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270 | #pragma once
#include <cstdint><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <limits><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <bit><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include "template/debug.hpp"
#include "snippet/aliases.hpp"
#include "internal/dev_env.hpp"
#include "hash/general_hasher.hpp"
// Thanks to: https://prng.di.unimi.it/
namespace uni {
namespace internal {
template<class Derived, class ResultType>
struct random_engine {
using result_type = ResultType;
static constexpr result_type MIN = std::numeric_limits<result_type>::min();
static constexpr result_type MAX = std::numeric_limits<result_type>::max();
static constexpr result_type min() noexcept(NO_EXCEPT) { return MIN; }
static constexpr result_type max() noexcept(NO_EXCEPT) { return MAX; }
template<std::unsigned_integral T = result_type>
constexpr random_engine(const T _seed = 0) noexcept(NO_EXCEPT) {<--- Struct 'random_engine < mulberry32 , std :: uint32_t >' has a constructor with 1 argument that is not explicit. [+]Struct 'random_engine < mulberry32 , std :: uint32_t >' has a constructor with 1 argument that is not explicit. Such, so called "Converting constructors", should in general be explicit for type safety reasons as that prevents unintended implicit conversions. <--- Struct 'random_engine < splitmix64 , std :: uint64_t >' has a constructor with 1 argument that is not explicit. [+]Struct 'random_engine < splitmix64 , std :: uint64_t >' has a constructor with 1 argument that is not explicit. Such, so called "Converting constructors", should in general be explicit for type safety reasons as that prevents unintended implicit conversions. <--- Struct 'random_engine < xoroshiro64ss , std :: uint32_t >' has a constructor with 1 argument that is not explicit. [+]Struct 'random_engine < xoroshiro64ss , std :: uint32_t >' has a constructor with 1 argument that is not explicit. Such, so called "Converting constructors", should in general be explicit for type safety reasons as that prevents unintended implicit conversions. <--- Struct 'random_engine < xoroshiro128ss , std :: uint64_t >' has a constructor with 1 argument that is not explicit. [+]Struct 'random_engine < xoroshiro128ss , std :: uint64_t >' has a constructor with 1 argument that is not explicit. Such, so called "Converting constructors", should in general be explicit for type safety reasons as that prevents unintended implicit conversions. <--- Struct 'random_engine < xoroshiro128pp , std :: uint64_t >' has a constructor with 1 argument that is not explicit. [+]Struct 'random_engine < xoroshiro128pp , std :: uint64_t >' has a constructor with 1 argument that is not explicit. Such, so called "Converting constructors", should in general be explicit for type safety reasons as that prevents unintended implicit conversions. <--- Struct 'random_engine < xoroshiro128p , std :: uint64_t >' has a constructor with 1 argument that is not explicit. [+]Struct 'random_engine < xoroshiro128p , std :: uint64_t >' has a constructor with 1 argument that is not explicit. Such, so called "Converting constructors", should in general be explicit for type safety reasons as that prevents unintended implicit conversions. <--- Struct 'random_engine < xoroshiro64s , std :: uint32_t >' has a constructor with 1 argument that is not explicit. [+]Struct 'random_engine < xoroshiro64s , std :: uint32_t >' has a constructor with 1 argument that is not explicit. Such, so called "Converting constructors", should in general be explicit for type safety reasons as that prevents unintended implicit conversions.
static_cast<Derived*>(this)->seed(_seed);
};
inline constexpr result_type operator()() noexcept(NO_EXCEPT) {
return static_cast<Derived*>(this)->next();
}
};
const i64 INTERNAL_RANDOM_GENERATOR_ID = -(1UL << 60);
}; // namespace internal
constexpr float to_float(const std::uint32_t x) noexcept(NO_EXCEPT) {
return float(x >> 8) * 0x1.0p-24f;
}
constexpr double to_double(const std::uint64_t x) noexcept(NO_EXCEPT) {
return double(x >> 11) * 0x1.0p-53;
}
struct mulberry32 : internal::random_engine<mulberry32, std::uint32_t> {<--- The struct 'mulberry32' does not declare a constructor although it has private member variables which likely require initialization. [+]The struct 'mulberry32' does not declare a constructor although it has private member variables which likely require initialization. Member variables of native types, pointers, or references are left uninitialized when the class is instantiated. That may cause bugs or undefined behavior.
