hdrl_random.c File Reference

#include <hdrl_random.h>
#include <stdint.h>
#include <math.h>

Include dependency graph for hdrl_random.c:

Data Structures
struct	hdrl_random_state_

Functions
hdrl_random_state *	hdrl_random_state_new (int type, uint64_t *seed)
	create random number generator state
void	hdrl_random_state_delete (hdrl_random_state *state)
	delete random number generator state structure
int64_t	hdrl_random_uniform_int64 (hdrl_random_state *state, int64_t minval, int64_t maxval)
	generatore uniformly distributed 64 bit integers within range
double	hdrl_random_uniform_double (hdrl_random_state *state, double minval, double maxval)
	generatore uniformly distributed double within range
uint64_t	hdrl_random_poisson (hdrl_random_state *state, double lam)
	generatore poisson distributed values
double	hdrl_random_normal (hdrl_random_state *state, double mean, double sigma)
	generatore normal distributed values

Function Documentation

hdrl_random_normal()

double hdrl_random_normal	(	hdrl_random_state *	state,
		double	mean,
		double	sigma
	)

generatore normal distributed values

Parameters

state	rng state
mean	mean/location parameter of normal distribution
sigma	sigma/scale parameter of normal distribution

Returns

normal distributed value

hdrl_random_poisson()

uint64_t hdrl_random_poisson	(	hdrl_random_state *	state,
		double	lam
	)

generatore poisson distributed values

Parameters

state	rng state
lam	lambda/mean parameter of poisson distribution

Returns

poisson distributed value

hdrl_random_state_delete()

void hdrl_random_state_delete

(

hdrl_random_state *

state

)

delete random number generator state structure

Parameters

state

hdrl_random_state_new()

hdrl_random_state * hdrl_random_state_new	(	int	type,
		uint64_t *	seed
	)

create random number generator state

Parameters

type	type, currently needs to be 1 for pcg generator
seed	seed array, length depends on used generator, if NULL uses rand() to seed for pcg: two integers state and streamid

Returns

random number generator state structure, must be deleted with hdrl_random_state_delete

hdrl_random_uniform_double()

double hdrl_random_uniform_double	(	hdrl_random_state *	state,
		double	minval,
		double	maxval
	)

generatore uniformly distributed double within range

Parameters

state	rng state
minval	minimum value, inclusive
maxval	maximum value, inclusive

Returns

uniformly distributed double within range

hdrl_random_uniform_int64()

int64_t hdrl_random_uniform_int64	(	hdrl_random_state *	state,
		int64_t	minval,
		int64_t	maxval
	)

generatore uniformly distributed 64 bit integers within range

Parameters

state	rng state
minval	minimum value, inclusive
maxval	maximum value, inclusive

Returns

uniformly distributed 64 bit integer within range