Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/externals/clhep/src/EngineFactory.cc

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  1 // -*- C++ -*-
  2 //
  3 // -----------------------------------------------------------------------
  4 //                             HEP Random
  5 //                      --- EngineFactory ---
  6 //                      class implementation file
  7 // -----------------------------------------------------------------------
  8 //
  9 // =======================================================================
 10 // Mark Fischler  - Created: Dec. 21, 2004
 11 // =======================================================================
 12 
 13 #include "CLHEP/Random/EngineFactory.h"
 14 #include "CLHEP/Random/DualRand.h"
 15 #include "CLHEP/Random/JamesRandom.h"
 16 #include "CLHEP/Random/MixMaxRng.h"
 17 #include "CLHEP/Random/MTwistEngine.h"
 18 #include "CLHEP/Random/RanecuEngine.h"
 19 #include "CLHEP/Random/Ranlux64Engine.h"
 20 #include "CLHEP/Random/RanluxppEngine.h"
 21 #include "CLHEP/Random/RanluxEngine.h"
 22 #include "CLHEP/Random/RanshiEngine.h"
 23 #include "CLHEP/Random/NonRandomEngine.h"
 24 #include "CLHEP/Random/engineIDulong.h"
 25 #include <iostream>
 26 #include <string>
 27 #include <vector>
 28 
 29 namespace CLHEP {
 30 
 31 template<class E>
 32 static HepRandomEngine* 
 33 makeAnEngine (const std::string & tag, 
 34               std::istream & is) {
 35   if ( tag != E::beginTag() ) return 0;
 36   HepRandomEngine* eptr = new E;
 37   eptr->getState(is);
 38   if (!is) return 0;
 39   return eptr;        
 40 }       
 41 
 42 template<class E>
 43 static HepRandomEngine* 
 44 makeAnEngine (const std::vector<unsigned long> & v) {
 45   if ( (v[0] & 0xffffffffUL) != engineIDulong<E>() ) return 0;
 46   HepRandomEngine* eptr = new E;
 47   bool success = eptr->getState(v);
 48   if (!success) return 0;
 49   // std::cerr << "makeAnEngine made " << E::engineName() << "\n"; 
 50   return eptr;        
 51 }       
 52 
 53 HepRandomEngine* EngineFactory::newEngine(std::istream& is) {
 54   HepRandomEngine* eptr; 
 55   std::string tag;
 56   is >> tag;
 57   eptr = makeAnEngine <HepJamesRandom>  (tag, is); if (eptr) return eptr;
 58   eptr = makeAnEngine <RanecuEngine>    (tag, is); if (eptr) return eptr;
 59   eptr = makeAnEngine <Ranlux64Engine>  (tag, is); if (eptr) return eptr;
 60   eptr = makeAnEngine <RanluxppEngine>  (tag, is); if (eptr) return eptr;
 61   eptr = makeAnEngine <MixMaxRng>       (tag, is); if (eptr) return eptr;
 62   eptr = makeAnEngine <MTwistEngine>    (tag, is); if (eptr) return eptr;
 63   eptr = makeAnEngine <DualRand>        (tag, is); if (eptr) return eptr;
 64   eptr = makeAnEngine <RanluxEngine>    (tag, is); if (eptr) return eptr;
 65   eptr = makeAnEngine <RanshiEngine>    (tag, is); if (eptr) return eptr;
 66   eptr = makeAnEngine <NonRandomEngine> (tag, is); if (eptr) return eptr;
 67   is.clear(std::ios::badbit | is.rdstate());
 68   std::cerr << 
 69     "Input mispositioned or bad in reading anonymous engine\n"
 70       << "\nBegin-tag read was: " << tag 
 71       << "\nInput stream is probably fouled up\n";
 72   return eptr;
 73 }
 74 
 75 HepRandomEngine* 
 76 EngineFactory::newEngine(std::vector<unsigned long> const & v) {
 77   HepRandomEngine* eptr; 
 78   eptr = makeAnEngine <HepJamesRandom>  (v); if (eptr) return eptr;
 79   eptr = makeAnEngine <RanecuEngine>    (v); if (eptr) return eptr;
 80   eptr = makeAnEngine <Ranlux64Engine>  (v); if (eptr) return eptr;
 81   eptr = makeAnEngine <RanluxppEngine>  (v); if (eptr) return eptr;
 82   eptr = makeAnEngine <MixMaxRng>       (v); if (eptr) return eptr;
 83   eptr = makeAnEngine <MTwistEngine>    (v); if (eptr) return eptr;
 84   eptr = makeAnEngine <DualRand>        (v); if (eptr) return eptr;
 85   eptr = makeAnEngine <RanluxEngine>    (v); if (eptr) return eptr;
 86   eptr = makeAnEngine <RanshiEngine>    (v); if (eptr) return eptr;
 87   eptr = makeAnEngine <NonRandomEngine> (v); if (eptr) return eptr;
 88   std::cerr << 
 89     "Cannot correctly get anonymous engine from vector\n"
 90       << "First unsigned long was: " << v[0] 
 91       << " Vector size was: " << v.size() <<"\n";
 92   return eptr;
 93 }
 94 
 95 }  // namespace CLHEP
 96 
 97