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common_factor_ct.hpp - Hosted on DriveHQ Cloud IT Platform
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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\math\common_factor_ct.hpp
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// Boost common_factor_ct.hpp header file ----------------------------------// // (C) Copyright Daryle Walker and Stephen Cleary 2001-2002. // 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 http://www.boost.org for updates, documentation, and revision history. #ifndef BOOST_MATH_COMMON_FACTOR_CT_HPP #define BOOST_MATH_COMMON_FACTOR_CT_HPP #include
// self include #include
// for BOOST_STATIC_CONSTANT, etc. namespace boost { namespace math { // Implementation details --------------------------------------------------// namespace detail { #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION // Build GCD with Euclid's recursive algorithm template < unsigned long Value1, unsigned long Value2 > struct static_gcd_helper_t { private: BOOST_STATIC_CONSTANT( unsigned long, new_value1 = Value2 ); BOOST_STATIC_CONSTANT( unsigned long, new_value2 = Value1 % Value2 ); #ifndef __BORLANDC__ #define BOOST_DETAIL_GCD_HELPER_VAL(Value) static_cast
(Value) #else typedef static_gcd_helper_t self_type; #define BOOST_DETAIL_GCD_HELPER_VAL(Value) (self_type:: Value ) #endif typedef static_gcd_helper_t< BOOST_DETAIL_GCD_HELPER_VAL(new_value1), BOOST_DETAIL_GCD_HELPER_VAL(new_value2) > next_step_type; #undef BOOST_DETAIL_GCD_HELPER_VAL public: BOOST_STATIC_CONSTANT( unsigned long, value = next_step_type::value ); }; // Non-recursive case template < unsigned long Value1 > struct static_gcd_helper_t< Value1, 0UL > { BOOST_STATIC_CONSTANT( unsigned long, value = Value1 ); }; #else // Use inner class template workaround from Peter Dimov template < unsigned long Value1 > struct static_gcd_helper2_t { template < unsigned long Value2 > struct helper { BOOST_STATIC_CONSTANT( unsigned long, value = static_gcd_helper2_t
::BOOST_NESTED_TEMPLATE helper
::value ); }; template < > struct helper< 0UL > { BOOST_STATIC_CONSTANT( unsigned long, value = Value1 ); }; }; // Special case template < > struct static_gcd_helper2_t< 0UL > { template < unsigned long Value2 > struct helper { BOOST_STATIC_CONSTANT( unsigned long, value = Value2 ); }; }; // Build the GCD from the above template(s) template < unsigned long Value1, unsigned long Value2 > struct static_gcd_helper_t { BOOST_STATIC_CONSTANT( unsigned long, value = static_gcd_helper2_t
::BOOST_NESTED_TEMPLATE helper
::value ); }; #endif #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION // Build the LCM from the GCD template < unsigned long Value1, unsigned long Value2 > struct static_lcm_helper_t { typedef static_gcd_helper_t
gcd_type; BOOST_STATIC_CONSTANT( unsigned long, value = Value1 / gcd_type::value * Value2 ); }; // Special case for zero-GCD values template < > struct static_lcm_helper_t< 0UL, 0UL > { BOOST_STATIC_CONSTANT( unsigned long, value = 0UL ); }; #else // Adapt GCD's inner class template workaround for LCM template < unsigned long Value1 > struct static_lcm_helper2_t { template < unsigned long Value2 > struct helper { typedef static_gcd_helper_t
gcd_type; BOOST_STATIC_CONSTANT( unsigned long, value = Value1 / gcd_type::value * Value2 ); }; template < > struct helper< 0UL > { BOOST_STATIC_CONSTANT( unsigned long, value = 0UL ); }; }; // Special case template < > struct static_lcm_helper2_t< 0UL > { template < unsigned long Value2 > struct helper { BOOST_STATIC_CONSTANT( unsigned long, value = 0UL ); }; }; // Build the LCM from the above template(s) template < unsigned long Value1, unsigned long Value2 > struct static_lcm_helper_t { BOOST_STATIC_CONSTANT( unsigned long, value = static_lcm_helper2_t
::BOOST_NESTED_TEMPLATE helper
::value ); }; #endif } // namespace detail // Compile-time greatest common divisor evaluator class declaration --------// template < unsigned long Value1, unsigned long Value2 > struct static_gcd { BOOST_STATIC_CONSTANT( unsigned long, value = (detail::static_gcd_helper_t
::value) ); }; // boost::math::static_gcd // Compile-time least common multiple evaluator class declaration ----------// template < unsigned long Value1, unsigned long Value2 > struct static_lcm { BOOST_STATIC_CONSTANT( unsigned long, value = (detail::static_lcm_helper_t
::value) ); }; // boost::math::static_lcm } // namespace math } // namespace boost #endif // BOOST_MATH_COMMON_FACTOR_CT_HPP
common_factor_ct.hpp
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