/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtCore module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef QMATH_H+
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#define QMATH_H+
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+
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#include <math.h>+
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+
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#include <QtCore/qglobal.h>+
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+
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#ifdef Q_OS_SYMBIAN+
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#    include <e32math.h>+
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#endif+
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+
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QT_BEGIN_HEADER+
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+
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QT_BEGIN_NAMESPACE+
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+
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QT_MODULE(Core)+
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+
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#define QT_SINE_TABLE_SIZE 256+
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+
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extern Q_CORE_EXPORT const qreal qt_sine_table[QT_SINE_TABLE_SIZE];+
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+
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inline int qCeil(qreal v)+
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{+
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#ifdef QT_USE_MATH_H_FLOATS+
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    if (sizeof(qreal) == sizeof(float))+
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        return int(ceilf(float(v)));+
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    else+
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#endif+
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        return int(ceil(v));+
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}+
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+
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inline int qFloor(qreal v)+
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{+
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#ifdef QT_USE_MATH_H_FLOATS+
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    if (sizeof(qreal) == sizeof(float))+
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        return int(floorf(float(v)));+
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    else+
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#endif+
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        return int(floor(v));+
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}+
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+
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inline qreal qFabs(qreal v)+
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{+
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#ifdef QT_USE_MATH_H_FLOATS+
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    if(sizeof(qreal) == sizeof(float))+
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        return fabsf(float(v));+
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    else+
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#endif+
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        return fabs(v);+
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}+
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+
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inline qreal qSin(qreal v)+
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{+
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#ifdef Q_OS_SYMBIAN+
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    TReal sin_v;+
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    Math::Sin(sin_v, static_cast<TReal>(v));+
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    return static_cast<qreal>(sin_v);+
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#else+
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#    ifdef QT_USE_MATH_H_FLOATS+
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        if (sizeof(qreal) == sizeof(float))+
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            return sinf(float(v));+
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        else+
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#    endif+
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            return sin(v);+
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#endif+
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}+
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+
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inline qreal qCos(qreal v)+
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{+
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#ifdef Q_OS_SYMBIAN+
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    TReal cos_v;+
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    Math::Cos(cos_v, static_cast<TReal>(v));+
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    return static_cast<qreal>(cos_v);+
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#else+
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#    ifdef QT_USE_MATH_H_FLOATS+
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        if (sizeof(qreal) == sizeof(float))+
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            return cosf(float(v));+
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        else+
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#    endif+
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            return cos(v);+
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#endif+
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}+
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+
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inline qreal qTan(qreal v)+
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{+
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#ifdef Q_OS_SYMBIAN+
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    TReal tan_v;+
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    Math::Tan(tan_v, static_cast<TReal>(v));+
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    return static_cast<qreal>(tan_v);+
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#else+
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#    ifdef QT_USE_MATH_H_FLOATS+
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        if (sizeof(qreal) == sizeof(float))+
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            return tanf(float(v));+
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        else+
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#    endif+
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            return tan(v);+
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#endif+
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}+
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+
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inline qreal qAcos(qreal v)+
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{+
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#ifdef Q_OS_SYMBIAN+
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    TReal acos_v;+
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    Math::ACos(acos_v, static_cast<TReal>(v));+
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    return static_cast<qreal>(acos_v);+
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#else+
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#    ifdef QT_USE_MATH_H_FLOATS+
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        if (sizeof(qreal) == sizeof(float))+
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            return acosf(float(v));+
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        else+
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#    endif+
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           return acos(v);+
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#endif+
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}+
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+
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inline qreal qAsin(qreal v)+
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{+
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#ifdef Q_OS_SYMBIAN+
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    TReal asin_v;+
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    Math::ASin(asin_v, static_cast<TReal>(v));+
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    return static_cast<qreal>(asin_v);+
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#else+
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#    ifdef QT_USE_MATH_H_FLOATS+
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        if (sizeof(qreal) == sizeof(float))+
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            return asinf(float(v));+
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        else+
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#    endif+
