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#ifndef QMATH_H

#define QMATH_H

#include <math.h>

#include <QtCore/qglobal.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Core)

#define QT_SINE_TABLE_SIZE 256

extern Q_CORE_EXPORT const qreal qt_sine_table[QT_SINE_TABLE_SIZE];

inline int qCeil(qreal v)

{

#ifdef QT_USE_MATH_H_FLOATS

    if (sizeof(qreal) == sizeof(float))

        return int(ceilf(float(v)));

    else

#endif

        return int(ceil(v));

}

inline int qFloor(qreal v)

{

#ifdef QT_USE_MATH_H_FLOATS

    if (sizeof(qreal) == sizeof(float))

        return int(floorf(float(v)));

    else

#endif

        return int(floor(v));

}

inline qreal qSin(qreal v)

{

#ifdef QT_USE_MATH_H_FLOATS

    if (sizeof(qreal) == sizeof(float))

        return sinf(float(v));

    else

#endif

        return sin(v);

}

inline qreal qCos(qreal v)

{

#ifdef QT_USE_MATH_H_FLOATS

    if (sizeof(qreal) == sizeof(float))

        return cosf(float(v));

    else

#endif

        return cos(v);

}

inline qreal qAcos(qreal v)

{

#ifdef QT_USE_MATH_H_FLOATS

    if (sizeof(qreal) == sizeof(float))

        return acosf(float(v));

    else

#endif

        return acos(v);

}

inline qreal qSqrt(qreal v)

{

#ifdef QT_USE_MATH_H_FLOATS

    if (sizeof(qreal) == sizeof(float))

        return sqrtf(float(v));

    else

#endif

        return sqrt(v);

}

inline qreal qLn(qreal v)

{

#ifdef QT_USE_MATH_H_FLOATS

    if (sizeof(qreal) == sizeof(float))

        return logf(float(v));

    else

#endif

        return log(v);

}

inline qreal qPow(qreal x, qreal y)

{

#ifdef QT_USE_MATH_H_FLOATS

    if (sizeof(qreal) == sizeof(float))

        return powf(float(x), float(y));

    else

#endif

        return pow(x, y);

}

#ifndef M_PI

#define M_PI (3.14159265358979323846)

#endif

inline qreal qFastSin(qreal x)

{

    int si = int(x * (0.5 * QT_SINE_TABLE_SIZE / M_PI)); // Would be more accurate with qRound, but slower.

    qreal d = x - si * (2.0 * M_PI / QT_SINE_TABLE_SIZE);

    int ci = si + QT_SINE_TABLE_SIZE / 4;

    si &= QT_SINE_TABLE_SIZE - 1;

    ci &= QT_SINE_TABLE_SIZE - 1;

    return qt_sine_table[si] + (qt_sine_table[ci] - 0.5 * qt_sine_table[si] * d) * d;

}

inline qreal qFastCos(qreal x)

{

    int ci = int(x * (0.5 * QT_SINE_TABLE_SIZE / M_PI)); // Would be more accurate with qRound, but slower.

    qreal d = x - ci * (2.0 * M_PI / QT_SINE_TABLE_SIZE);

    int si = ci + QT_SINE_TABLE_SIZE / 4;

    si &= QT_SINE_TABLE_SIZE - 1;

    ci &= QT_SINE_TABLE_SIZE - 1;

    return qt_sine_table[si] - (qt_sine_table[ci] + 0.5 * qt_sine_table[si] * d) * d;

}

QT_END_NAMESPACE

QT_END_HEADER

#endif // QMATH_H