support graphics if setup by somebody else.

[unix-history] / usr / src / usr.bin / window / wwredrawwin.c

#ifndef lint
static  char *sccsid = "@(#)wwredrawwin.c       3.6 83/09/15";
#endif

#include "ww.h"

wwredrawwin1(w, row1, row2, offset)
register struct ww *w;
int row1, row2, offset;
{
       int i;
       register j;
       register char *smap;
       register union ww_char *buf;
       register char *win;
       register union ww_char *ns;
       char *touched;

       touched = &wwtouched[row1];
       for (i = row1; i < row2; i++, touched++) {
               ns = &wwns[i][w->ww_i.l];
               smap = &wwsmap[i][w->ww_i.l];
               buf = &w->ww_buf[i + offset][w->ww_i.l];
               win = &w->ww_win[i][w->ww_i.l];
               for (j = w->ww_i.nc; --j >= 0;)
                       if (*smap++ != w->ww_index)
                               win++, ns++, buf++;
                       else {
                               *touched = 1;
                               ns++->c_w = buf++->c_w
                                       ^ *win++ << WWC_MSHIFT;
                       }
       }
}