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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qbuiltintypes_p.h"
#include "qitem_p.h"
#include "qvalidationerror_p.h"

#include "qinteger_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

Item Integer::fromValue(const xsInteger num)
{
    return toItem(Integer::Ptr(new Integer(num)));
}

AtomicValue::Ptr Integer::fromLexical(const QString &strNumeric)
{
    bool conversionOk = false;
    const xsInteger num = strNumeric.toLongLong(&conversionOk);

    if(conversionOk)
        return AtomicValue::Ptr(new Integer(num));
    else
        return ValidationError::createError();
}

Integer::Integer(const xsInteger num) : m_value(num)
{
}

bool Integer::evaluateEBV(const QExplicitlySharedDataPointer<DynamicContext> &) const
{
    return m_value != 0;
}

QString Integer::stringValue() const
{
    return QString::number(m_value);
}

ItemType::Ptr Integer::type() const
{
    return BuiltinTypes::xsInteger;
}

xsDouble Integer::toDouble() const
{
    return static_cast<xsDouble>(m_value);
}

xsInteger Integer::toInteger() const
{
    return m_value;
}

xsFloat Integer::toFloat() const
{
    return static_cast<xsFloat>(m_value);
}

xsDecimal Integer::toDecimal() const
{
    return static_cast<xsDecimal>(m_value);
}

Numeric::Ptr Integer::round() const
{
    /* xs:integerS never has a mantissa. */
    return Numeric::Ptr(const_cast<Integer *>(this));
}

Numeric::Ptr Integer::roundHalfToEven(const xsInteger /*scale*/) const
{
    return Numeric::Ptr(const_cast<Integer *>(this));
}

Numeric::Ptr Integer::floor() const
{
    return Numeric::Ptr(const_cast<Integer *>(this));
}

Numeric::Ptr Integer::ceiling() const
{
    return Numeric::Ptr(const_cast<Integer *>(this));
}

Numeric::Ptr Integer::abs() const
{
    /* No reason to allocate an Integer if we're already absolute. */
    if(m_value < 0)
        return Numeric::Ptr(new Integer(qAbs(m_value)));
    else
        return Numeric::Ptr(const_cast<Integer *>(this));
}

bool Integer::isNaN() const
{
    return false;
}

bool Integer::isInf() const
{
    return false;
}

Item Integer::toNegated() const
{
    return fromValue(-m_value);
}

bool Integer::isSigned() const
{
    return true;
}

qulonglong Integer::toUnsignedInteger() const
{
    Q_ASSERT_X(false, Q_FUNC_INFO,
               "It makes no sense to call this function, see Numeric::toUnsignedInteger().");
    return 0;
}

QT_END_NAMESPACE