CMake: Add support for building JUCE projects with CMake

extras/Build/juce_build_tools/utils/juce_ResourceFileHelpers.cpp

@@ -0,0 +1,84 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE 6 technical preview.
+   Copyright (c) 2017 - ROLI Ltd.
+
+   You may use this code under the terms of the GPL v3
+   (see www.gnu.org/licenses).
+
+   For this technical preview, this file is not subject to commercial licensing.
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+namespace build_tools
+{
+    uint64 calculateStreamHashCode (InputStream& in)
+    {
+        uint64 t = 0;
+
+        const int bufferSize = 4096;
+        HeapBlock<uint8> buffer;
+        buffer.malloc (bufferSize);
+
+        for (;;)
+        {
+            auto num = in.read (buffer, bufferSize);
+
+            if (num <= 0)
+                break;
+
+            for (int i = 0; i < num; ++i)
+                t = t * 65599 + buffer[i];
+        }
+
+        return t;
+    }
+
+    uint64 calculateFileHashCode (const File& file)
+    {
+        std::unique_ptr<FileInputStream> stream (file.createInputStream());
+        return stream != nullptr ? calculateStreamHashCode (*stream) : 0;
+    }
+
+    uint64 calculateMemoryHashCode (const void* data, size_t numBytes)
+    {
+        uint64 t = 0;
+
+        for (size_t i = 0; i < numBytes; ++i)
+            t = t * 65599 + static_cast<const uint8*> (data)[i];
+
+        return t;
+    }
+
+    bool overwriteFileWithNewDataIfDifferent (const File& file, const void* data, size_t numBytes)
+    {
+        if (file.getSize() == (int64) numBytes
+            && calculateMemoryHashCode (data, numBytes) == calculateFileHashCode (file))
+            return true;
+
+        if (file.exists())
+            return file.replaceWithData (data, numBytes);
+
+        return file.getParentDirectory().createDirectory() && file.appendData (data, numBytes);
+    }
+
+    bool overwriteFileWithNewDataIfDifferent (const File& file, const MemoryOutputStream& newData)
+    {
+        return overwriteFileWithNewDataIfDifferent (file, newData.getData(), newData.getDataSize());
+    }
+
+    bool overwriteFileWithNewDataIfDifferent (const File& file, const String& newData)
+    {
+        const char* const utf8 = newData.toUTF8();
+        return overwriteFileWithNewDataIfDifferent (file, utf8, strlen (utf8));
+    }
+}
+}