85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
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// Copyright (c) 2006-2008 Max-Planck-Institute Saarbruecken (Germany).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 3 of the License,
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// or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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// SPDX-License-Identifier: LGPL-3.0+
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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_SQRT_EXTENSION_MODULAR_TRAITS_H
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#define CGAL_SQRT_EXTENSION_MODULAR_TRAITS_H
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#include <CGAL/basic.h>
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#include <CGAL/Residue.h>
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#include <CGAL/Modular_traits.h>
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namespace CGAL {
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/////////// MODULAR_TRAITS BEGIN
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template< class COEFF, class ROOT, class ACDE_TAG, class FP_TAG>
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class Modular_traits< Sqrt_extension<COEFF,ROOT,ACDE_TAG,FP_TAG> > {
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private:
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typedef Sqrt_extension<COEFF,ROOT,ACDE_TAG,FP_TAG> EXT;
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typedef Modular_traits<COEFF> MT_COEFF;
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typedef Modular_traits<ROOT> MT_ROOT;
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typedef typename MT_COEFF::Residue_type Residue_type_coeff;
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typedef typename MT_ROOT::Residue_type Residue_type_root;
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public:
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typedef EXT NT;
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typedef typename MT_COEFF::Is_modularizable Is_modularizable;
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typedef Sqrt_extension<Residue_type_coeff, Residue_type_root, ACDE_TAG,FP_TAG> Residue_type;
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struct Modular_image{
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Residue_type operator()(const EXT& a){
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typename MT_ROOT::Modular_image mod_image_root;
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typename MT_COEFF::Modular_image mod_image_coeff;
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Residue_type_root root_mod = mod_image_root(a.root());
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if(root_mod != Residue_type_root(0)){
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return Residue_type(mod_image_coeff(a.a0()),
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mod_image_coeff(a.a1()),
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root_mod);
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}else{
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return Residue_type(mod_image_coeff(a.a0()));
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}
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}
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};
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struct Modular_image_representative{
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NT operator()(const Residue_type& a){
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typename MT_ROOT::Modular_image_representative mod_image_inv_root;
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typename MT_COEFF::Modular_image_representative mod_image_inv_coeff;
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if(a.is_extended()){
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return NT(
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mod_image_inv_coeff(a.a0()),
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mod_image_inv_coeff(a.a1()),
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mod_image_inv_root(a.root()));
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}else{
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return NT(mod_image_inv_coeff(a.a0()));
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}
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}
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};
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};
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/////////// MODULAR_TRAITS END
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} //namespace CGAL
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#endif
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