include	defs

# esc - map array (i) into escaped character if appropriate

   character function esc (array, i)
   character array (ARB)
   integer i

   if (array (i) != ESCAPE)
      esc = array (i)
   else if (array (i+1) == EOS)    # @ not special at end
      esc = ESCAPE
   else {
      i = i + 1
      if (array (i) == LETN | array (i) == BIGN)
	 esc = NEWLINE
      else if (array (i) == LETT | array (i) == BIGT)
	 esc = TAB
      else
	 esc = array (i)
      }

   return
   end