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

NAME         top

       iswalnum - test for alphanumeric wide character

SYNOPSIS         top

       #include <wctype.h>

       int iswalnum(wint_t wc);

DESCRIPTION         top

       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 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         top

       The iswalnum() function returns nonzero if wc is a wide character belonging to
       the wide-character class "alnum".  Otherwise it returns zero.

CONFORMING TO         top

       C99.

NOTES         top

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

SEE ALSO         top

       isalnum(3), iswctype(3)

COLOPHON         top

       This page is part of release 3.32 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)

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