.\" Copyright (c) 2002 Tim J. Robbins .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $FreeBSD: src/lib/libc/locale/wctype.3,v 1.5 2004/03/27 08:59:21 tjr Exp $ .\" .Dd March 27, 2004 .Dt WCTYPE 3 .Os .Sh NAME .Nm iswctype , wctype .Nd "wide character class functions" .Sh LIBRARY .Lb libc .Sh SYNOPSIS .In wctype.h .Ft int .Fn iswctype "wint_t wc" "wctype_t charclass" .Ft wctype_t .Fn wctype "const char *property" .Sh DESCRIPTION The .Fn wctype function returns a value of type .Vt wctype_t which represents the requested wide character class and may be used as the second argument for calls to .Fn iswctype . .Pp The following character class names are recognised: .Bl -column -offset indent ".Li alnum" ".Li cntrl" ".Li ideogram" ".Li print" ".Li space" .It Li "alnum cntrl ideogram print space xdigit" .It Li "alpha digit lower punct special" .It Li "blank graph phonogram rune upper" .El .Pp The .Fn iswctype function checks whether the wide character .Fa wc is in the character class .Fa charclass . .Sh RETURN VALUES The .Fn iswctype function returns non-zero if and only if .Fa wc has the property described by .Fa charclass , or .Fa charclass is zero. .Pp The .Fn wctype function returns 0 if .Fa property is invalid, otherwise it returns a value of type .Vt wctype_t that can be used in subsequent calls to .Fn iswctype . .Sh EXAMPLES Reimplement .Xr iswalpha 3 in terms of .Fn iswctype and .Fn wctype : .Bd -literal -offset indent int myiswalpha(wint_t wc) { return (iswctype(wc, wctype("alpha"))); } .Ed .Sh SEE ALSO .Xr ctype 3 .Sh STANDARDS The .Fn iswctype and .Fn wctype functions conform to .St -p1003.1-2001 . The .Dq Li ideogram , .Dq Li phonogram .Dq Li special , and .Dq Li rune character classes are extensions. .Sh HISTORY The .Fn iswctype and .Fn wctype functions first appeared in .Fx 5.0 .