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| ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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| |
| // |
| // 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 <private/qabstractfloat_p.h> |
| #include <private/qatomiccomparator_p.h> |
| #include <private/qprimitives_p.h> |
| |
| /** |
| * @file |
| * @short Contains all the classes implementing comparisons between atomic values. |
| */ |
| |
| 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 |
| |
| #endif |