/* * Copyright (c) 1981, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char sccsid[] = "@(#)overwrite.c 8.2 (Berkeley) 5/4/94"; #endif /* not lint */ #include #include #include "curses.h" /* * overwrite -- * Writes win1 on win2 destructively. */ int overwrite(win1, win2) register WINDOW *win1, *win2; { register int x, y, endy, endx, starty, startx; #ifdef DEBUG __CTRACE("overwrite: (%0.2o, %0.2o);\n", win1, win2); #endif starty = max(win1->begy, win2->begy); startx = max(win1->begx, win2->begx); endy = min(win1->maxy + win1->begy, win2->maxy + win2->begx); endx = min(win1->maxx + win1->begx, win2->maxx + win2->begx); if (starty >= endy || startx >= endx) return (OK); #ifdef DEBUG __CTRACE("overwrite: from (%d, %d) to (%d, %d)\n", starty, startx, endy, endx); #endif x = endx - startx; for (y = starty; y < endy; y++) { (void)memcpy( &win2->lines[y - win2->begy]->line[startx - win2->begx], &win1->lines[y - win1->begy]->line[startx - win1->begx], x * __LDATASIZE); __touchline(win2, y, startx - win2->begx, endx - win2->begx, 0); } return (OK); }