1/*
2 * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
3 * Copyright (c) 2002 Tim J. Robbins.
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
28#include "lint.h"
29#include "mse_int.h"
30#include "file64.h"
31#include "mse.h"
32#include <errno.h>
33#include <stdio.h>
34#include <wchar.h>
35#include "mblocal.h"
36
37int
38fwide(FILE *fp, int mode)
39{
40	int m;
41	rmutex_t	*lk;
42
43	FLOCKFILE(lk, fp);
44	/* Only change the orientation if the stream is not oriented yet. */
45	m = _getorientation(fp);
46	if (mode != 0 && m == _NO_MODE)
47		_setorientation(fp, (mode > 0) ? _WC_MODE : _BYTE_MODE);
48	FUNLOCKFILE(lk);
49
50	switch (m) {
51	case _WC_MODE:
52		mode = 1;
53		break;
54	case _NO_MODE:
55		mode = 0;
56		break;
57	case _BYTE_MODE:
58		mode = -1;
59		break;
60	}
61
62	return (mode);
63}
64