// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2009 Guillaume Saupin <guillaume.saupin@cea.fr>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

#ifndef EIGEN_SKYLINEUTIL_H
#define EIGEN_SKYLINEUTIL_H

// IWYU pragma: private
#include "./InternalHeaderCheck.h"

namespace Eigen {

#ifdef NDEBUG
#define EIGEN_DBG_SKYLINE(X)
#else
#define EIGEN_DBG_SKYLINE(X) X
#endif

const unsigned int SkylineBit = 0x1200;
template <typename Lhs, typename Rhs, int ProductMode>
class SkylineProduct;
enum AdditionalProductEvaluationMode { SkylineTimeDenseProduct, SkylineTimeSkylineProduct, DenseTimeSkylineProduct };
enum { IsSkyline = SkylineBit };

#define EIGEN_SKYLINE_INHERIT_ASSIGNMENT_OPERATOR(Derived, Op)                                    \
  template <typename OtherDerived>                                                                \
  EIGEN_STRONG_INLINE Derived& operator Op(const Eigen::SkylineMatrixBase<OtherDerived>& other) { \
    return Base::operator Op(other.derived());                                                    \
  }                                                                                               \
  EIGEN_STRONG_INLINE Derived& operator Op(const Derived & other) { return Base::operator Op(other); }

#define EIGEN_SKYLINE_INHERIT_SCALAR_ASSIGNMENT_OPERATOR(Derived, Op) \
  template <typename Other>                                           \
  EIGEN_STRONG_INLINE Derived& operator Op(const Other & scalar) {    \
    return Base::operator Op(scalar);                                 \
  }

#define EIGEN_SKYLINE_INHERIT_ASSIGNMENT_OPERATORS(Derived)     \
  EIGEN_SKYLINE_INHERIT_ASSIGNMENT_OPERATOR(Derived, =)         \
  EIGEN_SKYLINE_INHERIT_ASSIGNMENT_OPERATOR(Derived, +=)        \
  EIGEN_SKYLINE_INHERIT_ASSIGNMENT_OPERATOR(Derived, -=)        \
  EIGEN_SKYLINE_INHERIT_SCALAR_ASSIGNMENT_OPERATOR(Derived, *=) \
  EIGEN_SKYLINE_INHERIT_SCALAR_ASSIGNMENT_OPERATOR(Derived, /=)

#define EIGEN_SKYLINE_GENERIC_PUBLIC_INTERFACE_(Derived, BaseClass)           \
  typedef BaseClass Base;                                                     \
  typedef typename Eigen::internal::traits<Derived>::Scalar Scalar;           \
  typedef typename Eigen::NumTraits<Scalar>::Real RealScalar;                 \
  typedef typename Eigen::internal::traits<Derived>::StorageKind StorageKind; \
  typedef typename Eigen::internal::index<StorageKind>::type Index;           \
  enum {                                                                      \
    Flags = Eigen::internal::traits<Derived>::Flags,                          \
  };

#define EIGEN_SKYLINE_GENERIC_PUBLIC_INTERFACE(Derived) \
  EIGEN_SKYLINE_GENERIC_PUBLIC_INTERFACE_(Derived, Eigen::SkylineMatrixBase<Derived>)

template <typename Derived>
class SkylineMatrixBase;
template <typename Scalar_, int Flags_ = 0>
class SkylineMatrix;
template <typename Scalar_, int Flags_ = 0>
class DynamicSkylineMatrix;
template <typename Scalar_, int Flags_ = 0>
class SkylineVector;
template <typename Scalar_, int Flags_ = 0>
class MappedSkylineMatrix;

namespace internal {

template <typename Lhs, typename Rhs>
struct skyline_product_mode;
template <typename Lhs, typename Rhs, int ProductMode = skyline_product_mode<Lhs, Rhs>::value>
struct SkylineProductReturnType;

template <typename T>
class eval<T, IsSkyline> {
  typedef typename traits<T>::Scalar Scalar_;
  enum { Flags_ = traits<T>::Flags };

 public:
  typedef SkylineMatrix<Scalar_, Flags_> type;
};

}  // end namespace internal

}  // end namespace Eigen

#endif  // EIGEN_SKYLINEUTIL_H