OpenSolaris_b135/lib/libcurses/screen/ungetwch.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*  Copyright (c) 1988 AT&T */
/*    All Rights Reserved   */


/*
 *      Copyright (c) 1997, by Sun Microsystems, Inc.
 *      All rights reserved.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*LINTLIBRARY*/

#include	<sys/types.h>
#include	"curses_inc.h"

/*
 *	Push a process code back into the input stream
 */

int
ungetwch(wchar_t code)
{
	int	i, n;
	char	buf[CSMAX];

	n = _curs_wctomb(buf, code & TRIM);
	for (i = n - 1; i >= 0; --i)
		if (ungetch((unsigned char)buf[i]) == ERR) {
			/* remove inserted characters */
			for (i = i + 1; i < n; ++i)
				(void) tgetch(0);
			return (ERR);
		}

	return (OK);
}