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Diffstat (limited to 'src/xmlpatterns/expr/qcalltargetdescription.cpp')
| -rw-r--r-- | src/xmlpatterns/expr/qcalltargetdescription.cpp | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qcalltargetdescription.cpp b/src/xmlpatterns/expr/qcalltargetdescription.cpp new file mode 100644 index 0000000000..8c8bfdf394 --- /dev/null +++ b/src/xmlpatterns/expr/qcalltargetdescription.cpp @@ -0,0 +1,107 @@ +/**************************************************************************** +** +** 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 "qcallsite_p.h" + +#include "qcalltargetdescription_p.h" + +QT_BEGIN_NAMESPACE + +using namespace QPatternist; + +CallTargetDescription::CallTargetDescription(const QXmlName &name) : m_name(name) +{ + Q_ASSERT(!m_name.isNull()); +} + +QXmlName CallTargetDescription::name() const +{ + return m_name; +} + +void CallTargetDescription::checkArgumentsCircularity(CallTargetDescription::List &signList, + const Expression::Ptr callsite) +{ + /* Check the arguments. */ + const Expression::List ops(callsite->operands()); + const Expression::List::const_iterator end(ops.constEnd()); + Expression::List::const_iterator it(ops.constBegin()); + + for(; it != end; ++it) + checkCallsiteCircularity(signList, *it); +} + +void CallTargetDescription::checkCallsiteCircularity(CallTargetDescription::List &signList, + const Expression::Ptr expr) +{ + Q_ASSERT(expr); + + if(expr->is(Expression::IDUserFunctionCallsite)) + { + CallTargetDescription::List::const_iterator it(signList.constBegin()); + const CallTargetDescription::List::const_iterator end(signList.constEnd()); + CallSite *const callsite = static_cast<CallSite *>(expr.data()); + + for(; it != end; ++it) + { + if(callsite->configureRecursion(*it)) + { + /* A callsite inside the function body to the function. This user function + * is recursive if it's to the same function, in other words. Which it was + * if configureRecursion() returned true. */ + + /* Now we continue and check the arguments of the callsite. That is, the arguments. + * This catches for instance local:foo(local:foo(3)). */ + checkArgumentsCircularity(signList, expr); + return; + } + } + /* Check the body of the function so this callsite isn't "indirectly" a + * recursive call to the function we're checking. XQTS test case + * default_namespace-011 is an example of this. */ + signList.append(callsite->callTargetDescription()); + checkCallsiteCircularity(signList, callsite->body()); + } + + checkArgumentsCircularity(signList, expr); /* We're done in this case. */ +} + +QT_END_NAMESPACE |