/*
//@HEADER
// ************************************************************************
//
//                        Kokkos v. 3.0
//       Copyright (2020) National Technology & Engineering
//               Solutions of Sandia, LLC (NTESS).
//
// Under the terms of Contract DE-NA0003525 with NTESS,
// the U.S. Government retains certain rights in this software.
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// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
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// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
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// 3. Neither the name of the Corporation nor the names of the
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// this software without specific prior written permission.
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//
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*/

#ifndef KOKKOS_PHYSICAL_LAYOUT_HPP
#define KOKKOS_PHYSICAL_LAYOUT_HPP

#include <Kokkos_View.hpp>

namespace Kokkos {
namespace Impl {

struct PhysicalLayout {
  enum LayoutType { Left, Right, Scalar, Error };
  LayoutType layout_type;
  int rank;
  long long int stride[9];  // distance between two neighboring elements in a
                            // given dimension

  template <class T, class L, class D, class M>
  PhysicalLayout(const View<T, L, D, M>& view)
      : layout_type(
            is_same<typename View<T, L, D, M>::array_layout, LayoutLeft>::value
                ? Left
                : (is_same<typename View<T, L, D, M>::array_layout,
                           LayoutRight>::value
                       ? Right
                       : Error)),
        rank(view.Rank) {
    for (int i = 0; i < 9; i++) stride[i] = 0;
    view.stride(stride);
  }
};

}  // namespace Impl
}  // namespace Kokkos
#endif
