2.9BSD - /usr/src/cmd/troff/tw.h

   1: /* typewriter driving table structure*/
   2: struct {
   3:     int bset;
   4:     int breset;
   5:     int Hor;
   6:     int Vert;
   7:     int Newline;
   8:     int Char;
   9:     int Em;
  10:     int Halfline;
  11:     int Adj;
  12:     char *twinit;
  13:     char *twrest;
  14:     char *twnl;
  15:     char *hlr;
  16:     char *hlf;
  17:     char *flr;
  18:     char *bdon;
  19:     char *bdoff;
  20:     char *ploton;
  21:     char *plotoff;
  22:     char *up;
  23:     char *down;
  24:     char *right;
  25:     char *left;
  26:     char *codetab[256-32];
  27:     char *zzz;
  28:     } t;

Usage of this include