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