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.\" Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
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2003-12-07 06:33:52 +00:00
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.\" Copyright (c) 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Donn Seeley of BSDI.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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2017-02-28 23:42:47 +00:00
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.\" 3. Neither the name of the University nor the names of its contributors
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2003-12-07 06:33:52 +00:00
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" From @(#)multibyte.3 8.1 (Berkeley) 6/4/93
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.\" From FreeBSD: src/lib/libc/locale/multibyte.3,v 1.22 2003/11/08 03:23:11 tjr Exp
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.\" $FreeBSD$
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.\"
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2004-04-08 09:59:02 +00:00
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.Dd April 8, 2004
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2003-12-07 06:33:52 +00:00
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.Dt MBSTOWCS 3
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.Os
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.Sh NAME
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.Nm mbstowcs
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.Nd convert a character string to a wide-character string
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In stdlib.h
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.Ft size_t
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.Fo mbstowcs
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.Fa "wchar_t * restrict wcstring" "const char * restrict mbstring"
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.Fa "size_t nwchars"
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.Fc
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.Sh DESCRIPTION
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The
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.Fn mbstowcs
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function converts a multibyte character string
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.Fa mbstring
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beginning in the initial conversion state
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into a wide character string
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.Fa wcstring .
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No more than
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.Fa nwchars
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wide characters are stored.
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A terminating null wide character is appended if there is room.
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.Sh RETURN VALUES
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The
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.Fn mbstowcs
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function returns the number of wide characters converted,
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not counting any terminating null wide character, or \-1
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if an invalid multibyte character was encountered.
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.Sh ERRORS
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The
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.Fn mbstowcs
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function will fail if:
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.Bl -tag -width Er
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.It Bq Er EILSEQ
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An invalid multibyte sequence was detected.
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.It Bq Er EINVAL
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The conversion state is invalid.
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.El
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.Sh SEE ALSO
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2004-04-08 09:59:02 +00:00
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.Xr mbsrtowcs 3 ,
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2004-07-04 20:55:50 +00:00
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.Xr mbtowc 3 ,
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.Xr multibyte 3
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.Sh STANDARDS
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The
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.Fn mbstowcs
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function conforms to
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.St -isoC-99 .
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