Chapter Contents
Previous
Next
iswalnum

iswalnum


Alphanumeric Wide Character Test

Portability: ISO/ANSI conforming, UNIX compatible

SYNOPSIS
DESCRIPTION
RETURN VALUE
CAUTION
RELATED FUNCTIONS
SEE ALSO

SYNOPSIS

#include <wctype.h>

int iswalnum(wint_t wc)

DESCRIPTION

iswalnum tests a wide character value wc to determine whether it is an alphabetic character (uppercase or lowercase) or a numeric character. Specifically, iswalnum checks whether iswalpha or iswdigit is true for wc.

RETURN VALUE

iswalnum returns 0 if the wide character is not alphanumeric, or a nonzero value if it is alphanumeric. If the argument is WEOF (Wide End Of File macro), 0 is returned.

CAUTION

The effect of iswalnum on a non-wide character argument other than WEOF is undefined. Do not assume that iswalnum returns either a 0 or a 1.

RELATED FUNCTIONS

iswalpha, iswdigit

SEE ALSO


Chapter Contents
Previous
Next
Top of Page

Copyright © 2001 by SAS Institute Inc., Cary, NC, USA. All rights reserved.