src/utils.cpp

+#include "utils.h"
+
+#include "config.h"
+
+#include <random>
+
+namespace// anonymous namespace
+{
+    std::mt19937_64 randomGenerator;// NOLINT(*-msc51-cpp) => deterministic random!
+    bool seedSet = false;
+    std::uniform_real_distribution<> distribution(0, 1);
+}// namespace
+
+double util::getRandom()
+{
+    if (!seedSet) [[unlikely]]
+    {
+        randomGenerator.seed(RANDOM_SEED);
+        seedSet = true;
+    }
+    return distribution(randomGenerator);
+}
+
+unsigned int util::getRandomInt(unsigned int min, unsigned int max)
+{
+    if (!seedSet) [[unlikely]]
+    {
+        randomGenerator.seed(RANDOM_SEED);
+        seedSet = true;
+    }
+    return std::uniform_int_distribution<>(min, max)(randomGenerator);
+}
+
+std::mt19937_64 &util::getRawRandom()
+{
+    if (!seedSet) [[unlikely]]
+    {
+        randomGenerator.seed(RANDOM_SEED);
+        seedSet = true;
+    }
+    return randomGenerator;
+}

src/utils.h

+#pragma once
+
+#include <algorithm>
+#include <functional>
+#include <memory>
+#include <random>
+#include <stdexcept>
+#include <string>
+#include <vector>
+
+namespace util
+{
+    /**
+     * Get a random number
+     * @return a number between 0 (inclusive) and 1 (exclusive)
+     */
+    double getRandom();
+    /**
+     * @return a random integer number between min (included) and max (included)
+     */
+    unsigned int getRandomInt(unsigned int min, unsigned int max);
+    /**
+     * @return the random generator directly, it is a deterministic random
+     */
+    std::mt19937_64 &getRawRandom();
+
+}// namespace util