/usr/include/root/Math/QuasiRandom.h is in libroot-math-mathmore-dev 5.34.30-0ubuntu8.
This file is owned by root:root, with mode 0o644.
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// Author: L. Moneta, A. Zsenei 08/2005
/**********************************************************************
* *
* Copyright (c) 2004 ROOT Foundation, CERN/PH-SFT *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this library (see file COPYING); if not, write *
* to the Free Software Foundation, Inc., 59 Temple Place, Suite *
* 330, Boston, MA 02111-1307 USA, or contact the author. *
* *
**********************************************************************/
// Header file for class GSLRandom
//
// Created by: moneta at Sun Nov 21 16:26:03 2004
//
// Last update: Sun Nov 21 16:26:03 2004
//
#ifndef ROOT_Math_QuasiRandom
#define ROOT_Math_QuasiRandom
#include <string>
/**
@defgroup QuasiRandom QuasiRandom number generators and distributions
*/
namespace ROOT {
namespace Math {
//_____________________________________________________________________________________
/**
User class for MathMore random numbers template on the Engine type.
The API of this class followed that of the class ROOT::Math::Random
It must be implemented using as Engine one of the derived classes of
ROOT::Math::GSLQuasiRandomEngine, like ROOT::Math::GSLQrngSobol
@ingroup Random
*/
template < class Engine>
class QuasiRandom {
public:
/**
Create a QuasiRandom generator. Use default engine constructor.
Engine will be initialized via Initialize() function in order to
allocate resources
*/
QuasiRandom(unsigned int dimension = 1) {
fEngine.Initialize(dimension);
}
/**
Create a QuasiRandom generator based on a provided generic engine.
Engine will be initialized via Initialize() function in order to
allocate resources
*/
explicit QuasiRandom(const Engine & e, unsigned int dimension = 1) : fEngine(e) {
fEngine.Initialize(dimension);
}
/**
Destructor: call Terminate() function of engine to free any
allocated resource
*/
~QuasiRandom() {
fEngine.Terminate();
}
/**
Generate next quasi random numbers points
*/
bool Next(double * x) {
return fEngine(x);
}
/**
Generate next quasi random numbers point (1 - dimension)
*/
double Next() {
return fEngine();
}
/**
Generate quasi random numbers between ]0,1[
0 and 1 are excluded
Function to be compatible with ROOT TRandom compatibility
*/
double Rndm() {
return fEngine();
}
/**
skip the next n number and jumb directly to the current state + n
*/
bool Skip(unsigned int n) {
return fEngine.Skip(n);
}
/**
Generate an array of random numbers between ]0,1[
Function to preserve ROOT Trandom compatibility
The array will be filled as x1,y1,z1,....x2,y2,z2,...
*/
bool RndmArray(int n, double * array) {
return fEngine.GenerateArray(array, array+n*NDim());
}
/**
Return the type (name) of the used generator
*/
std::string Type() const {
return fEngine.Name();
}
/**
Return the size of the generator state
*/
unsigned int EngineSize() const {
return fEngine.Size();
}
/**
Return the dimension of the generator
*/
unsigned int NDim() const {
return fEngine.NDim();
}
/**
Return the name of the generator
*/
std::string Name() const {
return fEngine.Name();
}
private:
Engine fEngine;
};
} // namespace Math
} // namespace ROOT
#ifndef ROOT_Math_GSLQuasiRandom
#include "Math/GSLQuasiRandom.h"
#endif
namespace ROOT {
namespace Math {
typedef QuasiRandom<ROOT::Math::GSLQRngSobol> QuasiRandomSobol;
typedef QuasiRandom<ROOT::Math::GSLQRngNiederreiter2> QuasiRandomNiederreiter;
} // namespace Math
} // namespace ROOT
#endif /* ROOT_Math_QuasiRandom */
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