MatrixType.h

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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2006-2023 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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////////////////////////////////////////////////////////////////////////
 
#if ! defined (octave_MatrixType_h)
#define octave_MatrixType_h 1
 
#include "octave-config.h"
 
#include "mx-fwd.h"
 
#include "MSparse.h"
 
class
MatrixType
{
public:
  enum matrix_type
  {
    Unknown = 0,
    Full,
    Diagonal,
    Permuted_Diagonal,
    Upper,
    Lower,
    Permuted_Upper,
    Permuted_Lower,
    Banded,
    Hermitian,
    Banded_Hermitian,
    Tridiagonal,
    Tridiagonal_Hermitian,
    Rectangular
  };
 
  OCTAVE_API MatrixType (void);
 
  OCTAVE_API MatrixType (const MatrixType& a);
 
  OCTAVE_API MatrixType (const Matrix& a);
 
  OCTAVE_API MatrixType (const ComplexMatrix& a);
 
  OCTAVE_API MatrixType (const FloatMatrix& a);
 
  OCTAVE_API MatrixType (const FloatComplexMatrix& a);
 
  template <typename T>
  OCTAVE_API
  MatrixType (const MSparse<T>& a);
 
  OCTAVE_API MatrixType (const matrix_type t, bool _full = false);
 
  OCTAVE_API MatrixType (const matrix_type t, const octave_idx_type np,
                         const octave_idx_type *p, bool _full = false);
 
  OCTAVE_API MatrixType (const matrix_type t, const octave_idx_type ku,
                         const octave_idx_type kl, bool _full = false);
 
  OCTAVE_API ~MatrixType (void);
 
  OCTAVE_API MatrixType& operator = (const MatrixType& a);
 
  OCTAVE_API int type (bool quiet = true);
 
  OCTAVE_API int type (const Matrix& a);
 
  OCTAVE_API int type (const ComplexMatrix& a);
 
  OCTAVE_API int type (const FloatMatrix& a);
 
  OCTAVE_API int type (const FloatComplexMatrix& a);
 
  OCTAVE_API int type (const SparseMatrix& a);
 
  OCTAVE_API int type (const SparseComplexMatrix& a);
 
  double band_density (void) const { return m_bandden; }
 
  int nupper (void) const { return m_upper_band; }
 
  int nlower (void) const { return m_lower_band; }
 
  bool is_dense (void) const { return m_dense; }
 
  bool isdiag (void) const
  { return (m_type == Diagonal || m_type == Permuted_Diagonal); }
 
  bool istriu (void) const
  { return (m_type == Upper || m_type == Permuted_Upper); }
 
  bool istril (void) const
  { return (m_type == Lower || m_type == Permuted_Lower); }
 
  bool isbanded (void) const
  { return (m_type == Banded || m_type == Banded_Hermitian); }
 
  bool is_tridiagonal (void) const
  { return (m_type == Tridiagonal || m_type == Tridiagonal_Hermitian); }
 
  bool ishermitian (void) const
  {
    return (m_type == Banded_Hermitian || m_type == Tridiagonal_Hermitian
            || m_type == Hermitian);
  }
 
  bool is_rectangular (void) const { return (m_type == Rectangular); }
 
  bool is_known (void) const { return (m_type != Unknown); }
 
  bool is_unknown (void) const { return (m_type == Unknown); }
 
  OCTAVE_API void info (void) const;
 
  octave_idx_type * triangular_perm (void) const { return m_perm; }
 
  void invalidate_type (void) { m_type = Unknown; }
 
  void mark_as_diagonal (void) { m_type = Diagonal; }
 
  void mark_as_permuted_diagonal (void) { m_type = Permuted_Diagonal; }
 
  void mark_as_upper_triangular (void) { m_type = Upper; }
 
  void mark_as_lower_triangular (void) { m_type = Lower; }
 
  void mark_as_tridiagonal (void) {m_type = Tridiagonal; }
 
  void mark_as_banded (const octave_idx_type ku, const octave_idx_type kl)
  { m_type = Banded; m_upper_band = ku; m_lower_band = kl; }
 
  void mark_as_full (void) { m_type = Full; }
 
  void mark_as_rectangular (void) { m_type = Rectangular; }
 
  void mark_as_dense (void) { m_dense = true; }
 
  void mark_as_not_dense (void) { m_dense = false; }
 
  OCTAVE_API void mark_as_symmetric (void);
 
  OCTAVE_API void mark_as_unsymmetric (void);
 
  OCTAVE_API void mark_as_permuted (const octave_idx_type np, const octave_idx_type *p);
 
  OCTAVE_API void mark_as_unpermuted (void);
 
  OCTAVE_API MatrixType transpose (void) const;
 
private:
  void type (int new_typ) { m_type = static_cast<matrix_type> (new_typ); }
 
  matrix_type m_type;
  double m_sp_bandden;
  double m_bandden;
  octave_idx_type m_upper_band;
  octave_idx_type m_lower_band;
  bool m_dense;
  bool m_full;
  octave_idx_type m_nperm;
  octave_idx_type *m_perm;
};
 
#endif