1/*	$OpenBSD: wcio.h,v 1.2 2013/04/17 17:40:35 tedu Exp $	*/
2/* $NetBSD: wcio.h,v 1.3 2003/01/18 11:30:00 thorpej Exp $ */
3
4/*-
5 * Copyright (c)2001 Citrus Project,
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $Citrus$
30 */
31
32#ifndef _WCIO_H_
33#define _WCIO_H_
34
35/* minimal requirement of SUSv2 */
36#define WCIO_UNGETWC_BUFSIZE 1
37
38struct wchar_io_data {
39	mbstate_t wcio_mbstate_in;
40	mbstate_t wcio_mbstate_out;
41
42	wchar_t wcio_ungetwc_buf[WCIO_UNGETWC_BUFSIZE];
43	size_t wcio_ungetwc_inbuf;
44
45	int wcio_mode; /* orientation */
46};
47
48#define WCIO_GET(fp) \
49	(_EXT(fp) ? &(_EXT(fp)->_wcio) : (struct wchar_io_data *)0)
50
51#define _SET_ORIENTATION(fp, mode) \
52do {\
53	struct wchar_io_data *_wcio = WCIO_GET(fp); \
54	if (_wcio && _wcio->wcio_mode == 0) \
55		_wcio->wcio_mode = (mode);\
56} while (0)
57
58/*
59 * WCIO_FREE should be called by fclose
60 */
61#define WCIO_FREE(fp) \
62do {\
63	struct wchar_io_data *_wcio = WCIO_GET(fp); \
64	if (_wcio) { \
65		_wcio->wcio_mode = 0;\
66		_wcio->wcio_ungetwc_inbuf = 0;\
67	} \
68} while (0)
69
70#define WCIO_FREEUB(fp) \
71do {\
72	struct wchar_io_data *_wcio = WCIO_GET(fp); \
73	if (_wcio) { \
74		_wcio->wcio_ungetwc_inbuf = 0;\
75	} \
76} while (0)
77
78#define WCIO_INIT(fp) \
79	memset(&(_EXT(fp)->_wcio), 0, sizeof(struct wchar_io_data))
80
81#endif /*_WCIO_H_*/
82