public LzmaStream(byte[] properties, Stream inputStream, long inputSize, long outputSize,
Stream presetDictionary, bool isLZMA2)
{
this.inputStream = inputStream;
this.inputSize = inputSize;
this.outputSize = outputSize;
this.isLZMA2 = isLZMA2;
if (!isLZMA2)
{
dictionarySize = BitConverter.ToInt32(properties, 1);
outWindow.Create(dictionarySize);
if (presetDictionary != null)
outWindow.Train(presetDictionary);
rangeDecoder.Init(inputStream);
decoder = new Decoder();
decoder.SetDecoderProperties(properties);
props = properties;
availableBytes = outputSize < 0 ? long.MaxValue : outputSize;
rangeDecoderLimit = inputSize;
}
else
{
dictionarySize = 2 | (properties[0] & 1);
dictionarySize <<= (properties[0] >> 1) + 11;
outWindow.Create(dictionarySize);
if (presetDictionary != null)
{
outWindow.Train(presetDictionary);
needDictReset = false;
}
props = new byte[1];
availableBytes = 0;
}
}
private void decodeChunkHeader()
{
int control = inputStream.ReadByte();
inputPosition++;
if (control == 0x00)
{
endReached = true;
return;
}
if (control >= 0xE0 || control == 0x01)
{
needProps = true;
needDictReset = false;
outWindow.Reset();
}
else if (needDictReset)
{
throw new DataErrorException();
}
if (control >= 0x80)
{
uncompressedChunk = false;
availableBytes = (control & 0x1F) << 16;
availableBytes += (inputStream.ReadByte() << 8) + inputStream.ReadByte() + 1;
inputPosition += 2;
rangeDecoderLimit = (inputStream.ReadByte() << 8) + inputStream.ReadByte() + 1;
inputPosition += 2;
if (control >= 0xC0)
{
needProps = false;
props[0] = (byte)inputStream.ReadByte();
inputPosition++;
decoder = new Decoder();
decoder.SetDecoderProperties(props);
}
else if (needProps)
{
throw new DataErrorException();
}
else if (control >= 0xA0)
{
decoder = new Decoder();
decoder.SetDecoderProperties(props);
}
rangeDecoder.Init(inputStream);
}
else if (control > 0x02)
{
throw new DataErrorException();
}
else
{
uncompressedChunk = true;
availableBytes = (inputStream.ReadByte() << 8) + inputStream.ReadByte() + 1;
inputPosition += 2;
}
}
private void decodeChunkHeader()
{
int control = inputStream.ReadByte();
inputPosition++;
if (control == 0x00)
{
endReached = true;
return;
}
if (control >= 0xE0 || control == 0x01)
{
needProps = true;
needDictReset = false;
outWindow.Reset();
}
else if (needDictReset)
throw new DataErrorException();
if (control >= 0x80)
{
uncompressedChunk = false;
availableBytes = (control & 0x1F) << 16;
availableBytes += (inputStream.ReadByte() << 8) + inputStream.ReadByte() + 1;
inputPosition += 2;
rangeDecoderLimit = (inputStream.ReadByte() << 8) + inputStream.ReadByte() + 1;
inputPosition += 2;
if (control >= 0xC0)
{
needProps = false;
props[0] = (byte)inputStream.ReadByte();
inputPosition++;
decoder = new Decoder();
decoder.SetDecoderProperties(props);
}
else if (needProps)
throw new DataErrorException();
else if (control >= 0xA0)
{
decoder = new Decoder();
decoder.SetDecoderProperties(props);
}
rangeDecoder.Init(inputStream);
}
else if (control > 0x02)
throw new DataErrorException();
else
{
uncompressedChunk = true;
availableBytes = (inputStream.ReadByte() << 8) + inputStream.ReadByte() + 1;
inputPosition += 2;
}
}
private void decodeChunkHeader()
{
int num = this.inputStream.ReadByte();
this.inputPosition += 1L;
if (num == 0)
{
this.endReached = true;
}
else
{
if ((num >= 0xe0) || (num == 1))
{
this.needProps = true;
this.needDictReset = false;
this.outWindow.Reset();
}
else if (this.needDictReset)
{
throw new DataErrorException();
}
if (num < 0x80)
{
if (num > 2)
{
throw new DataErrorException();
}
this.uncompressedChunk = true;
this.availableBytes = ((this.inputStream.ReadByte() << 8) + this.inputStream.ReadByte()) + 1;
this.inputPosition += 2L;
}
else
{
this.uncompressedChunk = false;
this.availableBytes = (num & 0x1f) << 0x10;
this.availableBytes += ((this.inputStream.ReadByte() << 8) + this.inputStream.ReadByte()) + 1;
this.inputPosition += 2L;
this.rangeDecoderLimit = ((this.inputStream.ReadByte() << 8) + this.inputStream.ReadByte()) + 1;
this.inputPosition += 2L;
if (num >= 0xc0)
{
this.needProps = false;
this.props[0] = (byte)this.inputStream.ReadByte();
this.inputPosition += 1L;
this.decoder = new Decoder();
this.decoder.SetDecoderProperties(this.props);
}
else
{
if (this.needProps)
{
throw new DataErrorException();
}
if (num >= 160)
{
this.decoder = new Decoder();
this.decoder.SetDecoderProperties(this.props);
}
}
this.rangeDecoder.Init(this.inputStream);
}
}
}
