public bool compress(ByteBuffer @in, ByteBuffer @out, ByteBuffer overflow)
{
int inBytes = @in.remaining();
// I should work on a patch for Snappy to support an overflow buffer
// to prevent the extra buffer copy.
byte[] compressed = new byte[Snappy.maxCompressedLength(inBytes)];
int outBytes =
Snappy.compress(@in.array(), @in.arrayOffset() + @in.position(), inBytes,
compressed, 0);
if (outBytes < inBytes)
{
int remaining = @out.remaining();
if (remaining >= outBytes)
{
Array.Copy(compressed, 0, @out.array(), @out.arrayOffset() +
@out.position(), outBytes);
@out.position(@out.position() + outBytes);
}
else
{
Array.Copy(compressed, 0, @out.array(), @out.arrayOffset() +
@out.position(), remaining);
@out.position(@out.limit());
Array.Copy(compressed, remaining, overflow.array(),
overflow.arrayOffset(), outBytes - remaining);
overflow.position(outBytes - remaining);
}
return(true);
}
else
{
return(false);
}
}