/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
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** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
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** accordance with the commercial license agreement provided with the
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****************************************************************************/

#include <QString>

#include "qatomiccomparator_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

AtomicComparator::AtomicComparator()
{
}

AtomicComparator::~AtomicComparator()
{
}

AtomicComparator::ComparisonResult
AtomicComparator::compare(const Item &,
                          const AtomicComparator::Operator,
                          const Item &) const
{
    Q_ASSERT_X(false, Q_FUNC_INFO, "This function should never be called.");
    return LessThan;
}

QString AtomicComparator::displayName(const AtomicComparator::Operator op,
                                      const ComparisonType type)
{
    Q_ASSERT(type == AsGeneralComparison || type == AsValueComparison);
    if(type == AsGeneralComparison)
    {
        switch(op)
        {
            case OperatorEqual:
                return QLatin1String("=");
            case OperatorGreaterOrEqual:
                return QLatin1String("<=");
            case OperatorGreaterThan:
                return QLatin1String("<");
            case OperatorLessOrEqual:
                return QLatin1String(">=");
            case OperatorLessThanNaNLeast:
            /* Fallthrough. */
            case OperatorLessThanNaNGreatest:
            /* Fallthrough. */
            case OperatorLessThan:
                return QLatin1String(">");
            case OperatorNotEqual:
                return QLatin1String("!=");
        }
    }

    switch(op)
    {
        case OperatorEqual:
            return QLatin1String("eq");
        case OperatorGreaterOrEqual:
            return QLatin1String("ge");
        case OperatorGreaterThan:
            return QLatin1String("gt");
        case OperatorLessOrEqual:
            return QLatin1String("le");
        case OperatorLessThanNaNLeast:
        /* Fallthrough. */
        case OperatorLessThanNaNGreatest:
        /* Fallthrough. */
        case OperatorLessThan:
            return QLatin1String("lt");
        case OperatorNotEqual:
            return QLatin1String("ne");
    }

    Q_ASSERT(false);
    return QString(); /* GCC unbarfer. */
}

QT_END_NAMESPACE
