WCSNCASECMP
Section: Linux Programmer's Manual (3)
Updated: 2016-03-15
Page Index
NAME
wcsncasecmp - compare two fixed-size wide-character strings, ignoring case
SYNOPSIS
#include <wchar.h>
int wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
wcsncasecmp():
-
- Since glibc 2.10:
-
_POSIX_C_SOURCE >= 200809L
- Before glibc 2.10:
-
_GNU_SOURCE
DESCRIPTION
The
wcsncasecmp()
function is the wide-character equivalent of the
strncasecmp(3)
function.
It compares the wide-character string pointed to
by
s1
and the wide-character string
pointed to by
s2,
but at most
n
wide characters from each string, ignoring case differences
(
towupper(3),
towlower(3)).
RETURN VALUE
The
wcsncasecmp()
function returns zero
if the wide-character strings at
s1
and
s2,
truncated to at most length
n,
are equal except
for case distinctions.
It returns a positive integer if truncated
s1
is
greater than truncated
s2,
ignoring case.
It returns a negative integer
if truncated
s1
is smaller than truncated
s2,
ignoring case.
VERSIONS
The
wcsncasecmp()
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
|
|
wcsncasecmp()
| Thread safety | MT-Safe locale
|
CONFORMING TO
POSIX.1-2008.
This function is not specified in POSIX.1-2001,
and is not widely available on other systems.
NOTES
The behavior of
wcsncasecmp()
depends on the
LC_CTYPE
category of the
current locale.
SEE ALSO
strncasecmp(3),
wcsncmp(3)
COLOPHON
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/.