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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
QT_FORWARD_DECLARE_CLASS(QIODevice)
QT_FORWARD_DECLARE_CLASS(QString)
#include <QtCore/QFlags>
class QC14N
{
public:
static bool isEqual(QIODevice *const firstDocument,
QIODevice *const secondDocument,
QString *const message = 0);
private:
static bool isDifferent(const QXmlStreamReader &r1,
const QXmlStreamReader &r2,
QString *const message);
static bool isAttributesEqual(const QXmlStreamReader &r1,
const QXmlStreamReader &r2,
QString *const message);
};
#include <QXmlStreamReader>
/*! \internal
\a firstDocument and \a secondDocument must be pointers to opened devices.
*/
bool QC14N::isEqual(QIODevice *const firstDocument,
QIODevice *const secondDocument,
QString *const message)
{
qDebug() << Q_FUNC_INFO;
if (!firstDocument)
qFatal("%s: A valid firstDocument QIODevice pointer must be supplied", Q_FUNC_INFO);
if (!secondDocument)
qFatal("%s: A valid secondDocument QIODevice pointer must be supplied", Q_FUNC_INFO);
if (!firstDocument->isReadable())
qFatal("%s: The firstDocument device must be readable.", Q_FUNC_INFO);
if (!secondDocument->isReadable())
qFatal("%s: The secondDocument device must be readable.", Q_FUNC_INFO);
QXmlStreamReader r1(firstDocument);
QXmlStreamReader r2(secondDocument);
while(!r1.atEnd())
{
if(r1.error())
{
if(message)
*message = r1.errorString();
return false;
}
else if(r2.error())
{
if(message)
*message = r1.errorString();
return false;
}
else
{
if(isDifferent(r1, r2, message))
return true;
}
r1.readNext();
r2.readNext();
}
if(!r2.atEnd())
{
if(message)
*message = QLatin1String("Reached the end of the first document, while there was still content left in the second");
return false;
}
/* And they lived happily ever after. */
return true;
}
/*! \internal
*/
bool QC14N::isAttributesEqual(const QXmlStreamReader &r1,
const QXmlStreamReader &r2,
QString *const message)
{
Q_UNUSED(message);
const QXmlStreamAttributes &attrs1 = r1.attributes();
const QXmlStreamAttributes &attrs2 = r2.attributes();
const int len = attrs1.size();
if(len != attrs2.size())
return false;
for(int i = 0; i < len; ++i)
{
if(!attrs2.contains(attrs1.at(i)))
return false;
}
return true;
}
bool QC14N::isDifferent(const QXmlStreamReader &r1,
const QXmlStreamReader &r2,
QString *const message)
{
// TODO error reporting can be a lot better here.
if(r1.tokenType() != r2.tokenType())
return false;
switch(r1.tokenType())
{
case QXmlStreamReader::NoToken:
/* Fallthrough. */
case QXmlStreamReader::StartDocument:
/* Fallthrough. */
case QXmlStreamReader::EndDocument:
/* Fallthrough. */
case QXmlStreamReader::DTD:
return true;
case QXmlStreamReader::Invalid:
return false;
case QXmlStreamReader::StartElement:
{
return r1.qualifiedName() == r2.qualifiedName()
/* Yes, the namespace test below should be redundant, but with it we
* trap namespace bugs in QXmlStreamReader, if any. */
&& r1.namespaceUri() == r2.namespaceUri()
&& isAttributesEqual(r1, r2, message);
}
case QXmlStreamReader::EndElement:
{
return r1.qualifiedName() == r2.qualifiedName()
&& r1.namespaceUri() == r2.namespaceUri()
&& r1.name() == r2.name();
}
case QXmlStreamReader::Characters:
/* Fallthrough. */
case QXmlStreamReader::Comment:
return r1.text() == r2.text();
case QXmlStreamReader::EntityReference:
case QXmlStreamReader::ProcessingInstruction:
{
return r1.processingInstructionTarget() == r2.processingInstructionTarget() &&
r2.processingInstructionData() == r2.processingInstructionData();
}
default:
qFatal("%s: Unknown tokenType: %d", Q_FUNC_INFO, static_cast<int>(r1.tokenType()));
return false;
}
}
|
