mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
#ifndef SPROUT_MATH_CEIL_HPP
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#define SPROUT_MATH_CEIL_HPP
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#include <cstdint>
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#include <limits>
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#include <type_traits>
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#include <stdexcept>
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#include <sprout/config.hpp>
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#include <sprout/math/detail/config.hpp>
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#include <sprout/math/isinf.hpp>
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#include <sprout/math/equal_to.hpp>
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#include <sprout/type_traits/enabler_if.hpp>
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namespace sprout {
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namespace math {
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namespace detail {
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template<typename FloatType>
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inline SPROUT_CONSTEXPR FloatType
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ceil_impl(FloatType x, FloatType x0) {
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return sprout::math::equal_to(x, x0) ? x0
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: x0 + 1
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;
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}
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template<
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typename FloatType,
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typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
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>
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inline SPROUT_CONSTEXPR FloatType
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ceil(FloatType x) {
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return sprout::math::isinf(x) ? x
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: std::numeric_limits<std::uintmax_t>::max() < x || std::numeric_limits<std::uintmax_t>::max() < -x
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? SPROUT_MATH_THROW_LARGE_FLOAT_ROUNDING(std::domain_error("ceil: large float rounding."), x)
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: x < 0 ? -static_cast<FloatType>(static_cast<std::uintmax_t>(-x))
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: sprout::math::detail::ceil_impl(x, static_cast<FloatType>(static_cast<std::uintmax_t>(x)))
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;
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}
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template<
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typename IntType,
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typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
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>
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inline SPROUT_CONSTEXPR double
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ceil(IntType x) {
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return sprout::math::detail::ceil(static_cast<double>(x));
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}
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} // namespace detail
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using NS_SPROUT_MATH_DETAIL::ceil;
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} // namespace math
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using sprout::math::ceil;
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} // namespace sprout
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#endif // #ifndef SPROUT_MATH_CEIL_HPP
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