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fix math functions

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This commit is contained in:
bolero-MURAKAMI 2013-04-26 00:25:35 +09:00
parent dad3acceea
commit 2e2b6c96ab
30 changed files with 121 additions and 84 deletions
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18
sprout/math/fractional_part.hpp
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@ -5,24 +5,34 @@
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/math/copysign.hpp>
#include <sprout/math/isnan.hpp>
#include <sprout/math/integer_part.hpp>
#include <sprout/type_traits/enabler_if.hpp>
namespace sprout {
namespace math {
namespace detail {
template<typename T>
inline SPROUT_CONSTEXPR T
fractional_part_impl(T x, T ipart) {
return x == ipart ? T(0) * x
: sprout::math::copysign(x - ipart, x)
;
}
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
fractional_part(FloatType x) {
return x == std::numeric_limits<FloatType>::infinity() || x == -std::numeric_limits<FloatType>::infinity() ? FloatType(0)
: x == std::numeric_limits<FloatType>::quiet_NaN() ? std::numeric_limits<FloatType>::quiet_NaN()
: x - sprout::integer_part(x)
return x == std::numeric_limits<FloatType>::infinity() || x == -std::numeric_limits<FloatType>::infinity() ? sprout::math::copysign(FloatType(0), x)
: sprout::math::isnan(x) ? std::numeric_limits<FloatType>::quiet_NaN()
: x == 0 ? x
: sprout::math::detail::fractional_part_impl(x, sprout::integer_part(x))
;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler