mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2015 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_EQUAL_TO_HPP
|
|
#define SPROUT_MATH_EQUAL_TO_HPP
|
|
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/limits.hpp>
|
|
#include <sprout/math/fabs.hpp>
|
|
#include <sprout/type_traits/arithmetic_promote.hpp>
|
|
#include <sprout/type_traits/enabler_if.hpp>
|
|
#include <sprout/algorithm/detail/max.hpp>
|
|
|
|
namespace sprout {
|
|
namespace math {
|
|
namespace detail {
|
|
template<typename T>
|
|
inline SPROUT_CONSTEXPR T
|
|
max3(T x, T y, T z) {
|
|
return sprout::max(sprout::max(x, y), z);
|
|
}
|
|
|
|
template<typename FloatType>
|
|
inline SPROUT_CONSTEXPR bool
|
|
equal_to_impl(FloatType x, FloatType y) {
|
|
return x == y
|
|
|| sprout::fabs(x - y)
|
|
<= sprout::numeric_limits<FloatType>::epsilon() * sprout::math::detail::max3(sprout::fabs(x), sprout::fabs(y), FloatType(1))
|
|
;
|
|
}
|
|
|
|
template<
|
|
typename FloatType1, typename FloatType2,
|
|
typename sprout::enabler_if<
|
|
std::is_floating_point<typename sprout::arithmetic_promote<FloatType1, FloatType2>::type>::value
|
|
>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR bool
|
|
equal_to(FloatType1 x, FloatType2 y) {
|
|
typedef typename sprout::arithmetic_promote<FloatType1, FloatType2>::type type;
|
|
return sprout::math::detail::equal_to_impl<type>(x, y);
|
|
}
|
|
|
|
template<
|
|
typename IntType1, typename IntType2,
|
|
typename sprout::enabler_if<
|
|
std::is_integral<typename sprout::arithmetic_promote<IntType1, IntType2>::type>::value
|
|
>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR bool
|
|
equal_to(IntType1 x, IntType2 y) {
|
|
return x == y;
|
|
}
|
|
} // namespace detail
|
|
//
|
|
// equal_to
|
|
//
|
|
template<
|
|
typename T, typename U,
|
|
typename sprout::enabler_if<std::is_arithmetic<T>::value && std::is_arithmetic<U>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR bool
|
|
equal_to(T x, U y) {
|
|
return sprout::math::detail::equal_to(x, y);
|
|
}
|
|
} // namespace math
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_MATH_EQUAL_TO_HPP
|