733 lines
20 KiB
C++
733 lines
20 KiB
C++
#ifndef BOOST_SYSTEM_DETAIL_ERROR_CODE_HPP_INCLUDED
|
|
#define BOOST_SYSTEM_DETAIL_ERROR_CODE_HPP_INCLUDED
|
|
|
|
// Copyright Beman Dawes 2006, 2007
|
|
// Copyright Christoper Kohlhoff 2007
|
|
// Copyright Peter Dimov 2017-2021
|
|
//
|
|
// 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)
|
|
//
|
|
// See library home page at http://www.boost.org/libs/system
|
|
|
|
#include <boost/system/is_error_code_enum.hpp>
|
|
#include <boost/system/detail/error_category.hpp>
|
|
#include <boost/system/detail/error_condition.hpp>
|
|
#include <boost/system/detail/system_category.hpp>
|
|
#include <boost/system/detail/system_category_impl.hpp>
|
|
#include <boost/system/detail/interop_category.hpp>
|
|
#include <boost/system/detail/enable_if.hpp>
|
|
#include <boost/system/detail/is_same.hpp>
|
|
#include <boost/system/detail/append_int.hpp>
|
|
#include <boost/system/detail/snprintf.hpp>
|
|
#include <boost/system/detail/config.hpp>
|
|
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
# include <boost/system/detail/std_category.hpp>
|
|
#endif
|
|
|
|
#include <boost/assert/source_location.hpp>
|
|
#include <boost/cstdint.hpp>
|
|
#include <boost/config.hpp>
|
|
#include <boost/config/workaround.hpp>
|
|
#include <ostream>
|
|
#include <new>
|
|
#include <cstdio>
|
|
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
# include <system_error>
|
|
#endif
|
|
|
|
#if defined(BOOST_GCC) && BOOST_GCC >= 40600 && BOOST_GCC < 70000
|
|
# pragma GCC diagnostic push
|
|
# pragma GCC diagnostic ignored "-Wstrict-aliasing"
|
|
#endif
|
|
|
|
namespace boost
|
|
{
|
|
|
|
namespace system
|
|
{
|
|
|
|
// class error_code
|
|
|
|
// We want error_code to be a value type that can be copied without slicing
|
|
// and without requiring heap allocation, but we also want it to have
|
|
// polymorphic behavior based on the error category. This is achieved by
|
|
// abstract base class error_category supplying the polymorphic behavior,
|
|
// and error_code containing a pointer to an object of a type derived
|
|
// from error_category.
|
|
|
|
bool operator==( const error_code & code, const error_condition & condition ) BOOST_NOEXCEPT;
|
|
std::size_t hash_value( error_code const & ec );
|
|
|
|
class error_code
|
|
{
|
|
private:
|
|
|
|
friend bool operator==( const error_code & code, const error_condition & condition ) BOOST_NOEXCEPT;
|
|
friend std::size_t hash_value( error_code const & ec );
|
|
|
|
private:
|
|
|
|
struct data
|
|
{
|
|
int val_;
|
|
const error_category * cat_;
|
|
};
|
|
|
|
union
|
|
{
|
|
data d1_;
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
unsigned char d2_[ sizeof(std::error_code) ];
|
|
#endif
|
|
};
|
|
|
|
// 0: default constructed, d1_ value initialized
|
|
// 1: holds std::error_code in d2_
|
|
// 2: holds error code in d1_, failed == false
|
|
// 3: holds error code in d1_, failed == true
|
|
// >3: pointer to source_location, failed_ in lsb
|
|
boost::uintptr_t lc_flags_;
|
|
|
|
private:
|
|
|
|
char const* category_name() const BOOST_NOEXCEPT
|
|
{
|
|
// return category().name();
|
|
|
|
if( lc_flags_ == 0 )
|
|
{
|
|
// must match detail::system_error_category::name()
|
|
return "system";
|
|
}
|
|
else if( lc_flags_ == 1 )
|
|
{
|
|
// must match detail::interop_error_category::name()
|
|
return "std:unknown";
|
|
}
|
|
else
|
|
{
|
|
return d1_.cat_->name();
|
|
}
|
|
}
|
|
|
|
public:
|
|
|
|
// constructors:
|
|
|
|
#if !BOOST_WORKAROUND(BOOST_GCC, < 40800)
|
|
