Sprout/sprout/cstdlib/div.hpp

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#ifndef SPROUT_CSTDLIB_DIV_HPP
#define SPROUT_CSTDLIB_DIV_HPP
#include <cstddef>
#include <cstdlib>
#include <type_traits>
#include <sprout/config.hpp>
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#include <sprout/type_traits/enabler_if.hpp>
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namespace sprout {
// Copyright (C) 2011 RiSK (sscrisk)
namespace detail {
template<typename T>
struct div_t_traits {};
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# define SPROUT_DETAIL_DIV_T_TRAITS_IMPL(INT_T, DIV_T) \
template<> \
struct div_t_traits<INT_T> { \
public: \
typedef DIV_T type; \
SPROUT_STATIC_CONSTEXPR std::size_t offsetof_quot = offsetof(DIV_T, quot); \
SPROUT_STATIC_CONSTEXPR std::size_t offsetof_rem = offsetof(DIV_T, rem); \
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}
SPROUT_DETAIL_DIV_T_TRAITS_IMPL(int, std::div_t);
SPROUT_DETAIL_DIV_T_TRAITS_IMPL(long, std::ldiv_t);
SPROUT_DETAIL_DIV_T_TRAITS_IMPL(long long, std::lldiv_t);
# undef SPROUT_DETAIL_DIV_T_TRAITS_IMPL
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template<
typename T,
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typename sprout::enabler_if<
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sprout::detail::div_t_traits<T>::offsetof_quot == 0
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>::type = sprout::enabler
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>
SPROUT_CONSTEXPR typename sprout::detail::div_t_traits<T>::type div_impl(T const& numer, T const& denom) {
return {numer / denom, numer % denom};
}
template<
typename T,
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typename sprout::enabler_if<
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sprout::detail::div_t_traits<T>::offsetof_rem == 0
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>::type = sprout::enabler
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>
SPROUT_CONSTEXPR typename sprout::detail::div_t_traits<T>::type div_impl(T const &numer, T const& denom) {
return {numer % denom, numer / denom};
}
} // namespace detail
// 7.20.6.2 div<69>Cldiv<69>C<EFBFBD>y<EFBFBD><79> lldiv <20>֐<EFBFBD>
SPROUT_CONSTEXPR std::div_t div(int numer, int denom) {
return sprout::detail::div_impl(numer, denom);
}
SPROUT_CONSTEXPR std::ldiv_t ldiv(long numer, long denom) {
return sprout::detail::div_impl(numer, denom);
}
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SPROUT_CONSTEXPR std::lldiv_t lldiv(long long numer, long long denom) {
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return sprout::detail::div_impl(numer, denom);
}
SPROUT_CONSTEXPR std::ldiv_t div(long numer, long denom) {
return sprout::ldiv(numer, denom);
}
SPROUT_CONSTEXPR std::lldiv_t div(long long numer, long long denom) {
return sprout::lldiv(numer, denom);
}
} // namespace sprout
#endif // #ifndef SPROUT_CSTDLIB_DIV_HPP