1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 */ 6 7 #ifndef lint 8 static char sccsid[] = "@(#)overwrite.c 5.1 (Berkeley) 06/07/85"; 9 #endif not lint 10 11 # include "curses.ext" 12 # include <ctype.h> 13 14 # define min(a,b) (a < b ? a : b) 15 # define max(a,b) (a > b ? a : b) 16 17 /* 18 * This routine writes win1 on win2 destructively. 19 * 20 */ 21 overwrite(win1, win2) 22 reg WINDOW *win1, *win2; { 23 24 reg char *sp, *end; 25 reg int x, y, endy, endx, starty, startx; 26 27 # ifdef DEBUG 28 fprintf(outf, "OVERWRITE(%0.2o, %0.2o);\n", win1, win2); 29 # endif 30 starty = max(win1->_begy, win2->_begy); 31 startx = max(win1->_begx, win2->_begx); 32 endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begx); 33 endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx); 34 if (starty >= endy || startx >= endx) 35 return; 36 # ifdef DEBUG 37 fprintf(outf, "OVERWRITE:from (%d,%d) to (%d,%d)\n", starty, startx, endy, endx); 38 # endif 39 x = endx - startx; 40 for (y = starty; y < endy; y++) { 41 bcopy(&win1->_y[y - win1->_begy][startx - win1->_begx], 42 &win2->_y[y - win2->_begy][startx - win2->_begx], x); 43 touchline(win2, y, startx - win2->_begx, endx - win2->_begx); 44 } 45 } 46