BOOST_CONSTEXPR
|
|
#endif
|
|
error_code() BOOST_NOEXCEPT:
|
|
d1_(), lc_flags_( 0 )
|
|
{
|
|
}
|
|
|
|
BOOST_SYSTEM_CONSTEXPR error_code( int val, const error_category & cat ) BOOST_NOEXCEPT:
|
|
d1_(), lc_flags_( 2 + detail::failed_impl( val, cat ) )
|
|
{
|
|
d1_.val_ = val;
|
|
d1_.cat_ = &cat;
|
|
}
|
|
|
|
error_code( int val, const error_category & cat, source_location const * loc ) BOOST_NOEXCEPT:
|
|
d1_(), lc_flags_( ( loc? reinterpret_cast<boost::uintptr_t>( loc ): 2 ) | +detail::failed_impl( val, cat ) )
|
|
{
|
|
d1_.val_ = val;
|
|
d1_.cat_ = &cat;
|
|
}
|
|
|
|
template<class ErrorCodeEnum> BOOST_SYSTEM_CONSTEXPR error_code( ErrorCodeEnum e,
|
|
typename detail::enable_if<
|
|
is_error_code_enum<ErrorCodeEnum>::value
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
|| std::is_error_code_enum<ErrorCodeEnum>::value
|
|
#endif
|
|
>::type* = 0 ) BOOST_NOEXCEPT: d1_(), lc_flags_( 0 )
|
|
{
|
|
*this = make_error_code( e );
|
|
}
|
|
|
|
error_code( error_code const& ec, source_location const * loc ) BOOST_NOEXCEPT:
|
|
d1_(), lc_flags_( 0 )
|
|
{
|
|
*this = ec;
|
|
|
|
if( ec.lc_flags_ != 0 && ec.lc_flags_ != 1 )
|
|
{
|
|
lc_flags_ = ( loc? reinterpret_cast<boost::uintptr_t>( loc ): 2 ) | ( ec.lc_flags_ & 1 );
|
|
}
|
|
}
|
|
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
|
|
error_code( std::error_code const& ec ) BOOST_NOEXCEPT:
|
|
d1_(), lc_flags_( 0 )
|
|
{
|
|
#ifndef BOOST_NO_RTTI
|
|
|
|
if( detail::std_category const* pc2 = dynamic_cast< detail::std_category const* >( &ec.category() ) )
|
|
{
|
|
*this = boost::system::error_code( ec.value(), pc2->original_category() );
|
|
}
|
|
else
|
|
|
|
#endif
|
|
{
|
|
::new( d2_ ) std::error_code( ec );
|
|
lc_flags_ = 1;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
// modifiers:
|
|
|
|
BOOST_SYSTEM_CONSTEXPR void assign( int val, const error_category & cat ) BOOST_NOEXCEPT
|
|
{
|
|
*this = error_code( val, cat );
|
|
}
|
|
|
|
void assign( int val, const error_category & cat, source_location const * loc ) BOOST_NOEXCEPT
|
|
{
|
|
*this = error_code( val, cat, loc );
|
|
}
|
|
|
|
void assign( error_code const& ec, source_location const * loc ) BOOST_NOEXCEPT
|
|
{
|
|
*this = error_code( ec, loc );
|
|
}
|
|
|
|
template<typename ErrorCodeEnum>
|
|
BOOST_SYSTEM_CONSTEXPR typename detail::enable_if<is_error_code_enum<ErrorCodeEnum>::value, error_code>::type &
|
|
operator=( ErrorCodeEnum val ) BOOST_NOEXCEPT
|
|
{
|
|
*this = make_error_code( val );
|
|
return *this;
|
|
}
|
|
|
|
BOOST_SYSTEM_CONSTEXPR void clear() BOOST_NOEXCEPT
|
|
{
|
|
*this = error_code();
|
|
}
|
|
|
|
// observers:
|
|
|
|
BOOST_SYSTEM_CONSTEXPR int value() const BOOST_NOEXCEPT
|
|
{
|
|
if( lc_flags_ != 1 )
|
|
{
|
|
return d1_.val_;
|
|
}
|
|
else
|
|
{
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
|
|
std::error_code const& ec = *reinterpret_cast<std::error_code const*>( d2_ );
|
|
|
|
unsigned cv = static_cast<unsigned>( ec.value() );
|
|
unsigned ch = static_cast<unsigned>( reinterpret_cast<boost::uintptr_t>( &ec.category() ) % 2097143 ); // 2^21-9, prime
|
|
|
|
return static_cast<int>( cv + 1000 * ch );
|
|
#else
|
|
|
|
return -1;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
BOOST_SYSTEM_CONSTEXPR const error_category & category() const BOOST_NOEXCEPT
|
|
{
|
|
if( lc_flags_ == 0 )
|
|
{
|
|
return system_category();
|
|
}
|
|
else if( lc_flags_ == 1 )
|
|
{
|
|
return detail::interop_category();
|
|
}
|
|
else
|
|
{
|
|
return *d1_.cat_;
|
|
}
|
|
}
|
|
|
|
// deprecated?
