Introducing new Rndm and QA classes

[u/mrichter/AliRoot.git] / STEER / AliRndm.h

diff --git a/STEER/AliRndm.h b/STEER/AliRndm.h
new file mode 100644 (file)
index 0000000..d3cb295
--- /dev/null
+++ b/STEER/AliRndm.h
@@ -0,0 +1,49 @@
+#ifndef ALIRNDM_H
+#define ALIRNDM_H
+/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * See cxx source for full Copyright notice                               */
+
+/* $Id$ */
+
+///////////////////////////////////////////////////////////////////////////////
+//                                                                           //
+//   Random Number Interface                                                 //
+//                                                                           //
+///////////////////////////////////////////////////////////////////////////////
+
+#include <TRandom.h>
+
+static TRandom *sRandom;
+
+class AliRndm 
+{
+public:
+  AliRndm() {SetRandom();}
+  virtual ~AliRndm() {fRandom=sRandom=0;}
+  
+  // Random number generator bit
+  virtual void SetRandom(TRandom *ran=0);
+  virtual TRandom* GetRandom() const {return fRandom;}
+  virtual void Rndm(Float_t* array, const Int_t size) const; 
+#ifdef CKNONE
+  virtual Float_t Rndm() const {return fRandom->Rndm();}
+#else
+  virtual Float_t Rndm() const {
+    Float_t r;
+    do r=fRandom->Rndm(); while(0>=r || r>=1); return r;}
+#endif
+  virtual void WriteRandom(const char *filename) const;
+  virtual void ReadRandom(const char *filename);
+
+  protected:
+  TRandom *fRandom;       // Pointer to the random number generator
+
+  private:
+  AliRndm(const AliRndm &) {}
+  AliRndm & operator=(const AliRndm &) {return (*this);}
+
+  ClassDef(AliRndm,1)  //Random Number generator wrapper
+};
+
+#endif 
+