// LZ.OutWindow
package com.badlogic.gdx.utils.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];
}
}