|
|
error_condition default_error_condition() const BOOST_NOEXCEPT
|
|
{
|
|
return category().default_error_condition( value() );
|
|
}
|
|
|
|
std::string message() const
|
|
{
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
|
|
if( lc_flags_ == 1 )
|
|
{
|
|
std::error_code const& ec = *reinterpret_cast<std::error_code const*>( d2_ );
|
|
return ec.message();
|
|
}
|
|
|
|
#endif
|
|
|
|
if( lc_flags_ == 0 )
|
|
{
|
|
return detail::system_error_category_message( value() );
|
|
}
|
|
else
|
|
{
|
|
return category().message( value() );
|
|
}
|
|
}
|
|
|
|
char const * message( char * buffer, std::size_t len ) const BOOST_NOEXCEPT
|
|
{
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
if( lc_flags_ == 1 )
|
|
{
|
|
std::error_code const& ec = *reinterpret_cast<std::error_code const*>( d2_ );
|
|
|
|
#if !defined(BOOST_NO_EXCEPTIONS)
|
|
try
|
|
#endif
|
|
{
|
|
detail::snprintf( buffer, len, "%s", ec.message().c_str() );
|
|
return buffer;
|
|
}
|
|
#if !defined(BOOST_NO_EXCEPTIONS)
|
|
catch( ... )
|
|
{
|
|
detail::snprintf( buffer, len, "No message text available for error std:%s:%d", ec.category().name(), ec.value() );
|
|
return buffer;
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
if( lc_flags_ == 0 )
|
|
{
|
|
return detail::system_error_category_message( value(), buffer, len );
|
|
}
|
|
else
|
|
{
|
|
return category().message( value(), buffer, len );
|
|
}
|
|
}
|
|
|
|
BOOST_SYSTEM_CONSTEXPR bool failed() const BOOST_NOEXCEPT
|
|
{
|
|
if( lc_flags_ & 1 )
|
|
{
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
if( lc_flags_ == 1 )
|
|
{
|
|
std::error_code const& ec = *reinterpret_cast<std::error_code const*>( d2_ );
|
|
return ec.value() != 0;
|
|
}
|
|
#endif
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
#if !defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
|
|
|
|
BOOST_SYSTEM_CONSTEXPR explicit operator bool() const BOOST_NOEXCEPT // true if error
|
|
{
|
|
return failed();
|
|
}
|
|
|
|
#else
|
|
|
|
typedef void (*unspecified_bool_type)();
|
|
static void unspecified_bool_true() {}
|
|
|
|
BOOST_SYSTEM_CONSTEXPR operator unspecified_bool_type() const BOOST_NOEXCEPT // true if error
|
|
{
|
|
return failed()? unspecified_bool_true: 0;
|
|
}
|
|
|
|
BOOST_SYSTEM_CONSTEXPR bool operator!() const BOOST_NOEXCEPT // true if no error
|
|
{
|
|
return !failed();
|
|
}
|
|
|
|
#endif
|
|
|
|
bool has_location() const BOOST_NOEXCEPT
|
|
{
|
|
return lc_flags_ >= 4;
|
|
}
|
|
|
|
source_location const & location() const BOOST_NOEXCEPT
|
|
{
|
|
BOOST_STATIC_CONSTEXPR source_location loc;
|
|
return lc_flags_ >= 4? *reinterpret_cast<source_location const*>( lc_flags_ &~ static_cast<boost::uintptr_t>( 1 ) ): loc;
|
|
}
|
|
|
|
// relationals:
|
|
|
|
private:
|
|
|
|
// private equality for use in error_category::equivalent
|
|
|
|
friend class error_category;
|
|
|
|
BOOST_SYSTEM_CONSTEXPR bool equals( int val, error_category const& cat ) const BOOST_NOEXCEPT
|
|
{
|
|
if( lc_flags_ == 0 )
|
|
{
|
|
return val == 0 && cat.id_ == detail::system_category_id;
|
|
}
|
|
else if( lc_flags_ == 1 )
|
|
{
|
|
return cat.id_ == detail::interop_category_id && val == value();
|
|
}
|
|
else
|
|
{
|
|
return val == d1_.val_ && cat == *d1_.cat_;
|
|
}
|
|
}
