statically available random and semirandom devices

alib2std/src/extensions/random.cpp

+/*
+ * istream.cpp
+ *
+ * Created on: Apr 1, 2013
+ * Author: Jan Travnicek
+ */
+
+#include "../random"
+
+namespace std {
+
+	random_device random_devices::random;
+	random_devices::semirandom_device random_devices::semirandom;
+
+}

alib2std/src/extensions/random.hpp

+/*
+ * random.hpp
+ *
+ * Created on: May 28, 2015
+ * Author: Jan Travnicek
+ */
+
+#ifndef RANDOM_HPP_
+#define RANDOM_HPP_
+
+namespace std {
+
+class random_devices {
+public:
+	static random_device random;
+
+private:
+	class semirandom_device {
+	public:
+		typedef unsigned int result_type;
+
+	private:
+		std::mt19937 gen;
+		std::uniform_int_distribution<unsigned int> dis;
+
+	public:
+		semirandom_device() : gen(random_devices::random()) {
+		}
+
+		result_type operator()() {
+			return dis(gen);
+		}
+
+		result_type min() {
+			return 0;
+		}
+
+		result_type max() {
+			return numeric_limits<result_type>::max() ;
+		}
+	};
+public:
+	static semirandom_device semirandom;
+
+};
+
+} /* namespace std */
+
+#endif /* ALGORITHM_HPP_ */

alib2std/src/random

+#ifndef __RANDOM_HEADER_WRAPPER_
+#define __RANDOM_HEADER_WRAPPER_
+
+#include <bits/../random>
+#include "limits"
+#include "extensions/random.hpp"
+
+#endif /* __RANDOM_HEADER_WRAPPER_ */

alib2std/test-src/extensions/RandomTest.cpp

+#include "RandomTest.h"
+#include <random>
+
+CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( RandomTest, "bits" );
+CPPUNIT_TEST_SUITE_REGISTRATION( RandomTest );
+
+void RandomTest::setUp() {
+}
+
+void RandomTest::tearDown() {
+}
+
+void RandomTest::testRandom() {
+	std::cout << std::random_devices::random() << std::endl;
+	std::cout << std::random_devices::semirandom() << std::endl;
+}
+

alib2std/test-src/extensions/RandomTest.h

+#ifndef RANDOM_TEST_H_
+#define RANDOM_TEST_H_
+
+#include <cppunit/extensions/HelperMacros.h>
+
+class RandomTest : public CppUnit::TestFixture
+{
+  CPPUNIT_TEST_SUITE( RandomTest );
+  CPPUNIT_TEST( testRandom );
+  CPPUNIT_TEST_SUITE_END();
+
+public:
+  void setUp();
+  void tearDown();
+
+  void testRandom();
+};
+
+#endif  // RANDOM_TEST_H_