int WPACKET_put_bytes(WPACKET *pkt, unsigned int val, size_t bytes);
int WPACKET_set_max_size(WPACKET *pkt, size_t maxsize);
int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len);
+int WPACKET_sub_memcpy(WPACKET *pkt, const void *src, size_t len,
+ size_t lenbytes);
int WPACKET_get_total_written(WPACKET *pkt, size_t *written);
int WPACKET_get_length(WPACKET *pkt, size_t *len);