1 /* 2 * Copyright (c) 1981, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)overwrite.c 8.2 (Berkeley) 05/04/94"; 10 #endif /* not lint */ 11 12 #include <ctype.h> 13 #include <string.h> 14 15 #include "curses.h" 16 17 /* 18 * overwrite -- 19 * Writes win1 on win2 destructively. 20 */ 21 int 22 overwrite(win1, win2) 23 register WINDOW *win1, *win2; 24 { 25 register int x, y, endy, endx, starty, startx; 26 27 #ifdef DEBUG 28 __CTRACE("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 (OK); 36 #ifdef DEBUG 37 __CTRACE("overwrite: from (%d, %d) to (%d, %d)\n", 38 starty, startx, endy, endx); 39 #endif 40 x = endx - startx; 41 for (y = starty; y < endy; y++) { 42 (void)memcpy( 43 &win2->lines[y - win2->begy]->line[startx - win2->begx], 44 &win1->lines[y - win1->begy]->line[startx - win1->begx], 45 x * __LDATASIZE); 46 __touchline(win2, y, startx - win2->begx, endx - win2->begx, 47 0); 48 } 49 return (OK); 50 } 51