1.\" Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved. 2.\" Copyright (c) 1993 3.\" The Regents of the University of California. All rights reserved. 4.\" 5.\" This code is derived from software contributed to Berkeley by 6.\" Donn Seeley of BSDI. 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.\" From @(#)multibyte.3 8.1 (Berkeley) 6/4/93 33.\" From FreeBSD: src/lib/libc/locale/multibyte.3,v 1.22 2003/11/08 03:23:11 tjr Exp 34.\" $FreeBSD$ 35.\" 36.Dd April 8, 2004 37.Dt WCTOMB 3 38.Os 39.Sh NAME 40.Nm wctomb 41.Nd convert a wide-character code to a character 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.In stdlib.h 46.Ft int 47.Fn wctomb "char *mbchar" "wchar_t wchar" 48.Sh DESCRIPTION 49The 50.Fn wctomb 51function converts a wide character 52.Fa wchar 53into a multibyte character and stores 54the result in 55.Fa mbchar . 56The object pointed to by 57.Fa mbchar 58must be large enough to accommodate the multibyte character, which 59may be up to 60.Dv MB_LEN_MAX 61bytes. 62.Pp 63A call with a null 64.Fa mbchar 65pointer returns nonzero if the current locale requires shift states, 66zero otherwise; 67if shift states are required, the shift state is reset to the initial state. 68.Sh RETURN VALUES 69If 70.Fa mbchar 71is 72.Dv NULL , 73the 74.Fn wctomb 75function returns nonzero if shift states are supported, 76zero otherwise. 77If 78.Fa mbchar 79is valid, 80.Fn wctomb 81returns 82the number of bytes processed in 83.Fa mbchar , 84or \-1 if no multibyte character 85could be recognized or converted. 86In this case, 87.Fn wctomb Ns 's 88internal conversion state is undefined. 89.Sh ERRORS 90The 91.Fn wctomb 92function will fail if: 93.Bl -tag -width Er 94.It Bq Er EILSEQ 95An invalid multibyte sequence was detected. 96.It Bq Er EINVAL 97The internal conversion state is invalid. 98.El 99.Sh SEE ALSO 100.Xr mbtowc 3 , 101.Xr wcrtomb 3 , 102.Xr wcstombs 3 , 103.Xr wctob 3 104.Sh STANDARDS 105The 106.Fn wctomb 107function conforms to 108.St -isoC-99 . 109