| .\" 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. |
| .\" %%%LICENSE_END |
| .\" |
| .\" 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 2016-03-15 "GNU" "Linux Programmer's Manual" |
| .SH NAME |
| wcscasecmp \- compare two wide-character strings, ignoring case |
| .SH SYNOPSIS |
| .nf |
| .B #include <wchar.h> |
| .PP |
| .BI "int wcscasecmp(const wchar_t *" s1 ", const wchar_t *" s2 ); |
| .fi |
| .PP |
| .in -4n |
| Feature Test Macro Requirements for glibc (see |
| .BR feature_test_macros (7)): |
| .in |
| .PP |
| .BR wcscasecmp (): |
| .PD 0 |
| .ad l |
| .RS 4 |
| .TP 4 |
| Since glibc 2.10: |
| _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 |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .TS |
| allbox; |
| lb lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR wcscasecmp () |
| T} Thread safety MT-Safe locale |
| .TE |
| .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) |
