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iswxdigit(3) Library Functions Manual iswxdigit(3)
iswxdigit - test for hexadecimal digit wide character
Standard C library (libc, -lc)
#include <wctype.h> int iswxdigit(wint_t wc);
The iswxdigit() function is the wide-character equivalent of the isxdigit(3) function. It tests whether wc is a wide character belonging 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- character class "xdigit" is disjoint from the wide-character class "cntrl". Being a subclass of the wide-character class "graph", the wide- character 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- character 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'.
The iswxdigit() function returns nonzero if wc is a wide character belonging to the wide-character class "xdigit". Otherwise, it returns zero.
For an explanation of the terms used in this section, see attributes(7). ┌──────────────────────────────┬───────────────┬────────────────┐ │ Interface │ Attribute │ Value │ ├──────────────────────────────┼───────────────┼────────────────┤ │ iswxdigit() │ Thread safety │ MT-Safe locale │ └──────────────────────────────┴───────────────┴────────────────┘
C11, POSIX.1-2008.
POSIX.1-2001, C99.
The behavior of iswxdigit() depends on the LC_CTYPE category of the current locale.
iswctype(3), isxdigit(3)
Linux man-pages (unreleased) (date) iswxdigit(3)
Pages that refer to this page: isalpha(3), iswctype(3)