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.\" 35.Dd April 8, 2004 36.Dt WCSTOMBS 3 37.Os 38.Sh NAME 39.Nm wcstombs 40.Nd convert a wide-character string to a character string 41.Sh LIBRARY 42.Lb libc 43.Sh SYNOPSIS 44.In stdlib.h 45.Ft size_t 46.Fo wcstombs 47.Fa "char * restrict mbstring" "const wchar_t * restrict wcstring" 48.Fa "size_t nbytes" 49.Fc 50.Sh DESCRIPTION 51The 52.Fn wcstombs 53function converts a wide character string 54.Fa wcstring 55into a multibyte character string, 56.Fa mbstring , 57beginning in the initial conversion state. 58Up to 59.Fa nbytes 60bytes are stored in 61.Fa mbstring . 62Partial multibyte characters at the end of the string are not stored. 63The multibyte character string is null terminated if there is room. 64.Sh RETURN VALUES 65The 66.Fn wcstombs 67function returns the number of bytes converted 68(not including any terminating null), if successful, otherwise it returns 69.Po Vt size_t Pc Ns \-1 . 70.Sh ERRORS 71The 72.Fn wcstombs 73function will fail if: 74.Bl -tag -width Er 75.It Bq Er EILSEQ 76An invalid wide character was encountered. 77.It Bq Er EINVAL 78The conversion state is invalid. 79.El 80.Sh SEE ALSO 81.Xr mbstowcs 3 , 82.Xr multibyte 3 , 83.Xr wcsrtombs 3 , 84.Xr wctomb 3 85.Sh STANDARDS 86The 87.Fn wcstombs 88function conforms to 89.St -isoC-99 . 90