Add unpacktool

unpacktool/DecompressorProxyReader.cpp

@@ -0,0 +1,45 @@
+#include "DecompressorProxyReader.h"
+
+#include "IDecompressor.h"
+
+DecompressorProxyReader::DecompressorProxyReader(IDecompressor *decompressor)
+	: m_decompressor(decompressor)
+	, m_currentPosition(0)
+{
+}
+
+size_t DecompressorProxyReader::Read(void *buffer, size_t sz)
+{
+	if (!m_decompressor->ReadBytes(buffer, sz))
+		return 0;
+
+	m_currentPosition += sz;
+
+	return sz;
+}
+
+size_t DecompressorProxyReader::FileSize() const
+{
+	return 0;
+}
+
+bool DecompressorProxyReader::SeekStart(FilePos_t pos)
+{
+	return pos == m_currentPosition;
+}
+
+bool DecompressorProxyReader::SeekCurrent(FilePos_t pos)
+{
+	return pos == 0;
+}
+
+bool DecompressorProxyReader::SeekEnd(FilePos_t pos)
+{
+	return false;
+}
+
+IFileReader::FilePos_t DecompressorProxyReader::GetPosition() const
+{
+	return m_currentPosition;
+}
+