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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 | // // | |
116cbefd | 20 | // Wrapper for the root random number generator // |
65fb704d | 21 | // // |
22 | /////////////////////////////////////////////////////////////////////////////// | |
23 | ||
65fb704d | 24 | #include "TFile.h" |
e2afb3b6 | 25 | #include "TError.h" |
26 | #include "TRandom3.h" | |
27 | #include "TSystem.h" | |
65fb704d | 28 | |
29 | #include "AliRndm.h" | |
65fb704d | 30 | |
31 | ClassImp(AliRndm) | |
32 | ||
e2afb3b6 | 33 | //_______________________________________________________________________ |
34 | AliRndm::AliRndm(): | |
35 | fRandom(0) | |
36 | { | |
37 | // | |
38 | // Default ctor | |
39 | // | |
40 | SetRandom(); | |
41 | } | |
42 | ||
43 | //_______________________________________________________________________ | |
44 | AliRndm::AliRndm(const AliRndm& rn): | |
45 | fRandom(0) | |
46 | { | |
47 | // | |
48 | // Copy constructor | |
49 | // | |
50 | rn.Copy(*this); | |
51 | } | |
52 | ||
53 | //_______________________________________________________________________ | |
54 | void AliRndm::Copy(AliRndm&) const | |
55 | { | |
56 | ::Fatal("Copy","Not implemented\n"); | |
57 | } | |
58 | ||
65fb704d | 59 | |
60 | //_____________________________________________________________________________ | |
61 | void AliRndm::Rndm(Float_t* array, const Int_t size) const | |
62 | { | |
63 | // | |
64 | // Return an array of n random numbers uniformly distributed | |
65 | // between 0 and 1 not included | |
66 | // | |
67 | for(Int_t i=0; i<size; i++) | |
68 | #ifdef CKNONE | |
69 | array[i]=fRandom->Rndm(); | |
70 | #else | |
71 | do array[i]=fRandom->Rndm(); while(0>=array[i] || array[i]>=1); | |
72 | #endif | |
73 | } | |
74 | ||
65fb704d | 75 | //_____________________________________________________________________________ |
76 | void AliRndm::ReadRandom(const char *filename) | |
77 | { | |
b23a502f | 78 | // |
79 | // Reads saved random generator status from filename | |
80 | // | |
65fb704d | 81 | char *fntmp = gSystem->ExpandPathName(filename); |
82 | TFile *file = new TFile(fntmp,"r"); | |
83 | delete [] fntmp; | |
84 | if(!file) { | |
85 | printf("AliRndm:: Could not open file %s\n",filename); | |
86 | } else { | |
87 | if(!fRandom) fRandom = new TRandom(); | |
88 | fRandom->Read("Random"); | |
89 | file->Close(); | |
90 | delete file; | |
91 | } | |
92 | } | |
93 | ||
94 | //_____________________________________________________________________________ | |
95 | void AliRndm::WriteRandom(const char *filename) const | |
96 | { | |
b23a502f | 97 | // |
98 | // Writes random generator status to filename | |
99 | // | |
65fb704d | 100 | char *fntmp = gSystem->ExpandPathName(filename); |
101 | TFile *file = new TFile(fntmp,"new"); | |
102 | delete [] fntmp; | |
103 | if(!file) { | |
104 | printf("AliRndm:: Could not open file %s\n",filename); | |
105 | } else { | |
106 | fRandom->Write(); | |
107 | file->Close(); | |
108 | delete file; | |
109 | } | |
110 | } |