1.\" $NetBSD: towlower.3,v 1.7 2003/09/08 17:54:31 wiz 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. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)tolower.3 5.2 (Berkeley) 6/29/91 35.\" 36.Dd December 22, 2000 37.Dt TOWLOWER 3 38.Os 39.Sh NAME 40.Nm towlower 41.Nd wide character case letter conversion utilities 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.In wctype.h 46.Ft wint_t 47.Fn towlower "wint_t wc" 48.Ft wint_t 49.Fn towupper "wint_t wc" 50.Sh DESCRIPTION 51The 52.Fn towlower 53function converts an upper-case wide character to the corresponding lower-case 54letter. 55The 56.Fn towupper 57function converts an lower-case wide character to the corresponding upper-case 58letter. 59.Sh RETURN VALUES 60If the argument is an upper/lower-case letter, the 61.Fn tolower 62function returns the corresponding counterpart if there is 63one; otherwise the argument is returned unchanged. 64.Sh SEE ALSO 65.Xr tolower 3 , 66.Xr toupper 3 67.Sh STANDARDS 68The functions conform to 69.St -isoC-99 . 70