1 /* 2 * Copyright (c) 1981, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /* from: static char sccsid[] = "@(#)overwrite.c 8.1 (Berkeley) 6/4/93"; */ 36 static char *rcsid = "$Id: overwrite.c,v 1.6 1993/11/09 04:08:28 cgd Exp $"; 37 #endif /* not lint */ 38 39 #include <ctype.h> 40 #include <curses.h> 41 #include <string.h> 42 43 /* 44 * overwrite -- 45 * Writes win1 on win2 destructively. 46 */ 47 int 48 overwrite(win1, win2) 49 register WINDOW *win1, *win2; 50 { 51 register int x, y, endy, endx, starty, startx; 52 53 #ifdef DEBUG 54 __CTRACE("overwrite: (%0.2o, %0.2o);\n", win1, win2); 55 #endif 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) 61 return (OK); 62 #ifdef DEBUG 63 __CTRACE("overwrite: from (%d, %d) to (%d, %d)\n", 64 starty, startx, endy, endx); 65 #endif 66 x = endx - startx; 67 for (y = starty; y < endy; y++) { 68 (void)memcpy( 69 &win2->lines[y - win2->begy]->line[startx - win2->begx], 70 &win1->lines[y - win1->begy]->line[startx - win1->begx], 71 x * __LDATASIZE); 72 __touchline(win2, y, startx - win2->begx, endx - win2->begx, 73 0); 74 } 75 return (OK); 76 } 77