75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
/*
|
|
LA: linear algebra C++ interface library
|
|
Copyright (C) 2021 Jiri Pittner <jiri.pittner@jh-inst.cas.cz> or <jiri@pittnerovi.com>
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "polynomial.h"
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
|
|
namespace LA {
|
|
|
|
template <typename T>
|
|
void Polynomial<T>::polydiv(const Polynomial &rhs, Polynomial &q, Polynomial &r) const
|
|
{
|
|
if(rhs[rhs.degree()]==(T)0) laerror("division by a polynomial with zero leading coefficient - simplify it first");
|
|
if(rhs.degree()==0) //scalar division
|
|
{
|
|
q= *this/rhs[0];
|
|
r.resize(0,false);
|
|
r[0]=0;
|
|
return;
|
|
}
|
|
int rdegree= rhs.degree();
|
|
int qdegree= degree()-rdegree;
|
|
if(qdegree<0)
|
|
{
|
|
q.resize(0,false);
|
|
q[0]=0;
|
|
r= *this;
|
|
return;
|
|
}
|
|
//general case
|
|
q.resize(qdegree,false);
|
|
r= *this; r.copyonwrite();
|
|
for(int i=degree(); i>=rdegree; --i)
|
|
{
|
|
T tmp= r[i]/rhs[rdegree];
|
|
q[i-rdegree]= tmp;
|
|
r -= rhs.shifted(i-rdegree)*tmp;
|
|
}
|
|
r.resize(rhs.degree()-1,true);
|
|
}
|
|
|
|
|
|
/***************************************************************************//**
|
|
* forced instantization in the corresponding object file
|
|
******************************************************************************/
|
|
template class Polynomial<int>;
|
|
template class Polynomial<double>;
|
|
template class Polynomial<std::complex<double> >;
|
|
|
|
#define INSTANTIZE(T) \
|
|
|
|
|
|
|
|
//INSTANTIZE(double)
|
|
|
|
|
|
|
|
}//namespace
|