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Man Pages


Manual Reference Pages  -  ISWCTYPE (3)

NAME

iswctype, wctype - wide character class functions

CONTENTS

Library
Synopsis
Description
Return Values
Examples
See Also
Standards
History

LIBRARY


.Lb libc

SYNOPSIS


.In wctype.h int iswctype wint_t wc wctype_t charclass wctype_t wctype const char *property

DESCRIPTION

The 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 iswctype.

The following character class names are recognised:
alnum  cntrl   ideogram        print   space   xdigit
alpha digit   lower   punct   special
blank graph   phonogram       rune    upper
 

The iswctype function checks whether the wide character wc is in the character class charclass.

RETURN VALUES

The iswctype function returns non-zero if and only if wc has the property described by charclass, or charclass is zero.

The wctype function returns 0 if property is invalid, otherwise it returns a value of type
.Vt wctype_t that can be used in subsequent calls to iswctype.

EXAMPLES

Reimplement iswalpha(3) in terms of iswctype and wctype:
int
myiswalpha(wint_t wc)
{
        return (iswctype(wc, wctype("alpha")));
}

SEE ALSO

ctype(3), nextwctype(3)

STANDARDS

The iswctype and wctype functions conform to -p1003.1-2001. The "ideogram", "phonogram", "special", and "rune" character classes are extensions.

HISTORY

The iswctype and wctype functions first appeared in
.Fx 5.0 .
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