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2e9f335b | 1 | /* Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. * |
2 | * See cxx source for full Copyright notice */ | |
3 | ||
4 | ///////////////////////////////////////////////////// | |
5 | // Class used for read-write the ALTRO data format // | |
6 | ///////////////////////////////////////////////////// | |
7 | ||
8 | /*This class is an interface between the altro format file and the | |
9 | user, and can be used in write or read mode | |
10 | In the write mode a new altro file is created and filled using the method FillBuffer(). | |
11 | The name of the file is specified as parameter in the constructor as well as the type mode. | |
12 | In the Read mode the specified file is open and the values can be read using the | |
13 | methods GetNext() and GetNextBackWord(). | |
14 | The first method is used to read the file forward while the second is used to read backward | |
15 | */ | |
16 | ||
17 | #ifndef AliTPCBUFFER160_H | |
18 | #define AliTPCBUFFER160_H | |
b62e2a95 | 19 | #ifdef __CINT__ |
20 | class fstream; | |
21 | #else | |
8569a2b0 | 22 | #include "Riostream.h" |
b62e2a95 | 23 | #endif |
24 | ||
8569a2b0 | 25 | |
2e9f335b | 26 | class AliTPCBuffer160:public TObject{ |
27 | public: | |
28 | AliTPCBuffer160(){}//default constructor | |
29 | AliTPCBuffer160(const char* fileName,Int_t flag);//constructor | |
30 | virtual ~AliTPCBuffer160();//destructor | |
31 | AliTPCBuffer160(const AliTPCBuffer160 &source); // copy constructor | |
32 | AliTPCBuffer160& operator=(const AliTPCBuffer160 &source); // ass. op. | |
33 | void FillBuffer(Int_t Val); | |
a79660fb | 34 | //this method store a word into the buffer |
2e9f335b | 35 | Int_t GetFreeCellNumber()const{return fFreeCellBuffer;} |
a79660fb | 36 | //this method return the number of free cells of the internal buffer |
2e9f335b | 37 | Int_t GetNextBackWord(); |
a79660fb | 38 | //this method return the next word of 10 bit (reading the file backward) if it exists -1 otherwise |
2e9f335b | 39 | Int_t GetNext(); |
a79660fb | 40 | //this method return the next word of 10 bit (reading the file forward) if it exists -1 otherwise |
2e9f335b | 41 | void WriteTrailer(Int_t WordsNumber,Int_t PadNumber,Int_t RowNumber,Int_t SecNumber); |
a79660fb | 42 | //this method is used to write the trailer |
2e9f335b | 43 | void ReadTrailer(Int_t &WordsNumber,Int_t &PadNumber,Int_t &RowNumber,Int_t &SecNumber); |
a79660fb | 44 | //this method is used to read the trailer when the file is read forward |
2e9f335b | 45 | Int_t ReadTrailerBackward(Int_t &WordsNumber,Int_t &PadNumber,Int_t &RowNumber,Int_t &SecNumber); |
a79660fb | 46 | //this method is used to read the trailer when the file is read backward |
2e9f335b | 47 | void WriteMiniHeader(ULong_t Size,Int_t SecNumber,Int_t SubSector,Int_t Detector,Int_t Flag ); |
a79660fb | 48 | //this method is used to write the Mini header |
49 | void SetVerbose(Int_t val){fVerbose=val;} | |
50 | //this method is used to set the verbose level | |
2e9f335b | 51 | //level 0 no output messages |
52 | //level !=0 some messages are displayed during the run | |
2e9f335b | 53 | void Flush(); |
a79660fb | 54 | //this method is used to fill the buffer with 2AA hexadecimal value and save it into the output file |
55 | Int_t GetFillWordsNum()const{return fEndingFillWords;} | |
2e9f335b | 56 | private: |
2e9f335b | 57 | void PackWord(ULong_t &BaseWord, ULong_t Word, Int_t StartBit, Int_t StopBit); |
a79660fb | 58 | //this method is used to pack bits into a word of 32 bits |
2e9f335b | 59 | void UnpackWord(ULong_t PackedWord, Int_t StartBit, Int_t StopBit, ULong_t &Word); |
a79660fb | 60 | //this method is used to read a precise number of bits from a word of 32 bits |
2e9f335b | 61 | ULong_t fBuffer[5]; //Buffer dimension is 32*5=160 bits and it contains 16 values |
62 | //A value is never splitted in two Buffer | |
63 | ||
64 | ||
a79660fb | 65 | Int_t fShift; //This variable contains the number of free bits in the current cell of |
2e9f335b | 66 | //the Buffer after that the value Val is been inserted. |
67 | //size of Int_t is 32 bit that is the same size of a cell of Buffer so | |
a79660fb | 68 | //the shift operation are performed only on value Val. |
2e9f335b | 69 | Int_t fCurrentCell; //This variable contains the cell number of the cell currently used |
70 | Int_t fFreeCellBuffer;//number of free cells of the buffer | |
71 | Int_t fFlag; //0 read 1 write | |
72 | Int_t fVerbose; //verbose level | |
73 | fstream f; //logical name of the I/O file | |
7c27857f | 74 | Int_t fMaskBackward; //bit mask for backward reading of a file |
2e9f335b | 75 | ULong_t fFilePosition;//'pointer' to the actual position in the file |
76 | ULong_t fFileEnd; //position of the last element of the file (File dimension) | |
77 | ULong_t fMiniHeaderPos;//Mini header position | |
7c27857f | 78 | Int_t fEndingFillWords;//Few words at the end of the stream |
2e9f335b | 79 | ClassDef(AliTPCBuffer160,1) |
80 | }; | |
81 | ||
82 | #endif |