/*============================================================================= Copyright (c) 2011-2016 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_MATH_LOG10_HPP #define SPROUT_MATH_LOG10_HPP #include #include #include #include #include #include #include #include #include namespace sprout { namespace math { namespace detail { #if SPROUT_USE_BUILTIN_CMATH_FUNCTION inline SPROUT_CONSTEXPR float builtin_log10(float x) { return __builtin_log10f(x); } inline SPROUT_CONSTEXPR double builtin_log10(double x) { return __builtin_log10(x); } inline SPROUT_CONSTEXPR long double builtin_log10(long double x) { return __builtin_log10l(x); } #endif template inline SPROUT_CONSTEXPR T log10_impl(T x) { return sprout::math::log(x) / sprout::math::ln_ten(); } } // namespace detail // // log10 // template< typename FloatType, typename sprout::enabler_if::value>::type = sprout::enabler > inline SPROUT_CONSTEXPR FloatType log10(FloatType x) { return sprout::math::isnan(x) ? x : x == 0 ? -sprout::numeric_limits::infinity() : x == sprout::numeric_limits::infinity() ? sprout::numeric_limits::infinity() : x < 0 ? sprout::numeric_limits::quiet_NaN() #if SPROUT_USE_BUILTIN_CMATH_FUNCTION : sprout::math::detail::builtin_log10(x) #else : x == 1 ? FloatType(0) : static_cast(sprout::math::detail::log10_impl(static_cast::type>(x))) #endif ; } template< typename IntType, typename sprout::enabler_if::value>::type = sprout::enabler > inline SPROUT_CONSTEXPR double log10(IntType x) { return sprout::math::log10(static_cast(x)); } } // namespace math using sprout::math::log10; } // namespace sprout #endif // #ifndef SPROUT_MATH_LOG10_HPP