = 0; i < new_hash_size; i++)
        init_list_head(&new_hash_table[i]);

    list_for_each(el, &s->records) {
        mr = list_entry(el, JSMapRecord, link);
        if (!mr->empty) {
            h = map_hash_key(ctx, mr->key) & (new_hash_size - 1);
            list_add_tail(&mr->hash_link, &new_hash_table[h]);
        }
    }
    s->hash_table = new_hash_table;
    s->hash_size = new_hash_size;
    s->record_count_threshold = new_hash_size * 2;
}

static JSMapRecord *map_add_record(JSContext *ctx, JSMapState *s,
                                   JSValueConst key)
{
    uint32_t h;
    JSMapRecord *mr;

    mr = (JSMapRecord*) js_malloc(ctx, sizeof(*mr));
    if (!mr)
        return NULL;
    mr->ref_count = 1;
    mr->map = s;
    mr->empty = FALSE;
    if (s->is_weak) {
        JSObject *p = JS_VALUE_GET_OBJ(key);
        /* Add the weak reference */
        mr->next_weak_ref = p->first_weak_ref;
        p->first_weak_ref = mr;
    } else {
        JS_DupValue(ctx, key);
    }
    mr->key = (JSValue)key;
    h = map_hash_key(ctx, key) & (s->hash_size - 1);
    list_add_tail(&mr->hash_link, &s->hash_table[h]);
    list_add_tail(&mr->link, &s->records);
    s->record_count++;
    if (s->record_count >= s->record_count_threshold) {
        map_hash_resize(ctx, s);
    }
    return mr;
}

/* Remove the weak reference from the object weak
   reference list. we don't use a doubly linked list to
   save space, assuming a given object has few weak
       references to it */
static void delete_weak_ref(JSRuntime *rt, JSMapRecord *mr)
{
    JSMapRecord **pmr, *mr1;
    JSObject *p;

    p = JS_VALUE_GET_OBJ(mr->key);
    pmr = &p->first_weak_ref;
    for(;;) {
        mr1 = *pmr;
        assert(mr1 != NULL);
        if (mr1 == mr)
            break;
        pmr = &mr1->next_weak_ref;
    }
    *pmr = mr1->next_weak_ref;
}

static void map_delete_record(JSRuntime *rt, JSMapState *s, JSMapRecord *mr)
{
    if (mr->empty)
        return;
    list_del(&mr->hash_link);
    if (s->is_weak) {
        delete_weak_ref(rt, mr);
    } else {
        JS_FreeValueRT(rt, mr->key);
    }
    JS_FreeValueRT(rt, mr->value);
    if (--mr->ref_count == 0) {
        list_del(&mr->link);
        js_free_rt(rt, mr);
    } else {
        /* keep a zombie record for iterators */
        mr->empty = TRUE;
        mr->key = JS_UNDEFINED;
        mr->value = JS_UNDEFINED;
    }
    s->record_count--;
}

static void map_decref_record(JSRuntime *rt, JSMapRecord *mr)
{
    if (--mr->ref_count == 0) {
        /* the record can be safely removed */
        assert(mr->empty);
        list_del(&mr->link);
        js_free_rt(rt, mr);
    }
}

static void reset_weak_ref(JSRuntime *rt, JSObject *p)
{
    JSMapRecord *mr, *mr_next;
    JSMapState *s;

    /* first pass to remove the records from the WeakMap/WeakSet
       lists */
    for(mr = p->first_weak_ref; mr != NULL; mr = mr->next_weak_ref) {
        s = mr->map;
        assert(s->is_weak);
        assert(!mr->empty); /* no iterator on WeakMap/WeakSet */
        list_del(&mr->hash_link);
        list_del(&mr->link);
    }

    /* second pass to free the values to avoid modifying the weak
       reference list while traversing it. */
    for(mr = p->first_weak_ref; mr != NULL; mr = mr_next) {
        mr_next = mr->next_weak_ref;
        JS_FreeValueRT(rt, mr->value);
        js_free_rt(rt, mr);
    }

    p->first_weak_ref = NULL; /* fail safe */
}

static JSValue js_map_set(JSContext *ctx, JSValueConst this_val,
                          int argc, JSValueConst *argv, int magic)
{
    auto s = (JSMapState*) JS_GetOpaque2(ctx, this_val, JS_CLASS_MAP + magic);
    JSMapRecord *mr;
    JSValueConst key, value;

    if (!s)
        return JS_EXCEPTION;
    key = map_normalize_key(ctx, argv[0]);
    if (s->is_weak && !JS_IsObject(key))
        return JS_ThrowTypeErrorNotAnObject(ctx);
    if (magic & MAGIC_SET)
        value = JS_UNDEFINED;
    else
        value = argv[1];
    mr = map_find_record(ctx, s, key);
    if (mr) {
        JS_FreeValue(ctx, mr->value);
    } else {
        mr = map_add_record(ctx, s, key);
        if (!mr)
            return JS_EXCEPTION;
    }
    mr->value = JS_DupValue(ctx, value);
    return JS_DupValue(ctx, this_val);
}

static JSValue js_map_get(JSContext *ctx, JSValueConst this_val,
                          int argc, JSValueConst *argv, int magic)
{
    auto s = (JSMapState*) JS_GetOpaque2(ctx, this_val, JS_CLASS_MAP + magic);
    JSMapRecord *mr;
    JSValueConst key;

    if (!s)
        return JS_EXCEPTION;
    key = map_normalize_key(ctx, argv[0]);
    mr = map_find_record(ctx, s, key);
    if (!mr)
        return JS_UNDEFINED;
    else
        return JS_DupValue(ctx, mr->value);
}

static JSValue js_map_has(JSContext *ctx, JSValueConst this_val,
                          int argc, JSValueConst *argv, int magic)
{
    auto s = (JSMapState*) JS_GetOpaque2(ctx, this_val, JS_CLASS_MAP + magic);
    JSMapRecord *mr;
    JSValueConst key;

    if (!s)
        return JS_EXCEPTION;
    key = map_normalize_key(ctx, argv[0]);
    mr = map_find_record(ctx, s, key);
    return JS_NewBool(ctx, (mr != NULL));
}

static JSValue js_map_delete(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv, int magic)
{
    auto s = (JSMapState*) JS_GetOpaque2(ctx, this_val, JS_CLASS_MAP + magic);
    JSMapRecord *mr;
    JSValueConst key;

    if (!s)
        return JS_EXCEPTION;
    key = map_normalize_key(ctx, argv[0]);
    mr = map_find_record(ctx, s, key);
    if (!mr)
        return JS_FALSE;
    map_delete_record(ctx->rt, s, mr);
    return JS_TRUE;
}

static JSValue js_map_clear(JSContext *ctx, JSValueConst this_val,
                            int argc, JSValueConst *argv, int magic)
{
    auto s = (JSMapState*) JS_GetOpaque2(ctx, this_val, JS_CLASS_MAP + magic);
    struct list_head *el, *el1;
    JSMapRecord *mr;

    if (!s)
        return JS_EXCEPTION;
    list_for_each_safe(el, el1, &s->records) {
        mr = list_entry(el, JSMapRecord, link);
        map_delete_record(ctx->rt, s, mr);
    }
    return JS_UNDEFINED;
}

static JSValue js_map_get_size(JSContext *ctx, JSValueConst this_val, int magic)
{
    auto s = (JSMapState*) JS_GetOpaque2(ctx, this_val, JS_CLASS_MAP + magic);
    if (!s)
        return JS_EXCEPTION;
    return JS_NewUint32(ctx, s->record_count);
}

static JSValue js_map_forEach(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv, int magic)
{
    auto s = (JSMapState*) JS_GetOpaque2(ctx, this_val, JS_CLASS_MAP + magic);
    JSValueConst func, this_arg;
    JSValue ret, args[3];
    struct list_head *el;
    JSMapRecord *mr;

    if (!s)
        return JS_EXCEPTION;
    func = argv[0];
    if (argc > 1)
        this_arg = argv[1];
    else
        this_arg = JS_UNDEFINED;
    if (check_function(ctx, func))
        return JS_EXCEPTION;
    /* Note: the list can be modified while traversing it, but the
       current element is locked */
    el = s->records.next;
    while (el != &s->records) {
        mr = list_entry(el, JSMapRecord, link);
        if (!mr->empty) {
            mr->ref_count++;
            /* must duplicate in case the record is deleted */
            args[1] = JS_DupValue(ctx, mr->key);
            if (magic)
                args[0] = args[1];
            else
                args[0] = JS_DupValue(ctx, mr->value);
            args[2] = (JSValue)this_val;
            ret = JS_Call(ctx, func, this_arg, 3, (JSValueConst *)args);
            JS_FreeValue(ctx, args[0]);
            if (!magic)
                JS_FreeValue(ctx, args[1]);
            el = el->next;
            map_decref_record(ctx->rt, mr);
            if (JS_IsException(ret))
                return ret;
            JS_FreeValue(ctx, ret);
        } else {
            el = el->next;
        }
    }
    return JS_UNDEFINED;
}

static void js_map_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p;
    JSMapState *s;
    struct list_head *el, *el1;
    JSMapRecord *mr;

    p = JS_VALUE_GET_OBJ(val);
    s = p->u.map_state;
    if (s) {
        /* if the object is deleted we are sure that no iterator is
           using it */
        list_for_each_safe(el, el1, &s->records) {
            mr = list_entry(el, JSMapRecord, link);
            if (!mr->empty) {
                if (s->is_weak)
                    delete_weak_ref(rt, mr);
                else
                    JS_FreeValueRT(rt, mr->key);
                JS_FreeValueRT(rt, mr->value);
            }
            js_free_rt(rt, mr);
        }
        js_free_rt(rt, s->hash_table);
        js_free_rt(rt, s);
    }
}

static void js_map_mark(JSRuntime *rt, JSValueConst val, JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSMapState *s;
    struct list_head *el;
    JSMapRecord *mr;

    s = p->u.map_state;
    if (s) {
        list_for_each(el, &s->records) {
            mr = list_entry(el, JSMapRecord, link);
            if (!s->is_weak)
                JS_MarkValue(rt, mr->key, mark_func);
            JS_MarkValue(rt, mr->value, mark_func);
        }
    }
}

/* Map Iterator */

typedef struct JSMapIteratorData {
    JSValue obj;
    JSIteratorKindEnum kind;
    JSMapRecord *cur_record;
} JSMapIteratorData;

static void js_map_iterator_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p;
    JSMapIteratorData *it;

    p = JS_VALUE_GET_OBJ(val);
    it = p->u.map_iterator_data;
    if (it) {
        /* During the GC sweep phase the Map finalizer may be
           called before the Map iterator finalizer */
        if (JS_IsLiveObject(rt, it->obj) && it->cur_record) {
            map_decref_record(rt, it->cur_record);
        }
        JS_FreeValueRT(rt, it->obj);
        js_free_rt(rt, it);
    }
}

static void js_map_iterator_mark(JSRuntime *rt, JSValueConst val,
                                 JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSMapIteratorData *it;
    it = p->u.map_iterator_data;
    if (it) {
        /* the record is already marked by the object */
        JS_MarkValue(rt, it->obj, mark_func);
    }
}

static JSValue js_create_map_iterator(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv, int magic)
{
    JSIteratorKindEnum kind;
    JSMapState *s;
    JSMapIteratorData *it;
    JSValue enum_obj;

    kind = (JSIteratorKindEnum) (magic >> 2);
    magic &= 3;
    s = (JSMapState*) JS_GetOpaque2(ctx, this_val, JS_CLASS_MAP + magic);
    if (!s)
        return JS_EXCEPTION;
    enum_obj = JS_NewObjectClass(ctx, JS_CLASS_MAP_ITERATOR + magic);
    if (JS_IsException(enum_obj))
        goto fail;
    it = (JSMapIteratorData*) js_malloc(ctx, sizeof(*it));
    if (!it) {
        JS_FreeValue(ctx, enum_obj);
        goto fail;
    }
    it->obj = JS_DupValue(ctx, this_val);
    it->kind = kind;
    it->cur_record = NULL;
    JS_SetOpaque(enum_obj, it);
    return enum_obj;
 fail:
    return JS_EXCEPTION;
}

static JSValue js_map_iterator_next(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv,
                                    BOOL *pdone, int magic)
{
    JSMapIteratorData *it;
    JSMapState *s;
    JSMapRecord *mr;
    struct list_head *el;

    it = (JSMapIteratorData*) JS_GetOpaque2(ctx, this_val, JS_CLASS_MAP_ITERATOR + magic);
    if (!it) {
        *pdone = FALSE;
        return JS_EXCEPTION;
    }
    if (JS_IsUndefined(it->obj))
        goto done;
    s = (JSMapState*) JS_GetOpaque(it->obj, JS_CLASS_MAP + magic);
    assert(s != NULL);
    if (!it->cur_record) {
        el = s->records.next;
    } else {
        mr = it->cur_record;
        el = mr->link.next;
        map_decref_record(ctx->rt, mr); /* the record can be freed here */
    }
    for(;;) {
        if (el == &s->records) {
            /* no more record  */
            it->cur_record = NULL;
            JS_FreeValue(ctx, it->obj);
            it->obj = JS_UNDEFINED;
        done:
            /* end of enumeration */
            *pdone = TRUE;
            return JS_UNDEFINED;
        }
        mr = list_entry(el, JSMapRecord, link);
        if (!mr->empty)
            break;
        /* get the next record */
        el = mr->link.next;
    }

    /* lock the record so that it won't be freed */
    mr->ref_count++;
    it->cur_record = mr;
    *pdone = FALSE;

    if (it->kind == JS_ITERATOR_KIND_KEY) {
        return JS_DupValue(ctx, mr->key);
    } else {
        JSValueConst args[2];
        args[0] = mr->key;
        if (magic)
            args[1] = mr->key;
        else
            args[1] = mr->value;
        if (it->kind == JS_ITERATOR_KIND_VALUE) {
            return JS_DupValue(ctx, args[1]);
        } else {
            return js_create_array(ctx, 2, args);
        }
    }
}

static const JSCFunctionListEntry js_map_funcs[] = {
    JS_CGETSET_DEF("[Symbol.species]", js_get_this, NULL ),
};

static const JSCFunctionListEntry js_map_proto_funcs[] = {
    JS_CFUNC_MAGIC_DEF("set", 2, js_map_set, 0 ),
    JS_CFUNC_MAGIC_DEF("get", 1, js_map_get, 0 ),
    JS_CFUNC_MAGIC_DEF("has", 1, js_map_has, 0 ),
    JS_CFUNC_MAGIC_DEF("delete", 1, js_map_delete, 0 ),
    JS_CFUNC_MAGIC_DEF("clear", 0, js_map_clear, 0 ),
    JS_CGETSET_MAGIC_DEF("size", js_map_get_size, NULL, 0),
    JS_CFUNC_MAGIC_DEF("forEach", 1, js_map_forEach, 0 ),
    JS_CFUNC_MAGIC_DEF("values", 0, js_create_map_iterator, (JS_ITERATOR_KIND_VALUE << 2) | 0 ),
    JS_CFUNC_MAGIC_DEF("keys", 0, js_create_map_iterator, (JS_ITERATOR_KIND_KEY << 2) | 0 ),
    JS_CFUNC_MAGIC_DEF("entries", 0, js_create_map_iterator, (JS_ITERATOR_KIND_KEY_AND_VALUE << 2) | 0 ),
    JS_ALIAS_DEF("[Symbol.iterator]", "entries" ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "Map", JS_PROP_CONFIGURABLE ),
};

static const JSCFunctionListEntry js_map_iterator_proto_funcs[] = {
    JS_ITERATOR_NEXT_DEF("next", 0, js_map_iterator_next, 0 ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "Map Iterator", JS_PROP_CONFIGURABLE ),
};

static const JSCFunctionListEntry js_set_proto_funcs[] = {
    JS_CFUNC_MAGIC_DEF("add", 1, js_map_set, MAGIC_SET ),
    JS_CFUNC_MAGIC_DEF("has", 1, js_map_has, MAGIC_SET ),
    JS_CFUNC_MAGIC_DEF("delete", 1, js_map_delete, MAGIC_SET ),
    JS_CFUNC_MAGIC_DEF("clear", 0, js_map_clear, MAGIC_SET ),
    JS_CGETSET_MAGIC_DEF("size", js_map_get_size, NULL, MAGIC_SET ),
    JS_CFUNC_MAGIC_DEF("forEach", 1, js_map_forEach, MAGIC_SET ),
    JS_CFUNC_MAGIC_DEF("values", 0, js_create_map_iterator, (JS_ITERATOR_KIND_KEY << 2) | MAGIC_SET ),
    JS_ALIAS_DEF("keys", "values" ),
    JS_ALIAS_DEF("[Symbol.iterator]", "values" ),
    JS_CFUNC_MAGIC_DEF("entries", 0, js_create_map_iterator, (JS_ITERATOR_KIND_KEY_AND_VALUE << 2) | MAGIC_SET ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "Set", JS_PROP_CONFIGURABLE ),
};

static const JSCFunctionListEntry js_set_iterator_proto_funcs[] = {
    JS_ITERATOR_NEXT_DEF("next", 0, js_map_iterator_next, MAGIC_SET ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "Set Iterator", JS_PROP_CONFIGURABLE ),
};

static const JSCFunctionListEntry js_weak_map_proto_funcs[] = {
    JS_CFUNC_MAGIC_DEF("set", 2, js_map_set, MAGIC_WEAK ),
    JS_CFUNC_MAGIC_DEF("get", 1, js_map_get, MAGIC_WEAK ),
    JS_CFUNC_MAGIC_DEF("has", 1, js_map_has, MAGIC_WEAK ),
    JS_CFUNC_MAGIC_DEF("delete", 1, js_map_delete, MAGIC_WEAK ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "WeakMap", JS_PROP_CONFIGURABLE ),
};

static const JSCFunctionListEntry js_weak_set_proto_funcs[] = {
    JS_CFUNC_MAGIC_DEF("add", 1, js_map_set, MAGIC_SET | MAGIC_WEAK ),
    JS_CFUNC_MAGIC_DEF("has", 1, js_map_has, MAGIC_SET | MAGIC_WEAK ),
    JS_CFUNC_MAGIC_DEF("delete", 1, js_map_delete, MAGIC_SET | MAGIC_WEAK ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "WeakSet", JS_PROP_CONFIGURABLE ),
};

static const JSCFunctionListEntry * const js_map_proto_funcs_ptr[6] = {
    js_map_proto_funcs,
    js_set_proto_funcs,
    js_weak_map_proto_funcs,
    js_weak_set_proto_funcs,
    js_map_iterator_proto_funcs,
    js_set_iterator_proto_funcs,
};

static const uint8_t js_map_proto_funcs_count[6] = {
    countof(js_map_proto_funcs),
    countof(js_set_proto_funcs),
    countof(js_weak_map_proto_funcs),
    countof(js_weak_set_proto_funcs),
    countof(js_map_iterator_proto_funcs),
    countof(js_set_iterator_proto_funcs),
};

inline void JS_AddIntrinsicMapSet(JSContext *ctx)
{
    int i;
    JSValue obj1;
    char buf[ATOM_GET_STR_BUF_SIZE];

    for(i = 0; i < 4; i++) {
        const char *name = JS_AtomGetStr(ctx, buf, sizeof(buf),
                                         JS_ATOM_Map + i);
        ctx->class_proto[JS_CLASS_MAP + i] = JS_NewObject(ctx);
        JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_MAP + i],
                                   js_map_proto_funcs_ptr[i],
                                   js_map_proto_funcs_count[i]);
        obj1 = JS_NewCFunctionMagic(ctx, js_map_constructor, name, 0,
                                    JS_CFUNC_constructor_magic, i);
        if (i < 2) {
            JS_SetPropertyFunctionList(ctx, obj1, js_map_funcs,
                                       countof(js_map_funcs));
        }
        JS_NewGlobalCConstructor2(ctx, obj1, name, ctx->class_proto[JS_CLASS_MAP + i]);
    }

    for(i = 0; i < 2; i++) {
        ctx->class_proto[JS_CLASS_MAP_ITERATOR + i] =
            JS_NewObjectProto(ctx, ctx->iterator_proto);
        JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_MAP_ITERATOR + i],
                                   js_map_proto_funcs_ptr[i + 4],
                                   js_map_proto_funcs_count[i + 4]);
    }
}

/* Generator */
static const JSCFunctionListEntry js_generator_function_proto_funcs[] = {
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "GeneratorFunction", JS_PROP_CONFIGURABLE),
};

static const JSCFunctionListEntry js_generator_proto_funcs[] = {
    JS_ITERATOR_NEXT_DEF("next", 1, js_generator_next, GEN_MAGIC_NEXT ),
    JS_ITERATOR_NEXT_DEF("return", 1, js_generator_next, GEN_MAGIC_RETURN ),
    JS_ITERATOR_NEXT_DEF("throw", 1, js_generator_next, GEN_MAGIC_THROW ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "Generator", JS_PROP_CONFIGURABLE),
};

/* Promise */

typedef enum JSPromiseStateEnum {
    JS_PROMISE_PENDING,
    JS_PROMISE_FULFILLED,
    JS_PROMISE_REJECTED,
} JSPromiseStateEnum;

typedef struct JSPromiseData {
    JSPromiseStateEnum promise_state;
    /* 0=fulfill, 1=reject, list of JSPromiseReactionData.link */
    struct list_head promise_reactions[2];
    BOOL is_handled; /* Note: only useful to debug */
    JSValue promise_result;
} JSPromiseData;

typedef struct JSPromiseFunctionDataResolved {
    int ref_count;
    BOOL already_resolved;
} JSPromiseFunctionDataResolved;

typedef struct JSPromiseFunctionData {
    JSValue promise;
    JSPromiseFunctionDataResolved *presolved;
} JSPromiseFunctionData;

typedef struct JSPromiseReactionData {
    struct list_head link; /* not used in promise_reaction_job */
    JSValue resolving_funcs[2];
    JSValue handler;
} JSPromiseReactionData;

static int js_create_resolving_functions(JSContext *ctx, JSValue *args,
                                         JSValueConst promise);

static void promise_reaction_data_free(JSRuntime *rt,
                                       JSPromiseReactionData *rd)
{
    JS_FreeValueRT(rt, rd->resolving_funcs[0]);
    JS_FreeValueRT(rt, rd->resolving_funcs[1]);
    JS_FreeValueRT(rt, rd->handler);
    js_free_rt(rt, rd);
}

static JSValue promise_reaction_job(JSContext *ctx, int argc,
                                    JSValueConst *argv)
{
    JSValueConst handler, arg, func;
    JSValue res, res2;
    BOOL is_reject;

    assert(argc == 5);
    handler = argv[2];
    is_reject = JS_ToBool(ctx, argv[3]);
    arg = argv[4];
#ifdef DUMP_PROMISE
    printf("promise_reaction_job: is_reject=%d\n", is_reject);
#endif

    if (JS_IsUndefined(handler)) {
        if (is_reject) {
            res = JS_Throw(ctx, JS_DupValue(ctx, arg));
        } else {
            res = JS_DupValue(ctx, arg);
        }
    } else {
        res = JS_Call(ctx, handler, JS_UNDEFINED, 1, &arg);
    }
    is_reject = JS_IsException(res);
    if (is_reject)
        res = JS_GetException(ctx);
    func = argv[is_reject];
    /* as an extension, we support undefined as value to avoid
       creating a dummy promise in the 'await' implementation of async
       functions */
    if (!JS_IsUndefined(func)) {
        res2 = JS_Call(ctx, func, JS_UNDEFINED,
                       1, (JSValueConst *)&res);
    } else {
        res2 = JS_UNDEFINED;
    }
    JS_FreeValue(ctx, res);

    return res2;
}

inline void JS_SetHostPromiseRejectionTracker(JSRuntime *rt,
                                       JSHostPromiseRejectionTracker *cb,
                                       void *opaque)
{
    rt->host_promise_rejection_tracker = cb;
    rt->host_promise_rejection_tracker_opaque = opaque;
}

static void fulfill_or_reject_promise(JSContext *ctx, JSValueConst promise,
                                      JSValueConst value, BOOL is_reject)
{
    auto s = (JSPromiseData*) JS_GetOpaque(promise, JS_CLASS_PROMISE);
    struct list_head *el, *el1;
    JSPromiseReactionData *rd;
    JSValueConst args[5];

    if (!s || s->promise_state != JS_PROMISE_PENDING)
        return; /* should never happen */
    set_value(ctx, &s->promise_result, JS_DupValue(ctx, value));
    s->promise_state = (JSPromiseStateEnum) (JS_PROMISE_FULFILLED + is_reject);
#ifdef DUMP_PROMISE
    printf("fulfill_or_reject_promise: is_reject=%d\n", is_reject);
#endif
    if (s->promise_state == JS_PROMISE_REJECTED && !s->is_handled) {
        JSRuntime *rt = ctx->rt;
        if (rt->host_promise_rejection_tracker) {
            rt->host_promise_rejection_tracker(ctx, promise, value, FALSE,
                                               rt->host_promise_rejection_tracker_opaque);
        }
    }

    list_for_each_safe(el, el1, &s->promise_reactions[is_reject]) {
        rd = list_entry(el, JSPromiseReactionData, link);
        args[0] = rd->resolving_funcs[0];
        args[1] = rd->resolving_funcs[1];
        args[2] = rd->handler;
        args[3] = JS_NewBool(ctx, is_reject);
        args[4] = value;
        JS_EnqueueJob(ctx, promise_reaction_job, 5, args);
        list_del(&rd->link);
        promise_reaction_data_free(ctx->rt, rd);
    }

    list_for_each_safe(el, el1, &s->promise_reactions[1 - is_reject]) {
        rd = list_entry(el, JSPromiseReactionData, link);
        list_del(&rd->link);
        promise_reaction_data_free(ctx->rt, rd);
    }
}

static void reject_promise(JSContext *ctx, JSValueConst promise,
                           JSValueConst value)
{
    fulfill_or_reject_promise(ctx, promise, value, TRUE);
}

static JSValue js_promise_resolve_thenable_job(JSContext *ctx,
                                               int argc, JSValueConst *argv)
{
    JSValueConst promise, thenable, then;
    JSValue args[2], res;

#ifdef DUMP_PROMISE
    printf("js_promise_resolve_thenable_job\n");
#endif
    assert(argc == 3);
    promise = argv[0];
    thenable = argv[1];
    then = argv[2];
    if (js_create_resolving_functions(ctx, args, promise) < 0)
        return JS_EXCEPTION;
    res = JS_Call(ctx, then, thenable, 2, (JSValueConst *)args);
    if (JS_IsException(res)) {
        JSValue error = JS_GetException(ctx);
        res = JS_Call(ctx, args[1], JS_UNDEFINED, 1, (JSValueConst *)&error);
        JS_FreeValue(ctx, error);
    }
    JS_FreeValue(ctx, args[0]);
    JS_FreeValue(ctx, args[1]);
    return res;
}

static void js_promise_resolve_function_free_resolved(JSRuntime *rt,
                                                      JSPromiseFunctionDataResolved *sr)
{
    if (--sr->ref_count == 0) {
        js_free_rt(rt, sr);
    }
}

static int js_create_resolving_functions(JSContext *ctx,
                                         JSValue *resolving_funcs,
                                         JSValueConst promise)

{
    JSValue obj;
    JSPromiseFunctionData *s;
    JSPromiseFunctionDataResolved *sr;
    int i, ret;

    sr = (JSPromiseFunctionDataResolved*) js_malloc(ctx, sizeof(*sr));
    if (!sr)
        return -1;
    sr->ref_count = 1;
    sr->already_resolved = FALSE; /* must be shared between the two functions */
    ret = 0;
    for(i = 0; i < 2; i++) {
        obj = JS_NewObjectProtoClass(ctx, ctx->function_proto,
                                     JS_CLASS_PROMISE_RESOLVE_FUNCTION + i);
        if (JS_IsException(obj))
            goto fail;
        s = (JSPromiseFunctionData*) js_malloc(ctx, sizeof(*s));
        if (!s) {
            JS_FreeValue(ctx, obj);
        fail:

            if (i != 0)
                JS_FreeValue(ctx, resolving_funcs[0]);
            ret = -1;
            break;
        }
        sr->ref_count++;
        s->presolved = sr;
        s->promise = JS_DupValue(ctx, promise);
        JS_SetOpaque(obj, s);
        js_function_set_properties(ctx, obj, JS_ATOM_empty_string, 1);
        resolving_funcs[i] = obj;
    }
    js_promise_resolve_function_free_resolved(ctx->rt, sr);
    return ret;
}

static void js_promise_resolve_function_finalizer(JSRuntime *rt, JSValue val)
{
    JSPromiseFunctionData *s = JS_VALUE_GET_OBJ(val)->u.promise_function_data;
    if (s) {
        js_promise_resolve_function_free_resolved(rt, s->presolved);
        JS_FreeValueRT(rt, s->promise);
        js_free_rt(rt, s);
    }
}

static void js_promise_resolve_function_mark(JSRuntime *rt, JSValueConst val,
                                             JS_MarkFunc *mark_func)
{
    JSPromiseFunctionData *s = JS_VALUE_GET_OBJ(val)->u.promise_function_data;
    if (s) {
        JS_MarkValue(rt, s->promise, mark_func);
    }
}

static JSValue js_promise_resolve_function_call(JSContext *ctx,
                                                JSValueConst func_obj,
                                                JSValueConst this_val,
                                                int argc, JSValueConst *argv,
                                                int flags)
{
    JSObject *p = JS_VALUE_GET_OBJ(func_obj);
    JSPromiseFunctionData *s;
    JSValueConst resolution, args[3];
    JSValue then;
    BOOL is_reject;

    s = p->u.promise_function_data;
    if (!s || s->presolved->already_resolved)
        return JS_UNDEFINED;
    s->presolved->already_resolved = TRUE;
    is_reject = p->class_id - JS_CLASS_PROMISE_RESOLVE_FUNCTION;
    if (argc > 0)
        resolution = argv[0];
    else
        resolution = JS_UNDEFINED;
#ifdef DUMP_PROMISE
    printf("js_promise_resolving_function_call: is_reject=%d resolution=", is_reject);
    JS_DumpValue(ctx, resolution);
    printf("\n");
#endif
    if (is_reject || !JS_IsObject(resolution)) {
        goto done;
    } else if (js_same_value(ctx, resolution, s->promise)) {
        JS_ThrowTypeError(ctx, "promise self resolution");
        goto fail_reject;
    }
    then = JS_GetProperty(ctx, resolution, JS_ATOM_then);
    if (JS_IsException(then)) {
        JSValue error;
    fail_reject:
        error = JS_GetException(ctx);
        reject_promise(ctx, s->promise, error);
        JS_FreeValue(ctx, error);
    } else if (!JS_IsFunction(ctx, then)) {
        JS_FreeValue(ctx, then);
    done:
        fulfill_or_reject_promise(ctx, s->promise, resolution, is_reject);
    } else {
        args[0] = s->promise;
        args[1] = resolution;
        args[2] = then;
        JS_EnqueueJob(ctx, js_promise_resolve_thenable_job, 3, args);
        JS_FreeValue(ctx, then);
    }
    return JS_UNDEFINED;
}

static void js_promise_finalizer(JSRuntime *rt, JSValue val)
{
    auto s = (JSPromiseData*) JS_GetOpaque(val, JS_CLASS_PROMISE);
    struct list_head *el, *el1;
    int i;

    if (!s)
        return;
    for(i = 0; i < 2; i++) {
        list_for_each_safe(el, el1, &s->promise_reactions[i]) {
            JSPromiseReactionData *rd =
                list_entry(el, JSPromiseReactionData, link);
            promise_reaction_data_free(rt, rd);
        }
    }
    JS_FreeValueRT(rt, s->promise_result);
    js_free_rt(rt, s);
}

static void js_promise_mark(JSRuntime *rt, JSValueConst val,
                            JS_MarkFunc *mark_func)
{
    auto s = (JSPromiseData*) JS_GetOpaque(val, JS_CLASS_PROMISE);
    struct list_head *el;
    int i;

    if (!s)
        return;
    for(i = 0; i < 2; i++) {
        list_for_each(el, &s->promise_reactions[i]) {
            JSPromiseReactionData *rd =
                list_entry(el, JSPromiseReactionData, link);
            JS_MarkValue(rt, rd->resolving_funcs[0], mark_func);
            JS_MarkValue(rt, rd->resolving_funcs[1], mark_func);
            JS_MarkValue(rt, rd->handler, mark_func);
        }
    }
    JS_MarkValue(rt, s->promise_result, mark_func);
}

static JSValue js_promise_constructor(JSContext *ctx, JSValueConst new_target,
                                      int argc, JSValueConst *argv)
{
    JSValueConst executor;
    JSValue obj;
    JSPromiseData *s;
    JSValue args[2], ret;
    int i;

    executor = argv[0];
    if (check_function(ctx, executor))
        return JS_EXCEPTION;
    obj = js_create_from_ctor(ctx, new_target, JS_CLASS_PROMISE);
    if (JS_IsException(obj))
        return JS_EXCEPTION;
    s = (JSPromiseData*) js_mallocz(ctx, sizeof(*s));
    if (!s)
        goto fail;
    s->promise_state = JS_PROMISE_PENDING;
    s->is_handled = FALSE;
    for(i = 0; i < 2; i++)
        init_list_head(&s->promise_reactions[i]);
    s->promise_result = JS_UNDEFINED;
    JS_SetOpaque(obj, s);
    if (js_create_resolving_functions(ctx, args, obj))
        goto fail;
    ret = JS_Call(ctx, executor, JS_UNDEFINED, 2, (JSValueConst *)args);
    if (JS_IsException(ret)) {
        JSValue ret2, error;
        error = JS_GetException(ctx);
        ret2 = JS_Call(ctx, args[1], JS_UNDEFINED, 1, (JSValueConst *)&error);
        JS_FreeValue(ctx, error);
        if (JS_IsException(ret2))
            goto fail1;
        JS_FreeValue(ctx, ret2);
    }
    JS_FreeValue(ctx, ret);
    JS_FreeValue(ctx, args[0]);
    JS_FreeValue(ctx, args[1]);
    return obj;
 fail1:
    JS_FreeValue(ctx, args[0]);
    JS_FreeValue(ctx, args[1]);
 fail:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_promise_executor(JSContext *ctx,
                                   JSValueConst this_val,
                                   int argc, JSValueConst *argv,
                                   int magic, JSValue *func_data)
{
    int i;

    for(i = 0; i < 2; i++) {
        if (!JS_IsUndefined(func_data[i]))
            return JS_ThrowTypeError(ctx, "resolving function already set");
        func_data[i] = JS_DupValue(ctx, argv[i]);
    }
    return JS_UNDEFINED;
}

static JSValue js_promise_executor_new(JSContext *ctx)
{
    JSValueConst func_data[2];

    func_data[0] = JS_UNDEFINED;
    func_data[1] = JS_UNDEFINED;
    return JS_NewCFunctionData(ctx, js_promise_executor, 2,
                               0, 2, func_data);
}

static JSValue js_new_promise_capability(JSContext *ctx,
                                         JSValue *resolving_funcs,
                                         JSValueConst ctor)
{
    JSValue executor, result_promise;
    JSCFunctionDataRecord *s;
    int i;

    executor = js_promise_executor_new(ctx);
    if (JS_IsException(executor))
        return executor;

    if (JS_IsUndefined(ctor)) {
        result_promise = js_promise_constructor(ctx, ctor, 1,
                                                (JSValueConst *)&executor);
    } else {
        result_promise = JS_CallConstructor(ctx, ctor, 1,
                                            (JSValueConst *)&executor);
    }
    if (JS_IsException(result_promise))
        goto fail;
    s = (JSCFunctionDataRecord*) JS_GetOpaque(executor, JS_CLASS_C_FUNCTION_DATA);
    for(i = 0; i < 2; i++) {
        if (check_function(ctx, s->data[i]))
            goto fail;
    }
    for(i = 0; i < 2; i++)
        resolving_funcs[i] = JS_DupValue(ctx, s->data[i]);
    JS_FreeValue(ctx, executor);
    return result_promise;
 fail:
    JS_FreeValue(ctx, executor);
    JS_FreeValue(ctx, result_promise);
    return JS_EXCEPTION;
}

inline JSValue JS_NewPromiseCapability(JSContext *ctx, JSValue *resolving_funcs)
{
    return js_new_promise_capability(ctx, resolving_funcs, JS_UNDEFINED);
}

static JSValue js_promise_resolve(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv, int magic)
{
    JSValue result_promise, resolving_funcs[2], ret;
    BOOL is_reject = magic;

    if (!JS_IsObject(this_val))
        return JS_ThrowTypeErrorNotAnObject(ctx);
    if (!is_reject && JS_GetOpaque(argv[0], JS_CLASS_PROMISE)) {
        JSValue ctor;
        BOOL is_same;
        ctor = JS_GetProperty(ctx, argv[0], JS_ATOM_constructor);
        if (JS_IsException(ctor))
            return ctor;
        is_same = js_same_value(ctx, ctor, this_val);
        JS_FreeValue(ctx, ctor);
        if (is_same)
            return JS_DupValue(ctx, argv[0]);
    }
    result_promise = js_new_promise_capability(ctx, resolving_funcs, this_val);
    if (JS_IsException(result_promise))
        return result_promise;
    ret = JS_Call(ctx, resolving_funcs[is_reject], JS_UNDEFINED, 1, argv);
    JS_FreeValue(ctx, resolving_funcs[0]);
    JS_FreeValue(ctx, resolving_funcs[1]);
    if (JS_IsException(ret)) {
        JS_FreeValue(ctx, result_promise);
        return ret;
    }
    JS_FreeValue(ctx, ret);
    return result_promise;
}

#if 0
static JSValue js_promise___newPromiseCapability(JSContext *ctx,
                                                 JSValueConst this_val,
                                                 int argc, JSValueConst *argv)
{
    JSValue result_promise, resolving_funcs[2], obj;
    JSValueConst ctor;
    ctor = argv[0];
    if (!JS_IsObject(ctor))
        return JS_ThrowTypeErrorNotAnObject(ctx);
    result_promise = js_new_promise_capability(ctx, resolving_funcs, ctor);
    if (JS_IsException(result_promise))
        return result_promise;
    obj = JS_NewObject(ctx);
    if (JS_IsException(obj)) {
        JS_FreeValue(ctx, resolving_funcs[0]);
        JS_FreeValue(ctx, resolving_funcs[1]);
        JS_FreeValue(ctx, result_promise);
        return JS_EXCEPTION;
    }
    JS_DefinePropertyValue(ctx, obj, JS_ATOM_promise, result_promise, JS_PROP_C_W_E);
    JS_DefinePropertyValue(ctx, obj, JS_ATOM_resolve, resolving_funcs[0], JS_PROP_C_W_E);
    JS_DefinePropertyValue(ctx, obj, JS_ATOM_reject, resolving_funcs[1], JS_PROP_C_W_E);
    return obj;
}
#endif

[[nodiscard]] static int remainingElementsCount_add(JSContext *ctx,
                                                  JSValueConst resolve_element_env,
                                                  int addend)
{
    JSValue val;
    int remainingElementsCount;

    val = JS_GetPropertyUint32(ctx, resolve_element_env, 0);
    if (JS_IsException(val))
        return -1;
    if (JS_ToInt32Free(ctx, &remainingElementsCount, val))
        return -1;
    remainingElementsCount += addend;
    if (JS_SetPropertyUint32(ctx, resolve_element_env, 0,
                             JS_NewInt32(ctx, remainingElementsCount)) < 0)
        return -1;
    return (remainingElementsCount == 0);
}

#define PROMISE_MAGIC_all        0
#define PROMISE_MAGIC_allSettled 1
#define PROMISE_MAGIC_any        2

static JSValue js_promise_all_resolve_element(JSContext *ctx,
                                              JSValueConst this_val,
                                              int argc, JSValueConst *argv,
                                              int magic,
                                              JSValue *func_data)
{
    int resolve_type = magic & 3;
    int is_reject = magic & 4;
    BOOL alreadyCalled = JS_ToBool(ctx, func_data[0]);
    JSValueConst values = func_data[2];
    JSValueConst resolve = func_data[3];
    JSValueConst resolve_element_env = func_data[4];
    JSValue ret, obj;
    int is_zero, index;

    if (JS_ToInt32(ctx, &index, func_data[1]))
        return JS_EXCEPTION;
    if (alreadyCalled)
        return JS_UNDEFINED;
    func_data[0] = JS_NewBool(ctx, TRUE);

    if (resolve_type == PROMISE_MAGIC_allSettled) {
        JSValue str;

        obj = JS_NewObject(ctx);
        if (JS_IsException(obj))
            return JS_EXCEPTION;
        str = JS_NewString(ctx, is_reject ? "rejected" : "fulfilled");
        if (JS_IsException(str))
            goto fail1;
        if (JS_DefinePropertyValue(ctx, obj, JS_ATOM_status,
                                   str,
                                   JS_PROP_C_W_E) < 0)
            goto fail1;
        if (JS_DefinePropertyValue(ctx, obj,
                                   is_reject ? JS_ATOM_reason : JS_ATOM_value,
                                   JS_DupValue(ctx, argv[0]),
                                   JS_PROP_C_W_E) < 0) {
        fail1:
            JS_FreeValue(ctx, obj);
            return JS_EXCEPTION;
        }
    } else {
        obj = JS_DupValue(ctx, argv[0]);
    }
    if (JS_DefinePropertyValueUint32(ctx, values, index,
                                     obj, JS_PROP_C_W_E) < 0)
        return JS_EXCEPTION;

    is_zero = remainingElementsCount_add(ctx, resolve_element_env, -1);
    if (is_zero < 0)
        return JS_EXCEPTION;
    if (is_zero) {
        if (resolve_type == PROMISE_MAGIC_any) {
            JSValue error;
            error = js_aggregate_error_constructor(ctx, values);
            if (JS_IsException(error))
                return JS_EXCEPTION;
            ret = JS_Call(ctx, resolve, JS_UNDEFINED, 1, (JSValueConst *)&error);
            JS_FreeValue(ctx, error);
        } else {
            ret = JS_Call(ctx, resolve, JS_UNDEFINED, 1, (JSValueConst *)&values);
        }
        if (JS_IsException(ret))
            return ret;
        JS_FreeValue(ctx, ret);
    }
    return JS_UNDEFINED;
}

/* magic = 0: Promise.all 1: Promise.allSettled */
static JSValue js_promise_all(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv, int magic)
{
    JSValue result_promise, resolving_funcs[2], item, next_promise, ret;
    JSValue next_method = JS_UNDEFINED, values = JS_UNDEFINED;
    JSValue resolve_element_env = JS_UNDEFINED, resolve_element, reject_element;
    JSValue promise_resolve = JS_UNDEFINED, iter = JS_UNDEFINED;
    JSValueConst then_args[2], resolve_element_data[5];
    BOOL done;
    int index, is_zero, is_promise_any = (magic == PROMISE_MAGIC_any);

    if (!JS_IsObject(this_val))
        return JS_ThrowTypeErrorNotAnObject(ctx);
    result_promise = js_new_promise_capability(ctx, resolving_funcs, this_val);
    if (JS_IsException(result_promise))
        return result_promise;
    promise_resolve = JS_GetProperty(ctx, this_val, JS_ATOM_resolve);
    if (JS_IsException(promise_resolve) ||
        check_function(ctx, promise_resolve))
        goto fail_reject;
    iter = JS_GetIterator(ctx, argv[0], FALSE);
    if (JS_IsException(iter)) {
        JSValue error;
    fail_reject:
        error = JS_GetException(ctx);
        ret = JS_Call(ctx, resolving_funcs[1], JS_UNDEFINED, 1,
                       (JSValueConst *)&error);
        JS_FreeValue(ctx, error);
        if (JS_IsException(ret))
            goto fail;
        JS_FreeValue(ctx, ret);
    } else {
        next_method = JS_GetProperty(ctx, iter, JS_ATOM_next);
        if (JS_IsException(next_method))
            goto fail_reject;
        values = JS_NewArray(ctx);
        if (JS_IsException(values))
            goto fail_reject;
        resolve_element_env = JS_NewArray(ctx);
        if (JS_IsException(resolve_element_env))
            goto fail_reject;
        /* remainingElementsCount field */
        if (JS_DefinePropertyValueUint32(ctx, resolve_element_env, 0,
                                         JS_NewInt32(ctx, 1),
                                         JS_PROP_CONFIGURABLE | JS_PROP_ENUMERABLE | JS_PROP_WRITABLE) < 0)
            goto fail_reject;

        index = 0;
        for(;;) {
            /* XXX: conformance: should close the iterator if error on 'done'
               access, but not on 'value' access */
            item = JS_IteratorNext(ctx, iter, next_method, 0, NULL, &done);
            if (JS_IsException(item))
                goto fail_reject;
            if (done)
                break;
            next_promise = JS_Call(ctx, promise_resolve,
                                   this_val, 1, (JSValueConst *)&item);
            JS_FreeValue(ctx, item);
            if (JS_IsException(next_promise)) {
            fail_reject1:
                JS_IteratorClose(ctx, iter, TRUE);
                goto fail_reject;
            }
            resolve_element_data[0] = JS_NewBool(ctx, FALSE);
            resolve_element_data[1] = (JSValueConst)JS_NewInt32(ctx, index);
            resolve_element_data[2] = values;
            resolve_element_data[3] = resolving_funcs[is_promise_any];
            resolve_element_data[4] = resolve_element_env;
            resolve_element =
                JS_NewCFunctionData(ctx, js_promise_all_resolve_element, 1,
                                    magic, 5, resolve_element_data);
            if (JS_IsException(resolve_element)) {
                JS_FreeValue(ctx, next_promise);
                goto fail_reject1;
            }

            if (magic == PROMISE_MAGIC_allSettled) {
                reject_element =
                    JS_NewCFunctionData(ctx, js_promise_all_resolve_element, 1,
                                        magic | 4, 5, resolve_element_data);
                if (JS_IsException(reject_element)) {
                    JS_FreeValue(ctx, next_promise);
                    goto fail_reject1;
                }
            } else if (magic == PROMISE_MAGIC_any) {
                if (JS_DefinePropertyValueUint32(ctx, values, index,
                                                 JS_UNDEFINED, JS_PROP_C_W_E) < 0)
                    goto fail_reject1;
                reject_element = resolve_element;
                resolve_element = JS_DupValue(ctx, resolving_funcs[0]);
            } else {
                reject_element = JS_DupValue(ctx, resolving_funcs[1]);
            }

            if (remainingElementsCount_add(ctx, resolve_element_env, 1) < 0) {
                JS_FreeValue(ctx, next_promise);
                JS_FreeValue(ctx, resolve_element);
                JS_FreeValue(ctx, reject_element);
                goto fail_reject1;
            }

            then_args[0] = resolve_element;
            then_args[1] = reject_element;
            ret = JS_InvokeFree(ctx, next_promise, JS_ATOM_then, 2, then_args);
            JS_FreeValue(ctx, resolve_element);
            JS_FreeValue(ctx, reject_element);
            if (check_exception_free(ctx, ret))
                goto fail_reject1;
            index++;
        }

        is_zero = remainingElementsCount_add(ctx, resolve_element_env, -1);
        if (is_zero < 0)
            goto fail_reject;
        if (is_zero) {
            if (magic == PROMISE_MAGIC_any) {
                JSValue error;
                error = js_aggregate_error_constructor(ctx, values);
                if (JS_IsException(error))
                    goto fail_reject;
                JS_FreeValue(ctx, values);
                values = error;
            }
            ret = JS_Call(ctx, resolving_funcs[is_promise_any], JS_UNDEFINED,
                          1, (JSValueConst *)&values);
            if (check_exception_free(ctx, ret))
                goto fail_reject;
        }
    }
 done:
    JS_FreeValue(ctx, promise_resolve);
    JS_FreeValue(ctx, resolve_element_env);
    JS_FreeValue(ctx, values);
    JS_FreeValue(ctx, next_method);
    JS_FreeValue(ctx, iter);
    JS_FreeValue(ctx, resolving_funcs[0]);
    JS_FreeValue(ctx, resolving_funcs[1]);
    return result_promise;
 fail:
    JS_FreeValue(ctx, result_promise);
    result_promise = JS_EXCEPTION;
    goto done;
}

static JSValue js_promise_race(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv)
{
    JSValue result_promise, resolving_funcs[2], item, next_promise, ret;
    JSValue next_method = JS_UNDEFINED, iter = JS_UNDEFINED;
    JSValue promise_resolve = JS_UNDEFINED;
    BOOL done;

    if (!JS_IsObject(this_val))
        return JS_ThrowTypeErrorNotAnObject(ctx);
    result_promise = js_new_promise_capability(ctx, resolving_funcs, this_val);
    if (JS_IsException(result_promise))
        return result_promise;
    promise_resolve = JS_GetProperty(ctx, this_val, JS_ATOM_resolve);
    if (JS_IsException(promise_resolve) ||
        check_function(ctx, promise_resolve))
        goto fail_reject;
    iter = JS_GetIterator(ctx, argv[0], FALSE);
    if (JS_IsException(iter)) {
        JSValue error;
    fail_reject:
        error = JS_GetException(ctx);
        ret = JS_Call(ctx, resolving_funcs[1], JS_UNDEFINED, 1,
                       (JSValueConst *)&error);
        JS_FreeValue(ctx, error);
        if (JS_IsException(ret))
            goto fail;
        JS_FreeValue(ctx, ret);
    } else {
        next_method = JS_GetProperty(ctx, iter, JS_ATOM_next);
        if (JS_IsException(next_method))
            goto fail_reject;

        for(;;) {
            /* XXX: conformance: should close the iterator if error on 'done'
               access, but not on 'value' access */
            item = JS_IteratorNext(ctx, iter, next_method, 0, NULL, &done);
            if (JS_IsException(item))
                goto fail_reject;
            if (done)
                break;
            next_promise = JS_Call(ctx, promise_resolve,
                                   this_val, 1, (JSValueConst *)&item);
            JS_FreeValue(ctx, item);
            if (JS_IsException(next_promise)) {
            fail_reject1:
                JS_IteratorClose(ctx, iter, TRUE);
                goto fail_reject;
            }
            ret = JS_InvokeFree(ctx, next_promise, JS_ATOM_then, 2,
                                (JSValueConst *)resolving_funcs);
            if (check_exception_free(ctx, ret))
                goto fail_reject1;
        }
    }
 done:
    JS_FreeValue(ctx, promise_resolve);
    JS_FreeValue(ctx, next_method);
    JS_FreeValue(ctx, iter);
    JS_FreeValue(ctx, resolving_funcs[0]);
    JS_FreeValue(ctx, resolving_funcs[1]);
    return result_promise;
 fail:
    //JS_FreeValue(ctx, next_method); // why not???
    JS_FreeValue(ctx, result_promise);
    result_promise = JS_EXCEPTION;
    goto done;
}

[[nodiscard]] static int perform_promise_then(JSContext *ctx,
                                            JSValueConst promise,
                                            JSValueConst *resolve_reject,
                                            JSValueConst *cap_resolving_funcs)
{
    auto s = (JSPromiseData*) JS_GetOpaque(promise, JS_CLASS_PROMISE);
    JSPromiseReactionData *rd_array[2], *rd;
    int i, j;

    rd_array[0] = NULL;
    rd_array[1] = NULL;
    for(i = 0; i < 2; i++) {
        JSValueConst handler;
        rd = (JSPromiseReactionData*) js_mallocz(ctx, sizeof(*rd));
        if (!rd) {
            if (i == 1)
                promise_reaction_data_free(ctx->rt, rd_array[0]);
            return -1;
        }
        for(j = 0; j < 2; j++)
            rd->resolving_funcs[j] = JS_DupValue(ctx, cap_resolving_funcs[j]);
        handler = resolve_reject[i];
        if (!JS_IsFunction(ctx, handler))
            handler = JS_UNDEFINED;
        rd->handler = JS_DupValue(ctx, handler);
        rd_array[i] = rd;
    }

    if (s->promise_state == JS_PROMISE_PENDING) {
        for(i = 0; i < 2; i++)
            list_add_tail(&rd_array[i]->link, &s->promise_reactions[i]);
    } else {
        JSValueConst args[5];
        if (s->promise_state == JS_PROMISE_REJECTED && !s->is_handled) {
            JSRuntime *rt = ctx->rt;
            if (rt->host_promise_rejection_tracker) {
                rt->host_promise_rejection_tracker(ctx, promise, s->promise_result,
                                                   TRUE, rt->host_promise_rejection_tracker_opaque);
            }
        }
        i = s->promise_state - JS_PROMISE_FULFILLED;
        rd = rd_array[i];
        args[0] = rd->resolving_funcs[0];
        args[1] = rd->resolving_funcs[1];
        args[2] = rd->handler;
        args[3] = JS_NewBool(ctx, i);
        args[4] = s->promise_result;
        JS_EnqueueJob(ctx, promise_reaction_job, 5, args);
        for(i = 0; i < 2; i++)
            promise_reaction_data_free(ctx->rt, rd_array[i]);
    }
    s->is_handled = TRUE;
    return 0;
}

static JSValue js_promise_then(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv)
{
    JSValue ctor, result_promise, resolving_funcs[2];
    JSPromiseData *s;
    int i, ret;

    s = (JSPromiseData*) JS_GetOpaque2(ctx, this_val, JS_CLASS_PROMISE);
    if (!s)
        return JS_EXCEPTION;

    ctor = JS_SpeciesConstructor(ctx, this_val, JS_UNDEFINED);
    if (JS_IsException(ctor))
        return ctor;
    result_promise = js_new_promise_capability(ctx, resolving_funcs, ctor);
    JS_FreeValue(ctx, ctor);
    if (JS_IsException(result_promise))
        return result_promise;
    ret = perform_promise_then(ctx, this_val, argv,
                               (JSValueConst *)resolving_funcs);
    for(i = 0; i < 2; i++)
        JS_FreeValue(ctx, resolving_funcs[i]);
    if (ret) {
        JS_FreeValue(ctx, result_promise);
        return JS_EXCEPTION;
    }
    return result_promise;
}

static JSValue js_promise_catch(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSValueConst args[2];
    args[0] = JS_UNDEFINED;
    args[1] = argv[0];
    return JS_Invoke(ctx, this_val, JS_ATOM_then, 2, args);
}

static JSValue js_promise_finally_value_thunk(JSContext *ctx, JSValueConst this_val,
                                              int argc, JSValueConst *argv,
                                              int magic, JSValue *func_data)
{
    return JS_DupValue(ctx, func_data[0]);
}

static JSValue js_promise_finally_thrower(JSContext *ctx, JSValueConst this_val,
                                          int argc, JSValueConst *argv,
                                          int magic, JSValue *func_data)
{
    return JS_Throw(ctx, JS_DupValue(ctx, func_data[0]));
}

static JSValue js_promise_then_finally_func(JSContext *ctx, JSValueConst this_val,
                                            int argc, JSValueConst *argv,
                                            int magic, JSValue *func_data)
{
    JSValueConst ctor = func_data[0];
    JSValueConst onFinally = func_data[1];
    JSValue res, promise, ret, then_func;

    res = JS_Call(ctx, onFinally, JS_UNDEFINED, 0, NULL);
    if (JS_IsException(res))
        return res;
    promise = js_promise_resolve(ctx, ctor, 1, (JSValueConst *)&res, 0);
    JS_FreeValue(ctx, res);
    if (JS_IsException(promise))
        return promise;
    if (magic == 0) {
        then_func = JS_NewCFunctionData(ctx, js_promise_finally_value_thunk, 0,
                                        0, 1, argv);
    } else {
        then_func = JS_NewCFunctionData(ctx, js_promise_finally_thrower, 0,
                                        0, 1, argv);
    }
    if (JS_IsException(then_func)) {
        JS_FreeValue(ctx, promise);
        return then_func;
    }
    ret = JS_InvokeFree(ctx, promise, JS_ATOM_then, 1, (JSValueConst *)&then_func);
    JS_FreeValue(ctx, then_func);
    return ret;
}

static JSValue js_promise_finally(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    JSValueConst onFinally = argv[0];
    JSValue ctor, ret;
    JSValue then_funcs[2];
    JSValueConst func_data[2];
    int i;

    ctor = JS_SpeciesConstructor(ctx, this_val, JS_UNDEFINED);
    if (JS_IsException(ctor))
        return ctor;
    if (!JS_IsFunction(ctx, onFinally)) {
        then_funcs[0] = JS_DupValue(ctx, onFinally);
        then_funcs[1] = JS_DupValue(ctx, onFinally);
    } else {
        func_data[0] = ctor;
        func_data[1] = onFinally;
        for(i = 0; i < 2; i++) {
            then_funcs[i] = JS_NewCFunctionData(ctx, js_promise_then_finally_func, 1, i, 2, func_data);
            if (JS_IsException(then_funcs[i])) {
                if (i == 1)
                    JS_FreeValue(ctx, then_funcs[0]);
                JS_FreeValue(ctx, ctor);
                return JS_EXCEPTION;
            }
        }
    }
    JS_FreeValue(ctx, ctor);
    ret = JS_Invoke(ctx, this_val, JS_ATOM_then, 2, (JSValueConst *)then_funcs);
    JS_FreeValue(ctx, then_funcs[0]);
    JS_FreeValue(ctx, then_funcs[1]);
    return ret;
}

static const JSCFunctionListEntry js_promise_funcs[] = {
    JS_CFUNC_MAGIC_DEF("resolve", 1, js_promise_resolve, 0 ),
    JS_CFUNC_MAGIC_DEF("reject", 1, js_promise_resolve, 1 ),
    JS_CFUNC_MAGIC_DEF("all", 1, js_promise_all, PROMISE_MAGIC_all ),
    JS_CFUNC_MAGIC_DEF("allSettled", 1, js_promise_all, PROMISE_MAGIC_allSettled ),
    JS_CFUNC_MAGIC_DEF("any", 1, js_promise_all, PROMISE_MAGIC_any ),
    JS_CFUNC_DEF("race", 1, js_promise_race ),
    //JS_CFUNC_DEF("__newPromiseCapability", 1, js_promise___newPromiseCapability ),
    JS_CGETSET_DEF("[Symbol.species]", js_get_this, NULL),
};

static const JSCFunctionListEntry js_promise_proto_funcs[] = {
    JS_CFUNC_DEF("then", 2, js_promise_then ),
    JS_CFUNC_DEF("catch", 1, js_promise_catch ),
    JS_CFUNC_DEF("finally", 1, js_promise_finally ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "Promise", JS_PROP_CONFIGURABLE ),
};

/* AsyncFunction */
static const JSCFunctionListEntry js_async_function_proto_funcs[] = {
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "AsyncFunction", JS_PROP_CONFIGURABLE ),
};

static JSValue js_async_from_sync_iterator_unwrap(JSContext *ctx,
                                                  JSValueConst this_val,
                                                  int argc, JSValueConst *argv,
                                                  int magic, JSValue *func_data)
{
    return js_create_iterator_result(ctx, JS_DupValue(ctx, argv[0]),
                                     JS_ToBool(ctx, func_data[0]));
}

static JSValue js_async_from_sync_iterator_unwrap_func_create(JSContext *ctx,
                                                              BOOL done)
{
    JSValueConst func_data[1];

    func_data[0] = (JSValueConst)JS_NewBool(ctx, done);
    return JS_NewCFunctionData(ctx, js_async_from_sync_iterator_unwrap,
                               1, 0, 1, func_data);
}

/* AsyncIteratorPrototype */

static const JSCFunctionListEntry js_async_iterator_proto_funcs[] = {
    JS_CFUNC_DEF("[Symbol.asyncIterator]", 0, js_iterator_proto_iterator ),
};

/* AsyncFromSyncIteratorPrototype */

typedef struct JSAsyncFromSyncIteratorData {
    JSValue sync_iter;
    JSValue next_method;
} JSAsyncFromSyncIteratorData;

static void js_async_from_sync_iterator_finalizer(JSRuntime *rt, JSValue val)
{
    auto s = (JSAsyncFromSyncIteratorData*)
        JS_GetOpaque(val, JS_CLASS_ASYNC_FROM_SYNC_ITERATOR);
    if (s) {
        JS_FreeValueRT(rt, s->sync_iter);
        JS_FreeValueRT(rt, s->next_method);
        js_free_rt(rt, s);
    }
}

static void js_async_from_sync_iterator_mark(JSRuntime *rt, JSValueConst val,
                                             JS_MarkFunc *mark_func)
{
    auto s = (JSAsyncFromSyncIteratorData*)
        JS_GetOpaque(val, JS_CLASS_ASYNC_FROM_SYNC_ITERATOR);
    if (s) {
        JS_MarkValue(rt, s->sync_iter, mark_func);
        JS_MarkValue(rt, s->next_method, mark_func);
    }
}

static JSValue JS_CreateAsyncFromSyncIterator(JSContext *ctx,
                                              JSValueConst sync_iter)
{
    JSValue async_iter, next_method;
    JSAsyncFromSyncIteratorData *s;

    next_method = JS_GetProperty(ctx, sync_iter, JS_ATOM_next);
    if (JS_IsException(next_method))
        return JS_EXCEPTION;
    async_iter = JS_NewObjectClass(ctx, JS_CLASS_ASYNC_FROM_SYNC_ITERATOR);
    if (JS_IsException(async_iter)) {
        JS_FreeValue(ctx, next_method);
        return async_iter;
    }
    s = (JSAsyncFromSyncIteratorData*) js_mallocz(ctx, sizeof(*s));
    if (!s) {
        JS_FreeValue(ctx, async_iter);
        JS_FreeValue(ctx, next_method);
        return JS_EXCEPTION;
    }
    s->sync_iter = JS_DupValue(ctx, sync_iter);
    s->next_method = next_method;
    JS_SetOpaque(async_iter, s);
    return async_iter;
}

static JSValue js_async_from_sync_iterator_next(JSContext *ctx, JSValueConst this_val,
                                                int argc, JSValueConst *argv,
                                                int magic)
{
    JSValue promise, resolving_funcs[2], value, err, method;
    JSAsyncFromSyncIteratorData *s;
    int done;
    int is_reject;

    promise = JS_NewPromiseCapability(ctx, resolving_funcs);
    if (JS_IsException(promise))
        return JS_EXCEPTION;
    s = (JSAsyncFromSyncIteratorData*) JS_GetOpaque(this_val, JS_CLASS_ASYNC_FROM_SYNC_ITERATOR);
    if (!s) {
        JS_ThrowTypeError(ctx, "not an Async-from-Sync Iterator");
        goto reject;
    }

    if (magic == GEN_MAGIC_NEXT) {
        method = JS_DupValue(ctx, s->next_method);
    } else {
        method = JS_GetProperty(ctx, s->sync_iter,
                                magic == GEN_MAGIC_RETURN ? JS_ATOM_return :
                                JS_ATOM_throw);
        if (JS_IsException(method))
            goto reject;
        if (JS_IsUndefined(method) || JS_IsNull(method)) {
            if (magic == GEN_MAGIC_RETURN) {
                err = js_create_iterator_result(ctx, JS_DupValue(ctx, argv[0]), TRUE);
                is_reject = 0;
            } else {
                err = JS_DupValue(ctx, argv[0]);
                is_reject = 1;
            }
            goto done_resolve;
        }
    }
    value = JS_IteratorNext2(ctx, s->sync_iter, method,
                             argc >= 1 ? 1 : 0, argv, &done);
    JS_FreeValue(ctx, method);
    if (JS_IsException(value))
        goto reject;
    if (done == 2) {
        JSValue obj = value;
        value = JS_IteratorGetCompleteValue(ctx, obj, &done);
        JS_FreeValue(ctx, obj);
        if (JS_IsException(value))
            goto reject;
    }

    if (JS_IsException(value)) {
        JSValue res2;
    reject:
        err = JS_GetException(ctx);
        is_reject = 1;
    done_resolve:
        res2 = JS_Call(ctx, resolving_funcs[is_reject], JS_UNDEFINED,
                       1, (JSValueConst *)&err);
        JS_FreeValue(ctx, err);
        JS_FreeValue(ctx, res2);
        JS_FreeValue(ctx, resolving_funcs[0]);
        JS_FreeValue(ctx, resolving_funcs[1]);
        return promise;
    }
    {
        JSValue value_wrapper_promise, resolve_reject[2];
        int res;

        value_wrapper_promise = js_promise_resolve(ctx, ctx->promise_ctor,
                                                   1, (JSValueConst *)&value, 0);
        if (JS_IsException(value_wrapper_promise)) {
            JS_FreeValue(ctx, value);
            goto reject;
        }

        resolve_reject[0] =
            js_async_from_sync_iterator_unwrap_func_create(ctx, done);
        if (JS_IsException(resolve_reject[0])) {
            JS_FreeValue(ctx, value_wrapper_promise);
            goto fail;
        }
        JS_FreeValue(ctx, value);
        resolve_reject[1] = JS_UNDEFINED;

        res = perform_promise_then(ctx, value_wrapper_promise,
                                   (JSValueConst *)resolve_reject,
                                   (JSValueConst *)resolving_funcs);
        JS_FreeValue(ctx, resolve_reject[0]);
        JS_FreeValue(ctx, value_wrapper_promise);
        JS_FreeValue(ctx, resolving_funcs[0]);
        JS_FreeValue(ctx, resolving_funcs[1]);
        if (res) {
            JS_FreeValue(ctx, promise);
            return JS_EXCEPTION;
        }
    }
    return promise;
 fail:
    JS_FreeValue(ctx, value);
    JS_FreeValue(ctx, resolving_funcs[0]);
    JS_FreeValue(ctx, resolving_funcs[1]);
    JS_FreeValue(ctx, promise);
    return JS_EXCEPTION;
}

static const JSCFunctionListEntry js_async_from_sync_iterator_proto_funcs[] = {
    JS_CFUNC_MAGIC_DEF("next", 1, js_async_from_sync_iterator_next, GEN_MAGIC_NEXT ),
    JS_CFUNC_MAGIC_DEF("return", 1, js_async_from_sync_iterator_next, GEN_MAGIC_RETURN ),
    JS_CFUNC_MAGIC_DEF("throw", 1, js_async_from_sync_iterator_next, GEN_MAGIC_THROW ),
};

/* AsyncGeneratorFunction */

static const JSCFunctionListEntry js_async_generator_function_proto_funcs[] = {
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "AsyncGeneratorFunction", JS_PROP_CONFIGURABLE ),
};

/* AsyncGenerator prototype */

static const JSCFunctionListEntry js_async_generator_proto_funcs[] = {
    JS_CFUNC_MAGIC_DEF("next", 1, js_async_generator_next, GEN_MAGIC_NEXT ),
    JS_CFUNC_MAGIC_DEF("return", 1, js_async_generator_next, GEN_MAGIC_RETURN ),
    JS_CFUNC_MAGIC_DEF("throw", 1, js_async_generator_next, GEN_MAGIC_THROW ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "AsyncGenerator", JS_PROP_CONFIGURABLE ),
};

static JSClassShortDef const js_async_class_def[] = {
    { JS_ATOM_Promise, js_promise_finalizer, js_promise_mark },                      /* JS_CLASS_PROMISE */
    { JS_ATOM_PromiseResolveFunction, js_promise_resolve_function_finalizer, js_promise_resolve_function_mark }, /* JS_CLASS_PROMISE_RESOLVE_FUNCTION */
    { JS_ATOM_PromiseRejectFunction, js_promise_resolve_function_finalizer, js_promise_resolve_function_mark }, /* JS_CLASS_PROMISE_REJECT_FUNCTION */
    { JS_ATOM_AsyncFunction, js_bytecode_function_finalizer, js_bytecode_function_mark },  /* JS_CLASS_ASYNC_FUNCTION */
    { JS_ATOM_AsyncFunctionResolve, js_async_function_resolve_finalizer, js_async_function_resolve_mark }, /* JS_CLASS_ASYNC_FUNCTION_RESOLVE */
    { JS_ATOM_AsyncFunctionReject, js_async_function_resolve_finalizer, js_async_function_resolve_mark }, /* JS_CLASS_ASYNC_FUNCTION_REJECT */
    { JS_ATOM_empty_string, js_async_from_sync_iterator_finalizer, js_async_from_sync_iterator_mark }, /* JS_CLASS_ASYNC_FROM_SYNC_ITERATOR */
    { JS_ATOM_AsyncGeneratorFunction, js_bytecode_function_finalizer, js_bytecode_function_mark },  /* JS_CLASS_ASYNC_GENERATOR_FUNCTION */
    { JS_ATOM_AsyncGenerator, js_async_generator_finalizer, js_async_generator_mark },  /* JS_CLASS_ASYNC_GENERATOR */
};

inline void JS_AddIntrinsicPromise(JSContext *ctx)
{
    JSRuntime *rt = ctx->rt;
    JSValue obj1;

    if (!JS_IsRegisteredClass(rt, JS_CLASS_PROMISE)) {
        init_class_range(rt, js_async_class_def, JS_CLASS_PROMISE,
                         countof(js_async_class_def));
        rt->class_array[JS_CLASS_PROMISE_RESOLVE_FUNCTION].call = js_promise_resolve_function_call;
        rt->class_array[JS_CLASS_PROMISE_REJECT_FUNCTION].call = js_promise_resolve_function_call;
        rt->class_array[JS_CLASS_ASYNC_FUNCTION].call = js_async_function_call;
        rt->class_array[JS_CLASS_ASYNC_FUNCTION_RESOLVE].call = js_async_function_resolve_call;
        rt->class_array[JS_CLASS_ASYNC_FUNCTION_REJECT].call = js_async_function_resolve_call;
        rt->class_array[JS_CLASS_ASYNC_GENERATOR_FUNCTION].call = js_async_generator_function_call;
    }

    /* Promise */
    ctx->class_proto[JS_CLASS_PROMISE] = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_PROMISE],
                               js_promise_proto_funcs,
                               countof(js_promise_proto_funcs));
    obj1 = JS_NewCFunction2(ctx, js_promise_constructor, "Promise", 1,
                            JS_CFUNC_constructor, 0);
    ctx->promise_ctor = JS_DupValue(ctx, obj1);
    JS_SetPropertyFunctionList(ctx, obj1,
                               js_promise_funcs,
                               countof(js_promise_funcs));
    JS_NewGlobalCConstructor2(ctx, obj1, "Promise",
                              ctx->class_proto[JS_CLASS_PROMISE]);

    /* AsyncFunction */
    ctx->class_proto[JS_CLASS_ASYNC_FUNCTION] = JS_NewObjectProto(ctx, ctx->function_proto);
    obj1 = JS_NewCFunction3(ctx, (JSCFunction *)js_function_constructor,
                            "AsyncFunction", 1,
                            JS_CFUNC_constructor_or_func_magic, JS_FUNC_ASYNC,
                            ctx->function_ctor);
    JS_SetPropertyFunctionList(ctx,
                               ctx->class_proto[JS_CLASS_ASYNC_FUNCTION],
                               js_async_function_proto_funcs,
                               countof(js_async_function_proto_funcs));
    JS_SetConstructor2(ctx, obj1, ctx->class_proto[JS_CLASS_ASYNC_FUNCTION],
                       0, JS_PROP_CONFIGURABLE);
    JS_FreeValue(ctx, obj1);

    /* AsyncIteratorPrototype */
    ctx->async_iterator_proto = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->async_iterator_proto,
                               js_async_iterator_proto_funcs,
                               countof(js_async_iterator_proto_funcs));

    /* AsyncFromSyncIteratorPrototype */
    ctx->class_proto[JS_CLASS_ASYNC_FROM_SYNC_ITERATOR] =
        JS_NewObjectProto(ctx, ctx->async_iterator_proto);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_ASYNC_FROM_SYNC_ITERATOR],
                               js_async_from_sync_iterator_proto_funcs,
                               countof(js_async_from_sync_iterator_proto_funcs));

    /* AsyncGeneratorPrototype */
    ctx->class_proto[JS_CLASS_ASYNC_GENERATOR] =
        JS_NewObjectProto(ctx, ctx->async_iterator_proto);
    JS_SetPropertyFunctionList(ctx,
                               ctx->class_proto[JS_CLASS_ASYNC_GENERATOR],
                               js_async_generator_proto_funcs,
                               countof(js_async_generator_proto_funcs));

    /* AsyncGeneratorFunction */
    ctx->class_proto[JS_CLASS_ASYNC_GENERATOR_FUNCTION] =
        JS_NewObjectProto(ctx, ctx->function_proto);
    obj1 = JS_NewCFunction3(ctx, (JSCFunction *)js_function_constructor,
                            "AsyncGeneratorFunction", 1,
                            JS_CFUNC_constructor_or_func_magic,
                            JS_FUNC_ASYNC_GENERATOR,
                            ctx->function_ctor);
    JS_SetPropertyFunctionList(ctx,
                               ctx->class_proto[JS_CLASS_ASYNC_GENERATOR_FUNCTION],
                               js_async_generator_function_proto_funcs,
                               countof(js_async_generator_function_proto_funcs));
    JS_SetConstructor2(ctx, ctx->class_proto[JS_CLASS_ASYNC_GENERATOR_FUNCTION],
                       ctx->class_proto[JS_CLASS_ASYNC_GENERATOR],
                       JS_PROP_CONFIGURABLE, JS_PROP_CONFIGURABLE);
    JS_SetConstructor2(ctx, obj1, ctx->class_proto[JS_CLASS_ASYNC_GENERATOR_FUNCTION],
                       0, JS_PROP_CONFIGURABLE);
    JS_FreeValue(ctx, obj1);
}

/* URI handling */

static int string_get_hex(JSString *p, int k, int n) {
    int c = 0, h;
    while (n-- > 0) {
        if ((h = from_hex(string_get(p, k++))) < 0)
            return -1;
        c = (c << 4) | h;
    }
    return c;
}

static int isURIReserved(int c) {
    return c < 0x100 && memchr(";/?:@&=+$,#", c, sizeof(";/?:@&=+$,#") - 1) != NULL;
}

static int js_throw_URIError(JSContext *ctx, const char *fmt, ...)
{
    va_list ap;

    va_start(ap, fmt);
    JS_ThrowError(ctx, JS_URI_ERROR, fmt, ap);
    va_end(ap);
    return -1;
}

static int hex_decode(JSContext *ctx, JSString *p, int k) {
    int c;

    if (k >= p->len || string_get(p, k) != '%')
        return js_throw_URIError(ctx, "expecting %%");
    if (k + 2 >= p->len || (c = string_get_hex(p, k + 1, 2)) < 0)
        return js_throw_URIError(ctx, "expecting hex digit");

    return c;
}

static JSValue js_global_decodeURI(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv, int isComponent)
{
    JSValue str;
    StringBuffer b_s, *b = &b_s;
    JSString *p;
    int k, c, c1, n, c_min;

    str = JS_ToString(ctx, argv[0]);
    if (JS_IsException(str))
        return str;

    string_buffer_init(ctx, b, 0);

    p = JS_VALUE_GET_STRING(str);
    for (k = 0; k < p->len;) {
        c = string_get(p, k);
        if (c == '%') {
            c = hex_decode(ctx, p, k);
            if (c < 0)
                goto fail;
            k += 3;
            if (c < 0x80) {
                if (!isComponent && isURIReserved(c)) {
                    c = '%';
                    k -= 2;
                }
            } else {
                /* Decode URI-encoded UTF-8 sequence */
                if (c >= 0xc0 && c <= 0xdf) {
                    n = 1;
                    c_min = 0x80;
                    c &= 0x1f;
                } else if (c >= 0xe0 && c <= 0xef) {
                    n = 2;
                    c_min = 0x800;
                    c &= 0xf;
                } else if (c >= 0xf0 && c <= 0xf7) {
                    n = 3;
                    c_min = 0x10000;
                    c &= 0x7;
                } else {
                    n = 0;
                    c_min = 1;
                    c = 0;
                }
                while (n-- > 0) {
                    c1 = hex_decode(ctx, p, k);
                    if (c1 < 0)
                        goto fail;
                    k += 3;
                    if ((c1 & 0xc0) != 0x80) {
                        c = 0;
                        break;
                    }
                    c = (c << 6) | (c1 & 0x3f);
                }
                if (c < c_min || c > 0x10FFFF ||
                    (c >= 0xd800 && c < 0xe000)) {
                    js_throw_URIError(ctx, "malformed UTF-8");
                    goto fail;
                }
            }
        } else {
            k++;
        }
        string_buffer_putc(b, c);
    }
    JS_FreeValue(ctx, str);
    return string_buffer_end(b);

fail:
    JS_FreeValue(ctx, str);
    string_buffer_free(b);
    return JS_EXCEPTION;
}

static int isUnescaped(int c) {
    static char const unescaped_chars[] =
        "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
        "abcdefghijklmnopqrstuvwxyz"
        "0123456789"
        "@*_+-./";
    return c < 0x100 &&
        memchr(unescaped_chars, c, sizeof(unescaped_chars) - 1);
}

static int isURIUnescaped(int c, int isComponent) {
    return c < 0x100 &&
        ((c >= 0x61 && c <= 0x7a) ||
         (c >= 0x41 && c <= 0x5a) ||
         (c >= 0x30 && c <= 0x39) ||
         memchr("-_.!~*'()", c, sizeof("-_.!~*'()") - 1) != NULL ||
         (!isComponent && isURIReserved(c)));
}

static int encodeURI_hex(StringBuffer *b, int c) {
    uint8_t buf[6];
    int n = 0;
    const char *hex = "0123456789ABCDEF";

    buf[n++] = '%';
    if (c >= 256) {
        buf[n++] = 'u';
        buf[n++] = hex[(c >> 12) & 15];
        buf[n++] = hex[(c >>  8) & 15];
    }
    buf[n++] = hex[(c >> 4) & 15];
    buf[n++] = hex[(c >> 0) & 15];
    return string_buffer_write8(b, buf, n);
}

static JSValue js_global_encodeURI(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv,
                                   int isComponent)
{
    JSValue str;
    StringBuffer b_s, *b = &b_s;
    JSString *p;
    int k, c, c1;

    str = JS_ToString(ctx, argv[0]);
    if (JS_IsException(str))
        return str;

    p = JS_VALUE_GET_STRING(str);
    string_buffer_init(ctx, b, p->len);
    for (k = 0; k < p->len;) {
        c = string_get(p, k);
        k++;
        if (isURIUnescaped(c, isComponent)) {
            string_buffer_putc16(b, c);
        } else {
            if (c >= 0xdc00 && c <= 0xdfff) {
                js_throw_URIError(ctx, "invalid character");
                goto fail;
            } else if (c >= 0xd800 && c <= 0xdbff) {
                if (k >= p->len) {
                    js_throw_URIError(ctx, "expecting surrogate pair");
                    goto fail;
                }
                c1 = string_get(p, k);
                k++;
                if (c1 < 0xdc00 || c1 > 0xdfff) {
                    js_throw_URIError(ctx, "expecting surrogate pair");
                    goto fail;
                }
                c = (((c & 0x3ff) << 10) | (c1 & 0x3ff)) + 0x10000;
            }
            if (c < 0x80) {
                encodeURI_hex(b, c);
            } else {
                /* XXX: use C UTF-8 conversion ? */
                if (c < 0x800) {
                    encodeURI_hex(b, (c >> 6) | 0xc0);
                } else {
                    if (c < 0x10000) {
                        encodeURI_hex(b, (c >> 12) | 0xe0);
                    } else {
                        encodeURI_hex(b, (c >> 18) | 0xf0);
                        encodeURI_hex(b, ((c >> 12) & 0x3f) | 0x80);
                    }
                    encodeURI_hex(b, ((c >> 6) & 0x3f) | 0x80);
                }
                encodeURI_hex(b, (c & 0x3f) | 0x80);
            }
        }
    }
    JS_FreeValue(ctx, str);
    return string_buffer_end(b);

fail:
    JS_FreeValue(ctx, str);
    string_buffer_free(b);
    return JS_EXCEPTION;
}

static JSValue js_global_escape(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    JSValue str;
    StringBuffer b_s, *b = &b_s;
    JSString *p;
    int i, len, c;

    str = JS_ToString(ctx, argv[0]);
    if (JS_IsException(str))
        return str;

    p = JS_VALUE_GET_STRING(str);
    string_buffer_init(ctx, b, p->len);
    for (i = 0, len = p->len; i < len; i++) {
        c = string_get(p, i);
        if (isUnescaped(c)) {
            string_buffer_putc16(b, c);
        } else {
            encodeURI_hex(b, c);
        }
    }
    JS_FreeValue(ctx, str);
    return string_buffer_end(b);
}

static JSValue js_global_unescape(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    JSValue str;
    StringBuffer b_s, *b = &b_s;
    JSString *p;
    int i, len, c, n;

    str = JS_ToString(ctx, argv[0]);
    if (JS_IsException(str))
        return str;

    string_buffer_init(ctx, b, 0);
    p = JS_VALUE_GET_STRING(str);
    for (i = 0, len = p->len; i < len; i++) {
        c = string_get(p, i);
        if (c == '%') {
            if (i + 6 <= len
            &&  string_get(p, i + 1) == 'u'
            &&  (n = string_get_hex(p, i + 2, 4)) >= 0) {
                c = n;
                i += 6 - 1;
            } else
            if (i + 3 <= len
            &&  (n = string_get_hex(p, i + 1, 2)) >= 0) {
                c = n;
                i += 3 - 1;
            }
        }
        string_buffer_putc16(b, c);
    }
    JS_FreeValue(ctx, str);
    return string_buffer_end(b);
}

