3.16 iswalnum, iswalnum_l—alphanumeric wide character test

Synopsis

#include <wctype.h>
int iswalnum(wint_t c);

#include <wctype.h>
int iswalnum_l(wint_t c, locale_t locale);

Description
iswalnum is a function which classifies wide-character values that are alphanumeric.

iswalnum_l is like iswalnum but performs the check based on the locale specified by the locale object locale. If locale is LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined.

Returns
iswalnum, iswalnum_l return non-zero if c is a alphanumeric wide character.

Portability
iswalnum is C99. iswalnum_l is POSIX-1.2008.

No supporting OS subroutines are required.