qatomiccomparators_p.h

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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 "qabstractfloat_p.h"
#include "qatomiccomparator_p.h"
#include "qprimitives_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

namespace QPatternist
{
    class StringComparator : 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;
    };

    class CaseInsensitiveStringComparator : 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;
    };

    class BinaryDataComparator : public AtomicComparator
    {
    public:
        virtual bool equals(const Item &op1,
                            const Item &op2) const;
    };

    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;
    };

    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;
    };

    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;
        }

    };

    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;
    };

    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;
    };

    class QNameComparator : public AtomicComparator
    {
    public:
        virtual bool equals(const Item &op1,
                            const Item &op2) const;
    };

    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;
    };

    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