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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 316 insertions, 0 deletions

diff --git a/src/xmlpatterns/functions/qaggregatefns.cpp b/src/xmlpatterns/functions/qaggregatefns.cpp
new file mode 100644
index 0000000..1eae34f
--- /dev/null
+++ b/src/xmlpatterns/functions/qaggregatefns.cpp
@@ -0,0 +1,316 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qabstractfloat_p.h"
+#include "qarithmeticexpression_p.h"
+#include "qbuiltintypes_p.h"
+#include "qcommonsequencetypes_p.h"
+#include "qcommonvalues_p.h"
+#include "qdecimal_p.h"
+#include "qgenericsequencetype_p.h"
+#include "qinteger_p.h"
+#include "qoptimizerblocks_p.h"
+#include "qsequencefns_p.h"
+#include "quntypedatomicconverter_p.h"
+
+#include "qaggregatefns_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+Item CountFN::evaluateSingleton(const DynamicContext::Ptr &context) const
+{
+    return Integer::fromValue(m_operands.first()->evaluateSequence(context)->count());
+}
+
+Expression::Ptr CountFN::typeCheck(const StaticContext::Ptr &context,
+                                   const SequenceType::Ptr &reqType)
+{
+    if(*CommonSequenceTypes::EBV->itemType() == *reqType->itemType())
+    {
+        return ByIDCreator::create(IDExistsFN, operands(), context, this)->typeCheck(context, reqType);
+    }
+    else
+        return FunctionCall::typeCheck(context, reqType);
+}
+
+Expression::Ptr CountFN::compress(const StaticContext::Ptr &context)
+{
+    const Expression::Ptr me(FunctionCall::compress(context));
+    if(me != this)
+        return me;
+
+    const Cardinality card(m_operands.first()->staticType()->cardinality());
+    if(card.isExactlyOne())
+        return wrapLiteral(CommonValues::IntegerOne, context, this);
+    else if(card.isEmpty())
+    {
+        /* One might think that if the operand is (), that compress() would have
+         * evaluated us and therefore this line never be reached, but "()" can
+         * be combined with the DisableElimination flag. */
+        return wrapLiteral(CommonValues::IntegerZero, context, this);
+    }
+    else if(card.isExact())
+        return wrapLiteral(Integer::fromValue(card.minimum()), context, this);
+    else
+        return me;
+}
+
+Expression::Ptr AddingAggregate::typeCheck(const StaticContext::Ptr &context,
+                                           const SequenceType::Ptr &reqType)
+{
+    const Expression::Ptr me(FunctionCall::typeCheck(context, reqType));
+    ItemType::Ptr t1(m_operands.first()->staticType()->itemType());
+
+    if(*CommonSequenceTypes::Empty == *t1)
+        return me;
+    else if(*BuiltinTypes::xsAnyAtomicType == *t1 ||
+            *BuiltinTypes::numeric == *t1)
+        return me;
+    else if(BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(t1))
+    {
+        m_operands.replace(0, Expression::Ptr(new UntypedAtomicConverter(m_operands.first(),
+                                                                         BuiltinTypes::xsDouble)));
+        t1 = m_operands.first()->staticType()->itemType();
+    }
+    else if(!BuiltinTypes::numeric->xdtTypeMatches(t1) &&
+            !BuiltinTypes::xsDayTimeDuration->xdtTypeMatches(t1) &&
+            !BuiltinTypes::xsYearMonthDuration->xdtTypeMatches(t1))
+    {
+        /* Translator, don't translate the type names. */
+        context->error(QtXmlPatterns::tr("The first argument to %1 cannot be "
+                                         "of type %2. It must be a numeric "
+                                         "type, xs:yearMonthDuration or "
+                                         "xs:dayTimeDuration.")
