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.