rlm@1: // LzOutWindow.h
rlm@1: 
rlm@1: #ifndef __LZ_OUT_WINDOW_H
rlm@1: #define __LZ_OUT_WINDOW_H
rlm@1: 
rlm@1: #include "../IStream.h"
rlm@1: 
rlm@1: #include "../Common/OutBuffer.h"
rlm@1: 
rlm@1: #ifndef _NO_EXCEPTIONS
rlm@1: typedef COutBufferException CLzOutWindowException;
rlm@1: #endif
rlm@1: 
rlm@1: class CLzOutWindow: public COutBuffer
rlm@1: {
rlm@1: public:
rlm@1:   void Init(bool solid = false);
rlm@1:   
rlm@1:   // distance >= 0, len > 0,
rlm@1:   bool CopyBlock(UInt32 distance, UInt32 len)
rlm@1:   {
rlm@1:     UInt32 pos = _pos - distance - 1;
rlm@1:     if (distance >= _pos)
rlm@1:     {
rlm@1:       if (!_overDict || distance >= _bufferSize)
rlm@1:         return false;
rlm@1:       pos += _bufferSize;
rlm@1:     }
rlm@1:     if (_limitPos - _pos > len && _bufferSize - pos > len)
rlm@1:     {
rlm@1:       const Byte *src = _buffer + pos;
rlm@1:       Byte *dest = _buffer + _pos;
rlm@1:       _pos += len;
rlm@1:       do
rlm@1:         *dest++ = *src++;
rlm@1:       while(--len != 0);
rlm@1:     }
rlm@1:     else do
rlm@1:     {
rlm@1:       if (pos == _bufferSize)
rlm@1:         pos = 0;
rlm@1:       _buffer[_pos++] = _buffer[pos++];
rlm@1:       if (_pos == _limitPos)
rlm@1:         FlushWithCheck();
rlm@1:     }
rlm@1:     while(--len != 0);
rlm@1:     return true;
rlm@1:   }
rlm@1:   
rlm@1:   void PutByte(Byte b)
rlm@1:   {
rlm@1:     _buffer[_pos++] = b;
rlm@1:     if (_pos == _limitPos)
rlm@1:       FlushWithCheck();
rlm@1:   }
rlm@1:   
rlm@1:   Byte GetByte(UInt32 distance) const
rlm@1:   {
rlm@1:     UInt32 pos = _pos - distance - 1;
rlm@1:     if (pos >= _bufferSize)
rlm@1:       pos += _bufferSize;
rlm@1:     return _buffer[pos];
rlm@1:   }
rlm@1: };
rlm@1: 
rlm@1: #endif