Function ipv6

test-app/runtime/src/main/cpp/ada/ada.cpp:10988–11027

}

std::string ipv6(const std::array<uint16_t, 8>& address) noexcept {
  size_t compress_length = 0;  // The length of a long sequence of zeros.
  size_t compress = 0;         // The start of a long sequence of zeros.
  find_longest_sequence_of_ipv6_pieces(address, compress, compress_length);

  if (compress_length <= 1) {
    // Optimization opportunity: Find a faster way then snprintf for imploding
    // and return here.
    compress = compress_length = 8;
  }

  std::string output(4 * 8 + 7 + 2, '\0');
  size_t piece_index = 0;
  char* point = output.data();
  char* point_end = output.data() + output.size();
  *point++ = '[';
  while (true) {
    if (piece_index == compress) {
      *point++ = ':';
      // If we skip a value initially, we need to write '::', otherwise
      // a single ':' will do since it follows a previous ':'.
      if (piece_index == 0) {
        *point++ = ':';
      }
      piece_index += compress_length;
      if (piece_index == 8) {
        break;
      }
    }
    point = std::to_chars(point, point_end, address[piece_index], 16).ptr;
    piece_index++;
    if (piece_index == 8) {
      break;
    }
    *point++ = ':';
  }
  *point++ = ']';
  output.resize(point - output.data());
  return output;
}

std::string ipv4(const uint64_t address) noexcept {
  std::string output(15, '\0');