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 "XPathValue.h"
33 #include "XPathExpressionNode.h"
34 #include "XPathUtil.h"
36 #include <wtf/MathExtras.h>
37 #include <wtf/StdLibExtras.h>
39 using std::numeric_limits;
44 const Value::AdoptTag Value::adopt = {};
46 const NodeSet& Value::toNodeSet() const
49 Expression::evaluationContext().hadTypeConversionError = true;
52 DEFINE_STATIC_LOCAL(NodeSet, emptyNodeSet, ());
56 return m_data->m_nodeSet;
59 NodeSet& Value::modifiableNodeSet()
62 Expression::evaluationContext().hadTypeConversionError = true;
65 m_data = ValueData::create();
67 m_type = NodeSetValue;
68 return m_data->m_nodeSet;
71 bool Value::toBoolean() const
75 return !m_data->m_nodeSet.isEmpty();
79 return m_number != 0 && !isnan(m_number);
81 return !m_data->m_string.isEmpty();
87 double Value::toNumber() const
91 return Value(toString()).toNumber();
95 const String& str = m_data->m_string.simplifyWhiteSpace();
97 // String::toDouble() supports exponential notation, which is not allowed in XPath.
98 unsigned len = str.length();
99 for (unsigned i = 0; i < len; ++i) {
101 if (!isASCIIDigit(c) && c != '.' && c != '-')
102 return numeric_limits<double>::quiet_NaN();
106 double value = str.toDouble(&canConvert);
109 return numeric_limits<double>::quiet_NaN();
114 ASSERT_NOT_REACHED();
118 String Value::toString() const
122 if (m_data->m_nodeSet.isEmpty())
124 return stringValue(m_data->m_nodeSet.firstNode());
126 return m_data->m_string;
133 return signbit(m_number) ? "-Infinity" : "Infinity";
134 return String::number(m_number);
136 return m_bool ? "true" : "false";
138 ASSERT_NOT_REACHED();
145 #endif // ENABLE(XPATH)