1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* INTEL CONFIDENTIAL
* Copyright © 2011 Intel
* Corporation All Rights Reserved.
*
* The source code contained or described herein and all documents related to
* the source code ("Material") are owned by Intel Corporation or its suppliers
* or licensors. Title to the Material remains with Intel Corporation or its
* suppliers and licensors. The Material contains trade secrets and proprietary
* and confidential information of Intel or its suppliers and licensors. The
* Material is protected by worldwide copyright and trade secret laws and
* treaty provisions. No part of the Material may be used, copied, reproduced,
* modified, published, uploaded, posted, transmitted, distributed, or
* disclosed in any way without Intel’s prior express written permission.
*
* No license under any patent, copyright, trade secret or other intellectual
* property right is granted to or conferred upon you by disclosure or delivery
* of the Materials, either expressly, by implication, inducement, estoppel or
* otherwise. Any license under such intellectual property rights must be
* express and approved by Intel in writing.
*
* CREATED: 2011-06-01
* UPDATED: 2011-07-27
*/
#include "BinaryStream.h"
#include <string.h>
#include <assert.h>
using namespace std;
CBinaryStream::CBinaryStream(const string& strFileName, bool bOut, uint32_t uiDataSize, uint8_t uiStructureChecksum) :
_strFileName(strFileName),
_bOut(bOut),
_uiDataSize(uiDataSize),
_uiStructureChecksum(uiStructureChecksum),
_puiData(new uint8_t[uiDataSize]),
_uiPos(0),
_bOpen(false)
{
}
CBinaryStream::~CBinaryStream()
{
delete [] _puiData;
if (_bOpen) {
close();
}
}
bool CBinaryStream::open(string& strError)
{
assert(!_bOpen);
_fileStream.open(_strFileName.c_str(), (_bOut ? ios::out : ios::in|ios::ate)|ios::binary);
if (!_fileStream.is_open() || !_fileStream.good()) {
strError = string("Failed to ") + (_bOut ? "write" : "read") + "-open";
return false;
}
if (!_bOut) {
// Get file size
ifstream::pos_type uiFileSize = _fileStream.tellg();
// Validate file size
if (_uiDataSize + sizeof(_uiStructureChecksum) != (uint32_t)uiFileSize) {
// Size different from expected
strError = "Unexpected file size";
return false;
}
// Back to beginning of file
_fileStream.seekg(0, ios::beg);
// Get data
_fileStream.read((char*)_puiData, _uiDataSize);
// File checksum
uint8_t uiFileChecksum;
_fileStream.read((char*)&uiFileChecksum, sizeof(uiFileChecksum));
// Data checksum
uint8_t uiDataChecksum = computeChecksum();
// Validate checksum
if (uiDataChecksum != uiFileChecksum) {
strError = "Integrity checks failed";
return false;
}
}
// Keep track
_bOpen = true;
return true;
}
void CBinaryStream::close()
{
assert(_bOpen);
if (_bOut) {
// Get data
_fileStream.write((const char*)_puiData, _uiDataSize);
// Compute checksum
uint8_t uiDataChecksum = computeChecksum();
// Write checksum
_fileStream.write((const char*)&uiDataChecksum, sizeof(uiDataChecksum));
}
// Keep track
_bOpen = false;
// Close file
_fileStream.close();
}
void CBinaryStream::reset()
{
_uiPos = 0;
}
void CBinaryStream::write(const uint8_t* puiData, uint32_t uiSize)
{
assert(_uiPos + uiSize <= _uiDataSize);
memcpy(&_puiData[_uiPos], puiData, uiSize);
_uiPos += uiSize;
}
void CBinaryStream::read(uint8_t* puiData, uint32_t uiSize)
{
assert(_uiPos + uiSize <= _uiDataSize);
memcpy(puiData, &_puiData[_uiPos], uiSize);
_uiPos += uiSize;
}
uint8_t CBinaryStream::computeChecksum() const
{
uint32_t uiIndex;
uint8_t uiDataChecksum = _uiStructureChecksum;
for (uiIndex = 0; uiIndex < _uiDataSize; uiIndex++) {
uiDataChecksum += _puiData[uiIndex];
}
return uiDataChecksum;
}
bool CBinaryStream::isOut() const
{
return _bOut;
}
|
