blob: 4e0b8c938e824571667edf1b01b1cb6173c20ff7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
#pragma once
#include <stdint.h>
#define XORSHIFT_S 16
typedef struct {
uint64_t s[XORSHIFT_S];
int p;
} randctx;
void rand_seed (randctx * const st);
uint64_t rand_u64 (randctx * const st);
double rand_d01 (randctx * const st);
double rand_d11 (randctx * const st);
int rand_bool (randctx * const st);
#define rand_distrib(st,v) ((v)[rand_u64(st)%vlen(v)])
#define rand_mod(st,max) (rand_u64(st)%(max))
|
