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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1996-2025 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
// (at your option) any later version.
//
// Octave is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING. If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////
#if ! defined (octave_MDiagArray2_h)
#define octave_MDiagArray2_h 1
#include "octave-config.h"
#include "DiagArray2.h"
#include "MArray.h"
template <typename T> class MDiagArray2;
template <typename T> MDiagArray2<T> operator + (const MDiagArray2<T>&);
template <typename T> MDiagArray2<T> operator - (const MDiagArray2<T>&);
template <typename T> MDiagArray2<T> operator * (const MDiagArray2<T>&,
const T&);
template <typename T> MDiagArray2<T> operator / (const MDiagArray2<T>&,
const T&);
template <typename T> MDiagArray2<T> operator * (const T&,
const MDiagArray2<T>&);
template <typename T> MDiagArray2<T> operator + (const MDiagArray2<T>&,
const MDiagArray2<T>&);
template <typename T> MDiagArray2<T> operator - (const MDiagArray2<T>&,
const MDiagArray2<T>&);
template <typename T> MDiagArray2<T> product (const MDiagArray2<T>&,
const MDiagArray2<T>&);
//! Template for two dimensional diagonal array with math operators.
template <typename T>
class OCTAVE_API MDiagArray2 : public DiagArray2<T>
{
public:
MDiagArray2 () : DiagArray2<T> () { }
MDiagArray2 (octave_idx_type r, octave_idx_type c) : DiagArray2<T> (r, c) { }
MDiagArray2 (octave_idx_type r, octave_idx_type c, const T& val)
: DiagArray2<T> (r, c, val) { }
MDiagArray2 (const MDiagArray2<T>& a) : DiagArray2<T> (a) { }
MDiagArray2 (const DiagArray2<T>& a) : DiagArray2<T> (a) { }
template <typename U>
MDiagArray2 (const DiagArray2<U>& a) : DiagArray2<T> (a) { }
explicit MDiagArray2 (const Array<T>& a) : DiagArray2<T> (a) { }
MDiagArray2 (const Array<T>& a, octave_idx_type r, octave_idx_type c)
: DiagArray2<T> (a, r, c) { }
~MDiagArray2 () = default;
MDiagArray2<T>& operator = (const MDiagArray2<T>& a)
{
DiagArray2<T>::operator = (a);
return *this;
}
MArray<T> array_value () const
{
return DiagArray2<T>::array_value ();
}
octave_idx_type nnz () const
{
const T *d = this->data ();
octave_idx_type nel = this->length ();
static constexpr T zero = T ();
return std::count_if (d, d + nel,
[] (T elem) { return elem != zero; });
}
MArray<T> diag (octave_idx_type k = 0) const
{ return DiagArray2<T>::extract_diag (k); }
MDiagArray2<T> transpose () const { return DiagArray2<T>::transpose (); }
MDiagArray2<T> hermitian (T (*fcn) (const T&) = nullptr) const
{ return DiagArray2<T>::hermitian (fcn); }
OCTAVE_API bool is_multiple_of_identity (T val) const;
// Currently, the OPS functions don't need to be friends, but that
// may change.
friend OCTAVE_API MDiagArray2<T> operator + <> (const MDiagArray2<T>&);
friend OCTAVE_API MDiagArray2<T> operator - <> (const MDiagArray2<T>&);
friend OCTAVE_API MDiagArray2<T>
operator * <> (const MDiagArray2<T>&, const T&);
friend OCTAVE_API MDiagArray2<T>
operator / <> (const MDiagArray2<T>&, const T&);
friend OCTAVE_API MDiagArray2<T>
operator * <> (const T&, const MDiagArray2<T>&);
friend OCTAVE_API MDiagArray2<T>
operator + <> (const MDiagArray2<T>&, const MDiagArray2<T>&);
friend OCTAVE_API MDiagArray2<T>
operator - <> (const MDiagArray2<T>&, const MDiagArray2<T>&);
friend OCTAVE_API MDiagArray2<T>
product <> (const MDiagArray2<T>&, const MDiagArray2<T>&);
};
#define MDIAGARRAY2_FORWARD_DEFS(B, R, T) \
inline R \
operator + (const R& x) \
{ \
return R (operator + (dynamic_cast<const B<T>&> (x))); \
} \
inline R \
operator - (const R& x) \
{ \
return R (operator - (dynamic_cast<const B<T>&> (x))); \
} \
inline R \
operator * (const R& x, const T& y) \
{ \
return R (operator * (dynamic_cast<const B<T>&> (x), (y))); \
} \
inline R \
operator / (const R& x, const T& y) \
{ \
return R (operator / (dynamic_cast<const B<T>&> (x), (y))); \
} \
inline R \
operator * (const T& x, const R& y) \
{ \
return R (operator * ( (x), dynamic_cast<const B<T>&> (y))); \
} \
inline R \
operator + (const R& x, const R& y) \
{ \
return R (operator + (dynamic_cast<const B<T>&> (x), \
dynamic_cast<const B<T>&> (y))); \
} \
inline R \
operator - (const R& x, const R& y) \
{ \
return R (operator - (dynamic_cast<const B<T>&> (x), \
dynamic_cast<const B<T>&> (y))); \
} \
inline R \
product (const R& x, const R& y) \
{ \
return R (product (dynamic_cast<const B<T>&> (x), \
dynamic_cast<const B<T>&> (y))); \
}
#endif
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