mirror of
https://github.com/juce-framework/JUCE.git
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100 lines
3.2 KiB
C
100 lines
3.2 KiB
C
/*
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* Copyright (C) 2016-2025 Muhammad Tayyab Akram
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <SheenBidi/SBConfig.h>
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#include "SBBase.h"
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#include "SBCodepoint.h"
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#include "SBCodepointSequence.h"
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SB_INTERNAL SBBoolean SBCodepointSequenceIsValid(const SBCodepointSequence *codepointSequence)
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{
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if (codepointSequence) {
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SBBoolean encodingValid = SBFalse;
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switch (codepointSequence->stringEncoding) {
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case SBStringEncodingUTF8:
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case SBStringEncodingUTF16:
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case SBStringEncodingUTF32:
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encodingValid = SBTrue;
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break;
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}
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return (encodingValid && codepointSequence->stringBuffer && codepointSequence->stringLength > 0);
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}
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return SBFalse;
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}
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SBCodepoint SBCodepointSequenceGetCodepointBefore(const SBCodepointSequence *codepointSequence, SBUInteger *stringIndex)
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{
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SBCodepoint codepoint = SBCodepointInvalid;
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switch (codepointSequence->stringEncoding) {
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case SBStringEncodingUTF8:
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codepoint = SBCodepointDecodePreviousFromUTF8(codepointSequence->stringBuffer, codepointSequence->stringLength, stringIndex);
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break;
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case SBStringEncodingUTF16:
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codepoint = SBCodepointDecodePreviousFromUTF16(codepointSequence->stringBuffer, codepointSequence->stringLength, stringIndex);
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break;
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case SBStringEncodingUTF32:
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if ((*stringIndex - 1) < codepointSequence->stringLength) {
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const SBUInt32 *buffer = codepointSequence->stringBuffer;
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*stringIndex -= 1;
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codepoint = buffer[*stringIndex];
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if (!SBCodepointIsValid(codepoint)) {
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codepoint = SBCodepointFaulty;
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}
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}
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break;
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}
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return codepoint;
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}
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SBCodepoint SBCodepointSequenceGetCodepointAt(const SBCodepointSequence *codepointSequence, SBUInteger *stringIndex)
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{
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SBCodepoint codepoint = SBCodepointInvalid;
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switch (codepointSequence->stringEncoding) {
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case SBStringEncodingUTF8:
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codepoint = SBCodepointDecodeNextFromUTF8(codepointSequence->stringBuffer, codepointSequence->stringLength, stringIndex);
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break;
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case SBStringEncodingUTF16:
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codepoint = SBCodepointDecodeNextFromUTF16(codepointSequence->stringBuffer, codepointSequence->stringLength, stringIndex);
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break;
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case SBStringEncodingUTF32:
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if (*stringIndex < codepointSequence->stringLength) {
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const SBUInt32 *buffer = codepointSequence->stringBuffer;
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codepoint = buffer[*stringIndex];
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*stringIndex += 1;
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if (!SBCodepointIsValid(codepoint)) {
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codepoint = SBCodepointFaulty;
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}
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}
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break;
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}
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return codepoint;
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}
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