Z_PACKET_FLUSH
} else if (flush == Z_PACKET_FLUSH) {
if (f == Z_PACKET_FLUSH && z->avail_in == 0 && z->avail_out != 0)
if (f != Z_PACKET_FLUSH)
rtn = deflate(&priv->cx, Z_PACKET_FLUSH);
rtn = inflate(&priv->cx, Z_PACKET_FLUSH);