system/detail/std_category_impl.hpp

0001 #ifndef BOOST_SYSTEM_DETAIL_STD_CATEGORY_IMPL_HPP_INCLUDED
0002 #define BOOST_SYSTEM_DETAIL_STD_CATEGORY_IMPL_HPP_INCLUDED
0003
0004 // Support for interoperability between Boost.System and <system_error>
0005 //
0006 // Copyright 2018, 2021 Peter Dimov
0007 //
0008 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0009 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0010 //
0011 // See library home page at http://www.boost.org/libs/system
0012
0013 #include <boost/system/detail/std_category.hpp>
0014 #include <boost/system/detail/error_condition.hpp>
0015 #include <boost/system/detail/error_code.hpp>
0016 #include <boost/system/detail/generic_category.hpp>
0017
0018 //
0019
0020 namespace boost
0021 {
0022
0023 namespace system
0024 {
0025
0026 namespace detail
0027 {
0028
0029 inline bool std_category::equivalent( int code, const std::error_condition & condition ) const BOOST_NOEXCEPT
0030 {
0031     if( condition.category() == *this )
0032     {
0033         boost::system::error_condition bn( condition.value(), *pc_ );
0034         return pc_->equivalent( code, bn );
0035     }
0036     else if( condition.category() == std::generic_category() || condition.category() == boost::system::generic_category() )
0037     {
0038         boost::system::error_condition bn( condition.value(), boost::system::generic_category() );
0039         return pc_->equivalent( code, bn );
0040     }
0041
0042 #ifndef BOOST_NO_RTTI
0043
0044     else if( std_category const* pc2 = dynamic_cast< std_category const* >( &condition.category() ) )
0045     {
0046         boost::system::error_condition bn( condition.value(), *pc2->pc_ );
0047         return pc_->equivalent( code, bn );
0048     }
0049
0050 #endif
0051
0052     else
0053     {
0054         return default_error_condition( code ) == condition;
0055     }
0056 }
0057
0058 inline bool std_category::equivalent( const std::error_code & code, int condition ) const BOOST_NOEXCEPT
0059 {
0060     if( code.category() == *this )
0061     {
0062         boost::system::error_code bc( code.value(), *pc_ );
0063         return pc_->equivalent( bc, condition );
0064     }
0065     else if( code.category() == std::generic_category() || code.category() == boost::system::generic_category() )
0066     {
0067         boost::system::error_code bc( code.value(), boost::system::generic_category() );
0068         return pc_->equivalent( bc, condition );
0069     }
0070
0071 #ifndef BOOST_NO_RTTI
0072
0073     else if( std_category const* pc2 = dynamic_cast< std_category const* >( &code.category() ) )
0074     {
0075         boost::system::error_code bc( code.value(), *pc2->pc_ );
0076         return pc_->equivalent( bc, condition );
0077     }
0078
0079 #endif
0080
0081     else if( *pc_ == boost::system::generic_category() )
0082     {
0083         return std::generic_category().equivalent( code, condition );
0084     }
0085     else
0086     {
0087         return false;
0088     }
0089 }
0090
0091 } // namespace detail
0092
0093 } // namespace system
0094
0095 } // namespace boost
0096
0097 #endif // #ifndef BOOST_SYSTEM_DETAIL_STD_CATEGORY_IMPL_HPP_INCLUDED