nng_msg_trim.3.adoc

nng_msg_trim(3)

NAME

nng_msg_trim, nng_msg_trim_u32 - remove data from start of message body

SYNOPSIS

#include <nng/nng.h>

int nng_msg_trim(nng_msg *msg, size_t size);

int nng_msg_trim_u32(nng_msg *msg, uint32_t *val32);

DESCRIPTION

The nng_msg_trim() and nng_msg_trim_u32() functions remove data from the start of the body of message msg. The first function removes size bytes. The second function removes 4 bytes, and stores them in the value val32, after converting them from network-byte order (big-endian) to native byte order.

RETURN VALUES

This function returns 0 on success, and non-zero otherwise.

ERRORS

NNG_EINVAL

The message body is too short to remove the requested data.

SEE ALSO

nng_msg_alloc(3), nng_msg_append(3), nng_msg_body(3), nng_msg_chop(3), nng_msg_free(3), nng_msg_insert(3), nng_msg_len(3), nng_msg_realloc(3), nng_strerror(3), nng_msg(5), nng(7)