1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
/// @file
/// @brief random number generation
#pragma once
#include <stdint.h>
#include <util/api.h>
#ifdef __cplusplus
extern "C" {
#endif
/// generate a random permutation of the numbers `[0, bound - 1]`
///
/// The caller is responsible for `free`ing the returned array. This function
/// calls `exit` on memory allocation failure.
///
/// @param bound Exclusive upper bound on the sequence
/// @return A permutation of `[0, bound - 1]`
UTIL_API int *gv_permutation(int bound);
/// generate a random number in the range `[0, bound - 1]`
///
/// This function assumes the caller has previously seeded the `rand` random
/// number generator.
///
/// @param bound Exclusive upper bound on random number generation
/// @return A random number drawn from a uniform distribution
UTIL_API int gv_random(int bound);
/// generate a random 64-bit unsigned number in the range `[0, bound - 1]`
///
/// This function assumes the caller has previously seeded the `rand` random
/// number generator.
///
/// @param bound Exclusive upper bound on random number generation
/// @return A random number drawn from a uniform distribution
UTIL_API uint64_t gv_random_u64(uint64_t bound);
#ifdef __cplusplus
}
#endif
|
