[ViewVC] Diff of: cvs/deliantra/server/include/util.h

Comparing deliantra/server/include/util.h (file contents):
Revision 1.33 by root, Thu Jan 18 22:20:00 2007 UTC vs.
Revision 1.34 by root, Fri Jan 19 15:15:50 2007 UTC

 // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213.
 // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps
 // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps
 struct tausworthe_random_generator
 {
+  // generator
   uint32_t state [4];
-  tausworthe_random_generator (uint32_t seed);
+  void operator =(const tausworthe_random_generator &src)
+  {
+    state [0] = src.state [0];
+    state [1] = src.state [1];
+    state [2] = src.state [2];
+    state [3] = src.state [3];
+  }
+  void seed (uint32_t seed);
   uint32_t next ();
+  // uniform distribution
   uint32_t operator ()(uint32_t r_max)
   {
-    return next () % r_max;
+    return is_constant (r_max)
+             ? this->next () % r_max
+             : get_range (r_max);
   }
   // return a number within (min .. max)
   int operator () (int r_min, int r_max)
   {
+    return is_constant (r_min) && is_constant (r_max)
-    return r_min + (*this) (max (r_max - r_min + 1, 1));
+              ? r_min + (*this) (max (r_max - r_min + 1, 1))
+              : get_range (r_min, r_max);
   }
   double operator ()()
   {
-    return next () / (double)0xFFFFFFFFU;
+    return this->next () / (double)0xFFFFFFFFU;
   }
+protected:
+  uint32_t get_range (uint32_t r_max);
+  int get_range (int r_min, int r_max);
 };
 typedef tausworthe_random_generator rand_gen;
 extern rand_gen rndm;

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