suse man page for iswupper

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

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(3) 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 nonzero if wc is a wide character belonging to the wide-character  class  "upper".   Otherwise  it  returns
       zero.

CONFORMING TO
       C99.

NOTES
       The behavior 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.

SEE ALSO
       isupper(3), iswctype(3), towupper(3)

COLOPHON
       This page is part of release 3.25 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							       ISWUPPER(3)