1.\" $NetBSD: toupper.3,v 1.5 1997/05/31 21:34:27 kleink Exp $ 2.\" 3.\" Copyright (c) 1989, 1991 The Regents of the University of California. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to Berkeley by 7.\" the American National Standards Committee X3, on Information 8.\" Processing Systems. 9.\" 10.\" Redistribution and use in source and binary forms, with or without 11.\" modification, are permitted provided that the following conditions 12.\" are met: 13.\" 1. Redistributions of source code must retain the above copyright 14.\" notice, this list of conditions and the following disclaimer. 15.\" 2. Redistributions in binary form must reproduce the above copyright 16.\" notice, this list of conditions and the following disclaimer in the 17.\" documentation and/or other materials provided with the distribution. 18.\" 3. All advertising materials mentioning features or use of this software 19.\" must display the following acknowledgement: 20.\" This product includes software developed by the University of 21.\" California, Berkeley and its contributors. 22.\" 4. Neither the name of the University nor the names of its contributors 23.\" may be used to endorse or promote products derived from this software 24.\" without specific prior written permission. 25.\" 26.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36.\" SUCH DAMAGE. 37.\" 38.\" @(#)toupper.3 5.2 (Berkeley) 6/29/91 39.\" 40.Dd June 29, 1991 41.Dt TOUPPER 3 42.Os 43.Sh NAME 44.Nm toupper 45.Nd lower case to upper case letter conversion 46.Sh SYNOPSIS 47.Fd #include <ctype.h> 48.Ft int 49.Fn toupper "int c" 50.Sh DESCRIPTION 51The 52.Fn toupper 53function converts a lower-case letter to the corresponding 54upper-case letter. 55.SH RETURN VALUES 56If the argument is a lower-case letter, the 57.Fn toupper 58function returns the corresponding upper-case letter if there is 59one; otherwise the argument is returned unchanged. 60.\" In the 61.\" .Em ``C'' 62.\" locale, 63.\" .Fn toupper 64.\" maps only the characters for which 65.\" .Xr islower 66.\" is true to the corresponding characters for which 67.\" .Xr isupper 68.\" is true. 69.Sh SEE ALSO 70.Xr isascii 3 , 71.Xr isalnum 3 , 72.Xr isalpha 3 , 73.Xr iscntrl 3 , 74.Xr isdigit 3 , 75.Xr isgraph 3 , 76.Xr islower 3 , 77.Xr isprint 3 , 78.Xr ispunct 3 , 79.Xr isspace 3 , 80.Xr isupper 3 , 81.Xr isxdigit 3 , 82.Xr toascii 3 , 83.Xr toupper 3 , 84.Xr stdio 3 , 85.Xr ascii 7 86.Sh STANDARDS 87The 88.Fn toupper 89function conforms to 90.St -ansiC . 91