2012-05-04 05:07:36 +00:00
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#ifndef SPROUT_MATH_TANH_HPP
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#define SPROUT_MATH_TANH_HPP
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2013-02-14 09:02:43 +00:00
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#include <limits>
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2012-05-04 05:07:36 +00:00
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#include <type_traits>
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#include <sprout/config.hpp>
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2012-06-23 04:22:50 +00:00
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#include <sprout/math/detail/config.hpp>
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2012-05-04 05:07:36 +00:00
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#include <sprout/math/sinh.hpp>
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#include <sprout/math/cosh.hpp>
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2012-05-26 15:43:38 +00:00
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#include <sprout/type_traits/enabler_if.hpp>
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2012-05-04 05:07:36 +00:00
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namespace sprout {
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namespace math {
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namespace detail {
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template<
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typename FloatType,
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typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
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>
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inline SPROUT_CONSTEXPR FloatType
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tanh(FloatType x) {
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2013-02-14 09:02:43 +00:00
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return x == 0 ? FloatType(0)
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: x == std::numeric_limits<FloatType>::infinity() ? FloatType(1)
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: x == -std::numeric_limits<FloatType>::infinity() ? FloatType(-1)
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2013-04-23 10:03:03 +00:00
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: sprout::sinh(x) / sprout::cosh(x)
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2013-02-14 09:02:43 +00:00
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;
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2012-05-04 05:07:36 +00:00
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}
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template<
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typename IntType,
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typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
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>
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inline SPROUT_CONSTEXPR double
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tanh(IntType x) {
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return sprout::math::detail::tanh(static_cast<double>(x));
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}
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} // namespace detail
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2012-06-23 04:22:50 +00:00
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using NS_SPROUT_MATH_DETAIL::tanh;
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2012-05-04 05:07:36 +00:00
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} // namespace math
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using sprout::math::tanh;
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} // namespace sprout
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#endif // #ifndef SPROUT_MATH_TANH_HPP
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