OpenSolaris Launch

1 files changed, 66 insertions, 0 deletions

diff --git a/usr/src/ucblib/libcurses/overlay.c b/usr/src/ucblib/libcurses/overlay.c
new file mode 100644
index 0000000000..d4982156ba
--- /dev/null
+++ b/usr/src/ucblib/libcurses/overlay.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2001 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[] = "@(#)overlay.c 1.9 89/07/13 SMI"; /* from UCB 5.2 86/02/12 */
+#endif /* not lint */
+
+#include	"curses.ext"
+#include	<ctype.h>
+
+#define	min(a, b)	((a) < (b) ? (a) : (b))
+#define	max(a, b)	((a) > (b) ? (a) : (b))
+
+/*
+ *	This routine writes win1 on win2 non-destructively.
+ */
+
+int
+overlay(WINDOW *win1, WINDOW *win2)
+{
+	char	*sp, *end;
+	int	x, y, endy, endx, starty, startx;
+	int 	y1, y2;
+
+#ifdef DEBUG
+	fprintf(outf, "OVERLAY(%0.2o, %0.2o);\n", win1, win2);
+#endif
+	starty = max(win1->_begy, win2->_begy);
+	startx = max(win1->_begx, win2->_begx);
+	endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy);
+	endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx);
+#ifdef DEBUG
+	fprintf(outf, "OVERLAY:from (%d,%d) to (%d,%d)\n",
+	    starty, startx, endy, endx);
+#endif
+	if (starty >= endy || startx >= endx)
+		return (OK);
+	y1 = starty - win1->_begy;
+	y2 = starty - win2->_begy;
+	for (y = starty; y < endy; y++, y1++, y2++) {
+		end = &win1->_y[y1][endx - win1->_begx];
+		x = startx - win2->_begx;
+		for (sp = &win1->_y[y1][startx - win1->_begx]; sp < end; sp++) {
+			if (!isspace(*sp))
+				(void) mvwaddch(win2, y2, x, *sp);
+			x++;
+		}
+	}
+	return (OK);
+}