+                       .arg(formatFunction(context->namePool(), signature()))
+                       .arg(formatType(context->namePool(),
+                                       m_operands.first()->staticType())),
+                       ReportContext::FORG0006, this);
+    }
+
+    if(!m_operands.first()->staticType()->cardinality().allowsMany())
+        return m_operands.first();
+
+    /* We know fetchMathematician won't attempt a rewrite of the operand, so this is safe. */
+    m_mather = ArithmeticExpression::fetchMathematician(m_operands.first(), m_operands.first(),
+                                                        AtomicMathematician::Add, true, context,
+                                                        this,
+                                                        ReportContext::FORG0006);
+    return me;
+}
+
+Item AvgFN::evaluateSingleton(const DynamicContext::Ptr &context) const
+{
+    const Item::Iterator::Ptr it(m_operands.first()->evaluateSequence(context));
+    Item sum(it->next());
+
+    xsInteger count = 0;
+    while(sum)
+    {
+        ++count;
+        const Item next(it->next());
+        if(!next)
+            break;
+
+        sum = ArithmeticExpression::flexiblyCalculate(sum, AtomicMathematician::Add,
+                                                      next, m_adder, context,
+                                                      this,
+                                                      ReportContext::FORG0006);
+    };
+
+    if(!sum)
+        return Item();
+
+    /* Note that we use the same m_mather which was used for adding,
+     * can be worth to think about. */
+    return ArithmeticExpression::flexiblyCalculate(sum, AtomicMathematician::Div,
+                                                   Integer::fromValue(count),
+                                                   m_divider, context,
+                                                   this,
+                                                   ReportContext::FORG0006);
+}
+
+Expression::Ptr AvgFN::typeCheck(const StaticContext::Ptr &context,
+                                 const SequenceType::Ptr &reqType)
+{
+    const Expression::Ptr me(FunctionCall::typeCheck(context, reqType));
+    ItemType::Ptr t1(m_operands.first()->staticType()->itemType());
+
+    if(*CommonSequenceTypes::Empty == *t1)
+        return me;
+    else if(*BuiltinTypes::xsAnyAtomicType == *t1 ||
+            *BuiltinTypes::numeric == *t1)
+        return me;
+    else if(BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(t1))
+    {
+        m_operands.replace(0, Expression::Ptr(new UntypedAtomicConverter(m_operands.first(),
+                                                                         BuiltinTypes::xsDouble)));
+        t1 = m_operands.first()->staticType()->itemType();
+    }
+    else if(!BuiltinTypes::numeric->xdtTypeMatches(t1) &&
+            !BuiltinTypes::xsDayTimeDuration->xdtTypeMatches(t1) &&
+            !BuiltinTypes::xsYearMonthDuration->xdtTypeMatches(t1))
+    {
+        /* Translator, don't translate the type names. */
+        context->error(QtXmlPatterns::tr("The first argument to %1 cannot be "
+                                         "of type %2. It must be of type %3, "
+                                         "%4, or %5.")
