qrtplib::RTPRandomRand48 Class Reference

#include <rtprandomrand48.h>

Inheritance diagram for qrtplib::RTPRandomRand48:

Collaboration diagram for qrtplib::RTPRandomRand48:

Public Member Functions
	RTPRandomRand48 ()
	RTPRandomRand48 (uint32_t seed)
	~RTPRandomRand48 ()
uint8_t	GetRandom8 ()
uint16_t	GetRandom16 ()
uint32_t	GetRandom32 ()
double	GetRandomDouble ()
Public Member Functions inherited from qrtplib::RTPRandom
	RTPRandom ()
virtual	~RTPRandom ()
uint32_t	PickSeed ()

Private Member Functions
void	SetSeed (uint32_t seed)

Private Attributes
uint64_t	state

Additional Inherited Members
Static Public Member Functions inherited from qrtplib::RTPRandom
static RTPRandom *	CreateDefaultRandomNumberGenerator ()

Detailed Description

A random number generator using the algorithm of the rand48 set of functions.

Definition at line 51 of file rtprandomrand48.h.

Constructor & Destructor Documentation

RTPRandomRand48() [1/2]

qrtplib::RTPRandomRand48::RTPRandomRand48

(

)

Definition at line 39 of file rtprandomrand48.cpp.

References qrtplib::RTPRandom::PickSeed(), and SetSeed().

{
    SetSeed(PickSeed());
}

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RTPRandomRand48() [2/2]

qrtplib::RTPRandomRand48::RTPRandomRand48

(

uint32_t

seed

)

Definition at line 44 of file rtprandomrand48.cpp.

References SetSeed().

{
    SetSeed(seed);
}

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~RTPRandomRand48()

qrtplib::RTPRandomRand48::~RTPRandomRand48

(

)

Definition at line 49 of file rtprandomrand48.cpp.

{
}

Member Function Documentation

GetRandom16()

uint16_t qrtplib::RTPRandomRand48::GetRandom16 ( )

virtual

Returns a random sixteen bit value.

Implements qrtplib::RTPRandom.

Definition at line 65 of file rtprandomrand48.cpp.

References GetRandom32().

{
    uint32_t x = ((GetRandom32() >> 16) & 0xffff);

    return (uint16_t) x;
}

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GetRandom32()

uint32_t qrtplib::RTPRandomRand48::GetRandom32 ( )

virtual

Returns a random thirty-two bit value.

Implements qrtplib::RTPRandom.

Definition at line 72 of file rtprandomrand48.cpp.

References state.

Referenced by GetRandom16(), and GetRandom8().

{
    state = ((0x5DEECE66DULL * state) + 0xBULL) & 0x0000ffffffffffffULL;
    uint32_t x = (uint32_t) ((state >> 16) & 0xffffffffULL);
    qDebug("RTPRandomRand48::GetRandom32: %u", x);

    return x;
}

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GetRandom8()

uint8_t qrtplib::RTPRandomRand48::GetRandom8 ( )

virtual

Returns a random eight bit value.

Implements qrtplib::RTPRandom.

Definition at line 58 of file rtprandomrand48.cpp.

References GetRandom32().

{
    uint32_t x = ((GetRandom32() >> 24) & 0xff);

    return (uint8_t) x;
}

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GetRandomDouble()

double qrtplib::RTPRandomRand48::GetRandomDouble ( )

virtual

Returns a random number between $0.0$ and $1.0$.

Implements qrtplib::RTPRandom.

Definition at line 81 of file rtprandomrand48.cpp.

References state.

{

    state = ((0x5DEECE66DULL * state) + 0xBULL) & 0x0000ffffffffffffULL;
    int64_t x = (int64_t) state;

    double y = 3.552713678800500929355621337890625e-15 * (double) x;
    return y;
}

SetSeed()

void qrtplib::RTPRandomRand48::SetSeed ( uint32_t  seed )

private

Definition at line 53 of file rtprandomrand48.cpp.

References state.

Referenced by RTPRandomRand48().

{
    state = ((uint64_t) seed) << 16 | 0x330EULL;
}

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Member Data Documentation

state

uint64_t qrtplib::RTPRandomRand48::state

private

Definition at line 65 of file rtprandomrand48.h.

Referenced by GetRandom32(), GetRandomDouble(), and SetSeed().

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

• qrtplib/rtprandomrand48.h
• qrtplib/rtprandomrand48.cpp