iswxdigit(3) Library Functions Manual iswxdigit(3)
NAME
iswxdigit - test for hexadecimal digit wide character
LIBRARY
Standard C library (libc, -lc)
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 be-
longing 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 │
└─────────────────────────────────────┴───────────────┴────────────────┘
STANDARDS
C11, POSIX.1-2008.
HISTORY
POSIX.1-2001, C99.
NOTES
The behavior of iswxdigit() depends on the LC_CTYPE category of the cur-
rent locale.
SEE ALSO
iswctype(3), isxdigit(3)
Linux man-pages 6.9.1 2024-05-02 iswxdigit(3)
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