24 lines
555 B
C
24 lines
555 B
C
#ifndef RANDOM_H
|
|
#define RANDOM_H
|
|
|
|
#include "chacha.h"
|
|
#include "util.h"
|
|
|
|
#define RANDOM_CACHE_SIZE 256ULL
|
|
#define RANDOM_RESEED_SIZE 256ULL * 1024
|
|
|
|
struct random_state {
|
|
size_t index;
|
|
size_t reseed;
|
|
chacha_ctx ctx;
|
|
u8 cache[RANDOM_CACHE_SIZE];
|
|
};
|
|
|
|
void random_state_init(struct random_state *state);
|
|
u16 get_random_u16(struct random_state *state);
|
|
u16 get_random_u16_uniform(struct random_state *state, u16 bound);
|
|
u64 get_random_u64(struct random_state *state);
|
|
u64 get_random_u64_uniform(struct random_state *state, u64 bound);
|
|
|
|
#endif
|