mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
39 lines
1.2 KiB
C++
39 lines
1.2 KiB
C++
|
/*=============================================================================
|
||
|
|
Copyright (c) 2011-2014 Bolero MURAKAMI
|
||
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
||
|
|
|
||
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||
|
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||
|
|
=============================================================================*/
|
||
|
|
#ifndef SPROUT_COMPLEX_LOG2_HPP
|
||
|
|
#define SPROUT_COMPLEX_LOG2_HPP
|
||
|
|
|
||
|
|
#include <sprout/config.hpp>
|
||
|
|
#include <sprout/math/constants.hpp>
|
||
|
|
#include <sprout/math/isnan.hpp>
|
||
|
|
#include <sprout/complex/complex.hpp>
|
||
|
|
#include <sprout/complex/operators.hpp>
|
||
|
|
#include <sprout/complex/log.hpp>
|
||
|
|
|
||
|
|
namespace sprout {
|
||
|
|
//
|
||
|
|
// log2
|
||
|
|
//
|
||
|
|
namespace detail {
|
||
|
|
template<typename T>
|
||
|
|
inline SPROUT_CONSTEXPR sprout::complex<T>
|
||
|
|
log2_impl(sprout::complex<T> const& z) {
|
||
|
|
return sprout::math::isnan(z.real()) || sprout::math::isnan(z.imag()) ? z
|
||
|
|
: z / sprout::math::ln_two<T>()
|
||
|
|
;
|
||
|
|
}
|
||
|
|
} // namespace detail
|
||
|
|
template<typename T>
|
||
|
|
inline SPROUT_CONSTEXPR sprout::complex<T>
|
||
|
|
log2(sprout::complex<T> const& x) {
|
||
|
|
return sprout::detail::log2_impl(sprout::log(x));
|
||
|
|
}
|
||
|
|
} // namespace sprout
|
||
|
|
|
||
|
|
#endif // #ifndef SPROUT_COMPLEX_LOG2_HPP
|