Move random index generation into utility class

1 files changed, 29 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};
+}
+
+}