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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 | /* $Id$ */ | |
17 | ||
18 | /////////////////////////////////////////////////////////////////////////////// | |
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 | /// | |
31 | /////////////////////////////////////////////////////////////////////////////// | |
32 | ||
33 | #include "AliRawReaderFile.h" | |
34 | #include <TSystem.h> | |
35 | ||
36 | ||
37 | ClassImp(AliRawReaderFile) | |
38 | ||
39 | ||
40 | AliRawReaderFile::AliRawReaderFile(Int_t eventNumber) : | |
41 | fEventIndex(eventNumber), | |
42 | fDirName("."), | |
43 | fDirectory(NULL), | |
44 | fStream(NULL), | |
45 | fEquipmentId(-1), | |
46 | fBuffer(NULL), | |
47 | fBufferSize(0) | |
48 | { | |
49 | // create an object to read digits from the given event | |
50 | // in the current directory | |
51 | ||
52 | fDirectory = OpenDirectory(); | |
53 | OpenNextFile(); | |
54 | fHeader = new AliRawDataHeader; | |
55 | } | |
56 | ||
57 | AliRawReaderFile::AliRawReaderFile(const char* dirName, Int_t eventNumber) : | |
58 | fEventIndex(eventNumber), | |
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 | ||
68 | fDirectory = OpenDirectory(); | |
69 | OpenNextFile(); | |
70 | fHeader = new AliRawDataHeader; | |
71 | } | |
72 | ||
73 | AliRawReaderFile::~AliRawReaderFile() | |
74 | { | |
75 | // close the input file | |
76 | ||
77 | if (fDirectory) gSystem->FreeDirectory(fDirectory); | |
78 | if (fStream) { | |
79 | #if defined(__HP_aCC) || defined(__DECCXX) | |
80 | if (fStream->rdbuf()->is_open()) fStream->close(); | |
81 | #else | |
82 | if (fStream->is_open()) fStream->close(); | |
83 | #endif | |
84 | delete fStream; | |
85 | } | |
86 | delete fHeader; | |
87 | if (fBuffer) delete[] fBuffer; | |
88 | } | |
89 | ||
90 | void AliRawReaderFile::RequireHeader(Bool_t required) | |
91 | { | |
92 | // Reading of raw data in case of missing | |
93 | // raw data header is not implemented for | |
94 | // this class | |
95 | if (!required) | |
96 | Fatal("AliRawReaderFile","Reading of raw data without raw data header is not implemented !"); | |
97 | ||
98 | AliRawReader::RequireHeader(required); | |
99 | } | |
100 | ||
101 | TString AliRawReaderFile::GetDirName() const | |
102 | { | |
103 | // return the current directory name | |
104 | ||
105 | TString dirName(fDirName); | |
106 | if (fEventIndex >= 0) { | |
107 | dirName += "/raw"; | |
108 | dirName += fEventIndex; | |
109 | } | |
110 | return dirName; | |
111 | } | |
112 | ||
113 | void* AliRawReaderFile::OpenDirectory() | |
114 | { | |
115 | // open and return the directory | |
116 | ||
117 | TString dirName = GetDirName(); | |
118 | void* directory = gSystem->OpenDirectory(dirName); | |
119 | if (!directory) { | |
120 | Error("OpenDirectory", "could not open directory %s", dirName.Data()); | |
121 | } | |
122 | return directory; | |
123 | } | |
124 | ||
125 | Bool_t AliRawReaderFile::OpenNextFile() | |
126 | { | |
127 | // open the next file | |
128 | // returns kFALSE if the current file is the last one | |
129 | ||
130 | if (fStream) { | |
131 | #if defined(__HP_aCC) || defined(__DECCXX) | |
132 | if (fStream->rdbuf()->is_open()) fStream->close(); | |
133 | #else | |
134 | if (fStream->is_open()) fStream->close(); | |
135 | #endif | |
136 | delete fStream; | |
137 | fStream = NULL; | |
138 | fEquipmentId = -1; | |
139 | } | |
140 | ||
141 | if (!fDirectory) return kFALSE; | |
142 | TString entry; | |
143 | while (entry = gSystem->GetDirEntry(fDirectory)) { | |
144 | if (entry.IsNull()) return kFALSE; | |
145 | if (!entry.EndsWith(".ddl")) continue; | |
146 | char* fileName = gSystem->ConcatFileName(GetDirName(), entry); | |
147 | #ifndef __DECCXX | |
148 | fStream = new fstream(fileName, ios::binary|ios::in); | |
149 | #else | |
150 | fStream = new fstream(fileName, ios::in); | |
151 | #endif | |
152 | break; | |
153 | } | |
154 | ||
155 | if (!fStream) return kFALSE; | |
