ISWXDIGIT
Section: Linux Programmer's Manual (3)
Updated: 2015-08-08
Page Index
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
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'.
RETURN VALUE
The
iswxdigit()
function returns nonzero if
wc
is a wide character
belonging to the wide-character class "xdigit".
Otherwise, it returns zero.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
iswxdigit()
| Thread safety | MT-Safe locale
|
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C99.
NOTES
The behavior of
iswxdigit()
depends on the
LC_CTYPE
category of the
current locale.
SEE ALSO
iswctype(3),
isxdigit(3)
COLOPHON
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