/usr/include/CLHEP/Random/DRand48Engine.h is in libclhep-dev 2.1.4.1+dfsg-1.
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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 | // $Id: DRand48Engine.h,v 1.5 2010/06/16 17:24:53 garren Exp $
// -*- C++ -*-
//
// -----------------------------------------------------------------------
// HEP Random
// --- DRand48Engine ---
// class header file
// -----------------------------------------------------------------------
// This file is part of Geant4 (simulation toolkit for HEP).
//
// Random engine using drand48() and srand48() functions from C standard
// library to implement the flat() basic distribution and for setting
// seeds.
// For Windows/NT platforms (WIN32), the code for drand48 has been
// extracted from the GNU C Library 2.0.1 and adapted for the native
// types.
// Copy constructor and operator= are private for objects of this class.
// =======================================================================
// G.Cosmo - Created: 5th September 1995
// - Minor corrections: 31st October 1996
// - Added methods for engine status: 19th November 1996
// - Added srand48(), seed48(), drand48() implementations
// for Windows/NT: 6th March 1997
// - setSeed(), setSeeds() now have default dummy argument
// set to zero: 11th July 1997
// E.Tcherniaev - Porting on KCC compiler: 2nd Feb 1998
// G.Cosmo - 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: 16th Feb 1998
// E.Tcherniaev - Removed #ifdef for prototypes for drand48(), srand48()
// and seed48();
// - More accurate code for drand48() on NT base on
// a code extracted from GNU C Library 2.1.3: 8th Nov 2000
// E.Tcherniaev - prototypes for drand48(), srand48() and seed48() have
// been moved to DRand48Engine.cc: 21 Feb 2002
// Mark Fischler - methods for distrib. instance save/restore 12/8/04
// Mark Fischler - methods for anonymous save/restore 12/27/04
// Mark Fischler - methods for vector save/restore 3/7/05
// =======================================================================
#ifndef DRand48Engine_h
#define DRand48Engine_h 1
#include "CLHEP/Random/defs.h"
#include "CLHEP/Random/RandomEngine.h"
#include "CLHEP/Utility/noncopyable.h"
namespace CLHEP {
/**
* @author <Gabriele.Cosmo@cern.ch>
* @ingroup random
*/
class DRand48Engine : public HepRandomEngine, public noncopyable {
public:
DRand48Engine(std::istream& is);
DRand48Engine();
DRand48Engine(long seed);
DRand48Engine(int rowIndex, int colIndex);
virtual ~DRand48Engine();
// Constructors and destructor
double flat();
// It returns a pseudo random number between 0 and 1,
// according to the standard stdlib random function drand48()
// but excluding the end points.
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[] = "DRand48.conf" ) const;
// Saves on file DRand48.conf the current engine status.
void restoreStatus( const char filename[] = "DRand48.conf" );
// Reads from file DRand48.conf the last saved engine status
// and restores it.
void showStatus() const;
// Dumps the engine status on the screen.
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 "DRand48Engine";}
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 = 4;
private:
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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