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/* lb-polynomial.C
* Copyright (C) 2005 Pascal Giorgi
*
* Written by Pascal Giorgi <pgiorgi@uwaterloo.ca>
*
* ========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_lb_polynomial_C
#define __LINBOX_lb_polynomial_C
#include <lb-domain-collection.h>
#include <lb-domain-function.h>
#include <lb-vector-collection.h>
#include <lb-vector-function.h>
#include <lb-polynomial.h>
/***********************************************
* Polynomial are handled through dense vector *
***********************************************/
// nothing to do at this stage
/*************************************************************
* API to write a polynomial over the standard output stream *
*************************************************************/
template<class Element, class VElement>
class PrintPoly{
public:
template< class Domain, class Poly>
void operator()(Domain *D, Poly *poly, std::ostream &os){
throw lb_runtime_error("LinBox ERROR: incompatible type (polynomial writing impossible)\n");
}
};
template<class Element>
class PrintPoly<Element, Element> {
public:
template< class Domain, class Poly, class Out>
void operator()(Domain *D, Poly *poly, Out &os){
size_t deg=poly->size()-1;
while (D->isZero((*poly)[deg])) --deg;
D->write(os,(*poly)[deg])<<".x^"<<deg;
for (int i= (int)deg-1; i > 1 ; --i) {
if (!D->isZero((*poly)[i])){os<<" + ";D->write(os, (*poly)[i])<<".x^"<<i;}
}
if (deg > 1)
if (!D->isZero((*poly)[1])){os<<" + ";D->write(os,(*poly)[1])<<".x";}
if (deg > 0)
if (!D->isZero((*poly)[0])){os<<" + ";D->write(os,(*poly)[0]);}
os<<"\n";
}
};
template<class Polynomial>
class WritePolynomialSpecFunctor{
protected:
std::ostream &os;
Polynomial *poly;
public:
WritePolynomialSpecFunctor(std::ostream &o, Polynomial *P) : os(o), poly(P){}
template<class Domain>
void operator()(void *&, Domain *D) const {
PrintPoly<typename Domain::Element, typename Polynomial::value_type> ()(D, poly, os);
}
};
class WritePolynomialFunctor{
protected:
std::ostream &os;
const PolynomialKey &key;
public:
WritePolynomialFunctor(std::ostream &o, const PolynomialKey &k) : os(o), key(k) {}
template<class Polynomial>
void operator() (void*, Polynomial *P) const {
VectorTable::iterator it = vector_hashtable.find(key);
if ( it == vector_hashtable.end())
throw lb_runtime_error("LinBox ERROR: invalid polynomial (writing impossible)");
WritePolynomialSpecFunctor<Polynomial> Fct(os,P);
DomainFunction::call(it->second->getDomainKey(), Fct);
}
};
void writePolynomial (const PolynomialKey &key, std::ostream &os){
WritePolynomialFunctor Fct(os, key);
VectorFunction::call(key, Fct);
}
/**********************************
* API to serialize a polynomial *
**********************************/
template <class PElement, class DElement>
class ToSerialPolynomial {
public:
template<class Domain, class Polynomial>
inline void operator()(SerialPolynomial &s, Domain *D, Polynomial *poly){
throw lb_runtime_error("LinBox ERROR: incompatible type (polynomial writing impossible)\n");
}
};
template<class Element>
class ToSerialPolynomial<Element, Element>{
public:
template<class Domain, class Polynomial>
inline void operator()(SerialPolynomial &s, Domain *D, Polynomial *poly){
s.type = "integer";
s.list.resize(poly->size());
typename Polynomial::const_iterator it_P= poly->begin();
std::vector<LinBox::integer>::iterator it_s= s.list.begin();
for (; it_P != poly->end(); ++it_P, ++it_s)
D->convert(*it_s, *it_P);
}
};
template<class Polynomial>
class SerializePolynomialSpecFunctor{
protected:
Polynomial *poly;
public:
SerializePolynomialSpecFunctor(Polynomial *P) : poly(P){}
template<class Domain>
void operator()(SerialPolynomial &s, Domain *D) const {
ToSerialPolynomial<typename Polynomial::value_type, typename Domain::Element>()(s, D, poly);
}
};
class SerializePolynomialFunctor{
protected:
const PolynomialKey &key;
public:
SerializePolynomialFunctor(const PolynomialKey &k) : key(k) {}
template<class Polynomial>
void operator() (SerialPolynomial& s, Polynomial *P) const {
VectorTable::iterator it = vector_hashtable.find(key);
if ( it == vector_hashtable.end())
throw lb_runtime_error("LinBox ERROR: invalid polynomial (serializing impossible)");
SerializePolynomialSpecFunctor<Polynomial> Fct(P);
DomainFunction::call(s, it->second->getDomainKey(), Fct);
}
};
void SerializePolynomial (SerialPolynomial &s, const PolynomialKey &key) {
SerializePolynomialFunctor Fct(key);
VectorFunction::call(s, key, Fct);
}
#endif
// Local Variables:
// mode: C++
// tab-width: 4
// indent-tabs-mode: nil
// c-basic-offset: 4
// End:
// vim:sts=4:sw=4:ts=4:et:sr:cino=>s,f0,{0,g0,(0,\:0,t0,+0,=s
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