mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
#ifndef SPROUT_MATH_ACOSH_HPP
|
|
#define SPROUT_MATH_ACOSH_HPP
|
|
|
|
#include <limits>
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/math/detail/config.hpp>
|
|
#include <sprout/math/detail/float_compute.hpp>
|
|
#include <sprout/math/log.hpp>
|
|
#include <sprout/math/sqrt.hpp>
|
|
#include <sprout/type_traits/enabler_if.hpp>
|
|
|
|
namespace sprout {
|
|
namespace math {
|
|
namespace detail {
|
|
template<typename T>
|
|
inline SPROUT_CONSTEXPR T
|
|
acosh_impl(T x) {
|
|
return sprout::math::log(x + sprout::math::sqrt(x * x - 1));
|
|
}
|
|
|
|
template<
|
|
typename FloatType,
|
|
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR FloatType
|
|
acosh(FloatType x) {
|
|
return x < 1 ? std::numeric_limits<FloatType>::quiet_NaN()
|
|
: x == std::numeric_limits<FloatType>::infinity() ? std::numeric_limits<FloatType>::infinity()
|
|
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
|
|
: std::acosh(x)
|
|
#else
|
|
: x == 1 ? FloatType(0)
|
|
: static_cast<FloatType>(sprout::math::detail::acosh_impl(static_cast<typename sprout::math::detail::float_compute<FloatType>::type>(x)))
|
|
#endif
|
|
;
|
|
}
|
|
template<
|
|
typename IntType,
|
|
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR double
|
|
acosh(IntType x) {
|
|
return sprout::math::detail::acosh(static_cast<double>(x));
|
|
}
|
|
} // namespace detail
|
|
|
|
using sprout::math::detail::acosh;
|
|
} // namespace math
|
|
|
|
using sprout::math::acosh;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_MATH_ACOSH_HPP
|