1.\" $OpenBSD: wcscasecmp.3,v 1.5 2017/09/05 03:16:14 schwarze Exp $ 2.\" 3.\" Copyright (c) 1990, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org> 6.\" 7.\" This code is derived from software contributed to Berkeley by 8.\" Chris Torek. 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. Neither the name of the University nor the names of its contributors 18.\" may be used to endorse or promote products derived from this software 19.\" without specific prior written permission. 20.\" 21.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31.\" SUCH DAMAGE. 32.\" 33.\" @(#)strcasecmp.3 8.1 (Berkeley) 6/9/93 34.\" 35.Dd $Mdocdate: September 5 2017 $ 36.Dt WCSCASECMP 3 37.Os 38.Sh NAME 39.Nm wcscasecmp , 40.Nm wcscasecmp_l , 41.Nm wcsncasecmp , 42.Nm wcsncasecmp_l 43.Nd compare wide strings, ignoring case 44.Sh SYNOPSIS 45.In wchar.h 46.Ft int 47.Fo wcscasecmp 48.Fa "const wchar_t *s1" 49.Fa "const wchar_t *s2" 50.Fc 51.Ft int 52.Fo wcscasecmp_l 53.Fa "const wchar_t *s1" 54.Fa "const wchar_t *s2" 55.Fa "locale_t locale" 56.Fc 57.Ft int 58.Fo wcsncasecmp 59.Fa "const wchar_t *s1" 60.Fa "const wchar_t *s2" 61.Fa "size_t len" 62.Fc 63.Ft int 64.Fo wcsncasecmp_l 65.Fa "const wchar_t *s1" 66.Fa "const wchar_t *s2" 67.Fa "size_t len" 68.Fa "locale_t locale" 69.Fc 70.Sh DESCRIPTION 71These functions compare the wide strings 72.Fa s1 73and 74.Fa s2 75and return an integer greater than, equal to, or less than 0, 76according to whether 77.Fa s1 78is lexicographically greater than, equal to, or less than 79.Fa s2 80after translation of each corresponding wide character to lower case. 81The wide strings themselves are not modified. 82.Pp 83For the translation to lower case, 84.Fn wcscasecmp 85and 86.Fn wcsncasecmp 87use the thread-specific locale as defined with 88.Xr uselocale 3 , 89falling back to the global locale defined with 90.Xr setlocale 3 . 91.Fn wcscasecmp_l 92and 93.Fn wcsncasecmp_l 94use the 95.Fa locale 96argument instead. 97.Pp 98.Fn wcsncasecmp 99and 100.Fn wcsncasecmp_l 101compare at most 102.Fa len 103wide characters. 104.Sh SEE ALSO 105.Xr newlocale 3 , 106.Xr setlocale 3 , 107.Xr strcasecmp 3 , 108.Xr wcscmp 3 , 109.Xr wmemcmp 3 110.Sh STANDARDS 111These functions conform to 112.St -p1003.1-2008 . 113.Sh HISTORY 114The 115.Fn wcscasecmp 116and 117.Fn wcsncasecmp 118functions have been available since 119.Ox 5.0 , 120and 121.Fn wcscasecmp_l 122and 123.Fn wcsncasecmp_l 124since 125.Ox 6.2 . 126.Sh AUTHORS 127The 128.Ox 129versions of 130.Fn wcscasecmp 131and 132.Fn wcsncasecmp 133were implemented by 134.An Marc Espie Aq Mt espie@openbsd.org . 135