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+.\" Copyright (c) 1989, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" the American National Standards Committee X3, on Information
+.\" Processing Systems.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)toupper.3	8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt TOUPPER 3
+.Os
+.Sh NAME
+.Nm toupper
+.Nd lower case to upper case letter conversion
+.Sh SYNOPSIS
+.Fd #include <ctype.h>
+.Ft int
+.Fn toupper "int c"
+.Sh DESCRIPTION
+The
+.Fn toupper
+function converts a lower-case letter to the corresponding 
+upper-case letter.
+.SH RETURN VALUES
+If the argument is a lower-case letter, the
+.Fn toupper
+function returns the corresponding upper-case letter if there is
+one; otherwise the argument is returned unchanged.
+.\" In the 
+.\" .Em ``C''
+.\" locale,
+.\" .Fn toupper
+.\" maps only the characters for which
+.\" .Xr islower
+.\" is true to the corresponding characters for which
+.\" .Xr isupper
+.\" is true.	
+.Sh SEE ALSO
+.Xr isascii 3 ,
+.Xr isalnum 3 ,
+.Xr isalpha 3 ,
+.Xr iscntrl 3 ,
+.Xr isdigit 3 ,
+.Xr isgraph 3 ,
+.Xr islower 3 ,
+.Xr isprint 3 ,
+.Xr ispunct 3 ,
+.Xr isspace 3 ,
+.Xr isupper 3 ,
+.Xr isxdigit 3 ,
+.Xr toascii 3 ,
+.Xr toupper 3 ,
+.Xr stdio 3
+.Xr ascii 7
+.Sh STANDARDS
+The
+.Fn tolower
+function conforms to
+.St -ansiC .