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38 lines
1.2 KiB
C++
38 lines
1.2 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2016 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_COMPLEX_LOG2_HPP
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#define SPROUT_COMPLEX_LOG2_HPP
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#include <sprout/config.hpp>
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#include <sprout/math/constants.hpp>
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#include <sprout/math/isnan.hpp>
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#include <sprout/complex/complex.hpp>
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#include <sprout/complex/operators.hpp>
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#include <sprout/complex/log.hpp>
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namespace sprout {
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//
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// log2
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//
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namespace detail {
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template<typename T>
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inline SPROUT_CONSTEXPR sprout::complex<T>
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log2_impl(sprout::complex<T> const& z) {
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return sprout::math::isnan(z.real()) || sprout::math::isnan(z.imag()) ? z
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: z / sprout::math::ln_two<T>()
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;
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}
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} // namespace detail
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template<typename T>
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inline SPROUT_CONSTEXPR sprout::complex<T>
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log2(sprout::complex<T> const& x) {
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return sprout::detail::log2_impl(sprout::log(x));
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_COMPLEX_LOG2_HPP
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