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random.h
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1
8#pragma once
9
10#include <random>
11#include <cstdint>
12#include <cstddef>
13#include <promeki/core/namespace.h>
14
15PROMEKI_NAMESPACE_BEGIN
16
17class Buffer;
18class Error;
19
41class Random {
42 public:
55 static Error trueRandom(uint8_t *buf, size_t bytes);
56
61 static Random &global();
62
66 Random();
67
72 explicit Random(uint64_t seed);
73
78 void seed(uint64_t seed);
79
86 int randomInt(int min, int max);
87
94 int64_t randomInt64(int64_t min, int64_t max);
95
102 double randomDouble(double min, double max);
103
110 float randomFloat(float min, float max);
111
117 Buffer randomBytes(size_t count);
118
123 bool randomBool();
124
125 private:
126 std::mt19937_64 _engine;
127};
128
129PROMEKI_NAMESPACE_END
Buffer
Generic memory buffer descriptor with alignment and memory space support.
Definition buffer.h:85
Error
Lightweight error code wrapper for the promeki library.
Definition error.h:39
List
Dynamic array container wrapping std::vector.
Definition list.h:40
Random
Pseudo-random number generator wrapping std::mt19937_64.
Definition random.h:41
Random::global
static Random & global()
Returns a thread-local global Random instance.
Random::Random
Random(uint64_t seed)
Constructs a Random with a specific seed.
Random::randomDouble
double randomDouble(double min, double max)
Returns a uniformly distributed random double in [min, max).
Random::randomBytes
Buffer randomBytes(size_t count)
Returns a Buffer filled with random bytes.
Random::randomInt
int randomInt(int min, int max)
Returns a uniformly distributed random integer in [min, max].
Random::trueRandom
static Error trueRandom(uint8_t *buf, size_t bytes)
Fills a buffer with true random bytes from the OS entropy source.
Random::randomInt64
int64_t randomInt64(int64_t min, int64_t max)
Returns a uniformly distributed random 64-bit integer in [min, max].
Random::randomFloat
float randomFloat(float min, float max)
Returns a uniformly distributed random float in [min, max).
Random::seed
void seed(uint64_t seed)
Reseeds the engine.
Random::randomBool
bool randomBool()
Returns a random boolean with 50/50 probability.
Random::Random
Random()
Constructs a Random seeded from std::random_device.
PROMEKI_NAMESPACE_BEGIN
#define PROMEKI_NAMESPACE_BEGIN
Starts a promeki namespace block.
Definition namespace.h:14
PROMEKI_NAMESPACE_END
#define PROMEKI_NAMESPACE_END
Ends a promeki namespace block.
Definition namespace.h:19