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18de460b | 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 | // This is the class which is to be used during the writing of | |
18 | // simulated raw data (DDL files format). | |
19 | // It is using the root functionality in order to deal correctly | |
20 | // with little/big endian issue. By convention the detector raw | |
21 | // data payload is stored always with little endian (this corresponds | |
22 | // to the real life situation when the detector data is coming from | |
23 | // the hardware). The implementation of this class is based on Root | |
24 | // tobuf() method defined in Bytes.h | |
25 | //------------------------------------------------------------------------- | |
26 | ||
27 | #include <unistd.h> | |
28 | #include <Riostream.h> | |
29 | ||
30 | #include "AliFstream.h" | |
31 | #include "AliLog.h" | |
32 | ||
33 | ClassImp(AliFstream) | |
34 | ||
35 | //______________________________________________________________________________ | |
36 | AliFstream::AliFstream(): | |
37 | fFile(0x0), | |
38 | fBuffer(0x0), | |
39 | fBufferSize(0), | |
40 | fSwap(kFALSE) | |
41 | { | |
42 | // Default constructor | |
43 | ||
44 | for (Int_t i = 0; i < 8; i++) fBuffer[i] = 0; | |
45 | } | |
46 | ||
47 | //______________________________________________________________________________ | |
48 | AliFstream::AliFstream(const char *fileName): | |
49 | fFile(0x0), | |
50 | fBuffer(0x0), | |
51 | fBufferSize(0), | |
52 | fSwap(kFALSE) | |
53 | { | |
54 | // Constructor | |
55 | // Takes the input filename and | |
56 | // opens the output stream | |
57 | ||
58 | #ifndef __DECCXX | |
59 | fFile = new fstream(fileName, ios::binary|ios::out); | |
60 | #else | |
61 | fFile = new fstream(fileName, ios::out); | |
62 | #endif | |
63 | ||
64 | // Check endianess | |
65 | UInt_t temp = 1; | |
66 | UChar_t *ptemp = (UChar_t *)&temp; | |
67 | if (!ptemp[0]) fSwap = kTRUE; | |
68 | } | |
69 | ||
70 | //______________________________________________________________________________ | |
71 | AliFstream::AliFstream(const AliFstream &source): | |
72 | TObject(source) | |
73 | { | |
74 | // Copy constructor | |
75 | // | |
76 | AliFatal("Copy constructor not implemented !"); | |
77 | } | |
78 | ||
79 | //______________________________________________________________________________ | |
80 | AliFstream &AliFstream::operator =(const AliFstream& source) | |
81 | { | |
82 | // assignment operator | |
83 | // | |
84 | if(this==&source) return *this; | |
85 | ((TObject *)this)->operator=(source); | |
86 | ||
87 | AliFatal("Assigment operator not implemented !"); | |
88 | ||
89 | return *this; | |
90 | } | |
91 | ||
92 | //______________________________________________________________________________ | |
93 | AliFstream::~AliFstream() | |
94 | { | |
95 | // Destructor | |
96 | // | |
97 | if (fFile) { | |
98 | fFile->close(); | |
99 | delete fFile; | |
100 | } | |
101 | if (fBuffer) delete [] fBuffer; | |
102 | } | |
103 | ||
104 | //______________________________________________________________________________ | |
41008432 | 105 | void AliFstream::Seekp(UInt_t position) |
18de460b | 106 | { |
107 | // Go to a given position | |
108 | // inside the output stream | |
41008432 | 109 | if (fFile) fFile->seekp(position); |
18de460b | 110 | } |
111 | ||
112 | //______________________________________________________________________________ | |
41008432 | 113 | UInt_t AliFstream::Tellp() |
18de460b | 114 | { |
115 | // Return the current | |
116 | // position inside the | |
117 | // output stream | |
41008432 | 118 | if (fFile) return fFile->tellp(); |
18de460b | 119 | else return 0; |
120 | } | |
121 | ||
122 | //______________________________________________________________________________ | |
123 | void AliFstream::WriteBuffer(const char *buffer, UInt_t size, Bool_t force) | |
124 | { | |
125 | // Write the buffer to a file | |
126 | // In case the user gives a 'force' | |
127 | // flag then the buffer is written | |
128 | // as it is. Otherwise, we check the | |
129 | // endianess and swap the buffer data | |
130 | // so that it is always stored using | |
131 | // little endian format. | |
41008432 | 132 | |
133 | // The raw data payload size is always | |
134 | // 4 bytes aligned | |
135 | if ((size % 4) != 0) | |
136 | AliFatal(Form("Size of the buffer is not multiple of 4 (size = %d) !",size)); | |
137 | ||
18de460b | 138 | if (force) { |
139 | fFile->write(buffer,size); | |
140 | } | |
141 | else { | |
142 | if (!fSwap) { | |
143 | // Little endian - do nothing | |
144 | fFile->write(buffer,size); | |
145 | } | |
146 | else { | |
147 | // Big endian - swap the buffer contents | |
148 | if (size > fBufferSize) { | |
149 | if (fBuffer) delete [] fBuffer; | |
150 | fBuffer = new UChar_t[size]; | |
151 | fBufferSize = size; | |
152 | } | |
153 | swab(buffer,fBuffer,size); | |
154 | fFile->write((const char *)fBuffer,size); | |
155 | } | |
156 | } | |
157 | } |