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iswxdigit

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 non-zero if wc is a wide character belonging to the wide-character class "xdigit". Otherwise it returns zero.

CONFORMING TO

C99.

NOTES

The behavior of iswxdigit() depends on the LC_CTYPE category of the current locale.

SEE ALSO

iswctype(3), isxdigit(3)

COLOPHON

This page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.