nng_msg_header_chop - remove data from end of message header
NAME SYNOPSIS DESCRIPTION RETURN VALUES ERRORS SEE ALSONAME
nng_msg_header_chop − remove data from end of message header
SYNOPSIS
#include <nng/nng.h>
int
nng_msg_header_chop(nng_msg *msg, size_t size);
int nng_msg_header_chop_u16(nng_msg *msg, uint16_t *val16);
int nng_msg_header_chop_u32(nng_msg *msg, uint32_t *val32);
int nng_msg_header_chop_u64(nng_msg *msg, uint64_t
*val64);
DESCRIPTION
The nng_msg_header_chop() family of functions removes data from the end of the header of message msg. The first function removes size bytes. The remaining functions remove 2, 4, or 8 bytes, and stores them in the value (such as val32), after converting them from network−byte order (big−endian) to native byte order.
RETURN VALUES
These function return 0 on success, and non−zero otherwise.
ERRORS
NNG_EINVAL
The message header is too short to remove the requested data.
SEE ALSO
nng_msg_alloc(3), nng_msg_header(3), nng_msg_header_append(3), nng_msg_header_insert(3), nng_msg_header_len(3), nng_msg_header_trim(3), nng_msg_free(3), nng_strerror(3), nng(7)