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. All advertising materials mentioning features or use of this software 17.\" must display the following acknowledgement: 18.\" This product includes software developed by the University of 19.\" California, Berkeley and its contributors. 20.\" 4. Neither the name of the University nor the names of its contributors 21.\" may be used to endorse or promote products derived from this software 22.\" without specific prior written permission. 23.\" 24.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34.\" SUCH DAMAGE. 35.\" 36.\" From @(#)multibyte.3 8.1 (Berkeley) 6/4/93 37.\" From FreeBSD: src/lib/libc/locale/multibyte.3,v 1.22 2003/11/08 03:23:11 tjr Exp 38.\" $FreeBSD$ 39.\" 40.Dd April 8, 2004 41.Dt WCSTOMBS 3 42.Os 43.Sh NAME 44.Nm wcstombs 45.Nd convert a wide-character string to a character string 46.Sh LIBRARY 47.Lb libc 48.Sh SYNOPSIS 49.In stdlib.h 50.Ft size_t 51.Fo wcstombs 52.Fa "char * restrict mbstring" "const wchar_t * restrict wcstring" 53.Fa "size_t nbytes" 54.Fc 55.Sh DESCRIPTION 56The 57.Fn wcstombs 58function converts a wide character string 59.Fa wcstring 60into a multibyte character string, 61.Fa mbstring , 62beginning in the initial conversion state. 63Up to 64.Fa nbytes 65bytes are stored in 66.Fa mbstring . 67Partial multibyte characters at the end of the string are not stored. 68The multibyte character string is null terminated if there is room. 69.Sh RETURN VALUES 70The 71.Fn wcstombs 72function returns the number of bytes converted 73(not including any terminating null), if successful, otherwise it returns 74.Po Vt size_t Pc Ns \-1 . 75.Sh ERRORS 76The 77.Fn wcstombs 78function will fail if: 79.Bl -tag -width Er 80.It Bq Er EILSEQ 81An invalid wide character was encountered. 82.It Bq Er EINVAL 83The conversion state is invalid. 84.El 85.Sh SEE ALSO 86.Xr mbstowcs 3 , 87.Xr multibyte 3 , 88.Xr wcsrtombs 3 , 89.Xr wctomb 3 90.Sh STANDARDS 91The 92.Fn wcstombs 93function conforms to 94.St -isoC-99 . 95