Libc-825.24.tar.gz

[apple/libc.git] / stdio / fwide.3

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-.\"    $NetBSD: fwide.3,v 1.3 2002/02/07 07:00:25 ross Exp $
-.\"
-.\" Copyright (c)2001 Citrus Project,
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\" $Citrus: xpg4dl/FreeBSD/lib/libc/stdio/fwide.3,v 1.2 2001/12/07 04:47:08 yamt Exp $
-.\" $FreeBSD: src/lib/libc/stdio/fwide.3,v 1.3 2002/12/18 12:45:10 ru 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 be byte-oriented.
-If
-.Fa mode
-is greater than zero,
-.Fa stream
-is set to be wide-oriented.
-Otherwise,
-.Fa mode
-is zero, and
-.Fa stream
-is unchanged.
-.Sh RETURN VALUES
-The
-.Fn fwide
-function
-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 -isoC-99 .