|
|
|
|
public:
|
|
|
|
// the more symmetrical non-member syntax allows enum
|
|
// conversions work for both rhs and lhs.
|
|
|
|
BOOST_SYSTEM_CONSTEXPR inline friend bool operator==( const error_code & lhs, const error_code & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
|
|
bool s1 = lhs.lc_flags_ == 1;
|
|
bool s2 = rhs.lc_flags_ == 1;
|
|
|
|
if( s1 != s2 ) return false;
|
|
|
|
if( s1 && s2 )
|
|
{
|
|
std::error_code const& e1 = *reinterpret_cast<std::error_code const*>( lhs.d2_ );
|
|
std::error_code const& e2 = *reinterpret_cast<std::error_code const*>( rhs.d2_ );
|
|
|
|
return e1 == e2;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
return lhs.value() == rhs.value() && lhs.category() == rhs.category();
|
|
}
|
|
}
|
|
|
|
BOOST_SYSTEM_CONSTEXPR inline friend bool operator<( const error_code & lhs, const error_code & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
|
|
bool s1 = lhs.lc_flags_ == 1;
|
|
bool s2 = rhs.lc_flags_ == 1;
|
|
|
|
if( s1 < s2 ) return true;
|
|
if( s2 < s1 ) return false;
|
|
|
|
if( s1 && s2 )
|
|
{
|
|
std::error_code const& e1 = *reinterpret_cast<std::error_code const*>( lhs.d2_ );
|
|
std::error_code const& e2 = *reinterpret_cast<std::error_code const*>( rhs.d2_ );
|
|
|
|
return e1 < e2;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
return lhs.category() < rhs.category() || (lhs.category() == rhs.category() && lhs.value() < rhs.value());
|
|
}
|
|
}
|
|
|
|
BOOST_SYSTEM_CONSTEXPR inline friend bool operator!=( const error_code & lhs, const error_code & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return !( lhs == rhs );
|
|
}
|
|
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
|
|
inline friend bool operator==( std::error_code const & lhs, error_code const & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return lhs == static_cast< std::error_code >( rhs );
|
|
}
|
|
|
|
inline friend bool operator==( error_code const & lhs, std::error_code const & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return static_cast< std::error_code >( lhs ) == rhs;
|
|
}
|
|
|
|
inline friend bool operator!=( std::error_code const & lhs, error_code const & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return !( lhs == rhs );
|
|
}
|
|
|
|
inline friend bool operator!=( error_code const & lhs, std::error_code const & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return !( lhs == rhs );
|
|
}
|
|
|
|
//
|
|
|
|
template<class E, class N = typename detail::enable_if<std::is_error_condition_enum<E>::value>::type>
|
|
inline friend bool operator==( error_code const & lhs, E rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return lhs == make_error_condition( rhs );
|
|
}
|
|
|
|
template<class E, class N = typename detail::enable_if<std::is_error_condition_enum<E>::value>::type>
|
|
inline friend bool operator==( E lhs, error_code const & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return make_error_condition( lhs ) == rhs;
|
|
}
|
|
|
|
template<class E, class N = typename detail::enable_if<std::is_error_condition_enum<E>::value>::type>
|
|
inline friend bool operator!=( error_code const & lhs, E rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return !( lhs == rhs );
|
|
}
|
|
|
|
