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a6e7b125 | 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 | // | |
8de97894 | 18 | // This is the base class for reading raw data and providing |
a6e7b125 | 19 | // information about digits |
20 | // | |
42d20574 | 21 | // The derived classes, which operate on concrete raw data formats, |
22 | // should implement | |
23 | // - ReadMiniHeader to read the next mini header | |
24 | // - ReadNextData to read the next raw data block (=1 DDL) | |
25 | // - ReadNext to read a given number of bytes | |
26 | // - several getters like GetType | |
27 | // | |
28 | // Sequential access to the raw data is provided by the methods | |
29 | // ReadMiniHeader, ReadNextData, ReadNextInt, ReadNextShort, ReadNextChar | |
30 | // | |
31 | // If only data from a specific detector (and a given range of DDL numbers) | |
32 | // should be read, this can be achieved by the Select method. | |
33 | // Several getter provide information about the current event and the | |
34 | // current type of raw data. | |
35 | // | |
a6e7b125 | 36 | /////////////////////////////////////////////////////////////////////////////// |
37 | ||
38 | #include "AliRawReader.h" | |
39 | ||
8de97894 | 40 | |
a6e7b125 | 41 | ClassImp(AliRawReader) |
42 | ||
43 | ||
8de97894 | 44 | AliRawReader::AliRawReader() |
a6e7b125 | 45 | { |
42d20574 | 46 | // default constructor: initialize data members |
47 | ||
8de97894 | 48 | fMiniHeader = NULL; |
a6e7b125 | 49 | fCount = 0; |
8de97894 | 50 | |
51 | fSelectDetectorID = -1; | |
52 | fSelectMinDDLID = -1; | |
53 | fSelectMaxDDLID = -1; | |
b4857df7 | 54 | |
55 | fErrorCode = 0; | |
a6e7b125 | 56 | } |
57 | ||
42d20574 | 58 | AliRawReader::AliRawReader(const AliRawReader& rawReader) : |
59 | TObject(rawReader) | |
60 | { | |
61 | // copy constructor | |
62 | ||
63 | fMiniHeader = rawReader.fMiniHeader; | |
64 | fCount = rawReader.fCount; | |
65 | ||
66 | fSelectDetectorID = rawReader.fSelectDetectorID; | |
67 | fSelectMinDDLID = rawReader.fSelectMinDDLID; | |
68 | fSelectMaxDDLID = rawReader.fSelectMaxDDLID; | |
b4857df7 | 69 | |
70 | fErrorCode = 0; | |
42d20574 | 71 | } |
72 | ||
73 | AliRawReader& AliRawReader::operator = (const AliRawReader& rawReader) | |
74 | { | |
75 | // assignment operator | |
76 | ||
77 | fMiniHeader = rawReader.fMiniHeader; | |
78 | fCount = rawReader.fCount; | |
79 | ||
80 | fSelectDetectorID = rawReader.fSelectDetectorID; | |
81 | fSelectMinDDLID = rawReader.fSelectMinDDLID; | |
82 | fSelectMaxDDLID = rawReader.fSelectMaxDDLID; | |
83 | ||
b4857df7 | 84 | fErrorCode = rawReader.fErrorCode; |
85 | ||
42d20574 | 86 | return *this; |
87 | } | |
88 | ||
8de97894 | 89 | |
90 | void AliRawReader::Select(Int_t detectorID, Int_t minDDLID, Int_t maxDDLID) | |
a6e7b125 | 91 | { |
8de97894 | 92 | // read only data of the detector with the given ID and in the given |
93 | // range of DDLs (minDDLID <= DDLID < maxDDLID). | |
94 | // no selection is applied if a value < 0 is used. | |
a6e7b125 | 95 | |
8de97894 | 96 | fSelectDetectorID = detectorID; |
97 | fSelectMinDDLID = minDDLID; | |
98 | fSelectMaxDDLID = maxDDLID; | |
99 | } | |
a6e7b125 | 100 | |
42d20574 | 101 | Bool_t AliRawReader::IsSelected() const |
a6e7b125 | 102 | { |
