lass::num::RandomParkMiller Class Reference
[Random]

Minimal Standard generator by Park and Miller

RandomParkMiller is the LASS implementation of the Minimal Standard generator by Park and Miller. More...

#include <random.h>

Public Types
typedef num::Tuint32	TValue
	type of return value.
Public Member Functions
	RandomParkMiller ()
	default constructor.
	RandomParkMiller (TValue seed)
	default constructor.
void	seed (TValue seed)
const TValue	operator() ()
	draw a random number
const TValue	operator() (TValue supremum)
	draw a random number remapped to range [0, supremum)
template<typename OutputIterator >
OutputIterator	getState (OutputIterator first) const
template<typename InputIterator >
void	setState (InputIterator first, InputIterator last)
Static Public Attributes
static const TValue	max = RandomParkMiller::modulus_
	maximum return value.
Private Types
enum	{   multiplier_ = 16807, modulus_ = 2147483647, seedMask_ = 123456789, schrageQuotient_ = modulus_ / multiplier_,   schrageRest_ = modulus_ % multiplier_ }
Private Attributes
TValue	buffer_

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Detailed Description

Minimal Standard generator by Park and Miller

RandomParkMiller is the LASS implementation of the Minimal Standard generator by Park and Miller.

Park and Miller, "Random Number Generators: Good ones are hard to find", Communications of the ACM, October 1988, Volume 31, No 10, pages 1192-1201.

Definition at line 96 of file random.h.

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Member Typedef Documentation

typedef num::Tuint32 lass::num::RandomParkMiller::TValue

type of return value.

Definition at line 100 of file random.h.

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Member Enumeration Documentation

anonymous enum [private]

Enumerator:

multiplier_
modulus_
seedMask_
schrageQuotient_
schrageRest_

Definition at line 116 of file random.h.

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Constructor & Destructor Documentation

lass::num::RandomParkMiller::RandomParkMiller

(

)

default constructor.

will seed with default value

Definition at line 69 of file random.cpp.

References seed().

lass::num::RandomParkMiller::RandomParkMiller

(

TValue

seed

)

[explicit]

default constructor.

will seed with default value

Definition at line 79 of file random.cpp.

References seed().

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Member Function Documentation

void lass::num::RandomParkMiller::seed

(

TValue

seed

)

Definition at line 86 of file random.cpp.

References buffer_, and seedMask_.

Referenced by RandomParkMiller().

const RandomParkMiller::TValue lass::num::RandomParkMiller::operator()

(

)

draw a random number

Definition at line 95 of file random.cpp.

References buffer_, multiplier_, schrageQuotient_, and schrageRest_.

const RandomParkMiller::TValue lass::num::RandomParkMiller::operator()

(

TValue

supremum

)

[inline]

draw a random number remapped to range [0, supremum)

Deprecated:

this is A VERY BAD WAY TO DO IT!

Definition at line 98 of file random.inl.

template<typename OutputIterator >

OutputIterator lass::num::RandomParkMiller::getState

(

OutputIterator

first

)

const [inline]

Definition at line 106 of file random.inl.

References buffer_.

template<typename InputIterator >

void lass::num::RandomParkMiller::setState	(	InputIterator	first,
		InputIterator	last
	)			[inline]

Definition at line 115 of file random.inl.

References buffer_, and LASS_ASSERT.

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Field Documentation

const RandomParkMiller::TValue lass::num::RandomParkMiller::max = RandomParkMiller::modulus_ [static]

maximum return value.

Definition at line 101 of file random.h.

TValue lass::num::RandomParkMiller::buffer_ [private]

Definition at line 125 of file random.h.

Referenced by getState(), operator()(), seed(), and setState().

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

• random.h
• random.cpp
• random.inl