plucky (3) nng_msg_header_insert.3.gz

Provided by: libnng-dev_1.10.0-1_amd64 bug

NAME

       nng_msg_header_insert - prepend to message header

SYNOPSIS

           #include <nng/nng.h>

           int nng_msg_header_insert(nng_msg *msg, const void *val, size_t size);
           int nng_msg_header_insert_u16(nng_msg *msg, uint16_t val16);
           int nng_msg_header_insert_u32(nng_msg *msg, uint32_t val32);
           int nng_msg_header_insert_u64(nng_msg *msg, uint64_t val64);

DESCRIPTION

       The nng_msg_header_insert() family of functions prepends data to the front of the headers
       of message msg, reallocating if necessary. The first function prepends size bytes, copying
       them from val. The remaining functions prepend the specified value (such as val32) in
       network-byte order (big-endian).

RETURN VALUES

       These functions return 0 on success, and non-zero otherwise.

ERRORS

       NNG_ENOMEM
           Insufficient free memory exists.

SEE ALSO

       nng_msg_alloc(3), nng_msg_header(3), nng_msg_header_append(3), nng_msg_header_chop(3),
       nng_msg_header_len(3), nng_msg_header_trim(3), nng_msg_free(3), nng_msg_capacity(3),
       nng_msg_reserve(3), nng_msg_realloc(3), nng_strerror(3), nng(7)

                                            2025-01-05                   NNG_MSG_HEADER_INSERT(3)