version 0.0.1

include/RandomNumberGenerator.hpp

@@ -0,0 +1,73 @@
+#pragma once
+
+#include <cstdlib>
+#include <stdint.h>
+
+/**
+ * @brief Generate random unassigned 16, 32 and 64 bit integer using
+ * XorShift algorithm and rand() for generating a seed.
+ */
+class RandomNumberGenerator {
+  public:
+    uint16_t _seed_x16;
+    uint32_t _seed_x32;
+    uint64_t _seed_x64;
+
+    /**
+     * @brief Construct a new Random Number Generator object
+     */
+    inline RandomNumberGenerator()
+        : _seed_x16(rand()), _seed_x32(rand()), _seed_x64(rand()) {}
+
+    /**
+     * @brief generates a 16 bit unsigned integer between lower limit and
+     * upper limit (1024 and 49151 for valid port numbers)
+     *
+     * @return uint16_t
+     */
+    inline uint16_t gen_rdm_16_bit_in_interval(uint16_t _lower_limit,
+                                               uint16_t _upper_limit) {
+        _seed_x16 ^= _seed_x16 << 7;
+        _seed_x16 ^= _seed_x16 >> 9;
+        _seed_x16 ^= _seed_x16 << 8;
+        // this method returns a valid port number
+        // range should be: 1024 to 49152
+        return _seed_x16 % (_upper_limit - _lower_limit) + _lower_limit;
+    }
+
+    /**
+     * @brief generates 16 bit unsigned integer
+     *
+     * @return uint16_t
+     */
+    inline uint16_t gen_rdm_16_bit() {
+        _seed_x16 ^= _seed_x16 << 7;
+        _seed_x16 ^= _seed_x16 >> 9;
+        _seed_x16 ^= _seed_x16 << 8;
+        return _seed_x16;
+    }
+
+    /**
+     * @brief generates 32 bit unsigned integer
+     *
+     * @return uint32_t
+     */
+    inline uint32_t gen_rdm_32_bit() {
+        _seed_x32 ^= _seed_x32 << 14;
+        _seed_x32 ^= _seed_x32 >> 13;
+        _seed_x32 ^= _seed_x32 << 15;
+        return _seed_x32;
+    }
+
+    /**
+     * @brief generates 64 bit unsigned integer
+     *
+     * @return uint64_t
+     */
+    inline uint64_t gen_rdm_64_bit() {
+        _seed_x64 ^= _seed_x64 << 14;
+        _seed_x64 ^= _seed_x64 >> 23;
+        _seed_x64 ^= _seed_x64 << 33;
+        return _seed_x64;
+    }
+};