1.\" $OpenBSD: iswctype.3,v 1.5 2017/09/05 03:16:13 schwarze Exp $ 2.\" $NetBSD: iswctype.3,v 1.5 2003/04/16 13:34:40 wiz Exp $ 3.\" 4.\" Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org> 5.\" Copyright (c) 2003 Citrus Project 6.\" All rights reserved. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.Dd $Mdocdate: September 5 2017 $ 30.Dt ISWCTYPE 3 31.Os 32.Sh NAME 33.Nm iswctype , 34.Nm iswctype_l 35.Nd test whether a wide character belongs to a character class 36.Sh SYNOPSIS 37.In wctype.h 38.Ft int 39.Fn iswctype "wint_t wc" "wctype_t charclass" 40.Ft int 41.Fn iswctype_l "wint_t wc" "wctype_t charclass" "locale_t locale" 42.Sh DESCRIPTION 43These functions test whether the wide character 44.Fa wc 45belongs to 46.Fa charclass . 47.Pp 48The behaviour is undefined if 49.Fa charclass 50or 51.Fa wc 52is invalid. 53When 54.Fa charclass 55is retrieved with 56.Xr wctype 3 , 57it becomes invalid when the thread-specific character encoding locale 58is changed with 59.Xr uselocale 3 60or when the global character encoding locale is changed with 61.Xr setlocale 3 . 62When 63.Fa charclass 64is retrieved with 65.Xr wctype_l 3 , 66it is only valid for use with the same 67.Fa locale 68argument. 69.Sh RETURN VALUES 70These functions return zero if the character tests false 71or non-zero if the character tests true. 72.Sh SEE ALSO 73.Xr iswalnum 3 , 74.Xr newlocale 3 , 75.Xr setlocale 3 , 76.Xr towctrans 3 , 77.Xr wctype 3 78.Sh STANDARDS 79The 80.Fn iswctype 81function conforms to 82.St -isoC-amd1 , 83and 84.Fn iswctype_l 85to 86.St -p1003.1-2008 . 87.Sh HISTORY 88The 89.Fn iswctype 90function has been available since 91.Ox 3.8 , 92and 93.Fn iswctype_l 94since 95.Ox 6.2 . 96