* [UTS #46]: https://www.unicode.org/reports/tr46/
 */
object Punycode {
  val PREFIX_STRING = "xn--"
  val PREFIX = PREFIX_STRING.encodeUtf8()

  private const val BASE = 36
  private const val TMIN = 1
  private const val TMAX = 26
  private const val SKEW = 38
  private const val DAMP = 700
  private const val INITIAL_BIAS = 72
  private const val INITIAL_N = 0x80

  /**

      )
    write("woman god creates dinosaurs destroys. ".encodeUtf8())
    val buffer = Buffer()
    operator.read(6, buffer, 21)
    operator.read(36, buffer, 1)
    operator.read(5, buffer, 5)
    operator.read(28, buffer, 8)
    operator.read(17, buffer, 10)
    operator.read(36, buffer, 2)
    operator.read(2, buffer, 4)
    operator.write(0, buffer, buffer.size)
    operator.read(0, buffer, 12)
    operator.read(47, buffer, 3)

    assertThat(certificate.getSubjectX500Principal().name, "self-signed")
      .isEqualTo(certificate.getIssuerX500Principal().name)
    assertThat(certificate.getIssuerX500Principal().name).matches(Regex("CN=[0-9a-f-]{36}"))
    assertThat(certificate.serialNumber).isEqualTo(BigInteger.ONE)
    assertThat(certificate.subjectAlternativeNames).isNull()
    val deltaMillis = 1000.0
    val durationMillis = TimeUnit.MINUTES.toMillis((60 * 24).toLong())

    assertThat(formEncode(32)).isEqualTo("+")
    assertThat(formEncode(33)).isEqualTo("%21")
    assertThat(formEncode(34)).isEqualTo("%22")
    assertThat(formEncode(35)).isEqualTo("%23")
    assertThat(formEncode(36)).isEqualTo("%24")
    assertThat(formEncode(37)).isEqualTo("%25")
    assertThat(formEncode(38)).isEqualTo("%26")
    assertThat(formEncode(39)).isEqualTo("%27")
    assertThat(formEncode(40)).isEqualTo("%28")