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fix math: rounding function,etc...

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bolero-MURAKAMI 2013-02-10 11:54:54 +09:00
parent 53b99b25f8
commit 434aa8d3c5
22 changed files with 812 additions and 74 deletions
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46
sprout/math/float2_sig_exp.hpp Normal file
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#ifndef SPROUT_MATH_FLOAT2_SIG_EXP_HPP
#define SPROUT_MATH_FLOAT2_SIG_EXP_HPP
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/detail/pow.hpp>
#include <sprout/math/float2_exponent.hpp>
#include <sprout/type_traits/enabler_if.hpp>
#include <sprout/utility/pair/pair.hpp>
namespace sprout {
namespace math {
namespace detail {
template<typename T>
inline SPROUT_CONSTEXPR sprout::pair<T, int>
float2_sig_exp_impl(T x, int exp) {
return sprout::pair<T, int>(x / sprout::detail::pow_n(T(2), 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>
float2_sig_exp(FloatType x) {
return sprout::math::detail::float2_sig_exp_impl(x, sprout::math::float2_exponent(x));
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR sprout::pair<double, int>
float2_sig_exp(IntType x) {
return sprout::math::detail::float2_sig_exp(static_cast<double>(x));
}
} // namespace detail
using sprout::math::detail::float2_sig_exp;
} // namespace math
using sprout::math::float2_sig_exp;
} // namespace sprout
#endif // #ifndef SPROUT_MATH_FLOAT2_SIG_EXP_HPP