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// LZOutWindow.h
#ifndef __LZ_OUT_WINDOW_H
#define __LZ_OUT_WINDOW_H
#include "../../IStream.h"
#ifndef _NO_EXCEPTIONS
class CLZOutWindowException
{
public:
HRESULT ErrorCode;
CLZOutWindowException(HRESULT errorCode): ErrorCode(errorCode) {}
};
#endif
class CLZOutWindow
{
Byte *_buffer;
UInt32 _pos;
UInt32 _windowSize;
UInt32 _streamPos;
ISequentialOutStream *_stream;
void FlushWithCheck();
public:
#ifdef _NO_EXCEPTIONS
HRESULT ErrorCode;
#endif
void Free();
CLZOutWindow(): _buffer(0), _stream(0) {}
~CLZOutWindow() { Free(); ReleaseStream(); }
bool Create(UInt32 windowSize);
void SetStream(ISequentialOutStream *stream);
void Init(bool solid = false);
HRESULT Flush();
void ReleaseStream();
void CopyBlock(UInt32 distance, UInt32 len)
{
UInt32 pos = _pos - distance - 1;
if (pos >= _windowSize)
pos += _windowSize;
for(; len > 0; len--)
{
if (pos >= _windowSize)
pos = 0;
_buffer[_pos++] = _buffer[pos++];
if (_pos >= _windowSize)
FlushWithCheck();
// PutOneByte(GetOneByte(distance));
}
}
void PutByte(Byte b)
{
_buffer[_pos++] = b;
if (_pos >= _windowSize)
FlushWithCheck();
}
Byte GetByte(UInt32 distance) const
{
UInt32 pos = _pos - distance - 1;
if (pos >= _windowSize)
pos += _windowSize;
return _buffer[pos];
}
};
#endif
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