WCSNLEN
Section: Linux Programmer's Manual (3)
Updated: 2016-03-15
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NAME
wcsnlen - determine the length of a fixed-size wide-character string
SYNOPSIS
#include <wchar.h>
size_t wcsnlen(const wchar_t *s, size_t maxlen);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
wcsnlen():
-
- Since glibc 2.10:
-
_POSIX_C_SOURCE >= 200809L
- Before glibc 2.10:
-
_GNU_SOURCE
DESCRIPTION
The
wcsnlen()
function is the wide-character equivalent
of the
strnlen(3)
function.
It returns the number of wide-characters in the string pointed to by
s,
not including the terminating null wide character (Laq\0aq),
but at most
maxlen
wide characters (note: this parameter is not a byte count).
In doing this,
wcsnlen()
looks at only the first
maxlen
wide characters at
s
and never beyond
s+maxlen.
RETURN VALUE
The
wcsnlen()
function returns
wcslen(s),
if that is less than
maxlen,
or
maxlen
if there is no null wide character among the
first
maxlen
wide characters pointed to by
s.
VERSIONS
The
wcsnlen()
function is provided in glibc since version 2.1.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
wcsnlen()
| Thread safety | MT-Safe
|
CONFORMING TO
POSIX.1-2008.
SEE ALSO
strnlen(3),
wcslen(3)
COLOPHON
This page is part of release 4.13 of the Linux
man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
https://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- VERSIONS
-
- ATTRIBUTES
-
- CONFORMING TO
-
- SEE ALSO
-
- COLOPHON
-
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