FCL/sf/mw/qt: comparison util/src/xmlpatterns/data/qatomiccomparators

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+:f7bc934e204c
+/****************************************************************************
+**
+** Copyright (C) 2010 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+#ifndef Patternist_AtomicComparators_H
+#define Patternist_AtomicComparators_H
+#include "qabstractfloat_p.h"
+#include "qatomiccomparator_p.h"
+#include "qprimitives_p.h"
+/**
+* @file
+* @short Contains all the classes implementing comparisons between atomic values.
+*/
+QT_BEGIN_HEADER
+QT_BEGIN_NAMESPACE
+namespace QPatternist
+{
+/**
+* @short Performs case @em sensitive string comparison
+* between @c xs:anyUri, @c xs:string, and @c xs:untypedAtomic.
+*
+* @ingroup Patternist_xdm
+* @author Frans Englich <frans.englich@nokia.com>
+*/
+class StringComparator : public AtomicComparator
+{
+public:
+/**
+* Compares two strings, and returns the appropriate AtomicComparator::ComparisonResult enum. This
+* is a bit simplified version of string comparison as defined in the XPath specifications,
+* since this does not take any string collations into account(which an implementation neither
+* is required to do).
+*
+* @see <a href="http://www.w3.org/TR/xpath-functions/#string-compare">XQuery 1.0 and XPath
+* 2.0 Functions and Operators, 7.3 ValueComparison::Equality and Comparison of Strings</a>
+*/
+virtual ComparisonResult compare(const Item &op1,
+const AtomicComparator::Operator op,
+const Item &op2) const;
+/**
+* Compares two strings, and returns @c true if they are considered equal as per
+* an ordinary string comparison. In other words, this is an implementation with
+* the Unicode code point collation.
+*
+* @see <a href="http://www.w3.org/TR/xpath-functions/#string-compare">XQuery 1.0 and XPath
+* 2.0 Functions and Operators, 7.3 ValueComparison::Equality and Comparison of Strings</a>
+*/
+virtual bool equals(const Item &op1,
+const Item &op2) const;
+};
+/**
+* @short Performs case @em insensitive string comparison
+* between @c xs:anyUri, @c xs:string, and @c xs:untypedAtomic.
+*
+* @ingroup Patternist_xdm
+* @author Frans Englich <frans.englich@nokia.com>
+*/
+class CaseInsensitiveStringComparator : public AtomicComparator
+{
+public:
+/**
+* Converts both string values to upper case and afterwards compare them.
+*/
+virtual ComparisonResult compare(const Item &op1,
+const AtomicComparator::Operator op,
+const Item &op2) const;
+/**
+* Converts both string values case insensitively.
+*/
+virtual bool equals(const Item &op1,
+const Item &op2) const;
+};
+/**
+* @short Compares @c xs:base64Binary and @c xs:hexBinary values.
+*
+* @author Frans Englich <frans.englich@nokia.com>
+*/
+class BinaryDataComparator : public AtomicComparator
+{
+public:
+virtual bool equals(const Item &op1,
+const Item &op2) const;
+};
+/**
+* @short Compares @c xs:boolean values.
+*
+* This is done via the object's Boolean::evaluteEBV() function.
+*
+* @author Frans Englich <frans.englich@nokia.com>
+*/
+class BooleanComparator : public AtomicComparator
+{
+public:
+virtual ComparisonResult compare(const Item &op1,
+const AtomicComparator::Operator op,
+const Item &op2) const;
+virtual bool equals(const Item &op1,
+const Item &op2) const;
+};
+/**
+* @short Compares @c xs:double values.
+*
+* @todo Add docs about numeric promotion
+*
+* @author Frans Englich <frans.englich@nokia.com>
+*/
+class AbstractFloatComparator : public AtomicComparator
+{
+public:
+virtual ComparisonResult compare(const Item &op1,
+const AtomicComparator::Operator op,
+const Item &op2) const;
+virtual bool equals(const Item &op1,
+const Item &op2) const;
+};
+/**
+* @short Compares @c xs:double values for the purpose of sorting.
+*
+* @todo Add docs about numeric promotion
+*
+* @author Frans Englich <frans.englich@nokia.com>
+*/
+template<const AtomicComparator::Operator t_op>
+class AbstractFloatSortComparator : public AbstractFloatComparator
+{
+public:
+virtual ComparisonResult compare(const Item &o1,
+const AtomicComparator::Operator op,
+const Item &o2) const
+{
+Q_ASSERT_X(t_op == OperatorLessThanNaNLeast || t_op == OperatorLessThanNaNGreatest, Q_FUNC_INFO,
+"Can only be instantiated with those two.");
+Q_ASSERT(op == t_op);
+Q_UNUSED(op); /* Needed when building in release mode. */
+const xsDouble v1 = o1.template as<Numeric>()->toDouble();
+const xsDouble v2 = o2.template as<Numeric>()->toDouble();
+if(qIsNaN(v1) && !qIsNaN(v2))
+return t_op == OperatorLessThanNaNLeast ? LessThan : GreaterThan;
+if(!qIsNaN(v1) && qIsNaN(v2))
+return t_op == OperatorLessThanNaNLeast ? GreaterThan : LessThan;
+if(Double::isEqual(v1, v2))
+return Equal;
+else if(v1 < v2)
+return LessThan;
+else
+return GreaterThan;
+}
+};
+/**
+* @short Compares @c xs:decimal values.
+*
+* @author Frans Englich <frans.englich@nokia.com>
+*/
+class DecimalComparator : public AtomicComparator
+{
+public:
+virtual ComparisonResult compare(const Item &op1,
+const AtomicComparator::Operator op,
+const Item &op2) const;
+virtual bool equals(const Item &op1,
+const Item &op2) const;
+};
+/**
+* @short Compares @c xs:integer values.
+*
+* @author Frans Englich <frans.englich@nokia.com>
+*/
+class IntegerComparator : public AtomicComparator
+{
+public:
+virtual ComparisonResult compare(const Item &op1,
+const AtomicComparator::Operator op,
+const Item &op2) const;
+virtual bool equals(const Item &op1,
+const Item &op2) const;
+};
+/**
+* @short Compares @c xs:QName values.
+*
+* @author Frans Englich <frans.englich@nokia.com>
+*/
+class QNameComparator : public AtomicComparator
+{
+public:
+virtual bool equals(const Item &op1,
+const Item &op2) const;
+};
+/**
+* @short Compares sub-classes of AbstractDateTime.
+*
+* @author Frans Englich <frans.englich@nokia.com>
+*/
+class AbstractDateTimeComparator : public AtomicComparator
+{
+public:
+virtual ComparisonResult compare(const Item &op1,
+const AtomicComparator::Operator op,
+const Item &op2) const;
+virtual bool equals(const Item &op1,
+const Item &op2) const;
+};
+/**
+* @short Compares sub-classes of AbstractDuration.
+*
+* @author Frans Englich <frans.englich@nokia.com>
+*/
+class AbstractDurationComparator : public AtomicComparator
+{
+public:
+virtual ComparisonResult compare(const Item &op1,
+const AtomicComparator::Operator op,
+const Item &op2) const;
+virtual bool equals(const Item &op1,
+const Item &op2) const;
+private:
+static inline QDateTime addDurationToDateTime(const QDateTime &dateTime,
+const AbstractDuration *const duration);
+};
+}
+QT_END_NAMESPACE
+QT_END_HEADER
+#endif