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Annotation of coherent/d/usr/lib/libcurses/overwrite.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1981 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that the above copyright notice and this paragraph are
                      7:  * duplicated in all such forms and that any documentation,
                      8:  * advertising materials, and other materials related to such
                      9:  * distribution and use acknowledge that the software was developed
                     10:  * by the University of California, Berkeley.  The name of the
                     11:  * University may not be used to endorse or promote products derived
                     12:  * from this software without specific prior written permission.
                     13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     16:  */
                     17: 
                     18: #ifndef COHERENT
                     19: #ifndef lint
                     20: static uchar sccsid[] = "@(#)overwrite.c       5.3 (Berkeley) 6/30/88";
                     21: #endif /* not lint */
                     22: #endif /* not COHERENT */
                     23: 
                     24: # include      "curses.ext"
                     25: # include      <ctype.h>
                     26: 
                     27: # define       min(a,b)        (a < b ? a : b)
                     28: # define       max(a,b)        (a > b ? a : b)
                     29: 
                     30: /*
                     31:  *     This routine writes win1 on win2 destructively.
                     32:  *
                     33:  */
                     34: overwrite(win1, win2)
                     35: reg WINDOW     *win1, *win2; {
                     36: 
                     37:        reg int         x, y, endy, endx, starty, startx;
                     38: 
                     39: # ifdef DEBUG
                     40:        fprintf(outf, "OVERWRITE(%0.2o, %0.2o);\n", win1, win2);
                     41: # endif
                     42:        starty = max(win1->_begy, win2->_begy);
                     43:        startx = max(win1->_begx, win2->_begx);
                     44:        endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begx);
                     45:        endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx);
                     46:        if (starty >= endy || startx >= endx)
                     47:                return;
                     48: # ifdef DEBUG
                     49:        fprintf(outf, "OVERWRITE:from (%d,%d) to (%d,%d)\n", starty, startx, endy, endx);
                     50: # endif
                     51:        x = endx - startx;
                     52:        for (y = starty; y < endy; y++) {
                     53:                bcopy(&win1->_y[y - win1->_begy][startx - win1->_begx],
                     54:                      &win2->_y[y - win2->_begy][startx - win2->_begx], x);
                     55:                touchline(win2, y, startx - win2->_begx, endx - win2->_begx);
                     56:        }
                     57: }

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