/* global object */

static const JSCFunctionListEntry js_global_funcs[] = {
    JS_CFUNC_DEF("parseInt", 2, js_parseInt ),
    JS_CFUNC_DEF("parseFloat", 1, js_parseFloat ),
    JS_CFUNC_DEF("isNaN", 1, js_global_isNaN ),
    JS_CFUNC_DEF("isFinite", 1, js_global_isFinite ),

    JS_CFUNC_MAGIC_DEF("decodeURI", 1, js_global_decodeURI, 0 ),
    JS_CFUNC_MAGIC_DEF("decodeURIComponent", 1, js_global_decodeURI, 1 ),
    JS_CFUNC_MAGIC_DEF("encodeURI", 1, js_global_encodeURI, 0 ),
    JS_CFUNC_MAGIC_DEF("encodeURIComponent", 1, js_global_encodeURI, 1 ),
    JS_CFUNC_DEF("escape", 1, js_global_escape ),
    JS_CFUNC_DEF("unescape", 1, js_global_unescape ),
    JS_PROP_DOUBLE_DEF("Infinity", std::numeric_limits<double>::infinity(), 0 ),
    JS_PROP_DOUBLE_DEF("NaN", NAN, 0 ),
    JS_PROP_UNDEFINED_DEF("undefined", 0 ),

    /* for the 'Date' implementation */
    JS_CFUNC_DEF("__date_clock", 0, js___date_clock ),
    //JS_CFUNC_DEF("__date_now", 0, js___date_now ),
    //JS_CFUNC_DEF("__date_getTimezoneOffset", 1, js___date_getTimezoneOffset ),
    //JS_CFUNC_DEF("__date_create", 3, js___date_create ),
};

/* Date */

static int64_t math_mod(int64_t a, int64_t b) {
    /* return positive modulo */
    int64_t m = a % b;
    return m + (m < 0) * b;
}

static int64_t floor_div(int64_t a, int64_t b) {
    /* integer division rounding toward -Infinity */
    int64_t m = a % b;
    return (a - (m + (m < 0) * b)) / b;
}

static JSValue js_Date_parse(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv);

[[nodiscard]] static int JS_ThisTimeValue(JSContext *ctx, double *valp, JSValueConst this_val)
{
    if (JS_VALUE_GET_TAG(this_val) == JS_TAG_OBJECT) {
        JSObject *p = JS_VALUE_GET_OBJ(this_val);
        if (p->class_id == JS_CLASS_DATE && JS_IsNumber(p->u.object_data))
            return JS_ToFloat64(ctx, valp, p->u.object_data);
    }
    JS_ThrowTypeError(ctx, "not a Date object");
    return -1;
}

static JSValue JS_SetThisTimeValue(JSContext *ctx, JSValueConst this_val, double v)
{
    if (JS_VALUE_GET_TAG(this_val) == JS_TAG_OBJECT) {
        JSObject *p = JS_VALUE_GET_OBJ(this_val);
        if (p->class_id == JS_CLASS_DATE) {
            JS_FreeValue(ctx, p->u.object_data);
            p->u.object_data = JS_NewFloat64(ctx, v);
            return JS_DupValue(ctx, p->u.object_data);
        }
    }
    return JS_ThrowTypeError(ctx, "not a Date object");
}

static int64_t days_from_year(int64_t y) {
    return 365 * (y - 1970) + floor_div(y - 1969, 4) -
        floor_div(y - 1901, 100) + floor_div(y - 1601, 400);
}

static int64_t days_in_year(int64_t y) {
    return 365 + !(y % 4) - !(y % 100) + !(y % 400);
}

/* return the year, update days */
static int64_t year_from_days(int64_t *days) {
    int64_t y, d1, nd, d = *days;
    y = floor_div(d * 10000, 3652425) + 1970;
    /* the initial approximation is very good, so only a few
       iterations are necessary */
    for(;;) {
        d1 = d - days_from_year(y);
        if (d1 < 0) {
            y--;
            d1 += days_in_year(y);
        } else {
            nd = days_in_year(y);
            if (d1 < nd)
                break;
            d1 -= nd;
            y++;
        }
    }
    *days = d1;
    return y;
}

static int const month_days[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
static char const month_names[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
static char const day_names[] = "SunMonTueWedThuFriSat";

[[nodiscard]] static int get_date_fields(JSContext *ctx, JSValueConst obj,
                                       double fields[9], int is_local, int force)
{
    double dval;
    int64_t d, days, wd, y, i, md, h, m, s, ms, tz = 0;

    if (JS_ThisTimeValue(ctx, &dval, obj))
        return -1;

    if (isnan(dval)) {
        if (!force)
            return FALSE; /* NaN */
        d = 0;        /* initialize all fields to 0 */
    } else {
        d = dval;
        if (is_local) {
            tz = -getTimezoneOffset(d);
            d += tz * 60000;
        }
    }

    /* result is >= 0, we can use % */
    h = math_mod(d, 86400000);
    days = (d - h) / 86400000;
    ms = h % 1000;
    h = (h - ms) / 1000;
    s = h % 60;
    h = (h - s) / 60;
    m = h % 60;
    h = (h - m) / 60;
    wd = math_mod(days + 4, 7); /* week day */
    y = year_from_days(&days);

    for(i = 0; i < 11; i++) {
        md = month_days[i];
        if (i == 1)
            md += days_in_year(y) - 365;
        if (days < md)
            break;
        days -= md;
    }
    fields[0] = y;
    fields[1] = i;
    fields[2] = days + 1;
    fields[3] = h;
    fields[4] = m;
    fields[5] = s;
    fields[6] = ms;
    fields[7] = wd;
    fields[8] = tz;
    return TRUE;
}

static double time_clip(double t) {
    if (t >= -8.64e15 && t <= 8.64e15)
        return trunc(t) + 0.0;  /* convert -0 to +0 */
    else
        return NAN;
}

/* The spec mandates the use of 'double' and it fixes the order
   of the operations */
static double set_date_fields(double fields[], int is_local) {
    int64_t y;
    double days, d, h, m1;
    int i, m, md;

    m1 = fields[1];
    m = fmod(m1, 12);
    if (m < 0)
        m += 12;
    y = (int64_t)(fields[0] + floor(m1 / 12));
    days = days_from_year(y);

    for(i = 0; i < m; i++) {
        md = month_days[i];
        if (i == 1)
            md += days_in_year(y) - 365;
        days += md;
    }
    days += fields[2] - 1;
    h = fields[3] * 3600000 + fields[4] * 60000 +
        fields[5] * 1000 + fields[6];
    d = days * 86400000 + h;
    if (is_local)
        d += getTimezoneOffset(d) * 60000;
    return time_clip(d);
}

static JSValue get_date_field(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv, int magic)
{
    // get_date_field(obj, n, is_local)
    double fields[9];
    int res, n, is_local;

    is_local = magic & 0x0F;
    n = (magic >> 4) & 0x0F;
    res = get_date_fields(ctx, this_val, fields, is_local, 0);
    if (res < 0)
        return JS_EXCEPTION;
    if (!res)
        return JS_NAN;

    if (magic & 0x100) {    // getYear
        fields[0] -= 1900;
    }
    return JS_NewFloat64(ctx, fields[n]);
}

static JSValue set_date_field(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv, int magic)
{
    // _field(obj, first_field, end_field, args, is_local)
    double fields[9];
    int res, first_field, end_field, is_local, i, n;
    double d, a;

    d = NAN;
    first_field = (magic >> 8) & 0x0F;
    end_field = (magic >> 4) & 0x0F;
    is_local = magic & 0x0F;

    res = get_date_fields(ctx, this_val, fields, is_local, first_field == 0);
    if (res < 0)
        return JS_EXCEPTION;
    if (res && argc > 0) {
        n = end_field - first_field;
        if (argc < n)
            n = argc;
        for(i = 0; i < n; i++) {
            if (JS_ToFloat64(ctx, &a, argv[i]))
                return JS_EXCEPTION;
            if (!isfinite(a))
                goto done;
            fields[first_field + i] = trunc(a);
        }
        d = set_date_fields(fields, is_local);
    }
done:
    return JS_SetThisTimeValue(ctx, this_val, d);
}

/* fmt:
   0: toUTCString: "Tue, 02 Jan 2018 23:04:46 GMT"
   1: toString: "Wed Jan 03 2018 00:05:22 GMT+0100 (CET)"
   2: toISOString: "2018-01-02T23:02:56.927Z"
   3: toLocaleString: "1/2/2018, 11:40:40 PM"
   part: 1=date, 2=time 3=all
   XXX: should use a variant of strftime().
 */
static JSValue get_date_string(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv, int magic)
{
    // _string(obj, fmt, part)
    char buf[64];
    double fields[9];
    int res, fmt, part, pos;
    int y, mon, d, h, m, s, ms, wd, tz;

    fmt = (magic >> 4) & 0x0F;
    part = magic & 0x0F;

    res = get_date_fields(ctx, this_val, fields, fmt & 1, 0);
    if (res < 0)
        return JS_EXCEPTION;
    if (!res) {
        if (fmt == 2)
            return JS_ThrowRangeError(ctx, "Date value is NaN");
        else
            return JS_NewString(ctx, "Invalid Date");
    }

    y = fields[0];
    mon = fields[1];
    d = fields[2];
    h = fields[3];
    m = fields[4];
    s = fields[5];
    ms = fields[6];
    wd = fields[7];
    tz = fields[8];

    pos = 0;

    if (part & 1) { /* date part */
        switch(fmt) {
        case 0:
            pos += snprintf(buf + pos, sizeof(buf) - pos,
                            "%.3s, %02d %.3s %0*d ",
                            day_names + wd * 3, d,
                            month_names + mon * 3, 4 + (y < 0), y);
            break;
        case 1:
            pos += snprintf(buf + pos, sizeof(buf) - pos,
                            "%.3s %.3s %02d %0*d",
                            day_names + wd * 3,
                            month_names + mon * 3, d, 4 + (y < 0), y);
            if (part == 3) {
                buf[pos++] = ' ';
            }
            break;
        case 2:
            if (y >= 0 && y <= 9999) {
                pos += snprintf(buf + pos, sizeof(buf) - pos,
                                "%04d", y);
            } else {
                pos += snprintf(buf + pos, sizeof(buf) - pos,
                                "%+07d", y);
            }
            pos += snprintf(buf + pos, sizeof(buf) - pos,
                            "-%02d-%02dT", mon + 1, d);
            break;
        case 3:
            pos += snprintf(buf + pos, sizeof(buf) - pos,
                            "%02d/%02d/%0*d", mon + 1, d, 4 + (y < 0), y);
            if (part == 3) {
                buf[pos++] = ',';
                buf[pos++] = ' ';
            }
            break;
        }
    }
    if (part & 2) { /* time part */
        switch(fmt) {
        case 0:
            pos += snprintf(buf + pos, sizeof(buf) - pos,
                            "%02d:%02d:%02d GMT", h, m, s);
            break;
        case 1:
            pos += snprintf(buf + pos, sizeof(buf) - pos,
                            "%02d:%02d:%02d GMT", h, m, s);
            if (tz < 0) {
                buf[pos++] = '-';
                tz = -tz;
            } else {
                buf[pos++] = '+';
            }
            /* tz is >= 0, can use % */
            pos += snprintf(buf + pos, sizeof(buf) - pos,
                            "%02d%02d", tz / 60, tz % 60);
            /* XXX: tack the time zone code? */
            break;
        case 2:
            pos += snprintf(buf + pos, sizeof(buf) - pos,
                            "%02d:%02d:%02d.%03dZ", h, m, s, ms);
            break;
        case 3:
            pos += snprintf(buf + pos, sizeof(buf) - pos,
                            "%02d:%02d:%02d %cM", (h + 1) % 12 - 1, m, s,
                            (h < 12) ? 'A' : 'P');
            break;
        }
    }
    return JS_NewStringLen(ctx, buf, pos);
}

/* OS dependent: return the UTC time in ms since 1970. */
static int64_t date_now(void) {
    struct timeval tv;
    gettimeofday(&tv, NULL);
    return (int64_t)tv.tv_sec * 1000 + (tv.tv_usec / 1000);
}

static JSValue js_date_constructor(JSContext *ctx, JSValueConst new_target,
                                   int argc, JSValueConst *argv)
{
    // Date(y, mon, d, h, m, s, ms)
    JSValue rv;
    int i, n;
    double a, val;

    if (JS_IsUndefined(new_target)) {
        /* invoked as function */
        argc = 0;
    }
    n = argc;
    if (n == 0) {
        val = date_now();
    } else if (n == 1) {
        JSValue v, dv;
        if (JS_VALUE_GET_TAG(argv[0]) == JS_TAG_OBJECT) {
            JSObject *p = JS_VALUE_GET_OBJ(argv[0]);
            if (p->class_id == JS_CLASS_DATE && JS_IsNumber(p->u.object_data)) {
                if (JS_ToFloat64(ctx, &val, p->u.object_data))
                    return JS_EXCEPTION;
                val = time_clip(val);
                goto has_val;
            }
        }
        v = JS_ToPrimitive(ctx, argv[0], HINT_NONE);
        if (JS_IsString(v)) {
            dv = js_Date_parse(ctx, JS_UNDEFINED, 1, (JSValueConst *)&v);
            JS_FreeValue(ctx, v);
            if (JS_IsException(dv))
                return JS_EXCEPTION;
            if (JS_ToFloat64Free(ctx, &val, dv))
                return JS_EXCEPTION;
        } else {
            if (JS_ToFloat64Free(ctx, &val, v))
                return JS_EXCEPTION;
        }
        val = time_clip(val);
    } else {
        double fields[] = { 0, 0, 1, 0, 0, 0, 0 };
        if (n > 7)
            n = 7;
        for(i = 0; i < n; i++) {
            if (JS_ToFloat64(ctx, &a, argv[i]))
                return JS_EXCEPTION;
            if (!isfinite(a))
                break;
            fields[i] = trunc(a);
            if (i == 0 && fields[0] >= 0 && fields[0] < 100)
                fields[0] += 1900;
        }
        val = (i == n) ? set_date_fields(fields, 1) : NAN;
    }
has_val:
#if 0
    JSValueConst args[3];
    args[0] = new_target;
    args[1] = ctx->class_proto[JS_CLASS_DATE];
    args[2] = JS_NewFloat64(ctx, val);
    rv = js___date_create(ctx, JS_UNDEFINED, 3, args);
#else
    rv = js_create_from_ctor(ctx, new_target, JS_CLASS_DATE);
    if (!JS_IsException(rv))
        JS_SetObjectData(ctx, rv, JS_NewFloat64(ctx, val));
#endif
    if (!JS_IsException(rv) && JS_IsUndefined(new_target)) {
        /* invoked as a function, return (new Date()).toString(); */
        JSValue s;
        s = get_date_string(ctx, rv, 0, NULL, 0x13);
        JS_FreeValue(ctx, rv);
        rv = s;
    }
    return rv;
}

static JSValue js_Date_UTC(JSContext *ctx, JSValueConst this_val,
                           int argc, JSValueConst *argv)
{
    // UTC(y, mon, d, h, m, s, ms)
    double fields[] = { 0, 0, 1, 0, 0, 0, 0 };
    int i, n;
    double a;

    n = argc;
    if (n == 0)
        return JS_NAN;
    if (n > 7)
        n = 7;
    for(i = 0; i < n; i++) {
        if (JS_ToFloat64(ctx, &a, argv[i]))
            return JS_EXCEPTION;
        if (!isfinite(a))
            return JS_NAN;
        fields[i] = trunc(a);
        if (i == 0 && fields[0] >= 0 && fields[0] < 100)
            fields[0] += 1900;
    }
    return JS_NewFloat64(ctx, set_date_fields(fields, 0));
}

static void string_skip_spaces(JSString *sp, int *pp) {
    while (*pp < sp->len && string_get(sp, *pp) == ' ')
        *pp += 1;
}

static void string_skip_non_spaces(JSString *sp, int *pp) {
    while (*pp < sp->len && string_get(sp, *pp) != ' ')
        *pp += 1;
}

/* parse a numeric field with an optional sign if accept_sign is TRUE */
static int string_get_digits(JSString *sp, int *pp, int64_t *pval) {
    int64_t v = 0;
    int c, p = *pp, p_start;

    if (p >= sp->len)
        return -1;
    p_start = p;
    while (p < sp->len) {
        c = string_get(sp, p);
        if (!(c >= '0' && c <= '9')) {
            if (p == p_start)
                return -1;
            else
                break;
        }
        v = v * 10 + c - '0';
        p++;
    }
    *pval = v;
    *pp = p;
    return 0;
}

static int string_get_signed_digits(JSString *sp, int *pp, int64_t *pval) {
    int res, sgn, p = *pp;

    if (p >= sp->len)
        return -1;

    sgn = string_get(sp, p);
    if (sgn == '-' || sgn == '+')
        p++;

    res = string_get_digits(sp, &p, pval);
    if (res == 0 && sgn == '-')
        *pval = -*pval;
    *pp = p;
    return res;
}

/* parse a fixed width numeric field */
static int string_get_fixed_width_digits(JSString *sp, int *pp, int n, int64_t *pval) {
    int64_t v = 0;
    int i, c, p = *pp;

    for(i = 0; i < n; i++) {
        if (p >= sp->len)
            return -1;
        c = string_get(sp, p);
        if (!(c >= '0' && c <= '9'))
            return -1;
        v = v * 10 + c - '0';
        p++;
    }
    *pval = v;
    *pp = p;
    return 0;
}

static int string_get_milliseconds(JSString *sp, int *pp, int64_t *pval) {
    /* parse milliseconds as a fractional part, round to nearest */
    /* XXX: the spec does not indicate which rounding should be used */
    int mul = 1000, ms = 0, p = *pp, c, p_start;
    if (p >= sp->len)
        return -1;
    p_start = p;
    while (p < sp->len) {
        c = string_get(sp, p);
        if (!(c >= '0' && c <= '9')) {
            if (p == p_start)
                return -1;
            else
                break;
        }
        if (mul == 1 && c >= '5')
            ms += 1;
        ms += (c - '0') * (mul /= 10);
        p++;
    }
    *pval = ms;
    *pp = p;
    return 0;
}


static int find_abbrev(JSString *sp, int p, const char *list, int count) {
    int n, i;

    if (p + 3 <= sp->len) {
        for (n = 0; n < count; n++) {
            for (i = 0; i < 3; i++) {
                if (string_get(sp, p + i) != month_names[n * 3 + i])
                    goto next;
            }
            return n;
        next:;
        }
    }
    return -1;
}

static int string_get_month(JSString *sp, int *pp, int64_t *pval) {
    int n;

    string_skip_spaces(sp, pp);
    n = find_abbrev(sp, *pp, month_names, 12);
    if (n < 0)
        return -1;

    *pval = n;
    *pp += 3;
    return 0;
}

static JSValue js_Date_parse(JSContext *ctx, JSValueConst this_val,
                             int argc, JSValueConst *argv)
{
    // parse(s)
    JSValue s, rv;
    int64_t fields[] = { 0, 1, 1, 0, 0, 0, 0 };
    double fields1[7];
    int64_t tz, hh, mm;
    double d;
    int p, i, c, sgn, l;
    JSString *sp;
    BOOL is_local;

    rv = JS_NAN;

    s = JS_ToString(ctx, argv[0]);
    if (JS_IsException(s))
        return JS_EXCEPTION;

    sp = JS_VALUE_GET_STRING(s);
    p = 0;
    if (p < sp->len && (((c = string_get(sp, p)) >= '0' && c <= '9') || c == '+' || c == '-')) {
        /* ISO format */
        /* year field can be negative */
        if (string_get_signed_digits(sp, &p, &fields[0]))
            goto done;

        for (i = 1; i < 7; i++) {
            if (p >= sp->len)
                break;
            switch(i) {
            case 1:
            case 2:
                c = '-';
                break;
            case 3:
                c = 'T';
                break;
            case 4:
            case 5:
                c = ':';
                break;
            case 6:
                c = '.';
                break;
            }
            if (string_get(sp, p) != c)
                break;
            p++;
            if (i == 6) {
                if (string_get_milliseconds(sp, &p, &fields[i]))
                    goto done;
            } else {
                if (string_get_digits(sp, &p, &fields[i]))
                    goto done;
            }
        }
        /* no time: UTC by default */
        is_local = (i > 3);
        fields[1] -= 1;

        /* parse the time zone offset if present: [+-]HH:mm or [+-]HHmm */
        tz = 0;
        if (p < sp->len) {
            sgn = string_get(sp, p);
            if (sgn == '+' || sgn == '-') {
                p++;
                l = sp->len - p;
                if (l != 4 && l != 5)
                    goto done;
                if (string_get_fixed_width_digits(sp, &p, 2, &hh))
                    goto done;
                if (l == 5) {
                    if (string_get(sp, p) != ':')
                        goto done;
                    p++;
                }
                if (string_get_fixed_width_digits(sp, &p, 2, &mm))
                    goto done;
                tz = hh * 60 + mm;
                if (sgn == '-')
                    tz = -tz;
                is_local = FALSE;
            } else if (sgn == 'Z') {
                p++;
                is_local = FALSE;
            } else {
                goto done;
            }
            /* error if extraneous characters */
            if (p != sp->len)
                goto done;
        }
    } else {
        /* toString or toUTCString format */
        /* skip the day of the week */
        string_skip_non_spaces(sp, &p);
        string_skip_spaces(sp, &p);
        if (p >= sp->len)
            goto done;
        c = string_get(sp, p);
        if (c >= '0' && c <= '9') {
            /* day of month first */
            if (string_get_digits(sp, &p, &fields[2]))
                goto done;
            if (string_get_month(sp, &p, &fields[1]))
                goto done;
        } else {
            /* month first */
            if (string_get_month(sp, &p, &fields[1]))
                goto done;
            string_skip_spaces(sp, &p);
            if (string_get_digits(sp, &p, &fields[2]))
                goto done;
        }
        /* year */
        string_skip_spaces(sp, &p);
        if (string_get_signed_digits(sp, &p, &fields[0]))
            goto done;

        /* hour, min, seconds */
        string_skip_spaces(sp, &p);
        for(i = 0; i < 3; i++) {
            if (i == 1 || i == 2) {
                if (p >= sp->len)
                    goto done;
                if (string_get(sp, p) != ':')
                    goto done;
                p++;
            }
            if (string_get_digits(sp, &p, &fields[3 + i]))
                goto done;
        }
        // XXX: parse optional milliseconds?

        /* parse the time zone offset if present: [+-]HHmm */
        is_local = FALSE;
        tz = 0;
        for (tz = 0; p < sp->len; p++) {
            sgn = string_get(sp, p);
            if (sgn == '+' || sgn == '-') {
                p++;
                if (string_get_fixed_width_digits(sp, &p, 2, &hh))
                    goto done;
                if (string_get_fixed_width_digits(sp, &p, 2, &mm))
                    goto done;
                tz = hh * 60 + mm;
                if (sgn == '-')
                    tz = -tz;
                break;
            }
        }
    }
    for(i = 0; i < 7; i++)
        fields1[i] = fields[i];
    d = set_date_fields(fields1, is_local) - tz * 60000;
    rv = JS_NewFloat64(ctx, d);

done:
    JS_FreeValue(ctx, s);
    return rv;
}

static JSValue js_Date_now(JSContext *ctx, JSValueConst this_val,
                           int argc, JSValueConst *argv)
{
    // now()
    return JS_NewInt64(ctx, date_now());
}

static JSValue js_date_Symbol_toPrimitive(JSContext *ctx, JSValueConst this_val,
                                          int argc, JSValueConst *argv)
{
    // Symbol_toPrimitive(hint)
    JSValueConst obj = this_val;
    JSAtom hint = JS_ATOM_NULL;
    int hint_num;

    if (!JS_IsObject(obj))
        return JS_ThrowTypeErrorNotAnObject(ctx);

    if (JS_IsString(argv[0])) {
        hint = JS_ValueToAtom(ctx, argv[0]);
        if (hint == JS_ATOM_NULL)
            return JS_EXCEPTION;
        JS_FreeAtom(ctx, hint);
    }
    switch (hint) {
    case JS_ATOM_number:
#ifdef CONFIG_BIGNUM
    case JS_ATOM_integer:
#endif
        hint_num = HINT_NUMBER;
        break;
    case JS_ATOM_string:
    case JS_ATOM_default:
        hint_num = HINT_STRING;
        break;
    default:
        return JS_ThrowTypeError(ctx, "invalid hint");
    }
    return JS_ToPrimitive(ctx, obj, hint_num | HINT_FORCE_ORDINARY);
}

static JSValue js_date_getTimezoneOffset(JSContext *ctx, JSValueConst this_val,
                                         int argc, JSValueConst *argv)
{
    // getTimezoneOffset()
    double v;

    if (JS_ThisTimeValue(ctx, &v, this_val))
        return JS_EXCEPTION;
    if (isnan(v))
        return JS_NAN;
    else
        return JS_NewInt64(ctx, getTimezoneOffset((int64_t)trunc(v)));
}

static JSValue js_date_getTime(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv)
{
    // getTime()
    double v;

    if (JS_ThisTimeValue(ctx, &v, this_val))
        return JS_EXCEPTION;
    return JS_NewFloat64(ctx, v);
}

static JSValue js_date_setTime(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv)
{
    // setTime(v)
    double v;

    if (JS_ThisTimeValue(ctx, &v, this_val) || JS_ToFloat64(ctx, &v, argv[0]))
        return JS_EXCEPTION;
    return JS_SetThisTimeValue(ctx, this_val, time_clip(v));
}

static JSValue js_date_setYear(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv)
{
    // setYear(y)
    double y;
    JSValueConst args[1];

    if (JS_ThisTimeValue(ctx, &y, this_val) || JS_ToFloat64(ctx, &y, argv[0]))
        return JS_EXCEPTION;
    y = +y;
    if (isfinite(y)) {
        y = trunc(y);
        if (y >= 0 && y < 100)
            y += 1900;
    }
    args[0] = JS_NewFloat64(ctx, y);
    return set_date_field(ctx, this_val, 1, args, 0x011);
}

static JSValue js_date_toJSON(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv)
{
    // toJSON(key)
    JSValue obj, tv, method, rv;
    double d;

    rv = JS_EXCEPTION;
    tv = JS_UNDEFINED;

    obj = JS_ToObject(ctx, this_val);
    tv = JS_ToPrimitive(ctx, obj, HINT_NUMBER);
    if (JS_IsException(tv))
        goto exception;
    if (JS_IsNumber(tv)) {
        if (JS_ToFloat64(ctx, &d, tv) < 0)
            goto exception;
        if (!isfinite(d)) {
            rv = JS_NULL;
            goto done;
        }
    }
    method = JS_GetPropertyStr(ctx, obj, "toISOString");
    if (JS_IsException(method))
        goto exception;
    if (!JS_IsFunction(ctx, method)) {
        JS_ThrowTypeError(ctx, "object needs toISOString method");
        JS_FreeValue(ctx, method);
        goto exception;
    }
    rv = JS_CallFree(ctx, method, obj, 0, NULL);
exception:
done:
    JS_FreeValue(ctx, obj);
    JS_FreeValue(ctx, tv);
    return rv;
}

static const JSCFunctionListEntry js_date_funcs[] = {
    JS_CFUNC_DEF("now", 0, js_Date_now ),
    JS_CFUNC_DEF("parse", 1, js_Date_parse ),
    JS_CFUNC_DEF("UTC", 7, js_Date_UTC ),
};

static const JSCFunctionListEntry js_date_proto_funcs[] = {
    JS_CFUNC_DEF("valueOf", 0, js_date_getTime ),
    JS_CFUNC_MAGIC_DEF("toString", 0, get_date_string, 0x13 ),
    JS_CFUNC_DEF("[Symbol.toPrimitive]", 1, js_date_Symbol_toPrimitive ),
    JS_CFUNC_MAGIC_DEF("toUTCString", 0, get_date_string, 0x03 ),
    JS_ALIAS_DEF("toGMTString", "toUTCString" ),
    JS_CFUNC_MAGIC_DEF("toISOString", 0, get_date_string, 0x23 ),
    JS_CFUNC_MAGIC_DEF("toDateString", 0, get_date_string, 0x11 ),
    JS_CFUNC_MAGIC_DEF("toTimeString", 0, get_date_string, 0x12 ),
    JS_CFUNC_MAGIC_DEF("toLocaleString", 0, get_date_string, 0x33 ),
    JS_CFUNC_MAGIC_DEF("toLocaleDateString", 0, get_date_string, 0x31 ),
    JS_CFUNC_MAGIC_DEF("toLocaleTimeString", 0, get_date_string, 0x32 ),
    JS_CFUNC_DEF("getTimezoneOffset", 0, js_date_getTimezoneOffset ),
    JS_CFUNC_DEF("getTime", 0, js_date_getTime ),
    JS_CFUNC_MAGIC_DEF("getYear", 0, get_date_field, 0x101 ),
    JS_CFUNC_MAGIC_DEF("getFullYear", 0, get_date_field, 0x01 ),
    JS_CFUNC_MAGIC_DEF("getUTCFullYear", 0, get_date_field, 0x00 ),
    JS_CFUNC_MAGIC_DEF("getMonth", 0, get_date_field, 0x11 ),
    JS_CFUNC_MAGIC_DEF("getUTCMonth", 0, get_date_field, 0x10 ),
    JS_CFUNC_MAGIC_DEF("getDate", 0, get_date_field, 0x21 ),
    JS_CFUNC_MAGIC_DEF("getUTCDate", 0, get_date_field, 0x20 ),
    JS_CFUNC_MAGIC_DEF("getHours", 0, get_date_field, 0x31 ),
    JS_CFUNC_MAGIC_DEF("getUTCHours", 0, get_date_field, 0x30 ),
    JS_CFUNC_MAGIC_DEF("getMinutes", 0, get_date_field, 0x41 ),
    JS_CFUNC_MAGIC_DEF("getUTCMinutes", 0, get_date_field, 0x40 ),
    JS_CFUNC_MAGIC_DEF("getSeconds", 0, get_date_field, 0x51 ),
    JS_CFUNC_MAGIC_DEF("getUTCSeconds", 0, get_date_field, 0x50 ),
    JS_CFUNC_MAGIC_DEF("getMilliseconds", 0, get_date_field, 0x61 ),
    JS_CFUNC_MAGIC_DEF("getUTCMilliseconds", 0, get_date_field, 0x60 ),
    JS_CFUNC_MAGIC_DEF("getDay", 0, get_date_field, 0x71 ),
    JS_CFUNC_MAGIC_DEF("getUTCDay", 0, get_date_field, 0x70 ),
    JS_CFUNC_DEF("setTime", 1, js_date_setTime ),
    JS_CFUNC_MAGIC_DEF("setMilliseconds", 1, set_date_field, 0x671 ),
    JS_CFUNC_MAGIC_DEF("setUTCMilliseconds", 1, set_date_field, 0x670 ),
    JS_CFUNC_MAGIC_DEF("setSeconds", 2, set_date_field, 0x571 ),
    JS_CFUNC_MAGIC_DEF("setUTCSeconds", 2, set_date_field, 0x570 ),
    JS_CFUNC_MAGIC_DEF("setMinutes", 3, set_date_field, 0x471 ),
    JS_CFUNC_MAGIC_DEF("setUTCMinutes", 3, set_date_field, 0x470 ),
    JS_CFUNC_MAGIC_DEF("setHours", 4, set_date_field, 0x371 ),
    JS_CFUNC_MAGIC_DEF("setUTCHours", 4, set_date_field, 0x370 ),
    JS_CFUNC_MAGIC_DEF("setDate", 1, set_date_field, 0x231 ),
    JS_CFUNC_MAGIC_DEF("setUTCDate", 1, set_date_field, 0x230 ),
    JS_CFUNC_MAGIC_DEF("setMonth", 2, set_date_field, 0x131 ),
    JS_CFUNC_MAGIC_DEF("setUTCMonth", 2, set_date_field, 0x130 ),
    JS_CFUNC_DEF("setYear", 1, js_date_setYear ),
    JS_CFUNC_MAGIC_DEF("setFullYear", 3, set_date_field, 0x031 ),
    JS_CFUNC_MAGIC_DEF("setUTCFullYear", 3, set_date_field, 0x030 ),
    JS_CFUNC_DEF("toJSON", 1, js_date_toJSON ),
};

inline void JS_AddIntrinsicDate(JSContext *ctx)
{
    JSValueConst obj;

    /* Date */
    ctx->class_proto[JS_CLASS_DATE] = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_DATE], js_date_proto_funcs,
                               countof(js_date_proto_funcs));
    obj = JS_NewGlobalCConstructor(ctx, "Date", js_date_constructor, 7,
                                   ctx->class_proto[JS_CLASS_DATE]);
    JS_SetPropertyFunctionList(ctx, obj, js_date_funcs, countof(js_date_funcs));
}

/* eval */

inline void JS_AddIntrinsicEval(JSContext *ctx)
{
    ctx->eval_internal = __JS_EvalInternal;
}

#ifdef CONFIG_BIGNUM

/* Operators */

static void js_operator_set_finalizer(JSRuntime *rt, JSValue val)
{
    JSOperatorSetData *opset = JS_GetOpaque(val, JS_CLASS_OPERATOR_SET);
    int i, j;
    JSBinaryOperatorDefEntry *ent;

    if (opset) {
        for(i = 0; i < JS_OVOP_COUNT; i++) {
            if (opset->self_ops[i])
                JS_FreeValueRT(rt, JS_MKPTR(JS_TAG_OBJECT, opset->self_ops[i]));
        }
        for(j = 0; j < opset->left.count; j++) {
            ent = &opset->left.tab[j];
            for(i = 0; i < JS_OVOP_BINARY_COUNT; i++) {
                if (ent->ops[i])
                    JS_FreeValueRT(rt, JS_MKPTR(JS_TAG_OBJECT, ent->ops[i]));
            }
        }
        js_free_rt(rt, opset->left.tab);
        for(j = 0; j < opset->right.count; j++) {
            ent = &opset->right.tab[j];
            for(i = 0; i < JS_OVOP_BINARY_COUNT; i++) {
                if (ent->ops[i])
                    JS_FreeValueRT(rt, JS_MKPTR(JS_TAG_OBJECT, ent->ops[i]));
            }
        }
        js_free_rt(rt, opset->right.tab);
        js_free_rt(rt, opset);
    }
}

static void js_operator_set_mark(JSRuntime *rt, JSValueConst val,
                                 JS_MarkFunc *mark_func)
{
    JSOperatorSetData *opset = JS_GetOpaque(val, JS_CLASS_OPERATOR_SET);
    int i, j;
    JSBinaryOperatorDefEntry *ent;

    if (opset) {
        for(i = 0; i < JS_OVOP_COUNT; i++) {
            if (opset->self_ops[i])
                JS_MarkValue(rt, JS_MKPTR(JS_TAG_OBJECT, opset->self_ops[i]),
                             mark_func);
        }
        for(j = 0; j < opset->left.count; j++) {
            ent = &opset->left.tab[j];
            for(i = 0; i < JS_OVOP_BINARY_COUNT; i++) {
                if (ent->ops[i])
                    JS_MarkValue(rt, JS_MKPTR(JS_TAG_OBJECT, ent->ops[i]),
                                 mark_func);
            }
        }
        for(j = 0; j < opset->right.count; j++) {
            ent = &opset->right.tab[j];
            for(i = 0; i < JS_OVOP_BINARY_COUNT; i++) {
                if (ent->ops[i])
                    JS_MarkValue(rt, JS_MKPTR(JS_TAG_OBJECT, ent->ops[i]),
                                 mark_func);
            }
        }
    }
}


/* create an OperatorSet object */
static JSValue js_operators_create_internal(JSContext *ctx,
                                            int argc, JSValueConst *argv,
                                            BOOL is_primitive)
{
    JSValue opset_obj, prop, obj;
    JSOperatorSetData *opset, *opset1;
    JSBinaryOperatorDef *def;
    JSValueConst arg;
    int i, j;
    JSBinaryOperatorDefEntry *new_tab;
    JSBinaryOperatorDefEntry *ent;
    uint32_t op_count;

    if (ctx->rt->operator_count == UINT32_MAX) {
        return JS_ThrowTypeError(ctx, "too many operators");
    }
    opset_obj = JS_NewObjectProtoClass(ctx, JS_NULL, JS_CLASS_OPERATOR_SET);
    if (JS_IsException(opset_obj))
        goto fail;
    opset = js_mallocz(ctx, sizeof(*opset));
    if (!opset)
        goto fail;
    JS_SetOpaque(opset_obj, opset);
    if (argc >= 1) {
        arg = argv[0];
        /* self operators */
        for(i = 0; i < JS_OVOP_COUNT; i++) {
            prop = JS_GetPropertyStr(ctx, arg, js_overloadable_operator_names[i]);
            if (JS_IsException(prop))
                goto fail;
            if (!JS_IsUndefined(prop)) {
                if (check_function(ctx, prop)) {
                    JS_FreeValue(ctx, prop);
                    goto fail;
                }
                opset->self_ops[i] = JS_VALUE_GET_OBJ(prop);
            }
        }
    }
    /* left & right operators */
    for(j = 1; j < argc; j++) {
        arg = argv[j];
        prop = JS_GetPropertyStr(ctx, arg, "left");
        if (JS_IsException(prop))
            goto fail;
        def = &opset->right;
        if (JS_IsUndefined(prop)) {
            prop = JS_GetPropertyStr(ctx, arg, "right");
            if (JS_IsException(prop))
                goto fail;
            if (JS_IsUndefined(prop)) {
                JS_ThrowTypeError(ctx, "left or right property must be present");
                goto fail;
            }
            def = &opset->left;
        }
        /* get the operator set */
        obj = JS_GetProperty(ctx, prop, JS_ATOM_prototype);
        JS_FreeValue(ctx, prop);
        if (JS_IsException(obj))
            goto fail;
        prop = JS_GetProperty(ctx, obj, JS_ATOM_Symbol_operatorSet);
        JS_FreeValue(ctx, obj);
        if (JS_IsException(prop))
            goto fail;
        opset1 = JS_GetOpaque2(ctx, prop, JS_CLASS_OPERATOR_SET);
        if (!opset1) {
            JS_FreeValue(ctx, prop);
            goto fail;
        }
        op_count = opset1->operator_counter;
        JS_FreeValue(ctx, prop);

