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fix: math functions (support for inferior C++14 standard)

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add C++14 constexpr modifying algorithms
This commit is contained in:
bolero-MURAKAMI 2013-10-25 12:29:16 +09:00
parent 58cff54e0d
commit c58c9cc0fc
106 changed files with 3465 additions and 2144 deletions
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82
sprout/math/itrunc.hpp
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@ -22,8 +22,8 @@
namespace sprout {
namespace math {
namespace detail {
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
namespace detail {
template<typename To, typename FloatType>
inline SPROUT_CONSTEXPR To
itrunc_impl(FloatType x) {
@ -32,45 +32,49 @@ namespace sprout {
: static_cast<To>(x)
;
}
template<
typename To = int,
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value && std::is_integral<To>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR To
itrunc(FloatType x) {
return sprout::math::isnan(x) || sprout::math::isinf(x) ? sprout::numeric_limits<To>::min()
: sprout::math::detail::itrunc_impl<To>(sprout::math::trunc(x))
;
}
#else
template<
typename To = int,
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value && std::is_integral<To>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR To
itrunc(FloatType x) {
return sprout::math::isnan(x) || sprout::math::isinf(x) ? sprout::numeric_limits<To>::min()
: x == 0 ? To(0)
: sprout::numeric_limits<To>::max() < x || sprout::numeric_limits<To>::min() > x
? SPROUT_MATH_THROW_LARGE_FLOAT_ROUNDING(std::runtime_error("itrunc: large float rounding."), static_cast<To>(x))
: static_cast<To>(x)
;
}
#endif
template<
typename To = int,
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value && std::is_integral<To>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR To
itrunc(IntType x) {
return sprout::math::detail::itrunc<To>(static_cast<double>(x));
}
} // namespace detail
using sprout::math::detail::itrunc;
//
// itrunc
//
template<
typename To = int,
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value && std::is_integral<To>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR To
itrunc(FloatType x) {
return sprout::math::isnan(x) || sprout::math::isinf(x) ? sprout::numeric_limits<To>::min()
: sprout::math::detail::itrunc_impl<To>(sprout::math::trunc(x))
;
}
#else
//
// itrunc
//
template<
typename To = int,
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value && std::is_integral<To>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR To
itrunc(FloatType x) {
return sprout::math::isnan(x) || sprout::math::isinf(x) ? sprout::numeric_limits<To>::min()
: x == 0 ? To(0)
: sprout::numeric_limits<To>::max() < x || sprout::numeric_limits<To>::min() > x
? SPROUT_MATH_THROW_LARGE_FLOAT_ROUNDING(std::runtime_error("itrunc: large float rounding."), static_cast<To>(x))
: static_cast<To>(x)
;
}
#endif
template<
typename To = int,
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value && std::is_integral<To>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR To
itrunc(IntType x) {
return sprout::math::itrunc<To>(static_cast<double>(x));
}
} // namespace math
using sprout::math::itrunc;