/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

//
//  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.
//

/*
 * @file
 * @short This file is included by qatomicmathematicians_p.h
 * if you need some includes, put them in qabstractfloatmathematician_p.h, outside of the namespace.
 */

template <const bool isDouble>
Item AbstractFloatMathematician<isDouble>::calculate(const Item &o1,
                                                          const Operator op,
                                                          const Item &o2,
                                                          const QExplicitlySharedDataPointer<DynamicContext> &context) const
{
    const Numeric *const num1 = o1.template as<Numeric>();
    const Numeric *const num2 = o2.template as<Numeric>();
    switch(op)
    {
        case Div:
            return toItem(AbstractFloat<isDouble>::fromValue(num1->toDouble() / num2->toDouble()));
        case IDiv:
        {
            if(num1->isNaN() || num2->isNaN())
            {
                context->error(QtXmlPatterns::tr("No operand in an integer division, %1, can be %2.")
                                  .arg(formatKeyword("idiv"))
                                  .arg(formatData("NaN")),
                               ReportContext::FOAR0002, this);
            }
            else if(num1->isInf())
            {
                context->error(QtXmlPatterns::tr("The first operand in an integer division, %1, cannot be infinity (%2).")
                                                 .arg(formatKeyword("idiv"))
                                                 .arg(formatData("INF")),
                               ReportContext::FOAR0002, this);
            }
            else if(num2->toInteger() == 0)
                context->error(QtXmlPatterns::tr("The second operand in a division, %1, cannot be zero (%2).")
                                                 .arg(formatKeyword("idiv"))
                                                 .arg(formatData("0")),
                               ReportContext::FOAR0001, this);

            return Integer::fromValue(static_cast<xsInteger>(num1->toDouble() / num2->toDouble()));
        }
        case Substract:
            return toItem(AbstractFloat<isDouble>::fromValue(num1->toDouble() - num2->toDouble()));
        case Mod:
            return toItem(AbstractFloat<isDouble>::fromValue(::fmod(num1->toDouble(), num2->toDouble())));
        case Multiply:
            return toItem(AbstractFloat<isDouble>::fromValue(num1->toDouble() * num2->toDouble()));
        case Add:
            return toItem(AbstractFloat<isDouble>::fromValue(num1->toDouble() + num2->toDouble()));
    }

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