        /* we assume there are few entries */
        new_tab = js_realloc(ctx, def->tab,
                             (def->count + 1) * sizeof(def->tab[0]));
        if (!new_tab)
            goto fail;
        def->tab = new_tab;
        def->count++;
        ent = def->tab + def->count - 1;
        memset(ent, 0, sizeof(def->tab[0]));
        ent->operator_index = op_count;

        for(i = 0; i < JS_OVOP_BINARY_COUNT; i++) {
            prop = JS_GetPropertyStr(ctx, arg,
                                     js_overloadable_operator_names[i]);
            if (JS_IsException(prop))
                goto fail;
            if (!JS_IsUndefined(prop)) {
                if (check_function(ctx, prop)) {
                    JS_FreeValue(ctx, prop);
                    goto fail;
                }
                ent->ops[i] = JS_VALUE_GET_OBJ(prop);
            }
        }
    }
    opset->is_primitive = is_primitive;
    opset->operator_counter = ctx->rt->operator_count++;
    return opset_obj;
 fail:
    JS_FreeValue(ctx, opset_obj);
    return JS_EXCEPTION;
}

static JSValue js_operators_create(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    return js_operators_create_internal(ctx, argc, argv, FALSE);
}

static JSValue js_operators_updateBigIntOperators(JSContext *ctx, JSValueConst this_val,
                                                  int argc, JSValueConst *argv)
{
    JSValue opset_obj, prop;
    JSOperatorSetData *opset;
    const JSOverloadableOperatorEnum ops[2] = { JS_OVOP_DIV, JS_OVOP_POW };
    JSOverloadableOperatorEnum op;
    int i;

    opset_obj = JS_GetProperty(ctx, ctx->class_proto[JS_CLASS_BIG_INT],
                               JS_ATOM_Symbol_operatorSet);
    if (JS_IsException(opset_obj))
        goto fail;
    opset = JS_GetOpaque2(ctx, opset_obj, JS_CLASS_OPERATOR_SET);
    if (!opset)
        goto fail;
    for(i = 0; i < countof(ops); i++) {
        op = ops[i];
        prop = JS_GetPropertyStr(ctx, argv[0],
                                 js_overloadable_operator_names[op]);
        if (JS_IsException(prop))
            goto fail;
        if (!JS_IsUndefined(prop)) {
            if (!JS_IsNull(prop) && check_function(ctx, prop)) {
                JS_FreeValue(ctx, prop);
                goto fail;
            }
            if (opset->self_ops[op])
                JS_FreeValue(ctx, JS_MKPTR(JS_TAG_OBJECT, opset->self_ops[op]));
            if (JS_IsNull(prop)) {
                opset->self_ops[op] = NULL;
            } else {
                opset->self_ops[op] = JS_VALUE_GET_PTR(prop);
            }
        }
    }
    JS_FreeValue(ctx, opset_obj);
    return JS_UNDEFINED;
 fail:
    JS_FreeValue(ctx, opset_obj);
    return JS_EXCEPTION;
}

static int js_operators_set_default(JSContext *ctx, JSValueConst obj)
{
    JSValue opset_obj;

    if (!JS_IsObject(obj)) /* in case the prototype is not defined */
        return 0;
    opset_obj = js_operators_create_internal(ctx, 0, NULL, TRUE);
    if (JS_IsException(opset_obj))
        return -1;
    /* cannot be modified by the user */
    JS_DefinePropertyValue(ctx, obj, JS_ATOM_Symbol_operatorSet,
                           opset_obj, 0);
    return 0;
}

static JSValue js_dummy_operators_ctor(JSContext *ctx, JSValueConst new_target,
                                       int argc, JSValueConst *argv)
{
    return js_create_from_ctor(ctx, new_target, JS_CLASS_OBJECT);
}

static JSValue js_global_operators(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    JSValue func_obj, proto, opset_obj;

    func_obj = JS_UNDEFINED;
    proto = JS_NewObject(ctx);
    if (JS_IsException(proto))
        return JS_EXCEPTION;
    opset_obj = js_operators_create_internal(ctx, argc, argv, FALSE);
    if (JS_IsException(opset_obj))
        goto fail;
    JS_DefinePropertyValue(ctx, proto, JS_ATOM_Symbol_operatorSet,
                           opset_obj, JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
    func_obj = JS_NewCFunction2(ctx, js_dummy_operators_ctor, "Operators",
                                0, JS_CFUNC_constructor, 0);
    if (JS_IsException(func_obj))
        goto fail;
    JS_SetConstructor2(ctx, func_obj, proto,
                       0, JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
    JS_FreeValue(ctx, proto);
    return func_obj;
 fail:
    JS_FreeValue(ctx, proto);
    JS_FreeValue(ctx, func_obj);
    return JS_EXCEPTION;
}

static const JSCFunctionListEntry js_operators_funcs[] = {
    JS_CFUNC_DEF("create", 1, js_operators_create ),
    JS_CFUNC_DEF("updateBigIntOperators", 2, js_operators_updateBigIntOperators ),
};

/* must be called after all overloadable base types are initialized */
void JS_AddIntrinsicOperators(JSContext *ctx)
{
    JSValue obj;

    ctx->allow_operator_overloading = TRUE;
    obj = JS_NewCFunction(ctx, js_global_operators, "Operators", 1);
    JS_SetPropertyFunctionList(ctx, obj,
                               js_operators_funcs,
                               countof(js_operators_funcs));
    JS_DefinePropertyValue(ctx, ctx->global_obj, JS_ATOM_Operators,
                           obj,
                           JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
    /* add default operatorSets */
    js_operators_set_default(ctx, ctx->class_proto[JS_CLASS_BOOLEAN]);
    js_operators_set_default(ctx, ctx->class_proto[JS_CLASS_NUMBER]);
    js_operators_set_default(ctx, ctx->class_proto[JS_CLASS_STRING]);
    js_operators_set_default(ctx, ctx->class_proto[JS_CLASS_BIG_INT]);
    js_operators_set_default(ctx, ctx->class_proto[JS_CLASS_BIG_FLOAT]);
    js_operators_set_default(ctx, ctx->class_proto[JS_CLASS_BIG_DECIMAL]);
}

/* BigInt */

static JSValue JS_ToBigIntCtorFree(JSContext *ctx, JSValue val)
{
    uint32_t tag;

 redo:
    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_INT:
    case JS_TAG_BOOL:
        val = JS_NewBigInt64(ctx, JS_VALUE_GET_INT(val));
        break;
    case JS_TAG_BIG_INT:
        break;
    case JS_TAG_FLOAT64:
    case JS_TAG_BIG_FLOAT:
        {
            bf_t *a, a_s;

            a = JS_ToBigFloat(ctx, &a_s, val);
            if (!bf_is_finite(a)) {
                JS_FreeValue(ctx, val);
                val = JS_ThrowRangeError(ctx, "cannot convert NaN or Infinity to bigint");
            } else {
                JSValue val1 = JS_NewBigInt(ctx);
                bf_t *r;
                int ret;
                if (JS_IsException(val1)) {
                    JS_FreeValue(ctx, val);
                    return JS_EXCEPTION;
                }
                r = JS_GetBigInt(val1);
                ret = bf_set(r, a);
                ret |= bf_rint(r, BF_RNDZ);
                JS_FreeValue(ctx, val);
                if (ret & BF_ST_MEM_ERROR) {
                    JS_FreeValue(ctx, val1);
                    val = JS_ThrowOutOfMemory(ctx);
                } else if (ret & BF_ST_INEXACT) {
                    JS_FreeValue(ctx, val1);
                    val = JS_ThrowRangeError(ctx, "cannot convert to bigint: not an integer");
                } else {
                    val = JS_CompactBigInt(ctx, val1);
                }
            }
            if (a == &a_s)
                bf_delete(a);
        }
        break;
    case JS_TAG_BIG_DECIMAL:
        val = JS_ToStringFree(ctx, val);
         if (JS_IsException(val))
            break;
        goto redo;
    case JS_TAG_STRING:
        val = JS_StringToBigIntErr(ctx, val);
        break;
    case JS_TAG_OBJECT:
        val = JS_ToPrimitiveFree(ctx, val, HINT_NUMBER);
        if (JS_IsException(val))
            break;
        goto redo;
    case JS_TAG_NULL:
    case JS_TAG_UNDEFINED:
    default:
        JS_FreeValue(ctx, val);
        return JS_ThrowTypeError(ctx, "cannot convert to bigint");
    }
    return val;
}

static JSValue js_bigint_constructor(JSContext *ctx,
                                     JSValueConst new_target,
                                     int argc, JSValueConst *argv)
{
    if (!JS_IsUndefined(new_target))
        return JS_ThrowTypeError(ctx, "not a constructor");
    return JS_ToBigIntCtorFree(ctx, JS_DupValue(ctx, argv[0]));
}

static JSValue js_thisBigIntValue(JSContext *ctx, JSValueConst this_val)
{
    if (JS_IsBigInt(ctx, this_val))
        return JS_DupValue(ctx, this_val);

    if (JS_VALUE_GET_TAG(this_val) == JS_TAG_OBJECT) {
        JSObject *p = JS_VALUE_GET_OBJ(this_val);
        if (p->class_id == JS_CLASS_BIG_INT) {
            if (JS_IsBigInt(ctx, p->u.object_data))
                return JS_DupValue(ctx, p->u.object_data);
        }
    }
    return JS_ThrowTypeError(ctx, "not a bigint");
}

static JSValue js_bigint_toString(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    JSValue val;
    int base;
    JSValue ret;

    val = js_thisBigIntValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    if (argc == 0 || JS_IsUndefined(argv[0])) {
        base = 10;
    } else {
        base = js_get_radix(ctx, argv[0]);
        if (base < 0)
            goto fail;
    }
    ret = js_bigint_to_string1(ctx, val, base);
    JS_FreeValue(ctx, val);
    return ret;
 fail:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static JSValue js_bigint_valueOf(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    return js_thisBigIntValue(ctx, this_val);
}

static JSValue js_bigint_div(JSContext *ctx,
                              JSValueConst this_val,
                              int argc, JSValueConst *argv, int magic)
{
    bf_t a_s, b_s, *a, *b, *r, *q;
    int status;
    JSValue q_val, r_val;

    q_val = JS_NewBigInt(ctx);
    if (JS_IsException(q_val))
        return JS_EXCEPTION;
    r_val = JS_NewBigInt(ctx);
    if (JS_IsException(r_val))
        goto fail;
    b = NULL;
    a = JS_ToBigInt(ctx, &a_s, argv[0]);
    if (!a)
        goto fail;
    b = JS_ToBigInt(ctx, &b_s, argv[1]);
    if (!b) {
        JS_FreeBigInt(ctx, a, &a_s);
        goto fail;
    }
    q = JS_GetBigInt(q_val);
    r = JS_GetBigInt(r_val);
    status = bf_divrem(q, r, a, b, BF_PREC_INF, BF_RNDZ, magic & 0xf);
    JS_FreeBigInt(ctx, a, &a_s);
    JS_FreeBigInt(ctx, b, &b_s);
    if (js_unlikely(status)) {
        throw_bf_exception(ctx, status);
        goto fail;
    }
    q_val = JS_CompactBigInt(ctx, q_val);
    if (magic & 0x10) {
        JSValue ret;
        ret = JS_NewArray(ctx);
        if (JS_IsException(ret))
            goto fail;
        JS_SetPropertyUint32(ctx, ret, 0, q_val);
        JS_SetPropertyUint32(ctx, ret, 1, JS_CompactBigInt(ctx, r_val));
        return ret;
    } else {
        JS_FreeValue(ctx, r_val);
        return q_val;
    }
 fail:
    JS_FreeValue(ctx, q_val);
    JS_FreeValue(ctx, r_val);
    return JS_EXCEPTION;
}

static JSValue js_bigint_sqrt(JSContext *ctx,
                               JSValueConst this_val,
                               int argc, JSValueConst *argv, int magic)
{
    bf_t a_s, *a, *r, *rem;
    int status;
    JSValue r_val, rem_val;

    r_val = JS_NewBigInt(ctx);
    if (JS_IsException(r_val))
        return JS_EXCEPTION;
    rem_val = JS_NewBigInt(ctx);
    if (JS_IsException(rem_val))
        return JS_EXCEPTION;
    r = JS_GetBigInt(r_val);
    rem = JS_GetBigInt(rem_val);

    a = JS_ToBigInt(ctx, &a_s, argv[0]);
    if (!a)
        goto fail;
    status = bf_sqrtrem(r, rem, a);
    JS_FreeBigInt(ctx, a, &a_s);
    if (js_unlikely(status & ~BF_ST_INEXACT)) {
        throw_bf_exception(ctx, status);
        goto fail;
    }
    r_val = JS_CompactBigInt(ctx, r_val);
    if (magic) {
        JSValue ret;
        ret = JS_NewArray(ctx);
        if (JS_IsException(ret))
            goto fail;
        JS_SetPropertyUint32(ctx, ret, 0, r_val);
        JS_SetPropertyUint32(ctx, ret, 1, JS_CompactBigInt(ctx, rem_val));
        return ret;
    } else {
        JS_FreeValue(ctx, rem_val);
        return r_val;
    }
 fail:
    JS_FreeValue(ctx, r_val);
    JS_FreeValue(ctx, rem_val);
    return JS_EXCEPTION;
}

static JSValue js_bigint_op1(JSContext *ctx,
                              JSValueConst this_val,
                              int argc, JSValueConst *argv,
                              int magic)
{
    bf_t a_s, *a;
    int64_t res;

    a = JS_ToBigInt(ctx, &a_s, argv[0]);
    if (!a)
        return JS_EXCEPTION;
    switch(magic) {
    case 0: /* floorLog2 */
        if (a->sign || a->expn <= 0) {
            res = -1;
        } else {
            res = a->expn - 1;
        }
        break;
    case 1: /* ctz */
        if (bf_is_zero(a)) {
            res = -1;
        } else {
            res = bf_get_exp_min(a);
        }
        break;
    default:
        abort();
    }
    JS_FreeBigInt(ctx, a, &a_s);
    return JS_NewBigInt64(ctx, res);
}

static JSValue js_bigint_asUintN(JSContext *ctx,
                                  JSValueConst this_val,
                                  int argc, JSValueConst *argv, int asIntN)
{
    uint64_t bits;
    bf_t a_s, *a = &a_s, *r, mask_s, *mask = &mask_s;
    JSValue res;

    if (JS_ToIndex(ctx, &bits, argv[0]))
        return JS_EXCEPTION;
    res = JS_NewBigInt(ctx);
    if (JS_IsException(res))
        return JS_EXCEPTION;
    r = JS_GetBigInt(res);
    a = JS_ToBigInt(ctx, &a_s, argv[1]);
    if (!a) {
        JS_FreeValue(ctx, res);
        return JS_EXCEPTION;
    }
    /* XXX: optimize */
    r = JS_GetBigInt(res);
    bf_init(ctx->bf_ctx, mask);
    bf_set_ui(mask, 1);
    bf_mul_2exp(mask, bits, BF_PREC_INF, BF_RNDZ);
    bf_add_si(mask, mask, -1, BF_PREC_INF, BF_RNDZ);
    bf_logic_and(r, a, mask);
    if (asIntN && bits != 0) {
        bf_set_ui(mask, 1);
        bf_mul_2exp(mask, bits - 1, BF_PREC_INF, BF_RNDZ);
        if (bf_cmpu(r, mask) >= 0) {
            bf_set_ui(mask, 1);
            bf_mul_2exp(mask, bits, BF_PREC_INF, BF_RNDZ);
            bf_sub(r, r, mask, BF_PREC_INF, BF_RNDZ);
        }
    }
    bf_delete(mask);
    JS_FreeBigInt(ctx, a, &a_s);
    return JS_CompactBigInt(ctx, res);
}

static const JSCFunctionListEntry js_bigint_funcs[] = {
    JS_CFUNC_MAGIC_DEF("asUintN", 2, js_bigint_asUintN, 0 ),
    JS_CFUNC_MAGIC_DEF("asIntN", 2, js_bigint_asUintN, 1 ),
    /* QuickJS extensions */
    JS_CFUNC_MAGIC_DEF("tdiv", 2, js_bigint_div, BF_RNDZ ),
    JS_CFUNC_MAGIC_DEF("fdiv", 2, js_bigint_div, BF_RNDD ),
    JS_CFUNC_MAGIC_DEF("cdiv", 2, js_bigint_div, BF_RNDU ),
    JS_CFUNC_MAGIC_DEF("ediv", 2, js_bigint_div, BF_DIVREM_EUCLIDIAN ),
    JS_CFUNC_MAGIC_DEF("tdivrem", 2, js_bigint_div, BF_RNDZ | 0x10 ),
    JS_CFUNC_MAGIC_DEF("fdivrem", 2, js_bigint_div, BF_RNDD | 0x10 ),
    JS_CFUNC_MAGIC_DEF("cdivrem", 2, js_bigint_div, BF_RNDU | 0x10 ),
    JS_CFUNC_MAGIC_DEF("edivrem", 2, js_bigint_div, BF_DIVREM_EUCLIDIAN | 0x10 ),
    JS_CFUNC_MAGIC_DEF("sqrt", 1, js_bigint_sqrt, 0 ),
    JS_CFUNC_MAGIC_DEF("sqrtrem", 1, js_bigint_sqrt, 1 ),
    JS_CFUNC_MAGIC_DEF("floorLog2", 1, js_bigint_op1, 0 ),
    JS_CFUNC_MAGIC_DEF("ctz", 1, js_bigint_op1, 1 ),
};

static const JSCFunctionListEntry js_bigint_proto_funcs[] = {
    JS_CFUNC_DEF("toString", 0, js_bigint_toString ),
    JS_CFUNC_DEF("valueOf", 0, js_bigint_valueOf ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "BigInt", JS_PROP_CONFIGURABLE ),
};

void JS_AddIntrinsicBigInt(JSContext *ctx)
{
    JSRuntime *rt = ctx->rt;
    JSValueConst obj1;

    rt->bigint_ops.to_string = js_bigint_to_string;
    rt->bigint_ops.from_string = js_string_to_bigint;
    rt->bigint_ops.unary_arith = js_unary_arith_bigint;
    rt->bigint_ops.binary_arith = js_binary_arith_bigint;
    rt->bigint_ops.compare = js_compare_bigfloat;

    ctx->class_proto[JS_CLASS_BIG_INT] = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_BIG_INT],
                               js_bigint_proto_funcs,
                               countof(js_bigint_proto_funcs));
    obj1 = JS_NewGlobalCConstructor(ctx, "BigInt", js_bigint_constructor, 1,
                                    ctx->class_proto[JS_CLASS_BIG_INT]);
    JS_SetPropertyFunctionList(ctx, obj1, js_bigint_funcs,
                               countof(js_bigint_funcs));
}

/* BigFloat */

static JSValue js_thisBigFloatValue(JSContext *ctx, JSValueConst this_val)
{
    if (JS_IsBigFloat(this_val))
        return JS_DupValue(ctx, this_val);

    if (JS_VALUE_GET_TAG(this_val) == JS_TAG_OBJECT) {
        JSObject *p = JS_VALUE_GET_OBJ(this_val);
        if (p->class_id == JS_CLASS_BIG_FLOAT) {
            if (JS_IsBigFloat(p->u.object_data))
                return JS_DupValue(ctx, p->u.object_data);
        }
    }
    return JS_ThrowTypeError(ctx, "not a bigfloat");
}

static JSValue js_bigfloat_toString(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    JSValue val;
    int base;
    JSValue ret;

    val = js_thisBigFloatValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    if (argc == 0 || JS_IsUndefined(argv[0])) {
        base = 10;
    } else {
        base = js_get_radix(ctx, argv[0]);
        if (base < 0)
            goto fail;
    }
    ret = js_ftoa(ctx, val, base, 0, BF_RNDN | BF_FTOA_FORMAT_FREE_MIN);
    JS_FreeValue(ctx, val);
    return ret;
 fail:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static JSValue js_bigfloat_valueOf(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    return js_thisBigFloatValue(ctx, this_val);
}

static int bigfloat_get_rnd_mode(JSContext *ctx, JSValueConst val)
{
    int rnd_mode;
    if (JS_ToInt32Sat(ctx, &rnd_mode, val))
        return -1;
    if (rnd_mode < BF_RNDN || rnd_mode > BF_RNDF) {
        JS_ThrowRangeError(ctx, "invalid rounding mode");
        return -1;
    }
    return rnd_mode;
}

static JSValue js_bigfloat_toFixed(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    JSValue val, ret;
    int64_t f;
    int rnd_mode, radix;

    val = js_thisBigFloatValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    if (JS_ToInt64Sat(ctx, &f, argv[0]))
        goto fail;
    if (f < 0 || f > BF_PREC_MAX) {
        JS_ThrowRangeError(ctx, "invalid number of digits");
        goto fail;
    }
    rnd_mode = BF_RNDNA;
    radix = 10;
    /* XXX: swap parameter order for rounding mode and radix */
    if (argc > 1) {
        rnd_mode = bigfloat_get_rnd_mode(ctx, argv[1]);
        if (rnd_mode < 0)
            goto fail;
    }
    if (argc > 2) {
        radix = js_get_radix(ctx, argv[2]);
        if (radix < 0)
            goto fail;
    }
    ret = js_ftoa(ctx, val, radix, f, rnd_mode | BF_FTOA_FORMAT_FRAC);
    JS_FreeValue(ctx, val);
    return ret;
 fail:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static BOOL js_bigfloat_is_finite(JSContext *ctx, JSValueConst val)
{
    BOOL res;
    uint32_t tag;

    tag = JS_VALUE_GET_NORM_TAG(val);
    switch(tag) {
    case JS_TAG_BIG_FLOAT:
        {
            JSBigFloat *p = JS_VALUE_GET_PTR(val);
            res = bf_is_finite(&p->num);
        }
        break;
    default:
        res = FALSE;
        break;
    }
    return res;
}

static JSValue js_bigfloat_toExponential(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    JSValue val, ret;
    int64_t f;
    int rnd_mode, radix;

    val = js_thisBigFloatValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    if (JS_ToInt64Sat(ctx, &f, argv[0]))
        goto fail;
    if (!js_bigfloat_is_finite(ctx, val)) {
        ret = JS_ToString(ctx, val);
    } else if (JS_IsUndefined(argv[0])) {
        ret = js_ftoa(ctx, val, 10, 0,
                      BF_RNDN | BF_FTOA_FORMAT_FREE_MIN | BF_FTOA_FORCE_EXP);
    } else {
        if (f < 0 || f > BF_PREC_MAX) {
            JS_ThrowRangeError(ctx, "invalid number of digits");
            goto fail;
        }
        rnd_mode = BF_RNDNA;
        radix = 10;
        if (argc > 1) {
            rnd_mode = bigfloat_get_rnd_mode(ctx, argv[1]);
            if (rnd_mode < 0)
                goto fail;
        }
        if (argc > 2) {
            radix = js_get_radix(ctx, argv[2]);
            if (radix < 0)
                goto fail;
        }
        ret = js_ftoa(ctx, val, radix, f + 1,
                      rnd_mode | BF_FTOA_FORMAT_FIXED | BF_FTOA_FORCE_EXP);
    }
    JS_FreeValue(ctx, val);
    return ret;
 fail:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static JSValue js_bigfloat_toPrecision(JSContext *ctx, JSValueConst this_val,
                                     int argc, JSValueConst *argv)
{
    JSValue val, ret;
    int64_t p;
    int rnd_mode, radix;

    val = js_thisBigFloatValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    if (JS_IsUndefined(argv[0]))
        goto to_string;
    if (JS_ToInt64Sat(ctx, &p, argv[0]))
        goto fail;
    if (!js_bigfloat_is_finite(ctx, val)) {
    to_string:
        ret = JS_ToString(ctx, this_val);
    } else {
        if (p < 1 || p > BF_PREC_MAX) {
            JS_ThrowRangeError(ctx, "invalid number of digits");
            goto fail;
        }
        rnd_mode = BF_RNDNA;
        radix = 10;
        if (argc > 1) {
            rnd_mode = bigfloat_get_rnd_mode(ctx, argv[1]);
            if (rnd_mode < 0)
                goto fail;
        }
        if (argc > 2) {
            radix = js_get_radix(ctx, argv[2]);
            if (radix < 0)
                goto fail;
        }
        ret = js_ftoa(ctx, val, radix, p, rnd_mode | BF_FTOA_FORMAT_FIXED);
    }
    JS_FreeValue(ctx, val);
    return ret;
 fail:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static const JSCFunctionListEntry js_bigfloat_proto_funcs[] = {
    JS_CFUNC_DEF("toString", 0, js_bigfloat_toString ),
    JS_CFUNC_DEF("valueOf", 0, js_bigfloat_valueOf ),
    JS_CFUNC_DEF("toPrecision", 1, js_bigfloat_toPrecision ),
    JS_CFUNC_DEF("toFixed", 1, js_bigfloat_toFixed ),
    JS_CFUNC_DEF("toExponential", 1, js_bigfloat_toExponential ),
};

static JSValue js_bigfloat_constructor(JSContext *ctx,
                                       JSValueConst new_target,
                                       int argc, JSValueConst *argv)
{
    JSValue val;
    if (!JS_IsUndefined(new_target))
        return JS_ThrowTypeError(ctx, "not a constructor");
    if (argc == 0) {
        bf_t *r;
        val = JS_NewBigFloat(ctx);
        if (JS_IsException(val))
            return val;
        r = JS_GetBigFloat(val);
        bf_set_zero(r, 0);
    } else {
        val = JS_DupValue(ctx, argv[0]);
    redo:
        switch(JS_VALUE_GET_NORM_TAG(val)) {
        case JS_TAG_BIG_FLOAT:
            break;
        case JS_TAG_FLOAT64:
            {
                bf_t *r;
                double d = JS_VALUE_GET_FLOAT64(val);
                val = JS_NewBigFloat(ctx);
                if (JS_IsException(val))
                    break;
                r = JS_GetBigFloat(val);
                if (bf_set_float64(r, d))
                    goto fail;
            }
            break;
        case JS_TAG_INT:
            {
                bf_t *r;
                int32_t v = JS_VALUE_GET_INT(val);
                val = JS_NewBigFloat(ctx);
                if (JS_IsException(val))
                    break;
                r = JS_GetBigFloat(val);
                if (bf_set_si(r, v))
                    goto fail;
            }
            break;
        case JS_TAG_BIG_INT:
            /* We keep the full precision of the integer */
            {
                JSBigFloat *p = JS_VALUE_GET_PTR(val);
                val = JS_MKPTR(JS_TAG_BIG_FLOAT, p);
            }
            break;
        case JS_TAG_BIG_DECIMAL:
            val = JS_ToStringFree(ctx, val);
            if (JS_IsException(val))
                break;
            goto redo;
        case JS_TAG_STRING:
            {
                const char *str, *p;
                size_t len;
                int err;

                str = JS_ToCStringLen(ctx, &len, val);
                JS_FreeValue(ctx, val);
                if (!str)
                    return JS_EXCEPTION;
                p = str;
                p += skip_spaces(p);
                if ((p - str) == len) {
                    bf_t *r;
                    val = JS_NewBigFloat(ctx);
                    if (JS_IsException(val))
                        break;
                    r = JS_GetBigFloat(val);
                    bf_set_zero(r, 0);
                    err = 0;
                } else {
                    val = js_atof(ctx, p, &p, 0, ATOD_ACCEPT_BIN_OCT |
                                  ATOD_TYPE_BIG_FLOAT |
                                  ATOD_ACCEPT_PREFIX_AFTER_SIGN);
                    if (JS_IsException(val)) {
                        JS_FreeCString(ctx, str);
                        return JS_EXCEPTION;
                    }
                    p += skip_spaces(p);
                    err = ((p - str) != len);
                }
                JS_FreeCString(ctx, str);
                if (err) {
                    JS_FreeValue(ctx, val);
                    return JS_ThrowSyntaxError(ctx, "invalid bigfloat literal");
                }
            }
            break;
        case JS_TAG_OBJECT:
            val = JS_ToPrimitiveFree(ctx, val, HINT_NUMBER);
            if (JS_IsException(val))
                break;
            goto redo;
        case JS_TAG_NULL:
        case JS_TAG_UNDEFINED:
        default:
            JS_FreeValue(ctx, val);
            return JS_ThrowTypeError(ctx, "cannot convert to bigfloat");
        }
    }
    return val;
 fail:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static JSValue js_bigfloat_get_const(JSContext *ctx,
                                     JSValueConst this_val, int magic)
{
    bf_t *r;
    JSValue val;
    val = JS_NewBigFloat(ctx);
    if (JS_IsException(val))
        return val;
    r = JS_GetBigFloat(val);
    switch(magic) {
    case 0: /* PI */
        bf_const_pi(r, ctx->fp_env.prec, ctx->fp_env.flags);
        break;
    case 1: /* LN2 */
        bf_const_log2(r, ctx->fp_env.prec, ctx->fp_env.flags);
        break;
    case 2: /* MIN_VALUE */
    case 3: /* MAX_VALUE */
        {
            slimb_t e_range, e;
            e_range = (limb_t)1 << (bf_get_exp_bits(ctx->fp_env.flags) - 1);
            bf_set_ui(r, 1);
            if (magic == 2) {
                e = -e_range + 2;
                if (ctx->fp_env.flags & BF_FLAG_SUBNORMAL)
                    e -= ctx->fp_env.prec - 1;
                bf_mul_2exp(r, e, ctx->fp_env.prec, ctx->fp_env.flags);
            } else {
                bf_mul_2exp(r, ctx->fp_env.prec, ctx->fp_env.prec,
                            ctx->fp_env.flags);
                bf_add_si(r, r, -1, ctx->fp_env.prec, ctx->fp_env.flags);
                bf_mul_2exp(r, e_range - ctx->fp_env.prec, ctx->fp_env.prec,
                            ctx->fp_env.flags);
            }
        }
        break;
    case 4: /* EPSILON */
        bf_set_ui(r, 1);
        bf_mul_2exp(r, 1 - ctx->fp_env.prec,
                    ctx->fp_env.prec, ctx->fp_env.flags);
        break;
    default:
        abort();
    }
    return val;
}

static JSValue js_bigfloat_parseFloat(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv)
{
    bf_t *a;
    const char *str;
    JSValue ret;
    int radix;
    JSFloatEnv *fe;

    str = JS_ToCString(ctx, argv[0]);
    if (!str)
        return JS_EXCEPTION;
    if (JS_ToInt32(ctx, &radix, argv[1])) {
    fail:
        JS_FreeCString(ctx, str);
        return JS_EXCEPTION;
    }
    if (radix != 0 && (radix < 2 || radix > 36)) {
        JS_ThrowRangeError(ctx, "radix must be between 2 and 36");
        goto fail;
    }
    fe = &ctx->fp_env;
    if (argc > 2) {
        fe = JS_GetOpaque2(ctx, argv[2], JS_CLASS_FLOAT_ENV);
        if (!fe)
            goto fail;
    }
    ret = JS_NewBigFloat(ctx);
    if (JS_IsException(ret))
        goto done;
    a = JS_GetBigFloat(ret);
    /* XXX: use js_atof() */
    bf_atof(a, str, NULL, radix, fe->prec, fe->flags);
 done:
    JS_FreeCString(ctx, str);
    return ret;
}

static JSValue js_bigfloat_isFinite(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    JSValueConst val = argv[0];
    JSBigFloat *p;

    if (JS_VALUE_GET_NORM_TAG(val) != JS_TAG_BIG_FLOAT)
        return JS_FALSE;
    p = JS_VALUE_GET_PTR(val);
    return JS_NewBool(ctx, bf_is_finite(&p->num));
}

static JSValue js_bigfloat_isNaN(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    JSValueConst val = argv[0];
    JSBigFloat *p;

    if (JS_VALUE_GET_NORM_TAG(val) != JS_TAG_BIG_FLOAT)
        return JS_FALSE;
    p = JS_VALUE_GET_PTR(val);
    return JS_NewBool(ctx, bf_is_nan(&p->num));
}

enum {
    MATH_OP_ABS,
    MATH_OP_FLOOR,
    MATH_OP_CEIL,
    MATH_OP_ROUND,
    MATH_OP_TRUNC,
    MATH_OP_SQRT,
    MATH_OP_FPROUND,
    MATH_OP_ACOS,
    MATH_OP_ASIN,
    MATH_OP_ATAN,
    MATH_OP_ATAN2,
    MATH_OP_COS,
    MATH_OP_EXP,
    MATH_OP_LOG,
    MATH_OP_POW,
    MATH_OP_SIN,
    MATH_OP_TAN,
    MATH_OP_FMOD,
    MATH_OP_REM,
    MATH_OP_SIGN,

    MATH_OP_ADD,
    MATH_OP_SUB,
    MATH_OP_MUL,
    MATH_OP_DIV,
};

static JSValue js_bigfloat_fop(JSContext *ctx, JSValueConst this_val,
                           int argc, JSValueConst *argv, int magic)
{
    bf_t a_s, *a, *r;
    JSFloatEnv *fe;
    int rnd_mode;
    JSValue op1, res;

    op1 = JS_ToNumeric(ctx, argv[0]);
    if (JS_IsException(op1))
        return op1;
    a = JS_ToBigFloat(ctx, &a_s, op1);
    fe = &ctx->fp_env;
    if (argc > 1) {
        fe = JS_GetOpaque2(ctx, argv[1], JS_CLASS_FLOAT_ENV);
        if (!fe)
            goto fail;
    }
    res = JS_NewBigFloat(ctx);
    if (JS_IsException(res)) {
    fail:
        if (a == &a_s)
            bf_delete(a);
        JS_FreeValue(ctx, op1);
        return JS_EXCEPTION;
    }
    r = JS_GetBigFloat(res);
    switch (magic) {
    case MATH_OP_ABS:
        bf_set(r, a);
        r->sign = 0;
        break;
    case MATH_OP_FLOOR:
        rnd_mode = BF_RNDD;
        goto rint;
    case MATH_OP_CEIL:
        rnd_mode = BF_RNDU;
        goto rint;
    case MATH_OP_ROUND:
        rnd_mode = BF_RNDNA;
        goto rint;
    case MATH_OP_TRUNC:
        rnd_mode = BF_RNDZ;
    rint:
        bf_set(r, a);
        fe->status |= bf_rint(r, rnd_mode);
        break;
    case MATH_OP_SQRT:
        fe->status |= bf_sqrt(r, a, fe->prec, fe->flags);
        break;
    case MATH_OP_FPROUND:
        bf_set(r, a);
        fe->status |= bf_round(r, fe->prec, fe->flags);
        break;
    case MATH_OP_ACOS:
        fe->status |= bf_acos(r, a, fe->prec, fe->flags);
        break;
    case MATH_OP_ASIN:
        fe->status |= bf_asin(r, a, fe->prec, fe->flags);
        break;
    case MATH_OP_ATAN:
        fe->status |= bf_atan(r, a, fe->prec, fe->flags);
        break;
    case MATH_OP_COS:
        fe->status |= bf_cos(r, a, fe->prec, fe->flags);
        break;
    case MATH_OP_EXP:
        fe->status |= bf_exp(r, a, fe->prec, fe->flags);
        break;
    case MATH_OP_LOG:
        fe->status |= bf_log(r, a, fe->prec, fe->flags);
        break;
    case MATH_OP_SIN:
        fe->status |= bf_sin(r, a, fe->prec, fe->flags);
        break;
    case MATH_OP_TAN:
        fe->status |= bf_tan(r, a, fe->prec, fe->flags);
        break;
    case MATH_OP_SIGN:
        if (bf_is_nan(a) || bf_is_zero(a)) {
            bf_set(r, a);
        } else {
            bf_set_si(r, 1 - 2 * a->sign);
        }
        break;
    default:
        abort();
    }
    if (a == &a_s)
        bf_delete(a);
    JS_FreeValue(ctx, op1);
    return res;
}

static JSValue js_bigfloat_fop2(JSContext *ctx, JSValueConst this_val,
                            int argc, JSValueConst *argv, int magic)
{
    bf_t a_s, *a, b_s, *b, r_s, *r = &r_s;
    JSFloatEnv *fe;
    JSValue op1, op2, res;

    op1 = JS_ToNumeric(ctx, argv[0]);
    if (JS_IsException(op1))
        return op1;
    op2 = JS_ToNumeric(ctx, argv[1]);
    if (JS_IsException(op2)) {
        JS_FreeValue(ctx, op1);
        return op2;
    }
    a = JS_ToBigFloat(ctx, &a_s, op1);
    b = JS_ToBigFloat(ctx, &b_s, op2);
    fe = &ctx->fp_env;
    if (argc > 2) {
        fe = JS_GetOpaque2(ctx, argv[2], JS_CLASS_FLOAT_ENV);
        if (!fe)
            goto fail;
    }
    res = JS_NewBigFloat(ctx);
    if (JS_IsException(res)) {
    fail:
        if (a == &a_s)
            bf_delete(a);
        if (b == &b_s)
            bf_delete(b);
        JS_FreeValue(ctx, op1);
        JS_FreeValue(ctx, op2);
        return JS_EXCEPTION;
    }
    r = JS_GetBigFloat(res);
    switch (magic) {
    case MATH_OP_ATAN2:
        fe->status |= bf_atan2(r, a, b, fe->prec, fe->flags);
        break;
    case MATH_OP_POW:
        fe->status |= bf_pow(r, a, b, fe->prec, fe->flags | BF_POW_JS_QUIRKS);
        break;
    case MATH_OP_FMOD:
        fe->status |= bf_rem(r, a, b, fe->prec, fe->flags, BF_RNDZ);
        break;
    case MATH_OP_REM:
        fe->status |= bf_rem(r, a, b, fe->prec, fe->flags, BF_RNDN);
        break;
    case MATH_OP_ADD:
        fe->status |= bf_add(r, a, b, fe->prec, fe->flags);
        break;
    case MATH_OP_SUB:
        fe->status |= bf_sub(r, a, b, fe->prec, fe->flags);
        break;
    case MATH_OP_MUL:
        fe->status |= bf_mul(r, a, b, fe->prec, fe->flags);
        break;
    case MATH_OP_DIV:
        fe->status |= bf_div(r, a, b, fe->prec, fe->flags);
        break;
    default:
        abort();
    }
    if (a == &a_s)
        bf_delete(a);
    if (b == &b_s)
        bf_delete(b);
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    return res;
}

static const JSCFunctionListEntry js_bigfloat_funcs[] = {
    JS_CGETSET_MAGIC_DEF("PI", js_bigfloat_get_const, NULL, 0 ),
    JS_CGETSET_MAGIC_DEF("LN2", js_bigfloat_get_const, NULL, 1 ),
    JS_CGETSET_MAGIC_DEF("MIN_VALUE", js_bigfloat_get_const, NULL, 2 ),
    JS_CGETSET_MAGIC_DEF("MAX_VALUE", js_bigfloat_get_const, NULL, 3 ),
    JS_CGETSET_MAGIC_DEF("EPSILON", js_bigfloat_get_const, NULL, 4 ),
    JS_CFUNC_DEF("parseFloat", 1, js_bigfloat_parseFloat ),
    JS_CFUNC_DEF("isFinite", 1, js_bigfloat_isFinite ),
    JS_CFUNC_DEF("isNaN", 1, js_bigfloat_isNaN ),
    JS_CFUNC_MAGIC_DEF("abs", 1, js_bigfloat_fop, MATH_OP_ABS ),
    JS_CFUNC_MAGIC_DEF("fpRound", 1, js_bigfloat_fop, MATH_OP_FPROUND ),
    JS_CFUNC_MAGIC_DEF("floor", 1, js_bigfloat_fop, MATH_OP_FLOOR ),
    JS_CFUNC_MAGIC_DEF("ceil", 1, js_bigfloat_fop, MATH_OP_CEIL ),
    JS_CFUNC_MAGIC_DEF("round", 1, js_bigfloat_fop, MATH_OP_ROUND ),
    JS_CFUNC_MAGIC_DEF("trunc", 1, js_bigfloat_fop, MATH_OP_TRUNC ),
    JS_CFUNC_MAGIC_DEF("sqrt", 1, js_bigfloat_fop, MATH_OP_SQRT ),
    JS_CFUNC_MAGIC_DEF("acos", 1, js_bigfloat_fop, MATH_OP_ACOS ),
    JS_CFUNC_MAGIC_DEF("asin", 1, js_bigfloat_fop, MATH_OP_ASIN ),
    JS_CFUNC_MAGIC_DEF("atan", 1, js_bigfloat_fop, MATH_OP_ATAN ),
    JS_CFUNC_MAGIC_DEF("atan2", 2, js_bigfloat_fop2, MATH_OP_ATAN2 ),
    JS_CFUNC_MAGIC_DEF("cos", 1, js_bigfloat_fop, MATH_OP_COS ),
    JS_CFUNC_MAGIC_DEF("exp", 1, js_bigfloat_fop, MATH_OP_EXP ),
    JS_CFUNC_MAGIC_DEF("log", 1, js_bigfloat_fop, MATH_OP_LOG ),
    JS_CFUNC_MAGIC_DEF("pow", 2, js_bigfloat_fop2, MATH_OP_POW ),
    JS_CFUNC_MAGIC_DEF("sin", 1, js_bigfloat_fop, MATH_OP_SIN ),
    JS_CFUNC_MAGIC_DEF("tan", 1, js_bigfloat_fop, MATH_OP_TAN ),
    JS_CFUNC_MAGIC_DEF("sign", 1, js_bigfloat_fop, MATH_OP_SIGN ),
    JS_CFUNC_MAGIC_DEF("add", 2, js_bigfloat_fop2, MATH_OP_ADD ),
    JS_CFUNC_MAGIC_DEF("sub", 2, js_bigfloat_fop2, MATH_OP_SUB ),
    JS_CFUNC_MAGIC_DEF("mul", 2, js_bigfloat_fop2, MATH_OP_MUL ),
    JS_CFUNC_MAGIC_DEF("div", 2, js_bigfloat_fop2, MATH_OP_DIV ),
    JS_CFUNC_MAGIC_DEF("fmod", 2, js_bigfloat_fop2, MATH_OP_FMOD ),
    JS_CFUNC_MAGIC_DEF("remainder", 2, js_bigfloat_fop2, MATH_OP_REM ),
};

