2 * Copyright (c) 1981, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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15 * This product includes software developed by the University of
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35 static char sccsid[] = "@(#)overwrite.c 8.2 (Berkeley) 5/4/94";
45 * Writes win1 on win2 destructively.
49 register WINDOW *win1, *win2;
51 register int x, y, endy, endx, starty, startx;
54 __CTRACE("overwrite: (%0.2o, %0.2o);\n", win1, win2);
56 starty = max(win1->begy, win2->begy);
57 startx = max(win1->begx, win2->begx);
58 endy = min(win1->maxy + win1->begy, win2->maxy + win2->begx);
59 endx = min(win1->maxx + win1->begx, win2->maxx + win2->begx);
60 if (starty >= endy || startx >= endx)
63 __CTRACE("overwrite: from (%d, %d) to (%d, %d)\n",
64 starty, startx, endy, endx);
67 for (y = starty; y < endy; y++) {
69 &win2->lines[y - win2->begy]->line[startx - win2->begx],
70 &win1->lines[y - win1->begy]->line[startx - win1->begx],
72 __touchline(win2, y, startx - win2->begx, endx - win2->begx,