diff options
Diffstat (limited to '3rdparty/lzma/Java/SevenZip/Compression/LZ/OutWindow.java')
-rw-r--r-- | 3rdparty/lzma/Java/SevenZip/Compression/LZ/OutWindow.java | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/3rdparty/lzma/Java/SevenZip/Compression/LZ/OutWindow.java b/3rdparty/lzma/Java/SevenZip/Compression/LZ/OutWindow.java new file mode 100644 index 00000000000..2fd283214e3 --- /dev/null +++ b/3rdparty/lzma/Java/SevenZip/Compression/LZ/OutWindow.java @@ -0,0 +1,85 @@ +// LZ.OutWindow + +package SevenZip.Compression.LZ; + +import java.io.IOException; + +public class OutWindow +{ + byte[] _buffer; + int _pos; + int _windowSize = 0; + int _streamPos; + java.io.OutputStream _stream; + + public void Create(int windowSize) + { + if (_buffer == null || _windowSize != windowSize) + _buffer = new byte[windowSize]; + _windowSize = windowSize; + _pos = 0; + _streamPos = 0; + } + + public void SetStream(java.io.OutputStream stream) throws IOException + { + ReleaseStream(); + _stream = stream; + } + + public void ReleaseStream() throws IOException + { + Flush(); + _stream = null; + } + + public void Init(boolean solid) + { + if (!solid) + { + _streamPos = 0; + _pos = 0; + } + } + + public void Flush() throws IOException + { + int size = _pos - _streamPos; + if (size == 0) + return; + _stream.write(_buffer, _streamPos, size); + if (_pos >= _windowSize) + _pos = 0; + _streamPos = _pos; + } + + public void CopyBlock(int distance, int len) throws IOException + { + int pos = _pos - distance - 1; + if (pos < 0) + pos += _windowSize; + for (; len != 0; len--) + { + if (pos >= _windowSize) + pos = 0; + _buffer[_pos++] = _buffer[pos++]; + if (_pos >= _windowSize) + Flush(); + } + } + + public void PutByte(byte b) throws IOException + { + _buffer[_pos++] = b; + if (_pos >= _windowSize) + Flush(); + } + + public byte GetByte(int distance) + { + int pos = _pos - distance - 1; + if (pos < 0) + pos += _windowSize; + return _buffer[pos]; + } +} |