moredata = shuff_decode_chunk(shuff,(char*)&block_size,sizeof(Uint32),&decoded);
if (block_size > 0) {
moredata = shuff_decode_chunk(shuff,(char*)&z_len,sizeof(int),&decoded);
moredata = shuff_decode_chunk(shuff,(char*)&block_size,sizeof(Uint32),&decoded);
if (block_size > 0) {
moredata = shuff_decode_chunk(shuff,(char*)&z_len,sizeof(int),&decoded);