1 files changed, 90 insertions, 0 deletions
diff --git a/usr/src/lib/libcurses/screen/wsyncdown.c b/usr/src/lib/libcurses/screen/wsyncdown.c
new file mode 100644
index 0000000000..4604766b03
--- /dev/null
+++ b/usr/src/lib/libcurses/screen/wsyncdown.c
@@ -0,0 +1,90 @@
+/*
+ * 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 1997 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*	Copyright (c) 1988 AT&T	*/
+/*	  All Rights Reserved	*/
+
+/*
+ * University Copyright- Copyright (c) 1982, 1986, 1988
+ * The Regents of the University of California
+ * All Rights Reserved
+ *
+ * University Acknowledgment- Portions of this document are derived from
+ * software developed by the University of California, Berkeley, and its
+ * contributors.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*LINTLIBRARY*/
+
+#include	<sys/types.h>
+#include	"curses_inc.h"
+
+/* Make the changes in ancestors visible in win. */
+
+void
+wsyncdown(WINDOW *win)
+{
+	short	*wbch, *wech, *pbch, *pech, bch, ech, endx;
+	int	wy, px, py, endy;
+	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;
+	}
+}