1 /*
2 * Copyright (c) 1981, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef lint
31 static char sccsid[] = "@(#)overwrite.c 8.2 (Berkeley) 5/4/94";
32 #endif /* not lint */
33
34 #include <ctype.h>
35 #include <string.h>
36
37 #include "curses.h"
38
39 /*
40 * overwrite --
41 * Writes win1 on win2 destructively.
42 */
43 int
overwrite(win1,win2)44 overwrite(win1, win2)
45 register WINDOW *win1, *win2;
46 {
47 register int x, y, endy, endx, starty, startx;
48
49 #ifdef DEBUG
50 __CTRACE("overwrite: (%0.2o, %0.2o);\n", win1, win2);
51 #endif
52 starty = max(win1->begy, win2->begy);
53 startx = max(win1->begx, win2->begx);
54 endy = min(win1->maxy + win1->begy, win2->maxy + win2->begx);
55 endx = min(win1->maxx + win1->begx, win2->maxx + win2->begx);
56 if (starty >= endy || startx >= endx)
57 return (OK);
58 #ifdef DEBUG
59 __CTRACE("overwrite: from (%d, %d) to (%d, %d)\n",
60 starty, startx, endy, endx);
61 #endif
62 x = endx - startx;
63 for (y = starty; y < endy; y++) {
64 (void)memcpy(
65 &win2->lines[y - win2->begy]->line[startx - win2->begx],
66 &win1->lines[y - win1->begy]->line[startx - win1->begx],
67 x * __LDATASIZE);
68 __touchline(win2, y, startx - win2->begx, endx - win2->begx,
69 0);
70 }
71 return (OK);
72 }
73