Ifpack2_ConfigDefs.hpp

/*@HEADER
// ***********************************************************************
// 
//       Ifpack2: Tempated Object-Oriented Algebraic Preconditioner Package
//                 Copyright (2009) Sandia Corporation
// 
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
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// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
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// Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
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*/

#ifndef _IFPACK2_CONFIGDEFS_HPP_
#define _IFPACK2_CONFIGDEFS_HPP_

#include <Ifpack2_config.h>
#include <Teuchos_ScalarTraits.hpp>

//The sgn function isn't well defined for complex.
//Is it correct to operate on the real part of x as is done below?
template<class Scalar>
typename Teuchos::ScalarTraits<Scalar>::magnitudeType
IFPACK2_SGN(const Scalar& x)
{
  static const typename Teuchos::ScalarTraits<Scalar>::magnitudeType one = Teuchos::ScalarTraits<Scalar>::magnitude(Teuchos::ScalarTraits<Scalar>::one());
  return Teuchos::ScalarTraits<Scalar>::real(x) > 0.0 ? -one : one;
}

#include <Tpetra_ConfigDefs.hpp>
namespace Ifpack2 {
  typedef Tpetra::global_size_t global_size_t;
}

#endif /*_IFPACK2_CONFIGDEFS_HPP_*/