+/*-
+ * Copyright (c) 1988 by Sun Microsystems
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted,
+ * provided that the above copyright notice appear in all copies and that
+ * both that copyright notice and this permission notice appear in
+ * supporting documentation.
+ *
+ * This file is provided AS IS with no warranties of any kind. The author
+ * shall have no liability with respect to the infringement of copyrights,
+ * trade secrets or any patents by this file or any part thereof. In no
+ * event will the author be liable for any lost revenue or profits or
+ * other special, indirect and consequential damages.
+ *
+ * Revision History:
+ * 01-Nov-2000: Allocation checks
+ * 30-May-1997: <jwz@jwz.org> made it go vertically as well as horizontally.
+ * 27-May-1997: <jwz@jwz.org> turned into a standalone program.
+ * 02-Sep-1993: xlock version David Bagley <bagleyd@tux.org>
+ * 1988: Revised to use SunView canvas instead of gfxsw Sun Microsystems
+ * 1982: Orignal Algorithm Tom Duff Lucasfilm Ltd.
+ */
+
+/*-
+ * original copyright
+ * **************************************************************************
+ * Copyright 1988 by Sun Microsystems, Inc. Mountain View, CA.