BabayagaNLORandom.cxx

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//--------------------------------------------------------------------------
//
// Environment:
//      This software is part of the EvtGen package developed jointly
//      for the BaBar and CLEO collaborations.  If you use all or part
//      of it, please give an appropriate acknowledgement.
//
// Copyright Information: See EvtGen/COPYRIGHT
//      Copyright (C) 1998      Caltech, UCSB
//
// Module: EvtRandom.cc
//
// Description: routines to get random numbers from 
//              random number generator.
//
// Modification history:
//
//    DJL/RYD   September 25, 1996           Module created
//    Wang Boqun September 06, 2010          Add fortran interface
//
//------------------------------------------------------------------------
//
 
#include "BabayagaNLO/BabayagaNLORandom.h"
 
#include "CLHEP/Random/RanluxEngine.h"
#include <iostream>
using namespace std;
using namespace CLHEP;
 
HepRandomEngine* BabayagaNLORandom::_randomEngine=0;
 
void BabayagaNLORandom::setRandomEngine(CLHEP::HepRandomEngine* randomEngine){
  _randomEngine=randomEngine;
}
 
 
double BabayagaNLORandom::random(){
 
  if (_randomEngine==0){
    cerr <<"No random engine available in "
               <<"BabayagaNLORandom::random()."<<endl;
  }
 
    return _randomEngine->flat();
  }
 
 
 
double BabayagaNLORandom::Flat( double min, double max){
 
  if ( min > max ) {
    cerr<< "min>max in BabayagaNLORandom::Flat(" << min << "," << max << ")" <<endl;
    double tmp = min;
    min = max;
    max = tmp;
  }
 
  return BabayagaNLORandom::random()*( max - min )+min;
 
} 
 
double BabayagaNLORandom::Flat(double max){
 
  return max*BabayagaNLORandom::random();
 
} 
 
double BabayagaNLORandom::Flat(){
 
  return BabayagaNLORandom::random();
 
 } 
 
void BabayagaNLORandom::FlatArray(double* vect, const int size){
  if(_randomEngine == 0) 
      cout<<"Can not get randomEngine pointer in BabayagaNLORandom::FlatArray"<<endl;
  else {
      _randomEngine->flatArray(size,vect);
  }
}
 
void BabayagaNLORandom::FlatArrayF(float* vect, const int size){
 
  if(_randomEngine == 0) {
      cout<<"Can not get randomEngine pointer in BabayagaNLORandom::FlatArray"<<endl;
      return;
  }
  else {
      for (int ir=0; ir<size; ir++)
       vect[ir] = _randomEngine->flat();
  }
 
}
 
extern "C" {
 
    void babayaga_ranlux_ (float* vect, const int &size){
        BabayagaNLORandom::FlatArrayF(vect, size);
    }
 
    void babayaga_ranluxd_ (double* vect, const int &size){
        BabayagaNLORandom::FlatArray(vect, size);
    }
 
}