default random number generator

Data Structures
struct	zRandMT
	random number generator based on Mersenne twister. More...

Macros
#define	zRandInit()   zRandInitMT( NULL )
#define	zRandI(min, max)   zRandMTI( NULL, min, max )
#define	zRandF(min, max)   zRandMTF( NULL, min, max )
#define	zRandN()   zRandMTN( NULL )
#define	zRandNU()   zRandMTNU( NULL )

Functions
void	zRandInitMT (zRandMT *mt)
	initialize a random number generator based on Mersenne twister. More...
int	zRandMTI (zRandMT *mt, int min, int max)
	a pseudo-random integer between min and max. More...
double	zRandMTF (zRandMT *mt, double min, double max)
	a pseudo-random double-precision floating-point value between min and max. More...
double	zRandMTN (zRandMT *mt)
	a pseudo-random double-precision floating-point value in the range of [0,1]. More...
double	zRandMTNU (zRandMT *mt)
	a pseudo-random value in the range of [0,1). More...
zRandMT *	zRandMTDefault (void)
	return a pointer to the default random number generator. More...

Detailed Description

random number operations are not available in the kernel space

convenient reimplementations of the standard rand() function. Note that they are naive implementations of pseudo-random byte sequences.

Macro Definition Documentation

zRandInit

#define zRandInit

(

)

zRandInitMT( NULL )

zRandI

#define zRandI	(		min,
			max
	)		zRandMTI( NULL, min, max )

zRandF

#define zRandF	(		min,
			max
	)		zRandMTF( NULL, min, max )

zRandN

#define zRandN

(

)

zRandMTN( NULL )

zRandNU

#define zRandNU

(

)

zRandMTNU( NULL )

Function Documentation

zRandInitMT()

void zRandInitMT

(

zRandMT *

mt

)

initialize a random number generator based on Mersenne twister.

zRandInitMT() initializes Mersenne twister mt by seeding the current time for a new history. If the null pointer is given for mt, it makes use of the internal default instance.

zRandMTI()

int zRandMTI	(	zRandMT *	mt,
		int	min,
		int	max
	)

a pseudo-random integer between min and max.

zRandMTF()

double zRandMTF	(	zRandMT *	mt,
		double	min,
		double	max
	)

a pseudo-random double-precision floating-point value between min and max.

zRandMTN()

double zRandMTN

(

zRandMT *

mt

)

a pseudo-random double-precision floating-point value in the range of [0,1].

zRandMTNU()

double zRandMTNU

(

zRandMT *

mt

)

a pseudo-random value in the range of [0,1).

zRandMTDefault()

zRandMT* zRandMTDefault

(

void

)

return a pointer to the default random number generator.