+                          .arg(signature())
+                          .arg(formatType(context->namePool(), m_operands.first()->staticType()))
+                          .arg(formatType(context->namePool(), BuiltinTypes::numeric))
+                          .arg(formatType(context->namePool(), BuiltinTypes::xsYearMonthDuration))
+                          .arg(formatType(context->namePool(), BuiltinTypes::xsDayTimeDuration)),
+                       ReportContext::FORG0006, this);
+    }
+
+    if(!m_operands.first()->staticType()->cardinality().allowsMany())
+        return m_operands.first();
+
+    /* We use CommonValues::IntegerOne here because it is an arbitrary Expression
+     * of type xs:integer */
+    Expression::Ptr op2(wrapLiteral(CommonValues::IntegerOne, context, this));
+    m_adder = ArithmeticExpression::fetchMathematician(m_operands.first(), m_operands.first(),
+                                                       AtomicMathematician::Add, true, context, this);
+    m_divider = ArithmeticExpression::fetchMathematician(m_operands.first(), op2,
+                                                         AtomicMathematician::Div, true, context, this);
+    return me;
+}
+
+SequenceType::Ptr AvgFN::staticType() const
+{
+    const SequenceType::Ptr opt(m_operands.first()->staticType());
+    ItemType::Ptr t(opt->itemType());
+
+    if(BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(t))
+        t = BuiltinTypes::xsDouble; /* xsUntypedAtomics are converted to xsDouble. */
+    else if(BuiltinTypes::xsInteger->xdtTypeMatches(t))
+        t = BuiltinTypes::xsDecimal;
+
+    /* else, it means the type is xsDayTimeDuration, xsYearMonthDuration,
+     * xsDouble, xsFloat or xsAnyAtomicType, which we use as is. */
+    return makeGenericSequenceType(BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(t) ? t : ItemType::Ptr(BuiltinTypes::xsAnyAtomicType),
+                                   opt->cardinality().toWithoutMany());
+}
+
+Item SumFN::evaluateSingleton(const DynamicContext::Ptr &context) const
+{
+    const Item::Iterator::Ptr it(m_operands.first()->evaluateSequence(context));
+    Item sum(it->next());
+
+    while(sum)
+    {
+        const Item next(it->next());
+        if(!next)
+            break;
+
+        sum = ArithmeticExpression::flexiblyCalculate(sum, AtomicMathematician::Add,
+                                                      next, m_mather, context, this,
+                                                      ReportContext::FORG0006);
+    };
+
+    if(!sum)
+    {
+        if(m_operands.count() == 1)
+            return CommonValues::IntegerZero;
+        else
+            return m_operands.last()->evaluateSingleton(context);
+    }
+
+    return sum;
+}
+
+Expression::Ptr SumFN::typeCheck(const StaticContext::Ptr &context,
+                                 const SequenceType::Ptr &reqType)
+{
+    const Expression::Ptr me(AddingAggregate::typeCheck(context, reqType));
+
+    if(*CommonSequenceTypes::Empty == *m_operands.first()->staticType()->itemType())
+    {
+        if(m_operands.count() == 1)
+            return wrapLiteral(CommonValues::IntegerZero, context, this);
+        else
+            return m_operands.at(1);
+    }
+
+    if(m_operands.count() == 1)
+        return me;
+
+    const ItemType::Ptr t(m_operands.at(1)->staticType()->itemType());
+
+    if(!BuiltinTypes::numeric->xdtTypeMatches(t) &&
+       !BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(t) &&
+       *CommonSequenceTypes::Empty != *t &&
+       !BuiltinTypes::xsDayTimeDuration->xdtTypeMatches(t) &&
+       !BuiltinTypes::xsYearMonthDuration->xdtTypeMatches(t))
+    {
+        context->error(QtXmlPatterns::tr("The second argument to %1 cannot be "
+                                         "of type %2. It must be of type %3, "
+                                         "%4, or %5.")
+                          .arg(formatFunction(context->namePool(), signature()))
+                          .arg(formatType(context->namePool(), m_operands.at(1)->staticType()))
+                          .arg(formatType(context->namePool(), BuiltinTypes::numeric))
+                          .arg(formatType(context->namePool(), BuiltinTypes::xsYearMonthDuration))
+                          .arg(formatType(context->namePool(), BuiltinTypes::xsDayTimeDuration)),
+                       ReportContext::FORG0006, this);
+        return me;
+    }
+
+    return me;
+}
+
+SequenceType::Ptr SumFN::staticType() const
+{
+    const SequenceType::Ptr t(m_operands.first()->staticType());
+
+    if(m_operands.count() == 1)
+    {
+        return makeGenericSequenceType(t->itemType() | BuiltinTypes::xsInteger,
+                                       Cardinality::exactlyOne());
+    }
+    else
+    {
+        return makeGenericSequenceType(t->itemType() | m_operands.at(1)->staticType()->itemType(),
+                                       t->cardinality().toWithoutMany());
+    }
+}
+
+QT_END_NAMESPACE