1 files changed, 67 insertions, 0 deletions
diff --git a/lib/common/ReadGatherStream.h b/lib/common/ReadGatherStream.h
new file mode 100644
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--- /dev/null
+++ b/lib/common/ReadGatherStream.h
@@ -0,0 +1,67 @@
+// --------------------------------------------------------------------------
+//
+// File
+//		Name:    ReadGatherStream.h
+//		Purpose: Build a stream (for reading only) out of a number of other streams.
+//		Created: 10/12/03
+//
+// --------------------------------------------------------------------------
+
+#ifndef READGATHERSTREAM_H
+#define READGATHERSTREAM_H
+
+#include "IOStream.h"
+
+#include <vector>
+
+// --------------------------------------------------------------------------
+//
+// Class
+//		Name:    ReadGatherStream
+//		Purpose: Build a stream (for reading only) out of a number of other streams.
+//		Created: 10/12/03
+//
+// --------------------------------------------------------------------------
+class ReadGatherStream : public IOStream
+{
+public:
+	ReadGatherStream(bool DeleteComponentStreamsOnDestruction);
+	~ReadGatherStream();
+private:
+	ReadGatherStream(const ReadGatherStream &);
+	ReadGatherStream &operator=(const ReadGatherStream &);
+public:
+
+	int AddComponent(IOStream *pStream);
+	void AddBlock(int Component, pos_type Length, bool Seek = false, pos_type SeekTo = 0);
+
+	virtual int Read(void *pBuffer, int NBytes, int Timeout = IOStream::TimeOutInfinite);
+	virtual pos_type BytesLeftToRead();
+	virtual void Write(const void *pBuffer, int NBytes);
+	virtual bool StreamDataLeft();
+	virtual bool StreamClosed();
+	virtual pos_type GetPosition() const;
+
+private:
+	bool mDeleteComponentStreamsOnDestruction;
+	std::vector<IOStream *> mComponents;
+	
+	typedef struct
+	{
+		pos_type mLength;
+		pos_type mSeekTo;
+		int mComponent;
+		bool mSeek;
+	} Block;
+	
+	std::vector<Block> mBlocks;
+	
+	pos_type mCurrentPosition;
+	pos_type mTotalSize;
+	unsigned int mCurrentBlock;
+	pos_type mPositionInCurrentBlock;
+	bool mSeekDoneForCurrent;
+};
+
+
+#endif // READGATHERSTREAM_H