/* FloatEnv */

static JSValue js_float_env_constructor(JSContext *ctx,
                                        JSValueConst new_target,
                                        int argc, JSValueConst *argv)
{
    JSValue obj;
    JSFloatEnv *fe;
    int64_t prec;
    int flags, rndmode;

    prec = ctx->fp_env.prec;
    flags = ctx->fp_env.flags;
    if (!JS_IsUndefined(argv[0])) {
        if (JS_ToInt64Sat(ctx, &prec, argv[0]))
            return JS_EXCEPTION;
        if (prec < BF_PREC_MIN || prec > BF_PREC_MAX)
            return JS_ThrowRangeError(ctx, "invalid precision");
        flags = BF_RNDN; /* RNDN, max exponent size, no subnormal */
        if (argc > 1 && !JS_IsUndefined(argv[1])) {
            if (JS_ToInt32Sat(ctx, &rndmode, argv[1]))
                return JS_EXCEPTION;
            if (rndmode < BF_RNDN || rndmode > BF_RNDF)
                return JS_ThrowRangeError(ctx, "invalid rounding mode");
            flags = rndmode;
        }
    }

    obj = JS_NewObjectClass(ctx, JS_CLASS_FLOAT_ENV);
    if (JS_IsException(obj))
        return JS_EXCEPTION;
    fe = js_malloc(ctx, sizeof(*fe));
    if (!fe)
        return JS_EXCEPTION;
    fe->prec = prec;
    fe->flags = flags;
    fe->status = 0;
    JS_SetOpaque(obj, fe);
    return obj;
}

static void js_float_env_finalizer(JSRuntime *rt, JSValue val)
{
    JSFloatEnv *fe = JS_GetOpaque(val, JS_CLASS_FLOAT_ENV);
    js_free_rt(rt, fe);
}

static JSValue js_float_env_get_prec(JSContext *ctx, JSValueConst this_val)
{
    return JS_NewInt64(ctx, ctx->fp_env.prec);
}

static JSValue js_float_env_get_expBits(JSContext *ctx, JSValueConst this_val)
{
    return JS_NewInt32(ctx, bf_get_exp_bits(ctx->fp_env.flags));
}

static JSValue js_float_env_setPrec(JSContext *ctx,
                                    JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    JSValueConst func;
    int exp_bits, flags, saved_flags;
    JSValue ret;
    limb_t saved_prec;
    int64_t prec;

    func = argv[0];
    if (JS_ToInt64Sat(ctx, &prec, argv[1]))
        return JS_EXCEPTION;
    if (prec < BF_PREC_MIN || prec > BF_PREC_MAX)
        return JS_ThrowRangeError(ctx, "invalid precision");
    exp_bits = BF_EXP_BITS_MAX;

    if (argc > 2 && !JS_IsUndefined(argv[2])) {
        if (JS_ToInt32Sat(ctx, &exp_bits, argv[2]))
            return JS_EXCEPTION;
        if (exp_bits < BF_EXP_BITS_MIN || exp_bits > BF_EXP_BITS_MAX)
            return JS_ThrowRangeError(ctx, "invalid number of exponent bits");
    }

    flags = BF_RNDN | BF_FLAG_SUBNORMAL | bf_set_exp_bits(exp_bits);

    saved_prec = ctx->fp_env.prec;
    saved_flags = ctx->fp_env.flags;

    ctx->fp_env.prec = prec;
    ctx->fp_env.flags = flags;

    ret = JS_Call(ctx, func, JS_UNDEFINED, 0, NULL);
    /* always restore the floating point precision */
    ctx->fp_env.prec = saved_prec;
    ctx->fp_env.flags = saved_flags;
    return ret;
}

#define FE_PREC      (-1)
#define FE_EXP       (-2)
#define FE_RNDMODE   (-3)
#define FE_SUBNORMAL (-4)

static JSValue js_float_env_proto_get_status(JSContext *ctx, JSValueConst this_val, int magic)
{
    JSFloatEnv *fe;
    fe = JS_GetOpaque2(ctx, this_val, JS_CLASS_FLOAT_ENV);
    if (!fe)
        return JS_EXCEPTION;
    switch(magic) {
    case FE_PREC:
        return JS_NewInt64(ctx, fe->prec);
    case FE_EXP:
        return JS_NewInt32(ctx, bf_get_exp_bits(fe->flags));
    case FE_RNDMODE:
        return JS_NewInt32(ctx, fe->flags & BF_RND_MASK);
    case FE_SUBNORMAL:
        return JS_NewBool(ctx, (fe->flags & BF_FLAG_SUBNORMAL) != 0);
    default:
        return JS_NewBool(ctx, (fe->status & magic) != 0);
    }
}

static JSValue js_float_env_proto_set_status(JSContext *ctx, JSValueConst this_val, JSValueConst val, int magic)
{
    JSFloatEnv *fe;
    int b;
    int64_t prec;

    fe = JS_GetOpaque2(ctx, this_val, JS_CLASS_FLOAT_ENV);
    if (!fe)
        return JS_EXCEPTION;
    switch(magic) {
    case FE_PREC:
        if (JS_ToInt64Sat(ctx, &prec, val))
            return JS_EXCEPTION;
        if (prec < BF_PREC_MIN || prec > BF_PREC_MAX)
            return JS_ThrowRangeError(ctx, "invalid precision");
        fe->prec = prec;
        break;
    case FE_EXP:
        if (JS_ToInt32Sat(ctx, &b, val))
            return JS_EXCEPTION;
        if (b < BF_EXP_BITS_MIN || b > BF_EXP_BITS_MAX)
            return JS_ThrowRangeError(ctx, "invalid number of exponent bits");
        fe->flags = (fe->flags & ~(BF_EXP_BITS_MASK << BF_EXP_BITS_SHIFT)) |
            bf_set_exp_bits(b);
        break;
    case FE_RNDMODE:
        b = bigfloat_get_rnd_mode(ctx, val);
        if (b < 0)
            return JS_EXCEPTION;
        fe->flags = (fe->flags & ~BF_RND_MASK) | b;
        break;
    case FE_SUBNORMAL:
        b = JS_ToBool(ctx, val);
        fe->flags = (fe->flags & ~BF_FLAG_SUBNORMAL) | (b ? BF_FLAG_SUBNORMAL: 0);
        break;
    default:
        b = JS_ToBool(ctx, val);
        fe->status = (fe->status & ~magic) & ((-b) & magic);
        break;
    }
    return JS_UNDEFINED;
}

static JSValue js_float_env_clearStatus(JSContext *ctx,
                                        JSValueConst this_val,
                                        int argc, JSValueConst *argv)
{
    JSFloatEnv *fe = JS_GetOpaque2(ctx, this_val, JS_CLASS_FLOAT_ENV);
    if (!fe)
        return JS_EXCEPTION;
    fe->status = 0;
    return JS_UNDEFINED;
}

static const JSCFunctionListEntry js_float_env_funcs[] = {
    JS_CGETSET_DEF("prec", js_float_env_get_prec, NULL ),
    JS_CGETSET_DEF("expBits", js_float_env_get_expBits, NULL ),
    JS_CFUNC_DEF("setPrec", 2, js_float_env_setPrec ),
    JS_PROP_INT32_DEF("RNDN", BF_RNDN, 0 ),
    JS_PROP_INT32_DEF("RNDZ", BF_RNDZ, 0 ),
    JS_PROP_INT32_DEF("RNDU", BF_RNDU, 0 ),
    JS_PROP_INT32_DEF("RNDD", BF_RNDD, 0 ),
    JS_PROP_INT32_DEF("RNDNA", BF_RNDNA, 0 ),
    JS_PROP_INT32_DEF("RNDA", BF_RNDA, 0 ),
    JS_PROP_INT32_DEF("RNDF", BF_RNDF, 0 ),
    JS_PROP_INT32_DEF("precMin", BF_PREC_MIN, 0 ),
    JS_PROP_INT64_DEF("precMax", BF_PREC_MAX, 0 ),
    JS_PROP_INT32_DEF("expBitsMin", BF_EXP_BITS_MIN, 0 ),
    JS_PROP_INT32_DEF("expBitsMax", BF_EXP_BITS_MAX, 0 ),
};

static const JSCFunctionListEntry js_float_env_proto_funcs[] = {
    JS_CGETSET_MAGIC_DEF("prec", js_float_env_proto_get_status,
                         js_float_env_proto_set_status, FE_PREC ),
    JS_CGETSET_MAGIC_DEF("expBits", js_float_env_proto_get_status,
                         js_float_env_proto_set_status, FE_EXP ),
    JS_CGETSET_MAGIC_DEF("rndMode", js_float_env_proto_get_status,
                         js_float_env_proto_set_status, FE_RNDMODE ),
    JS_CGETSET_MAGIC_DEF("subnormal", js_float_env_proto_get_status,
                         js_float_env_proto_set_status, FE_SUBNORMAL ),
    JS_CGETSET_MAGIC_DEF("invalidOperation", js_float_env_proto_get_status,
                         js_float_env_proto_set_status, BF_ST_INVALID_OP ),
    JS_CGETSET_MAGIC_DEF("divideByZero", js_float_env_proto_get_status,
                         js_float_env_proto_set_status, BF_ST_DIVIDE_ZERO ),
    JS_CGETSET_MAGIC_DEF("overflow", js_float_env_proto_get_status,
                         js_float_env_proto_set_status, BF_ST_OVERFLOW ),
    JS_CGETSET_MAGIC_DEF("underflow", js_float_env_proto_get_status,
                         js_float_env_proto_set_status, BF_ST_UNDERFLOW ),
    JS_CGETSET_MAGIC_DEF("inexact", js_float_env_proto_get_status,
                         js_float_env_proto_set_status, BF_ST_INEXACT ),
    JS_CFUNC_DEF("clearStatus", 0, js_float_env_clearStatus ),
};

void JS_AddIntrinsicBigFloat(JSContext *ctx)
{
    JSRuntime *rt = ctx->rt;
    JSValueConst obj1;

    rt->bigfloat_ops.to_string = js_bigfloat_to_string;
    rt->bigfloat_ops.from_string = js_string_to_bigfloat;
    rt->bigfloat_ops.unary_arith = js_unary_arith_bigfloat;
    rt->bigfloat_ops.binary_arith = js_binary_arith_bigfloat;
    rt->bigfloat_ops.compare = js_compare_bigfloat;
    rt->bigfloat_ops.mul_pow10_to_float64 = js_mul_pow10_to_float64;
    rt->bigfloat_ops.mul_pow10 = js_mul_pow10;

    ctx->class_proto[JS_CLASS_BIG_FLOAT] = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_BIG_FLOAT],
                               js_bigfloat_proto_funcs,
                               countof(js_bigfloat_proto_funcs));
    obj1 = JS_NewGlobalCConstructor(ctx, "BigFloat", js_bigfloat_constructor, 1,
                                    ctx->class_proto[JS_CLASS_BIG_FLOAT]);
    JS_SetPropertyFunctionList(ctx, obj1, js_bigfloat_funcs,
                               countof(js_bigfloat_funcs));

    ctx->class_proto[JS_CLASS_FLOAT_ENV] = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_FLOAT_ENV],
                               js_float_env_proto_funcs,
                               countof(js_float_env_proto_funcs));
    obj1 = JS_NewGlobalCConstructorOnly(ctx, "BigFloatEnv",
                                        js_float_env_constructor, 1,
                                        ctx->class_proto[JS_CLASS_FLOAT_ENV]);
    JS_SetPropertyFunctionList(ctx, obj1, js_float_env_funcs,
                               countof(js_float_env_funcs));
}

/* BigDecimal */

static JSValue JS_ToBigDecimalFree(JSContext *ctx, JSValue val,
                                   BOOL allow_null_or_undefined)
{
 redo:
    switch(JS_VALUE_GET_NORM_TAG(val)) {
    case JS_TAG_BIG_DECIMAL:
        break;
    case JS_TAG_NULL:
        if (!allow_null_or_undefined)
            goto fail;
        /* fall thru */
    case JS_TAG_BOOL:
    case JS_TAG_INT:
        {
            bfdec_t *r;
            int32_t v = JS_VALUE_GET_INT(val);

            val = JS_NewBigDecimal(ctx);
            if (JS_IsException(val))
                break;
            r = JS_GetBigDecimal(val);
            if (bfdec_set_si(r, v)) {
                JS_FreeValue(ctx, val);
                val = JS_EXCEPTION;
                break;
            }
        }
        break;
    case JS_TAG_FLOAT64:
    case JS_TAG_BIG_INT:
    case JS_TAG_BIG_FLOAT:
        val = JS_ToStringFree(ctx, val);
        if (JS_IsException(val))
            break;
        goto redo;
    case JS_TAG_STRING:
        {
            const char *str, *p;
            size_t len;
            int err;

            str = JS_ToCStringLen(ctx, &len, val);
            JS_FreeValue(ctx, val);
            if (!str)
                return JS_EXCEPTION;
            p = str;
            p += skip_spaces(p);
            if ((p - str) == len) {
                bfdec_t *r;
                val = JS_NewBigDecimal(ctx);
                if (JS_IsException(val))
                    break;
                r = JS_GetBigDecimal(val);
                bfdec_set_zero(r, 0);
                err = 0;
            } else {
                val = js_atof(ctx, p, &p, 0, ATOD_TYPE_BIG_DECIMAL);
                if (JS_IsException(val)) {
                    JS_FreeCString(ctx, str);
                    return JS_EXCEPTION;
                }
                p += skip_spaces(p);
                err = ((p - str) != len);
            }
            JS_FreeCString(ctx, str);
            if (err) {
                JS_FreeValue(ctx, val);
                return JS_ThrowSyntaxError(ctx, "invalid bigdecimal literal");
            }
        }
        break;
    case JS_TAG_OBJECT:
        val = JS_ToPrimitiveFree(ctx, val, HINT_NUMBER);
        if (JS_IsException(val))
            break;
        goto redo;
    case JS_TAG_UNDEFINED:
        {
            bfdec_t *r;
            if (!allow_null_or_undefined)
                goto fail;
            val = JS_NewBigDecimal(ctx);
            if (JS_IsException(val))
                break;
            r = JS_GetBigDecimal(val);
            bfdec_set_nan(r);
        }
        break;
    default:
    fail:
        JS_FreeValue(ctx, val);
        return JS_ThrowTypeError(ctx, "cannot convert to bigdecimal");
    }
    return val;
}

static JSValue js_bigdecimal_constructor(JSContext *ctx,
                                         JSValueConst new_target,
                                         int argc, JSValueConst *argv)
{
    JSValue val;
    if (!JS_IsUndefined(new_target))
        return JS_ThrowTypeError(ctx, "not a constructor");
    if (argc == 0) {
        bfdec_t *r;
        val = JS_NewBigDecimal(ctx);
        if (JS_IsException(val))
            return val;
        r = JS_GetBigDecimal(val);
        bfdec_set_zero(r, 0);
    } else {
        val = JS_ToBigDecimalFree(ctx, JS_DupValue(ctx, argv[0]), FALSE);
    }
    return val;
}

static JSValue js_thisBigDecimalValue(JSContext *ctx, JSValueConst this_val)
{
    if (JS_IsBigDecimal(this_val))
        return JS_DupValue(ctx, this_val);

    if (JS_VALUE_GET_TAG(this_val) == JS_TAG_OBJECT) {
        JSObject *p = JS_VALUE_GET_OBJ(this_val);
        if (p->class_id == JS_CLASS_BIG_DECIMAL) {
            if (JS_IsBigDecimal(p->u.object_data))
                return JS_DupValue(ctx, p->u.object_data);
        }
    }
    return JS_ThrowTypeError(ctx, "not a bigdecimal");
}

static JSValue js_bigdecimal_toString(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv)
{
    JSValue val;

    val = js_thisBigDecimalValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    return JS_ToStringFree(ctx, val);
}

static JSValue js_bigdecimal_valueOf(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    return js_thisBigDecimalValue(ctx, this_val);
}

static int js_bigdecimal_get_rnd_mode(JSContext *ctx, JSValueConst obj)
{
    const char *str;
    size_t size;
    int rnd_mode;

    str = JS_ToCStringLen(ctx, &size, obj);
    if (!str)
        return -1;
    if (strlen(str) != size)
        goto invalid_rounding_mode;
    if (!strcmp(str, "floor")) {
        rnd_mode = BF_RNDD;
    } else if (!strcmp(str, "ceiling")) {
        rnd_mode = BF_RNDU;
    } else if (!strcmp(str, "down")) {
        rnd_mode = BF_RNDZ;
    } else if (!strcmp(str, "up")) {
        rnd_mode = BF_RNDA;
    } else if (!strcmp(str, "half-even")) {
        rnd_mode = BF_RNDN;
    } else if (!strcmp(str, "half-up")) {
        rnd_mode = BF_RNDNA;
    } else {
    invalid_rounding_mode:
        JS_FreeCString(ctx, str);
        JS_ThrowTypeError(ctx, "invalid rounding mode");
        return -1;
    }
    JS_FreeCString(ctx, str);
    return rnd_mode;
}

typedef struct {
    int64_t prec;
    bf_flags_t flags;
} BigDecimalEnv;

static int js_bigdecimal_get_env(JSContext *ctx, BigDecimalEnv *fe,
                                 JSValueConst obj)
{
    JSValue prop;
    int64_t val;
    BOOL has_prec;
    int rnd_mode;

    if (!JS_IsObject(obj)) {
        JS_ThrowTypeErrorNotAnObject(ctx);
        return -1;
    }
    prop = JS_GetProperty(ctx, obj, JS_ATOM_roundingMode);
    if (JS_IsException(prop))
        return -1;
    rnd_mode = js_bigdecimal_get_rnd_mode(ctx, prop);
    JS_FreeValue(ctx, prop);
    if (rnd_mode < 0)
        return -1;
    fe->flags = rnd_mode;

    prop = JS_GetProperty(ctx, obj, JS_ATOM_maximumSignificantDigits);
    if (JS_IsException(prop))
        return -1;
    has_prec = FALSE;
    if (!JS_IsUndefined(prop)) {
        if (JS_ToInt64SatFree(ctx, &val, prop))
            return -1;
        if (val < 1 || val > BF_PREC_MAX)
            goto invalid_precision;
        fe->prec = val;
        has_prec = TRUE;
    }

    prop = JS_GetProperty(ctx, obj, JS_ATOM_maximumFractionDigits);
    if (JS_IsException(prop))
        return -1;
    if (!JS_IsUndefined(prop)) {
        if (has_prec) {
            JS_FreeValue(ctx, prop);
            JS_ThrowTypeError(ctx, "cannot provide both maximumSignificantDigits and maximumFractionDigits");
            return -1;
        }
        if (JS_ToInt64SatFree(ctx, &val, prop))
            return -1;
        if (val < 0 || val > BF_PREC_MAX) {
        invalid_precision:
            JS_ThrowTypeError(ctx, "invalid precision");
            return -1;
        }
        fe->prec = val;
        fe->flags |= BF_FLAG_RADPNT_PREC;
        has_prec = TRUE;
    }
    if (!has_prec) {
        JS_ThrowTypeError(ctx, "precision must be present");
        return -1;
    }
    return 0;
}


static JSValue js_bigdecimal_fop(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv, int magic)
{
    bfdec_t *a, *b, r_s, *r = &r_s;
    JSValue op1, op2, res;
    BigDecimalEnv fe_s, *fe = &fe_s;
    int op_count, ret;

    if (magic == MATH_OP_SQRT ||
        magic == MATH_OP_ROUND)
        op_count = 1;
    else
        op_count = 2;

    op1 = JS_ToNumeric(ctx, argv[0]);
    if (JS_IsException(op1))
        return op1;
    a = JS_ToBigDecimal(ctx, op1);
    if (!a) {
        JS_FreeValue(ctx, op1);
        return JS_EXCEPTION;
    }
    if (op_count >= 2) {
        op2 = JS_ToNumeric(ctx, argv[1]);
        if (JS_IsException(op2)) {
            JS_FreeValue(ctx, op1);
            return op2;
        }
        b = JS_ToBigDecimal(ctx, op2);
        if (!b)
            goto fail;
    } else {
        op2 = JS_UNDEFINED;
        b = NULL;
    }
    fe->flags = BF_RNDZ;
    fe->prec = BF_PREC_INF;
    if (op_count < argc) {
        if (js_bigdecimal_get_env(ctx, fe, argv[op_count]))
            goto fail;
    }

    res = JS_NewBigDecimal(ctx);
    if (JS_IsException(res)) {
    fail:
        JS_FreeValue(ctx, op1);
        JS_FreeValue(ctx, op2);
        return JS_EXCEPTION;
    }
    r = JS_GetBigDecimal(res);
    switch (magic) {
    case MATH_OP_ADD:
        ret = bfdec_add(r, a, b, fe->prec, fe->flags);
        break;
    case MATH_OP_SUB:
        ret = bfdec_sub(r, a, b, fe->prec, fe->flags);
        break;
    case MATH_OP_MUL:
        ret = bfdec_mul(r, a, b, fe->prec, fe->flags);
        break;
    case MATH_OP_DIV:
        ret = bfdec_div(r, a, b, fe->prec, fe->flags);
        break;
    case MATH_OP_FMOD:
        ret = bfdec_rem(r, a, b, fe->prec, fe->flags, BF_RNDZ);
        break;
    case MATH_OP_SQRT:
        ret = bfdec_sqrt(r, a, fe->prec, fe->flags);
        break;
    case MATH_OP_ROUND:
        ret = bfdec_set(r, a);
        if (!(ret & BF_ST_MEM_ERROR))
            ret = bfdec_round(r, fe->prec, fe->flags);
        break;
    default:
        abort();
    }
    JS_FreeValue(ctx, op1);
    JS_FreeValue(ctx, op2);
    ret &= BF_ST_MEM_ERROR | BF_ST_DIVIDE_ZERO | BF_ST_INVALID_OP |
        BF_ST_OVERFLOW;
    if (ret != 0) {
        JS_FreeValue(ctx, res);
        return throw_bf_exception(ctx, ret);
    } else {
        return res;
    }
}

static JSValue js_bigdecimal_toFixed(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    JSValue val, ret;
    int64_t f;
    int rnd_mode;

    val = js_thisBigDecimalValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    if (JS_ToInt64Sat(ctx, &f, argv[0]))
        goto fail;
    if (f < 0 || f > BF_PREC_MAX) {
        JS_ThrowRangeError(ctx, "invalid number of digits");
        goto fail;
    }
    rnd_mode = BF_RNDNA;
    if (argc > 1) {
        rnd_mode = js_bigdecimal_get_rnd_mode(ctx, argv[1]);
        if (rnd_mode < 0)
            goto fail;
    }
    ret = js_bigdecimal_to_string1(ctx, val, f, rnd_mode | BF_FTOA_FORMAT_FRAC);
    JS_FreeValue(ctx, val);
    return ret;
 fail:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static JSValue js_bigdecimal_toExponential(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    JSValue val, ret;
    int64_t f;
    int rnd_mode;

    val = js_thisBigDecimalValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    if (JS_ToInt64Sat(ctx, &f, argv[0]))
        goto fail;
    if (JS_IsUndefined(argv[0])) {
        ret = js_bigdecimal_to_string1(ctx, val, 0,
                  BF_RNDN | BF_FTOA_FORMAT_FREE_MIN | BF_FTOA_FORCE_EXP);
    } else {
        if (f < 0 || f > BF_PREC_MAX) {
            JS_ThrowRangeError(ctx, "invalid number of digits");
            goto fail;
        }
        rnd_mode = BF_RNDNA;
        if (argc > 1) {
            rnd_mode = js_bigdecimal_get_rnd_mode(ctx, argv[1]);
            if (rnd_mode < 0)
                goto fail;
        }
        ret = js_bigdecimal_to_string1(ctx, val, f + 1,
                      rnd_mode | BF_FTOA_FORMAT_FIXED | BF_FTOA_FORCE_EXP);
    }
    JS_FreeValue(ctx, val);
    return ret;
 fail:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static JSValue js_bigdecimal_toPrecision(JSContext *ctx, JSValueConst this_val,
                                     int argc, JSValueConst *argv)
{
    JSValue val, ret;
    int64_t p;
    int rnd_mode;

    val = js_thisBigDecimalValue(ctx, this_val);
    if (JS_IsException(val))
        return val;
    if (JS_IsUndefined(argv[0])) {
        return JS_ToStringFree(ctx, val);
    }
    if (JS_ToInt64Sat(ctx, &p, argv[0]))
        goto fail;
    if (p < 1 || p > BF_PREC_MAX) {
        JS_ThrowRangeError(ctx, "invalid number of digits");
        goto fail;
    }
    rnd_mode = BF_RNDNA;
    if (argc > 1) {
        rnd_mode = js_bigdecimal_get_rnd_mode(ctx, argv[1]);
        if (rnd_mode < 0)
            goto fail;
    }
    ret = js_bigdecimal_to_string1(ctx, val, p,
                                   rnd_mode | BF_FTOA_FORMAT_FIXED);
    JS_FreeValue(ctx, val);
    return ret;
 fail:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

static const JSCFunctionListEntry js_bigdecimal_proto_funcs[] = {
    JS_CFUNC_DEF("toString", 0, js_bigdecimal_toString ),
    JS_CFUNC_DEF("valueOf", 0, js_bigdecimal_valueOf ),
    JS_CFUNC_DEF("toPrecision", 1, js_bigdecimal_toPrecision ),
    JS_CFUNC_DEF("toFixed", 1, js_bigdecimal_toFixed ),
    JS_CFUNC_DEF("toExponential", 1, js_bigdecimal_toExponential ),
};

static const JSCFunctionListEntry js_bigdecimal_funcs[] = {
    JS_CFUNC_MAGIC_DEF("add", 2, js_bigdecimal_fop, MATH_OP_ADD ),
    JS_CFUNC_MAGIC_DEF("sub", 2, js_bigdecimal_fop, MATH_OP_SUB ),
    JS_CFUNC_MAGIC_DEF("mul", 2, js_bigdecimal_fop, MATH_OP_MUL ),
    JS_CFUNC_MAGIC_DEF("div", 2, js_bigdecimal_fop, MATH_OP_DIV ),
    JS_CFUNC_MAGIC_DEF("mod", 2, js_bigdecimal_fop, MATH_OP_FMOD ),
    JS_CFUNC_MAGIC_DEF("round", 1, js_bigdecimal_fop, MATH_OP_ROUND ),
    JS_CFUNC_MAGIC_DEF("sqrt", 1, js_bigdecimal_fop, MATH_OP_SQRT ),
};

void JS_AddIntrinsicBigDecimal(JSContext *ctx)
{
    JSRuntime *rt = ctx->rt;
    JSValueConst obj1;

    rt->bigdecimal_ops.to_string = js_bigdecimal_to_string;
    rt->bigdecimal_ops.from_string = js_string_to_bigdecimal;
    rt->bigdecimal_ops.unary_arith = js_unary_arith_bigdecimal;
    rt->bigdecimal_ops.binary_arith = js_binary_arith_bigdecimal;
    rt->bigdecimal_ops.compare = js_compare_bigdecimal;

    ctx->class_proto[JS_CLASS_BIG_DECIMAL] = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_BIG_DECIMAL],
                               js_bigdecimal_proto_funcs,
                               countof(js_bigdecimal_proto_funcs));
    obj1 = JS_NewGlobalCConstructor(ctx, "BigDecimal",
                                    js_bigdecimal_constructor, 1,
                                    ctx->class_proto[JS_CLASS_BIG_DECIMAL]);
    JS_SetPropertyFunctionList(ctx, obj1, js_bigdecimal_funcs,
                               countof(js_bigdecimal_funcs));
}

void JS_EnableBignumExt(JSContext *ctx, BOOL enable)
{
    ctx->bignum_ext = enable;
}

#endif /* CONFIG_BIGNUM */

static const char * const native_error_name[JS_NATIVE_ERROR_COUNT] = {
    "EvalError", "RangeError", "ReferenceError",
    "SyntaxError", "TypeError", "URIError",
    "InternalError", "AggregateError",
};

/* Minimum amount of objects to be able to compile code and display
   error messages. No JSAtom should be allocated by this function. */
static void JS_AddIntrinsicBasicObjects(JSContext *ctx)
{
    JSValue proto;
    int i;

    ctx->class_proto[JS_CLASS_OBJECT] = JS_NewObjectProto(ctx, JS_NULL);
    ctx->function_proto = JS_NewCFunction3(ctx, js_function_proto, "", 0,
                                           JS_CFUNC_generic, 0,
                                           ctx->class_proto[JS_CLASS_OBJECT]);
    ctx->class_proto[JS_CLASS_BYTECODE_FUNCTION] = JS_DupValue(ctx, ctx->function_proto);
    ctx->class_proto[JS_CLASS_ERROR] = JS_NewObject(ctx);
#if 0
    /* these are auto-initialized from js_error_proto_funcs,
       but delaying might be a problem */
    JS_DefinePropertyValue(ctx, ctx->class_proto[JS_CLASS_ERROR], JS_ATOM_name,
                           JS_AtomToString(ctx, JS_ATOM_Error),
                           JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
    JS_DefinePropertyValue(ctx, ctx->class_proto[JS_CLASS_ERROR], JS_ATOM_message,
                           JS_AtomToString(ctx, JS_ATOM_empty_string),
                           JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
#endif
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_ERROR],
                               js_error_proto_funcs,
                               countof(js_error_proto_funcs));

    for(i = 0; i < JS_NATIVE_ERROR_COUNT; i++) {
        proto = JS_NewObjectProto(ctx, ctx->class_proto[JS_CLASS_ERROR]);
        JS_DefinePropertyValue(ctx, proto, JS_ATOM_name,
                               JS_NewAtomString(ctx, native_error_name[i]),
                               JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
        JS_DefinePropertyValue(ctx, proto, JS_ATOM_message,
                               JS_AtomToString(ctx, JS_ATOM_empty_string),
                               JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
        ctx->native_error_proto[i] = proto;
    }

    /* the array prototype is an array */
    ctx->class_proto[JS_CLASS_ARRAY] =
        JS_NewObjectProtoClass(ctx, ctx->class_proto[JS_CLASS_OBJECT],
                               JS_CLASS_ARRAY);

    ctx->array_shape = js_new_shape2(ctx, get_proto_obj(ctx->class_proto[JS_CLASS_ARRAY]),
                                     JS_PROP_INITIAL_HASH_SIZE, 1);
    add_shape_property(ctx, &ctx->array_shape, NULL,
                       JS_ATOM_length, JS_PROP_WRITABLE | JS_PROP_LENGTH);

    /* XXX: could test it on first context creation to ensure that no
       new atoms are created in JS_AddIntrinsicBasicObjects(). It is
       necessary to avoid useless renumbering of atoms after
       JS_EvalBinary() if it is done just after
       JS_AddIntrinsicBasicObjects(). */
    //    assert(ctx->rt->atom_count == JS_ATOM_END);
}

inline void JS_AddIntrinsicBaseObjects(JSContext *ctx)
{
    int i;
    JSValueConst obj, number_obj;
    JSValue obj1;

    ctx->throw_type_error = JS_NewCFunction(ctx, js_throw_type_error, NULL, 0);

    /* add caller and arguments properties to throw a TypeError */
    obj1 = JS_NewCFunction(ctx, js_function_proto_caller, NULL, 0);
    JS_DefineProperty(ctx, ctx->function_proto, JS_ATOM_caller, JS_UNDEFINED,
                      obj1, ctx->throw_type_error,
                      JS_PROP_HAS_GET | JS_PROP_HAS_SET |
                      JS_PROP_HAS_CONFIGURABLE | JS_PROP_CONFIGURABLE);
    JS_DefineProperty(ctx, ctx->function_proto, JS_ATOM_arguments, JS_UNDEFINED,
                      obj1, ctx->throw_type_error,
                      JS_PROP_HAS_GET | JS_PROP_HAS_SET |
                      JS_PROP_HAS_CONFIGURABLE | JS_PROP_CONFIGURABLE);
    JS_FreeValue(ctx, obj1);
    JS_FreeValue(ctx, js_object_seal(ctx, JS_UNDEFINED, 1, (JSValueConst *)&ctx->throw_type_error, 1));

    ctx->global_obj = JS_NewObject(ctx);
    ctx->global_var_obj = JS_NewObjectProto(ctx, JS_NULL);

    /* Object */
    obj = JS_NewGlobalCConstructor(ctx, "Object", js_object_constructor, 1,
                                   ctx->class_proto[JS_CLASS_OBJECT]);
    JS_SetPropertyFunctionList(ctx, obj, js_object_funcs, countof(js_object_funcs));
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_OBJECT],
                               js_object_proto_funcs, countof(js_object_proto_funcs));

    /* Function */
    JS_SetPropertyFunctionList(ctx, ctx->function_proto, js_function_proto_funcs, countof(js_function_proto_funcs));
    ctx->function_ctor = JS_NewCFunctionMagic(ctx, js_function_constructor,
                                              "Function", 1, JS_CFUNC_constructor_or_func_magic,
                                              JS_FUNC_NORMAL);
    JS_NewGlobalCConstructor2(ctx, JS_DupValue(ctx, ctx->function_ctor), "Function",
                              ctx->function_proto);

    /* Error */
    obj1 = JS_NewCFunctionMagic(ctx, js_error_constructor,
                                "Error", 1, JS_CFUNC_constructor_or_func_magic, -1);
    JS_NewGlobalCConstructor2(ctx, obj1,
                              "Error", ctx->class_proto[JS_CLASS_ERROR]);

    for(i = 0; i < JS_NATIVE_ERROR_COUNT; i++) {
        JSValue func_obj;
        int n_args;
        n_args = 1 + (i == JS_AGGREGATE_ERROR);
        func_obj = JS_NewCFunction3(ctx, (JSCFunction *)js_error_constructor,
                                    native_error_name[i], n_args,
                                    JS_CFUNC_constructor_or_func_magic, i, obj1);
        JS_NewGlobalCConstructor2(ctx, func_obj, native_error_name[i],
                                  ctx->native_error_proto[i]);
    }

    /* Iterator prototype */
    ctx->iterator_proto = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->iterator_proto,
                               js_iterator_proto_funcs,
                               countof(js_iterator_proto_funcs));

    /* Array */
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_ARRAY],
                               js_array_proto_funcs,
                               countof(js_array_proto_funcs));

    obj = JS_NewGlobalCConstructor(ctx, "Array", js_array_constructor, 1,
                                   ctx->class_proto[JS_CLASS_ARRAY]);
    ctx->array_ctor = JS_DupValue(ctx, obj);
    JS_SetPropertyFunctionList(ctx, obj, js_array_funcs,
                               countof(js_array_funcs));

    /* XXX: create auto_initializer */
    {
        /* initialize Array.prototype[Symbol.unscopables] */
        char const unscopables[] = "copyWithin" "\0" "entries" "\0" "fill" "\0" "find" "\0"
            "findIndex" "\0" "flat" "\0" "flatMap" "\0" "includes" "\0" "keys" "\0" "values" "\0";
        const char *p = unscopables;
        obj1 = JS_NewObjectProto(ctx, JS_NULL);
        for(p = unscopables; *p; p += strlen(p) + 1) {
            JS_DefinePropertyValueStr(ctx, obj1, p, JS_TRUE, JS_PROP_C_W_E);
        }
        JS_DefinePropertyValue(ctx, ctx->class_proto[JS_CLASS_ARRAY],
                               JS_ATOM_Symbol_unscopables, obj1,
                               JS_PROP_CONFIGURABLE);
    }

    /* needed to initialize arguments[Symbol.iterator] */
    ctx->array_proto_values =
        JS_GetProperty(ctx, ctx->class_proto[JS_CLASS_ARRAY], JS_ATOM_values);

    ctx->class_proto[JS_CLASS_ARRAY_ITERATOR] = JS_NewObjectProto(ctx, ctx->iterator_proto);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_ARRAY_ITERATOR],
                               js_array_iterator_proto_funcs,
                               countof(js_array_iterator_proto_funcs));

    /* parseFloat and parseInteger must be defined before Number
       because of the Number.parseFloat and Number.parseInteger
       aliases */
    JS_SetPropertyFunctionList(ctx, ctx->global_obj, js_global_funcs,
                               countof(js_global_funcs));

    /* Number */
    ctx->class_proto[JS_CLASS_NUMBER] = JS_NewObjectProtoClass(ctx, ctx->class_proto[JS_CLASS_OBJECT],
                                                               JS_CLASS_NUMBER);
    JS_SetObjectData(ctx, ctx->class_proto[JS_CLASS_NUMBER], JS_NewInt32(ctx, 0));
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_NUMBER],
                               js_number_proto_funcs,
                               countof(js_number_proto_funcs));
    number_obj = JS_NewGlobalCConstructor(ctx, "Number", js_number_constructor, 1,
                                          ctx->class_proto[JS_CLASS_NUMBER]);
    JS_SetPropertyFunctionList(ctx, number_obj, js_number_funcs, countof(js_number_funcs));

    /* Boolean */
    ctx->class_proto[JS_CLASS_BOOLEAN] = JS_NewObjectProtoClass(ctx, ctx->class_proto[JS_CLASS_OBJECT],
                                                                JS_CLASS_BOOLEAN);
    JS_SetObjectData(ctx, ctx->class_proto[JS_CLASS_BOOLEAN], JS_NewBool(ctx, FALSE));
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_BOOLEAN], js_boolean_proto_funcs,
                               countof(js_boolean_proto_funcs));
    JS_NewGlobalCConstructor(ctx, "Boolean", js_boolean_constructor, 1,
                             ctx->class_proto[JS_CLASS_BOOLEAN]);

