/usr/include/CLHEP/Random/JamesRandom.h is in libclhep-dev 2.1.4.1-1.1.
This file is owned by root:root, with mode 0o644.
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// -*- C++ -*-
//
// -----------------------------------------------------------------------
// HEP Random
// --- HepJamesRandom ---
// class header file
// -----------------------------------------------------------------------
// This file is part of Geant4 (simulation toolkit for HEP).
//
// HepJamesRandom implements the algorithm by Marsaglia-Zaman RANMAR
// described in "F.James, Comp. Phys. Comm. 60 (1990) 329" and implemented
// in FORTRAN77 as part of the MATHLIB HEP library for pseudo-random
// numbers generation.
// This is the default random engine invoked by each distribution unless
// the user sets a different one.
// =======================================================================
// 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
// J.Marraffino - Added stream operators and related constructor.
// Added automatic seed selection from seed table and
// engine counter: 16th Feb 1998
// Ken Smith - Added conversion operators: 6th Aug 1998
// V. Innocente - changed pointers to indices 3 may 2000
// Mark Fischler - Methods for distrib. instance save/restore 12/8/04
// Mark Fischler methods for anonymous save/restore 12/27/04
// =======================================================================
#ifndef HepJamesRandom_h
#define HepJamesRandom_h 1
#include "CLHEP/Random/defs.h"
#include "CLHEP/Random/RandomEngine.h"
namespace CLHEP {
/**
* @author
* @ingroup random
*/
class HepJamesRandom: public HepRandomEngine {
public:
HepJamesRandom(std::istream& is);
HepJamesRandom();
HepJamesRandom(long seed);
HepJamesRandom(int rowIndex, int colIndex);
virtual ~HepJamesRandom();
// Constructor and destructor.
double flat();
// Returns a pseudo random number between 0 and 1
// (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[] = "JamesRand.conf" ) const;
// Saves on file JamesRand.conf the current engine status.
void restoreStatus( const char filename[] = "JamesRand.conf" );
// Reads from file JamesRand.conf the last saved engine status
// and restores it.
void showStatus() const;
// Dumps the engine status on the screen.
operator unsigned int();
// 32-bit flat, but slower than double or float.
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 "HepJamesRandom";}
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 = 202;
private:
// Members defining the current status of the generator.
double u[97];
double c, cd, cm;
int i97, j97;
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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