fForceDecay initialized to kAll in constructors
[u/mrichter/AliRoot.git] / STEER / AliRndm.cxx
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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
acd84897 16/* $Id$ */
65fb704d 17
18///////////////////////////////////////////////////////////////////////////////
19// //
20// //
21///////////////////////////////////////////////////////////////////////////////
22
65fb704d 23#include "TFile.h"
e2afb3b6 24#include "TError.h"
25#include "TRandom3.h"
26#include "TSystem.h"
65fb704d 27
28#include "AliRndm.h"
65fb704d 29
30ClassImp(AliRndm)
31
e2afb3b6 32//_______________________________________________________________________
33AliRndm::AliRndm():
7cdba479 34 fRandom(gRandom)
e2afb3b6 35{
36 //
37 // Default ctor
38 //
e2afb3b6 39}
40
41//_______________________________________________________________________
42AliRndm::AliRndm(const AliRndm& rn):
7cdba479 43 fRandom(gRandom)
e2afb3b6 44{
45 //
46 // Copy constructor
47 //
48 rn.Copy(*this);
49}
50
51//_______________________________________________________________________
52void AliRndm::Copy(AliRndm&) const
53{
54 ::Fatal("Copy","Not implemented\n");
55}
56
65fb704d 57
58//_____________________________________________________________________________
fea8896f 59void AliRndm::Rndm(Float_t* array, Int_t size) const
65fb704d 60{
61 //
62 // Return an array of n random numbers uniformly distributed
63 // between 0 and 1 not included
64 //
65 for(Int_t i=0; i<size; i++)
66#ifdef CKNONE
67 array[i]=fRandom->Rndm();
68#else
69 do array[i]=fRandom->Rndm(); while(0>=array[i] || array[i]>=1);
70#endif
71}
72
73//_____________________________________________________________________________
65fb704d 74void AliRndm::ReadRandom(const char *filename)
75{
b23a502f 76 //
77 // Reads saved random generator status from filename
78 //
65fb704d 79 char *fntmp = gSystem->ExpandPathName(filename);
88cb7938 80 TFile *file = new TFile(fntmp,"r");
65fb704d 81 delete [] fntmp;
82 if(!file) {
83 printf("AliRndm:: Could not open file %s\n",filename);
84 } else {
85 if(!fRandom) fRandom = new TRandom();
88cb7938 86 fRandom->Read("Random");
65fb704d 87 file->Close();
88 delete file;
89 }
90}
91
92//_____________________________________________________________________________
93void AliRndm::WriteRandom(const char *filename) const
94{
b23a502f 95 //
96 // Writes random generator status to filename
97 //
65fb704d 98 char *fntmp = gSystem->ExpandPathName(filename);
88cb7938 99 TFile *file = new TFile(fntmp,"new");
65fb704d 100 delete [] fntmp;
101 if(!file) {
102 printf("AliRndm:: Could not open file %s\n",filename);
103 } else {
104 fRandom->Write();
105 file->Close();
106 delete file;
107 }
108}