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 /*LINTLIBRARY*/
16
17 #ifndef lint
18 static char
19 sccsid[] = "@(#)overwrite.c 1.7 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
20 #endif /* not lint */
21
22 #include "curses.ext"
23 #include <ctype.h>
24 #include <string.h>
25
26 #define min(a, b) ((a) < (b) ? (a) : (b))
27 #define max(a, b) ((a) > (b) ? (a) : (b))
28
29 /*
30 * This routine writes win1 on win2 destructively.
31 */
32
33 int
overwrite(WINDOW * win1,WINDOW * win2)34 overwrite(WINDOW *win1, WINDOW *win2)
35 {
36 int x, y, endy, endx, starty, startx;
37
38 #ifdef DEBUG
39 fprintf(outf, "OVERWRITE(%0.2o, %0.2o);\n", win1, win2);
40 #endif
41 starty = max(win1->_begy, win2->_begy);
42 startx = max(win1->_begx, win2->_begx);
43 endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy);
44 endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx);
45 if (starty >= endy || startx >= endx)
46 return (OK);
47 #ifdef DEBUG
48 fprintf(outf, "OVERWRITE:from (%d,%d) to (%d,%d)\n",
49 starty, startx, endy, endx);
50 #endif
51 x = endx - startx;
52 for (y = starty; y < endy; y++) {
53 (void) memmove(&win2->_y[y - win2->_begy][startx - win2->_begx],
54 &win1->_y[y - win1->_begy][startx - win1->_begx], x);
55 (void) touchline(win2, y, startx - win2->_begx,
56 endx - win2->_begx);
57 }
58 return (OK);
59 }
60