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79 lines
1.7 KiB
C++
Executable File
79 lines
1.7 KiB
C++
Executable File
// LZOutWindow.h
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// #pragma once
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#ifndef __LZ_OUT_WINDOW_H
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#define __LZ_OUT_WINDOW_H
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#include "../../IStream.h"
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// m_KeepSizeBefore: how mach BYTEs must be in buffer before _pos;
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// m_KeepSizeAfter: how mach BYTEs must be in buffer after _pos;
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// m_KeepSizeReserv: how mach BYTEs must be in buffer for Moving Reserv;
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// must be >= aKeepSizeAfter; // test it
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class CLZOutWindowException
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{
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public:
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HRESULT ErrorCode;
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CLZOutWindowException(HRESULT errorCode): ErrorCode(errorCode) {}
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};
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class CLZOutWindow
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{
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BYTE *_buffer;
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UINT32 _pos;
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UINT32 _windowSize;
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UINT32 _streamPos;
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ISequentialOutStream *_stream;
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void FlushWithCheck();
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public:
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CLZOutWindow(): _buffer(0), _stream(0) {}
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~CLZOutWindow();
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void Create(UINT32 windowSize);
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bool IsCreated() const { return _buffer != 0; }
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void Init(ISequentialOutStream *stream, bool solid = false);
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HRESULT Flush();
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// void ReleaseStream();
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// UINT32 GetCurPos() const { return _pos; }
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// const BYTE *GetPointerToCurrentPos() const { return _buffer + _pos;};
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void CopyBackBlock(UINT32 distance, UINT32 len)
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{
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UINT32 pos = _pos - distance - 1;
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if (pos >= _windowSize)
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pos += _windowSize;
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for(; len > 0; len--)
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{
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if (pos >= _windowSize)
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pos = 0;
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_buffer[_pos++] = _buffer[pos++];
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if (_pos >= _windowSize)
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FlushWithCheck();
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// PutOneByte(GetOneByte(0 - distance));
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}
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}
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void PutOneByte(BYTE b)
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{
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_buffer[_pos++] = b;
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if (_pos >= _windowSize)
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FlushWithCheck();
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}
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BYTE GetOneByte(UINT32 index) const
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{
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UINT32 pos = _pos + index;
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if (pos >= _windowSize)
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pos += _windowSize;
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return _buffer[pos];
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}
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// BYTE *GetBuffer() const { return _buffer; }
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};
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#endif
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