# File lib/rubytorrent/package.rb, line 86
  def rdiff(o)
    return [] if o == self
    ret = []
    int = rint o
    return [] if int == self
    return [self] if int == nil
    raise RangeError, "can't subtract a range that doesn't have an exclusive end" unless int.exclude_end?
    if int.first > first
      ret << AwesomeRange.new(first, int.first, true)
    end
    ret + [AwesomeRange.new(int.last, last, exclude_end?)]
  end