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workaround for no c++11 numeric_limits

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bolero-MURAKAMI 2013-08-07 00:15:09 +09:00
parent ce16e24637
commit 7a1974742a
110 changed files with 727 additions and 436 deletions
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8
sprout/math/trunc.hpp
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@ -2,10 +2,10 @@
#define SPROUT_MATH_TRUNC_HPP
#include <cstdint>
#include <limits>
#include <type_traits>
#include <stdexcept>
#include <sprout/config.hpp>
#include <sprout/limits.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/math/isnan.hpp>
#include <sprout/type_traits/enabler_if.hpp>
@ -20,13 +20,13 @@ namespace sprout {
inline SPROUT_CONSTEXPR FloatType
trunc(FloatType x) {
return sprout::math::isnan(x) ? x
: x == std::numeric_limits<FloatType>::infinity() ? std::numeric_limits<FloatType>::infinity()
: x == -std::numeric_limits<FloatType>::infinity() ? -std::numeric_limits<FloatType>::infinity()
: x == sprout::numeric_limits<FloatType>::infinity() ? sprout::numeric_limits<FloatType>::infinity()
: x == -sprout::numeric_limits<FloatType>::infinity() ? -sprout::numeric_limits<FloatType>::infinity()
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
: std::trunc(x)
#else
: x == 0 ? x
: std::numeric_limits<std::uintmax_t>::max() < x || std::numeric_limits<std::uintmax_t>::max() < -x
: sprout::numeric_limits<std::uintmax_t>::max() < x || sprout::numeric_limits<std::uintmax_t>::max() < -x
? SPROUT_MATH_THROW_LARGE_FLOAT_ROUNDING(std::runtime_error("trunc: large float rounding."), x)
: x < 0 ? -static_cast<FloatType>(static_cast<std::uintmax_t>(-x))
: static_cast<FloatType>(static_cast<std::uintmax_t>(x))