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// --------------------------------------------------------------------------
//
// File
// Name: CompressStream.h
// Purpose: Compressing stream
// Created: 27/5/04
//
// --------------------------------------------------------------------------
#ifndef COMPRESSSTREAM__H
#define COMPRESSSTREAM__H
#include "IOStream.h"
// --------------------------------------------------------------------------
//
// Class
// Name: CompressStream
// Purpose: Compressing stream
// Created: 27/5/04
//
// --------------------------------------------------------------------------
class CompressStream : public IOStream
{
public:
CompressStream(IOStream *pStream, bool TakeOwnership,
bool DecompressRead, bool CompressWrite, bool PassThroughWhenNotCompressed = false);
~CompressStream();
private:
// No copying (have implementations which exception)
CompressStream(const CompressStream &);
CompressStream &operator=(const CompressStream &);
public:
virtual int Read(void *pBuffer, int NBytes, int Timeout = IOStream::TimeOutInfinite);
virtual void Write(const void *pBuffer, int NBytes,
int Timeout = IOStream::TimeOutInfinite);
virtual void WriteAllBuffered(int Timeout = IOStream::TimeOutInfinite);
virtual void Close();
virtual bool StreamDataLeft();
virtual bool StreamClosed();
protected:
void CheckRead();
void CheckWrite();
void CheckBuffer();
void WriteCompressedData(bool SyncFlush = false,
int Timeout = IOStream::TimeOutInfinite);
private:
IOStream *mpStream;
bool mHaveOwnership;
bool mDecompressRead;
bool mCompressWrite;
bool mPassThroughWhenNotCompressed;
// Avoid having to include Compress.h
void *mpReadCompressor;
void *mpWriteCompressor;
void *mpBuffer;
bool mIsClosed;
};
#endif // COMPRESSSTREAM__H
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