iswalnum—alphanumeric wide character test #include <wctype.h>
int iswalnum(wint_t c);
Description
iswalnum is a function which classifies wide-character values that
are alphanumeric.
Returns
iswalnum returns non-zero if c is a alphanumeric wide character.
Portability
iswalnum is C99.
No supporting OS subroutines are required.