2.9BSD - /usr/src/lib/curses/overlay.c

   1: # include   "curses.ext"
   2: # include   <ctype.h>
   3: 
   4: # define    min(a,b)    (a < b ? a : b)
   5: # define    max(a,b)    (a > b ? a : b)
   6: 
   7: /*
   8:  *	This routine writes win1 on win2 non-destructively.
   9:  *
  10:  * 11/5/82 (Berkeley) @(#)overlay.c	1.4
  11:  */
  12: overlay(win1, win2)
  13: reg WINDOW  *win1, *win2; {
  14: 
  15:     reg char    *sp, *end;
  16:     reg int     x, y, endy, endx, starty, startx;
  17: 
  18: # ifdef DEBUG
  19:     fprintf(outf, "OVERLAY(%0.2o, %0.2o);\n", win1, win2);
  20: # endif
  21:     starty = max(win1->_begy, win2->_begy) - win1->_begy;
  22:     startx = max(win1->_begx, win2->_begx) - win1->_begx;
  23:     endy = min(win1->_maxy, win2->_maxy) - win1->_begy - 1;
  24:     endx = min(win1->_maxx, win2->_maxx) - win1->_begx - 1;
  25:     for (y = starty; y < endy; y++) {
  26:         end = &win1->_y[y][endx];
  27:         x = startx + win1->_begx;
  28:         for (sp = &win1->_y[y][startx]; sp <= end; sp++) {
  29:             if (!isspace(*sp))
  30:                 mvwaddch(win2, y + win1->_begy, x, *sp);
  31:             x++;
  32:         }
  33:     }
  34: }

Defined functions

Defined macros