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ISWXDIGIT(3) Linux Programmer's Manual ISWXDIGIT(3) NAME iswxdigit - test for hexadecimal digit wide character SYNOPSIS #include <wctype.h> int iswxdigit(wint_t wc); DESCRIPTION The iswxdigit() function is the wide-character equivalent of the isxdigit(3) function. It tests whether wc is a wide character belong- ing to the wide-character class "xdigit". The wide-character class "xdigit" is a subclass of the wide-character class "alnum", and therefore also a subclass 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 "xdigit" is disjoint from the wide-character class "cntrl". Being a subclass of the wide-character class "graph", the wide-charac- ter class "xdigit" 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 "xdigit" is disjoint from the wide-character class "punct". The wide-character class "xdigit" always contains at least the letters 'A' to 'F', 'a' to 'f' and the digits '0' to '9'. RETURN VALUE The iswxdigit() function returns non-zero if wc is a wide character belonging to the wide-character class "xdigit". Otherwise it returns zero. CONFORMING TO C99. NOTES The behavior of iswxdigit() depends on the LC_CTYPE category of the current locale. SEE ALSO iswctype(3), isxdigit(3) GNU 1999-07-25 ISWXDIGIT(3)