Main.cpp File Reference

Main. More...

#include "Includes.h"
#include "uintx_t.h"
#include "Cayley32.h"

Go to the source code of this file.

Enumerations
enum	Task {   Time, Generate, GenerateEx, GenerateMT,   None }
	Task type.

Functions
uint64_t	CPUTimeInNanoseconds ()
	CPU time in nanoseconds. More...
void	PrintHelp ()
	Print help. More...
void	GetParams (int argc, char *argv[], uintx_t &seed, Task &t)
	Get generator parameters from argv. More...
template<typename t >
void	Generate (const t &rnd, uint64_t nBufSize)
	Write an infinite number of pseudorandom bits to stdout. More...
template<typename t >
double	Time (const t &rand, uint64_t n)
	Time a PRNG. More...
void	Time (Cayley32 *pCayley, uint64_t n)
	Time Cayley and the Mersenne Twister. More...
int	main (int argc, char *argv[])
	Main. More...

Function Documentation

CPUTimeInNanoseconds()

uint64_t CPUTimeInNanoseconds

(

)

Get CPU time in nanoseconds.

Returns

User CPU time in nanoseconds.

Definition at line 48 of file CPUtime.cpp.

Generate()

template<typename t >

void Generate	(	const t &	rnd,
		uint64_t	nBufSize
	)

The bitstream is intended to be piped into Dieharder, which requires an arbitrary length bitstream. Dieharder will break the pipe when it has enough data. The output of the PNRG is accumulated in a buffer before being written to stdout.

Parameters

rnd	A PRNG.
nBufSize	Buffer size in 8-byte blocks.

Definition at line 85 of file Main.cpp.

GetParams()

void GetParams	(	int	argc,
		char *	argv[],
		uintx_t &	seed,
		Task &	t
	)

Parse the command line arguments for settings.

Parameters

argc	Number of command line arguments.
argv	Command line arguments.
seed	[OUT] Seed.
t	[OUT] Task.

Definition at line 50 of file Main.cpp.

main()

int main	(	int	argc,
		char *	argv[]
	)

Parameters

argc	Number of arguments.
argv	Arguments.

Returns

0 (What could possibly go wrong?)

Definition at line 147 of file Main.cpp.

PrintHelp()

void PrintHelp

(

)

Print canned help message to stdout.

Definition at line 28 of file Main.cpp.

Time() [1/2]

template<typename t >

double Time	(	const t &	rand,
		uint64_t	n
	)

Measure the average number of nanoseconds per bit used by a PRNG.

Parameters

rand	Pseudorandom number generation function.
n	Number of 64-bit words to generate.

Returns

Number of nanoseconds per bit.

Definition at line 110 of file Main.cpp.

Time() [2/2]

void Time	(	Cayley32 *	pCayley,
		uint64_t	n
	)

Print to the console the average number of nanoseconds per bit used by Cayley and the Mersenne Twister.

Parameters

pCayley	Pointer to an instance of the Cayley32 PRNG.
n	Number of 64-bit words to generate.

Definition at line 126 of file Main.cpp.