156 | entry.Remove(0, entry.Last('_')+1); | |
157 | entry.Remove(entry.Length()-4); | |
158 | fEquipmentId = atoi(entry.Data()); | |
159 | #if defined(__HP_aCC) || defined(__DECCXX) | |
160 | return (fStream->rdbuf()->is_open()); | |
161 | #else | |
162 | return (fStream->is_open()); | |
163 | #endif | |
164 | } | |
165 | ||
166 | ||
167 | Bool_t AliRawReaderFile::ReadHeader() | |
168 | { | |
169 | // read a data header at the current stream position | |
170 | // returns kFALSE if the mini header could not be read | |
171 | ||
172 | if (!fStream) return kFALSE; | |
173 | do { | |
174 | if (fCount > 0) fStream->seekg(Int_t(fStream->tellg()) + fCount); | |
175 | while (!fStream->read((char*) fHeader, sizeof(AliRawDataHeader))) { | |
176 | if (!OpenNextFile()) return kFALSE; | |
177 | } | |
178 | if (fHeader->fSize != 0xFFFFFFFF) { | |
179 | fCount = fHeader->fSize - sizeof(AliRawDataHeader); | |
180 | } else { | |
181 | UInt_t currentPos = fStream->tellg(); | |
182 | fStream->seekg(0, ios::end); | |
183 | fCount = UInt_t(fStream->tellg()) - currentPos; | |
184 | fStream->seekg(currentPos); | |
185 | } | |
186 | } while (!IsSelected()); | |
187 | return kTRUE; | |
188 | } | |
189 | ||
190 | Bool_t AliRawReaderFile::ReadNextData(UChar_t*& data) | |
191 | { | |
192 | // reads the next payload at the current stream position | |
193 | // returns kFALSE if the data could not be read | |
194 | ||
195 | while (fCount == 0) { | |
196 | if (!ReadHeader()) return kFALSE; | |
197 | } | |
198 | if (fBufferSize < fCount) { | |
199 | if (fBuffer) delete[] fBuffer; | |
200 | fBufferSize = Int_t(fCount*1.2); | |
201 | fBuffer = new UChar_t[fBufferSize]; | |
202 | } | |
203 | if (!fStream->read((char*) fBuffer, fCount)) { | |
204 | Error("ReadNext", "could not read data!"); | |
205 | return kFALSE; | |
206 | } | |
207 | fCount = 0; | |
208 | ||
209 | data = fBuffer; | |
210 | return kTRUE; | |
211 | } | |
212 | ||
213 | Bool_t AliRawReaderFile::ReadNext(UChar_t* data, Int_t size) | |
214 | { | |
215 | // reads the next block of data at the current stream position | |
216 | // returns kFALSE if the data could not be read | |
217 | ||
218 | if (!fStream->read((char*) data, size)) { | |
219 | Error("ReadNext", "could not read data!"); | |
220 | return kFALSE; | |
221 | } | |
222 | fCount -= size; | |
223 | return kTRUE; | |
224 | } | |
225 | ||
226 | ||
227 | Bool_t AliRawReaderFile::Reset() | |
228 | { | |
229 | // reset the current stream position to the first DDL file of the curevent | |
230 | ||
231 | void* directory = OpenDirectory(); | |
232 | if (!directory) return kFALSE; | |
233 | ||
234 | if (fStream) { | |
235 | #if defined(__HP_aCC) || defined(__DECCXX) | |
236 | if (fStream->rdbuf()->is_open()) fStream->close(); | |
237 | #else | |
238 | if (fStream->is_open()) fStream->close(); | |
239 | #endif | |
240 | delete fStream; | |
241 | fStream = NULL; | |
242 | } | |
243 | ||
244 | if (fDirectory) gSystem->FreeDirectory(fDirectory); | |
245 | fDirectory = directory; | |
246 | ||
247 | OpenNextFile(); | |
248 | fCount = 0; | |
249 | return kTRUE; | |
250 | } | |
251 | ||
252 | Bool_t AliRawReaderFile::NextEvent() | |
253 | { | |
254 | // go to the next event directory | |
255 | ||
256 | if (fEventIndex < -1) return kFALSE; | |
257 | ||
258 | do { | |
259 | TString dirName = fDirName + "/raw"; | |
260 | dirName += (fEventIndex + 1); | |
261 | void* directory = gSystem->OpenDirectory(dirName); | |
262 | if (!directory) return kFALSE; | |
263 | gSystem->FreeDirectory(directory); | |
264 | ||
265 | fEventIndex++; | |
266 | Reset(); | |
267 | } while (!IsEventSelected()); | |
268 | ||
269 | fEventNumber++; | |
270 | ||
271 | return kTRUE; | |
272 | } | |
273 | ||
274 | Bool_t AliRawReaderFile::RewindEvents() | |
275 | { | |
276 | // reset the event counter | |
277 | ||
278 | if (fEventIndex >= 0) fEventIndex = -1; | |
279 | fEventNumber = -1; | |
280 | return Reset(); | |
281 | } |