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            return asin(v);+
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#endif+
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}+
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+
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inline qreal qAtan(qreal v)+
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{+
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#ifdef Q_OS_SYMBIAN+
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    TReal atan_v;+
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    Math::ATan(atan_v, static_cast<TReal>(v));+
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    return static_cast<qreal>(atan_v);+
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#else+
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#    ifdef QT_USE_MATH_H_FLOATS+
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        if(sizeof(qreal) == sizeof(float))+
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            return atanf(float(v));+
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        else+
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#    endif+
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            return atan(v);+
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#endif+
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}+
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+
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inline qreal qAtan2(qreal x, qreal y)+
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{+
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#ifdef Q_OS_SYMBIAN+
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    TReal atan2_v;+
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    Math::ATan(atan2_v, static_cast<TReal>(x), static_cast<TReal>(y));+
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    return static_cast<qreal>(atan2_v);+
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#else+
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#    ifdef QT_USE_MATH_H_FLOATS+
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        if(sizeof(qreal) == sizeof(float))+
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            return atan2f(float(x), float(y));+
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        else+
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#    endif+
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            return atan2(x, y);+
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#endif+
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}+
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+
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inline qreal qSqrt(qreal v)+
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{+
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#ifdef Q_OS_SYMBIAN+
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    TReal sqrt_v;+
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    Math::Sqrt(sqrt_v, static_cast<TReal>(v));+
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    return static_cast<qreal>(sqrt_v);+
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#else+
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#    ifdef QT_USE_MATH_H_FLOATS+
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        if (sizeof(qreal) == sizeof(float))+
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            return sqrtf(float(v));+
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        else+
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#    endif+
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            return sqrt(v);+
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#endif+
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}+
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+
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inline qreal qLn(qreal v)+
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{+
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#ifdef QT_USE_MATH_H_FLOATS+
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    if (sizeof(qreal) == sizeof(float))+
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        return logf(float(v));+
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    else+
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#endif+
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        return log(v);+
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}+
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+
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inline qreal qExp(qreal v)+
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{+
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#ifdef Q_OS_SYMBIAN+
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    TReal exp_v;+
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    Math::Exp(exp_v, static_cast<TReal>(v));+
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    return static_cast<qreal>(exp_v);+
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#else+
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    // only one signature+
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    // exists, exp(double)+
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    return exp(v);+
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#endif+
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}+
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+
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inline qreal qPow(qreal x, qreal y)+
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{+
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#ifdef Q_OS_SYMBIAN+
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    TReal pow_v;+
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    Math::Pow(pow_v, static_cast<TReal>(x), static_cast<TReal>(y));+
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    return static_cast<qreal>(pow_v);+
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#else+
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#    ifdef QT_USE_MATH_H_FLOATS+
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        if (sizeof(qreal) == sizeof(float))+
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            return powf(float(x), float(y));+
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        else+
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#    endif+
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            return pow(x, y);+
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#endif+
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}+
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+
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#ifndef M_PI+
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#define M_PI (3.14159265358979323846)+
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#endif+
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+
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inline qreal qFastSin(qreal x)+
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{+
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    int si = int(x * (0.5 * QT_SINE_TABLE_SIZE / M_PI)); // Would be more accurate with qRound, but slower.+
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    qreal d = x - si * (2.0 * M_PI / QT_SINE_TABLE_SIZE);+
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    int ci = si + QT_SINE_TABLE_SIZE / 4;+
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    si &= QT_SINE_TABLE_SIZE - 1;+
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    ci &= QT_SINE_TABLE_SIZE - 1;+
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    return qt_sine_table[si] + (qt_sine_table[ci] - 0.5 * qt_sine_table[si] * d) * d;+
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}+
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+
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inline qreal qFastCos(qreal x)+
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{+
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    int ci = int(x * (0.5 * QT_SINE_TABLE_SIZE / M_PI)); // Would be more accurate with qRound, but slower.+
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    qreal d = x - ci * (2.0 * M_PI / QT_SINE_TABLE_SIZE);+
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    int si = ci + QT_SINE_TABLE_SIZE / 4;+
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    si &= QT_SINE_TABLE_SIZE - 1;+
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    ci &= QT_SINE_TABLE_SIZE - 1;+
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    return qt_sine_table[si] - (qt_sine_table[ci] + 0.5 * qt_sine_table[si] * d) * d;+
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}+
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+
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QT_END_NAMESPACE+
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+
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QT_END_HEADER+
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+
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#endif // QMATH_H+
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