NAME
iswdigit - test for decimal digit wide character SYNOPSIS
#include
int iswdigit(wintt wc); DESCRIPTION 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-charac‐
ter class "digit" is disjoint from the wide-character class "cntrl".
Being a subclass of the wide-character class "graph", the wide-charac‐
ter 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-charac‐
ter 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'. RETURN VALUE The iswdigit() function returns nonzero if wc is a wide character
belonging to the wide-character class "digit". Otherwise it returns zero. CONFORMING TO C99. NOTES The behavior of iswdigit() depends on the LCCTYPE category of the cur‐ rent locale. SEE ALSO isdigit(3), iswctype(3) COLOPHON
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GNU 1999-07-25 ISWDIGIT(3)