using internal::random_engine<mulberry32, std::uint32_t>::random_engine;
private:
std::uint32_t _x;
public:
template<std::unsigned_integral T>
inline constexpr void seed(const T x) noexcept(NO_EXCEPT) { this->_x = x; }
inline constexpr std::uint32_t next() noexcept(NO_EXCEPT) {
std::uint32_t z = (this->_x += 0x6D2B79F5U);
z = (z ^ (z >> 15)) * (z | 1U);
z ^= z + (z ^ (z >> 7)) * (z | 61U);
return static_cast<std::uint32_t>(z ^ (z >> 14));
}
};
struct splitmix64 : internal::random_engine<splitmix64, std::uint64_t> {<--- The struct 'splitmix64' does not declare a constructor although it has private member variables which likely require initialization. [+]The struct 'splitmix64' does not declare a constructor although it has private member variables which likely require initialization. Member variables of native types, pointers, or references are left uninitialized when the class is instantiated. That may cause bugs or undefined behavior.
using internal::random_engine<splitmix64, std::uint64_t>::random_engine;
private:
std::uint64_t _x;
public:
template<std::unsigned_integral T>
inline constexpr void seed(const T x) noexcept(NO_EXCEPT) { this->_x = x; }
inline constexpr std::uint64_t next() noexcept(NO_EXCEPT) {
std::uint64_t z = (this->_x += 0x9e3779b97f4a7c15);
z = (z ^ (z >> 30)) * 0xbf58476d1ce4e5b9;
z = (z ^ (z >> 27)) * 0x94d049bb133111eb;
return z ^ (z >> 31);
}
};
// xoroshiro64**
struct xoroshiro64ss : internal::random_engine<xoroshiro64ss, std::uint32_t> {<--- The struct 'xoroshiro64ss' does not declare a constructor although it has private member variables which likely require initialization. [+]The struct 'xoroshiro64ss' does not declare a constructor although it has private member variables which likely require initialization. Member variables of native types, pointers, or references are left uninitialized when the class is instantiated. That may cause bugs or undefined behavior.
using internal::random_engine<xoroshiro64ss, std::uint32_t>::random_engine;
private:
std::uint32_t s[2];
public:
template<std::unsigned_integral T>
inline constexpr void seed(const T _seed) noexcept(NO_EXCEPT) {
mulberry32 gen32(hash32(_seed));
this->s[0] = gen32();
this->s[1] = gen32();
}
inline constexpr std::uint32_t next() noexcept(NO_EXCEPT) {
const std::uint32_t s0 = this->s[0];
std::uint32_t s1 = this->s[1];
const std::uint32_t res = std::rotl(s0 * 0x9E3779BBU, 5) * 5;
s1 ^= s0;
this->s[0] = std::rotl(s0, 26) ^ s1 ^ (s1 << 9);
this->s[1] = std::rotl(s1, 13);
return res;
}
};
struct xoroshiro128ss : internal::random_engine<xoroshiro128ss, std::uint64_t> {<--- The struct 'xoroshiro128ss' does not declare a constructor although it has private member variables which likely require initialization. [+]The struct 'xoroshiro128ss' does not declare a constructor although it has private member variables which likely require initialization. Member variables of native types, pointers, or references are left uninitialized when the class is instantiated. That may cause bugs or undefined behavior.
using internal::random_engine<xoroshiro128ss, std::uint64_t>::random_engine;
private:
std::uint64_t s[2];
public:
template<std::unsigned_integral T>
inline constexpr void seed(const T _seed) noexcept(NO_EXCEPT) {
splitmix64 gen64(hash32(_seed));
this->s[0] = gen64();
this->s[1] = gen64();
}
inline constexpr std::uint64_t next() noexcept(NO_EXCEPT) {
const uint64_t s0 = this->s[0];
uint64_t s1 = this->s[1];
const uint64_t res = std::rotl(s0 * 5, 7) * 9;
s1 ^= s0;
this->s[0] = std::rotl(s0, 24) ^ s1 ^ (s1 << 16);
this->s[1] = std::rotl(s1, 37);
return res;
}
};
struct xoroshiro128pp : internal::random_engine<xoroshiro128pp, std::uint64_t> {<--- The struct 'xoroshiro128pp' does not declare a constructor although it has private member variables which likely require initialization. [+]The struct 'xoroshiro128pp' does not declare a constructor although it has private member variables which likely require initialization. Member variables of native types, pointers, or references are left uninitialized when the class is instantiated. That may cause bugs or undefined behavior.
