func doOpen
  fvar(f)
  f = FileName
  println(fid, ' = fopen(', f, ', ', Mode, ');')
  if(linked(Size))
    println(fsize, ' = filesize(', f, ');')
  end
  event(onOpen, fid)
  if(AutoClose)
    println('fclose(', fid, ');')
  end
end

func doClose
  println('fclose(', fid, ');')
end

func FileID
  return(fid)
end

func Size
  return(fsize)
end