mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-12-25 21:35:41 +00:00
46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
#ifndef SPROUT_MATH_TRUNC_HPP
|
|
#define SPROUT_MATH_TRUNC_HPP
|
|
|
|
#include <cstdint>
|
|
#include <limits>
|
|
#include <type_traits>
|
|
#include <stdexcept>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/math/detail/config.hpp>
|
|
#include <sprout/math/isinf.hpp>
|
|
#include <sprout/type_traits/enabler_if.hpp>
|
|
|
|
namespace sprout {
|
|
namespace math {
|
|
namespace detail {
|
|
template<
|
|
typename FloatType,
|
|
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR FloatType
|
|
trunc(FloatType x) {
|
|
return sprout::math::isinf(x) ? x
|
|
: std::numeric_limits<std::uintmax_t>::max() < x || std::numeric_limits<std::uintmax_t>::max() < -x
|
|
? throw std::domain_error("trunc: Sorry, not implemented.")
|
|
: x < 0 ? -static_cast<FloatType>(static_cast<std::uintmax_t>(-x))
|
|
: static_cast<FloatType>(static_cast<std::uintmax_t>(x))
|
|
;
|
|
}
|
|
|
|
template<
|
|
typename IntType,
|
|
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR double
|
|
trunc(IntType x) {
|
|
return sprout::math::detail::trunc(static_cast<double>(x));
|
|
}
|
|
} // namespace detail
|
|
|
|
using NS_SPROUT_MATH_DETAIL::trunc;
|
|
} // namespace math
|
|
|
|
using sprout::math::trunc;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_MATH_TRUNC_HPP
|