text: //
  // ip/detail/endpoint.hpp
  // ~~~~~~~~~~~~~~~~~~~~~~
  //
  // Copyright (c) 2003-2013 Christopher M. Kohlhoff (chris at kohlhoff dot com)
  //
  // Distributed under the Boost Software License, Version 1.0. (See accompanying
  // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  //
  
  #ifndef BOOST_ASIO_IP_DETAIL_ENDPOINT_HPP
  #define BOOST_ASIO_IP_DETAIL_ENDPOINT_HPP
  
  #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  # pragma once
  #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  
  #include <boost/asio/detail/config.hpp>
  #include <string>
  #include <boost/asio/detail/socket_types.hpp>
  #include <boost/asio/detail/winsock_init.hpp>
  #include <boost/system/error_code.hpp>
  #include <boost/asio/ip/address.hpp>
  
  #include <boost/asio/detail/push_options.hpp>
  
  namespace boost {
  namespace asio {
  namespace ip {
  namespace detail {
  
  // Helper class for implementating an IP endpoint.
  class endpoint
  {
  public:
    // Default constructor.
    BOOST_ASIO_DECL endpoint();
  
    // Construct an endpoint using a family and port number.
    BOOST_ASIO_DECL endpoint(int family, unsigned short port_num);
  
    // Construct an endpoint using an address and port number.
    BOOST_ASIO_DECL endpoint(const boost::asio::ip::address& addr,
        unsigned short port_num);
  
    // Copy constructor.
    endpoint(const endpoint& other)
      : data_(other.data_)
    {
    }
  
    // Assign from another endpoint.
    endpoint& operator=(const endpoint& other)
    {
      data_ = other.data_;
      return *this;
    }
  
    // Get the underlying endpoint in the native type.
    boost::asio::detail::socket_addr_type* data()
    {
      return &data_.base;
    }
  
    // Get the underlying endpoint in the native type.
    const boost::asio::detail::socket_addr_type* data() const
    {
      return &data_.base;
    }
  
    // Get the underlying size of the endpoint in the native type.
    std::size_t size() const
    {
      if (is_v4())
        return sizeof(boost::asio::detail::sockaddr_in4_type);
      else
        return sizeof(boost::asio::detail::sockaddr_in6_type);
    }
  
    // Set the underlying size of the endpoint in the native type.
    BOOST_ASIO_DECL void resize(std::size_t new_size);
  
    // Get the capacity of the endpoint in the native type.
    std::size_t capacity() const
    {
      return sizeof(data_);
    }
  
    // Get the port associated with the endpoint.
    BOOST_ASIO_DECL unsigned short port() const;
  
    // Set the port associated with the endpoint.
    BOOST_ASIO_DECL void port(unsigned short port_num);
  
    // Get the IP address associated with the endpoint.
    BOOST_ASIO_DECL boost::asio::ip::address address() const;
  
    // Set the IP address associated with the endpoint.
    BOOST_ASIO_DECL void address(const boost::asio::ip::address& addr);
  
    // Compare two endpoints for equality.
    BOOST_ASIO_DECL friend bool operator==(
        const endpoint& e1, const endpoint& e2);
  
    // Compare endpoints for ordering.
    BOOST_ASIO_DECL friend bool operator<(
        const endpoint& e1, const endpoint& e2);
  
    // Determine whether the endpoint is IPv4.
    bool is_v4() const
    {
      return data_.base.sa_family == AF_INET;
    }
  
  #if !defined(BOOST_ASIO_NO_IOSTREAM)
    // Convert to a string.
    BOOST_ASIO_DECL std::string to_string(boost::system::error_code& ec) const;
  #endif // !defined(BOOST_ASIO_NO_IOSTREAM)
  
  private:
    // The underlying IP socket address.
    union data_union
    {
      boost::asio::detail::socket_addr_type base;
      boost::asio::detail::sockaddr_in4_type v4;
      boost::asio::detail::sockaddr_in6_type v6;
    } data_;
  };
  
  } // namespace detail
  } // namespace ip
  } // namespace asio
  } // namespace boost
  
  #include <boost/asio/detail/pop_options.hpp>
  
  //#if defined(BOOST_ASIO_HEADER_ONLY)
  //# include <boost/asio/ip/detail/impl/endpoint.ipp>
  //#endif // defined(BOOST_ASIO_HEADER_ONLY)
  
  #endif // BOOST_ASIO_IP_DETAIL_ENDPOINT_HPP
  