NAME

       iswupper - test for uppercase wide character

SYNOPSIS

       #include <wctype.h>

       int iswupper (wint_t wc);

DESCRIPTION

       The  iswupper function is the wide-character equivalent of the isupper function. It tests whether wc is a
       wide character belonging to the wide character class "upper".

       The wide character class "upper" is a subclass of the wide character class "alpha", and therefore also  a
       subclass  of  the  wide  character  class  "alnum",  of  the wide character class "graph" and of the wide
       character class "print".

       Being a subclass of the wide character class "print", the wide character class "upper" is  disjoint  from
       the wide character class "cntrl".

       Being  a  subclass of the wide character class "graph", the wide character class "upper" is disjoint from
       the wide character class "space" and its subclass "blank".

       Being a subclass of the wide character class "alnum", the wide character class "upper" is  disjoint  from
       the wide character class "punct".

       Being  a  subclass of the wide character class "alpha", the wide character class "upper" is disjoint from
       the wide character class "digit".

       The wide character class "upper" contains at least those characters wc which are  equal  to  towupper(wc)
       and different from towlower(wc).

       The wide character class "upper" always contains at least the letters 'A' to 'Z'.

RETURN VALUE

       The  iswupper  function  returns non-zero if wc is a wide character belonging to the wide character class
       "upper". Otherwise it returns zero.

CONFORMING TO

       ISO/ANSI C, UNIX98

SEE ALSO

       isupper(3), iswctype(3), towupper(3)

NOTES

       The behaviour of iswupper depends on the LC_CTYPE category of the current locale.

       This function is not very appropriate for dealing with Unicode characters, because  Unicode  knows  about
       three cases: upper, lower and title case.

GNU                                               July 25, 1999                                      ISWUPPER(3)