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Diffstat (limited to 'docs/man/nng_msg_header_append.adoc')
| -rw-r--r-- | docs/man/nng_msg_header_append.adoc | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/docs/man/nng_msg_header_append.adoc b/docs/man/nng_msg_header_append.adoc new file mode 100644 index 00000000..a21da6dc --- /dev/null +++ b/docs/man/nng_msg_header_append.adoc @@ -0,0 +1,53 @@ += nng_msg_header_append(3) +// +// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech> +// Copyright 2018 Capitar IT Group BV <info@capitar.com> +// +// This document is supplied under the terms of the MIT License, a +// copy of which should be located in the distribution where this +// file was obtained (LICENSE.txt). A copy of the license may also be +// found online at https://opensource.org/licenses/MIT. +// + +== NAME + +nng_msg_header_append, nng_msg_header_append_u32 - append to message header + +== SYNOPSIS + +[source, c] +----------- +#include <nng/nng.h> + +int nng_msg_header_append(nng_msg *msg, const void *val, size_t size); +int nng_msg_header_append_u32(nng_msg *msg, uint32_t val32); +----------- + +== DESCRIPTION + +The `nng_msg_header_append()` and `nng_msg_header_append_u32()` +functions append data to +the end of the headers of message _msg_, reallocating it if necessary. +The first function appends _size_ bytes, copying them from _val_. The +second function appends the value _val32_ in network-byte order (big-endian). + + +== RETURN VALUES + +This function returns 0 on success, and non-zero otherwise. + +== ERRORS + +`NNG_ENOMEM`:: Insufficient free memory exists. + +== SEE ALSO + +<<nng_msg_alloc#,nng_msg_alloc(3)>>, +<<nng_msg_header#,nng_msg_header(3)>>, +<<nng_msg_header_chop#,nng_msg_header_chop(3)>>, +<<nng_msg_header_insert#,nng_msg_header_insert(3)>>, +<<nng_msg_header_len#,nng_msg_header_len(3)>>, +<<nng_msg_header_trim#,nng_msg_header_trim(3)>>, +<<nng_msg_free#,nng_msg_free(3)>>, +<<nng_strerror#,nng_strerror(3)>>, +<<nng#,nng(7)>> |