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



NAME
       iswalnum - test for alphanumeric wide character

SYNOPSIS
       #include 

       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 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 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(3), iswctype(3)

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



GNU                                         1999-07-25                                ISWALNUM(3)