/usr/include/linbox/algorithms/blackbox-container-base.h is in liblinbox-dev 1.1.6~rc0-4.1.
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/* linbox/algorithms/blackbox-container.h
* Copyright (C) 1999, 2001 Jean-Guillaume Dumas
*
* Written by Jean-Guillaume Dumas <Jean-Guillaume.Dumas@imag.fr>
*
* 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.
*/
// ================================================================
// LinBox Project 1999
// Base ForwardIterator wrapper for BlackBoxes
// Have to be provided :
// - launch : launches the following computation
// - wait : waits for the end of the current computation
// Time-stamp: <26 May 00 17:38:58 Jean-Guillaume.Dumas@imag.fr>
// ================================================================
#ifndef __BLACKBOX_CONTAINER_BASE_H
#define __BLACKBOX_CONTAINER_BASE_H
#include "linbox/vector/vector-domain.h"
namespace LinBox
{
#ifndef MIN
# define MIN(a,b) ((a)<(b)?(a):(b))
#endif
/** \brief A base class for BlackboxContainer.
* The primary member function is begin().
* It returns an iterator which after i increments (++) dereferences to
* $v^T A^i u$, for $v$ and $u$ determined by the form of construction.
* It is designed to be used with implementations of Berlekamp-Massey
* such as MasseyDom.
*
* Subclasses complete the implementation by defining _launch() and _wait().
*/
template<class Field, class Blackbox>
class BlackboxContainerBase {
public:
typedef typename Field::Element Element;
//-- Constructors
BlackboxContainerBase () {}
BlackboxContainerBase (const Blackbox *BB, const Field &F)
: _F (F), _VD (F), _BB (BB), _size (MIN (BB->rowdim (), BB->coldim ())) { _size <<= 1; }
// Pascal Giorgi 16.02.2004
BlackboxContainerBase (const Blackbox *BB, const Field &F, unsigned long size)
: _F (F), _VD (F), _BB (BB), _size (size) {}
virtual ~BlackboxContainerBase ()
{ }//delete _BB; }
class const_iterator {
BlackboxContainerBase<Field, Blackbox> &_c;
public:
const_iterator () {}
const_iterator (BlackboxContainerBase<Field, Blackbox> &C) : _c (C) {}
const_iterator &operator ++ () { _c._launch (); return *this; }
const Element &operator * () { _c._wait (); return _c.getvalue (); }
};
const_iterator begin () { return const_iterator (*this); }
const_iterator end () { return const_iterator (); }
long size () const { return _size; }
const Field &getField () const { return _F; }
Blackbox *getBB () const { return _BB; }
protected:
friend class const_iterator;
/** Launches a process to do the computation of the next sequence
* value: $v^T A^{i+1} u$. ...or just does it.
*/
virtual void _launch() = 0;
/** If a separate process is computing the next value of $v^T A^{i+1} u$,
* _wait() blocks until the value is ready.
*/
virtual void _wait() = 0;
//--------------
/// Members
//--------------
Field _F;
VectorDomain<Field> _VD;
const Blackbox *_BB;
long _size;
// BDS 22.03.03
long casenumber;
std::vector<Element> u, v;
Element _value;
const Element &getvalue() { return _value; }
//--------------
/// Initializers
//--------------
/// User Left and Right vectors
template<class Vector1, class Vector2>
Element &init (const Vector1& uu, const Vector2& vv) {
casenumber = 1;
u.resize(uu.size());
std::copy(uu.begin(),uu.end(),u.begin());
//u = uu;
v.resize(vv.size());
std::copy(vv.begin(),vv.end(),v.begin());
//v = vv;
// JGD 22.03.03
// return _VD.dot (_value, u, u);
return _VD.dot (_value, u, v);
}
/// Random Left vectors, Zero Right vector
template<class RandIter>
Element &init (RandIter& g)
{
casenumber = 1;
u.resize (_BB->coldim ());
for (long i = u.size (); i--;)
g.random (u[i]);
v.resize (_BB->rowdim ());
return _VD.dot (_value, u, u);
}
/// User Left vectors, Zero Right vector
template<class Vector>
Element &init (const Vector& uu) {
casenumber = 1;
u.resize(uu.size());
std::copy(uu.begin,uu.end(),u.begin());
v.resize (_BB->rowdim ());
return _VD.dot (_value, u, u);
}
};
}
#endif // __BLACKBOX_CONTAINER_BASE_H
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