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Manual Pages  — WCTYPE

NAME

iswctype – wide character class functions

CONTENTS

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <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 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 Ta cntrl Ta ideogram Ta print Ta space xdigit
alpha Ta digit Ta lower Ta punct special
blank Ta graph Ta phonogram Ta 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 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 IEEE Std 1003.1-2001 ("POSIX.1"). The "ideogram", "phonogram", "special", and "rune" character classes are extensions.

HISTORY

The iswctype() and wctype() functions first appeared in FreeBSD 5.0 .

WCTYPE (3) March 27, 2004

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