iswxdigit man page

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).

InterfaceAttributeValue
iswxdigit()Thread safetyMT-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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Referenced By

isalpha(3), iswctype(3).

2015-08-08 GNU Linux Programmer's Manual