mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-19 01:43:36 +01:00
34 lines
849 B
C
34 lines
849 B
C
#ifndef LIGHTNING_COMMON_PSEUDORAND_H
|
|
#define LIGHTNING_COMMON_PSEUDORAND_H
|
|
#include "config.h"
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
|
|
/**
|
|
* pseudorand - pseudo (guessable!) random number between 0 and max-1.
|
|
*/
|
|
uint64_t pseudorand(uint64_t max);
|
|
|
|
/**
|
|
* pseudorand - pseudo (guessable!) random number between 0 and UINT64_MAX.
|
|
*/
|
|
uint64_t pseudorand_u64(void);
|
|
|
|
/**
|
|
* pseudorand - pseudo (guessable!) random number between 0 (inclusive) and 1
|
|
* (exclusive).
|
|
*/
|
|
double pseudorand_double(void);
|
|
|
|
/**
|
|
* Get the siphash seed for hash tables.
|
|
*/
|
|
const struct siphash_seed *siphash_seed(void);
|
|
|
|
/* Shuffle a tal array of type type. */
|
|
#define tal_arr_randomize(arr, type) \
|
|
tal_arr_randomize_((arr), sizeof(type) + 0*sizeof(arr == (type *)NULL))
|
|
void tal_arr_randomize_(void *arr, size_t elemsize);
|
|
|
|
#endif /* LIGHTNING_COMMON_PSEUDORAND_H */
|