3.20 iswdigit—decimal digit wide character test

Synopsis

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

Description
iswdigit is a function which classifies wide-character values that are decimal digits.

Returns
iswdigit returns non-zero if c is a decimal digit wide character.

Portability
iswdigit is C99.

No supporting OS subroutines are required.