/*
 * 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) 1995-1998 by Sun Microsystems, Inc.
 * All rights reserved.
 */

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

/* LINTLIBRARY */

/*
 * dupwin.c
 *
 * XCurses Library
 *
 * Copyright 1990, 1995 by Mortice Kern Systems Inc.  All rights reserved.
 *
 */

#ifdef M_RCSID
#ifndef lint
static char rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/dupwin.c 1.1 "
"1995/05/26 18:41:41 ant Exp $";
#endif
#endif

#include <private.h>
#include <stdlib.h>
#include <string.h>

/*
 * Make an exact duplicate of the window.
 */
WINDOW *
dupwin(WINDOW *w)
{
	int	i;
	WINDOW	*v;

	/* Create (sub)window with same dimensions. */
	v = __m_newwin(w->_parent, w->_maxy, w->_maxx, w->_begy, w->_begx);
	if (v == NULL)
		return (NULL);

	/* Same software scroll region. */
	v->_top = w->_top;
	v->_bottom = w->_bottom;

	/* Same window input settings. */
	v->_vmin = w->_vmin;
	v->_vtime = w->_vtime;

	/* Same window flags. */
	v->_flags = w->_flags;

	/* Copy dirty region markers. */
	(void) memcpy(v->_first, w->_first,
		(v->_maxy + v->_maxy) * sizeof (*v->_first));

	if (v->_parent == NULL) {
		/*
		 * For a regular window, copy source window lines in the
		 * correct order, because the pointers in _line[] may have
		 * been shuffled.  A subwindow is not subject to this,
		 * because it shares its data with its parent window.
		 */
		for (i = 0; i < w->_maxy; ++i) {
			(void) memcpy(v->_line[i], w->_line[i],
				v->_maxx * sizeof (**v->_line));
		}
	}

	return (v);
}