.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
.\"
+.\" %%%LICENSE_START(GPLv2+_DOC_ONEPARA)
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 2 of
.\" the License, or (at your option) any later version.
+.\" %%%LICENSE_END
.\"
.\" References consulted:
.\" GNU glibc-2 source code and manual
.\" Dinkumware C library reference http://www.dinkumware.com/
-.\" OpenGroup's Single Unix specification http://www.UNIX-systems.org/online.html
+.\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
.\" ISO/IEC 9899:1999
.\"
-.TH ISWUPPER 3 1999-07-25 "GNU" "Linux Programmer's Manual"
+.TH ISWUPPER 3 2015-08-08 "GNU" "Linux Programmer's Manual"
.SH NAME
iswupper \- test for uppercase wide character
.SH SYNOPSIS
.BI "int iswupper(wint_t " wc );
.fi
.SH DESCRIPTION
-The \fBiswupper\fP() function is the wide-character equivalent of the
-\fBisupper\fP() function.
-It tests whether \fIwc\fP is a wide character
+The
+.BR iswupper ()
+function is the wide-character equivalent of the
+.BR isupper (3)
+function.
+It tests whether
+.I wc
+is a wide character
belonging to the wide-character class "upper".
.PP
The wide-character class "upper" is a subclass of the wide-character class
Being a subclass of the wide-character class "alpha", the wide-character class
"upper" is disjoint from the wide-character class "digit".
.PP
-The wide-character class "upper" contains at least those characters \fIwc\fP
-which are equal to \fItowupper(wc)\fP and different from \fItowlower(wc)\fP.
+The wide-character class "upper" contains at least those characters
+.I wc
+which are equal to
+.I towupper(wc)
+and different from
+.IR towlower(wc) .
.PP
-The wide-character class "upper" always contains at least the letters 'A'
-to 'Z'.
-.SH "RETURN VALUE"
-The \fBiswupper\fP() function returns non-zero if \fIwc\fP is a wide character
+The wide-character class "upper" always contains at least the
+letters \(aqA\(aq to \(aqZ\(aq.
+.SH RETURN VALUE
+The
+.BR iswupper ()
+function returns nonzero if
+.I wc
+is a wide character
belonging to the wide-character class "upper".
-Otherwise it returns zero.
-.SH "CONFORMING TO"
-C99.
-.SH "SEE ALSO"
-.BR isupper (3),
-.BR iswctype (3),
-.BR towupper (3)
+Otherwise, it returns zero.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lb lb lb
+l l l.
+Interface Attribute Value
+T{
+.BR iswupper ()
+T} Thread safety MT-Safe locale
+.TE
+.SH CONFORMING TO
+POSIX.1-2001, POSIX.1-2008, C99.
.SH NOTES
-The behaviour of \fBiswupper\fP() depends on the LC_CTYPE category of the
+The behavior of
+.BR iswupper ()
+depends on the
+.B LC_CTYPE
+category of the
current locale.
.PP
This function is not very appropriate for dealing with Unicode characters,
because Unicode knows about three cases: upper, lower and title case.
+.SH SEE ALSO
+.BR isupper (3),
+.BR iswctype (3),
+.BR towupper (3)