Calculate the addition of IPv4 and IPv6 prefix lengths (e.g. a IPv4 /23 and a /23 result in a /22)

IPvXPrefixCalculator.scala

object PrefixCalculator {
 
  def sumIpv4(ipv4Prefixes: Seq[Int]) : Int = doSumIpvX(ipv4Prefixes, 32)
 
  def sumIpv6(ipv6Prefixes: Seq[Int]) : Int = doSumIpvX(ipv6Prefixes, 128)
 
  private def doSumIpvX(prefixes: Seq[Int], bitSize: Int) : Int = {
    val addressSize = prefixes.map(prefix => Math.pow(2, bitSize - prefix)).sum
    (bitSize - (Math.log(addressSize) / Math.log(2))).floor.toInt
  }
 
}