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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON |
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ISWXDIGIT(3) Linux Programmer's Manual ISWXDIGIT(3)
iswxdigit - test for hexadecimal digit wide character
#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)
This page is part of release 4.15 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
GNU 2015-08-08 ISWXDIGIT(3)
Pages that refer to this page: isalpha(3), iswctype(3)
Copyright and license for this manual page
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