/*	$OpenBSD: wcio.h,v 1.1 2005/06/17 20:40:32 espie Exp $	*/

/* $NetBSD: wcio.h,v 1.3 2003/01/18 11:30:00 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.

 *

 * $Citrus$

 */

#ifndef _WCIO_H_

#define _WCIO_H_

/* minimal requirement of SUSv2 */

#define WCIO_UNGETWC_BUFSIZE 1

struct wchar_io_data {

	mbstate_t wcio_mbstate_in;

	mbstate_t wcio_mbstate_out;

	wchar_t wcio_ungetwc_buf[WCIO_UNGETWC_BUFSIZE];

	size_t wcio_ungetwc_inbuf;

	int wcio_mode; /* orientation */

};

#define WCIO_GET(fp) \

	(_EXT(fp) ? &(_EXT(fp)->_wcio) : (struct wchar_io_data *)0)

#define WCIO_GET_NONULL(fp) \

	(&(_EXT(fp)->_wcio))

#define _SET_ORIENTATION(fp, mode) \

do {\

	struct wchar_io_data *_wcio = WCIO_GET(fp); \

	if (_wcio && _wcio->wcio_mode == 0) \

		_wcio->wcio_mode = (mode);\

} while (0)

/*

 * WCIO_FREE should be called by fclose

 */

#define WCIO_FREE(fp) \

do {\

	struct wchar_io_data *_wcio = WCIO_GET(fp); \

	if (_wcio) { \

		_wcio->wcio_mode = 0;\

		_wcio->wcio_ungetwc_inbuf = 0;\

	} \

} while (0)

#define WCIO_FREEUB(fp) \

do {\

	struct wchar_io_data *_wcio = WCIO_GET(fp); \

	if (_wcio) { \

		_wcio->wcio_ungetwc_inbuf = 0;\

	} \

} while (0)

#define WCIO_INIT(fp) \

	memset(WCIO_GET_NONULL(fp), 0, sizeof(struct wchar_io_data))

#endif /*_WCIO_H_*/