// This is called by Dispose:
private void PurgeBuffers(bool disposing)
{
if (!disposing)
{
return;
}
if (_stream == null)
{
return;
}
Flush();
if (_mode != CompressionMode.Compress)
{
return;
}
// Some deflaters (e.g. ZLib write more than zero bytes for zero bytes inpuits.
// This round-trips and we should be ok with this, but our legacy managed deflater
// always wrote zero output for zero input and upstack code (e.g. GZipStream)
// took dependencies on it. Thus, make sure to only "flush" when we actually had
// some input:
if (wroteBytes)
{
// Compress any bytes left:
WriteDeflaterOutput(false);
// Pull out any bytes left inside deflater:
bool finished;
do
{
int compressedBytes;
finished = deflater.Finish(buffer, out compressedBytes);
if (compressedBytes > 0)
{
DoWrite(buffer, 0, compressedBytes, false);
}
} while (!finished);
}
// Write format footer:
if (formatWriter != null && wroteHeader)
{
byte[] b = formatWriter.GetFooter();
_stream.Write(b, 0, b.Length);
}
}
// This is called by Dispose:
private void PurgeBuffers(bool disposing)
{
if (!disposing)
{
return;
}
if (_stream == null)
{
return;
}
Flush();
if (_mode != CompressionMode.Compress)
{
return;
}
// Some deflaters (e.g. ZLib write more than zero bytes for zero bytes inpuits.
// This round-trips and we should be ok with this, but our legacy managed deflater
// always wrote zero output for zero input and upstack code (e.g. GZipStream)
// took dependencies on it. Thus, make sure to only "flush" when we actually had
// some input:
if (_wroteBytes)
{
// Compress any bytes left:
WriteDeflaterOutput();
// Pull out any bytes left inside deflater:
bool finished;
do
{
int compressedBytes;
finished = _deflater.Finish(_buffer, out compressedBytes);
if (compressedBytes > 0)
{
DoWrite(_buffer, 0, compressedBytes);
}
} while (!finished);
}
else
{
// In case of zero length buffer, we still need to clean up the native created stream before
// the object get disposed because eventually ZLibNative.ReleaseHandle will get called during
// the dispose operation and although it frees the stream but it return error code because the
// stream state was still marked as in use. The symptoms of this problem will not be seen except
// if running any diagnostic tools which check for disposing safe handle objects
bool finished;
do
{
int compressedBytes;
finished = _deflater.Finish(_buffer, out compressedBytes);
} while (!finished);
}
// Write format footer:
if (_formatWriter != null && _wroteHeader)
{
byte[] b = _formatWriter.GetFooter();
_stream.Write(b, 0, b.Length);
}
}
