This is a fast random number generator which uses linear congruences. More...

#include <random_number_generator.h>

Inheritance diagram for arbitraryprecisioncalculation::FastLinearCongruenceRandomNumberGenerator:

Public Member Functions
	FastLinearCongruenceRandomNumberGenerator (unsigned long long multiplier, unsigned long long adder, unsigned long long modulus, unsigned long long seed)
	The constructor. More...

std::string	GetName ()
	Returns a string representation of this object. More...

void	LoadData (std::ifstream *)
	Loads data to reset the state of the random number generator to the state which was stored. More...

long long	RandomLongLong ()
	Creates a random long long value. More...

mpf_t *	RandomMpft ()
	Creates a random mpf_t value in the interval [0,1]. More...

void	StoreData (std::ofstream *)
	Stores the current state of this random number generator, such that it can completely restore the current state with this data. More...

Public Member Functions inherited from arbitraryprecisioncalculation::RandomNumberGenerator
virtual	~RandomNumberGenerator ()
	The destructor. More...

Detailed Description

This is a fast random number generator which uses linear congruences.

Constructor & Destructor Documentation

arbitraryprecisioncalculation::FastLinearCongruenceRandomNumberGenerator::FastLinearCongruenceRandomNumberGenerator	(	unsigned long long	multiplier,
		unsigned long long	adder,
		unsigned long long	modulus,
		unsigned long long	seed
	)

The constructor.

Parameters

multiplier	The factor in the linear congruence.
adder	The additive value in the linear congruence.
modulus	The modulus value in the linear congruence.
seed	The initial seed of the random number generator.

Member Function Documentation

std::string arbitraryprecisioncalculation::FastLinearCongruenceRandomNumberGenerator::GetName ( )

virtual

Returns a string representation of this object.

Returns: The name of the object.

Implements arbitraryprecisioncalculation::RandomNumberGenerator.

void arbitraryprecisioncalculation::FastLinearCongruenceRandomNumberGenerator::LoadData ( std::ifstream * input_stream )

virtual

Loads data to reset the state of the random number generator to the state which was stored.

Parameters

input_stream The stream which contains the data about the state of the random number generator.

Implements arbitraryprecisioncalculation::RandomNumberGenerator.

long long arbitraryprecisioncalculation::FastLinearCongruenceRandomNumberGenerator::RandomLongLong ( )

virtual

Creates a random long long value.

Calculates the next random by the equation (adder + multiplier · S) mod modulus, where S is the previous random value or the initial seed (if it is the first call of this function) and mod means the modulo operation.

Returns: The random value.

Implements arbitraryprecisioncalculation::RandomNumberGenerator.

mpf_t* arbitraryprecisioncalculation::FastLinearCongruenceRandomNumberGenerator::RandomMpft ( )

virtual

Creates a random mpf_t value in the interval [0,1].

The random value is generated by a call of the random long long function and a division by the modulus.

Returns: The random value.

Implements arbitraryprecisioncalculation::RandomNumberGenerator.

void arbitraryprecisioncalculation::FastLinearCongruenceRandomNumberGenerator::StoreData ( std::ofstream * output_stream )

virtual

Stores the current state of this random number generator, such that it can completely restore the current state with this data.

Parameters

output_stream The output stream where the state should be stored.

Implements arbitraryprecisioncalculation::RandomNumberGenerator.

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

src/arbitrary_precision_calculation/random_number_generator.h

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation