ceph/src/boost/libs/asio/include/boost/asio/ip/resolver_query_base.hpp

   1 //
   2 // ip/resolver_query_base.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef BOOST_ASIO_IP_RESOLVER_QUERY_BASE_HPP
  12 #define BOOST_ASIO_IP_RESOLVER_QUERY_BASE_HPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/config.hpp>
  19 #include <boost/asio/detail/socket_types.hpp>
  20
  21 #include <boost/asio/detail/push_options.hpp>
  22
  23 namespace boost {
  24 namespace asio {
  25 namespace ip {
  26
  27 /// The resolver_query_base class is used as a base for the
  28 /// basic_resolver_query class templates to provide a common place to define
  29 /// the flag constants.
  30 class resolver_query_base
  31 {
  32 public:
  33 #if defined(GENERATING_DOCUMENTATION)
  34   /// A bitmask type (C++ Std [lib.bitmask.types]).
  35   typedef unspecified flags;
  36
  37   /// Determine the canonical name of the host specified in the query.
  38   static const flags canonical_name = implementation_defined;
  39
  40   /// Indicate that returned endpoint is intended for use as a locally bound
  41   /// socket endpoint.
  42   static const flags passive = implementation_defined;
  43
  44   /// Host name should be treated as a numeric string defining an IPv4 or IPv6
  45   /// address and no name resolution should be attempted.
  46   static const flags numeric_host = implementation_defined;
  47
  48   /// Service name should be treated as a numeric string defining a port number
  49   /// and no name resolution should be attempted.
  50   static const flags numeric_service = implementation_defined;
  51
  52   /// If the query protocol family is specified as IPv6, return IPv4-mapped
  53   /// IPv6 addresses on finding no IPv6 addresses.
  54   static const flags v4_mapped = implementation_defined;
  55
  56   /// If used with v4_mapped, return all matching IPv6 and IPv4 addresses.
  57   static const flags all_matching = implementation_defined;
  58
  59   /// Only return IPv4 addresses if a non-loopback IPv4 address is configured
  60   /// for the system. Only return IPv6 addresses if a non-loopback IPv6 address
  61   /// is configured for the system.
  62   static const flags address_configured = implementation_defined;
  63 #else
  64   enum flags
  65   {
  66     canonical_name = BOOST_ASIO_OS_DEF(AI_CANONNAME),
  67     passive = BOOST_ASIO_OS_DEF(AI_PASSIVE),
  68     numeric_host = BOOST_ASIO_OS_DEF(AI_NUMERICHOST),
  69     numeric_service = BOOST_ASIO_OS_DEF(AI_NUMERICSERV),
  70     v4_mapped = BOOST_ASIO_OS_DEF(AI_V4MAPPED),
  71     all_matching = BOOST_ASIO_OS_DEF(AI_ALL),
  72     address_configured = BOOST_ASIO_OS_DEF(AI_ADDRCONFIG)
  73   };
  74
  75   // Implement bitmask operations as shown in C++ Std [lib.bitmask.types].
  76
  77   friend flags operator&(flags x, flags y)
  78   {
  79     return static_cast<flags>(
  80         static_cast<unsigned int>(x) & static_cast<unsigned int>(y));
  81   }
  82
  83   friend flags operator|(flags x, flags y)
  84   {
  85     return static_cast<flags>(
  86         static_cast<unsigned int>(x) | static_cast<unsigned int>(y));
  87   }
  88
  89   friend flags operator^(flags x, flags y)
  90   {
  91     return static_cast<flags>(
  92         static_cast<unsigned int>(x) ^ static_cast<unsigned int>(y));
  93   }
  94
  95   friend flags operator~(flags x)
  96   {
  97     return static_cast<flags>(~static_cast<unsigned int>(x));
  98   }
  99
 100   friend flags& operator&=(flags& x, flags y)
 101   {
 102     x = x & y;
 103     return x;
 104   }
 105
 106   friend flags& operator|=(flags& x, flags y)
 107   {
 108     x = x | y;
 109     return x;
 110   }
 111
 112   friend flags& operator^=(flags& x, flags y)
 113   {
 114     x = x ^ y;
 115     return x;
 116   }
 117 #endif
 118
 119 protected:
 120   /// Protected destructor to prevent deletion through this type.
 121   ~resolver_query_base()
 122   {
 123   }
 124 };
 125
 126 } // namespace ip
 127 } // namespace asio
 128 } // namespace boost
 129
 130 #include <boost/asio/detail/pop_options.hpp>
 131
 132 #endif // BOOST_ASIO_IP_RESOLVER_QUERY_BASE_HPP