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04fa961a | 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 | ||
bea6b2a4 | 16 | /* $Id$ */ |
17 | ||
04fa961a | 18 | /////////////////////////////////////////////////////////////////////////////// |
bea6b2a4 | 19 | /// |
20 | /// This is a class for reading raw data files. | |
21 | /// | |
22 | /// The files of one event are expected to be in one directory. The name | |
23 | /// of the directory is "raw" + the event number. Each file contains | |
24 | /// the raw data (with data header) of one DDL. The convention for the | |
25 | /// file names is "DET_#DDL.ddl". "DET" is the name of the detector and | |
26 | /// "#DDL" is the unique equipment ID. | |
27 | /// | |
28 | /// The constructor of AliRawReaderFile takes the event number or the | |
29 | /// directory name as argument. | |
30 | /// | |
04fa961a | 31 | /////////////////////////////////////////////////////////////////////////////// |
32 | ||
33 | #include "AliRawReaderFile.h" | |
39f9963f | 34 | #include <TSystem.h> |
04fa961a | 35 | |
36 | ||
37 | ClassImp(AliRawReaderFile) | |
38 | ||
39 | ||
39f9963f | 40 | AliRawReaderFile::AliRawReaderFile(Int_t eventNumber) : |
dd9a70fe | 41 | fEventIndex(eventNumber), |
42 | fDirName("."), | |
39f9963f | 43 | fDirectory(NULL), |
44 | fStream(NULL), | |
45 | fEquipmentId(-1), | |
46 | fBuffer(NULL), | |
47 | fBufferSize(0) | |
04fa961a | 48 | { |
39f9963f | 49 | // create an object to read digits from the given event |
dd9a70fe | 50 | // in the current directory |
04fa961a | 51 | |
dd9a70fe | 52 | fDirectory = OpenDirectory(); |
39f9963f | 53 | OpenNextFile(); |
54 | fHeader = new AliRawDataHeader; | |
55 | } | |
56 | ||
dd9a70fe | 57 | AliRawReaderFile::AliRawReaderFile(const char* dirName, Int_t eventNumber) : |
58 | fEventIndex(eventNumber), | |
39f9963f | 59 | fDirName(dirName), |
60 | fDirectory(NULL), | |
61 | fStream(NULL), | |
62 | fEquipmentId(-1), | |
63 | fBuffer(NULL), | |
64 | fBufferSize(0) | |
65 | { | |
66 | // create an object to read digits from the given directory | |
67 | ||
dd9a70fe | 68 | fDirectory = OpenDirectory(); |
39f9963f | 69 | OpenNextFile(); |
70 | fHeader = new AliRawDataHeader; | |
04fa961a | 71 | } |
72 | ||
42d20574 | 73 | AliRawReaderFile::AliRawReaderFile(const AliRawReaderFile& rawReader) : |
74 | AliRawReader(rawReader) | |
75 | { | |
76 | Fatal("AliRawReaderFile", "copy constructor not implemented"); | |
77 | } | |
78 | ||
79 | AliRawReaderFile& AliRawReaderFile::operator = (const AliRawReaderFile& | |
80 | /* rawReader */) | |
81 | { | |
82 | Fatal("operator =", "assignment operator not implemented"); | |
83 | return *this; | |
84 | } | |
85 | ||
04fa961a | 86 | AliRawReaderFile::~AliRawReaderFile() |
87 | { | |
88 | // close the input file | |
89 | ||
39f9963f | 90 | if (fDirectory) gSystem->FreeDirectory(fDirectory); |
04fa961a | 91 | if (fStream) { |
92 | #if defined(__HP_aCC) || defined(__DECCXX) | |
93 | if (fStream->rdbuf()->is_open()) fStream->close(); | |
94 | #else | |
95 | if (fStream->is_open()) fStream->close(); | |
