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fix: math functions (support for inferior C++14 standard)

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add C++14 constexpr modifying algorithms
This commit is contained in:
bolero-MURAKAMI 2013-10-25 12:29:16 +09:00
parent 58cff54e0d
commit c58c9cc0fc
106 changed files with 3465 additions and 2144 deletions
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50
sprout/math/float_sig_exp.hpp
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@ -27,32 +27,32 @@ namespace sprout {
typedef sprout::pair<T, int> type;
return type(x / sprout::detail::pow_n(T(sprout::numeric_limits<T>::radix), exp), exp);
}
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR sprout::pair<FloatType, int>
float_sig_exp(FloatType x) {
typedef sprout::pair<FloatType, int> type;
return sprout::math::isnan(x) ? type(x, 0)
: x == sprout::numeric_limits<FloatType>::infinity() ? type(sprout::numeric_limits<FloatType>::infinity(), 0)
: x == -sprout::numeric_limits<FloatType>::infinity() ? type(-sprout::numeric_limits<FloatType>::infinity(), 0)
: x == 0 ? type(x, 0)
: sprout::math::detail::float_sig_exp_impl(x, sprout::math::ilogb(x) + 1)
;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR sprout::pair<double, int>
float_sig_exp(IntType x) {
return sprout::math::detail::float_sig_exp(static_cast<double>(x));
}
} // namespace detail
using sprout::math::detail::float_sig_exp;
//
// float_sig_exp
//
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR sprout::pair<FloatType, int>
float_sig_exp(FloatType x) {
typedef sprout::pair<FloatType, int> type;
return sprout::math::isnan(x) ? type(x, 0)
: x == sprout::numeric_limits<FloatType>::infinity() ? type(sprout::numeric_limits<FloatType>::infinity(), 0)
: x == -sprout::numeric_limits<FloatType>::infinity() ? type(-sprout::numeric_limits<FloatType>::infinity(), 0)
: x == 0 ? type(x, 0)
: sprout::math::detail::float_sig_exp_impl(x, sprout::math::ilogb(x) + 1)
;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR sprout::pair<double, int>
float_sig_exp(IntType x) {
return sprout::math::float_sig_exp(static_cast<double>(x));
}
} // namespace math
using sprout::math::float_sig_exp;