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Diffstat (limited to 'src/xmlpatterns/data/qatomiccomparators_p.h')
| -rw-r--r-- | src/xmlpatterns/data/qatomiccomparators_p.h | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/src/xmlpatterns/data/qatomiccomparators_p.h b/src/xmlpatterns/data/qatomiccomparators_p.h new file mode 100644 index 0000000..614916f --- /dev/null +++ b/src/xmlpatterns/data/qatomiccomparators_p.h @@ -0,0 +1,298 @@ +/**************************************************************************** +** +** 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. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// +// 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 |