67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
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// Copyright (c) 2008 Max-Planck-Institute Saarbruecken (Germany)
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//
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// This file is part of CGAL (www.cgal.org)
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//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/Polynomial/include/CGAL/Polynomial/Chinese_remainder_traits.h $
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// $Id: Chinese_remainder_traits.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
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// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
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//
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//
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// Author(s) : Michael Hemmer <hemmer@mpi-inf.mpg.de>
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#ifndef CGAL_POLYNOMIAL_CHINESE_REMAINDER_TRAITS
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#define CGAL_POLYNOMIAL_CHINESE_REMAINDER_TRAITS
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#include <CGAL/basic.h>
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#include <CGAL/Chinese_remainder_traits.h>
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#include <CGAL/Polynomial/Polynomial_type.h>
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namespace CGAL {
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template <class NT>
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class Chinese_remainder_traits<Polynomial<NT> >{
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public:
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typedef Polynomial<NT> Type;
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typedef Chinese_remainder_traits<NT> CRT_NT;
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typedef typename CRT_NT::Scalar_type Scalar_type;
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struct Chinese_remainder{
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void operator()(
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const Scalar_type& m1, const Scalar_type& m2,
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const Scalar_type& m,
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const Scalar_type& s, const Scalar_type& t,
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const Type& u1, const Type& u2,
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Type& u) const {
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typename CRT_NT::Chinese_remainder chinese_remainder_nt;
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CGAL_precondition(u1.degree() == u2.degree());
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std::vector<NT> coeffs(u1.degree()+1);
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for(int i = 0; i <= u1.degree(); i++){
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NT c;
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chinese_remainder_nt(m1,m2,m,s,t,u1[i],u2[i],c);
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coeffs[i] = c;
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}
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u = Polynomial<NT>(coeffs.begin(),coeffs.end());
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}
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void operator()(
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const Scalar_type& m1, const Type& u1,
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const Scalar_type& m2, const Type& u2,
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Scalar_type& m, Type& u) const {
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Scalar_type s,t;
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CGAL::extended_euclidean_algorithm(m1,m2,s,t);
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m = m1 * m2;
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this->operator()(m1,m2,m,s,t,u1,u2,u);
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}
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};
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};
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} // namespace CGAL
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#endif // CGAL_POLYNOMIAL_CHINESE_REMAINDER_TRAITS
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