[u/mrichter/AliRoot.git] / STEER / AliRndm.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/*
$Log$
Revision 1.1  2000/11/30 07:12:48  alibrary
Introducing new Rndm and QA classes

*/

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include "TSystem.h"
#include "TFile.h"

#include "AliRndm.h"
#include "TRandom3.h"

ClassImp(AliRndm)


//_____________________________________________________________________________
void AliRndm::Rndm(Float_t* array, const Int_t size) const
{
  //
  // Return an array of n random numbers uniformly distributed 
  // between 0 and 1 not included
  //
  for(Int_t i=0; i<size; i++) 
#ifdef CKNONE
    array[i]=fRandom->Rndm();
#else
    do array[i]=fRandom->Rndm(); while(0>=array[i] || array[i]>=1);
#endif
}

//_____________________________________________________________________________
void AliRndm::ReadRandom(const char *filename)
{
  char *fntmp = gSystem->ExpandPathName(filename);
  TFile *file = new TFile(fntmp,"r");
  delete [] fntmp;
  if(!file) {
    printf("AliRndm:: Could not open file %s\n",filename);
  } else {
    if(!fRandom) fRandom = new TRandom();
    fRandom->Read("Random");
    file->Close();
    delete file;
  }
}

//_____________________________________________________________________________
void AliRndm::WriteRandom(const char *filename) const
{
  char *fntmp = gSystem->ExpandPathName(filename);
  TFile *file = new TFile(fntmp,"new");
  delete [] fntmp;
  if(!file) {
    printf("AliRndm:: Could not open file %s\n",filename);
  } else {
    fRandom->Write();
    file->Close();
    delete file;
  }
}
Commit	Line	Data
65fb704d	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/*
	17	$Log$
3e54283a	18	Revision 1.1 2000/11/30 07:12:48 alibrary
	19	Introducing new Rndm and QA classes
	20
65fb704d	21	*/
	22
	23	///////////////////////////////////////////////////////////////////////////////
	24	// //
	25	// //
	26	///////////////////////////////////////////////////////////////////////////////
	27
	28	#include "TSystem.h"
	29	#include "TFile.h"
	30
	31	#include "AliRndm.h"
	32	#include "TRandom3.h"
	33
	34	ClassImp(AliRndm)
	35
	36
	37	//_____________________________________________________________________________
	38	void AliRndm::Rndm(Float_t* array, const Int_t size) const
	39	{
	40	//
	41	// Return an array of n random numbers uniformly distributed
	42	// between 0 and 1 not included
	43	//
	44	for(Int_t i=0; i<size; i++)
	45	#ifdef CKNONE
	46	array[i]=fRandom->Rndm();
	47	#else
	48	do array[i]=fRandom->Rndm(); while(0>=array[i] \|\| array[i]>=1);
	49	#endif
	50	}
	51
65fb704d	52	//_____________________________________________________________________________
	53	void AliRndm::ReadRandom(const char *filename)
	54	{
	55	char *fntmp = gSystem->ExpandPathName(filename);
	56	TFile *file = new TFile(fntmp,"r");
	57	delete [] fntmp;
	58	if(!file) {
	59	printf("AliRndm:: Could not open file %s\n",filename);
	60	} else {
	61	if(!fRandom) fRandom = new TRandom();
	62	fRandom->Read("Random");
	63	file->Close();
	64	delete file;
	65	}
	66	}
	67
	68	//_____________________________________________________________________________
	69	void AliRndm::WriteRandom(const char *filename) const
	70	{
	71	char *fntmp = gSystem->ExpandPathName(filename);
	72	TFile *file = new TFile(fntmp,"new");
	73	delete [] fntmp;
	74	if(!file) {
	75	printf("AliRndm:: Could not open file %s\n",filename);
	76	} else {
	77	fRandom->Write();
	78	file->Close();
	79	delete file;
	80	}
	81	}