mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
#ifndef SPROUT_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP
|
|
#define SPROUT_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP
|
|
|
|
#include <cstddef>
|
|
#include <cstdint>
|
|
#include <limits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/random/random_result.hpp>
|
|
#include <sprout/random/detail/generator_bits.hpp>
|
|
#include <sprout/detail/integer.hpp>
|
|
#include HDR_ALGORITHM_SSCRISK_CEL_OR_SPROUT
|
|
|
|
namespace sprout {
|
|
namespace random {
|
|
namespace detail {
|
|
template<class URNG>
|
|
class uniform_int_float {
|
|
public:
|
|
typedef URNG base_type;
|
|
typedef typename base_type::result_type base_result;
|
|
typedef typename sprout::detail::uint_t<
|
|
(std::numeric_limits<std::uintmax_t>::digits < std::numeric_limits<base_result>::digits)
|
|
? std::numeric_limits<std::uintmax_t>::digits
|
|
: std::numeric_limits<base_result>::digits
|
|
>::fast result_type;
|
|
private:
|
|
base_type rng_;
|
|
public:
|
|
SPROUT_CONSTEXPR uniform_int_float()
|
|
: rng_()
|
|
{}
|
|
explicit SPROUT_CONSTEXPR uniform_int_float(base_type const& rng)
|
|
: rng_(rng)
|
|
{}
|
|
SPROUT_CONSTEXPR result_type min() const {
|
|
return 0;
|
|
}
|
|
SPROUT_CONSTEXPR result_type max() const {
|
|
return (
|
|
result_type(2) << (
|
|
NS_SSCRISK_CEL_OR_SPROUT::min(
|
|
std::numeric_limits<result_type>::digits,
|
|
sprout::random::detail::generator_bits<base_type>::value()
|
|
) - 1
|
|
)
|
|
) - 1
|
|
;
|
|
}
|
|
base_type& base() {
|
|
return rng_;
|
|
}
|
|
SPROUT_CONSTEXPR base_type const& base() const {
|
|
return rng_;
|
|
}
|
|
SPROUT_CONSTEXPR sprout::random::random_result<uniform_int_float> generate(
|
|
sprout::random::random_result<base_type> const& rnd
|
|
) const
|
|
{
|
|
return sprout::random::random_result<uniform_int_float>(
|
|
static_cast<result_type>(rnd.result() * (static_cast<base_result>(max()) + 1)),
|
|
uniform_int_float(rnd.engine())
|
|
);
|
|
}
|
|
SPROUT_CONSTEXPR sprout::random::random_result<uniform_int_float> operator()() const {
|
|
return generate(rng_());
|
|
}
|
|
};
|
|
} // namespace detail
|
|
} // namespace random
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_RANDOM_DETAIL_UNIFORM_INT_FLOAT_HPP
|