using internal::random_engine<xoroshiro128pp, std::uint64_t>::random_engine;
private:
std::uint64_t s[2];
public:
template<std::unsigned_integral T>
inline constexpr void seed(const T _seed) noexcept(NO_EXCEPT) {
splitmix64 gen64(hash32(_seed));
this->s[0] = gen64();
this->s[1] = gen64();
}
inline constexpr std::uint64_t next() noexcept(NO_EXCEPT) {
const std::uint64_t s0 = this->s[0];
std::uint64_t s1 = this->s[1];
const std::uint64_t res = std::rotl(s0 + s1, 17) + s0;
s1 ^= s0;
this->s[0] = std::rotl(s0, 49) ^ s1 ^ (s1 << 21); // a, b
this->s[1] = std::rotl(s1, 28); // c
return res;
}
};
// xoroshiro128+
struct xoroshiro128p : internal::random_engine<xoroshiro128p, std::uint64_t> {<--- The struct 'xoroshiro128p' does not declare a constructor although it has private member variables which likely require initialization. [+]The struct 'xoroshiro128p' does not declare a constructor although it has private member variables which likely require initialization. Member variables of native types, pointers, or references are left uninitialized when the class is instantiated. That may cause bugs or undefined behavior.
using internal::random_engine<xoroshiro128p, std::uint64_t>::random_engine;
private:
std::uint64_t s[2];
public:
template<std::unsigned_integral T>
inline constexpr void seed(const T _seed) noexcept(NO_EXCEPT) {
splitmix64 gen64(hash64(_seed));
this->s[0] = gen64();
this->s[1] = gen64();
}
inline constexpr std::uint64_t next() noexcept(NO_EXCEPT) {
const std::uint64_t s0 = this->s[0];
std::uint64_t s1 = this->s[1];
const std::uint64_t res = s0 + s1;
s1 ^= s0;
this->s[0] = std::rotl(s0, 24) ^ s1 ^ (s1 << 16);
this->s[1] = std::rotl(s1, 37);
return res;
}
};
struct xoroshiro64s : internal::random_engine<xoroshiro64s, std::uint32_t> {<--- The struct 'xoroshiro64s' does not declare a constructor although it has private member variables which likely require initialization. [+]The struct 'xoroshiro64s' does not declare a constructor although it has private member variables which likely require initialization. Member variables of native types, pointers, or references are left uninitialized when the class is instantiated. That may cause bugs or undefined behavior.
using internal::random_engine<xoroshiro64s, std::uint32_t>::random_engine;
private:
std::uint32_t s[2];
public:
template<std::unsigned_integral T>
inline constexpr void seed(const T _seed) noexcept(NO_EXCEPT) {
mulberry32 gen32(hash32(_seed));
this->s[0] = gen32();
this->s[1] = gen32();
}
inline constexpr std::uint32_t next() noexcept(NO_EXCEPT) {
const std::uint32_t s0 = s[0];
std::uint32_t s1 = s[1];
const std::uint32_t res = s0 * 0x9E3779BB;
s1 ^= s0;
s[0] = std::rotl(s0, 26) ^ s1 ^ (s1 << 9);
s[1] = std::rotl(s1, 13);
return res;
}
};
using random_engine_32bit = xoroshiro64ss;
using random_engine_64bit = xoroshiro128pp;
using random_engine_float = xoroshiro64s;
using random_engine_double = xoroshiro128p;
random_engine_32bit randi32;
random_engine_64bit randi64;
float randf() {
static random_engine_float gen;
return to_float(gen());
}
double randd() {
static random_engine_double gen;
return to_double(gen());
}
} // namespace uni
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