NetBSD/lib/libcurses/overwrite.c

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/* $NetBSD: overwrite.c,v 1.9 1998/02/03 19:12:31 perry Exp $ */
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/*
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* Copyright (c) 1981, 1993, 1994
* The Regents of the University of California. All rights reserved.
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*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)overwrite.c 8.2 (Berkeley) 5/4/94";
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#else
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__RCSID("$NetBSD: overwrite.c,v 1.9 1998/02/03 19:12:31 perry Exp $");
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#endif
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#endif /* not lint */
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#include <ctype.h>
#include <string.h>
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#include "curses.h"
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/*
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* overwrite --
* Writes win1 on win2 destructively.
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*/
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int
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overwrite(win1, win2)
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WINDOW *win1, *win2;
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{
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int x, y, endy, endx, starty, startx;
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#ifdef DEBUG
__CTRACE("overwrite: (%0.2o, %0.2o);\n", win1, win2);
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#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);
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if (starty >= endy || startx >= endx)
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return (OK);
#ifdef DEBUG
__CTRACE("overwrite: from (%d, %d) to (%d, %d)\n",
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starty, startx, endy, endx);
#endif
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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);
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}
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return (OK);
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}