Uniform random number generator. More...

#include <xoshiro256starstaruniformrng.hpp>

Collaboration diagram for Xoshiro256StarStarUniformRng:

Public Types
typedef Sample< Real >	sample_type

Public Member Functions
	Xoshiro256StarStarUniformRng (std::uint64_t seed=0)

	Xoshiro256StarStarUniformRng (std::uint64_t s0, std::uint64_t s1, std::uint64_t s2, std::uint64_t s3)

sample_type	next () const

Real	nextReal () const
	return a random number in the (0.0, 1.0)-interval More...

std::uint64_t	nextInt64 () const
	return a random integer in the [0,0xffffffffffffffffULL]-interval More...

Static Private Member Functions
static std::uint64_t	rotl (std::uint64_t x, std::int32_t k)

Private Attributes
std::uint64_t	s0_

std::uint64_t	s1_

std::uint64_t	s2_

std::uint64_t	s3_

Detailed Description

Uniform random number generator.

xoshiro256** random number generator of period 2**256-1

For more details see https://prng.di.unimi.it/ and its reference implementation https://prng.di.unimi.it/xoshiro256starstar.c

Tests:: the correctness of the returned values is tested by checking them against the reference implementation in c.

Definition at line 56 of file xoshiro256starstaruniformrng.hpp.

Member Typedef Documentation

◆ sample_type

typedef Sample<Real> sample_type

Definition at line 58 of file xoshiro256starstaruniformrng.hpp.

Constructor & Destructor Documentation

◆ Xoshiro256StarStarUniformRng() [1/2]

Xoshiro256StarStarUniformRng ( std::uint64_t seed = 0 )

explicit

If the given seed is 0, a random seed will be chosen based on clock().

Definition at line 54 of file xoshiro256starstaruniformrng.cpp.

Here is the call graph for this function:

◆ Xoshiro256StarStarUniformRng() [2/2]

Xoshiro256StarStarUniformRng	(	std::uint64_t	s0,
		std::uint64_t	s1,
		std::uint64_t	s2,
		std::uint64_t	s3
	)

Make sure that s0, s1, s2 and s3 are chosen randomly. Otherwise, the results of the first random numbers might not be well distributed. Especially s0 = s1 = s2 = s3 = 0 does not work and will always return 0.

Definition at line 62 of file xoshiro256starstaruniformrng.cpp.