template<class E, class N = typename detail::enable_if<std::is_error_condition_enum<E>::value>::type>
|
|
inline friend bool operator!=( E lhs, error_code const & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return !( lhs == rhs );
|
|
}
|
|
|
|
//
|
|
|
|
template<class E, class N1 = void, class N2 = typename detail::enable_if<std::is_error_code_enum<E>::value>::type>
|
|
BOOST_SYSTEM_CONSTEXPR inline friend bool operator==( error_code const & lhs, E rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return lhs == make_error_code( rhs );
|
|
}
|
|
|
|
template<class E, class N1 = void, class N2 = typename detail::enable_if<std::is_error_code_enum<E>::value>::type>
|
|
BOOST_SYSTEM_CONSTEXPR inline friend bool operator==( E lhs, error_code const & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return make_error_code( lhs ) == rhs;
|
|
}
|
|
|
|
template<class E, class N1 = void, class N2 = typename detail::enable_if<std::is_error_code_enum<E>::value>::type>
|
|
BOOST_SYSTEM_CONSTEXPR inline friend bool operator!=( error_code const & lhs, E rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return !( lhs == rhs );
|
|
}
|
|
|
|
template<class E, class N1 = void, class N2 = typename detail::enable_if<std::is_error_code_enum<E>::value>::type>
|
|
BOOST_SYSTEM_CONSTEXPR inline friend bool operator!=( E lhs, error_code const & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return !( lhs == rhs );
|
|
}
|
|
|
|
#if defined(BOOST_SYSTEM_CLANG_6)
|
|
|
|
inline friend bool operator==( error_code const & lhs, std::error_condition const & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return static_cast< std::error_code >( lhs ) == rhs;
|
|
}
|
|
|
|
inline friend bool operator==( std::error_condition const & lhs, error_code const & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return lhs == static_cast< std::error_code >( rhs );
|
|
}
|
|
|
|
inline friend bool operator!=( error_code const & lhs, std::error_condition const & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return !( lhs == rhs );
|
|
}
|
|
|
|
inline friend bool operator!=( std::error_condition const & lhs, error_code const & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return !( lhs == rhs );
|
|
}
|
|
|
|
#endif
|
|
|
|
// conversions
|
|
|
|
operator std::error_code () const
|
|
{
|
|
if( lc_flags_ == 1 )
|
|
{
|
|
return *reinterpret_cast<std::error_code const*>( d2_ );
|
|
}
|
|
else if( lc_flags_ == 0 )
|
|
{
|
|
// This condition must be the same as the one in error_category_impl.hpp
|
|
#if defined(BOOST_SYSTEM_AVOID_STD_SYSTEM_CATEGORY)
|
|
|
|
return std::error_code( 0, boost::system::system_category() );
|
|
|
|
#else
|
|
|
|
return std::error_code();
|
|
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
return std::error_code( d1_.val_, *d1_.cat_ );
|
|
}
|
|
}
|
|
|
|
operator std::error_code ()
|
|
{
|
|
return const_cast<error_code const&>( *this );
|
|
}
|
|
|
|
template<class T,
|
|
class E = typename detail::enable_if<detail::is_same<T, std::error_code>::value>::type>
|
|
operator T& ()
|
|
{
|
|
if( lc_flags_ != 1 )
|
|
{
|
|
std::error_code e2( *this );
|
|
::new( d2_ ) std::error_code( e2 );
|
|
lc_flags_ = 1;
|
|
}
|
|
|
|
return *reinterpret_cast<std::error_code*>( d2_ );
|
|
}
