/****************************************************************************
**
** 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qcommonnamespaces_p.h"

#include "qboolean_p.h"
#include "qcommonvalues_p.h"
#include "qinteger_p.h"
#include "qatomicstring_p.h"

#include "qcomparestringfns_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

Item CodepointEqualFN::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    const Item op1(m_operands.first()->evaluateSingleton(context));
    if(!op1)
        return Item();

    const Item op2(m_operands.last()->evaluateSingleton(context));
    if(!op2)
        return Item();

    if(caseSensitivity() == Qt::CaseSensitive)
        return Boolean::fromValue(op1.stringValue() == op2.stringValue());
    else
    {
        const QString s1(op1.stringValue());
        const QString s2(op2.stringValue());

        return Boolean::fromValue(s1.length() == s2.length() &&
                                  s1.startsWith(s2, Qt::CaseInsensitive));
    }
}

Item CompareFN::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    const Item op1(m_operands.first()->evaluateSingleton(context));
    if(!op1)
        return Item();

    const Item op2(m_operands.at(1)->evaluateSingleton(context));
    if(!op2)
        return Item();

    const int retval = caseSensitivity() == Qt::CaseSensitive
                       ? op1.stringValue().compare(op2.stringValue())
                       : op1.stringValue().toLower().compare(op2.stringValue().toLower());

    if(retval > 0)
        return CommonValues::IntegerOne;
    else if(retval < 0)
        return CommonValues::IntegerOneNegative;
    else
    {
        Q_ASSERT(retval == 0);
        return CommonValues::IntegerZero;
    }
}

QT_END_NAMESPACE