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-rw-r--r--src/random.cc29
-rw-r--r--src/random.h34
2 files changed, 63 insertions, 0 deletions
diff --git a/src/random.cc b/src/random.cc
new file mode 100644
index 0000000..dba3647
--- /dev/null
+++ b/src/random.cc
@@ -0,0 +1,29 @@
+#include "random.h"
+
+namespace utility {
+
+std::size_t Random::Range::get() {
+ return this->distribution_(*(this->generator_));
+}
+
+Random::Range::Range(
+ std::mt19937* const generator,
+ const std::size_t a,
+ const std::size_t b
+):
+ generator_(generator),
+ distribution_(a, b) { }
+
+Random::Random():
+ device_{},
+ generator_{device_()} { }
+
+Random::Range Random::makeRange(
+ const std::size_t a,
+ const std::size_t b) {
+ this->generator_.seed(this->device_());
+
+ return Range{&(this->generator_), a, b};
+}
+
+}
diff --git a/src/random.h b/src/random.h
new file mode 100644
index 0000000..386dc21
--- /dev/null
+++ b/src/random.h
@@ -0,0 +1,34 @@
+#pragma once
+
+#include <random>
+
+namespace utility {
+
+class Random {
+ public:
+ class Range {
+ public:
+ std::size_t get();
+
+ protected:
+ friend class Random;
+
+ Range(std::mt19937* const, const std::size_t, const std::size_t);
+
+ private:
+ std::mt19937* const generator_;
+ std::uniform_int_distribution<std::size_t> distribution_;
+ };
+
+ Random();
+
+ Range makeRange(const std::size_t, const std::size_t);
+
+ private:
+ std::random_device device_;
+ std::mt19937 generator_;
+
+};
+
+
+}