2 * Copyright 2005 Frerich Raabe <raabe@kde.org>
3 * Copyright (C) 2006 Apple Computer, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include "core/xml/XPathValue.h"
30 #include "core/xml/XPathExpressionNode.h"
31 #include "core/xml/XPathUtil.h"
32 #include "wtf/MathExtras.h"
33 #include "wtf/StdLibExtras.h"
39 const Value::AdoptTag
Value::adopt
= { };
41 DEFINE_TRACE(ValueData
)
43 visitor
->trace(m_nodeSet
);
48 visitor
->trace(m_data
);
51 const NodeSet
& Value::toNodeSet(EvaluationContext
* context
) const
53 if (!isNodeSet() && context
)
54 context
->hadTypeConversionError
= true;
57 DEFINE_STATIC_LOCAL(Persistent
<NodeSet
>, emptyNodeSet
, (NodeSet::create()));
61 return m_data
->nodeSet();
64 NodeSet
& Value::modifiableNodeSet(EvaluationContext
& context
)
67 context
.hadTypeConversionError
= true;
70 m_data
= ValueData::create();
72 m_type
= NodeSetValue
;
73 return m_data
->nodeSet();
76 bool Value::toBoolean() const
80 return !m_data
->nodeSet().isEmpty();
84 return m_number
&& !std::isnan(m_number
);
86 return !m_data
->m_string
.isEmpty();
92 double Value::toNumber() const
96 return Value(toString()).toNumber();
100 const String
& str
= m_data
->m_string
.simplifyWhiteSpace();
102 // String::toDouble() supports exponential notation, which is not
104 unsigned len
= str
.length();
105 for (unsigned i
= 0; i
< len
; ++i
) {
107 if (!isASCIIDigit(c
) && c
!= '.' && c
!= '-')
108 return std::numeric_limits
<double>::quiet_NaN();
112 double value
= str
.toDouble(&canConvert
);
115 return std::numeric_limits
<double>::quiet_NaN();
120 ASSERT_NOT_REACHED();
124 String
Value::toString() const
128 if (m_data
->nodeSet().isEmpty())
130 return stringValue(m_data
->nodeSet().firstNode());
132 return m_data
->m_string
;
134 if (std::isnan(m_number
))
138 if (std::isinf(m_number
))
139 return std::signbit(m_number
) ? "-Infinity" : "Infinity";
140 return String::number(m_number
);
142 return m_bool
? "true" : "false";
144 ASSERT_NOT_REACHED();