1 /*
2 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5
6 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
7 /* All Rights Reserved */
8
9 /*
10 * Copyright (c) 1980 Regents of the University of California.
11 * All rights reserved. The Berkeley software License Agreement
12 * specifies the terms and conditions for redistribution.
13 */
14
15 #pragma ident "%Z%%M% %I% %E% SMI"
16
17 /*LINTLIBRARY*/
18
19 #ifndef lint
20 static char
21 sccsid[] = "@(#)overwrite.c 1.7 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
22 #endif /* not lint */
23
24 #include "curses.ext"
25 #include <ctype.h>
26 #include <string.h>
27
28 #define min(a, b) ((a) < (b) ? (a) : (b))
29 #define max(a, b) ((a) > (b) ? (a) : (b))
30
31 /*
32 * This routine writes win1 on win2 destructively.
33 */
34
35 int
overwrite(WINDOW * win1,WINDOW * win2)36 overwrite(WINDOW *win1, WINDOW *win2)
37 {
38 int x, y, endy, endx, starty, startx;
39
40 #ifdef DEBUG
41 fprintf(outf, "OVERWRITE(%0.2o, %0.2o);\n", win1, win2);
42 #endif
43 starty = max(win1->_begy, win2->_begy);
44 startx = max(win1->_begx, win2->_begx);
45 endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy);
46 endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx);
47 if (starty >= endy || startx >= endx)
48 return (OK);
49 #ifdef DEBUG
50 fprintf(outf, "OVERWRITE:from (%d,%d) to (%d,%d)\n",
51 starty, startx, endy, endx);
52 #endif
53 x = endx - startx;
54 for (y = starty; y < endy; y++) {
55 (void) memmove(&win2->_y[y - win2->_begy][startx - win2->_begx],
56 &win1->_y[y - win1->_begy][startx - win1->_begx], x);
57 (void) touchline(win2, y, startx - win2->_begx,
58 endx - win2->_begx);
59 }
60 return (OK);
61 }
62