46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/*
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* Copyright (c) 1980 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)overwrite.c 1.1 92/07/30 SMI"; /* from UCB 5.1 85/06/07 */
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#endif not lint
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# include "curses.ext"
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# include <ctype.h>
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# define min(a,b) (a < b ? a : b)
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# define max(a,b) (a > b ? a : b)
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/*
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* This routine writes win1 on win2 destructively.
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*
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*/
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overwrite(win1, win2)
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reg WINDOW *win1, *win2; {
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reg char *sp, *end;
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reg int x, y, endy, endx, starty, startx;
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# ifdef DEBUG
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fprintf(outf, "OVERWRITE(%0.2o, %0.2o);\n", win1, win2);
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# endif
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starty = max(win1->_begy, win2->_begy);
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startx = max(win1->_begx, win2->_begx);
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endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy);
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endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx);
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if (starty >= endy || startx >= endx)
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return;
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# ifdef DEBUG
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fprintf(outf, "OVERWRITE:from (%d,%d) to (%d,%d)\n", starty, startx, endy, endx);
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# endif
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x = endx - startx;
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for (y = starty; y < endy; y++) {
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bcopy(&win1->_y[y - win1->_begy][startx - win1->_begx],
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&win2->_y[y - win2->_begy][startx - win2->_begx], x);
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touchline(win2, y, startx - win2->_begx, endx - win2->_begx);
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}
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}
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