gistfile1.scala

  /** Returns the size and the remaining vector. */
  def segmentBodySize(vector: ByteVector): (Int, ByteVector) = {
    def loop(index: Int = 0, accum: Int = 0): (Int, ByteVector) = {
      val value = (vector(index) & 0xFF)
      if (value != 255) {
        (value + accum, vector.drop(index + 1))
      } else {
        loop(value + accum, index + 1)
      }
    }
  }