1.\" Copyright (c) 1989, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the American National Standards Committee X3, on Information 6.\" Processing Systems. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 3. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)tolower.3 8.1 (Berkeley) 6/4/93 33.\" 34.Dd October 3, 2002 35.Dt TOWLOWER 3 36.Os 37.Sh NAME 38.Nm towlower 39.Nd "upper case to lower case letter conversion (wide character version)" 40.Sh LIBRARY 41.Lb libc 42.Sh SYNOPSIS 43.In wctype.h 44.Ft wint_t 45.Fn towlower "wint_t wc" 46.Sh DESCRIPTION 47The 48.Fn towlower 49function converts an upper-case letter to the corresponding lower-case 50letter. 51.Sh RETURN VALUES 52If the argument is an upper-case letter, the 53.Fn towlower 54function returns the corresponding lower-case letter if there is 55one; otherwise the argument is returned unchanged. 56.Sh SEE ALSO 57.Xr iswlower 3 , 58.Xr tolower 3 , 59.Xr towupper 3 , 60.Xr wctrans 3 61.Sh STANDARDS 62The 63.Fn towlower 64function conforms to 65.St -isoC-99 . 66