40 lines
1001 B
Plaintext
40 lines
1001 B
Plaintext
@q $Id: random.hweb 2335 2009-01-14 10:35:21Z kamenik $ @>
|
|
@q Copyright 2007, Ondra Kamenik @>
|
|
|
|
@*2 Random number generation. Start of {\tt random.h} file.
|
|
|
|
@s RandomGenerator int
|
|
@s SystemRandomGenerator int
|
|
|
|
@c
|
|
#ifndef RANDOM_H
|
|
#define RANDOM_H
|
|
|
|
@<|RandomGenerator| class declaration@>;
|
|
@<|SystemRandomGenerator| class declaration@>;
|
|
extern SystemRandomGenerator system_random_generator;
|
|
|
|
#endif
|
|
|
|
@ This is a general interface to an object able to generate random
|
|
numbers. Subclass needs to implement |uniform| method, other is, by
|
|
default, implemented here.
|
|
@<|RandomGenerator| class declaration@>=
|
|
class RandomGenerator {
|
|
public:@;
|
|
virtual double uniform() = 0;
|
|
int int_uniform();
|
|
double normal();
|
|
};
|
|
|
|
@ This implements |RandomGenerator| interface with system |drand| or
|
|
|rand|. It is not thread aware.
|
|
@<|SystemRandomGenerator| class declaration@>=
|
|
class SystemRandomGenerator : public RandomGenerator {
|
|
public:@;
|
|
double uniform();
|
|
void initSeed(int seed);
|
|
};
|
|
|
|
@ End of {\tt random.h} file.
|