production version - first attempt

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

#ifndef lint
static  char *sccsid = "@(#)wwredrawwin.c       3.3 83/08/18";
#endif

#include "ww.h"

wwredrawwin(w)
register struct ww *w;
{
       wwredrawwin1(w, 0, w->ww_w.nr - 1, w->ww_scroll);
}

wwredrawwin1(w, srow, erow, offset)
register struct ww *w;
int srow, erow, 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[srow + w->ww_w.t];
       for (i = srow; i <= erow; i++, touched++) {
               ns = &wwns[i + w->ww_w.t][w->ww_w.l];
               smap = &wwsmap[i + w->ww_w.t][w->ww_w.l];
               buf = w->ww_buf[offset + i];
               win = w->ww_win[i];
               for (j = w->ww_w.nc; --j >= 0;)
                       if (*smap++ != w->ww_index)
                               win++, ns++, buf++;
                       else {
                               *touched = 1;
                               ns++->c_w = buf++->c_w
                                       ^ *win++ << WWC_MSHIFT;
                       }
       }
}