|
|
|
|
#if defined(BOOST_SYSTEM_CLANG_6)
|
|
|
|
template<class T,
|
|
class E = typename std::enable_if<std::is_same<T, std::error_code>::value>::type>
|
|
operator T const& () = delete;
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|
|
std::string to_string() const
|
|
{
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
|
|
if( lc_flags_ == 1 )
|
|
{
|
|
std::error_code const& e2 = *reinterpret_cast<std::error_code const*>( d2_ );
|
|
|
|
std::string r( "std:" );
|
|
r += e2.category().name();
|
|
detail::append_int( r, e2.value() );
|
|
|
|
return r;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
std::string r = category_name();
|
|
detail::append_int( r, value() );
|
|
return r;
|
|
}
|
|
}
|
|
|
|
template<class Ch, class Tr>
|
|
inline friend std::basic_ostream<Ch, Tr>&
|
|
operator<< (std::basic_ostream<Ch, Tr>& os, error_code const & ec)
|
|
{
|
|
return os << ec.to_string().c_str();
|
|
}
|
|
|
|
std::string what() const
|
|
{
|
|
std::string r = message();
|
|
|
|
r += " [";
|
|
r += to_string();
|
|
|
|
if( has_location() )
|
|
{
|
|
r += " at ";
|
|
r += location().to_string();
|
|
}
|
|
|
|
r += "]";
|
|
return r;
|
|
}
|
|
};
|
|
|
|
inline bool operator==( const error_code & code, const error_condition & condition ) BOOST_NOEXCEPT
|
|
{
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
|
|
if( code.lc_flags_ == 1 )
|
|
{
|
|
return static_cast<std::error_code>( code ) == static_cast<std::error_condition>( condition );
|
|
}
|
|
else
|
|
|
|
#endif
|
|
{
|
|
return code.category().equivalent( code.value(), condition ) || condition.category().equivalent( code, condition.value() );
|
|
}
|
|
}
|
|
|
|
inline bool operator==( const error_condition & condition, const error_code & code ) BOOST_NOEXCEPT
|
|
{
|
|
return code == condition;
|
|
}
|
|
|
|
inline bool operator!=( const error_code & lhs, const error_condition & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return !( lhs == rhs );
|
|
}
|
|
|
|
inline bool operator!=( const error_condition & lhs, const error_code & rhs ) BOOST_NOEXCEPT
|
|
{
|
|
return !( lhs == rhs );
|
|
}
|
|
|
|
inline std::size_t hash_value( error_code const & ec )
|
|
{
|
|
#if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
|
|
|
|
if( ec.lc_flags_ == 1 )
|
|
{
|
|
std::error_code const& e2 = *reinterpret_cast<std::error_code const*>( ec.d2_ );
|
|
return std::hash<std::error_code>()( e2 );
|
|
}
|
|
|
|
#endif
|
|
|
|
error_category const & cat = ec.category();
|
|
|
|
boost::ulong_long_type id_ = cat.id_;
|
|
|
|
if( id_ == 0 )
|
|
{
|
|
id_ = reinterpret_cast<boost::uintptr_t>( &cat );
|
|
}
|
|
|
|
boost::ulong_long_type hv = ( boost::ulong_long_type( 0xCBF29CE4 ) << 32 ) + 0x84222325;
|
|
boost::ulong_long_type const prime = ( boost::ulong_long_type( 0x00000100 ) << 32 ) + 0x000001B3;
|
|
|
|
// id
|
|
|
|
hv ^= id_;
|
|
hv *= prime;
|
|
|
|
// value
|
|
|
|
hv ^= static_cast<unsigned>( ec.value() );
|
|
hv *= prime;
|
|
|
|
return static_cast<std::size_t>( hv );
|
|
}
|
|
|
|
} // namespace system
|
|
|
|
} // namespace boost
|
|
|
|
#if defined(BOOST_GCC) && BOOST_GCC >= 40600 && BOOST_GCC < 70000
|
|
# pragma GCC diagnostic pop
|
|
#endif
|
|
|
|
#endif // #ifndef BOOST_SYSTEM_DETAIL_ERROR_CODE_HPP_INCLUDED
|