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#pragma once
#include "../common.h"
#include "../rng.h"
#include "../mem.h"
namespace rng
{
struct crand final : public Random
{
// This range is inclusive
constexpr static inline i64 RANGE_MIN = - (1L << 31);
constexpr static inline i64 RANGE_MAX = (1L << 31) - 1;
crand();
crand(u64 seed);
inline ~crand(){}
inline i64 next_i64() override { return _sample_raw(); }
u64 next_u64() override;
protected:
inline constexpr i64 _max_i64() const override { return RANGE_MAX; }
inline constexpr u64 _max_u64() const override { return (u64)RANGE_MAX; }
// the rest of the base `_max_*` functions are valid, as they will always be equal to or less than INT32_MAX (the upper bound of dr48.)
f64 _sample() override;
private:
struct _opaque;
struct _deleter { static void delete_object(_opaque** st); };
mem::aligned_ptr<_opaque, _deleter> _state;
explicit crand(_opaque* raw);
i64 _sample_raw();
};
}