/usr/include/linbox/blackbox/transpose.h is in liblinbox-dev 1.1.6~rc0-4.1.
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/* linbox/blackbox/transpose.h
* Copyright (C) 2001 Bradford Hovinen
*
* Written by Bradford Hovinen <hovinen@cis.udel.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __TRANSPOSE_H
#define __TRANSPOSE_H
#include <linbox/blackbox/blackbox-interface.h>
// Namespace in which all LinBox library code resides
namespace LinBox
{
/** \brief transpose matrix without copying.
\ingroup blackbox
* @param Vector \ref{LinBox} dense or sparse vector of field elements
*/
template <class Blackbox>
class Transpose : public BlackboxInterface
{
public:
typedef Blackbox Blackbox_t;
typedef Transpose<Blackbox> Self_t;
typedef typename Blackbox::Field Field;
typedef typename Blackbox::Element Element;
/** Constructor from a black box.
* This constructor creates a matrix that the transpose of a black box
* matrix A
* @param A_ptr pointer to black box matrix.
*/
Transpose (const Blackbox& A) : _A_ptr(&A){}
Transpose (const Blackbox *A_ptr): _A_ptr(A_ptr)
{
// create new copies of matrices in dynamic memory
//linbox_check (A_ptr != NULL);
//_A_ptr = A_ptr->clone ();
}
/** Copy constructor.
* Creates new black box objects in dynamic memory.
* @param M constant reference to compose black box matrix
*/
Transpose (const Transpose<Blackbox> &M) : _A_ptr(M._A_ptr)
{
// create new copies of matrices in dynamic memory
//linbox_check (M._A_ptr != NULL);
//_A_ptr = M._A_ptr->clone ();
}
/// Destructor
~Transpose (void)
{
}
template<typename _Tp1>
struct rebind
{
typedef Transpose<typename Blackbox::template rebind<_Tp1>::other> other;
void operator() (other *& Ap, const Self_t& A, const _Tp1& F) {
typename other::Blackbox_t * A1;
typename Blackbox_t::template rebind<_Tp1> () ( A1, *(A._A_ptr), F);
Ap = new other(A1);
}
};
/** Application of BlackBox matrix.
* y= (A*B)*x.
* Requires one vector conforming to the \ref{LinBox}
* vector {@link Archetypes archetype}.
* Required by abstract base class.
* @return reference to vector y containing output.
* @param x constant reference to vector to contain input
*/
template <class Vector1, class Vector2>
inline Vector1 &apply (Vector1 &y, const Vector2 &x) const
{
if (_A_ptr != 0) _A_ptr->applyTranspose (y, x);
return y;
}
/** Application of BlackBox matrix transpose.
* y= transpose(A*B)*x.
* Requires one vector conforming to the \ref{LinBox}
* vector {@link Archetypes archetype}.
* Required by abstract base class.
* @return reference to vector y containing output.
* @param x constant reference to vector to contain input
*/
template <class Vector1, class Vector2>
inline Vector1 &applyTranspose (Vector1 &y, const Vector2 &x) const
{
if (_A_ptr != 0) _A_ptr->apply (y, x);
return y;
}
/** Retreive row dimensions of BlackBox matrix.
* This may be needed for applying preconditioners.
* Required by abstract base class.
* @return integer number of rows of black box matrix.
*/
size_t rowdim (void) const
{
if (_A_ptr != 0)
return _A_ptr->coldim ();
else
return 0;
}
/** Retreive column dimensions of BlackBox matrix.
* Required by abstract base class.
* @return integer number of columns of black box matrix.
*/
size_t coldim (void) const
{
if (_A_ptr != 0)
return _A_ptr->rowdim ();
else
return 0;
}
const Field& field() const {return _A_ptr->field();}
private:
// Pointers to A and B matrices
const Blackbox *_A_ptr;
}; // template <Vector> class Transpose
} // namespace LinBox
#endif // __TRANSPOSE_H
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