/*============================================================================= Copyright (c) 2011-2016 Bolero MURAKAMI https://github.com/bolero-MURAKAMI/Sprout 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 SPROUT_MATH_INTEGER_PART_HPP #define SPROUT_MATH_INTEGER_PART_HPP #include <type_traits> #include <sprout/config.hpp> #include <sprout/limits.hpp> #include <sprout/math/detail/config.hpp> #include <sprout/math/isnan.hpp> #include <sprout/math/trunc.hpp> #include <sprout/type_traits/enabler_if.hpp> namespace sprout { namespace math { // // integer_part // template< typename FloatType, typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler > inline SPROUT_CONSTEXPR FloatType integer_part(FloatType x) { return sprout::math::isnan(x) ? x : x == sprout::numeric_limits<FloatType>::infinity() ? sprout::numeric_limits<FloatType>::infinity() : x == -sprout::numeric_limits<FloatType>::infinity() ? -sprout::numeric_limits<FloatType>::infinity() : x == 0 ? x : sprout::math::trunc(x) ; } template< typename IntType, typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler > inline SPROUT_CONSTEXPR double integer_part(IntType x) { return sprout::math::integer_part(static_cast<double>(x)); } } // namespace math using sprout::math::integer_part; } // namespace sprout #endif // #ifndef SPROUT_MATH_INTEGER_PART_HPP