scalarOps.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2019 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
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    under the terms of the GNU General Public License as published by
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    for more details.
 
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InNamespace
    Foam
 
Description
    Functors that are scalar-specific.
 
\*---------------------------------------------------------------------------*/
 
#ifndef scalarOps_H
#define scalarOps_H
 
#include "scalar.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
//- Hypot operation (scalar only)
template<class T>
struct hypotOp
{
    T operator()(const T& x, const T& y) const
    {
        return std::hypot(x, y);
    }
};
 
 
//- Scalar division with divide-by-zero protection
//  Uses stabilise, but could also handle as per modulo and return zero
template<class T, class T2=Foam::scalar>
struct scalarDivideOp
{
    T operator()(const T& x, const T2& y) const
    {
        return (x / stabilise(y, pTraits<T2>::vsmall));
    }
};
 
 
//- Floating point modulo operation with divide-by-zero protection
template<class T, class T2=Foam::scalar>
struct scalarModuloOp
{
    T operator()(const T& x, const T2& y) const
    {
        if (Foam::mag(y) < pTraits<T2>::vsmall)
        {
            return pTraits<T>::zero;
        }
        return std::fmod(x, y);
    }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //