release/src-rt-6.x/linux/linux-2.6/scripts/squashfs/lzma/C/7zip/Compress/LZ/LZOutWindow.h

   1 // LZOutWindow.h
   2
   3 #ifndef __LZ_OUT_WINDOW_H
   4 #define __LZ_OUT_WINDOW_H
   5
   6 #include "../../IStream.h"
   7 #include "../../Common/OutBuffer.h"
   8
   9 /*
  10 #ifndef _NO_EXCEPTIONS
  11 class CLZOutWindowException
  12 {
  13 public:
  14   HRESULT ErrorCode;
  15   CLZOutWindowException(HRESULT errorCode): ErrorCode(errorCode) {}
  16 };
  17 #endif
  18 */
  19 typedef COutBufferException CLZOutWindowException;
  20
  21 class CLZOutWindow: public COutBuffer
  22 {
  23 public:
  24   void Init(bool solid = false);
  25
  26   // distance >= 0, len > 0,
  27   bool CopyBlock(UInt32 distance, UInt32 len)
  28   {
  29     UInt32 pos = _pos - distance - 1;
  30     if (pos >= _bufferSize)
  31     {
  32       if (!_overDict)
  33         return false;
  34       pos += _bufferSize;
  35     }
  36     do
  37     {
  38       if (pos == _bufferSize)
  39         pos = 0;
  40       _buffer[_pos++] = _buffer[pos++];
  41       if (_pos == _limitPos)
  42         FlushWithCheck();
  43     }
  44     while(--len != 0);
  45     return true;
  46   }
  47
  48   void PutByte(Byte b)
  49   {
  50     _buffer[_pos++] = b;
  51     if (_pos == _limitPos)
  52       FlushWithCheck();
  53   }
  54
  55   Byte GetByte(UInt32 distance) const
  56   {
  57     UInt32 pos = _pos - distance - 1;
  58     if (pos >= _bufferSize)
  59       pos += _bufferSize;
  60     return _buffer[pos];
  61   }
  62 };
  63
  64 #endif