iswalnum

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
       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 charac-
       ter class "alnum" is disjoint from the wide character class "cntrl".

       Being a subclass of the wide character class "graph", the wide  charac-
       ter 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 charac-
       ter 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  cur-
       rent locale.



GNU                               1999-07-25                       ISWALNUM(3)