.\"	$NetBSD: fwide.3,v 1.5 2003/04/16 13:34:44 wiz Exp $
.\"
.\" Copyright (c)2001 Citrus Project,
.\" All rights reserved.
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.\" $Citrus: xpg4dl/FreeBSD/lib/libc/stdio/fwide.3,v 1.2 2001/12/07 04:47:08 yamt Exp $
.\"
.Dd October 24, 2001
.Dt FWIDE 3
.Os
.Sh NAME
.Nm fwide
.Nd get/set orientation of a stream
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In stdio.h
.In wchar.h
.Ft int
.Fn fwide "FILE *stream" "int mode"
.Sh DESCRIPTION
The
.Fn fwide
function
determines the orientation of the stream pointed at by
.Fa stream .
.Pp
If the orientation of
.Fa stream
has already been determined,
.Fn fwide
leaves it unchanged.
Otherwise,
.Fn fwide
sets the orientation of
.Fa stream
according to
.Fa mode .
.Pp
If
.Fa mode
is less than zero,
.Fa stream
is set to byte-oriented.
If it is greater than zero,
.Fa stream
is set to wide-oriented.
Otherwise,
.Fa mode
is zero, and
.Fa stream
is unchanged.
.Sh RETURN VALUES
.Fn fwide
returns a value according to orientation after the call of
.Fn fwide ;
a value less than zero if byte-oriented, a value greater than zero
if wide-oriented, and zero if the stream has no orientation.
.Sh SEE ALSO
.Xr ferror 3 ,
.Xr fgetc 3 ,
.Xr fgetwc 3 ,
.Xr fopen 3 ,
.Xr fputc 3 ,
.Xr fputwc 3 ,
.Xr freopen 3 ,
.Xr stdio 3
.Sh STANDARDS
The
.Fn fwide
function
conforms to
.St -isoC99 .