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 n stdlib.h .Ft size_t .Fo wcstombs .Fa "char *restrict s" .Fa "const wchar_t *restrict pwcs" .Fa "size_t n" .Fc n stdlib.h n 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.

p 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

o Vt size_t Pc Ns -1 . .Sh ERRORS The .Fn wcstombs function will fail if: l -tag -width Er t Bq Er EILSEQ An invalid wide character was encountered. t 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 .