iswdigit — test for decimal digit wide character
#include <wctype.h>
int
iswdigit( |
wint_t | wc) ; |
The iswdigit
() function is
the wide-character equivalent of the isdigit(3) function. It
tests whether wc
is a
wide character belonging to the wide-character class
"digit".
The wide-character class "digit" is a subclass of the wide-character class "xdigit", and therefore also a subclass of the wide-character class "alnum", of the wide-character class "graph" and of the wide-character class "print".
Being a subclass of the wide character class "print", the wide-character class "digit" is disjoint from the wide-character class "cntrl".
Being a subclass of the wide-character class "graph", the wide-character class "digit" is disjoint from the wide-character class "space" and its subclass "blank".
Being a subclass of the wide-character class "alnum", the wide-character class "digit" is disjoint from the wide-character class "punct".
The wide-character class "digit" is disjoint from the wide-character class "alpha" and therefore also disjoint from its subclasses "lower", "upper".
The wide-character class "digit" always contains exactly the digits '0' to '9'.
The iswdigit
() function
returns non-zero if wc
is a wide character
belonging to the wide-character class "digit". Otherwise it
returns zero.
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