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add lround, llround

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This commit is contained in:
bolero-MURAKAMI 2012-07-05 08:03:32 +09:00
parent 77f058a34c
commit 36fe60bec3
7 changed files with 140 additions and 28 deletions
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14
sprout/math/ceil.hpp
View file

@ -7,6 +7,7 @@
#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 {
@ -15,8 +16,7 @@ namespace sprout {
template<typename FloatType>
inline SPROUT_CONSTEXPR FloatType
ceil_impl(FloatType x, FloatType x0) {
return x - x0 < std::numeric_limits<FloatType>::epsilon()
? x0
return x - x0 < std::numeric_limits<FloatType>::epsilon() ? x0
: x0 + 1
;
}
@ -26,11 +26,11 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR FloatType
ceil(FloatType x) {
return std::numeric_limits<std::uintmax_t>::max() < x || std::numeric_limits<std::uintmax_t>::max() < -x
? throw std::domain_error("ceil: Sorry, not implemented.")
: x < 0
? -static_cast<FloatType>(static_cast<std::uintmax_t>(-x))
: sprout::math::detail::ceil_impl(x, static_cast<FloatType>(static_cast<std::uintmax_t>(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("ceil: Sorry, not implemented.")
: x < 0 ? -static_cast<FloatType>(static_cast<std::uintmax_t>(-x))
: sprout::math::detail::ceil_impl(x, static_cast<FloatType>(static_cast<std::uintmax_t>(x)))
;
}

14
sprout/math/floor.hpp
View file

@ -7,6 +7,7 @@
#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 {
@ -15,8 +16,7 @@ namespace sprout {
template<typename FloatType>
inline SPROUT_CONSTEXPR FloatType
floor_impl(FloatType x, FloatType x0) {
return x0 - x < std::numeric_limits<FloatType>::epsilon()
? x0
return x0 - x < std::numeric_limits<FloatType>::epsilon() ? x0
: x0 - 1
;
}
@ -26,11 +26,11 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR FloatType
floor(FloatType x) {
return std::numeric_limits<std::uintmax_t>::max() < x || std::numeric_limits<std::uintmax_t>::max() < -x
? throw std::domain_error("floor: Sorry, not implemented.")
: x < 0
? sprout::math::detail::floor_impl(x, -static_cast<FloatType>(static_cast<std::uintmax_t>(-x)))
: static_cast<FloatType>(static_cast<std::uintmax_t>(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("floor: Sorry, not implemented.")
: x < 0 ? sprout::math::detail::floor_impl(x, -static_cast<FloatType>(static_cast<std::uintmax_t>(-x)))
: static_cast<FloatType>(static_cast<std::uintmax_t>(x))
;
}

55
sprout/math/llround.hpp Normal file
View file

@ -0,0 +1,55 @@
#ifndef SPROUT_MATH_LLROUND_HPP
#define SPROUT_MATH_LLROUND_HPP
#include <limits>
#include <type_traits>
#include <stdexcept>
#include <sprout/config.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/type_traits/enabler_if.hpp>
namespace sprout {
namespace math {
namespace detail {
template<typename FloatType>
inline SPROUT_CONSTEXPR long long
llround_impl_positive(FloatType x, long long x0) {
return x - x0 < FloatType(0.5) ? x0
: x0 + 1
;
}
template<typename FloatType>
inline SPROUT_CONSTEXPR long long
llround_impl_nagative(FloatType x, long long x0) {
return x0 - x < FloatType(0.5) ? x0
: x0 - 1
;
}
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR long long
llround(FloatType x) {
return x < 0 ? sprout::math::detail::llround_impl_nagative(x, static_cast<long long>(x))
: sprout::math::detail::llround_impl_positive(x, static_cast<long long>(x))
;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR long long
llround(IntType x) {
return static_cast<long long>(x);
}
} // namespacedetailmath
using NS_SPROUT_MATH_DETAIL::llround;
} // namespace math
using sprout::math::llround;
} // namespace sprout
#endif // #ifndef SPROUT_MATH_LLROUND_HPP

55
sprout/math/lround.hpp Normal file
View file

@ -0,0 +1,55 @@
#ifndef SPROUT_MATH_LROUND_HPP
#define SPROUT_MATH_LROUND_HPP
#include <limits>
#include <type_traits>
#include <stdexcept>
#include <sprout/config.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/type_traits/enabler_if.hpp>
namespace sprout {
namespace math {
namespace detail {
template<typename FloatType>
inline SPROUT_CONSTEXPR long
lround_impl_positive(FloatType x, long x0) {
return x - x0 < FloatType(0.5) ? x0
: x0 + 1
;
}
template<typename FloatType>
inline SPROUT_CONSTEXPR long
lround_impl_nagative(FloatType x, long x0) {
return x0 - x < FloatType(0.5) ? x0
: x0 - 1
;
}
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR long
lround(FloatType x) {
return x < 0 ? sprout::math::detail::lround_impl_nagative(x, static_cast<long>(x))
: sprout::math::detail::lround_impl_positive(x, static_cast<long>(x))
;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR long
lround(IntType x) {
return static_cast<long>(x);
}
} // namespacedetailmath
using NS_SPROUT_MATH_DETAIL::lround;
} // namespace math
using sprout::math::lround;
} // namespace sprout
#endif // #ifndef SPROUT_MATH_LROUND_HPP

2
sprout/math/nearest.hpp
View file

@ -6,5 +6,7 @@
#include <sprout/math/floor.hpp>
#include <sprout/math/trunc.hpp>
#include <sprout/math/round.hpp>
#include <sprout/math/lround.hpp>
#include <sprout/math/llround.hpp>
#endif // #ifndef SPROUT_MATH_NEAREST_HPP

17
sprout/math/round.hpp
View file

@ -7,6 +7,7 @@
#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 {
@ -15,16 +16,14 @@ namespace sprout {
template<typename FloatType>
inline SPROUT_CONSTEXPR FloatType
round_impl_positive(FloatType x, FloatType x0) {
return x - x0 < FloatType(0.5)
? x0
return x - x0 < FloatType(0.5) ? x0
: x0 + 1
;
}
template<typename FloatType>
inline SPROUT_CONSTEXPR FloatType
round_impl_nagative(FloatType x, FloatType x0) {
return x0 - x < FloatType(0.5)
? x0
return x0 - x < FloatType(0.5) ? x0
: x0 - 1
;
}
@ -34,11 +33,11 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR FloatType
round(FloatType x) {
return std::numeric_limits<std::uintmax_t>::max() < x || std::numeric_limits<std::uintmax_t>::max() < -x
? throw std::domain_error("round: Sorry, not implemented.")
: x < 0
? sprout::math::detail::round_impl_nagative(x, -static_cast<FloatType>(static_cast<std::uintmax_t>(-x)))
: sprout::math::detail::round_impl_positive(x, static_cast<FloatType>(static_cast<std::uintmax_t>(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("round: Sorry, not implemented.")
: x < 0 ? sprout::math::detail::round_impl_nagative(x, -static_cast<FloatType>(static_cast<std::uintmax_t>(-x)))
: sprout::math::detail::round_impl_positive(x, static_cast<FloatType>(static_cast<std::uintmax_t>(x)))
;
}

11
sprout/math/trunc.hpp
View file

@ -7,6 +7,7 @@
#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 {
@ -18,11 +19,11 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR FloatType
trunc(FloatType x) {
return 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))
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))
;
}