examples/Polynomial/pol_factor.C

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// Copyright(c)'1994-2009 by The Givaro group
// This file is part of Givaro.
// Givaro is governed by the CeCILL-B license under French law
// and abiding by the rules of distribution of free software.
// see the COPYRIGHT file for more details.
#include <iostream>
#include <stdlib.h>
#include <givaro/gfq.h>
#include <givaro/givpoly1factor.h>
#include <givaro/givtimer.h>
using namespace std;
using namespace Givaro;
int main(int argc, char** argv)
{
GFqDom<int64_t>::Residu_t MOD;
if (argc > 1)
MOD = (GFqDom<int64_t>::Residu_t) atoi(argv[1]);
else
std::cin >> MOD;
uint64_t expo = 1;
if (argc > 2) expo = (uint64_t)atoi(argv[2]);
Timer tim2; tim2.clear(); tim2.start();
GFqDom<int64_t> F(MOD, expo);
tim2.stop();
std::cerr<<"init field -> "<<tim2.usertime()<<std::endl;
Poly1FactorDom<GFqDom<int64_t>, Dense> FD(F,Indeter("X"));
typedef Poly1FactorDom<GFqDom<int64_t>, Dense>::Element Polys ;
Polys P;
FD.read( cin, P );
std::vector<Polys> Lf;
std::vector<uint64_t> Le;
Timer tim; tim.clear(); tim.start();
FD.CZfactor(Lf, Le, P);
tim.stop();
FD.write( cout, P ) << " is 1";
std::vector<uint64_t>::const_iterator e = Le.begin();
for(std::vector<Polys>::const_iterator i = Lf.begin(); i != Lf.end(); ++i, ++e) {
FD.write(cout << " * (", *i) << ")";
if (*e > 1) cout << "^" << *e;
}
std::cout << std::endl;
std::cerr << tim << std::endl;
return 0;
}
/* -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
// vim:sts=4:sw=4:ts=4:et:sr:cino=>s,f0,{0,g0,(0,\:0,t0,+0,=s
Givaro::GFqDom
class GFqDom
Definition gfq.h:44
Givaro::Indeter
Indeterminate.
Definition givindeter.h:24
Givaro::Poly1FactorDom
Poly1FactorDom.
Definition givpoly1factor.h:34
Givaro::Timer
Timer.
Definition givtimer.h:129
Givaro::Timer::start
void start()
Start timer.
Definition givtimer.C:164
Givaro::Timer::stop
void stop()
Stop timer.
Definition givtimer.C:172
Givaro::Timer::clear
void clear()
Clear timer.
Definition givtimer.C:155
Givaro::Timer::usertime
double usertime() const
total amount of second spent in user mode.
Definition givtimer.h:165
Givaro
Namespace in which the whole Givaro library resides.
Definition all_field.C:23
std
STL namespace.