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 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-charac-
       ter class "cntrl".

       Being a subclass of the wide-character class "graph", the wide-character class "alnum" is disjoint from the  wide-charac-
       ter 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 con-
       tains 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 nonzero if wc is a wide character belonging to the wide-character class "alnum".   Other-
       wise 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 3.25 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/.



GNU                                                        1999-07-25                                                ISWALNUM(3)