diff options
author | Lars Knoll <lars.knoll@nokia.com> | 2009-03-23 09:18:55 (GMT) |
---|---|---|
committer | Simon Hausmann <simon.hausmann@nokia.com> | 2009-03-23 09:18:55 (GMT) |
commit | e5fcad302d86d316390c6b0f62759a067313e8a9 (patch) | |
tree | c2afbf6f1066b6ce261f14341cf6d310e5595bc1 /src/xmlpatterns/functions/qdeepequalfn.cpp | |
download | Qt-e5fcad302d86d316390c6b0f62759a067313e8a9.zip Qt-e5fcad302d86d316390c6b0f62759a067313e8a9.tar.gz Qt-e5fcad302d86d316390c6b0f62759a067313e8a9.tar.bz2 |
Long live Qt 4.5!
Diffstat (limited to 'src/xmlpatterns/functions/qdeepequalfn.cpp')
-rw-r--r-- | src/xmlpatterns/functions/qdeepequalfn.cpp | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/xmlpatterns/functions/qdeepequalfn.cpp b/src/xmlpatterns/functions/qdeepequalfn.cpp new file mode 100644 index 0000000..133ab60 --- /dev/null +++ b/src/xmlpatterns/functions/qdeepequalfn.cpp @@ -0,0 +1,162 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtXmlPatterns module 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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qbuiltintypes_p.h" +#include "qcommonsequencetypes_p.h" +#include "qcommonvalues_p.h" +#include "qliteral_p.h" +#include "qschemanumeric_p.h" + +#include "qdeepequalfn_p.h" + +QT_BEGIN_NAMESPACE + +using namespace QPatternist; + +bool DeepEqualFN::evaluateEBV(const DynamicContext::Ptr &context) const +{ + const Item::Iterator::Ptr it1(m_operands.first()->evaluateSequence(context)); + const Item::Iterator::Ptr it2(m_operands.at(1)->evaluateSequence(context)); + + while(true) + { + const Item item1(it1->next()); + const Item item2(it2->next()); + + if(!item1) + { + if(item2) + return false; + else + return true; + } + else if(!item2) + { + if(item1) + return false; + else + return true; + } + else if(item1.isNode()) + { + if(item2.isNode()) + { + if(item1.asNode().isDeepEqual(item2.asNode())) + continue; + else + return false; + } + else + return false; + } + else if(item2.isNode()) + { + /* We know that item1 is not a node due to the check above. */ + return false; + } + else if(flexibleCompare(item1, item2, context)) + continue; + else if(BuiltinTypes::numeric->itemMatches(item1) && + item1.as<Numeric>()->isNaN() && + item2.as<Numeric>()->isNaN()) + { + // TODO + /* Handle the specific NaN circumstances. item2 isn't checked whether it's of + * type numeric, since the AtomicComparator lookup would have failed if both weren't + * numeric. */ + continue; + } + else + return false; + }; +} + +Expression::Ptr DeepEqualFN::typeCheck(const StaticContext::Ptr &context, + const SequenceType::Ptr &reqType) +{ + const Expression::Ptr me(FunctionCall::typeCheck(context, reqType)); + const ItemType::Ptr t1(m_operands.first()->staticType()->itemType()); + const ItemType::Ptr t2(m_operands.at(1)->staticType()->itemType()); + /* TODO This can be much more improved, and the optimizations should be moved + * to compress(). */ + + if(*CommonSequenceTypes::Empty == *t1) + { + if(*CommonSequenceTypes::Empty == *t2) + return wrapLiteral(CommonValues::BooleanTrue, context, this); + else + return me; + } + else if(*CommonSequenceTypes::Empty == *t2) + { + if(*CommonSequenceTypes::Empty == *t1) + return wrapLiteral(CommonValues::BooleanTrue, context, this); + else + return me; + } + else if(BuiltinTypes::node->xdtTypeMatches(t1) && + BuiltinTypes::node->xdtTypeMatches(t2)) + return me; /* We're comparing nodes. */ + else if(BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(t1) && + BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(t2)) + { + prepareComparison(fetchComparator(t1, t2, context)); + return me; + } + else + { + if ((BuiltinTypes::node->xdtTypeMatches(t1) && BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(t2)) + || (BuiltinTypes::node->xdtTypeMatches(t2) && BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(t1))) + { + /* One operand contains nodes and the other atomic values, or vice versa. They can never + * be identical. */ + // TODO warn? + return wrapLiteral(CommonValues::BooleanFalse, context, this); + } + else + { + // TODO Warn? + return me; + } + } +} + +QT_END_NAMESPACE |