/****************************************************************************
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** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
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** This file is part of the QtQml module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** 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
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#ifndef QMLJS_MATH_H
#define QMLJS_MATH_H

//
//  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.
//

#include <qglobal.h>

#include <QtCore/qnumeric.h>
#include <QtCore/private/qnumeric_p.h>
#include <cmath>

#if defined(Q_CC_GNU)
#define QMLJS_READONLY __attribute((const))
#else
#define QMLJS_READONLY
#endif

QT_BEGIN_NAMESPACE

namespace QV4 {

static inline QMLJS_READONLY ReturnedValue add_int32(int a, int b, quint8 *traceInfo = nullptr)
{
    int result;
    if (Q_UNLIKELY(add_overflow(a, b, &result))) {
        if (traceInfo)
            *traceInfo |= quint8(QV4::ObservedTraceValues::Double);
        return Value::fromDouble(static_cast<double>(a) + b).asReturnedValue();
    }
    if (traceInfo)
        *traceInfo |= quint8(QV4::ObservedTraceValues::Integer);
    return Value::fromInt32(result).asReturnedValue();
}

static inline QMLJS_READONLY ReturnedValue sub_int32(int a, int b, quint8 *traceInfo = nullptr)
{
    int result;
    if (Q_UNLIKELY(sub_overflow(a, b, &result))) {
        if (traceInfo)
            *traceInfo |= quint8(QV4::ObservedTraceValues::Double);
        return Value::fromDouble(static_cast<double>(a) - b).asReturnedValue();
    }
    if (traceInfo)
        *traceInfo |= quint8(QV4::ObservedTraceValues::Integer);
    return Value::fromInt32(result).asReturnedValue();
}

static inline QMLJS_READONLY ReturnedValue mul_int32(int a, int b, quint8 *traceInfo = nullptr)
{
    int result;
    if (Q_UNLIKELY(mul_overflow(a, b, &result))) {
        if (traceInfo)
            *traceInfo |= quint8(QV4::ObservedTraceValues::Double);
        return Value::fromDouble(static_cast<double>(a) * b).asReturnedValue();
    }
    if (traceInfo)
        *traceInfo |= quint8(QV4::ObservedTraceValues::Integer);
    return Value::fromInt32(result).asReturnedValue();
}

}

QT_END_NAMESPACE

#ifdef QMLJS_READONLY
#undef QMLJS_READONLY
#endif

#endif // QMLJS_MATH_H
