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