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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | VERSIONS | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON |
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WCSNLEN(3) Linux Programmer's Manual WCSNLEN(3)
wcsnlen - determine the length of a fixed-size wide-character
string
#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
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.
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.
The wcsnlen() function is provided in glibc since version 2.1.
For an explanation of the terms used in this section, see
attributes(7).
┌──────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────┼───────────────┼─────────┤
│wcsnlen() │ Thread safety │ MT-Safe │
└──────────┴───────────────┴─────────┘
POSIX.1-2008.
strnlen(3), wcslen(3)
This page is part of release 5.10 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/.
GNU 2019-03-06 WCSNLEN(3)
Pages that refer to this page: strlen(3), signal-safety(7)
Copyright and license for this manual page
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