iswalnum - phpMan

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  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)

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