qrp.h

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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1994-2025 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.
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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////////////////////////////////////////////////////////////////////////
 
#if ! defined (octave_qrp_h)
#define octave_qrp_h 1
 
#include "octave-config.h"
 
#include "PermMatrix.h"
#include "qr.h"
 
OCTAVE_BEGIN_NAMESPACE(octave)
 
OCTAVE_BEGIN_NAMESPACE(math)
 
template <typename T>
class qrp : public qr<T>
{
public:
 
  typedef typename T::real_row_vector_type RV_T;
 
  typedef typename qr<T>::type type;
 
  qrp () : qr<T> (), m_p () { }
 
  OCTAVE_API qrp (const T&, type = qr<T>::std);
 
  qrp (const qrp& a) : qr<T> (a), m_p (a.m_p) { }
 
  qrp& operator = (const qrp& a)
  {
    if (this != &a)
      {
        qr<T>::operator = (a);
        m_p = a.m_p;
      }
 
    return *this;
  }
 
  ~qrp () = default;
 
  OCTAVE_API void init (const T&, type = qr<T>::std);
 
  PermMatrix P () const { return m_p; }
 
  OCTAVE_API RV_T Pvec () const;
 
private:
 
  PermMatrix m_p;
};
 
OCTAVE_END_NAMESPACE(math)
OCTAVE_END_NAMESPACE(octave)
 
#endif