inline int gai_nsearch()

in demo_example/asio/asio/detail/impl/socket_ops.ipp [2970:3059]

• 87 lines of code
• 13 McCabe index (conditional complexity)

inline int gai_nsearch(const char* host,
    const addrinfo_type* hints, gai_search (&search)[2])
{
  int search_count = 0;
  if (host == 0 || host[0] == '\0')
  {
    if (hints->ai_flags & AI_PASSIVE)
    {
      // No host and AI_PASSIVE implies wildcard bind.
      switch (hints->ai_family)
      {
      case ASIO_OS_DEF(AF_INET):
        search[search_count].host = "0.0.0.0";
        search[search_count].family = ASIO_OS_DEF(AF_INET);
        ++search_count;
        break;
      case ASIO_OS_DEF(AF_INET6):
        search[search_count].host = "0::0";
        search[search_count].family = ASIO_OS_DEF(AF_INET6);
        ++search_count;
        break;
      case ASIO_OS_DEF(AF_UNSPEC):
        search[search_count].host = "0::0";
        search[search_count].family = ASIO_OS_DEF(AF_INET6);
        ++search_count;
        search[search_count].host = "0.0.0.0";
        search[search_count].family = ASIO_OS_DEF(AF_INET);
        ++search_count;
        break;
      default:
        break;
      }
    }
    else
    {
      // No host and not AI_PASSIVE means connect to local host.
      switch (hints->ai_family)
      {
      case ASIO_OS_DEF(AF_INET):
        search[search_count].host = "localhost";
        search[search_count].family = ASIO_OS_DEF(AF_INET);
        ++search_count;
        break;
      case ASIO_OS_DEF(AF_INET6):
        search[search_count].host = "localhost";
        search[search_count].family = ASIO_OS_DEF(AF_INET6);
        ++search_count;
        break;
      case ASIO_OS_DEF(AF_UNSPEC):
        search[search_count].host = "localhost";
        search[search_count].family = ASIO_OS_DEF(AF_INET6);
        ++search_count;
        search[search_count].host = "localhost";
        search[search_count].family = ASIO_OS_DEF(AF_INET);
        ++search_count;
        break;
      default:
        break;
      }
    }
  }
  else
  {
    // Host is specified.
    switch (hints->ai_family)
    {
    case ASIO_OS_DEF(AF_INET):
      search[search_count].host = host;
      search[search_count].family = ASIO_OS_DEF(AF_INET);
      ++search_count;
      break;
    case ASIO_OS_DEF(AF_INET6):
      search[search_count].host = host;
      search[search_count].family = ASIO_OS_DEF(AF_INET6);
      ++search_count;
      break;
    case ASIO_OS_DEF(AF_UNSPEC):
      search[search_count].host = host;
      search[search_count].family = ASIO_OS_DEF(AF_INET6);
      ++search_count;
      search[search_count].host = host;
      search[search_count].family = ASIO_OS_DEF(AF_INET);
      ++search_count;
      break;
    default:
      break;
    }
  }
  return search_count;
}