unsafe void Write(byte *buffer, int count, LZMAAction action)
{
if (_mode == CompressionMode.Decompress)
{
throw new NotSupportedException("Can't write on a decompress stream!");
}
_wasWrittenTo = true;
_zstream->avail_in = (IntPtr)count;
_zstream->next_in = buffer;
do
{
var result = LZMANative.lzma_code(_zstream, action);
var avail_out = _zstream->avail_out.ToInt32();
if (avail_out < BufferSize)
{
var outSize = BufferSize - avail_out;
_compressedStream.Write(_tmpBuffer, 0, outSize);
_zstream->next_out = _tmpBufferPtr;
_zstream->avail_out = (IntPtr)BufferSize;
}
// Translate erros into specific exceptions
switch (result)
{
case LZMAStatus.LZMA_OK:
continue;
case LZMAStatus.LZMA_STREAM_END:
return;
case LZMAStatus.LZMA_MEM_ERROR:
case LZMAStatus.LZMA_MEMLIMIT_ERROR:
throw new OutOfMemoryException("liblzma return code: " + result);
default:
throw new Exception("liblzma return code: " + result);
}
} while ((_zstream->avail_in.ToInt32() > 0) || action == LZMAAction.LZMA_FINISH);
}
public unsafe int Read(byte *buffer, int length, int offset, int count)
{
if (_mode == CompressionMode.Compress)
{
throw new NotSupportedException("Can't read on a compress stream!");
}
var exitLoop = false;
_zstream->next_out = buffer + offset;
_zstream->avail_out = (IntPtr)count;
while (_zstream->avail_out.ToInt32() > 0 && exitLoop == false)
{
if (_zstream->avail_in.ToInt32() == 0)
{
var readLength = _compressedStream.Read(_tmpBuffer, 0, _tmpBuffer.Length);
_zstream->avail_in = (IntPtr)readLength;
_zstream->next_in = _tmpBufferPtr;
}
var result = LZMANative.lzma_code(_zstream, LZMAAction.LZMA_RUN);
if (result == LZMAStatus.LZMA_OK)
{
continue;
}
switch (result)
{
case LZMAStatus.LZMA_STREAM_END:
exitLoop = true;
break;
case LZMAStatus.LZMA_MEM_ERROR:
case LZMAStatus.LZMA_MEMLIMIT_ERROR:
throw new OutOfMemoryException("liblzma return code: " + result);
default:
throw new Exception("liblzma return code: " + result);
}
}
return(count - (int)_zstream->avail_out);
}