    /* String */
    ctx->class_proto[JS_CLASS_STRING] = JS_NewObjectProtoClass(ctx, ctx->class_proto[JS_CLASS_OBJECT],
                                                               JS_CLASS_STRING);
    JS_SetObjectData(ctx, ctx->class_proto[JS_CLASS_STRING], JS_AtomToString(ctx, JS_ATOM_empty_string));
    obj = JS_NewGlobalCConstructor(ctx, "String", js_string_constructor, 1,
                                   ctx->class_proto[JS_CLASS_STRING]);
    JS_SetPropertyFunctionList(ctx, obj, js_string_funcs,
                               countof(js_string_funcs));
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_STRING], js_string_proto_funcs,
                               countof(js_string_proto_funcs));

    ctx->class_proto[JS_CLASS_STRING_ITERATOR] = JS_NewObjectProto(ctx, ctx->iterator_proto);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_STRING_ITERATOR],
                               js_string_iterator_proto_funcs,
                               countof(js_string_iterator_proto_funcs));

    /* Math: create as autoinit object */
    js_random_init(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->global_obj, js_math_obj, countof(js_math_obj));

    /* ES6 Reflect: create as autoinit object */
    JS_SetPropertyFunctionList(ctx, ctx->global_obj, js_reflect_obj, countof(js_reflect_obj));

    /* ES6 Symbol */
    ctx->class_proto[JS_CLASS_SYMBOL] = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_SYMBOL], js_symbol_proto_funcs,
                               countof(js_symbol_proto_funcs));
    obj = JS_NewGlobalCConstructor(ctx, "Symbol", js_symbol_constructor, 0,
                                   ctx->class_proto[JS_CLASS_SYMBOL]);
    JS_SetPropertyFunctionList(ctx, obj, js_symbol_funcs,
                               countof(js_symbol_funcs));
    for(i = JS_ATOM_Symbol_toPrimitive; i < JS_ATOM_END; i++) {
        char buf[ATOM_GET_STR_BUF_SIZE];
        const char *str, *p;
        str = JS_AtomGetStr(ctx, buf, sizeof(buf), i);
        /* skip "Symbol." */
        p = strchr(str, '.');
        if (p)
            str = p + 1;
        JS_DefinePropertyValueStr(ctx, obj, str, JS_AtomToValue(ctx, i), 0);
    }

    /* ES6 Generator */
    ctx->class_proto[JS_CLASS_GENERATOR] = JS_NewObjectProto(ctx, ctx->iterator_proto);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_GENERATOR],
                               js_generator_proto_funcs,
                               countof(js_generator_proto_funcs));

    ctx->class_proto[JS_CLASS_GENERATOR_FUNCTION] = JS_NewObjectProto(ctx, ctx->function_proto);
    obj1 = JS_NewCFunctionMagic(ctx, js_function_constructor,
                                "GeneratorFunction", 1,
                                JS_CFUNC_constructor_or_func_magic, JS_FUNC_GENERATOR);
    JS_SetPropertyFunctionList(ctx,
                               ctx->class_proto[JS_CLASS_GENERATOR_FUNCTION],
                               js_generator_function_proto_funcs,
                               countof(js_generator_function_proto_funcs));
    JS_SetConstructor2(ctx, ctx->class_proto[JS_CLASS_GENERATOR_FUNCTION],
                       ctx->class_proto[JS_CLASS_GENERATOR],
                       JS_PROP_CONFIGURABLE, JS_PROP_CONFIGURABLE);
    JS_SetConstructor2(ctx, obj1, ctx->class_proto[JS_CLASS_GENERATOR_FUNCTION],
                       0, JS_PROP_CONFIGURABLE);
    JS_FreeValue(ctx, obj1);

    /* global properties */
    ctx->eval_obj = JS_NewCFunction(ctx, js_global_eval, "eval", 1);
    JS_DefinePropertyValue(ctx, ctx->global_obj, JS_ATOM_eval,
                           JS_DupValue(ctx, ctx->eval_obj),
                           JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);

    JS_DefinePropertyValue(ctx, ctx->global_obj, JS_ATOM_globalThis,
                           JS_DupValue(ctx, ctx->global_obj),
                           JS_PROP_CONFIGURABLE | JS_PROP_WRITABLE);
}

/* Typed Arrays */

inline uint8_t const typed_array_size_log2[JS_TYPED_ARRAY_COUNT] = {
    0, 0, 0, 1, 1, 2, 2,
#ifdef CONFIG_BIGNUM
    3, 3, /* BigInt64Array, BigUint64Array */
#endif
    2, 3
};

static JSValue js_array_buffer_constructor3(JSContext *ctx,
                                            JSValueConst new_target,
                                            uint64_t len, JSClassID class_id,
                                            uint8_t *buf,
                                            JSFreeArrayBufferDataFunc *free_func,
                                            void *opaque, BOOL alloc_flag)
{
    JSRuntime *rt = ctx->rt;
    JSValue obj;
    JSArrayBuffer *abuf = NULL;

    obj = js_create_from_ctor(ctx, new_target, class_id);
    if (JS_IsException(obj))
        return obj;
    /* XXX: we are currently limited to 2 GB */
    if (len > INT32_MAX) {
        JS_ThrowRangeError(ctx, "invalid array buffer length");
        goto fail;
    }
    abuf = (JSArrayBuffer*) js_malloc(ctx, sizeof(*abuf));
    if (!abuf)
        goto fail;
    abuf->byte_length = len;
    if (alloc_flag) {
        if (class_id == JS_CLASS_SHARED_ARRAY_BUFFER &&
            rt->sab_funcs.sab_alloc) {
            abuf->data = (uint8_t*) rt->sab_funcs.sab_alloc(rt->sab_funcs.sab_opaque,
                                                 max_int(len, 1));
            if (!abuf->data)
                goto fail;
            memset(abuf->data, 0, len);
        } else {
            /* the allocation must be done after the object creation */
            abuf->data = (uint8_t*) js_mallocz(ctx, max_int(len, 1));
            if (!abuf->data)
                goto fail;
        }
    } else {
        if (class_id == JS_CLASS_SHARED_ARRAY_BUFFER &&
            rt->sab_funcs.sab_dup) {
            rt->sab_funcs.sab_dup(rt->sab_funcs.sab_opaque, buf);
        }
        abuf->data = buf;
    }
    init_list_head(&abuf->array_list);
    abuf->detached = FALSE;
    abuf->shared = (class_id == JS_CLASS_SHARED_ARRAY_BUFFER);
    abuf->opaque = opaque;
    abuf->free_func = free_func;
    if (alloc_flag && buf)
        memcpy(abuf->data, buf, len);
    JS_SetOpaque(obj, abuf);
    return obj;
 fail:
    JS_FreeValue(ctx, obj);
    js_free(ctx, abuf);
    return JS_EXCEPTION;
}

static void js_array_buffer_free(JSRuntime *rt, void *opaque, void *ptr)
{
    js_free_rt(rt, ptr);
}

static JSValue js_array_buffer_constructor2(JSContext *ctx,
                                            JSValueConst new_target,
                                            uint64_t len, JSClassID class_id)
{
    return js_array_buffer_constructor3(ctx, new_target, len, class_id,
                                        NULL, js_array_buffer_free, NULL,
                                        TRUE);
}

static JSValue js_array_buffer_constructor1(JSContext *ctx,
                                            JSValueConst new_target,
                                            uint64_t len)
{
    return js_array_buffer_constructor2(ctx, new_target, len,
                                        JS_CLASS_ARRAY_BUFFER);
}

inline JSValue JS_NewArrayBuffer(JSContext *ctx, uint8_t *buf, size_t len,
                          JSFreeArrayBufferDataFunc *free_func, void *opaque,
                          BOOL is_shared)
{
    return js_array_buffer_constructor3(ctx, JS_UNDEFINED, len,
                                        is_shared ? JS_CLASS_SHARED_ARRAY_BUFFER : JS_CLASS_ARRAY_BUFFER,
                                        buf, free_func, opaque, FALSE);
}

/* create a new ArrayBuffer of length 'len' and copy 'buf' to it */
inline JSValue JS_NewArrayBufferCopy(JSContext *ctx, const uint8_t *buf, size_t len)
{
    return js_array_buffer_constructor3(ctx, JS_UNDEFINED, len,
                                        JS_CLASS_ARRAY_BUFFER,
                                        (uint8_t *)buf,
                                        js_array_buffer_free, NULL,
                                        TRUE);
}

static JSValue js_array_buffer_constructor(JSContext *ctx,
                                           JSValueConst new_target,
                                           int argc, JSValueConst *argv)
{
    uint64_t len;
    if (JS_ToIndex(ctx, &len, argv[0]))
        return JS_EXCEPTION;
    return js_array_buffer_constructor1(ctx, new_target, len);
}

static JSValue js_shared_array_buffer_constructor(JSContext *ctx,
                                                  JSValueConst new_target,
                                                  int argc, JSValueConst *argv)
{
    uint64_t len;
    if (JS_ToIndex(ctx, &len, argv[0]))
        return JS_EXCEPTION;
    return js_array_buffer_constructor2(ctx, new_target, len,
                                        JS_CLASS_SHARED_ARRAY_BUFFER);
}

/* also used for SharedArrayBuffer */
static void js_array_buffer_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSArrayBuffer *abuf = p->u.array_buffer;
    if (abuf) {
        /* The ArrayBuffer finalizer may be called before the typed
           array finalizers using it, so abuf->array_list is not
           necessarily empty. */
        // assert(list_empty(&abuf->array_list));
        if (abuf->shared && rt->sab_funcs.sab_free) {
            rt->sab_funcs.sab_free(rt->sab_funcs.sab_opaque, abuf->data);
        } else {
            if (abuf->free_func)
                abuf->free_func(rt, abuf->opaque, abuf->data);
        }
        js_free_rt(rt, abuf);
    }
}

static JSValue js_array_buffer_isView(JSContext *ctx,
                                      JSValueConst this_val,
                                      int argc, JSValueConst *argv)
{
    JSObject *p;
    BOOL res;
    res = FALSE;
    if (JS_VALUE_GET_TAG(argv[0]) == JS_TAG_OBJECT) {
        p = JS_VALUE_GET_OBJ(argv[0]);
        if (p->class_id >= JS_CLASS_UINT8C_ARRAY &&
            p->class_id <= JS_CLASS_DATAVIEW) {
            res = TRUE;
        }
    }
    return JS_NewBool(ctx, res);
}

static const JSCFunctionListEntry js_array_buffer_funcs[] = {
    JS_CFUNC_DEF("isView", 1, js_array_buffer_isView ),
    JS_CGETSET_DEF("[Symbol.species]", js_get_this, NULL ),
};

static JSValue JS_ThrowTypeErrorDetachedArrayBuffer(JSContext *ctx)
{
    return JS_ThrowTypeError(ctx, "ArrayBuffer is detached");
}

static JSValue js_array_buffer_get_byteLength(JSContext *ctx,
                                              JSValueConst this_val,
                                              int class_id)
{
    auto abuf = (JSArrayBuffer*) JS_GetOpaque2(ctx, this_val, class_id);
    if (!abuf)
        return JS_EXCEPTION;
    /* return 0 if detached */
    return JS_NewUint32(ctx, abuf->byte_length);
}

inline void JS_DetachArrayBuffer(JSContext *ctx, JSValueConst obj)
{
    auto abuf = (JSArrayBuffer*) JS_GetOpaque(obj, JS_CLASS_ARRAY_BUFFER);
    struct list_head *el;

    if (!abuf || abuf->detached)
        return;
    if (abuf->free_func)
        abuf->free_func(ctx->rt, abuf->opaque, abuf->data);
    abuf->data = NULL;
    abuf->byte_length = 0;
    abuf->detached = TRUE;

    list_for_each(el, &abuf->array_list) {
        JSTypedArray *ta;
        JSObject *p;

        ta = list_entry(el, JSTypedArray, link);
        p = ta->obj;
        /* Note: the typed array length and offset fields are not modified */
        if (p->class_id != JS_CLASS_DATAVIEW) {
            p->u.array.count = 0;
            p->u.array.u.ptr = NULL;
        }
    }
}

/* get an ArrayBuffer or SharedArrayBuffer */
static JSArrayBuffer *js_get_array_buffer(JSContext *ctx, JSValueConst obj)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        goto fail;
    p = JS_VALUE_GET_OBJ(obj);
    if (p->class_id != JS_CLASS_ARRAY_BUFFER &&
        p->class_id != JS_CLASS_SHARED_ARRAY_BUFFER) {
    fail:
        JS_ThrowTypeErrorInvalidClass(ctx, JS_CLASS_ARRAY_BUFFER);
        return NULL;
    }
    return p->u.array_buffer;
}

/* return NULL if exception. WARNING: any JS call can detach the
   buffer and render the returned pointer invalid */
inline uint8_t *JS_GetArrayBuffer(JSContext *ctx, size_t *psize, JSValueConst obj)
{
    JSArrayBuffer *abuf = js_get_array_buffer(ctx, obj);
    if (!abuf)
        goto fail;
    if (abuf->detached) {
        JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        goto fail;
    }
    *psize = abuf->byte_length;
    return abuf->data;
 fail:
    *psize = 0;
    return NULL;
}

static JSValue js_array_buffer_slice(JSContext *ctx,
                                     JSValueConst this_val,
                                     int argc, JSValueConst *argv, int class_id)
{
    JSArrayBuffer *abuf, *new_abuf;
    int64_t len, start, end, new_len;
    JSValue ctor, new_obj;

    abuf = (JSArrayBuffer*) JS_GetOpaque2(ctx, this_val, class_id);
    if (!abuf)
        return JS_EXCEPTION;
    if (abuf->detached)
        return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
    len = abuf->byte_length;

    if (JS_ToInt64Clamp(ctx, &start, argv[0], 0, len, len))
        return JS_EXCEPTION;

    end = len;
    if (!JS_IsUndefined(argv[1])) {
        if (JS_ToInt64Clamp(ctx, &end, argv[1], 0, len, len))
            return JS_EXCEPTION;
    }
    new_len = max_int64(end - start, 0);
    ctor = JS_SpeciesConstructor(ctx, this_val, JS_UNDEFINED);
    if (JS_IsException(ctor))
        return ctor;
    if (JS_IsUndefined(ctor)) {
        new_obj = js_array_buffer_constructor2(ctx, JS_UNDEFINED, new_len,
                                               class_id);
    } else {
        JSValue args[1];
        args[0] = JS_NewInt64(ctx, new_len);
        new_obj = JS_CallConstructor(ctx, ctor, 1, (JSValueConst *)args);
        JS_FreeValue(ctx, ctor);
        JS_FreeValue(ctx, args[0]);
    }
    if (JS_IsException(new_obj))
        return new_obj;
    new_abuf = (JSArrayBuffer*) JS_GetOpaque2(ctx, new_obj, class_id);
    if (!new_abuf)
        goto fail;
    if (js_same_value(ctx, new_obj, this_val)) {
        JS_ThrowTypeError(ctx, "cannot use identical ArrayBuffer");
        goto fail;
    }
    if (new_abuf->detached) {
        JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        goto fail;
    }
    if (new_abuf->byte_length < new_len) {
        JS_ThrowTypeError(ctx, "new ArrayBuffer is too small");
        goto fail;
    }
    /* must test again because of side effects */
    if (abuf->detached) {
        JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        goto fail;
    }
    memcpy(new_abuf->data, abuf->data + start, new_len);
    return new_obj;
 fail:
    JS_FreeValue(ctx, new_obj);
    return JS_EXCEPTION;
}

static const JSCFunctionListEntry js_array_buffer_proto_funcs[] = {
    JS_CGETSET_MAGIC_DEF("byteLength", js_array_buffer_get_byteLength, NULL, JS_CLASS_ARRAY_BUFFER ),
    JS_CFUNC_MAGIC_DEF("slice", 2, js_array_buffer_slice, JS_CLASS_ARRAY_BUFFER ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "ArrayBuffer", JS_PROP_CONFIGURABLE ),
};

/* SharedArrayBuffer */

static const JSCFunctionListEntry js_shared_array_buffer_funcs[] = {
    JS_CGETSET_DEF("[Symbol.species]", js_get_this, NULL ),
};

static const JSCFunctionListEntry js_shared_array_buffer_proto_funcs[] = {
    JS_CGETSET_MAGIC_DEF("byteLength", js_array_buffer_get_byteLength, NULL, JS_CLASS_SHARED_ARRAY_BUFFER ),
    JS_CFUNC_MAGIC_DEF("slice", 2, js_array_buffer_slice, JS_CLASS_SHARED_ARRAY_BUFFER ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "SharedArrayBuffer", JS_PROP_CONFIGURABLE ),
};

static JSObject *get_typed_array(JSContext *ctx,
                                 JSValueConst this_val,
                                 int is_dataview)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(this_val) != JS_TAG_OBJECT)
        goto fail;
    p = JS_VALUE_GET_OBJ(this_val);
    if (is_dataview) {
        if (p->class_id != JS_CLASS_DATAVIEW)
            goto fail;
    } else {
        if (!(p->class_id >= JS_CLASS_UINT8C_ARRAY &&
              p->class_id <= JS_CLASS_FLOAT64_ARRAY)) {
        fail:
            JS_ThrowTypeError(ctx, "not a %s", is_dataview ? "DataView" : "TypedArray");
            return NULL;
        }
    }
    return p;
}

/* WARNING: 'p' must be a typed array */
static BOOL typed_array_is_detached(JSContext *ctx, JSObject *p)
{
    JSTypedArray *ta = p->u.typed_array;
    JSArrayBuffer *abuf = ta->buffer->u.array_buffer;
    /* XXX: could simplify test by ensuring that
       p->u.array.u.ptr is NULL iff it is detached */
    return abuf->detached;
}

/* WARNING: 'p' must be a typed array. Works even if the array buffer
   is detached */
static uint32_t typed_array_get_length(JSContext *ctx, JSObject *p)
{
    JSTypedArray *ta = p->u.typed_array;
    int size_log2 = typed_array_size_log2(p->class_id);
    return ta->length >> size_log2;
}

static int validate_typed_array(JSContext *ctx, JSValueConst this_val)
{
    JSObject *p;
    p = get_typed_array(ctx, this_val, 0);
    if (!p)
        return -1;
    if (typed_array_is_detached(ctx, p)) {
        JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        return -1;
    }
    return 0;
}

static JSValue js_typed_array_get_length(JSContext *ctx,
                                         JSValueConst this_val)
{
    JSObject *p;
    p = get_typed_array(ctx, this_val, 0);
    if (!p)
        return JS_EXCEPTION;
    return JS_NewInt32(ctx, p->u.array.count);
}

static JSValue js_typed_array_get_buffer(JSContext *ctx,
                                         JSValueConst this_val, int is_dataview)
{
    JSObject *p;
    JSTypedArray *ta;
    p = get_typed_array(ctx, this_val, is_dataview);
    if (!p)
        return JS_EXCEPTION;
    ta = p->u.typed_array;
    return JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, ta->buffer));
}

static JSValue js_typed_array_get_byteLength(JSContext *ctx,
                                             JSValueConst this_val,
                                             int is_dataview)
{
    JSObject *p;
    JSTypedArray *ta;
    p = get_typed_array(ctx, this_val, is_dataview);
    if (!p)
        return JS_EXCEPTION;
    if (typed_array_is_detached(ctx, p)) {
        if (is_dataview) {
            return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        } else {
            return JS_NewInt32(ctx, 0);
        }
    }
    ta = p->u.typed_array;
    return JS_NewInt32(ctx, ta->length);
}

static JSValue js_typed_array_get_byteOffset(JSContext *ctx,
                                             JSValueConst this_val,
                                             int is_dataview)
{
    JSObject *p;
    JSTypedArray *ta;
    p = get_typed_array(ctx, this_val, is_dataview);
    if (!p)
        return JS_EXCEPTION;
    if (typed_array_is_detached(ctx, p)) {
        if (is_dataview) {
            return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        } else {
            return JS_NewInt32(ctx, 0);
        }
    }
    ta = p->u.typed_array;
    return JS_NewInt32(ctx, ta->offset);
}

/* Return the buffer associated to the typed array or an exception if
   it is not a typed array or if the buffer is detached. pbyte_offset,
   pbyte_length or pbytes_per_element can be NULL. */
inline JSValue JS_GetTypedArrayBuffer(JSContext *ctx, JSValueConst obj,
                               size_t *pbyte_offset,
                               size_t *pbyte_length,
                               size_t *pbytes_per_element)
{
    JSObject *p;
    JSTypedArray *ta;
    p = get_typed_array(ctx, obj, FALSE);
    if (!p)
        return JS_EXCEPTION;
    if (typed_array_is_detached(ctx, p))
        return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
    ta = p->u.typed_array;
    if (pbyte_offset)
        *pbyte_offset = ta->offset;
    if (pbyte_length)
        *pbyte_length = ta->length;
    if (pbytes_per_element) {
        *pbytes_per_element = 1 << typed_array_size_log2(p->class_id);
    }
    return JS_DupValue(ctx, JS_MKPTR(JS_TAG_OBJECT, ta->buffer));
}

static JSValue js_typed_array_get_toStringTag(JSContext *ctx,
                                              JSValueConst this_val)
{
    JSObject *p;
    if (JS_VALUE_GET_TAG(this_val) != JS_TAG_OBJECT)
        return JS_UNDEFINED;
    p = JS_VALUE_GET_OBJ(this_val);
    if (!(p->class_id >= JS_CLASS_UINT8C_ARRAY &&
          p->class_id <= JS_CLASS_FLOAT64_ARRAY))
        return JS_UNDEFINED;
    return JS_AtomToString(ctx, ctx->rt->class_array[p->class_id].class_name);
}

static JSValue js_typed_array_set_internal(JSContext *ctx,
                                           JSValueConst dst,
                                           JSValueConst src,
                                           JSValueConst off)
{
    JSObject *p;
    JSObject *src_p;
    uint32_t i;
    int64_t src_len, offset;
    JSValue val, src_obj = JS_UNDEFINED;

    p = get_typed_array(ctx, dst, 0);
    if (!p)
        goto fail;
    if (JS_ToInt64Sat(ctx, &offset, off))
        goto fail;
    if (offset < 0)
        goto range_error;
    if (typed_array_is_detached(ctx, p)) {
    detached:
        JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        goto fail;
    }
    src_obj = JS_ToObject(ctx, src);
    if (JS_IsException(src_obj))
        goto fail;
    src_p = JS_VALUE_GET_OBJ(src_obj);
    if (src_p->class_id >= JS_CLASS_UINT8C_ARRAY &&
        src_p->class_id <= JS_CLASS_FLOAT64_ARRAY) {
        JSTypedArray *dest_ta = p->u.typed_array;
        JSArrayBuffer *dest_abuf = dest_ta->buffer->u.array_buffer;
        JSTypedArray *src_ta = src_p->u.typed_array;
        JSArrayBuffer *src_abuf = src_ta->buffer->u.array_buffer;
        int shift = typed_array_size_log2(p->class_id);

        if (src_abuf->detached)
            goto detached;

        src_len = src_p->u.array.count;
        if (offset > (int64_t)(p->u.array.count - src_len))
            goto range_error;

        /* copying between typed objects */
        if (src_p->class_id == p->class_id) {
            /* same type, use memmove */
            memmove(dest_abuf->data + dest_ta->offset + (offset << shift),
                    src_abuf->data + src_ta->offset, src_len << shift);
            goto done;
        }
        if (dest_abuf->data == src_abuf->data) {
            /* copying between the same buffer using different types of mappings
               would require a temporary buffer */
        }
        /* otherwise, default behavior is slow but correct */
    } else {
        if (js_get_length64(ctx, &src_len, src_obj))
            goto fail;
        if (offset > (int64_t)(p->u.array.count - src_len)) {
        range_error:
            JS_ThrowRangeError(ctx, "invalid array length");
            goto fail;
        }
    }
    for(i = 0; i < src_len; i++) {
        val = JS_GetPropertyUint32(ctx, src_obj, i);
        if (JS_IsException(val))
            goto fail;
        if (JS_SetPropertyUint32(ctx, dst, offset + i, val) < 0)
            goto fail;
    }
done:
    JS_FreeValue(ctx, src_obj);
    return JS_UNDEFINED;
fail:
    JS_FreeValue(ctx, src_obj);
    return JS_EXCEPTION;
}

static JSValue js_typed_array_set(JSContext *ctx,
                                  JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    JSValueConst offset = JS_UNDEFINED;
    if (argc > 1) {
        offset = argv[1];
    }
    return js_typed_array_set_internal(ctx, this_val, argv[0], offset);
}

static JSValue js_create_typed_array_iterator(JSContext *ctx, JSValueConst this_val,
                                              int argc, JSValueConst *argv, int magic)
{
    if (validate_typed_array(ctx, this_val))
        return JS_EXCEPTION;
    return js_create_array_iterator(ctx, this_val, argc, argv, magic);
}

/* return < 0 if exception */
static int js_typed_array_get_length_internal(JSContext *ctx,
                                              JSValueConst obj)
{
    JSObject *p;
    p = get_typed_array(ctx, obj, 0);
    if (!p)
        return -1;
    if (typed_array_is_detached(ctx, p)) {
        JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        return -1;
    }
    return p->u.array.count;
}

#if 0
/* validate a typed array and return its length */
static JSValue js_typed_array___getLength(JSContext *ctx,
                                          JSValueConst this_val,
                                          int argc, JSValueConst *argv)
{
    BOOL ignore_detached = JS_ToBool(ctx, argv[1]);

    if (ignore_detached) {
        return js_typed_array_get_length(ctx, argv[0]);
    } else {
        int len;
        len = js_typed_array_get_length_internal(ctx, argv[0]);
        if (len < 0)
            return JS_EXCEPTION;
        return JS_NewInt32(ctx, len);
    }
}
#endif

static JSValue js_typed_array_create(JSContext *ctx, JSValueConst ctor,
                                     int argc, JSValueConst *argv)
{
    JSValue ret;
    int new_len;
    int64_t len;

    ret = JS_CallConstructor(ctx, ctor, argc, argv);
    if (JS_IsException(ret))
        return ret;
    /* validate the typed array */
    new_len = js_typed_array_get_length_internal(ctx, ret);
    if (new_len < 0)
        goto fail;
    if (argc == 1) {
        /* ensure that it is large enough */
        if (JS_ToLengthFree(ctx, &len, JS_DupValue(ctx, argv[0])))
            goto fail;
        if (new_len < len) {
            JS_ThrowTypeError(ctx, "TypedArray length is too small");
        fail:
            JS_FreeValue(ctx, ret);
            return JS_EXCEPTION;
        }
    }
    return ret;
}

#if 0
static JSValue js_typed_array___create(JSContext *ctx,
                                       JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    return js_typed_array_create(ctx, argv[0], max_int(argc - 1, 0), argv + 1);
}
#endif

static JSValue js_typed_array___speciesCreate(JSContext *ctx,
                                              JSValueConst this_val,
                                              int argc, JSValueConst *argv)
{
    JSValueConst obj;
    JSObject *p;
    JSValue ctor, ret;
    int argc1;

    obj = argv[0];
    p = get_typed_array(ctx, obj, 0);
    if (!p)
        return JS_EXCEPTION;
    ctor = JS_SpeciesConstructor(ctx, obj, JS_UNDEFINED);
    if (JS_IsException(ctor))
        return ctor;
    argc1 = max_int(argc - 1, 0);
    if (JS_IsUndefined(ctor)) {
        ret = js_typed_array_constructor(ctx, JS_UNDEFINED, argc1, argv + 1,
                                         p->class_id);
    } else {
        ret = js_typed_array_create(ctx, ctor, argc1, argv + 1);
        JS_FreeValue(ctx, ctor);
    }
    return ret;
}

static JSValue js_typed_array_from(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    // from(items, mapfn = void 0, this_arg = void 0)
    JSValueConst items = argv[0], mapfn, this_arg;
    JSValueConst args[2];
    JSValue stack[2];
    JSValue iter, arr, r, v, v2;
    int64_t k, len;
    int done, mapping;

    mapping = FALSE;
    mapfn = JS_UNDEFINED;
    this_arg = JS_UNDEFINED;
    r = JS_UNDEFINED;
    arr = JS_UNDEFINED;
    stack[0] = JS_UNDEFINED;
    stack[1] = JS_UNDEFINED;

    if (argc > 1) {
        mapfn = argv[1];
        if (!JS_IsUndefined(mapfn)) {
            if (check_function(ctx, mapfn))
                goto exception;
            mapping = 1;
            if (argc > 2)
                this_arg = argv[2];
        }
    }
    iter = JS_GetProperty(ctx, items, JS_ATOM_Symbol_iterator);
    if (JS_IsException(iter))
        goto exception;
    if (!JS_IsUndefined(iter)) {
        JS_FreeValue(ctx, iter);
        arr = JS_NewArray(ctx);
        if (JS_IsException(arr))
            goto exception;
        stack[0] = JS_DupValue(ctx, items);
        if (js_for_of_start(ctx, &stack[1], FALSE))
            goto exception;
        for (k = 0;; k++) {
            v = JS_IteratorNext(ctx, stack[0], stack[1], 0, NULL, &done);
            if (JS_IsException(v))
                goto exception_close;
            if (done)
                break;
            if (JS_DefinePropertyValueInt64(ctx, arr, k, v, JS_PROP_C_W_E | JS_PROP_THROW) < 0)
                goto exception_close;
        }
    } else {
        arr = JS_ToObject(ctx, items);
        if (JS_IsException(arr))
            goto exception;
    }
    if (js_get_length64(ctx, &len, arr) < 0)
        goto exception;
    v = JS_NewInt64(ctx, len);
    args[0] = v;
    r = js_typed_array_create(ctx, this_val, 1, args);
    JS_FreeValue(ctx, v);
    if (JS_IsException(r))
        goto exception;
    for(k = 0; k < len; k++) {
        v = JS_GetPropertyInt64(ctx, arr, k);
        if (JS_IsException(v))
            goto exception;
        if (mapping) {
            args[0] = v;
            args[1] = JS_NewInt32(ctx, k);
            v2 = JS_Call(ctx, mapfn, this_arg, 2, args);
            JS_FreeValue(ctx, v);
            v = v2;
            if (JS_IsException(v))
                goto exception;
        }
        if (JS_SetPropertyInt64(ctx, r, k, v) < 0)
            goto exception;
    }
    goto done;

 exception_close:
    if (!JS_IsUndefined(stack[0]))
        JS_IteratorClose(ctx, stack[0], TRUE);
 exception:
    JS_FreeValue(ctx, r);
    r = JS_EXCEPTION;
 done:
    JS_FreeValue(ctx, arr);
    JS_FreeValue(ctx, stack[0]);
    JS_FreeValue(ctx, stack[1]);
    return r;
}

static JSValue js_typed_array_of(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
{
    JSValue obj;
    JSValueConst args[1];
    int i;

    args[0] = JS_NewInt32(ctx, argc);
    obj = js_typed_array_create(ctx, this_val, 1, args);
    if (JS_IsException(obj))
        return obj;

    for(i = 0; i < argc; i++) {
        if (JS_SetPropertyUint32(ctx, obj, i, JS_DupValue(ctx, argv[i])) < 0) {
            JS_FreeValue(ctx, obj);
            return JS_EXCEPTION;
        }
    }
    return obj;
}

static JSValue js_typed_array_copyWithin(JSContext *ctx, JSValueConst this_val,
                                         int argc, JSValueConst *argv)
{
    JSObject *p;
    int len, to, from, final, count, shift;

    len = js_typed_array_get_length_internal(ctx, this_val);
    if (len < 0)
        return JS_EXCEPTION;

    if (JS_ToInt32Clamp(ctx, &to, argv[0], 0, len, len))
        return JS_EXCEPTION;

    if (JS_ToInt32Clamp(ctx, &from, argv[1], 0, len, len))
        return JS_EXCEPTION;

    final = len;
    if (argc > 2 && !JS_IsUndefined(argv[2])) {
        if (JS_ToInt32Clamp(ctx, &final, argv[2], 0, len, len))
            return JS_EXCEPTION;
    }

    count = min_int(final - from, len - to);
    if (count > 0) {
        p = JS_VALUE_GET_OBJ(this_val);
        if (typed_array_is_detached(ctx, p))
            return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        shift = typed_array_size_log2(p->class_id);
        memmove(p->u.array.u.uint8_ptr + (to << shift),
                p->u.array.u.uint8_ptr + (from << shift),
                count << shift);
    }
    return JS_DupValue(ctx, this_val);
}

static JSValue js_typed_array_fill(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    JSObject *p;
    int len, k, final, shift;
    uint64_t v64;

    len = js_typed_array_get_length_internal(ctx, this_val);
    if (len < 0)
        return JS_EXCEPTION;
    p = JS_VALUE_GET_OBJ(this_val);

    if (p->class_id == JS_CLASS_UINT8C_ARRAY) {
        int32_t v;
        if (JS_ToUint8ClampFree(ctx, &v, JS_DupValue(ctx, argv[0])))
            return JS_EXCEPTION;
        v64 = v;
    } else if (p->class_id <= JS_CLASS_UINT32_ARRAY) {
        uint32_t v;
        if (JS_ToUint32(ctx, &v, argv[0]))
            return JS_EXCEPTION;
        v64 = v;
    } else
#ifdef CONFIG_BIGNUM
    if (p->class_id <= JS_CLASS_BIG_UINT64_ARRAY) {
        if (JS_ToBigInt64(ctx, (int64_t *)&v64, argv[0]))
            return JS_EXCEPTION;
    } else
#endif
    {
        double d;
        if (JS_ToFloat64(ctx, &d, argv[0]))
            return JS_EXCEPTION;
        if (p->class_id == JS_CLASS_FLOAT32_ARRAY) {
            union {
                float f;
                uint32_t u32;
            } u;
            u.f = d;
            v64 = u.u32;
        } else {
            JSFloat64Union u;
            u.d = d;
            v64 = u.u64;
        }
    }

    k = 0;
    if (argc > 1) {
        if (JS_ToInt32Clamp(ctx, &k, argv[1], 0, len, len))
            return JS_EXCEPTION;
    }

    final = len;
    if (argc > 2 && !JS_IsUndefined(argv[2])) {
        if (JS_ToInt32Clamp(ctx, &final, argv[2], 0, len, len))
            return JS_EXCEPTION;
    }

    if (typed_array_is_detached(ctx, p))
        return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);

    shift = typed_array_size_log2(p->class_id);
    switch(shift) {
    case 0:
        if (k < final) {
            memset(p->u.array.u.uint8_ptr + k, v64, final - k);
        }
        break;
    case 1:
        for(; k < final; k++) {
            p->u.array.u.uint16_ptr[k] = v64;
        }
        break;
    case 2:
        for(; k < final; k++) {
            p->u.array.u.uint32_ptr[k] = v64;
        }
        break;
    case 3:
        for(; k < final; k++) {
            p->u.array.u.uint64_ptr[k] = v64;
        }
        break;
    default:
        abort();
    }
    return JS_DupValue(ctx, this_val);
}

static JSValue js_typed_array_find(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv, int findIndex)
{
    JSValueConst func, this_arg;
    JSValueConst args[3];
    JSValue val, index_val, res;
    int len, k;

    val = JS_UNDEFINED;
    len = js_typed_array_get_length_internal(ctx, this_val);
    if (len < 0)
        goto exception;

    func = argv[0];
    if (check_function(ctx, func))
        goto exception;

    this_arg = JS_UNDEFINED;
    if (argc > 1)
        this_arg = argv[1];

    for(k = 0; k < len; k++) {
        index_val = JS_NewInt32(ctx, k);
        val = JS_GetPropertyValue(ctx, this_val, index_val);
        if (JS_IsException(val))
            goto exception;
        args[0] = val;
        args[1] = index_val;
        args[2] = this_val;
        res = JS_Call(ctx, func, this_arg, 3, args);
        if (JS_IsException(res))
            goto exception;
        if (JS_ToBoolFree(ctx, res)) {
            if (findIndex) {
                JS_FreeValue(ctx, val);
                return index_val;
            } else {
                return val;
            }
        }
        JS_FreeValue(ctx, val);
    }
    if (findIndex)
        return JS_NewInt32(ctx, -1);
    else
        return JS_UNDEFINED;

exception:
    JS_FreeValue(ctx, val);
    return JS_EXCEPTION;
}

#define special_indexOf 0
#define special_lastIndexOf 1
#define special_includes -1

static JSValue js_typed_array_indexOf(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv, int special)
{
    JSObject *p;
    int len, tag, is_int, is_bigint, k, stop, inc, res = -1;
    int64_t v64;
    double d;
    float f;

    len = js_typed_array_get_length_internal(ctx, this_val);
    if (len < 0)
        goto exception;
    if (len == 0)
        goto done;

    if (special == special_lastIndexOf) {
        k = len - 1;
        if (argc > 1) {
            if (JS_ToFloat64(ctx, &d, argv[1]))
                goto exception;
            if (isnan(d)) {
                k = 0;
            } else {
                if (d >= 0) {
                    if (d < k) {
                        k = d;
                    }
                } else {
                    d += len;
                    if (d < 0)
                        goto done;
                    k = d;
                }
            }
        }
        stop = -1;
        inc = -1;
    } else {
        k = 0;
        if (argc > 1) {
            if (JS_ToInt32Clamp(ctx, &k, argv[1], 0, len, len))
                goto exception;
        }
        stop = len;
        inc = 1;
    }

    p = JS_VALUE_GET_OBJ(this_val);
    /* if the array was detached, no need to go further (but no
       exception is raised) */
    if (typed_array_is_detached(ctx, p)) {
        /* "includes" scans all the properties, so "undefined" can match */
        if (special == special_includes && JS_IsUndefined(argv[0]) && len > 0)
            res = 0;
        goto done;
    }

    is_bigint = 0;
    is_int = 0; /* avoid warning */
    v64 = 0; /* avoid warning */
    tag = JS_VALUE_GET_NORM_TAG(argv[0]);
    if (tag == JS_TAG_INT) {
        is_int = 1;
        v64 = JS_VALUE_GET_INT(argv[0]);
        d = v64;
    } else
    if (tag == JS_TAG_FLOAT64) {
        d = JS_VALUE_GET_FLOAT64(argv[0]);
        v64 = d;
        is_int = (v64 == d);
    } else
#ifdef CONFIG_BIGNUM
    if (tag == JS_TAG_BIG_INT) {
        JSBigFloat *p1 = JS_VALUE_GET_PTR(argv[0]);

        if (p->class_id == JS_CLASS_BIG_INT64_ARRAY) {
            if (bf_get_int64(&v64, &p1->num, 0) != 0)
                goto done;
        } else if (p->class_id == JS_CLASS_BIG_UINT64_ARRAY) {
            if (bf_get_uint64((uint64_t *)&v64, &p1->num) != 0)
                goto done;
        } else {
            goto done;
        }
        d = 0;
        is_bigint = 1;
    } else
#endif
    {
        goto done;
    }

    switch (p->class_id) {
    case JS_CLASS_INT8_ARRAY:
        if (is_int && (int8_t)v64 == v64)
            goto scan8;
        break;
    case JS_CLASS_UINT8C_ARRAY:
    case JS_CLASS_UINT8_ARRAY:
        if (is_int && (uint8_t)v64 == v64) {
            const uint8_t *pv, *pp;
            uint16_t v;
        scan8:
            pv = p->u.array.u.uint8_ptr;
            v = v64;
            if (inc > 0) {
                pp = (const uint8_t*) memchr(pv + k, v, len - k);
                if (pp)
                    res = pp - pv;
            } else {
                for (; k != stop; k += inc) {
                    if (pv[k] == v) {
                        res = k;
                        break;
                    }
                }
            }
        }
        break;
    case JS_CLASS_INT16_ARRAY:
        if (is_int && (int16_t)v64 == v64)
            goto scan16;
        break;
    case JS_CLASS_UINT16_ARRAY:
        if (is_int && (uint16_t)v64 == v64) {
            const uint16_t *pv;
            uint16_t v;
        scan16:
            pv = p->u.array.u.uint16_ptr;
            v = v64;
            for (; k != stop; k += inc) {
                if (pv[k] == v) {
                    res = k;
                    break;
                }
            }
        }
        break;
    case JS_CLASS_INT32_ARRAY:
        if (is_int && (int32_t)v64 == v64)
            goto scan32;
        break;
    case JS_CLASS_UINT32_ARRAY:
        if (is_int && (uint32_t)v64 == v64) {
            const uint32_t *pv;
            uint32_t v;
        scan32:
            pv = p->u.array.u.uint32_ptr;
            v = v64;
            for (; k != stop; k += inc) {
                if (pv[k] == v) {
                    res = k;
                    break;
                }
            }
        }
        break;
    case JS_CLASS_FLOAT32_ARRAY:
        if (is_bigint)
            break;
        if (isnan(d)) {
            const float *pv = p->u.array.u.float_ptr;
            /* special case: indexOf returns -1, includes finds NaN */
            if (special != special_includes)
                goto done;
            for (; k != stop; k += inc) {
                if (isnan(pv[k])) {
                    res = k;
                    break;
                }
            }
        } else if ((f = (float)d) == d) {
            const float *pv = p->u.array.u.float_ptr;
            for (; k != stop; k += inc) {
                if (pv[k] == f) {
                    res = k;
                    break;
                }
            }
        }
        break;
    case JS_CLASS_FLOAT64_ARRAY:
        if (is_bigint)
            break;
        if (isnan(d)) {
            const double *pv = p->u.array.u.double_ptr;
            /* special case: indexOf returns -1, includes finds NaN */
            if (special != special_includes)
                goto done;
            for (; k != stop; k += inc) {
                if (isnan(pv[k])) {
                    res = k;
                    break;
                }
            }
        } else {
            const double *pv = p->u.array.u.double_ptr;
            for (; k != stop; k += inc) {
                if (pv[k] == d) {
                    res = k;
                    break;
                }
            }
        }
        break;
#ifdef CONFIG_BIGNUM
    case JS_CLASS_BIG_INT64_ARRAY:
        if (is_bigint || (is_math_mode(ctx) && is_int &&
                          v64 >= -MAX_SAFE_INTEGER &&
                          v64 <= MAX_SAFE_INTEGER)) {
            goto scan64;
        }
        break;
    case JS_CLASS_BIG_UINT64_ARRAY:
        if (is_bigint || (is_math_mode(ctx) && is_int &&
                          v64 >= 0 && v64 <= MAX_SAFE_INTEGER)) {
            const uint64_t *pv;
            uint64_t v;
        scan64:
            pv = p->u.array.u.uint64_ptr;
            v = v64;
            for (; k != stop; k += inc) {
                if (pv[k] == v) {
                    res = k;
                    break;
                }
            }
        }
        break;
#endif
    }

done:
    if (special == special_includes)
        return JS_NewBool(ctx, res >= 0);
    else
        return JS_NewInt32(ctx, res);

exception:
    return JS_EXCEPTION;
}

static JSValue js_typed_array_join(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv, int toLocaleString)
{
    JSValue sep = JS_UNDEFINED, el;
    StringBuffer b_s, *b = &b_s;
    JSString *p = NULL;
    int i, n;
    int c;

    n = js_typed_array_get_length_internal(ctx, this_val);
    if (n < 0)
        goto exception;

    c = ',';    /* default separator */
    if (!toLocaleString && argc > 0 && !JS_IsUndefined(argv[0])) {
        sep = JS_ToString(ctx, argv[0]);
        if (JS_IsException(sep))
            goto exception;
        p = JS_VALUE_GET_STRING(sep);
        if (p->len == 1 && !p->is_wide_char)
            c = p->u.str8[0];
        else
            c = -1;
    }
    string_buffer_init(ctx, b, 0);

