Truncate.h

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/*
 * Copyright (C) 2012 by
 *   MetraLabs GmbH (MLAB), GERMANY
 * and
 *   Neuroinformatics and Cognitive Robotics Labs (NICR) at TU Ilmenau, GERMANY
 * All rights reserved.
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 * Contact: info@mira-project.org
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 *   Foundation and appearing in the file LICENSE.GPL3 included in the
 *   packaging of this file. Please review the following information to
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#ifndef _MIRA_TRUNCATE_H_
#define _MIRA_TRUNCATE_H_

#include <cmath>
#include <type_traits>
#include <platform/Types.h>

namespace mira {


template<typename T>
T truncate(T value, uint32 decimals)
{
    static_assert(std::is_floating_point<T>::value, "truncate must be used with floating point types");

    T factor = std::pow((T)10, (int)decimals);
    if (value > 0)
    {
        T v = factor * value;
        return std::floor(v) / factor;
    }
    else
    {
        T v = factor * value;
        return std::ceil(v) / factor;
    }
}


}

#endif