void Ipv6Address::Print()

in simulation/src/network/utils/ipv6-address.cc [612:705]
81 lines of code
19 McCabe index (conditional complexity)

void Ipv6Address::Print (std::ostream& os) const
{
  NS_LOG_FUNCTION (this << &os);

  // note: part of this function has been adapted from inet_ntop6 Linux function.
  // See http://www.net-snmp.org/dev/agent/inet__ntop_8c_source.html
  // Author: Paul Vixie, 1996.

  if (IsIpv4MappedAddress ())
    {
      os << "::ffff:"
         << (unsigned int) m_address[12] << "."
         << (unsigned int) m_address[13] << "."
         << (unsigned int) m_address[14] << "."
         << (unsigned int) m_address[15];
      return;
    }

  uint16_t address[8];
  uint8_t i;

  for (i=0; i<8; i++)
    {
      address[i] = (uint16_t(m_address[2*i]) << 8) | uint16_t(m_address[2*i+1]);
    }

  int8_t bestBase = -1;
  int8_t bestLen = 0;
  int8_t curBase = -1;
  int8_t curLen = 0;

  for (i=0; i<8; i++)
    {
      if (address[i] == 0)
        {
          if (curBase == -1)
            {
              curBase = i;
              curLen = 1;
            }
          else
            {
              curLen++;
            }
        }
      else
        {
          if (curBase != -1)
            {
              if (bestBase == -1 || curLen > bestLen)
                {
                  bestBase = curBase;
                  bestLen = curLen;
                }
              curBase = -1;
            }
        }
    }
  if (curBase != -1)
    {
      if (bestBase == -1 || curLen > bestLen)
        {
          bestBase = curBase;
          bestLen = curLen;
        }
    }
  if (bestBase != -1 && bestLen < 2)
    {
      bestBase = -1;
    }

  for (i = 0; i < 8;) {
      // Are we inside the best run of 0x00's?
      if (i == bestBase)
        {
          os << ':';
          i += bestLen;
          continue;
        }
      // Are we following an initial run of 0x00s or any real hex?
      if (i != 0)
        {
          os << ':';
        }
      os << std::hex << (unsigned int) address[i];
      i++;
  }
  // Was it a trailing run of 0x00's?
  if (bestBase != -1 && (bestBase + bestLen) == 8)
    {
      os << ':';
    }
  os << std::dec;
}