diff options
Diffstat (limited to 'src/libs/7zip/win/CPP/7zip/Compress/LzOutWindow.h')
-rw-r--r-- | src/libs/7zip/win/CPP/7zip/Compress/LzOutWindow.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/libs/7zip/win/CPP/7zip/Compress/LzOutWindow.h b/src/libs/7zip/win/CPP/7zip/Compress/LzOutWindow.h new file mode 100644 index 000000000..d8d13c225 --- /dev/null +++ b/src/libs/7zip/win/CPP/7zip/Compress/LzOutWindow.h @@ -0,0 +1,66 @@ +// LzOutWindow.h + +#ifndef __LZ_OUT_WINDOW_H +#define __LZ_OUT_WINDOW_H + +#include "../IStream.h" + +#include "../Common/OutBuffer.h" + +#ifndef _NO_EXCEPTIONS +typedef COutBufferException CLzOutWindowException; +#endif + +class CLzOutWindow: public COutBuffer +{ +public: + void Init(bool solid = false); + + // distance >= 0, len > 0, + bool CopyBlock(UInt32 distance, UInt32 len) + { + UInt32 pos = _pos - distance - 1; + if (distance >= _pos) + { + if (!_overDict || distance >= _bufferSize) + return false; + pos += _bufferSize; + } + if (_limitPos - _pos > len && _bufferSize - pos > len) + { + const Byte *src = _buffer + pos; + Byte *dest = _buffer + _pos; + _pos += len; + do + *dest++ = *src++; + while(--len != 0); + } + else do + { + if (pos == _bufferSize) + pos = 0; + _buffer[_pos++] = _buffer[pos++]; + if (_pos == _limitPos) + FlushWithCheck(); + } + while(--len != 0); + return true; + } + + void PutByte(Byte b) + { + _buffer[_pos++] = b; + if (_pos == _limitPos) + FlushWithCheck(); + } + + Byte GetByte(UInt32 distance) const + { + UInt32 pos = _pos - distance - 1; + if (pos >= _bufferSize) + pos += _bufferSize; + return _buffer[pos]; + } +}; + +#endif |