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/* $OpenBSD: fwide.c,v 1.6 2019/12/03 05:03:37 asou Exp $ */
/* $NetBSD: fwide.c,v 1.2 2003/01/18 11:29:54 thorpej 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.
*
* $Citrus$
*/
#include <stdio.h>
#include <wchar.h>
#include "local.h"
int
fwide(FILE *fp, int mode)
{
struct wchar_io_data *wcio;
/*
* this implementation use only -1, 0, 1
* for mode value.
* (we don't need to do this, but
* this can make things simpler.)
*/
if (mode > 0)
mode = 1;
else if (mode < 0)
mode = -1;
FLOCKFILE(fp);
wcio = WCIO_GET(fp);
if (!wcio) {
FUNLOCKFILE(fp);
return 0; /* XXX */
}
if (wcio->wcio_mode == 0 && mode != 0)
wcio->wcio_mode = mode;
else
mode = wcio->wcio_mode;
FUNLOCKFILE(fp);
return mode;
}
DEF_STRONG(fwide);
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