1.\" $OpenBSD: towlower.3,v 1.4 2010/09/10 18:38:19 jmc Exp $ 2.\" $NetBSD: towlower.3,v 1.7 2003/09/08 17:54:31 wiz Exp $ 3.\" 4.\" Copyright (c) 1989, 1991 The Regents of the University of California. 5.\" All rights reserved. 6.\" 7.\" This code is derived from software contributed to Berkeley by 8.\" the American National Standards Committee X3, on Information 9.\" Processing Systems. 10.\" 11.\" Redistribution and use in source and binary forms, with or without 12.\" modification, are permitted provided that the following conditions 13.\" are met: 14.\" 1. Redistributions of source code must retain the above copyright 15.\" notice, this list of conditions and the following disclaimer. 16.\" 2. Redistributions in binary form must reproduce the above copyright 17.\" notice, this list of conditions and the following disclaimer in the 18.\" documentation and/or other materials provided with the distribution. 19.\" 3. Neither the name of the University nor the names of its contributors 20.\" may be used to endorse or promote products derived from this software 21.\" without specific prior written permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" @(#)tolower.3 5.2 (Berkeley) 6/29/91 36.\" 37.Dd $Mdocdate: September 10 2010 $ 38.Dt TOWLOWER 3 39.Os 40.Sh NAME 41.Nm towlower 42.Nd wide-character case letter conversion utilities 43.Sh SYNOPSIS 44.In wctype.h 45.Ft wint_t 46.Fn towlower "wint_t wc" 47.Ft wint_t 48.Fn towupper "wint_t wc" 49.Sh DESCRIPTION 50The 51.Fn towlower 52function converts an upper-case wide character to the corresponding lower-case 53letter. 54The 55.Fn towupper 56function converts an lower-case wide character to the corresponding upper-case 57letter. 58.Sh RETURN VALUES 59If the argument is an upper/lower-case letter, the 60.Fn tolower 61function returns the corresponding counterpart if there is 62one; otherwise the argument is returned unchanged. 63.Sh SEE ALSO 64.Xr tolower 3 , 65.Xr toupper 3 66.Sh STANDARDS 67The functions conform to 68.St -isoC-amd1 69and 70.St -isoC-99 . 71