8de97894 | 103 | // apply the selection (if any) |
104 | ||
105 | if (fSelectDetectorID >= 0) { | |
106 | if (fMiniHeader->fDetectorID != fSelectDetectorID) return kFALSE; | |
107 | if ((fSelectMinDDLID >= 0) && (fMiniHeader->fDDLID < fSelectMinDDLID)) | |
108 | return kFALSE; | |
109 | if ((fSelectMaxDDLID >= 0) && (fMiniHeader->fDDLID >= fSelectMaxDDLID)) | |
110 | return kFALSE; | |
a6e7b125 | 111 | } |
8de97894 | 112 | return kTRUE; |
a6e7b125 | 113 | } |
114 | ||
115 | ||
b4857df7 | 116 | Bool_t AliRawReader::CheckMiniHeader(AliMiniHeader* miniHeader) const |
a6e7b125 | 117 | { |
8de97894 | 118 | // check the magic number of the mini header |
a6e7b125 | 119 | |
b4857df7 | 120 | if (!miniHeader) miniHeader = fMiniHeader; |
121 | if ((miniHeader->fMagicWord[2] != 0x12) || | |
122 | (miniHeader->fMagicWord[1] != 0x34) || | |
123 | (miniHeader->fMagicWord[0] != 0x56)) { | |
8de97894 | 124 | return kFALSE; |
a6e7b125 | 125 | } |
a6e7b125 | 126 | return kTRUE; |
127 | } | |
128 | ||
129 | Bool_t AliRawReader::ReadNextInt(UInt_t& data) | |
130 | { | |
8de97894 | 131 | // reads the next 4 bytes at the current position |
132 | // returns kFALSE if the data could not be read | |
a6e7b125 | 133 | |
134 | while (fCount == 0) { | |
135 | if (!ReadMiniHeader()) return kFALSE; | |
136 | } | |
8de97894 | 137 | if (fCount < (Int_t) sizeof(data)) { |
138 | Error("ReadNextInt", | |
139 | "too few data left (%d bytes) to read an UInt_t!", fCount); | |
140 | return kFALSE; | |
141 | } | |
142 | if (!ReadNext((UChar_t*) &data, sizeof(data))) { | |
a6e7b125 | 143 | Error("ReadNextInt", "could not read data!"); |
144 | return kFALSE; | |
145 | } | |
a6e7b125 | 146 | return kTRUE; |
147 | } | |
148 | ||
149 | Bool_t AliRawReader::ReadNextShort(UShort_t& data) | |
150 | { | |
8de97894 | 151 | // reads the next 2 bytes at the current position |
152 | // returns kFALSE if the data could not be read | |
a6e7b125 | 153 | |
154 | while (fCount == 0) { | |
155 | if (!ReadMiniHeader()) return kFALSE; | |
156 | } | |
8de97894 | 157 | if (fCount < (Int_t) sizeof(data)) { |
158 | Error("ReadNextShort", | |
159 | "too few data left (%d bytes) to read an UShort_t!", fCount); | |
160 | return kFALSE; | |
161 | } | |
162 | if (!ReadNext((UChar_t*) &data, sizeof(data))) { | |
a6e7b125 | 163 | Error("ReadNextShort", "could not read data!"); |
164 | return kFALSE; | |
165 | } | |
a6e7b125 | 166 | return kTRUE; |
167 | } | |
168 | ||
169 | Bool_t AliRawReader::ReadNextChar(UChar_t& data) | |
170 | { | |
171 | // reads the next 1 byte at the current stream position | |
8de97894 | 172 | // returns kFALSE if the data could not be read |
a6e7b125 | 173 | |
174 | while (fCount == 0) { | |
175 | if (!ReadMiniHeader()) return kFALSE; | |
176 | } | |
8de97894 | 177 | if (!ReadNext((UChar_t*) &data, sizeof(data))) { |
a6e7b125 | 178 | Error("ReadNextChar", "could not read data!"); |
179 | return kFALSE; | |
180 | } | |
a6e7b125 | 181 | return kTRUE; |
182 | } | |
183 | ||
b4857df7 | 184 | |
185 | Int_t AliRawReader::CheckData() const | |
186 | { | |
187 | // check the consistency of the data | |
188 | // derived classes should overwrite the default method which returns 0 (no err) | |
189 | ||
190 | return 0; | |
191 | } | |
192 |