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1.\" $NetBSD: fwide.3,v 1.3 2002/02/07 07:00:25 ross Exp $
2.\"
3.\" Copyright (c)2001 Citrus Project,
4.\" All rights reserved.
5.\"
6.\" Redistribution and use in source and binary forms, with or without
7.\" modification, are permitted provided that the following conditions
8.\" are met:
9.\" 1. Redistributions of source code must retain the above copyright
10.\" notice, this list of conditions and the following disclaimer.
11.\" 2. Redistributions in binary form must reproduce the above copyright
12.\" notice, this list of conditions and the following disclaimer in the
13.\" documentation and/or other materials provided with the distribution.
14.\"
15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25.\" SUCH DAMAGE.
26.\"
27.\" $Citrus: xpg4dl/FreeBSD/lib/libc/stdio/fwide.3,v 1.2 2001/12/07 04:47:08 yamt Exp $
28.\" $FreeBSD: src/lib/libc/stdio/fwide.3,v 1.3 2002/12/18 12:45:10 ru Exp $
29.\"
30.Dd October 24, 2001
31.Dt FWIDE 3
32.Os
33.Sh NAME
34.Nm fwide
35.Nd get/set orientation of a stream
36.Sh LIBRARY
37.Lb libc
38.Sh SYNOPSIS
39.In stdio.h
40.In wchar.h
41.Ft int
42.Fn fwide "FILE *stream" "int mode"
43.Sh DESCRIPTION
44The
45.Fn fwide
46function
47determines the orientation of the stream pointed at by
48.Fa stream .
49.Pp
50If the orientation of
51.Fa stream
52has already been determined,
53.Fn fwide
54leaves it unchanged.
55Otherwise,
56.Fn fwide
57sets the orientation of
58.Fa stream
59according to
60.Fa mode .
61.Pp
62If
63.Fa mode
64is less than zero,
65.Fa stream
66is set to be byte-oriented.
67If
68.Fa mode
69is greater than zero,
70.Fa stream
71is set to be wide-oriented.
72Otherwise,
73.Fa mode
74is zero, and
75.Fa stream
76is unchanged.
77.Sh RETURN VALUES
78The
79.Fn fwide
80function
81returns a value according to orientation after the call of
82.Fn fwide ;
83a value less than zero if byte-oriented, a value greater than zero
84if wide-oriented, and zero if the stream has no orientation.
85.Sh SEE ALSO
86.Xr ferror 3 ,
87.Xr fgetc 3 ,
88.Xr fgetwc 3 ,
89.Xr fopen 3 ,
90.Xr fputc 3 ,
91.Xr fputwc 3 ,
92.Xr freopen 3 ,
93.Xr stdio 3
94.Sh STANDARDS
95The
96.Fn fwide
97function
98conforms to
99.St -isoC-99 .