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add sprout::asinh, acosh, atanh

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bolero-MURAKAMI 2012-05-05 00:24:10 +09:00
parent 435e6511b0
commit 8dadcb359a
4 changed files with 146 additions and 0 deletions
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48
sprout/math/acosh.hpp Normal file
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#ifndef SPROUT_MATH_ACOSH_HPP
#define SPROUT_MATH_ACOSH_HPP
#include <limits>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/math/log.hpp>
#include <sprout/math/sqrt.hpp>
#include <sprout/utility/enabler_if.hpp>
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
# include <cmath>
#endif
namespace sprout {
namespace math {
namespace detail {
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()
: sprout::math::detail::log(x + sprout::math::detail::sqrt(x * x - 1))
;
}
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
# if SPROUT_USE_BUILTIN_CMATH_FUNCTION
using std::acosh;
# else
using sprout::math::detail::acosh;
# endif
} // namespace math
using sprout::math::acosh;
} // namespace sprout
#endif // #ifndef SPROUT_MATH_ACOSH_HPP