WCSNLEN
Section: Linux Programmer's Manual (3)
Updated: 2013-11-25
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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:
-
_XOPEN_SOURCE >= 700 || _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 (L'\0'),
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
Multithreading (see pthreads(7))
The
wcsnlen()
function is thread-safe.
CONFORMING TO
POSIX.1-2008.
SEE ALSO
strnlen(3),
wcslen(3)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- VERSIONS
-
- ATTRIBUTES
-
- Multithreading (see pthreads(7))
-
- CONFORMING TO
-
- SEE ALSO
-
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