/usr/include/CLHEP/Random/RandEngine.h is in libclhep-dev 2.1.4.1-1.2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 | // $Id: RandEngine.h,v 1.6 2010/06/16 17:24:53 garren Exp $
// -*- C++ -*-
//
// -----------------------------------------------------------------------
// HEP Random
// --- RandEngine ---
// class header file
// -----------------------------------------------------------------------
// This file is part of Geant4 (simulation toolkit for HEP).
//
// Simple random engine using rand() and srand() functions from C standard
// library to implement the flat() basic distribution and for setting
// seeds.
// Copy constructor and operator= are private for objects of this class.
// =======================================================================
// Gabriele Cosmo - Created: 5th September 1995
// - Minor corrections: 31st October 1996
// - Added methods for engine status: 19th November 1996
// - setSeed(), setSeeds() now have default dummy argument
// set to zero: 11th July 1997
// - Private copy constructor and operator=: 26th Feb 1998
// J.Marraffino - Added stream operators and related constructor.
// Added automatic seed selection from seed table and
// engine counter: 15th Feb 1998
// Ken Smith - Added conversion operators: 6th Aug 1998
// replace mx by mantissa_bit_32
// M Fischler - Inserted warnings about the fact that the quality of rand()
// is quite poor.
// Mark Fischler Methods for distrib. instance save/restore 12/8/04
// Mark Fischler methods for anonymous save/restore 12/27/04
// =======================================================================
#ifndef RandEngine_h
#define RandEngine_h 1
#include "CLHEP/Random/defs.h"
#include "CLHEP/Random/RandomEngine.h"
namespace CLHEP {
/**
* @author <Gabriele.Cosmo@cern.ch>
* @ingroup random
*/
class RandEngine : public HepRandomEngine {
public:
RandEngine(std::istream& is);
RandEngine();
RandEngine(long seed);
RandEngine(int rowIndex, int colIndex);
virtual ~RandEngine();
// Constructors and destructor
double flat();
// It returns a pseudo random number between 0 and 1,
// according to the standard stdlib random function rand()
// but excluding the end points.
//
// WARNING: rand() is quite a weak generator on most systems, <
// will not pass several randomness tests, and does not give a <
// reproducible sequence of numbers. <
void flatArray (const int size, double* vect);
// Fills the array "vect" of specified size with flat random values.
void setSeed(long seed, int dum=0);
// Sets the state of the algorithm according to seed.
void setSeeds(const long * seeds, int dum=0);
// Sets the state of the algorithm according to the zero terminated
// array of seeds. Only the first seed is used.
void saveStatus( const char filename[] = "Rand.conf" ) const;
// Saves on file Rand.conf the current engine status.
// WARNING: This is non-functional, as rand() on various systems will <
// not give reproducible streams. <
void restoreStatus( const char filename[] = "Rand.conf" );
// Reads from file Rand.conf the last saved engine status
// and restores it.
// WARNING: This is non-functional, as rand() on various systems will <
// not give reproducible streams. <
void showStatus() const;
// Dumps the engine status on the screen.
operator unsigned int(); // 32-bit flat value, quickest of all.
virtual std::ostream & put (std::ostream & os) const;
virtual std::istream & get (std::istream & is);
static std::string beginTag ( );
virtual std::istream & getState ( std::istream & is );
std::string name() const;
static std::string engineName() {return "RandEngine";}
std::vector<unsigned long> put () const;
bool get (const std::vector<unsigned long> & v);
bool getState (const std::vector<unsigned long> & v);
static const unsigned int VECTOR_STATE_SIZE = 3;
private:
RandEngine(const RandEngine &p);
RandEngine & operator = (const RandEngine &p);
// Private copy constructor and assignment operator.
private:
long seq;
static int numEngines;
static int maxIndex;
};
} // namespace CLHEP
#ifdef ENABLE_BACKWARDS_COMPATIBILITY
// backwards compatibility will be enabled ONLY in CLHEP 1.9
using namespace CLHEP;
#endif
#endif
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