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
187
188
189
190
191
192
193
194
195
196
197
|
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
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;
Q_ASSERT_X(firstDocument, Q_FUNC_INFO,
"A valid QIODevice pointer must be supplied");
Q_ASSERT_X(secondDocument, Q_FUNC_INFO,
"A valid QIODevice pointer must be supplied");
Q_ASSERT_X(firstDocument->isReadable(), Q_FUNC_INFO, "The device must be readable.");
Q_ASSERT_X(secondDocument->isReadable(), Q_FUNC_INFO, "The device must be readable.");
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();
}
}
Q_ASSERT_X(false, Q_FUNC_INFO, "This line should never be reached");
return false;
}
|
