.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
.\"
.\" %%%LICENSE_START(GPLv2+_DOC_ONEPARA)
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 2 of
.\" the License, or (at your option) any later version.
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.\"
.\" References consulted:
.\"   GNU glibc-2 source code and manual
.\"   Dinkumware C library reference http://www.dinkumware.com/
.\"   OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
.\"
.TH WCSCASECMP 3 2014-01-22 "GNU" "Linux Programmer's Manual"
.SH NAME
wcscasecmp \- compare two wide-character strings, ignoring case
.SH SYNOPSIS
.nf
.B #include <wchar.h>
.sp
.BI "int wcscasecmp(const wchar_t *" s1 ", const wchar_t *" s2 );
.fi
.sp
.in -4n
Feature Test Macro Requirements for glibc (see
.BR feature_test_macros (7)):
.in
.sp
.BR wcscasecmp ():
.PD 0
.ad l
.RS 4
.TP 4
Since glibc 2.10:
_XOPEN_SOURCE\ >=\ 700 || _POSIX_C_SOURCE\ >=\ 200809L
.TP
Before glibc 2.10:
_GNU_SOURCE
.RE
.ad
.PD
.SH DESCRIPTION
The
.BR wcscasecmp ()
function is the wide-character equivalent of the
.BR strcasecmp (3)
function.
It compares the wide-character string pointed to
by
.I s1
and the wide-character string pointed to by
.IR s2 ,
ignoring
case differences
.RB ( towupper (3),
.BR towlower (3)).
.SH RETURN VALUE
The
.BR wcscasecmp ()
function returns zero if the wide-character strings at
.I s1
and
.I s2
are equal except for case distinctions.
It returns a
positive integer if
.I s1
is greater than
.IR s2 ,
ignoring case.
It
returns a negative integer if
.I s1
is smaller
than
.IR s2 ,
ignoring case.
.SH VERSIONS
The
.BR wcscasecmp ()
function is provided in glibc since version 2.1.
.SH ATTRIBUTES
.SS Multithreading (see pthreads(7))
The
.BR wcscasecmp ()
function is thread-safe with exceptions.
It can be safely used in multithreaded applications, as long as
.BR setlocale (3)
is not called to change the locale during its execution.
.SH CONFORMING TO
POSIX.1-2008.
This function is not specified in POSIX.1-2001,
and is not widely available on other systems.
.SH NOTES
The behavior of
.BR wcscasecmp ()
depends on the
.B LC_CTYPE
category of the
current locale.
.SH SEE ALSO
.BR strcasecmp (3),
.BR wcscmp (3)
.SH COLOPHON
This page is part of release 3.74 of the Linux
.I man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
\%http://www.kernel.org/doc/man\-pages/.