.\" Copyright (c) Bruno Haible .\" .\" 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. .\" .\" 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 .\" ISO/IEC 9899:1999 .\" .TH TOWUPPER 3 "July 25, 1999" "GNU" "Linux Programmer's Manual" .SH NAME towupper \- convert a wide character to uppercase .SH SYNOPSIS .nf .B #include .sp .BI "wint_t towupper (wint_t " wc ); .fi .SH DESCRIPTION The \fBtowupper\fP function is the wide-character equivalent of the \fBtoupper\fP function. If \fIwc\fP is a wide character, it is converted to uppercase. Characters which do not have case are returned unchanged. If \fIwc\fP is WEOF, WEOF is returned. .SH "RETURN VALUE" The \fBtowupper\fP function returns the uppercase equivalent of \fIwc\fP, or WEOF if \fIwc\fP is WEOF. .SH "CONFORMING TO" ISO/ANSI C, UNIX98 .SH "SEE ALSO" .BR towlower "(3), " towctrans "(3), " iswupper (3) .SH NOTES The behaviour of \fBtowupper\fP depends on the 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.