home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
GEMini Atari
/
GEMini_Atari_CD-ROM_Walnut_Creek_December_1993.iso
/
files
/
gnu
/
crssrc12
/
overlay.c
< prev
next >
Wrap
C/C++ Source or Header
|
1993-07-29
|
2KB
|
63 lines
/*
* Copyright (c) 1981 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)overlay.c 5.5 (Berkeley) 6/30/88";
#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 non-destructively.
*
*/
void overlay(win1, win2)
reg WINDOW *win1, *win2; {
reg char *sp, *end;
reg int x, y, endy, endx, starty, startx;
reg int y1,y2;
# ifdef DEBUG
fprintf(outf, "OVERLAY(%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);
# ifdef DEBUG
fprintf(outf, "OVERLAY:from (%d,%d) to (%d,%d)\n", starty, startx, endy, endx);
# endif
if (starty >= endy || startx >= endx)
return;
y1 = starty - win1->_begy;
y2 = starty - win2->_begy;
for (y = starty; y < endy; y++, y1++, y2++) {
end = &win1->_y[y1][endx - win1->_begx];
x = startx - win2->_begx;
for (sp = &win1->_y[y1][startx - win1->_begx]; sp < end; sp++) {
if (!isspace(*sp))
mvwaddch(win2, y2, x, *sp);
x++;
}
}
}