Added rand::get_random_64bit_number().

dlib/rand/rand_kernel_1.h

@@ -123,6 +123,14 @@ namespace dlib
                 return mt();
             }
 
+            inline uint64 get_random_64bit_number (
+            )
+            {
+                const uint64 a = get_random_32bit_number();
+                const uint64 b = get_random_32bit_number();
+                return (a<<32)|b;
+            }
+
             double get_random_double (
             )
             {

dlib/rand/rand_kernel_abstract.h

@@ -88,6 +88,13 @@ namespace dlib
                     - returns a pseudorandom number in the range 0 to 2^32-1 
             !*/
 
+            uint64 get_random_64bit_number (
+            );
+            /*!
+                ensures
+                    - returns a pseudorandom number in the range 0 to 2^64-1 
+            !*/
+
             float get_random_float (
             );
             /*!