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ISWALNUM(3)                Linux Programmer's Manual               ISWALNUM(3)



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(3) function.  It tests whether wc is a
       wide character 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  sub-
       class 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
       C99.

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

SEE ALSO
       isalnum(3), iswctype(3)

COLOPHON
       This page is part of release 3.22 of the Linux man-pages project.  A description of the project,  and  informa-
       tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



GNU                               1999-07-25                       ISWALNUM(3)