OpenSolaris_b135/ucblib/libcurses/id_subwins.c

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/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

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

/*LINTLIBRARY*/

#ifndef lint
static char
sccsid[] = "@(#)id_subwins.c 1.3 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
#endif	/* not lint */

#include	"curses.ext"

/*
 * _id_subwins:
 *	Re-sync the pointers to _y for all the subwindows.
 */

void
_id_subwins(WINDOW *orig)
{
	WINDOW	*win;
	int	realy;
	int	y, oy;

	realy = orig->_begy + orig->_cury;
	for (win = orig->_nextp; win != orig; win = win->_nextp) {
		/*
		 * If the window ends before our current position,
		 * don't need to do anything.
		 */
		if (win->_begy + win->_maxy <= realy)
			continue;

		oy = orig->_cury;
		for (y = realy - win->_begy; y < win->_maxy; y++, oy++)
			win->_y[y] = &orig->_y[oy][win->_ch_off];
	}
}