1.\" $OpenBSD: iswalnum.3,v 1.6 2017/09/05 03:16:13 schwarze Exp $ 2.\" $NetBSD: iswalnum.3,v 1.8 2003/09/08 17:54:31 wiz Exp $ 3.\" 4.\" Copyright (c) 1991 The Regents of the University of California. 5.\" All rights reserved. 6.\" 7.\" This code is derived from software contributed to Berkeley by 8.\" the American National Standards Committee X3, on Information 9.\" Processing Systems. 10.\" 11.\" Redistribution and use in source and binary forms, with or without 12.\" modification, are permitted provided that the following conditions 13.\" are met: 14.\" 1. Redistributions of source code must retain the above copyright 15.\" notice, this list of conditions and the following disclaimer. 16.\" 2. Redistributions in binary form must reproduce the above copyright 17.\" notice, this list of conditions and the following disclaimer in the 18.\" documentation and/or other materials provided with the distribution. 19.\" 3. Neither the name of the University nor the names of its contributors 20.\" may be used to endorse or promote products derived from this software 21.\" without specific prior written permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" @(#)isalnum.3 5.2 (Berkeley) 6/29/91 36.\" 37.Dd $Mdocdate: September 5 2017 $ 38.Dt ISWALNUM 3 39.Os 40.Sh NAME 41.Nm iswalnum , 42.Nm iswalnum_l , 43.Nm iswalpha , 44.Nm iswalpha_l , 45.Nm iswblank , 46.Nm iswblank_l , 47.Nm iswcntrl , 48.Nm iswcntrl_l , 49.Nm iswdigit , 50.Nm iswdigit_l , 51.Nm iswgraph , 52.Nm iswgraph_l , 53.Nm iswlower , 54.Nm iswlower_l , 55.Nm iswprint , 56.Nm iswprint_l , 57.Nm iswpunct , 58.Nm iswpunct_l , 59.Nm iswspace , 60.Nm iswspace_l , 61.Nm iswupper , 62.Nm iswupper_l , 63.Nm iswxdigit , 64.Nm iswxdigit_l 65.Nd wide-character classification utilities 66.Sh SYNOPSIS 67.In wctype.h 68.Ft int 69.Fn iswalnum "wint_t wc" 70.Ft int 71.Fn iswalnum_l "wint_t wc" "locale_t locale" 72.Ft int 73.Fn iswalpha "wint_t wc" 74.Ft int 75.Fn iswalpha_l "wint_t wc" "locale_t locale" 76.Ft int 77.Fn iswblank "wint_t wc" 78.Ft int 79.Fn iswblank_l "wint_t wc" "locale_t locale" 80.Ft int 81.Fn iswcntrl "wint_t wc" 82.Ft int 83.Fn iswcntrl_l "wint_t wc" "locale_t locale" 84.Ft int 85.Fn iswdigit "wint_t wc" 86.Ft int 87.Fn iswdigit_l "wint_t wc" "locale_t locale" 88.Ft int 89.Fn iswgraph "wint_t wc" 90.Ft int 91.Fn iswgraph_l "wint_t wc" "locale_t locale" 92.Ft int 93.Fn iswlower "wint_t wc" 94.Ft int 95.Fn iswlower_l "wint_t wc" "locale_t locale" 96.Ft int 97.Fn iswprint "wint_t wc" 98.Ft int 99.Fn iswprint_l "wint_t wc" "locale_t locale" 100.Ft int 101.Fn iswpunct "wint_t wc" 102.Ft int 103.Fn iswpunct_l "wint_t wc" "locale_t locale" 104.Ft int 105.Fn iswspace "wint_t wc" 106.Ft int 107.Fn iswspace_l "wint_t wc" "locale_t locale" 108.Ft int 109.Fn iswupper "wint_t wc" 110.Ft int 111.Fn iswupper_l "wint_t wc" "locale_t locale" 112.Ft int 113.Fn iswxdigit "wint_t wc" 114.Ft int 115.Fn iswxdigit_l "wint_t wc" "locale_t locale" 116.Sh DESCRIPTION 117The functions are character classification utility functions, 118for use with wide characters 119.Po 120.Fa wchar_t 121or 122.Fa wint_t 123.Pc . 124See the description of singlebyte classification functions, like 125.Xr isalnum 3 , 126for details. 127.Pp 128The two-argument variants use the specified 129.Fa locale , 130while the others use the thread-specific locale set with 131.Xr uselocale 3 , 132falling back to the global locale set with 133.Xr setlocale 3 . 134.Sh RETURN VALUES 135The functions return zero if the character tests false and 136return non-zero if the character tests true. 137.Sh SEE ALSO 138.Xr isalnum 3 , 139.Xr isalpha 3 , 140.Xr isblank 3 , 141.Xr iscntrl 3 , 142.Xr isdigit 3 , 143.Xr isgraph 3 , 144.Xr islower 3 , 145.Xr isprint 3 , 146.Xr ispunct 3 , 147.Xr isspace 3 , 148.Xr isupper 3 , 149.Xr iswctype 3 , 150.Xr isxdigit 3 , 151.Xr newlocale 3 , 152.Xr setlocale 3 , 153.Xr towlower 3 154.Sh STANDARDS 155The one-argument functions conform to 156.St -isoC-99 , 157the two-argument functions to 158.St -p1003.1-2008 . 159.Sh CAVEATS 160The argument 161.Fa wc 162must be 163.Dv WEOF 164or a valid 165.Fa wchar_t 166value with the current locale; otherwise, the result is undefined. 167