96 | #endif | |
97 | delete fStream; | |
98 | } | |
39f9963f | 99 | delete fHeader; |
04fa961a | 100 | if (fBuffer) delete[] fBuffer; |
101 | } | |
102 | ||
103 | ||
dd9a70fe | 104 | TString AliRawReaderFile::GetDirName() const |
105 | { | |
106 | // return the current directory name | |
107 | ||
108 | TString dirName(fDirName); | |
109 | if (fEventIndex >= 0) { | |
110 | dirName += "/raw"; | |
111 | dirName += fEventIndex; | |
112 | } | |
113 | return dirName; | |
114 | } | |
115 | ||
116 | void* AliRawReaderFile::OpenDirectory() | |
117 | { | |
118 | // open and return the directory | |
119 | ||
120 | TString dirName = GetDirName(); | |
121 | void* directory = gSystem->OpenDirectory(dirName); | |
122 | if (!directory) { | |
123 | Error("OpenDirectory", "could not open directory %s", dirName.Data()); | |
124 | } | |
125 | return directory; | |
126 | } | |
127 | ||
04fa961a | 128 | Bool_t AliRawReaderFile::OpenNextFile() |
129 | { | |
42d20574 | 130 | // open the next file |
131 | // returns kFALSE if the current file is the last one | |
132 | ||
04fa961a | 133 | if (fStream) { |
134 | #if defined(__HP_aCC) || defined(__DECCXX) | |
135 | if (fStream->rdbuf()->is_open()) fStream->close(); | |
136 | #else | |
137 | if (fStream->is_open()) fStream->close(); | |
138 | #endif | |
139 | delete fStream; | |
140 | fStream = NULL; | |
39f9963f | 141 | fEquipmentId = -1; |
04fa961a | 142 | } |
04fa961a | 143 | |
39f9963f | 144 | if (!fDirectory) return kFALSE; |
145 | TString entry; | |
146 | while (entry = gSystem->GetDirEntry(fDirectory)) { | |
147 | if (entry.IsNull()) return kFALSE; | |
148 | if (!entry.EndsWith(".ddl")) continue; | |
dd9a70fe | 149 | char* fileName = gSystem->ConcatFileName(GetDirName(), entry); |
04fa961a | 150 | #ifndef __DECCXX |
39f9963f | 151 | fStream = new fstream(fileName, ios::binary|ios::in); |
04fa961a | 152 | #else |
39f9963f | 153 | fStream = new fstream(fileName, ios::in); |
04fa961a | 154 | #endif |
39f9963f | 155 | break; |
156 | } | |
157 | ||
158 | if (!fStream) return kFALSE; | |
159 | entry.Remove(0, entry.Last('_')+1); | |
160 | entry.Remove(entry.Length()-4); | |
161 | fEquipmentId = atoi(entry.Data()); | |
04fa961a | 162 | #if defined(__HP_aCC) || defined(__DECCXX) |
163 | return (fStream->rdbuf()->is_open()); | |
164 | #else | |
165 | return (fStream->is_open()); | |
166 | #endif | |
167 | } | |
168 | ||
169 | ||
39f9963f | 170 | Bool_t AliRawReaderFile::ReadHeader() |
04fa961a | 171 | { |
39f9963f | 172 | // read a data header at the current stream position |
04fa961a | 173 | // returns kFALSE if the mini header could not be read |
174 | ||
175 | if (!fStream) return kFALSE; | |
176 | do { | |
177 | if (fCount > 0) fStream->seekg(Int_t(fStream->tellg()) + fCount); | |
39f9963f | 178 | while (!fStream->read((char*) fHeader, sizeof(AliRawDataHeader))) { |
04fa961a | 179 | if (!OpenNextFile()) return kFALSE; |
180 | } | |
39f9963f | 181 | if (fHeader->fSize != 0xFFFFFFFF) { |
182 | fCount = fHeader->fSize - sizeof(AliRawDataHeader); | |
183 | } else { | |
