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 |
POSIX.1-2001, POSIX.1-2008, C99.
The behavior of
iswxdigit() depends on the
LC_CTYPE category of
the current locale.
iswctype(3),
isxdigit(3)