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
|
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* XSEC
*
* XSECCanon := Base (virtual) class for canonicalisation objects
*
* Author(s): Berin Lautenbach
*
* $ID$
*
* $LOG$
*
*/
#include <xsec/canon/XSECCanon.hpp>
#include "../utils/XSECDOMUtils.hpp"
#include <memory.h>
XERCES_CPP_NAMESPACE_USE
// --------------------------------------------------------------------------------
// XSECCanon Virtual Class implementation
// --------------------------------------------------------------------------------
// Constructors
XSECCanon::XSECCanon() {};
XSECCanon::XSECCanon(DOMDocument *newDoc) : m_buffer() {
mp_doc = newDoc;
mp_startNode = mp_nextNode = newDoc; // By default, start from startNode
m_bufferLength = m_bufferPoint = 0; // Start with an empty buffer
m_allNodesDone = false;
};
XSECCanon::XSECCanon(DOMDocument *newDoc, DOMNode *newStartNode) {
mp_doc = newDoc;
mp_startNode = mp_nextNode = newStartNode;
m_bufferLength = m_bufferPoint = 0; // Start with an empty buffer
m_allNodesDone = false;
};
// Destructors
XSECCanon::~XSECCanon() {};
// Public Methods
XMLSize_t XSECCanon::outputBuffer(unsigned char *outBuffer, XMLSize_t numBytes) {
// numBytes of data are required to be placed in outBuffer.
// Calculate amount left in buffer
XMLSize_t remaining = m_bufferLength - m_bufferPoint;
XMLSize_t bytesToGo = numBytes;
XMLSize_t i = 0; // current point in outBuffer
// While we don't have enough, and have not completed -
while (!m_allNodesDone && (remaining < bytesToGo)) {
// Copy what we have and get some more in the buffer
memcpy(&outBuffer[i], &m_buffer[m_bufferPoint], remaining);
i += remaining;
m_bufferPoint += remaining;
bytesToGo -= remaining;
// Get more
processNextNode();
remaining = m_bufferLength - m_bufferPoint; // This will be reset by processNextElement
// "-bufferPoint" is just in case.
}
if (m_allNodesDone && (remaining < bytesToGo)) {
// Was not enough data to fill everything up
memcpy (&outBuffer[i], &m_buffer[m_bufferPoint], remaining);
m_bufferPoint += remaining;
return i + remaining;
}
// Copy the tail of the buffer
memcpy(&outBuffer[i], &m_buffer[m_bufferPoint], bytesToGo);
m_bufferPoint += bytesToGo;
return (bytesToGo + i);
}
// setStartNode sets the starting point for the output if it is a sub-document
// that needs canonicalisation and we want to re-start
bool XSECCanon::setStartNode(DOMNode *newStartNode) {
mp_startNode = newStartNode;
m_bufferPoint = 0;
m_bufferLength = 0;
mp_nextNode = mp_startNode;
m_allNodesDone = false; // Restart
return true; // Should check to ensure that the StartNode is part of the doc.
}
|
