]>
Commit | Line | Data |
---|---|---|
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 | |
19 | ||
20 | #include <TObject.h> | |
21 | #ifdef __CINT__ | |
22 | class fstream; | |
23 | #else | |
24 | #include "Riostream.h" | |
25 | #endif | |
26 | ||
27 | ||
28 | class AliTPCBuffer160:public TObject{ | |
29 | public: | |
30 | AliTPCBuffer160(){}//default constructor | |
31 | AliTPCBuffer160(const char* fileName,Int_t flag);//constructor | |
32 | AliTPCBuffer160(fstream* file, Int_t size);//constructor for reading a file with mini header | |
33 | virtual ~AliTPCBuffer160();//destructor | |
34 | AliTPCBuffer160(const AliTPCBuffer160 &source); // copy constructor | |
35 | AliTPCBuffer160& operator=(const AliTPCBuffer160 &source); // ass. op. | |
36 | void FillBuffer(Int_t Val); | |
37 | //this method store a word into the buffer | |
38 | Int_t GetFreeCellNumber()const{return fFreeCellBuffer;} | |
39 | //this method return the number of free cells of the internal buffer | |
40 | Int_t GetNextBackWord(); | |
41 | //this method return the next word of 10 bit (reading the file backward) if it exists -1 otherwise | |
42 | Int_t GetNext(); | |
43 | //this method return the next word of 10 bit (reading the file forward) if it exists -1 otherwise | |
44 | void WriteTrailer(Int_t WordsNumber,Int_t PadNumber,Int_t RowNumber,Int_t SecNumber); | |
45 | //this method is used to write the trailer | |
46 | void ReadTrailer(Int_t &WordsNumber,Int_t &PadNumber,Int_t &RowNumber,Int_t &SecNumber); | |
47 | //this method is used to read the trailer when the file is read forward | |
48 | Int_t ReadTrailerBackward(Int_t &WordsNumber,Int_t &PadNumber,Int_t &RowNumber,Int_t &SecNumber); | |
49 | //this method is used to read the trailer when the file is read backward | |
50 | void WriteMiniHeader(UInt_t Size,Int_t SecNumber,Int_t SubSector,Int_t Detector,Int_t Flag ); | |
51 | //this method is used to write the Mini header | |
52 | void SetVerbose(Int_t val){fVerbose=val;} | |
53 | //this method is used to set the verbose level | |
54 | //level 0 no output messages | |
55 | //level !=0 some messages are displayed during the run | |
56 | void Flush(); | |
57 | //this method is used to fill the buffer with 2AA hexadecimal value and save it into the output file | |
58 | Int_t GetFillWordsNum()const{return fEndingFillWords;} | |
59 | private: | |
60 | void PackWord(UInt_t &BaseWord, UInt_t Word, Int_t StartBit, Int_t StopBit); | |
61 | //this method is used to pack bits into a word of 32 bits | |
62 | void UnpackWord(UInt_t PackedWord, Int_t StartBit, Int_t StopBit, UInt_t &Word); | |
63 | //this method is used to read a precise number of bits from a word of 32 bits | |
64 | UInt_t fBuffer[5]; //Buffer dimension is 32*5=160 bits and it contains 16 values | |
65 | //A value is never splitted in two Buffer | |
66 | ||
67 | ||
68 | Int_t fShift; //This variable contains the number of free bits in the current cell of | |
69 | //the Buffer after that the value Val is been inserted. | |
70 | //size of Int_t is 32 bit that is the same size of a cell of Buffer so | |
71 | //the shift operation are performed only on value Val. | |
72 | Int_t fCurrentCell; //This variable contains the cell number of the cell currently used | |
73 | Int_t fFreeCellBuffer;//number of free cells of the buffer | |
74 | Int_t fFlag; //0 read 1 write | |
75 | Int_t fVerbose; //verbose level | |
76 | fstream* f; //logical name of the I/O file | |
77 | Bool_t fCreated; //true if f was created by the buffer | |
78 | Int_t fMaskBackward; //bit mask for backward reading of a file | |
79 | UInt_t fFilePosition;//'pointer' to the actual position in the file | |
80 | UInt_t fFileEnd; //position of the last element of the file (File dimension) | |
81 | UInt_t fMiniHeaderPos;//Mini header position | |
82 | Int_t fEndingFillWords;//Few words at the end of the stream | |
83 | ClassDef(AliTPCBuffer160,1) | |
84 | }; | |
85 | ||
86 | #endif |