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shuffle3/lean/include/rng/xoroshiro128plus.hpp

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#pragma once
#include "impl.hpp"
#include <debug.h>
namespace rng
{
struct xoroshiro128plus : public RNG
{
using State = std::array<std::uint64_t, 2>;
#define P D_dprintf("xorng: seeded with (%lu, %lu)", state[0], state[1]);
inline constexpr xoroshiro128plus(std::uint64_t s0, std::uint64_t s1) : state({s0, s1}){P}
inline constexpr xoroshiro128plus(std::array<std::uint64_t, 2>&& ar) : state(ar){P}
inline constexpr xoroshiro128plus(const std::array<std::uint64_t, 2>& ar) : state(ar){P}
inline constexpr xoroshiro128plus(const std::uint64_t (&ar)[2]) : state({ar[0], ar[1]}){P}
#undef P
std::uint64_t next_ulong();
using RNG::next_long;
std::int64_t next_long() override;
void jump();
void long_jump();
protected:
double sample() override;
private:
State state;
};
}