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Sprout/sprout/math/quotient.hpp
2015-01-10 19:13:57 +09:00

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2.2 KiB
C++

/*=============================================================================
Copyright (c) 2011-2015 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_QUOTIENT_HPP
#define SPROUT_MATH_QUOTIENT_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/signbit.hpp>
#include <sprout/math/rem_quo.hpp>
#include <sprout/type_traits/enabler_if.hpp>
#include <sprout/type_traits/float_promote.hpp>
namespace sprout {
namespace math {
//
// quotient
//
template<
typename R = int,
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value && std::is_integral<R>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR R
quotient(FloatType x, FloatType y) {
return y == 0 ? R(0)
: sprout::math::isnan(y) || sprout::math::isnan(x) ? R(0)
: x == sprout::numeric_limits<FloatType>::infinity() || x == -sprout::numeric_limits<FloatType>::infinity()
? R(0)
: x == 0 ? R(0)
: y == sprout::numeric_limits<FloatType>::infinity() || y == -sprout::numeric_limits<FloatType>::infinity() ? R(0)
: sprout::math::rem_quo<R>(x, y).second
;
}
template<
typename R = int,
typename ArithmeticType1,
typename ArithmeticType2,
typename sprout::enabler_if<
std::is_arithmetic<ArithmeticType1>::value && std::is_arithmetic<ArithmeticType2>::value && std::is_integral<R>::value
>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR R
quotient(ArithmeticType1 x, ArithmeticType2 y) {
typedef typename sprout::float_promote<ArithmeticType1, ArithmeticType2>::type type;
return sprout::math::quotient(static_cast<type>(x), static_cast<type>(y));
}
} // namespace math
using sprout::math::quotient;
} // namespace sprout
#endif // #ifndef SPROUT_MATH_QUOTIENT_HPP