source: trunk/src/xmlpatterns/functions/qcomparingaggregator.cpp@ 966

Last change on this file since 966 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 8.1 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the QtXmlPatterns module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42/**
43 * @file qcomparingaggregator.cpp
44 * @short This file is included by qcomparingaggregator_p.h.
45 * If you need includes in this file, put them in qcomparingaggregator_p.h, outside of the namespace.
46 */
47
48template <AtomicComparator::Operator oper, AtomicComparator::ComparisonResult result>
49inline Item
50ComparingAggregator<oper, result>::applyNumericPromotion(const Item &old,
51 const Item &nev,
52 const Item &newVal) const
53{
54 Q_ASSERT(old);
55 Q_ASSERT(nev);
56 Q_ASSERT(newVal);
57 const ItemType::Ptr to(old.type());
58 const ItemType::Ptr tn(nev.type());
59
60 if(!(BuiltinTypes::numeric->xdtTypeMatches(to) && BuiltinTypes::numeric->xdtTypeMatches(tn)))
61 return newVal; /* At least one of them isn't numeric. */
62 else if(BuiltinTypes::xsDouble->xdtTypeMatches(to) || BuiltinTypes::xsDouble->xdtTypeMatches(tn))
63 return toItem(Double::fromValue(newVal.as<Numeric>()->toDouble()));
64 else if(BuiltinTypes::xsFloat->xdtTypeMatches(to) || BuiltinTypes::xsFloat->xdtTypeMatches(tn))
65 return toItem(Float::fromValue(newVal.as<Numeric>()->toDouble()));
66 else if(BuiltinTypes::xsInteger->xdtTypeMatches(to) &&
67 BuiltinTypes::xsInteger->xdtTypeMatches(tn))
68 return newVal; /* Both must be xs:integer. */
69 else
70 return toItem(Decimal::fromValue(newVal.as<Numeric>()->toDecimal()));
71}
72
73template <AtomicComparator::Operator oper, AtomicComparator::ComparisonResult result>
74Item
75ComparingAggregator<oper, result>::evaluateSingleton(const DynamicContext::Ptr &context) const
76{
77 const Item::Iterator::Ptr it(m_operands.first()->evaluateSequence(context));
78 Item largest;
79
80 while(true)
81 {
82 Item next(it->next());
83
84 if(!next)
85 {
86 return largest;
87 }
88
89 AtomicComparator::Ptr comp(comparator());
90
91 if(!comp)
92 {
93 ItemType::Ptr t1(next.type());
94 Q_ASSERT(t1);
95
96 if(BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(t1))
97 {
98 next = cast(next, context);
99 t1 = BuiltinTypes::xsDouble;
100 }
101
102 if(!largest)
103 {
104 largest = next;
105 continue;
106 }
107
108 Q_ASSERT(largest);
109 comp = fetchComparator(largest.type(), t1, context);
110 Q_ASSERT(comp);
111 }
112 else if(!largest)
113 {
114 largest = next;