    /* XXX: optimize with direct access */
    for(i = 0; i < n; i++) {
        if (i > 0) {
            if (c >= 0) {
                if (string_buffer_putc8(b, c))
                    goto fail;
            } else {
                if (string_buffer_concat(b, p, 0, p->len))
                    goto fail;
            }
        }
        el = JS_GetPropertyUint32(ctx, this_val, i);
        /* Can return undefined for example if the typed array is detached */
        if (!JS_IsNull(el) && !JS_IsUndefined(el)) {
            if (JS_IsException(el))
                goto fail;
            if (toLocaleString) {
                el = JS_ToLocaleStringFree(ctx, el);
            }
            if (string_buffer_concat_value_free(b, el))
                goto fail;
        }
    }
    JS_FreeValue(ctx, sep);
    return string_buffer_end(b);

fail:
    string_buffer_free(b);
    JS_FreeValue(ctx, sep);
exception:
    return JS_EXCEPTION;
}

static JSValue js_typed_array_reverse(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv)
{
    JSObject *p;
    int len;

    len = js_typed_array_get_length_internal(ctx, this_val);
    if (len < 0)
        return JS_EXCEPTION;
    if (len > 0) {
        p = JS_VALUE_GET_OBJ(this_val);
        switch (typed_array_size_log2(p->class_id)) {
        case 0:
            {
                uint8_t *p1 = p->u.array.u.uint8_ptr;
                uint8_t *p2 = p1 + len - 1;
                while (p1 < p2) {
                    uint8_t v = *p1;
                    *p1++ = *p2;
                    *p2-- = v;
                }
            }
            break;
        case 1:
            {
                uint16_t *p1 = p->u.array.u.uint16_ptr;
                uint16_t *p2 = p1 + len - 1;
                while (p1 < p2) {
                    uint16_t v = *p1;
                    *p1++ = *p2;
                    *p2-- = v;
                }
            }
            break;
        case 2:
            {
                uint32_t *p1 = p->u.array.u.uint32_ptr;
                uint32_t *p2 = p1 + len - 1;
                while (p1 < p2) {
                    uint32_t v = *p1;
                    *p1++ = *p2;
                    *p2-- = v;
                }
            }
            break;
        case 3:
            {
                uint64_t *p1 = p->u.array.u.uint64_ptr;
                uint64_t *p2 = p1 + len - 1;
                while (p1 < p2) {
                    uint64_t v = *p1;
                    *p1++ = *p2;
                    *p2-- = v;
                }
            }
            break;
        default:
            abort();
        }
    }
    return JS_DupValue(ctx, this_val);
}

static JSValue js_typed_array_slice(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    JSValueConst args[2];
    JSValue arr, val;
    JSObject *p, *p1;
    int n, len, start, final, count, shift;

    arr = JS_UNDEFINED;
    len = js_typed_array_get_length_internal(ctx, this_val);
    if (len < 0)
        goto exception;

    if (JS_ToInt32Clamp(ctx, &start, argv[0], 0, len, len))
        goto exception;
    final = len;
    if (!JS_IsUndefined(argv[1])) {
        if (JS_ToInt32Clamp(ctx, &final, argv[1], 0, len, len))
            goto exception;
    }
    count = max_int(final - start, 0);

    p = get_typed_array(ctx, this_val, 0);
    if (p == NULL)
        goto exception;
    shift = typed_array_size_log2(p->class_id);

    args[0] = this_val;
    args[1] = JS_NewInt32(ctx, count);
    arr = js_typed_array___speciesCreate(ctx, JS_UNDEFINED, 2, args);
    if (JS_IsException(arr))
        goto exception;

    if (count > 0) {
        if (validate_typed_array(ctx, this_val)
        ||  validate_typed_array(ctx, arr))
            goto exception;

        p1 = get_typed_array(ctx, arr, 0);
        if (p1 != NULL && p->class_id == p1->class_id &&
            typed_array_get_length(ctx, p1) >= count &&
            typed_array_get_length(ctx, p) >= start + count) {
            memcpy(p1->u.array.u.uint8_ptr,
                   p->u.array.u.uint8_ptr + (start << shift),
                   count << shift);
        } else {
            for (n = 0; n < count; n++) {
                val = JS_GetPropertyValue(ctx, this_val, JS_NewInt32(ctx, start + n));
                if (JS_IsException(val))
                    goto exception;
                if (JS_SetPropertyValue(ctx, arr, JS_NewInt32(ctx, n), val,
                                        JS_PROP_THROW) < 0)
                    goto exception;
            }
        }
    }
    return arr;

 exception:
    JS_FreeValue(ctx, arr);
    return JS_EXCEPTION;
}

static JSValue js_typed_array_subarray(JSContext *ctx, JSValueConst this_val,
                                       int argc, JSValueConst *argv)
{
    JSValueConst args[4];
    JSValue arr, byteOffset, ta_buffer;
    JSObject *p;
    int len, start, final, count, shift, offset;

    p = get_typed_array(ctx, this_val, 0);
    if (!p)
        goto exception;
    len = p->u.array.count;
    if (JS_ToInt32Clamp(ctx, &start, argv[0], 0, len, len))
        goto exception;

    final = len;
    if (!JS_IsUndefined(argv[1])) {
        if (JS_ToInt32Clamp(ctx, &final, argv[1], 0, len, len))
            goto exception;
    }
    count = max_int(final - start, 0);
    byteOffset = js_typed_array_get_byteOffset(ctx, this_val, 0);
    if (JS_IsException(byteOffset))
        goto exception;
    shift = typed_array_size_log2(p->class_id);
    offset = JS_VALUE_GET_INT(byteOffset) + (start << shift);
    JS_FreeValue(ctx, byteOffset);
    ta_buffer = js_typed_array_get_buffer(ctx, this_val, 0);
    if (JS_IsException(ta_buffer))
        goto exception;
    args[0] = this_val;
    args[1] = ta_buffer;
    args[2] = JS_NewInt32(ctx, offset);
    args[3] = JS_NewInt32(ctx, count);
    arr = js_typed_array___speciesCreate(ctx, JS_UNDEFINED, 4, args);
    JS_FreeValue(ctx, ta_buffer);
    return arr;

 exception:
    return JS_EXCEPTION;
}

/* TypedArray.prototype.sort */

static int js_cmp_doubles(double x, double y)
{
    if (isnan(x))    return isnan(y) ? 0 : +1;
    if (isnan(y))    return -1;
    if (x < y)       return -1;
    if (x > y)       return 1;
    if (x != 0)      return 0;
    if (signbit(x))  return signbit(y) ? 0 : -1;
    else             return signbit(y) ? 1 : 0;
}

static int js_TA_cmp_int8(const void *a, const void *b, void *opaque) {
    return *(const int8_t *)a - *(const int8_t *)b;
}

static int js_TA_cmp_uint8(const void *a, const void *b, void *opaque) {
    return *(const uint8_t *)a - *(const uint8_t *)b;
}

static int js_TA_cmp_int16(const void *a, const void *b, void *opaque) {
    return *(const int16_t *)a - *(const int16_t *)b;
}

static int js_TA_cmp_uint16(const void *a, const void *b, void *opaque) {
    return *(const uint16_t *)a - *(const uint16_t *)b;
}

static int js_TA_cmp_int32(const void *a, const void *b, void *opaque) {
    int32_t x = *(const int32_t *)a;
    int32_t y = *(const int32_t *)b;
    return (y < x) - (y > x);
}

static int js_TA_cmp_uint32(const void *a, const void *b, void *opaque) {
    uint32_t x = *(const uint32_t *)a;
    uint32_t y = *(const uint32_t *)b;
    return (y < x) - (y > x);
}

#ifdef CONFIG_BIGNUM
static int js_TA_cmp_int64(const void *a, const void *b, void *opaque) {
    int64_t x = *(const int64_t *)a;
    int64_t y = *(const int64_t *)b;
    return (y < x) - (y > x);
}

static int js_TA_cmp_uint64(const void *a, const void *b, void *opaque) {
    uint64_t x = *(const uint64_t *)a;
    uint64_t y = *(const uint64_t *)b;
    return (y < x) - (y > x);
}
#endif

static int js_TA_cmp_float32(const void *a, const void *b, void *opaque) {
    return js_cmp_doubles(*(const float *)a, *(const float *)b);
}

static int js_TA_cmp_float64(const void *a, const void *b, void *opaque) {
    return js_cmp_doubles(*(const double *)a, *(const double *)b);
}

static JSValue js_TA_get_int8(JSContext *ctx, const void *a) {
    return JS_NewInt32(ctx, *(const int8_t *)a);
}

static JSValue js_TA_get_uint8(JSContext *ctx, const void *a) {
    return JS_NewInt32(ctx, *(const uint8_t *)a);
}

static JSValue js_TA_get_int16(JSContext *ctx, const void *a) {
    return JS_NewInt32(ctx, *(const int16_t *)a);
}

static JSValue js_TA_get_uint16(JSContext *ctx, const void *a) {
    return JS_NewInt32(ctx, *(const uint16_t *)a);
}

static JSValue js_TA_get_int32(JSContext *ctx, const void *a) {
    return JS_NewInt32(ctx, *(const int32_t *)a);
}

static JSValue js_TA_get_uint32(JSContext *ctx, const void *a) {
    return JS_NewUint32(ctx, *(const uint32_t *)a);
}

#ifdef CONFIG_BIGNUM
static JSValue js_TA_get_int64(JSContext *ctx, const void *a) {
    return JS_NewBigInt64(ctx, *(int64_t *)a);
}

static JSValue js_TA_get_uint64(JSContext *ctx, const void *a) {
    return JS_NewBigUint64(ctx, *(uint64_t *)a);
}
#endif

static JSValue js_TA_get_float32(JSContext *ctx, const void *a) {
    return __JS_NewFloat64(ctx, *(const float *)a);
}

static JSValue js_TA_get_float64(JSContext *ctx, const void *a) {
    return __JS_NewFloat64(ctx, *(const double *)a);
}

struct TA_sort_context {
    JSContext *ctx;
    int exception;
    JSValueConst arr;
    JSValueConst cmp;
    JSValue (*getfun)(JSContext *ctx, const void *a);
    uint8_t *array_ptr; /* cannot change unless the array is detached */
    int elt_size;
};

static int js_TA_cmp_generic(const void *a, const void *b, void *opaque) {
    auto psc = (struct TA_sort_context*) opaque;
    JSContext *ctx = psc->ctx;
    uint32_t a_idx, b_idx;
    JSValueConst argv[2];
    JSValue res;
    int cmp;

    cmp = 0;
    if (!psc->exception) {
        a_idx = *(uint32_t *)a;
        b_idx = *(uint32_t *)b;
        argv[0] = psc->getfun(ctx, psc->array_ptr +
                              a_idx * (size_t)psc->elt_size);
        argv[1] = psc->getfun(ctx, psc->array_ptr +
                              b_idx * (size_t)(psc->elt_size));
        res = JS_Call(ctx, psc->cmp, JS_UNDEFINED, 2, argv);
        if (JS_IsException(res)) {
            psc->exception = 1;
            goto done;
        }
        if (JS_VALUE_GET_TAG(res) == JS_TAG_INT) {
            int val = JS_VALUE_GET_INT(res);
            cmp = (val > 0) - (val < 0);
        } else {
            double val;
            if (JS_ToFloat64Free(ctx, &val, res) < 0) {
                psc->exception = 1;
                goto done;
            } else {
                cmp = (val > 0) - (val < 0);
            }
        }
        if (cmp == 0) {
            /* make sort stable: compare array offsets */
            cmp = (a_idx > b_idx) - (a_idx < b_idx);
        }
        if (validate_typed_array(ctx, psc->arr) < 0) {
            psc->exception = 1;
        }
    done:
        JS_FreeValue(ctx, (JSValue)argv[0]);
        JS_FreeValue(ctx, (JSValue)argv[1]);
    }
    return cmp;
}

static JSValue js_typed_array_sort(JSContext *ctx, JSValueConst this_val,
                                   int argc, JSValueConst *argv)
{
    JSObject *p;
    int len;
    size_t elt_size;
    struct TA_sort_context tsc;
    void *array_ptr;
    int (*cmpfun)(const void *a, const void *b, void *opaque);

    tsc.ctx = ctx;
    tsc.exception = 0;
    tsc.arr = this_val;
    tsc.cmp = argv[0];

    len = js_typed_array_get_length_internal(ctx, this_val);
    if (len < 0)
        return JS_EXCEPTION;
    if (!JS_IsUndefined(tsc.cmp) && check_function(ctx, tsc.cmp))
        return JS_EXCEPTION;

    if (len > 1) {
        p = JS_VALUE_GET_OBJ(this_val);
        switch (p->class_id) {
        case JS_CLASS_INT8_ARRAY:
            tsc.getfun = js_TA_get_int8;
            cmpfun = js_TA_cmp_int8;
            break;
        case JS_CLASS_UINT8C_ARRAY:
        case JS_CLASS_UINT8_ARRAY:
            tsc.getfun = js_TA_get_uint8;
            cmpfun = js_TA_cmp_uint8;
            break;
        case JS_CLASS_INT16_ARRAY:
            tsc.getfun = js_TA_get_int16;
            cmpfun = js_TA_cmp_int16;
            break;
        case JS_CLASS_UINT16_ARRAY:
            tsc.getfun = js_TA_get_uint16;
            cmpfun = js_TA_cmp_uint16;
            break;
        case JS_CLASS_INT32_ARRAY:
            tsc.getfun = js_TA_get_int32;
            cmpfun = js_TA_cmp_int32;
            break;
        case JS_CLASS_UINT32_ARRAY:
            tsc.getfun = js_TA_get_uint32;
            cmpfun = js_TA_cmp_uint32;
            break;
#ifdef CONFIG_BIGNUM
        case JS_CLASS_BIG_INT64_ARRAY:
            tsc.getfun = js_TA_get_int64;
            cmpfun = js_TA_cmp_int64;
            break;
        case JS_CLASS_BIG_UINT64_ARRAY:
            tsc.getfun = js_TA_get_uint64;
            cmpfun = js_TA_cmp_uint64;
            break;
#endif
        case JS_CLASS_FLOAT32_ARRAY:
            tsc.getfun = js_TA_get_float32;
            cmpfun = js_TA_cmp_float32;
            break;
        case JS_CLASS_FLOAT64_ARRAY:
            tsc.getfun = js_TA_get_float64;
            cmpfun = js_TA_cmp_float64;
            break;
        default:
            abort();
        }
        array_ptr = p->u.array.u.ptr;
        elt_size = 1 << typed_array_size_log2(p->class_id);
        if (!JS_IsUndefined(tsc.cmp)) {
            uint32_t *array_idx;
            void *array_tmp;
            size_t i, j;

            /* XXX: a stable sort would use less memory */
            array_idx = (uint32_t*) js_malloc(ctx, len * sizeof(array_idx[0]));
            if (!array_idx)
                return JS_EXCEPTION;
            for(i = 0; i < len; i++)
                array_idx[i] = i;
            tsc.array_ptr = (uint8_t*) array_ptr;
            tsc.elt_size = elt_size;
            rqsort(array_idx, len, sizeof(array_idx[0]),
                   js_TA_cmp_generic, &tsc);
            if (tsc.exception)
                goto fail;
            array_tmp = js_malloc(ctx, len * elt_size);
            if (!array_tmp) {
            fail:
                js_free(ctx, array_idx);
                return JS_EXCEPTION;
            }
            memcpy(array_tmp, array_ptr, len * elt_size);
            switch(elt_size) {
            case 1:
                for(i = 0; i < len; i++) {
                    j = array_idx[i];
                    ((uint8_t *)array_ptr)[i] = ((uint8_t *)array_tmp)[j];
                }
                break;
            case 2:
                for(i = 0; i < len; i++) {
                    j = array_idx[i];
                    ((uint16_t *)array_ptr)[i] = ((uint16_t *)array_tmp)[j];
                }
                break;
            case 4:
                for(i = 0; i < len; i++) {
                    j = array_idx[i];
                    ((uint32_t *)array_ptr)[i] = ((uint32_t *)array_tmp)[j];
                }
                break;
            case 8:
                for(i = 0; i < len; i++) {
                    j = array_idx[i];
                    ((uint64_t *)array_ptr)[i] = ((uint64_t *)array_tmp)[j];
                }
                break;
            default:
                abort();
            }
            js_free(ctx, array_tmp);
            js_free(ctx, array_idx);
        } else {
            rqsort(array_ptr, len, elt_size, cmpfun, &tsc);
            if (tsc.exception)
                return JS_EXCEPTION;
        }
    }
    return JS_DupValue(ctx, this_val);
}

static const JSCFunctionListEntry js_typed_array_base_funcs[] = {
    JS_CFUNC_DEF("from", 1, js_typed_array_from ),
    JS_CFUNC_DEF("of", 0, js_typed_array_of ),
    JS_CGETSET_DEF("[Symbol.species]", js_get_this, NULL ),
    //JS_CFUNC_DEF("__getLength", 2, js_typed_array___getLength ),
    //JS_CFUNC_DEF("__create", 2, js_typed_array___create ),
    //JS_CFUNC_DEF("__speciesCreate", 2, js_typed_array___speciesCreate ),
};

static const JSCFunctionListEntry js_typed_array_base_proto_funcs[] = {
    JS_CGETSET_DEF("length", js_typed_array_get_length, NULL ),
    JS_CGETSET_MAGIC_DEF("buffer", js_typed_array_get_buffer, NULL, 0 ),
    JS_CGETSET_MAGIC_DEF("byteLength", js_typed_array_get_byteLength, NULL, 0 ),
    JS_CGETSET_MAGIC_DEF("byteOffset", js_typed_array_get_byteOffset, NULL, 0 ),
    JS_CFUNC_DEF("set", 1, js_typed_array_set ),
    JS_CFUNC_MAGIC_DEF("values", 0, js_create_typed_array_iterator, JS_ITERATOR_KIND_VALUE ),
    JS_ALIAS_DEF("[Symbol.iterator]", "values" ),
    JS_CFUNC_MAGIC_DEF("keys", 0, js_create_typed_array_iterator, JS_ITERATOR_KIND_KEY ),
    JS_CFUNC_MAGIC_DEF("entries", 0, js_create_typed_array_iterator, JS_ITERATOR_KIND_KEY_AND_VALUE ),
    JS_CGETSET_DEF("[Symbol.toStringTag]", js_typed_array_get_toStringTag, NULL ),
    JS_CFUNC_DEF("copyWithin", 2, js_typed_array_copyWithin ),
    JS_CFUNC_MAGIC_DEF("every", 1, js_array_every, special_every | special_TA ),
    JS_CFUNC_MAGIC_DEF("some", 1, js_array_every, special_some | special_TA ),
    JS_CFUNC_MAGIC_DEF("forEach", 1, js_array_every, special_forEach | special_TA ),
    JS_CFUNC_MAGIC_DEF("map", 1, js_array_every, special_map | special_TA ),
    JS_CFUNC_MAGIC_DEF("filter", 1, js_array_every, special_filter | special_TA ),
    JS_CFUNC_MAGIC_DEF("reduce", 1, js_array_reduce, special_reduce | special_TA ),
    JS_CFUNC_MAGIC_DEF("reduceRight", 1, js_array_reduce, special_reduceRight | special_TA ),
    JS_CFUNC_DEF("fill", 1, js_typed_array_fill ),
    JS_CFUNC_MAGIC_DEF("find", 1, js_typed_array_find, 0 ),
    JS_CFUNC_MAGIC_DEF("findIndex", 1, js_typed_array_find, 1 ),
    JS_CFUNC_DEF("reverse", 0, js_typed_array_reverse ),
    JS_CFUNC_DEF("slice", 2, js_typed_array_slice ),
    JS_CFUNC_DEF("subarray", 2, js_typed_array_subarray ),
    JS_CFUNC_DEF("sort", 1, js_typed_array_sort ),
    JS_CFUNC_MAGIC_DEF("join", 1, js_typed_array_join, 0 ),
    JS_CFUNC_MAGIC_DEF("toLocaleString", 0, js_typed_array_join, 1 ),
    JS_CFUNC_MAGIC_DEF("indexOf", 1, js_typed_array_indexOf, special_indexOf ),
    JS_CFUNC_MAGIC_DEF("lastIndexOf", 1, js_typed_array_indexOf, special_lastIndexOf ),
    JS_CFUNC_MAGIC_DEF("includes", 1, js_typed_array_indexOf, special_includes ),
    //JS_ALIAS_BASE_DEF("toString", "toString", 2 /* Array.prototype. */), @@@
};

static JSValue js_typed_array_base_constructor(JSContext *ctx,
                                               JSValueConst this_val,
                                               int argc, JSValueConst *argv)
{
    return JS_ThrowTypeError(ctx, "cannot be called");
}

/* 'obj' must be an allocated typed array object */
static int typed_array_init(JSContext *ctx, JSValueConst obj,
                            JSValue buffer, uint64_t offset, uint64_t len)
{
    JSTypedArray *ta;
    JSObject *p, *pbuffer;
    JSArrayBuffer *abuf;
    int size_log2;

    p = JS_VALUE_GET_OBJ(obj);
    size_log2 = typed_array_size_log2(p->class_id);
    ta = (JSTypedArray*) js_malloc(ctx, sizeof(*ta));
    if (!ta) {
        JS_FreeValue(ctx, buffer);
        return -1;
    }
    pbuffer = JS_VALUE_GET_OBJ(buffer);
    abuf = pbuffer->u.array_buffer;
    ta->obj = p;
    ta->buffer = pbuffer;
    ta->offset = offset;
    ta->length = len << size_log2;
    list_add_tail(&ta->link, &abuf->array_list);
    p->u.typed_array = ta;
    p->u.array.count = len;
    p->u.array.u.ptr = abuf->data + offset;
    return 0;
}


static JSValue js_array_from_iterator(JSContext *ctx, uint32_t *plen,
                                      JSValueConst obj, JSValueConst method)
{
    JSValue arr, iter, next_method = JS_UNDEFINED, val;
    BOOL done;
    uint32_t k;

    *plen = 0;
    arr = JS_NewArray(ctx);
    if (JS_IsException(arr))
        return arr;
    iter = JS_GetIterator2(ctx, obj, method);
    if (JS_IsException(iter))
        goto fail;
    next_method = JS_GetProperty(ctx, iter, JS_ATOM_next);
    if (JS_IsException(next_method))
        goto fail;
    k = 0;
    for(;;) {
        val = JS_IteratorNext(ctx, iter, next_method, 0, NULL, &done);
        if (JS_IsException(val))
            goto fail;
        if (done) {
            JS_FreeValue(ctx, val);
            break;
        }
        if (JS_CreateDataPropertyUint32(ctx, arr, k, val, JS_PROP_THROW) < 0)
            goto fail;
        k++;
    }
    JS_FreeValue(ctx, next_method);
    JS_FreeValue(ctx, iter);
    *plen = k;
    return arr;
 fail:
    JS_FreeValue(ctx, next_method);
    JS_FreeValue(ctx, iter);
    JS_FreeValue(ctx, arr);
    return JS_EXCEPTION;
}

static JSValue js_typed_array_constructor_obj(JSContext *ctx,
                                              JSValueConst new_target,
                                              JSValueConst obj,
                                              int classid)
{
    JSValue iter, ret, arr = JS_UNDEFINED, val, buffer;
    uint32_t i;
    int size_log2;
    int64_t len;

    size_log2 = typed_array_size_log2(classid);
    ret = js_create_from_ctor(ctx, new_target, classid);
    if (JS_IsException(ret))
        return JS_EXCEPTION;

    iter = JS_GetProperty(ctx, obj, JS_ATOM_Symbol_iterator);
    if (JS_IsException(iter))
        goto fail;
    if (!JS_IsUndefined(iter) && !JS_IsNull(iter)) {
        uint32_t len1;
        arr = js_array_from_iterator(ctx, &len1, obj, iter);
        JS_FreeValue(ctx, iter);
        if (JS_IsException(arr))
            goto fail;
        len = len1;
    } else {
        if (js_get_length64(ctx, &len, obj))
            goto fail;
        arr = JS_DupValue(ctx, obj);
    }

    buffer = js_array_buffer_constructor1(ctx, JS_UNDEFINED,
                                          len << size_log2);
    if (JS_IsException(buffer))
        goto fail;
    if (typed_array_init(ctx, ret, buffer, 0, len))
        goto fail;

    for(i = 0; i < len; i++) {
        val = JS_GetPropertyUint32(ctx, arr, i);
        if (JS_IsException(val))
            goto fail;
        if (JS_SetPropertyUint32(ctx, ret, i, val) < 0)
            goto fail;
    }
    JS_FreeValue(ctx, arr);
    return ret;
 fail:
    JS_FreeValue(ctx, arr);
    JS_FreeValue(ctx, ret);
    return JS_EXCEPTION;
}

static JSValue js_typed_array_constructor_ta(JSContext *ctx,
                                             JSValueConst new_target,
                                             JSValueConst src_obj,
                                             int classid)
{
    JSObject *p, *src_buffer;
    JSTypedArray *ta;
    JSValue ctor, obj, buffer;
    uint32_t len, i;
    int size_log2;
    JSArrayBuffer *src_abuf, *abuf;

    obj = js_create_from_ctor(ctx, new_target, classid);
    if (JS_IsException(obj))
        return obj;
    p = JS_VALUE_GET_OBJ(src_obj);
    if (typed_array_is_detached(ctx, p)) {
        JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        goto fail;
    }
    ta = p->u.typed_array;
    len = p->u.array.count;
    src_buffer = ta->buffer;
    src_abuf = src_buffer->u.array_buffer;
    if (!src_abuf->shared) {
        ctor = JS_SpeciesConstructor(ctx, JS_MKPTR(JS_TAG_OBJECT, src_buffer),
                                     JS_UNDEFINED);
        if (JS_IsException(ctor))
            goto fail;
    } else {
        /* force ArrayBuffer default constructor */
        ctor = JS_UNDEFINED;
    }
    size_log2 = typed_array_size_log2(classid);
    buffer = js_array_buffer_constructor1(ctx, ctor,
                                          (uint64_t)len << size_log2);
    JS_FreeValue(ctx, ctor);
    if (JS_IsException(buffer))
        goto fail;
    /* necessary because it could have been detached */
    if (typed_array_is_detached(ctx, p)) {
        JS_FreeValue(ctx, buffer);
        JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        goto fail;
    }
    abuf = (JSArrayBuffer*) JS_GetOpaque(buffer, JS_CLASS_ARRAY_BUFFER);
    if (typed_array_init(ctx, obj, buffer, 0, len))
        goto fail;
    if (p->class_id == classid) {
        /* same type: copy the content */
        memcpy(abuf->data, src_abuf->data + ta->offset, abuf->byte_length);
    } else {
        for(i = 0; i < len; i++) {
            JSValue val;
            val = JS_GetPropertyUint32(ctx, src_obj, i);
            if (JS_IsException(val))
                goto fail;
            if (JS_SetPropertyUint32(ctx, obj, i, val) < 0)
                goto fail;
        }
    }
    return obj;
 fail:
    JS_FreeValue(ctx, obj);
    return JS_EXCEPTION;
}

static JSValue js_typed_array_constructor(JSContext *ctx,
                                          JSValueConst new_target,
                                          int argc, JSValueConst *argv,
                                          int classid)
{
    JSValue buffer, obj;
    JSArrayBuffer *abuf;
    int size_log2;
    uint64_t len, offset;

    size_log2 = typed_array_size_log2(classid);
    if (JS_VALUE_GET_TAG(argv[0]) != JS_TAG_OBJECT) {
        if (JS_ToIndex(ctx, &len, argv[0]))
            return JS_EXCEPTION;
        buffer = js_array_buffer_constructor1(ctx, JS_UNDEFINED,
                                              len << size_log2);
        if (JS_IsException(buffer))
            return JS_EXCEPTION;
        offset = 0;
    } else {
        JSObject *p = JS_VALUE_GET_OBJ(argv[0]);
        if (p->class_id == JS_CLASS_ARRAY_BUFFER ||
            p->class_id == JS_CLASS_SHARED_ARRAY_BUFFER) {
            abuf = p->u.array_buffer;
            if (JS_ToIndex(ctx, &offset, argv[1]))
                return JS_EXCEPTION;
            if (abuf->detached)
                return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
            if ((offset & ((1 << size_log2) - 1)) != 0 ||
                offset > abuf->byte_length)
                return JS_ThrowRangeError(ctx, "invalid offset");
            if (JS_IsUndefined(argv[2])) {
                if ((abuf->byte_length & ((1 << size_log2) - 1)) != 0)
                    goto invalid_length;
                len = (abuf->byte_length - offset) >> size_log2;
            } else {
                if (JS_ToIndex(ctx, &len, argv[2]))
                    return JS_EXCEPTION;
                if (abuf->detached)
                    return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
                if ((offset + (len << size_log2)) > abuf->byte_length) {
                invalid_length:
                    return JS_ThrowRangeError(ctx, "invalid length");
                }
            }
            buffer = JS_DupValue(ctx, argv[0]);
        } else {
            if (p->class_id >= JS_CLASS_UINT8C_ARRAY &&
                p->class_id <= JS_CLASS_FLOAT64_ARRAY) {
                return js_typed_array_constructor_ta(ctx, new_target, argv[0], classid);
            } else {
                return js_typed_array_constructor_obj(ctx, new_target, argv[0], classid);
            }
        }
    }

    obj = js_create_from_ctor(ctx, new_target, classid);
    if (JS_IsException(obj)) {
        JS_FreeValue(ctx, buffer);
        return JS_EXCEPTION;
    }
    if (typed_array_init(ctx, obj, buffer, offset, len)) {
        JS_FreeValue(ctx, obj);
        return JS_EXCEPTION;
    }
    return obj;
}

static void js_typed_array_finalizer(JSRuntime *rt, JSValue val)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSTypedArray *ta = p->u.typed_array;
    if (ta) {
        /* during the GC the finalizers are called in an arbitrary
           order so the ArrayBuffer finalizer may have been called */
        if (JS_IsLiveObject(rt, JS_MKPTR(JS_TAG_OBJECT, ta->buffer))) {
            list_del(&ta->link);
        }
        JS_FreeValueRT(rt, JS_MKPTR(JS_TAG_OBJECT, ta->buffer));
        js_free_rt(rt, ta);
    }
}

static void js_typed_array_mark(JSRuntime *rt, JSValueConst val,
                                JS_MarkFunc *mark_func)
{
    JSObject *p = JS_VALUE_GET_OBJ(val);
    JSTypedArray *ta = p->u.typed_array;
    if (ta) {
        JS_MarkValue(rt, JS_MKPTR(JS_TAG_OBJECT, ta->buffer), mark_func);
    }
}

static JSValue js_dataview_constructor(JSContext *ctx,
                                       JSValueConst new_target,
                                       int argc, JSValueConst *argv)
{
    JSArrayBuffer *abuf;
    uint64_t offset;
    uint32_t len;
    JSValueConst buffer;
    JSValue obj;
    JSTypedArray *ta;
    JSObject *p;

    buffer = argv[0];
    abuf = js_get_array_buffer(ctx, buffer);
    if (!abuf)
        return JS_EXCEPTION;
    offset = 0;
    if (argc > 1) {
        if (JS_ToIndex(ctx, &offset, argv[1]))
            return JS_EXCEPTION;
    }
    if (abuf->detached)
        return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
    if (offset > abuf->byte_length)
        return JS_ThrowRangeError(ctx, "invalid byteOffset");
    len = abuf->byte_length - offset;
    if (argc > 2 && !JS_IsUndefined(argv[2])) {
        uint64_t l;
        if (JS_ToIndex(ctx, &l, argv[2]))
            return JS_EXCEPTION;
        if (l > len)
            return JS_ThrowRangeError(ctx, "invalid byteLength");
        len = l;
    }

    obj = js_create_from_ctor(ctx, new_target, JS_CLASS_DATAVIEW);
    if (JS_IsException(obj))
        return JS_EXCEPTION;
    if (abuf->detached) {
        /* could have been detached in js_create_from_ctor() */
        JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        goto fail;
    }
    ta = (JSTypedArray*) js_malloc(ctx, sizeof(*ta));
    if (!ta) {
    fail:
        JS_FreeValue(ctx, obj);
        return JS_EXCEPTION;
    }
    p = JS_VALUE_GET_OBJ(obj);
    ta->obj = p;
    ta->buffer = JS_VALUE_GET_OBJ(JS_DupValue(ctx, buffer));
    ta->offset = offset;
    ta->length = len;
    list_add_tail(&ta->link, &abuf->array_list);
    p->u.typed_array = ta;
    return obj;
}

static JSValue js_dataview_getValue(JSContext *ctx,
                                    JSValueConst this_obj,
                                    int argc, JSValueConst *argv, int class_id)
{
    JSTypedArray *ta;
    JSArrayBuffer *abuf;
    int is_swap, size;
    uint8_t *ptr;
    uint32_t v;
    uint64_t pos;

    ta = (JSTypedArray*) JS_GetOpaque2(ctx, this_obj, JS_CLASS_DATAVIEW);
    if (!ta)
        return JS_EXCEPTION;
    size = 1 << typed_array_size_log2(class_id);
    if (JS_ToIndex(ctx, &pos, argv[0]))
        return JS_EXCEPTION;
    is_swap = FALSE;
    if (argc > 1)
        is_swap = JS_ToBool(ctx, argv[1]);
#if ! CHOC_BIGENDIAN
    is_swap ^= 1;
#endif
    abuf = ta->buffer->u.array_buffer;
    if (abuf->detached)
        return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
    if ((pos + size) > ta->length)
        return JS_ThrowRangeError(ctx, "out of bound");
    ptr = abuf->data + ta->offset + pos;

    switch(class_id) {
    case JS_CLASS_INT8_ARRAY:
        return JS_NewInt32(ctx, *(int8_t *)ptr);
    case JS_CLASS_UINT8_ARRAY:
        return JS_NewInt32(ctx, *(uint8_t *)ptr);
    case JS_CLASS_INT16_ARRAY:
        v = get_u16(ptr);
        if (is_swap)
            v = bswap16(v);
        return JS_NewInt32(ctx, (int16_t)v);
    case JS_CLASS_UINT16_ARRAY:
        v = get_u16(ptr);
        if (is_swap)
            v = bswap16(v);
        return JS_NewInt32(ctx, v);
    case JS_CLASS_INT32_ARRAY:
        v = get_u32(ptr);
        if (is_swap)
            v = bswap32(v);
        return JS_NewInt32(ctx, v);
    case JS_CLASS_UINT32_ARRAY:
        v = get_u32(ptr);
        if (is_swap)
            v = bswap32(v);
        return JS_NewUint32(ctx, v);
#ifdef CONFIG_BIGNUM
    case JS_CLASS_BIG_INT64_ARRAY:
        {
            uint64_t v;
            v = get_u64(ptr);
            if (is_swap)
                v = bswap64(v);
            return JS_NewBigInt64(ctx, v);
        }
        break;
    case JS_CLASS_BIG_UINT64_ARRAY:
        {
            uint64_t v;
            v = get_u64(ptr);
            if (is_swap)
                v = bswap64(v);
            return JS_NewBigUint64(ctx, v);
        }
        break;
#endif
    case JS_CLASS_FLOAT32_ARRAY:
        {
            union {
                float f;
                uint32_t i;
            } u;
            v = get_u32(ptr);
            if (is_swap)
                v = bswap32(v);
            u.i = v;
            return __JS_NewFloat64(ctx, u.f);
        }
    case JS_CLASS_FLOAT64_ARRAY:
        {
            union {
                double f;
                uint64_t i;
            } u;
            u.i = get_u64(ptr);
            if (is_swap)
                u.i = bswap64(u.i);
            return __JS_NewFloat64(ctx, u.f);
        }
    default:
        abort();
    }
}