184 | UInt_t currentPos = fStream->tellg(); | |
185 | fStream->seekg(0, ios::end); | |
186 | fCount = UInt_t(fStream->tellg()) - currentPos; | |
187 | fStream->seekg(currentPos); | |
188 | } | |
04fa961a | 189 | } while (!IsSelected()); |
190 | return kTRUE; | |
191 | } | |
192 | ||
193 | Bool_t AliRawReaderFile::ReadNextData(UChar_t*& data) | |
194 | { | |
195 | // reads the next payload at the current stream position | |
196 | // returns kFALSE if the data could not be read | |
197 | ||
198 | while (fCount == 0) { | |
39f9963f | 199 | if (!ReadHeader()) return kFALSE; |
04fa961a | 200 | } |
201 | if (fBufferSize < fCount) { | |
202 | if (fBuffer) delete[] fBuffer; | |
203 | fBufferSize = Int_t(fCount*1.2); | |
204 | fBuffer = new UChar_t[fBufferSize]; | |
205 | } | |
206 | if (!fStream->read((char*) fBuffer, fCount)) { | |
207 | Error("ReadNext", "could not read data!"); | |
208 | return kFALSE; | |
209 | } | |
210 | fCount = 0; | |
211 | ||
212 | data = fBuffer; | |
213 | return kTRUE; | |
214 | } | |
215 | ||
216 | Bool_t AliRawReaderFile::ReadNext(UChar_t* data, Int_t size) | |
217 | { | |
218 | // reads the next block of data at the current stream position | |
219 | // returns kFALSE if the data could not be read | |
220 | ||
221 | if (!fStream->read((char*) data, size)) { | |
222 | Error("ReadNext", "could not read data!"); | |
223 | return kFALSE; | |
224 | } | |
225 | fCount -= size; | |
226 | return kTRUE; | |
227 | } | |
228 | ||
229 | ||
230 | Bool_t AliRawReaderFile::Reset() | |
231 | { | |
dd9a70fe | 232 | // reset the current stream position to the first DDL file of the curevent |
04fa961a | 233 | |
dd9a70fe | 234 | void* directory = OpenDirectory(); |
235 | if (!directory) return kFALSE; | |
39f9963f | 236 | |
237 | if (fStream) { | |
04fa961a | 238 | #if defined(__HP_aCC) || defined(__DECCXX) |
239 | if (fStream->rdbuf()->is_open()) fStream->close(); | |
240 | #else | |
241 | if (fStream->is_open()) fStream->close(); | |
242 | #endif | |
243 | delete fStream; | |
244 | fStream = NULL; | |
04fa961a | 245 | } |
246 | ||
39f9963f | 247 | if (fDirectory) gSystem->FreeDirectory(fDirectory); |
248 | fDirectory = directory; | |
04fa961a | 249 | |
39f9963f | 250 | OpenNextFile(); |
04fa961a | 251 | fCount = 0; |
252 | return kTRUE; | |
253 | } | |
254 | ||
dd9a70fe | 255 | Bool_t AliRawReaderFile::NextEvent() |
256 | { | |
257 | // go to the next event directory | |
258 | ||
259 | if (fEventIndex < -1) return kFALSE; | |
260 | ||
261 | do { | |
262 | TString dirName = fDirName + "/raw"; | |
263 | dirName += (fEventIndex + 1); | |
264 | void* directory = gSystem->OpenDirectory(dirName); | |
265 | if (!directory) return kFALSE; | |
266 | gSystem->FreeDirectory(directory); | |
267 | ||
268 | fEventIndex++; | |
269 | Reset(); | |
270 | } while (!IsEventSelected()); | |
271 | ||
272 | return kTRUE; | |
273 | } | |
274 | ||
275 | Bool_t AliRawReaderFile::RewindEvents() | |
276 | { | |
277 | // reset the event counter | |
278 | ||
279 | if (fEventIndex >= 0) fEventIndex = -1; | |
280 | return Reset(); | |
281 | } |