iswalnum, iswalnum_l—alphanumeric wide character testSynopsis
#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.