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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.