/*	Copyright (c) 1984 AT&T	*//*	  All Rights Reserved  	*//*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*//*	The copyright notice above does not evidence any   	*//*	actual or intended publication of such source code.	*/#ifndef lintstatic	char sccsid[] = "@(#)wsyncdown.c 1.1 92/07/30 SMI"; /* from S5R3.1 1.6 */#endif#include	"curses_inc.h"/* Make the changes in ancestors visible in win. */voidwsyncdown(win)register	WINDOW	*win;{    register	short	*wbch, *wech, *pbch, *pech;    register	int	wy, px, py, endy, endx, bch, ech;    register	WINDOW	*par;    py = win->_pary;    px = win->_parx;    endy = win->_maxy;    endx = win->_maxx - 1;    for (par = win->_parent; par != NULL; par = par->_parent)    {	if (par->_flags & (_WINCHANGED | _WIN_ADD_ONE | _WIN_INS_ONE))	{	    wbch = win->_firstch;	    wech = win->_lastch;	    pbch = par->_firstch + py;	    pech = par->_lastch + py;	    for (wy = 0; wy < endy; ++wy, ++wbch, ++wech, ++pbch, ++pech)	    {		if (*pbch != _INFINITY)		{		    if ((bch = *pbch - px) < 0)			bch = 0;		    if ((ech = *pech - px) > endx)			ech = endx;		    if (!(bch > endx || ech < 0))		    {			if (*wbch > bch)			    *wbch = bch;			if (*wech < ech)			    *wech = ech;		    }		}	    }	    win->_flags |= _WINCHANGED;	}	py += par->_pary;	px += par->_parx;    }}