4.3BSD - /usr/src/usr.bin/tbl/ti.c

   1: #ifndef lint
   2: static char sccsid[] = "@(#)ti.c	4.2 8/11/83";
   3: #endif
   4: 
   5:  /* ti.c: classify line intersections */
   6: # include "t..c"
   7: /* determine local environment for intersections */
   8: interv(i,c)
   9: {
  10: int ku, kl;
  11: if (c>=ncol || c == 0)
  12:     {
  13:     if (dboxflg)
  14:         {
  15:         if (i==0) return(BOT);
  16:         if (i>=nlin) return(TOP);
  17:         return(THRU);
  18:         }
  19:     if (c>=ncol)
  20:         return(0);
  21:     }
  22: ku = i>0 ? lefdata(i-1,c) : 0;
  23: if (i+1 >= nlin)
  24:     kl=0;
  25: else
  26: kl = lefdata(allh(i) ? i+1 : i, c);
  27: if (ku==2 && kl==2) return(THRU);
  28: if (ku ==2) return(TOP);
  29: if (kl==BOT) return(2);
  30: return(0);
  31: }
  32: interh(i,c)
  33: {
  34: int kl, kr;
  35: if (fullbot[i]== '=' || (dboxflg && (i==0 || i>= nlin-1)))
  36:     {
  37:     if (c==ncol)
  38:         return(LEFT);
  39:     if (c==0)
  40:         return(RIGHT);
  41:     return(THRU);
  42:     }
  43: if (i>=nlin) return(0);
  44: kl = c>0 ? thish (i,c-1) : 0;
  45: if (kl<=1 && i>0 && allh(up1(i)))
  46:     kl = c>0 ? thish(up1(i),c-1) : 0;
  47: kr = thish(i,c);
  48: if (kr<=1 && i>0 && allh(up1(i)))
  49:     kr = c>0 ? thish(up1(i), c) : 0;
  50: if (kl== '=' && kr ==  '=') return(THRU);
  51: if (kl== '=') return(LEFT);
  52: if (kr== '=') return(RIGHT);
  53: return(0);
  54: }
  55: up1(i)
  56: {
  57: i--;
  58: while (instead[i] && i>0) i--;
  59: return(i);
  60: }

Defined functions

Defined variables