NetBSD/lib/libcurses/overwrite.c

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1993-03-21 12:45:37 +03:00
/*
* Copyright (c) 1981 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. 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.
*/
#ifndef lint
static char sccsid[] = "@(#)overwrite.c 5.4 (Berkeley) 6/1/90";
#endif /* not lint */
# include "curses.ext"
# include <ctype.h>
# define min(a,b) (a < b ? a : b)
# define max(a,b) (a > b ? a : b)
/*
* This routine writes win1 on win2 destructively.
*
*/
overwrite(win1, win2)
reg WINDOW *win1, *win2; {
reg char *sp, *end;
reg int x, y, endy, endx, starty, startx;
# ifdef DEBUG
fprintf(outf, "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;
# ifdef DEBUG
fprintf(outf, "OVERWRITE:from (%d,%d) to (%d,%d)\n", starty, startx, endy, endx);
# endif
x = endx - startx;
for (y = starty; y < endy; y++) {
bcopy(&win1->_y[y - win1->_begy][startx - win1->_begx],
&win2->_y[y - win2->_begy][startx - win2->_begx], x);
touchline(win2, y, startx - win2->_begx, endx - win2->_begx);
}
}