wcstombs.3   [plain text]


.\" Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
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.\" From @(#)multibyte.3	8.1 (Berkeley) 6/4/93
.\" From FreeBSD: src/lib/libc/locale/multibyte.3,v 1.22 2003/11/08 03:23:11 tjr Exp
.\" $FreeBSD: src/lib/libc/locale/wcstombs.3,v 1.5 2007/01/09 00:28:01 imp Exp $
.\"
.Dd April 8, 2004
.Dt WCSTOMBS 3
.Os
.Sh NAME
.Nm wcstombs ,
.Nm wcstombs_l
.Nd convert a wide-character string to a character string
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In stdlib.h
.Ft size_t
.Fo wcstombs
.Fa "char *restrict s"
.Fa "const wchar_t *restrict pwcs"
.Fa "size_t n"
.Fc
.In stdlib.h
.In xlocale.h
.Ft size_t
.Fo wcstombs_l
.Fa "char *restrict s"
.Fa "const wchar_t *restrict pwcs"
.Fa "size_t n"
.Fa "locale_t loc"
.Fc
.Sh DESCRIPTION
The
.Fn wcstombs
function converts a wide character string
.Fa pwcs
into a multibyte character string,
.Fa s ,
beginning in the initial conversion state.
Up to
.Fa n
bytes are stored in
.Fa s .
Partial multibyte characters at the end of the string are not stored.
The multibyte character string is null terminated, if there is room.
.Pp
Although the
.Fn wcstombs
function uses the current locale, the
.Fn wcstombs_l
function may be passed a locale directly. See
.Xr xlocale 3
for more information.
.Sh RETURN VALUES
The
.Fn wcstombs
function returns the number of bytes converted
(not including any terminating null), if successful;
otherwise, it returns
.Po Vt size_t Pc Ns \-1 .
.Sh ERRORS
The
.Fn wcstombs
function will fail if:
.Bl -tag -width Er
.It Bq Er EILSEQ
An invalid wide character was encountered.
.It Bq Er EINVAL
The conversion state is invalid.
.El
.Sh SEE ALSO
.Xr mbstowcs 3 ,
.Xr multibyte 3 ,
.Xr wcsrtombs 3 ,
.Xr wctomb 3 ,
.Xr xlocale 3
.Sh STANDARDS
The
.Fn wcstombs
function conforms to
.St -isoC-99 .