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* Copyright (C) 1999-2005 William J Turner,
* 2001 Bradford Hovinen
* 2005 Clement Pernet
*
* Written by W. J. Turner <wjturner@acm.org>,
* Bradford Hovinen <hovinen@cis.udel.edu>
*
* ========LICENCE========
* This file is part of the library LinBox.
*
* LinBox 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 2.1 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* ========LICENCE========
*/
#ifndef __LINBOX_field_unparametric_H
#define __LINBOX_field_unparametric_H
#include <typeinfo>
#include <string>
#include <algorithm>
#include "linbox/linbox-config.h"
#include "linbox/integer.h"
#include "linbox/field/field-interface.h"
#include "linbox/randiter/unparametric.h"
#include "linbox/field/field-traits.h"
#include <fflas-ffpack/field/unparametric.h>
#include "linbox/randiter/nonzero.h"
//#if __LINBOX_HAVE_NTL
//#include "linbox/field/ntl-RR.h"
//#endif // __LINBOX_HAVE_NTL
namespace LinBox
{
using Givaro::Caster;
#if 0
#if __LINBOX_HAVE_NTL
typedef NTL::RR Targ;
template <>
Targ& Caster<Targ, int> (Targ& t, const int& s)
{
return t = s;
}
#endif // __LINBOX_HAVE_NTL
#endif
template <class Ring>
struct ClassifyRing;
template <class K>
class UnparametricField;
// using FFPACK::UnparametricField ;
using FFPACK::UnparametricOperations;
template <class K>
struct ClassifyRing<UnparametricField<K> > {
typedef RingCategories::GenericTag categoryTag;
};
template <>
struct ClassifyRing<UnparametricField<integer> > {
typedef RingCategories::IntegerTag categoryTag;
};
/** \brief Unparameterized field adapter.
* \ingroup field
* \defgroup UnparametricField UnparametricField
*
* A field having an interface similar to that of floats is adapted to
* LinBox.
*
* Used to generate efficient field classes for unparameterized fields
* (or hidden parameter fields).
*
* Some fields are implemented by definition of the C++ arithmetic
* operators, such as <code>z = x*y</code>, for \c x, \c y, \c z
* instances of a type \c K. The LinBox field LinBox::Unparametric<K>
* is the adaptation to LinBox.
*
* For a typical unparametric field, some of the methods must be
* defined in a specialization.
*/
template <class K>
class UnparametricField : public FieldInterface,
public FFPACK::UnparametricField<K> {
protected:
integer _p; integer _card;
public:
typedef typename FFPACK::UnparametricField<K> Father_t ;
/** @name Common Object Interface for a LinBox Field.
* These methods and member types are required of all LinBox fields.
* See \ref FieldArchetype for detailed specifications.
*/
//@{
/** The field's element type.
* Type K must provide a default constructor,
* a copy constructor, a destructor, and an assignment operator.
*/
typedef K Element;
/// Type of random field element generators.
typedef UnparametricRandIter<K> RandIter;
/** @name Field Object Basics.
*/
//@{
/** Builds this field to have characteristic q and cardinality q<sup>e</sup>.
* This constructor must be defined in a specialization.
*/
UnparametricField(integer q = 0, size_t e = 1) :
Father_t(q, e),
//Father_t((unsigned long)q,(unsigned long)e)
_p(q),
_card(q == 0 ?
integer(-1) :
pow(q, e) )
{} // assuming q is a prime or zero.
/// construct this field as copy of F.
UnparametricField (const UnparametricField &F) :
Father_t(F),_p(F._p), _card(F._card)
{}
// field/ntl-ZZ_p.h me les demande... //
using Father_t::inv ;
//using Father_t::read ;
std::istream &read(std::istream & is) { return Father_t::read(is); }
std::istream &read(std::istream & s, Element &a) const
{
Integer tmp;
s >> tmp;
init(a, tmp);
return s;
}
using Father_t::invin;
using Father_t::write;
using Father_t::isZero;
using Father_t::isOne;
template<typename Src>
Element&init(Element&x, const Src&s) const
{
return Caster (x, s);
}
Element&init(Element&x)const
{
return Caster (x, 0);
}
template<typename T>
T&convert(T&x, const Element&y) const
{
return Caster(x,y);
}
// fin des trucs zarbs //
/// c := cardinality of this field (-1 if infinite).
using Father_t::cardinality ;
integer &cardinality (integer &c) const
{
return c = _card;
}
/// c := characteristic of this field (zero or prime).
using Father_t::characteristic;
integer &characteristic (integer &c) const
{
return c = _p;
}
//@} Data Object Management
//@} Common Object Interface
/** @name Implementation-Specific Methods.
* These methods are not required of all LinBox fields
* and are included only for the implementation of this field
* template.
*/
//@{
//- Default constructor
//UnparametricField (void) {}
/** Constructor from field object.
* @param A unparameterized field object
*/
UnparametricField (const K &A) {}
/** Constant access operator.
* @return constant reference to field object
*/
const K &operator () (void) const
{
return Element ();
}
/** Access operator.
* @return reference to field object
*/
K &operator () (void)
{
return Element ();
}
//@} Implementation-Specific Methods
}; // template <class K> class UnparametricField
template<class Field>
class FieldAXPY;
/*! @ingroup integers
* @brief NO DOc
*/
template<>
class FieldAXPY<UnparametricField<integer> > {
public:
typedef UnparametricField<integer> Field;
typedef integer Element;
/** Constructor.
* A faxpy object if constructed from a Field and a field element.
* Copies of this objects are stored in the faxpy object.
* @param F field F in which arithmetic is done
*/
FieldAXPY (const Field &F) :
_field (F)
{ _y = 0; }
/** Copy constructor.
* @param faxpy
*/
FieldAXPY (const FieldAXPY<Field> &faxpy) :
_field (faxpy._field), _y (faxpy._y)
{}
/** Assignment operator
* @param faxpy
*/
FieldAXPY<Field> &operator = (const FieldAXPY &faxpy)
{ _y = faxpy._y; return *this; }
/** Add a*x to y
* y += a*x.
* @param a constant reference to element a
* @param x constant reference to element x
* allow optimal multiplication, such as integer * int
*/
template<class Element1>
inline Element& mulacc (const Element &a, const Element1 &x)
{
return _y += (a * x);
}
template<class Element1>
inline Element& accumulate (const Element1 &t)
{
return _y += t;
}
/** Retrieve y
*
* Performs the delayed modding out if necessary
*/
inline Element &get (Element &y) { y = _y; return y; }
/** Assign method.
* Stores new field element for arithmetic.
* @return reference to self
* @param y constant reference to element a
*/
inline FieldAXPY &assign (const Element& y)
{
_y = y;
return *this;
}
inline void reset() {
_y = 0;
}
private:
/// Field in which arithmetic is done
Field _field;
/// Field element for arithmetic
Element _y;
};
} // namespace LinBox
#include "linbox/randiter/unparametric.h"
#endif // __LINBOX_field_unparametric_H
// Local Variables:
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// End:
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