ISWALNUM(M)         Linux Programmer's Manual         ISWALNUM(M)



NAME
       iswalnum - test for alphanumeric wide character

SYNOPSIS
       #include <wctype.h>

       int iswalnum(wint_t wc);

DESCRIPTION
       The  iswalnum function is the wide-character equivalent of
       the isalnum function. It tests whether wc is a wide  char-
       acter belonging to the wide character class "alnum".

       The wide character class "alnum" is a subclass of the wide
       character class "graph", and therefore also a subclass  of
       the wide character class "print".

       Being  a subclass of the wide character class "print", the
       wide character class "alnum" is  disjoint  from  the  wide
       character class "cntrl".

       Being  a subclass of the wide character class "graph", the
       wide character class "alnum" is  disjoint  from  the  wide
       character class "space" and its subclass "blank".

       The wide character class "alnum" is disjoint from the wide
       character class "punct".

       The wide character class "alnum" is the union of the  wide
       character  classes  "alpha"  and "digit". As such, it also
       contains the wide character class "xdigit".

       The wide character class "alnum" always contains at  least
       the  letters  'A' to 'Z', 'a' to 'z' and the digits '0' to
       '9'.

RETURN VALUE
       The iswalnum function returns non-zero if  wc  is  a  wide
       character  belonging  to the wide character class "alnum".
       Otherwise it returns zero.

CONFORMING TO
       ISO/ANSI C, UNIX98

SEE ALSO
       isalnum(m), iswctype(e)

NOTES
       The behaviour of iswalnum depends on the LC_CTYPE category
       of the current locale.



GNU                         1999-07-25                ISWALNUM(M)