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
|
/*
* Copyright 2005 Frerich Raabe <raabe@kde.org>
* Copyright (C) 2006 Apple Computer, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "XPathValue.h"
#if ENABLE(XPATH)
#include "Node.h"
#include "XPathExpressionNode.h"
#include "XPathUtil.h"
#include <limits>
#include <wtf/MathExtras.h>
#include <wtf/StdLibExtras.h>
using std::numeric_limits;
namespace WebCore {
namespace XPath {
const Value::AdoptTag Value::adopt = {};
const NodeSet& Value::toNodeSet() const
{
if (!isNodeSet())
Expression::evaluationContext().hadTypeConversionError = true;
if (!m_data) {
DEFINE_STATIC_LOCAL(NodeSet, emptyNodeSet, ());
return emptyNodeSet;
}
return m_data->m_nodeSet;
}
NodeSet& Value::modifiableNodeSet()
{
if (!isNodeSet())
Expression::evaluationContext().hadTypeConversionError = true;
if (!m_data)
m_data = ValueData::create();
m_type = NodeSetValue;
return m_data->m_nodeSet;
}
bool Value::toBoolean() const
{
switch (m_type) {
case NodeSetValue:
return !m_data->m_nodeSet.isEmpty();
case BooleanValue:
return m_bool;
case NumberValue:
return m_number != 0 && !isnan(m_number);
case StringValue:
return !m_data->m_string.isEmpty();
}
ASSERT_NOT_REACHED();
return false;
}
double Value::toNumber() const
{
switch (m_type) {
case NodeSetValue:
return Value(toString()).toNumber();
case NumberValue:
return m_number;
case StringValue: {
const String& str = m_data->m_string.simplifyWhiteSpace();
// String::toDouble() supports exponential notation, which is not allowed in XPath.
unsigned len = str.length();
for (unsigned i = 0; i < len; ++i) {
UChar c = str[i];
if (!isASCIIDigit(c) && c != '.' && c != '-')
return numeric_limits<double>::quiet_NaN();
}
bool canConvert;
double value = str.toDouble(&canConvert);
if (canConvert)
return value;
return numeric_limits<double>::quiet_NaN();
}
case BooleanValue:
return m_bool;
}
ASSERT_NOT_REACHED();
return 0.0;
}
String Value::toString() const
{
switch (m_type) {
case NodeSetValue:
if (m_data->m_nodeSet.isEmpty())
return "";
return stringValue(m_data->m_nodeSet.firstNode());
case StringValue:
return m_data->m_string;
case NumberValue:
if (isnan(m_number))
return "NaN";
if (m_number == 0)
return "0";
if (isinf(m_number))
return signbit(m_number) ? "-Infinity" : "Infinity";
return String::number(m_number);
case BooleanValue:
return m_bool ? "true" : "false";
}
ASSERT_NOT_REACHED();
return String();
}
}
}
#endif // ENABLE(XPATH)
|
