1 /* 2 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 7 /* All Rights Reserved */ 8 9 /* 10 * Copyright (c) 1980 Regents of the University of California. 11 * All rights reserved. The Berkeley software License Agreement 12 * specifies the terms and conditions for redistribution. 13 */ 14 15 /*LINTLIBRARY*/ 16 17 #ifndef lint 18 static char 19 sccsid[] = "@(#)overwrite.c 1.7 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */ 20 #endif /* not lint */ 21 22 #include "curses.ext" 23 #include <ctype.h> 24 #include <string.h> 25 26 #define min(a, b) ((a) < (b) ? (a) : (b)) 27 #define max(a, b) ((a) > (b) ? (a) : (b)) 28 29 /* 30 * This routine writes win1 on win2 destructively. 31 */ 32 33 int 34 overwrite(WINDOW *win1, WINDOW *win2) 35 { 36 int x, y, endy, endx, starty, startx; 37 38 #ifdef DEBUG 39 fprintf(outf, "OVERWRITE(%0.2o, %0.2o);\n", win1, win2); 40 #endif 41 starty = max(win1->_begy, win2->_begy); 42 startx = max(win1->_begx, win2->_begx); 43 endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy); 44 endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx); 45 if (starty >= endy || startx >= endx) 46 return (OK); 47 #ifdef DEBUG 48 fprintf(outf, "OVERWRITE:from (%d,%d) to (%d,%d)\n", 49 starty, startx, endy, endx); 50 #endif 51 x = endx - startx; 52 for (y = starty; y < endy; y++) { 53 (void) memmove(&win2->_y[y - win2->_begy][startx - win2->_begx], 54 &win1->_y[y - win1->_begy][startx - win1->_begx], x); 55 (void) touchline(win2, y, startx - win2->_begx, 56 endx - win2->_begx); 57 } 58 return (OK); 59 } 60