theoretica::PRNG Class Reference

A pseudorandom number generator. More...

#include <prng.h>

Public Member Functions
	PRNG (pseudorandom_function p, uint64_t seed, const std::vector< uint64_t > &s)
	Construct a PRNG with the given generating algorithm p, seed x and parameters s.
	PRNG (pseudorandom_function p, uint64_t seed)
	Construct a PRNG with the given generating algorithm and seed.
	PRNG (uint64_t seed)
	Construct a PRNG with the default generator and the given seed.
void	seed (uint64_t seed)
	Seed the PRNG.
uint64_t	next ()
	Generate a pseudorandom number.
uint64_t	operator() ()
	Generate a pseudorandom number.
void	discard (uint64_t n)
	Discard n numbers from the generator.
uint64_t	last () const
	Return the last generated number.
void	set_function (pseudorandom_function p)
	Set the generating function.
pseudorandom_function	get_function () const
	Get the generating function.
void	set_param (const std::vector< uint64_t > &v)
	Set the generator's parameters.
void	set_param (unsigned int i, uint64_t value)
	Set a specific parameter by index.
std::vector< uint64_t >	get_param () const
	Get the generator's parameters.
PRNG &	operator>> (uint64_t &n)
	Stream the next generated number.

Static Public Member Functions
static PRNG	linear_congruential (uint64_t seed=1)
	Returns a standard linear congruential generator.
static PRNG	xoshiro (const std::vector< uint64_t > &p)
	Returns a Xoshiro256++ generator.
static PRNG	xoshiro (uint64_t seed=1)
	Returns a Xoshiro256++ generator.
static PRNG	splitmix64 (uint64_t seed=1)
	Returns a Splitmix64 generator.
static PRNG	wyrand (uint64_t seed=1, uint64_t p1=2549536629329, uint64_t p2=136137137)
	Returns a Wyrand generator.
static PRNG	middlesquare (uint64_t seed, uint64_t offset=765872292751861)
	Returns a Middle-square generator.

Detailed Description

A pseudorandom number generator.

Member Function Documentation

discard()

void theoretica::PRNG::discard ( uint64_t  n )

inline

Discard n numbers from the generator.

Equivalent to calling next() n times.

linear_congruential()

static PRNG theoretica::PRNG::linear_congruential ( uint64_t  seed = 1 )

inlinestatic

Returns a standard linear congruential generator.

Parameters

seed	The seed to use for the generator (defaults to 1)

Returns

A standard linear congruential PRNG object

operator()()

uint64_t theoretica::PRNG::operator() ( )

inline

Generate a pseudorandom number.

See also

next()

splitmix64()

static PRNG theoretica::PRNG::splitmix64 ( uint64_t  seed = 1 )

inlinestatic

Returns a Splitmix64 generator.

Parameters

seed	The seed to use for the generator

Returns

A splitmix64 pseudorandom number generator

xoshiro() [1/2]

static PRNG theoretica::PRNG::xoshiro ( const std::vector< uint64_t > &  p )

inlinestatic

Returns a Xoshiro256++ generator.

Parameters

p	The four state parameters

Returns

A Xoshiro256++ pseudorandom number generator

xoshiro() [2/2]

static PRNG theoretica::PRNG::xoshiro ( uint64_t  seed = 1 )

inlinestatic

Returns a Xoshiro256++ generator.

Parameters

seed	The seed to use for the generator

Returns

A Xoshiro256++ pseudorandom number generator

The four parameters for the Xoshiro256++ algorithm are generated using the Splitmix64 algorithm.

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The documentation for this class was generated from the following file:

• pseudorandom/prng.h