1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
16 ///////////////////////////////////////////////////////////////////////////////
18 // This is the base class for reading raw data and providing
19 // information about digits
21 // The derived classes, which operate on concrete raw data formats,
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
28 // Sequential access to the raw data is provided by the methods
29 // ReadMiniHeader, ReadNextData, ReadNextInt, ReadNextShort, ReadNextChar
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.
36 ///////////////////////////////////////////////////////////////////////////////
38 #include "AliRawReader.h"
41 ClassImp(AliRawReader)
44 AliRawReader::AliRawReader()
46 // default constructor: initialize data members
51 fSelectDetectorID = -1;
58 AliRawReader::AliRawReader(const AliRawReader& rawReader) :
63 fMiniHeader = rawReader.fMiniHeader;
64 fCount = rawReader.fCount;
66 fSelectDetectorID = rawReader.fSelectDetectorID;
67 fSelectMinDDLID = rawReader.fSelectMinDDLID;
68 fSelectMaxDDLID = rawReader.fSelectMaxDDLID;
73 AliRawReader& AliRawReader::operator = (const AliRawReader& rawReader)
75 // assignment operator
77 fMiniHeader = rawReader.fMiniHeader;
78 fCount = rawReader.fCount;
80 fSelectDetectorID = rawReader.fSelectDetectorID;
81 fSelectMinDDLID = rawReader.fSelectMinDDLID;
82 fSelectMaxDDLID = rawReader.fSelectMaxDDLID;
84 fErrorCode = rawReader.fErrorCode;
90 void AliRawReader::Select(Int_t detectorID, Int_t minDDLID, Int_t maxDDLID)
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.
96 fSelectDetectorID = detectorID;
97 fSelectMinDDLID = minDDLID;
98 fSelectMaxDDLID = maxDDLID;
101 Bool_t AliRawReader::IsSelected() const
103 // apply the selection (if any)
105 if (fSelectDetectorID >= 0) {
106 if (fMiniHeader->fDetectorID != fSelectDetectorID) return kFALSE;
107 if ((fSelectMinDDLID >= 0) && (fMiniHeader->fDDLID < fSelectMinDDLID))
109 if ((fSelectMaxDDLID >= 0) && (fMiniHeader->fDDLID >= fSelectMaxDDLID))
116 Bool_t AliRawReader::CheckMiniHeader(AliMiniHeader* miniHeader) const
118 // check the magic number of the mini header
120 if (!miniHeader) miniHeader = fMiniHeader;
121 if ((miniHeader->fMagicWord[2] != 0x12) ||
122 (miniHeader->fMagicWord[1] != 0x34) ||
123 (miniHeader->fMagicWord[0] != 0x56)) {
129 Bool_t AliRawReader::ReadNextInt(UInt_t& data)
131 // reads the next 4 bytes at the current position
132 // returns kFALSE if the data could not be read
134 while (fCount == 0) {
135 if (!ReadMiniHeader()) return kFALSE;
137 if (fCount < (Int_t) sizeof(data)) {
139 "too few data left (%d bytes) to read an UInt_t!", fCount);
142 if (!ReadNext((UChar_t*) &data, sizeof(data))) {
143 Error("ReadNextInt", "could not read data!");
149 Bool_t AliRawReader::ReadNextShort(UShort_t& data)
151 // reads the next 2 bytes at the current position
152 // returns kFALSE if the data could not be read
154 while (fCount == 0) {
155 if (!ReadMiniHeader()) return kFALSE;
157 if (fCount < (Int_t) sizeof(data)) {
158 Error("ReadNextShort",
159 "too few data left (%d bytes) to read an UShort_t!", fCount);
162 if (!ReadNext((UChar_t*) &data, sizeof(data))) {
163 Error("ReadNextShort", "could not read data!");
169 Bool_t AliRawReader::ReadNextChar(UChar_t& data)
171 // reads the next 1 byte at the current stream position
172 // returns kFALSE if the data could not be read
174 while (fCount == 0) {
175 if (!ReadMiniHeader()) return kFALSE;
177 if (!ReadNext((UChar_t*) &data, sizeof(data))) {
178 Error("ReadNextChar", "could not read data!");
185 Int_t AliRawReader::CheckData() const
187 // check the consistency of the data
188 // derived classes should overwrite the default method which returns 0 (no err)