private unsafe void RawWrite(byte *buffer, byte *pOutput, int count)
{
#if DEBUG
fixed(byte *bufferPointer = &_buffer[0])
{
Contracts.Assert(pOutput == bufferPointer);
}
#endif
Constants.RetCode ret;
_zstrm.AvailIn = (uint)count;
_zstrm.NextIn = buffer;
_zstrm.NextOut = pOutput + BufferUsed;
do
{
RefreshOutput(pOutput);
fixed(ZStream *pZstream = &_zstrm)
{
ret = Zlib.deflate(pZstream, Constants.Flush.NoFlush);
}
if (ret != Constants.RetCode.OK)
{
throw Contracts.Except("Zlib.deflate failed with {0}", ret);
}
} while (_zstrm.AvailIn > 0);
_zstrm.NextIn = null;
}
protected override void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
_disposed = true;
Constants.RetCode ret;
unsafe
{
fixed(ZStream *pZstream = &_zstrm)
{
ret = Zlib.inflateEnd(pZstream);
}
}
base.Dispose(disposing);
if (disposing)
{
GC.SuppressFinalize(this);
if (ret != Constants.RetCode.OK)
{
throw Contracts.Except("Zlib inflateEnd failed with {0}", ret);
}
}
}
protected override void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
_disposed = true;
Constants.RetCode disposeRet = Constants.RetCode.StreamEnd;
if (disposing)
{
unsafe
{
fixed(byte *pOutput = _buffer)
fixed(ZStream * pZstream = &_zstrm)
{
pZstream->AvailIn = 0;
pZstream->NextIn = null;
pZstream->NextOut = pOutput + BufferUsed;
do
{
RefreshOutput(pOutput);
disposeRet = Zlib.deflate(pZstream, Constants.Flush.Finish);
} while (disposeRet == Constants.RetCode.OK);
if (disposeRet == Constants.RetCode.StreamEnd)
{
Flush();
_compressed.Flush();
}
}
}
}
Constants.RetCode ret;
unsafe
{
fixed(ZStream *pZstream = &_zstrm)
{
ret = Zlib.deflateEnd(pZstream);
}
}
base.Dispose(disposing);
if (disposing)
{
GC.SuppressFinalize(this);
if (disposeRet != Constants.RetCode.StreamEnd)
{
throw Contracts.Except("Zlib deflate failed with {0}", disposeRet);
}
if (ret != Constants.RetCode.OK)
{
throw Contracts.Except("Zlib deflateEnd failed with {0}", ret);
}
}
}
public ZInflateStream(Stream compressed, bool useZlibFormat = false)
{
Constants.RetCode ret;
_compressed = compressed;
_buffer = new byte[1 << 15];
unsafe
{
fixed(ZStream *pZstream = &_zstrm)
{
ret = Zlib.InflateInit2(pZstream, useZlibFormat ? Constants.MaxBufferSize : -Constants.MaxBufferSize);
}
}
if (ret != Constants.RetCode.OK)
{
throw Contracts.Except("Could not initialize zstream. Error code: {0}", ret);
}
_bufferUsed = 0;
}
public ZDeflateStream(Stream compressed, Constants.Level level = Constants.Level.BestCompression,
Constants.Strategy strategy = Constants.Strategy.DefaultStrategy, int memLevel = 9,
bool useZlibFormat = false, int windowBits = Constants.MaxBufferSize)
{
Constants.RetCode ret;
_compressed = compressed;
_buffer = new byte[1 << 15];
unsafe
{
fixed(ZStream *pZstream = &_zstrm)
{
ret = Zlib.DeflateInit2(pZstream, (int)level, 8, useZlibFormat ? windowBits : -windowBits, memLevel, strategy);
}
}
if (ret != Constants.RetCode.OK)
{
throw Contracts.Except("Could not initialize zstream. Error code: {0}", ret);
}
_zstrm.AvailOut = (uint)_buffer.Length;
}
private unsafe int InternalRead(byte *pInput, byte *pOutput, int count)
{
Constants.RetCode ret;
_zstrm.NextIn = pInput + _bufferUsed - _zstrm.AvailIn;
_zstrm.NextOut = pOutput;
_zstrm.AvailOut = (uint)count;
do
{
if (_compressed != null && (_bufferUsed == 0 || _zstrm.AvailIn == 0))
{
_bufferUsed = _compressed.Read(_buffer, 0, _buffer.Length);
_zstrm.AvailIn = (uint)_bufferUsed;
if (_bufferUsed == 0)
{
break;
}
_zstrm.NextIn = pInput;
}
else
{
_zstrm.NextIn = pInput + _bufferUsed - _zstrm.AvailIn;
}
if (_zstrm.AvailIn == 0)
return(0);
fixed(ZStream *pZstream = &_zstrm)
{
ret = Zlib.inflate(pZstream, Constants.Flush.NoFlush);
if (!(ret == Constants.RetCode.StreamEnd || ret == Constants.RetCode.OK))
{
throw Contracts.Except($"{nameof(Zlib.inflate)} failed with {ret}");
}
}
} while (ret != Constants.RetCode.StreamEnd && _zstrm.AvailOut != 0);
return(count - (int)_zstrm.AvailOut);
}