Switch to zip archive format for resource data, prep work for moving from PICT/snd to BMP/WAV

PortabilityLayer/DeflateCodec.cpp

@@ -0,0 +1,83 @@
+#include "DeflateCodec.h"
+
+#include "IOStream.h"
+#include "MemoryManager.h"
+
+#include "zlib.h"
+
+namespace
+{
+	static voidpf ZlibAllocShim(voidpf opaque, uInt items, uInt size)
+	{
+		return static_cast<PortabilityLayer::MemoryManager*>(opaque)->Alloc(items * size);
+	}
+
+	void ZlibFreeShim(voidpf opaque, voidpf address)
+	{
+		static_cast<PortabilityLayer::MemoryManager*>(opaque)->Release(address);
+	}
+}
+
+namespace PortabilityLayer
+{
+	bool DeflateCodec::DecompressStream(IOStream *stream, size_t inSize, void *outBuffer, size_t outSize)
+	{
+		z_stream zstream;
+		zstream.zalloc = ZlibAllocShim;
+		zstream.zfree = ZlibFreeShim;
+		zstream.opaque = MemoryManager::GetInstance();
+
+		if (inflateInit2(&zstream, -15) != Z_OK)
+			return false;
+
+		const size_t bufferSize = 1024;
+		uint8_t buffer[1024];
+
+		zstream.avail_out = outSize;
+		zstream.next_out = static_cast<Bytef*>(outBuffer);
+		zstream.avail_in = 0;
+		zstream.next_in = buffer;
+
+		bool failed = false;
+		for (;;)
+		{
+			if (zstream.avail_in == 0)
+			{
+				const size_t sizeToRead = (bufferSize < inSize) ? bufferSize : inSize;
+
+				if (sizeToRead == 0)
+				{
+					// Ran out of input
+					failed = true;
+					break;
+				}
+
+				if (stream->Read(buffer, sizeToRead) != sizeToRead)
+				{
+					failed = true;
+					break;
+				}
+
+				zstream.avail_in = sizeToRead;
+				zstream.next_in = buffer;
+			}
+
+			int result = inflate(&zstream, Z_NO_FLUSH);
+			if (result == Z_STREAM_END)
+			{
+				failed = (zstream.avail_out != 0);
+				break;
+			}
+
+			if (result != Z_OK)
+			{
+				failed = true;
+				break;
+			}
+		}
+
+		inflateEnd(&zstream);
+
+		return !failed;
+	}
+}