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;
56 AliRawReader::AliRawReader(const AliRawReader& rawReader) :
61 fMiniHeader = rawReader.fMiniHeader;
62 fCount = rawReader.fCount;
64 fSelectDetectorID = rawReader.fSelectDetectorID;
65 fSelectMinDDLID = rawReader.fSelectMinDDLID;
66 fSelectMaxDDLID = rawReader.fSelectMaxDDLID;
69 AliRawReader& AliRawReader::operator = (const AliRawReader& rawReader)
71 // assignment operator
73 fMiniHeader = rawReader.fMiniHeader;
74 fCount = rawReader.fCount;
76 fSelectDetectorID = rawReader.fSelectDetectorID;
77 fSelectMinDDLID = rawReader.fSelectMinDDLID;
78 fSelectMaxDDLID = rawReader.fSelectMaxDDLID;
84 void AliRawReader::Select(Int_t detectorID, Int_t minDDLID, Int_t maxDDLID)
86 // read only data of the detector with the given ID and in the given
87 // range of DDLs (minDDLID <= DDLID < maxDDLID).
88 // no selection is applied if a value < 0 is used.
90 fSelectDetectorID = detectorID;
91 fSelectMinDDLID = minDDLID;
92 fSelectMaxDDLID = maxDDLID;
95 Bool_t AliRawReader::IsSelected() const
97 // apply the selection (if any)
99 if (fSelectDetectorID >= 0) {
100 if (fMiniHeader->fDetectorID != fSelectDetectorID) return kFALSE;
101 if ((fSelectMinDDLID >= 0) && (fMiniHeader->fDDLID < fSelectMinDDLID))
103 if ((fSelectMaxDDLID >= 0) && (fMiniHeader->fDDLID >= fSelectMaxDDLID))
110 Bool_t AliRawReader::CheckMiniHeader() const
112 // check the magic number of the mini header
114 if ((fMiniHeader->fMagicWord[2] != 0x12) ||
115 (fMiniHeader->fMagicWord[1] != 0x34) ||
116 (fMiniHeader->fMagicWord[0] != 0x56)) {
117 Error("CheckMiniHeader", "wrong magic word!");
123 Bool_t AliRawReader::ReadNextInt(UInt_t& data)
125 // reads the next 4 bytes at the current position
126 // returns kFALSE if the data could not be read
128 while (fCount == 0) {
129 if (!ReadMiniHeader()) return kFALSE;
131 if (fCount < (Int_t) sizeof(data)) {
133 "too few data left (%d bytes) to read an UInt_t!", fCount);
136 if (!ReadNext((UChar_t*) &data, sizeof(data))) {
137 Error("ReadNextInt", "could not read data!");
143 Bool_t AliRawReader::ReadNextShort(UShort_t& data)
145 // reads the next 2 bytes at the current position
146 // returns kFALSE if the data could not be read
148 while (fCount == 0) {
149 if (!ReadMiniHeader()) return kFALSE;
151 if (fCount < (Int_t) sizeof(data)) {
152 Error("ReadNextShort",
153 "too few data left (%d bytes) to read an UShort_t!", fCount);
156 if (!ReadNext((UChar_t*) &data, sizeof(data))) {
157 Error("ReadNextShort", "could not read data!");
163 Bool_t AliRawReader::ReadNextChar(UChar_t& data)
165 // reads the next 1 byte at the current stream position
166 // returns kFALSE if the data could not be read
168 while (fCount == 0) {
169 if (!ReadMiniHeader()) return kFALSE;
171 if (!ReadNext((UChar_t*) &data, sizeof(data))) {
172 Error("ReadNextChar", "could not read data!");