# File rbBinaryCFPropertyList.rb, line 130
    def read_binary_int(fname,fd,length)
      raise CFFormatError.new("Integer greater than 8 bytes: #{length}") if length > 3

      nbytes = 1 << length

      val = nil
      buff = fd.read(nbytes)

      case length
      when 0 then
        val = buff.unpack("C")
        val = val[0]
      when 1 then
        val = buff.unpack("n")
        val = val[0]
      when 2 then
        val = buff.unpack("N")
        val = val[0]
      when 3
        hiword,loword = buff.unpack("NN")
        val = hiword << 32 | loword
      end

      return CFInteger.new(val);
    end