mirror/Sprout
1
0
Fork 0
mirror of https://github.com/bolero-MURAKAMI/Sprout.git synced 2025-07-14 15:04:09 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

add sprout/math/comparison.hpp

Browse source
This commit is contained in:
bolero-MURAKAMI 2012-07-06 23:10:49 +09:00
parent d51bd06eda
commit 1c65d59971
20 changed files with 379 additions and 109 deletions
Download patch file Download diff file Expand all files Collapse all files

58
sprout/math/equal_to.hpp Normal file
View file

@ -0,0 +1,58 @@
#ifndef SPROUT_MATH_EQUAL_TO_HPP
#define SPROUT_MATH_EQUAL_TO_HPP
#include <limits>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/algorithm/max.hpp>
#include <sprout/math/abs.hpp>
#include <sprout/math/float_promote.hpp>
#include <sprout/type_traits/enabler_if.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,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR bool
equal_to(FloatType x, FloatType y) {
return x == y
|| sprout::abs(x - y)
<= std::numeric_limits<FloatType>::epsilon() * sprout::math::detail::max3(std::abs(x), std::abs(y), FloatType(1.0))
;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR bool
equal_to(IntType x, IntType y) {
return x == y;
}
} // namespace detail
//
// equal_to
//
template<
typename T1,
typename T2,
typename sprout::enabler_if<std::is_arithmetic<T1>::value && std::is_arithmetic<T2>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR bool
equal_to(T1 x, T2 y) {
typedef typename sprout::math::float_promote<T1, T2>::type promoted;
return sprout::math::detail::equal_to<promoted>(x, y);
}
} // namespace math
} // namespace sprout
#endif // #ifndef SPROUT_MATH_EQUAL_TO_HPP