| // |
| // ip/resolver_query_base.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2015 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 ASIO_IP_RESOLVER_QUERY_BASE_HPP |
| #define ASIO_IP_RESOLVER_QUERY_BASE_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| #include "asio/detail/socket_types.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace ip { |
| |
| /// The resolver_query_base class is used as a base for the |
| /// basic_resolver_query class templates to provide a common place to define |
| /// the flag constants. |
| class resolver_query_base |
| { |
| public: |
| #if defined(GENERATING_DOCUMENTATION) |
| /// A bitmask type (C++ Std [lib.bitmask.types]). |
| typedef unspecified flags; |
| |
| /// Determine the canonical name of the host specified in the query. |
| static const flags canonical_name = implementation_defined; |
| |
| /// Indicate that returned endpoint is intended for use as a locally bound |
| /// socket endpoint. |
| static const flags passive = implementation_defined; |
| |
| /// Host name should be treated as a numeric string defining an IPv4 or IPv6 |
| /// address and no name resolution should be attempted. |
| static const flags numeric_host = implementation_defined; |
| |
| /// Service name should be treated as a numeric string defining a port number |
| /// and no name resolution should be attempted. |
| static const flags numeric_service = implementation_defined; |
| |
| /// If the query protocol family is specified as IPv6, return IPv4-mapped |
| /// IPv6 addresses on finding no IPv6 addresses. |
| static const flags v4_mapped = implementation_defined; |
| |
| /// If used with v4_mapped, return all matching IPv6 and IPv4 addresses. |
| static const flags all_matching = implementation_defined; |
| |
| /// Only return IPv4 addresses if a non-loopback IPv4 address is configured |
| /// for the system. Only return IPv6 addresses if a non-loopback IPv6 address |
| /// is configured for the system. |
| static const flags address_configured = implementation_defined; |
| #else |
| enum flags |
| { |
| canonical_name = ASIO_OS_DEF(AI_CANONNAME), |
| passive = ASIO_OS_DEF(AI_PASSIVE), |
| numeric_host = ASIO_OS_DEF(AI_NUMERICHOST), |
| numeric_service = ASIO_OS_DEF(AI_NUMERICSERV), |
| v4_mapped = ASIO_OS_DEF(AI_V4MAPPED), |
| all_matching = ASIO_OS_DEF(AI_ALL), |
| address_configured = ASIO_OS_DEF(AI_ADDRCONFIG) |
| }; |
| |
| // Implement bitmask operations as shown in C++ Std [lib.bitmask.types]. |
| |
| friend flags operator&(flags x, flags y) |
| { |
| return static_cast<flags>( |
| static_cast<unsigned int>(x) & static_cast<unsigned int>(y)); |
| } |
| |
| friend flags operator|(flags x, flags y) |
| { |
| return static_cast<flags>( |
| static_cast<unsigned int>(x) | static_cast<unsigned int>(y)); |
| } |
| |
| friend flags operator^(flags x, flags y) |
| { |
| return static_cast<flags>( |
| static_cast<unsigned int>(x) ^ static_cast<unsigned int>(y)); |
| } |
| |
| friend flags operator~(flags x) |
| { |
| return static_cast<flags>(~static_cast<unsigned int>(x)); |
| } |
| |
| friend flags& operator&=(flags& x, flags y) |
| { |
| x = x & y; |
| return x; |
| } |
| |
| friend flags& operator|=(flags& x, flags y) |
| { |
| x = x | y; |
| return x; |
| } |
| |
| friend flags& operator^=(flags& x, flags y) |
| { |
| x = x ^ y; |
| return x; |
| } |
| #endif |
| |
| protected: |
| /// Protected destructor to prevent deletion through this type. |
| ~resolver_query_base() |
| { |
| } |
| }; |
| |
| } // namespace ip |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // ASIO_IP_RESOLVER_QUERY_BASE_HPP |