NAME

iswalnum — test for an alphanumeric wide-character code

SYNOPSIS

#include <wctype.h>

int iswalnum(wint_t wc);

DESCRIPTION

The iswalnum() function tests whether wc is a wide-character code representing a character of class alpha or digit in the program's current locale, see the XBD specification, Locale .

In all cases wc is a wint_t, the value of which must be a wide-character code corresponding to a valid character in the current locale or must equal the value of the macro WEOF. If the argument has any other value, the behaviour is undefined.

RETURN VALUE

The iswalnum() function returns non-zero if wc is an alphanumeric wide-character code; otherwise it returns 0.

ERRORS

No errors are defined.

EXAMPLES

None.

APPLICATION USAGE

To ensure applications portability, especially across natural languages, only this function and those listed in the SEE ALSO section should be used for classification of wide-character codes.

FUTURE DIRECTIONS

None.

SEE ALSO

iswalpha(3) , iswcntrl(3) , iswdigit(3) , iswgraph(3) , iswlower(3) , iswprint(3) , iswpunct(3) , iswspace(3) , iswupper(3) , iswxdigit(3) , setlocale(3) , <wctype.h> , <wchar.h> , <stdio.h> , the XBD specification, Locale .