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



NAME
       iswalnum - test for alphanumeric wide character

SYNOPSIS
       #include <&lt;wctype.h>&gt;

       int iswalnum(wint_t wc);

DESCRIPTION
       The  iswalnum()  function is the wide-character equivalent of the isal-
       num(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  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-char-
       acter 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 cur-
       rent locale.

SEE ALSO
       isalnum(3), iswctype(3)

COLOPHON
       This  page  is  part of release 3.05 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)