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Diffstat (limited to 'docs/man/nng_msg_header_chop.3.adoc')
| -rw-r--r-- | docs/man/nng_msg_header_chop.3.adoc | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/docs/man/nng_msg_header_chop.3.adoc b/docs/man/nng_msg_header_chop.3.adoc new file mode 100644 index 00000000..78625365 --- /dev/null +++ b/docs/man/nng_msg_header_chop.3.adoc @@ -0,0 +1,54 @@ += nng_msg_header_chop(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_chop, nng_msg_header_chop_u32 - remove data from end of message header + +== SYNOPSIS + +[source, c] +---- +#include <nng/nng.h> + +int nng_msg_header_chop(nng_msg *msg, size_t size); + +int nng_msg_header_chop_u32(nng_msg *msg, uint32_t *val32); +---- + +== DESCRIPTION + +The `nng_msg_header_chop()` and `nng_msg_header_chop_u32()` functions remove +data from the end of the header 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 header is too short to remove the requested data. + +== SEE ALSO + +<<nng_msg_alloc.3#,nng_msg_alloc(3)>>, +<<nng_msg_header.3#,nng_msg_header(3)>>, +<<nng_msg_header_append.3#,nng_msg_header_append(3)>>, +<<nng_msg_header_insert.3#,nng_msg_header_insert(3)>>, +<<nng_msg_header_len.3#,nng_msg_header_len(3)>>, +<<nng_msg_header_trim.3#,nng_msg_header_trim(3)>>, +<<nng_msg_free.3#,nng_msg_free(3)>>, +<<nng_strerror.3#,nng_strerror(3)>>, +<<nng.7#,nng(7)>> |