static JSValue js_dataview_setValue(JSContext *ctx,
                                    JSValueConst this_obj,
                                    int argc, JSValueConst *argv, int class_id)
{
    JSTypedArray *ta;
    JSArrayBuffer *abuf;
    int is_swap, size;
    uint8_t *ptr;
    uint64_t v64;
    uint32_t v;
    uint64_t pos;
    JSValueConst val;

    ta = (JSTypedArray*) JS_GetOpaque2(ctx, this_obj, JS_CLASS_DATAVIEW);
    if (!ta)
        return JS_EXCEPTION;
    size = 1 << typed_array_size_log2(class_id);
    if (JS_ToIndex(ctx, &pos, argv[0]))
        return JS_EXCEPTION;
    val = argv[1];
    v = 0; /* avoid warning */
    v64 = 0; /* avoid warning */
    if (class_id <= JS_CLASS_UINT32_ARRAY) {
        if (JS_ToUint32(ctx, &v, val))
            return JS_EXCEPTION;
    } else
#ifdef CONFIG_BIGNUM
    if (class_id <= JS_CLASS_BIG_UINT64_ARRAY) {
        if (JS_ToBigInt64(ctx, (int64_t *)&v64, val))
            return JS_EXCEPTION;
    } else
#endif
    {
        double d;
        if (JS_ToFloat64(ctx, &d, val))
            return JS_EXCEPTION;
        if (class_id == JS_CLASS_FLOAT32_ARRAY) {
            union {
                float f;
                uint32_t i;
            } u;
            u.f = d;
            v = u.i;
        } else {
            JSFloat64Union u;
            u.d = d;
            v64 = u.u64;
        }
    }
    is_swap = FALSE;
    if (argc > 2)
        is_swap = JS_ToBool(ctx, argv[2]);
#if ! CHOC_BIGENDIAN
    is_swap ^= 1;
#endif
    abuf = ta->buffer->u.array_buffer;
    if (abuf->detached)
        return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
    if ((pos + size) > ta->length)
        return JS_ThrowRangeError(ctx, "out of bound");
    ptr = abuf->data + ta->offset + pos;

    switch(class_id) {
    case JS_CLASS_INT8_ARRAY:
    case JS_CLASS_UINT8_ARRAY:
        *ptr = v;
        break;
    case JS_CLASS_INT16_ARRAY:
    case JS_CLASS_UINT16_ARRAY:
        if (is_swap)
            v = bswap16(v);
        put_u16(ptr, v);
        break;
    case JS_CLASS_INT32_ARRAY:
    case JS_CLASS_UINT32_ARRAY:
    case JS_CLASS_FLOAT32_ARRAY:
        if (is_swap)
            v = bswap32(v);
        put_u32(ptr, v);
        break;
#ifdef CONFIG_BIGNUM
    case JS_CLASS_BIG_INT64_ARRAY:
    case JS_CLASS_BIG_UINT64_ARRAY:
#endif
    case JS_CLASS_FLOAT64_ARRAY:
        if (is_swap)
            v64 = bswap64(v64);
        put_u64(ptr, v64);
        break;
    default:
        abort();
    }
    return JS_UNDEFINED;
}

static const JSCFunctionListEntry js_dataview_proto_funcs[] = {
    JS_CGETSET_MAGIC_DEF("buffer", js_typed_array_get_buffer, NULL, 1 ),
    JS_CGETSET_MAGIC_DEF("byteLength", js_typed_array_get_byteLength, NULL, 1 ),
    JS_CGETSET_MAGIC_DEF("byteOffset", js_typed_array_get_byteOffset, NULL, 1 ),
    JS_CFUNC_MAGIC_DEF("getInt8", 1, js_dataview_getValue, JS_CLASS_INT8_ARRAY ),
    JS_CFUNC_MAGIC_DEF("getUint8", 1, js_dataview_getValue, JS_CLASS_UINT8_ARRAY ),
    JS_CFUNC_MAGIC_DEF("getInt16", 1, js_dataview_getValue, JS_CLASS_INT16_ARRAY ),
    JS_CFUNC_MAGIC_DEF("getUint16", 1, js_dataview_getValue, JS_CLASS_UINT16_ARRAY ),
    JS_CFUNC_MAGIC_DEF("getInt32", 1, js_dataview_getValue, JS_CLASS_INT32_ARRAY ),
    JS_CFUNC_MAGIC_DEF("getUint32", 1, js_dataview_getValue, JS_CLASS_UINT32_ARRAY ),
#ifdef CONFIG_BIGNUM
    JS_CFUNC_MAGIC_DEF("getBigInt64", 1, js_dataview_getValue, JS_CLASS_BIG_INT64_ARRAY ),
    JS_CFUNC_MAGIC_DEF("getBigUint64", 1, js_dataview_getValue, JS_CLASS_BIG_UINT64_ARRAY ),
#endif
    JS_CFUNC_MAGIC_DEF("getFloat32", 1, js_dataview_getValue, JS_CLASS_FLOAT32_ARRAY ),
    JS_CFUNC_MAGIC_DEF("getFloat64", 1, js_dataview_getValue, JS_CLASS_FLOAT64_ARRAY ),
    JS_CFUNC_MAGIC_DEF("setInt8", 2, js_dataview_setValue, JS_CLASS_INT8_ARRAY ),
    JS_CFUNC_MAGIC_DEF("setUint8", 2, js_dataview_setValue, JS_CLASS_UINT8_ARRAY ),
    JS_CFUNC_MAGIC_DEF("setInt16", 2, js_dataview_setValue, JS_CLASS_INT16_ARRAY ),
    JS_CFUNC_MAGIC_DEF("setUint16", 2, js_dataview_setValue, JS_CLASS_UINT16_ARRAY ),
    JS_CFUNC_MAGIC_DEF("setInt32", 2, js_dataview_setValue, JS_CLASS_INT32_ARRAY ),
    JS_CFUNC_MAGIC_DEF("setUint32", 2, js_dataview_setValue, JS_CLASS_UINT32_ARRAY ),
#ifdef CONFIG_BIGNUM
    JS_CFUNC_MAGIC_DEF("setBigInt64", 2, js_dataview_setValue, JS_CLASS_BIG_INT64_ARRAY ),
    JS_CFUNC_MAGIC_DEF("setBigUint64", 2, js_dataview_setValue, JS_CLASS_BIG_UINT64_ARRAY ),
#endif
    JS_CFUNC_MAGIC_DEF("setFloat32", 2, js_dataview_setValue, JS_CLASS_FLOAT32_ARRAY ),
    JS_CFUNC_MAGIC_DEF("setFloat64", 2, js_dataview_setValue, JS_CLASS_FLOAT64_ARRAY ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "DataView", JS_PROP_CONFIGURABLE ),
};

/* Atomics */
#ifdef CONFIG_ATOMICS

typedef enum AtomicsOpEnum {
    ATOMICS_OP_ADD,
    ATOMICS_OP_AND,
    ATOMICS_OP_OR,
    ATOMICS_OP_SUB,
    ATOMICS_OP_XOR,
    ATOMICS_OP_EXCHANGE,
    ATOMICS_OP_COMPARE_EXCHANGE,
    ATOMICS_OP_LOAD,
} AtomicsOpEnum;

static void *js_atomics_get_ptr(JSContext *ctx,
                                JSArrayBuffer **pabuf,
                                int *psize_log2, JSClassID *pclass_id,
                                JSValueConst obj, JSValueConst idx_val,
                                int is_waitable)
{
    JSObject *p;
    JSTypedArray *ta;
    JSArrayBuffer *abuf;
    void *ptr;
    uint64_t idx;
    BOOL err;
    int size_log2;

    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        goto fail;
    p = JS_VALUE_GET_OBJ(obj);
#ifdef CONFIG_BIGNUM
    if (is_waitable)
        err = (p->class_id != JS_CLASS_INT32_ARRAY &&
               p->class_id != JS_CLASS_BIG_INT64_ARRAY);
    else
        err = !(p->class_id >= JS_CLASS_INT8_ARRAY &&
                p->class_id <= JS_CLASS_BIG_UINT64_ARRAY);
#else
    if (is_waitable)
        err = (p->class_id != JS_CLASS_INT32_ARRAY);
    else
        err = !(p->class_id >= JS_CLASS_INT8_ARRAY &&
                p->class_id <= JS_CLASS_UINT32_ARRAY);
#endif
    if (err) {
    fail:
        JS_ThrowTypeError(ctx, "integer TypedArray expected");
        return NULL;
    }
    ta = p->u.typed_array;
    abuf = ta->buffer->u.array_buffer;
    if (!abuf->shared) {
        if (is_waitable == 2) {
            JS_ThrowTypeError(ctx, "not a SharedArrayBuffer TypedArray");
            return NULL;
        }
        if (abuf->detached) {
            JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
            return NULL;
        }
    }
    if (JS_ToIndex(ctx, &idx, idx_val)) {
        return NULL;
    }
    /* if the array buffer is detached, p->u.array.count = 0 */
    if (idx >= p->u.array.count) {
        JS_ThrowRangeError(ctx, "out-of-bound access");
        return NULL;
    }
    size_log2 = typed_array_size_log2(p->class_id);
    ptr = p->u.array.u.uint8_ptr + ((uintptr_t)idx << size_log2);
    if (pabuf)
        *pabuf = abuf;
    if (psize_log2)
        *psize_log2 = size_log2;
    if (pclass_id)
        *pclass_id = p->class_id;
    return ptr;
}

static JSValue js_atomics_op(JSContext *ctx,
                             JSValueConst this_obj,
                             int argc, JSValueConst *argv, int op)
{
    int size_log2;
#ifdef CONFIG_BIGNUM
    uint64_t v, a, rep_val;
#else
    uint32_t v, a, rep_val;
#endif
    void *ptr;
    JSValue ret;
    JSClassID class_id;
    JSArrayBuffer *abuf;

    ptr = js_atomics_get_ptr(ctx, &abuf, &size_log2, &class_id,
                             argv[0], argv[1], 0);
    if (!ptr)
        return JS_EXCEPTION;
    rep_val = 0;
    if (op == ATOMICS_OP_LOAD) {
        v = 0;
    } else {
#ifdef CONFIG_BIGNUM
        if (size_log2 == 3) {
            int64_t v64;
            if (JS_ToBigInt64(ctx, &v64, argv[2]))
                return JS_EXCEPTION;
            v = v64;
            if (op == ATOMICS_OP_COMPARE_EXCHANGE) {
                if (JS_ToBigInt64(ctx, &v64, argv[3]))
                    return JS_EXCEPTION;
                rep_val = v64;
            }
        } else
#endif
        {
                uint32_t v32;
                if (JS_ToUint32(ctx, &v32, argv[2]))
                    return JS_EXCEPTION;
                v = v32;
                if (op == ATOMICS_OP_COMPARE_EXCHANGE) {
                    if (JS_ToUint32(ctx, &v32, argv[3]))
                        return JS_EXCEPTION;
                    rep_val = v32;
                }
        }
        if (abuf->detached)
            return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
   }

   switch(op | (size_log2 << 3)) {

#ifdef CONFIG_BIGNUM
#define OP(op_name, func_name)                          \
    case ATOMICS_OP_ ## op_name | (0 << 3):             \
       a = func_name((_Atomic(uint8_t) *)ptr, v);       \
       break;                                           \
    case ATOMICS_OP_ ## op_name | (1 << 3):             \
        a = func_name((_Atomic(uint16_t) *)ptr, v);     \
        break;                                          \
    case ATOMICS_OP_ ## op_name | (2 << 3):             \
        a = func_name((_Atomic(uint32_t) *)ptr, v);     \
        break;                                          \
    case ATOMICS_OP_ ## op_name | (3 << 3):             \
        a = func_name((_Atomic(uint64_t) *)ptr, v);     \
        break;
#else
#define OP(op_name, func_name)                          \
    case ATOMICS_OP_ ## op_name | (0 << 3):             \
       a = func_name((std::atomic<uint8_t>*) ptr, v);       \
       break;                                           \
    case ATOMICS_OP_ ## op_name | (1 << 3):             \
        a = func_name((std::atomic<uint16_t>*) ptr, v);     \
        break;                                          \
    case ATOMICS_OP_ ## op_name | (2 << 3):             \
        a = func_name((std::atomic<uint32_t>*) ptr, v);     \
        break;
#endif
        OP(ADD, atomic_fetch_add)
        OP(AND, atomic_fetch_and)
        OP(OR, atomic_fetch_or)
        OP(SUB, atomic_fetch_sub)
        OP(XOR, atomic_fetch_xor)
        OP(EXCHANGE, atomic_exchange)
#undef OP

    case ATOMICS_OP_LOAD | (0 << 3):
        a = atomic_load((std::atomic<uint8_t>*) ptr);
        break;
    case ATOMICS_OP_LOAD | (1 << 3):
        a = atomic_load((std::atomic<uint16_t>*) ptr);
        break;
    case ATOMICS_OP_LOAD | (2 << 3):
        a = atomic_load((std::atomic<uint32_t>*) ptr);
        break;
#ifdef CONFIG_BIGNUM
    case ATOMICS_OP_LOAD | (3 << 3):
        a = atomic_load((_Atomic(uint64_t) *)ptr);
        break;
#endif

    case ATOMICS_OP_COMPARE_EXCHANGE | (0 << 3):
        {
            uint8_t v1 = v;
            atomic_compare_exchange_strong ((std::atomic<uint8_t>*) ptr, &v1, rep_val);
            a = v1;
        }
        break;
    case ATOMICS_OP_COMPARE_EXCHANGE | (1 << 3):
        {
            uint16_t v1 = v;
            atomic_compare_exchange_strong((std::atomic<uint16_t>*) ptr, &v1, rep_val);
            a = v1;
        }
        break;
    case ATOMICS_OP_COMPARE_EXCHANGE | (2 << 3):
        {
            uint32_t v1 = v;
            atomic_compare_exchange_strong((std::atomic<uint32_t>*) ptr, &v1, rep_val);
            a = v1;
        }
        break;
#ifdef CONFIG_BIGNUM
    case ATOMICS_OP_COMPARE_EXCHANGE | (3 << 3):
        {
            uint64_t v1 = v;
            atomic_compare_exchange_strong((std::atomic<uint64_t>*) ptr, &v1, rep_val);
            a = v1;
        }
        break;
#endif
    default:
        abort();
    }

    switch(class_id) {
    case JS_CLASS_INT8_ARRAY:
        a = (int8_t)a;
        goto done;
    case JS_CLASS_UINT8_ARRAY:
        a = (uint8_t)a;
        goto done;
    case JS_CLASS_INT16_ARRAY:
        a = (int16_t)a;
        goto done;
    case JS_CLASS_UINT16_ARRAY:
        a = (uint16_t)a;
        goto done;
    case JS_CLASS_INT32_ARRAY:
    done:
        ret = JS_NewInt32(ctx, a);
        break;
    case JS_CLASS_UINT32_ARRAY:
        ret = JS_NewUint32(ctx, a);
        break;
#ifdef CONFIG_BIGNUM
    case JS_CLASS_BIG_INT64_ARRAY:
        ret = JS_NewBigInt64(ctx, a);
        break;
    case JS_CLASS_BIG_UINT64_ARRAY:
        ret = JS_NewBigUint64(ctx, a);
        break;
#endif
    default:
        abort();
    }
    return ret;
}

static JSValue js_atomics_store(JSContext *ctx,
                                JSValueConst this_obj,
                                int argc, JSValueConst *argv)
{
    int size_log2;
    void *ptr;
    JSValue ret;
    JSArrayBuffer *abuf;

    ptr = js_atomics_get_ptr(ctx, &abuf, &size_log2, NULL,
                             argv[0], argv[1], 0);
    if (!ptr)
        return JS_EXCEPTION;
#ifdef CONFIG_BIGNUM
    if (size_log2 == 3) {
        int64_t v64;
        ret = JS_ToBigIntValueFree(ctx, JS_DupValue(ctx, argv[2]));
        if (JS_IsException(ret))
            return ret;
        if (JS_ToBigInt64(ctx, &v64, ret)) {
            JS_FreeValue(ctx, ret);
            return JS_EXCEPTION;
        }
        if (abuf->detached)
            return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        atomic_store((_Atomic(uint64_t) *)ptr, v64);
    } else
#endif
    {
        uint32_t v;
        /* XXX: spec, would be simpler to return the written value */
        ret = JS_ToIntegerFree(ctx, JS_DupValue(ctx, argv[2]));
        if (JS_IsException(ret))
            return ret;
        if (JS_ToUint32(ctx, &v, ret)) {
            JS_FreeValue(ctx, ret);
            return JS_EXCEPTION;
        }
        if (abuf->detached)
            return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
        switch(size_log2) {
        case 0:
            atomic_store((std::atomic<uint8_t>*) ptr, v);
            break;
        case 1:
            atomic_store((std::atomic<uint16_t>*) ptr, v);
            break;
        case 2:
            atomic_store((std::atomic<uint32_t>*) ptr, v);
            break;
        default:
            abort();
        }
    }
    return ret;
}

static JSValue js_atomics_isLockFree(JSContext *ctx,
                                     JSValueConst this_obj,
                                     int argc, JSValueConst *argv)
{
    int v, ret;
    if (JS_ToInt32Sat(ctx, &v, argv[0]))
        return JS_EXCEPTION;
    ret = (v == 1 || v == 2 || v == 4
#ifdef CONFIG_BIGNUM
           || v == 8
#endif
           );
    return JS_NewBool(ctx, ret);
}

typedef struct JSAtomicsWaiter {
    struct list_head link;
    BOOL linked;
    pthread_cond_t cond;
    int32_t *ptr;
} JSAtomicsWaiter;

static pthread_mutex_t js_atomics_mutex = PTHREAD_MUTEX_INITIALIZER;
static struct list_head js_atomics_waiter_list =
    LIST_HEAD_INIT(js_atomics_waiter_list);

static JSValue js_atomics_wait(JSContext *ctx,
                               JSValueConst this_obj,
                               int argc, JSValueConst *argv)
{
    int64_t v;
    int32_t v32;
    void *ptr;
    int64_t timeout;
    struct timespec ts;
    JSAtomicsWaiter waiter_s, *waiter;
    int ret, size_log2, res;
    double d;

    ptr = js_atomics_get_ptr(ctx, NULL, &size_log2, NULL,
                             argv[0], argv[1], 2);
    if (!ptr)
        return JS_EXCEPTION;
#ifdef CONFIG_BIGNUM
    if (size_log2 == 3) {
        if (JS_ToBigInt64(ctx, &v, argv[2]))
            return JS_EXCEPTION;
    } else
#endif
    {
        if (JS_ToInt32(ctx, &v32, argv[2]))
            return JS_EXCEPTION;
        v = v32;
    }
    if (JS_ToFloat64(ctx, &d, argv[3]))
        return JS_EXCEPTION;
    if (isnan(d) || d > INT64_MAX)
        timeout = INT64_MAX;
    else if (d < 0)
        timeout = 0;
    else
        timeout = (int64_t)d;
    if (!ctx->rt->can_block)
        return JS_ThrowTypeError(ctx, "cannot block in this thread");

    /* XXX: inefficient if large number of waiters, should hash on
       'ptr' value */
    /* XXX: use Linux futexes when available ? */
    pthread_mutex_lock(&js_atomics_mutex);
    if (size_log2 == 3) {
        res = *(int64_t *)ptr != v;
    } else {
        res = *(int32_t *)ptr != v;
    }
    if (res) {
        pthread_mutex_unlock(&js_atomics_mutex);
        return JS_AtomToString(ctx, JS_ATOM_not_equal);
    }

    waiter = &waiter_s;
    waiter->ptr = (int32_t*) ptr;
    pthread_cond_init(&waiter->cond, NULL);
    waiter->linked = TRUE;
    list_add_tail(&waiter->link, &js_atomics_waiter_list);

    if (timeout == INT64_MAX) {
        pthread_cond_wait(&waiter->cond, &js_atomics_mutex);
        ret = 0;
    } else {
        /* XXX: use clock monotonic */
        clock_gettime(CLOCK_REALTIME, &ts);
        ts.tv_sec += timeout / 1000;
        ts.tv_nsec += (timeout % 1000) * 1000000;
        if (ts.tv_nsec >= 1000000000) {
            ts.tv_nsec -= 1000000000;
            ts.tv_sec++;
        }
        ret = pthread_cond_timedwait(&waiter->cond, &js_atomics_mutex,
                                     &ts);
    }
    if (waiter->linked)
        list_del(&waiter->link);
    pthread_mutex_unlock(&js_atomics_mutex);
    pthread_cond_destroy(&waiter->cond);
    if (ret == ETIMEDOUT) {
        return JS_AtomToString(ctx, JS_ATOM_timed_out);
    } else {
        return JS_AtomToString(ctx, JS_ATOM_ok);
    }
}

static JSValue js_atomics_notify(JSContext *ctx,
                                 JSValueConst this_obj,
                                 int argc, JSValueConst *argv)
{
    struct list_head *el, *el1, waiter_list;
    int32_t count, n;
    void *ptr;
    JSAtomicsWaiter *waiter;
    JSArrayBuffer *abuf;

    ptr = js_atomics_get_ptr(ctx, &abuf, NULL, NULL, argv[0], argv[1], 1);
    if (!ptr)
        return JS_EXCEPTION;

    if (JS_IsUndefined(argv[2])) {
        count = INT32_MAX;
    } else {
        if (JS_ToInt32Clamp(ctx, &count, argv[2], 0, INT32_MAX, 0))
            return JS_EXCEPTION;
    }
    if (abuf->detached)
        return JS_ThrowTypeErrorDetachedArrayBuffer(ctx);

    n = 0;
    if (abuf->shared && count > 0) {
        pthread_mutex_lock(&js_atomics_mutex);
        init_list_head(&waiter_list);
        list_for_each_safe(el, el1, &js_atomics_waiter_list) {
            waiter = list_entry(el, JSAtomicsWaiter, link);
            if (waiter->ptr == ptr) {
                list_del(&waiter->link);
                waiter->linked = FALSE;
                list_add_tail(&waiter->link, &waiter_list);
                n++;
                if (n >= count)
                    break;
            }
        }
        list_for_each(el, &waiter_list) {
            waiter = list_entry(el, JSAtomicsWaiter, link);
            pthread_cond_signal(&waiter->cond);
        }
        pthread_mutex_unlock(&js_atomics_mutex);
    }
    return JS_NewInt32(ctx, n);
}

static const JSCFunctionListEntry js_atomics_funcs[] = {
    JS_CFUNC_MAGIC_DEF("add", 3, js_atomics_op, ATOMICS_OP_ADD ),
    JS_CFUNC_MAGIC_DEF("and", 3, js_atomics_op, ATOMICS_OP_AND ),
    JS_CFUNC_MAGIC_DEF("or", 3, js_atomics_op, ATOMICS_OP_OR ),
    JS_CFUNC_MAGIC_DEF("sub", 3, js_atomics_op, ATOMICS_OP_SUB ),
    JS_CFUNC_MAGIC_DEF("xor", 3, js_atomics_op, ATOMICS_OP_XOR ),
    JS_CFUNC_MAGIC_DEF("exchange", 3, js_atomics_op, ATOMICS_OP_EXCHANGE ),
    JS_CFUNC_MAGIC_DEF("compareExchange", 4, js_atomics_op, ATOMICS_OP_COMPARE_EXCHANGE ),
    JS_CFUNC_MAGIC_DEF("load", 2, js_atomics_op, ATOMICS_OP_LOAD ),
    JS_CFUNC_DEF("store", 3, js_atomics_store ),
    JS_CFUNC_DEF("isLockFree", 1, js_atomics_isLockFree ),
    JS_CFUNC_DEF("wait", 4, js_atomics_wait ),
    JS_CFUNC_DEF("notify", 3, js_atomics_notify ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "Atomics", JS_PROP_CONFIGURABLE ),
};

static const JSCFunctionListEntry js_atomics_obj[] = {
    JS_OBJECT_DEF("Atomics", js_atomics_funcs, countof(js_atomics_funcs), JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE ),
};

void JS_AddIntrinsicAtomics(JSContext *ctx)
{
    /* add Atomics as autoinit object */
    JS_SetPropertyFunctionList(ctx, ctx->global_obj, js_atomics_obj, countof(js_atomics_obj));
}

#endif /* CONFIG_ATOMICS */

inline void JS_AddIntrinsicTypedArrays(JSContext *ctx)
{
    JSValue typed_array_base_proto, typed_array_base_func;
    JSValueConst array_buffer_func, shared_array_buffer_func;
    int i;

    ctx->class_proto[JS_CLASS_ARRAY_BUFFER] = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_ARRAY_BUFFER],
                               js_array_buffer_proto_funcs,
                               countof(js_array_buffer_proto_funcs));

    array_buffer_func = JS_NewGlobalCConstructorOnly(ctx, "ArrayBuffer",
                                                 js_array_buffer_constructor, 1,
                                                 ctx->class_proto[JS_CLASS_ARRAY_BUFFER]);
    JS_SetPropertyFunctionList(ctx, array_buffer_func,
                               js_array_buffer_funcs,
                               countof(js_array_buffer_funcs));

    ctx->class_proto[JS_CLASS_SHARED_ARRAY_BUFFER] = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_SHARED_ARRAY_BUFFER],
                               js_shared_array_buffer_proto_funcs,
                               countof(js_shared_array_buffer_proto_funcs));

    shared_array_buffer_func = JS_NewGlobalCConstructorOnly(ctx, "SharedArrayBuffer",
                                                 js_shared_array_buffer_constructor, 1,
                                                 ctx->class_proto[JS_CLASS_SHARED_ARRAY_BUFFER]);
    JS_SetPropertyFunctionList(ctx, shared_array_buffer_func,
                               js_shared_array_buffer_funcs,
                               countof(js_shared_array_buffer_funcs));

    typed_array_base_proto = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, typed_array_base_proto,
                               js_typed_array_base_proto_funcs,
                               countof(js_typed_array_base_proto_funcs));

    /* TypedArray.prototype.toString must be the same object as Array.prototype.toString */
    JSValue obj = JS_GetProperty(ctx, ctx->class_proto[JS_CLASS_ARRAY], JS_ATOM_toString);
    /* XXX: should use alias method in JSCFunctionListEntry */ //@@@
    JS_DefinePropertyValue(ctx, typed_array_base_proto, JS_ATOM_toString, obj,
                           JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);

    typed_array_base_func = JS_NewCFunction(ctx, js_typed_array_base_constructor,
                                            "TypedArray", 0);
    JS_SetPropertyFunctionList(ctx, typed_array_base_func,
                               js_typed_array_base_funcs,
                               countof(js_typed_array_base_funcs));
    JS_SetConstructor(ctx, typed_array_base_func, typed_array_base_proto);

    for(i = JS_CLASS_UINT8C_ARRAY; i < JS_CLASS_UINT8C_ARRAY + JS_TYPED_ARRAY_COUNT; i++) {
        JSValue func_obj;
        char buf[ATOM_GET_STR_BUF_SIZE];
        const char *name;

        ctx->class_proto[i] = JS_NewObjectProto(ctx, typed_array_base_proto);
        JS_DefinePropertyValueStr(ctx, ctx->class_proto[i],
                                  "BYTES_PER_ELEMENT",
                                  JS_NewInt32(ctx, 1 << typed_array_size_log2(i)),
                                  0);
        name = JS_AtomGetStr(ctx, buf, sizeof(buf),
                             JS_ATOM_Uint8ClampedArray + i - JS_CLASS_UINT8C_ARRAY);
        func_obj = JS_NewCFunction3(ctx, (JSCFunction *)js_typed_array_constructor,
                                    name, 3, JS_CFUNC_constructor_magic, i,
                                    typed_array_base_func);
        JS_NewGlobalCConstructor2(ctx, func_obj, name, ctx->class_proto[i]);
        JS_DefinePropertyValueStr(ctx, func_obj,
                                  "BYTES_PER_ELEMENT",
                                  JS_NewInt32(ctx, 1 << typed_array_size_log2(i)),
                                  0);
    }
    JS_FreeValue(ctx, typed_array_base_proto);
    JS_FreeValue(ctx, typed_array_base_func);

    /* DataView */
    ctx->class_proto[JS_CLASS_DATAVIEW] = JS_NewObject(ctx);
    JS_SetPropertyFunctionList(ctx, ctx->class_proto[JS_CLASS_DATAVIEW],
                               js_dataview_proto_funcs,
                               countof(js_dataview_proto_funcs));
    JS_NewGlobalCConstructorOnly(ctx, "DataView",
                                 js_dataview_constructor, 1,
                                 ctx->class_proto[JS_CLASS_DATAVIEW]);
    /* Atomics */
#ifdef CONFIG_ATOMICS
    JS_AddIntrinsicAtomics(ctx);
#endif
}

#undef js_unlikely
#undef js_force_inline

#include "../platform/choc_ReenableAllWarnings.h"

//==============================================================================
struct QuickJSContext  : public Context::Pimpl
{
    QuickJSContext()
    {
        createContext();
        functionArgs.reserve (32);
    }

    ~QuickJSContext() override
    {
        freeContext();
    }

    void freeContext()
    {
        if (context) { JS_FreeContext (context); context = {}; }
        if (runtime) { JS_FreeRuntime (runtime); runtime = {}; }
    }

    void createContext()
    {
        runtime = JS_NewRuntime();
        context = JS_NewContext (runtime);
        CHOC_ASSERT (context != nullptr);
        JS_SetContextOpaque (context, this);
    }

    void pumpMessageLoop() override {}

    void pushObjectOrArray (const choc::value::ValueView& v) override { functionArgs.push_back (valueToJS (v).release()); }
    void pushArg (std::string_view v) override                        { functionArgs.push_back (stringToJS (v).release()); }
    void pushArg (int32_t v) override                                 { functionArgs.push_back (JS_NewInt32   (context, v)); }
    void pushArg (int64_t v) override                                 { functionArgs.push_back (JS_NewInt64   (context, v)); }
    void pushArg (uint32_t v) override                                { functionArgs.push_back (JS_NewUint32  (context, v)); }
    void pushArg (double v) override                                  { functionArgs.push_back (JS_NewFloat64 (context, v)); }
    void pushArg (bool v) override                                    { functionArgs.push_back (JS_NewBool    (context, v)); }

    choc::value::Value evaluateExpression (const std::string& code) override
    {
        return takeValue (JS_Eval (context, code.c_str(), code.size(), "", JS_EVAL_TYPE_GLOBAL)).toChocValue();
    }

    void run (const std::string& code, Context::ReadModuleContentFn* resolveModule, Context::CompletionHandler handleResult) override
    {
        try
        {
            if (resolveModule != nullptr)
            {
                JS_SetModuleLoaderFunc (runtime, nullptr, moduleLoaderFunc, resolveModule);
                auto result = takeValue (JS_Eval (context, code.c_str(), code.size(), "", JS_EVAL_TYPE_MODULE));
                JS_SetModuleLoaderFunc (runtime, nullptr, nullptr, nullptr);

                if (handleResult)
                    handleResult ({}, result.toChocValue());
            }
            else
            {
                auto result = takeValue (JS_Eval (context, code.c_str(), code.size(), "", JS_EVAL_TYPE_GLOBAL));

                if (handleResult)
                    handleResult ({}, result.toChocValue());
            }
        }
        catch (const std::exception& e)
        {
            if (handleResult)
                handleResult (e.what(), {});
        }
    }

    static JSModuleDef* moduleLoaderFunc (JSContext* ctx, const char* moduleName, void* resolveModule)
    {
        auto content = (*static_cast<Context::ReadModuleContentFn*> (resolveModule)) (std::string_view (moduleName));

        if (! content)
            throw Error ("Cannot find module '" + std::string (moduleName) + "'");

        auto result = ValuePtr (JS_Eval (ctx, content->data(), content->length(), moduleName,
                                         JS_EVAL_TYPE_MODULE | JS_EVAL_FLAG_COMPILE_ONLY), ctx);
        result.throwIfError();
        return static_cast<JSModuleDef*> (JS_VALUE_GET_PTR (result.get()));
    }

    void prepareForCall (std::string_view functionName, uint32_t) override
    {
        functionToCall = JS_NewAtomLen (context, functionName.data(), functionName.length());
    }

    choc::value::Value performCall() override
    {
        auto global = takeValue (JS_GetGlobalObject (context));
        auto returnVal = takeValue (JS_Invoke (context, global.get(), functionToCall, static_cast<int> (functionArgs.size()), functionArgs.data()));
        JS_FreeAtom (context, functionToCall);

        for (auto arg : functionArgs)
            JS_FreeValue (context, arg);

        functionArgs.clear();
        return returnVal.toChocValue();
    }

    //==============================================================================
    struct ValuePtr
    {
        ValuePtr() = delete;
        ValuePtr (const ValuePtr&) = delete;
        ValuePtr& operator= (const ValuePtr&) = delete;
        ValuePtr (JSValue v, JSContext* c) : value (v), context (c) {}
        ValuePtr (ValuePtr&& other) : value (other.value), context (other.context) { other.context = {}; }
        ValuePtr& operator= (ValuePtr&& other) { reset(); value = other.value; context = other.context; other.context = {}; return *this; }
        ~ValuePtr() { reset(); }

        void reset()                { if (context) JS_FreeValue (context, value); }
        JSValue release()           { auto v = value; context = {}; return v; }
        JSValue get() const         { return value; }

        std::string toString() const
        {
            CHOC_ASSERT (context != nullptr);

            if (JS_IsUndefined (value))
                return {};

            size_t len = 0;
            auto c = JS_ToCStringLen2 (context, &len, value, false);
            std::string s (c, len);
            JS_FreeCString (context, c);
            return s;
        }

        ValuePtr operator[] (uint32_t index) const    { return takeValue (JS_GetPropertyUint32 (context, value, index)); }
        ValuePtr operator[] (const char* name) const  { return takeValue (JS_GetPropertyStr (context, value, name)); }

        choc::value::Value toChocValue() const
        {
            CHOC_ASSERT (context != nullptr);

            if (JS_IsNumber (value))
            {
                double d = 0;
                JS_ToFloat64 (context, std::addressof (d), value);
                return choc::value::createFloat64 (d);
            }

            if (JS_IsBool (value))
                return choc::value::createBool (JS_ToBool (context, value) != 0);

            if (JS_IsString (value))
            {
                size_t len = 0;
                auto s = JS_ToCStringLen2 (context, std::addressof (len), value, false);
                auto val = choc::value::createString (std::string_view (s, len));
                JS_FreeCString (context, s);
                return val;
            }

            if (JS_IsArray (context, value))
            {
                auto lengthProp = (*this)["length"];
                uint32_t len = 0;
                JS_ToUint32 (context, &len, lengthProp.get());

                return choc::value::createArray (len, [this] (uint32_t i)
                {
                    return (*this)[i].toChocValue();
                });
            }

            if (JS_IsObject (value))
            {
                std::vector<std::string> propNames;
                bool hasClassName = false;

                for (auto obj = takeValue (JS_DupValue (context, value));;)
                {
                    JSPropertyEnum* properties = nullptr;
                    uint32_t numProps = 0;

                    if (JS_GetOwnPropertyNames (context, &properties, &numProps, obj.get(), JS_GPN_STRING_MASK | JS_GPN_ENUM_ONLY) != 0)
                        return choc::value::createObject ({});

                    propNames.reserve (numProps);

                    for (uint32_t i = 0; i < numProps; ++i)
                    {
                        auto name = JS_AtomToCString (context, properties[i].atom);
                        auto nameString = std::string (name);

                        if (nameString == objectNameAttribute)
                            hasClassName = true;
                        else
                            propNames.push_back (std::move (nameString));

                        JS_FreeCString (context, name);
                        JS_FreeAtom (context, properties[i].atom);
                    }

                    if (properties != nullptr)
                        js_free (context, properties);

                    auto proto = takeValue (JS_GetPrototype (context, obj.get()));

                    if (! JS_IsObject (proto.get()))
                        break;

                    obj = std::move (proto);
                }

                auto o = choc::value::createObject (hasClassName ? (*this)[objectNameAttribute].toChocValue().toString()
                                                                 : std::string());

                for (auto& propName : propNames)
                    o.setMember (propName, (*this)[propName.c_str()].toChocValue());

                return o;
            }

            throwIfError();
            return {};
        }

        void throwIfError() const
        {
            if (JS_IsError (context, value))
                throw Error (toString());

            if (JS_IsException (value))
            {
                auto exception = takeValue (JS_GetException (context));
                throw Error (exception["message"].toString() + "\n" + exception["stack"].toString());
            }
        }

        ValuePtr takeValue (JSValue v) const   { return ValuePtr (v, context); }

        JSValue value;
        JSContext* context;
    };

    //==============================================================================
    ValuePtr takeValue (JSValue v) const    { return ValuePtr (v, context); }

    static JSValue callbackFunction (JSContext* c, JSValueConst, int argc, JSValueConst* args, int magic)
    {
        auto context = static_cast<QuickJSContext*> (JS_GetContextOpaque (c));
        return context->invokeCallback (static_cast<uint32_t> (magic), args, argc);
    }

    JSValue invokeCallback (uint32_t magic, JSValueConst* args, int numArgs)
    {
        std::vector<choc::value::Value> argList;
        argList.reserve (static_cast<uint32_t> (numArgs));

        for (int i = 0; i < numArgs; ++i)
        {
            auto arg = takeValue (args[i]);
            argList.push_back (arg.toChocValue());
            arg.release();
        }

        auto& fn = registeredFunctions[magic];
        return valueToJS (fn (ArgumentList { argList.data(), argList.size() })).release();
    }

    void registerFunction (const std::string& name, Context::NativeFunction fn) override
    {
        auto global = JS_GetGlobalObject (context);
        auto f = JS_NewCFunctionMagic (context, callbackFunction, name.c_str(), 0, JS_CFUNC_generic_magic, static_cast<int> (registeredFunctions.size()));
        JS_SetPropertyStr (context, global, name.c_str(), f);
        JS_FreeValue (context, global);

        registeredFunctions.push_back (std::move (fn));
    }

    ValuePtr stringToJS (std::string_view s)
    {
        return takeValue (JS_NewStringLen (context, s.data(), s.length()));
    }

    ValuePtr valueToJS (const choc::value::ValueView& v)
    {
        if (v.isInt32())    return takeValue (JS_NewInt32   (context, v.get<int32_t>()));
        if (v.isInt64())    return takeValue (JS_NewInt64   (context, v.get<int64_t>()));
        if (v.isFloat())    return takeValue (JS_NewFloat64 (context, v.get<double>()));
        if (v.isBool())     return takeValue (JS_NewBool    (context, v.getBool()));
        if (v.isString())   return stringToJS (v.getString());

        if (v.isArray() || v.isVector())
        {
            auto a = takeValue (JS_NewArray (context));
            uint32_t index = 0;

            for (auto element : v)
                JS_SetPropertyUint32 (context, a.get(), index++, valueToJS (element).release());

            return a;
        }

        if (v.isObject())
        {
            auto o = takeValue (JS_NewObject (context));

            if (auto className = v.getObjectClassName(); ! className.empty())
                JS_SetPropertyStr (context, o.get(), objectNameAttribute, stringToJS (className).release());

            v.visitObjectMembers ([&] (std::string_view name, const choc::value::ValueView& value)
            {
                JS_SetPropertyStr (context, o.get(), std::string (name).c_str(), valueToJS (value).release());
            });

            return o;
        }

        CHOC_ASSERT (v.isVoid());
        return takeValue (JS_UNDEFINED);
    }

    //==============================================================================
    JSRuntime* runtime = {};
    JSContext* context = {};
    std::vector<Context::NativeFunction> registeredFunctions;
    std::vector<JSValue> functionArgs;
    JSAtom functionToCall = {};

    static constexpr const char* objectNameAttribute = "_objectName";
};

} // namespace quickjs

inline Context createQuickJSContext()
{
    return Context (std::make_unique<quickjs::QuickJSContext>());
}

} // namespace choc::javascript

#endif // CHOC_JAVASCRIPT_QUICKJS_HEADER_INCLUDED