1.\" $OpenBSD: iswalnum.3,v 1.5 2013/06/05 03:39:22 tedu 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: June 5 2013 $ 38.Dt ISWALNUM 3 39.Os 40.Sh NAME 41.Nm iswalnum , 42.Nm iswalpha , 43.Nm iswblank , 44.Nm iswcntrl , 45.Nm iswdigit , 46.Nm iswgraph , 47.Nm iswlower , 48.Nm iswprint , 49.Nm iswpunct , 50.Nm iswspace , 51.Nm iswupper , 52.Nm iswxdigit 53.Nd wide-character classification utilities 54.Sh SYNOPSIS 55.In wctype.h 56.Ft int 57.Fn iswalnum "wint_t wc" 58.Ft int 59.Fn iswalpha "wint_t wc" 60.Ft int 61.Fn iswblank "wint_t wc" 62.Ft int 63.Fn iswcntrl "wint_t wc" 64.Ft int 65.Fn iswdigit "wint_t wc" 66.Ft int 67.Fn iswgraph "wint_t wc" 68.Ft int 69.Fn iswlower "wint_t wc" 70.Ft int 71.Fn iswprint "wint_t wc" 72.Ft int 73.Fn iswpunct "wint_t wc" 74.Ft int 75.Fn iswspace "wint_t wc" 76.Ft int 77.Fn iswupper "wint_t wc" 78.Ft int 79.Fn iswxdigit "wint_t wc" 80.Sh DESCRIPTION 81The functions are character classification utility functions, 82for use with wide characters 83.Po 84.Fa wchar_t 85or 86.Fa wint_t 87.Pc . 88See the description of singlebyte classification functions, like 89.Xr isalnum 3 , 90for details. 91.Sh RETURN VALUES 92The functions return zero if the character tests false and 93return non-zero if the character tests true. 94.Sh SEE ALSO 95.Xr isalnum 3 , 96.Xr isalpha 3 , 97.Xr isblank 3 , 98.Xr iscntrl 3 , 99.Xr isdigit 3 , 100.Xr isgraph 3 , 101.Xr islower 3 , 102.Xr isprint 3 , 103.Xr ispunct 3 , 104.Xr isspace 3 , 105.Xr isupper 3 , 106.Xr isxdigit 3 107.Sh STANDARDS 108The functions conform to 109.\" .St -isoC99 . 110ISO/IEC 9899:1999 111.Pq Dq ISO C99 . 112.Sh CAVEATS 113The argument to these functions must be 114.Dv WEOF 115or a valid 116.Fa wchar_t 117value with the current locale; otherwise, the result is undefined. 118.Sh BUGS 119In a UTF-8 locale these functions return wrong answers for some characters 120because they do not cover the entire Unicode character set. 121