JRandom.cc

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#include <string>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <limits>
 
#include "TFile.h"
#include "TRandom3.h"
 
#include "JROOT/JRootFileReader.hh"
#include "JROOT/JRootFileWriter.hh"
#include "JROOT/JRandom.hh"
 
#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"
 
 
/**
 * \file
 *
 * Program to test TRandom reproducibility.
 * \author mdejong
 */
int main(int argc, char **argv)
{
  using namespace std;
  using namespace JPP;
 
  TString   file_name;
  JRandom   seed;
  int       debug;
 
  try {
 
    JParser<> zap("Program to test TRandom reproducibility.");
 
    zap['f'] = make_field(file_name);
    zap['S'] = make_field(seed)              = 0;
    zap['d'] = make_field(debug)             = 3;
 
    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }
 
  if (!seed.set(gRandom)) {
    FATAL("Invalid configuration for random number generator " << seed << endl);
  }
 
  DEBUG("seed: <" << seed << "> -> " << gRandom->TRandom::GetSeed() << endl);
 
  const UInt_t MAX = numeric_limits<UInt_t>::max();
 
  UInt_t value[2] = { 0, 0 };
 
  if (!JRandom::write(file_name, gRandom)) {
    FATAL("Failure writing to file <" << file_name << ">." << endl);
  }
 
  value[0] = gRandom->Integer(MAX);
    
  DEBUG("random[0]: " << value[0] << endl);
 
  seed = file_name;
 
  if (!seed.set(gRandom)) {
    FATAL("Invalid configuration for random number generator " << seed << endl);
  }
 
  value[1] = gRandom->Integer(MAX);
 
  DEBUG("random[1]: " << value[1] << endl);
 
  ASSERT(value[0] == value[1]);
  
  return 0;
}