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289 lines
7.0 KiB
289 lines
7.0 KiB
/****************************************************************************
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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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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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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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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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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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** $QT_END_LICENSE$
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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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#include <math.h>
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#include <QtCore/qglobal.h>
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#ifdef Q_OS_SYMBIAN
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# include <e32math.h>
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#endif
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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QT_MODULE(Core)
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#define QT_SINE_TABLE_SIZE 256
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extern Q_CORE_EXPORT const qreal qt_sine_table[QT_SINE_TABLE_SIZE];
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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#ifndef M_PI
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#define M_PI (3.14159265358979323846)
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#endif
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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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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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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // QMATH_H
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