mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-12-25 21:35:41 +00:00
82 lines
2.2 KiB
C++
82 lines
2.2 KiB
C++
#ifndef SPROUT_CSTDLIB_DIV_HPP
|
||
#define SPROUT_CSTDLIB_DIV_HPP
|
||
|
||
#include <cstddef>
|
||
#include <cstdlib>
|
||
#include <type_traits>
|
||
#include <sprout/config.hpp>
|
||
|
||
namespace sprout {
|
||
// Copyright (C) 2011 RiSK (sscrisk)
|
||
|
||
namespace detail {
|
||
# define SPROUT_DIV_T_TRAITS_IMPL(DIV_T) \
|
||
typedef DIV_T type; \
|
||
static SPROUT_CONSTEXPR std::size_t offsetof_quot = offsetof(DIV_T, quot); \
|
||
static SPROUT_CONSTEXPR std::size_t offsetof_rem = offsetof(DIV_T, rem)
|
||
|
||
template<typename T>
|
||
struct div_t_traits {};
|
||
template<>
|
||
struct div_t_traits<int> {
|
||
public:
|
||
SPROUT_DIV_T_TRAITS_IMPL(std::div_t);
|
||
};
|
||
template<>
|
||
struct div_t_traits<long> {
|
||
public:
|
||
SPROUT_DIV_T_TRAITS_IMPL(std::ldiv_t);
|
||
};
|
||
template<>
|
||
struct div_t_traits<long long> {
|
||
public:
|
||
SPROUT_DIV_T_TRAITS_IMPL(std::lldiv_t);
|
||
};
|
||
# undef SPROUT_DIV_T_TRAITS_IMPL
|
||
|
||
extern void* enabler;
|
||
|
||
template<
|
||
typename T,
|
||
typename std::enable_if<
|
||
sprout::detail::div_t_traits<T>::offsetof_quot == 0
|
||
>::type*& = sprout::detail::enabler
|
||
>
|
||
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,
|
||
typename std::enable_if<
|
||
sprout::detail::div_t_traits<T>::offsetof_rem == 0
|
||
>::type*& = sprout::detail::enabler
|
||
>
|
||
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‹y‚Ñ lldiv ŠÖ<C5A0>”
|
||
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);
|
||
}
|
||
|
||
SPROUT_CONSTEXPR std::lldiv_t lldiv(long long numer, long long denom) {
|
||
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
|