/usr/include/CGAL/RS/solve_1.h is in libcgal-dev 4.2-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// This file is part of CGAL (www.cgal.org); 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 3 of the License,
// or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
//
// Author: Luis Peñaranda <luis.penaranda@gmx.com>
#ifndef CGAL_RS_SOLVE_1_H
#define CGAL_RS_SOLVE_1_H
#include <CGAL/basic.h>
#include <CGAL/RS/basic.h>
#include <CGAL/RS/dyadic.h>
#include <CGAL/RS/polynomial_1.h>
#include <CGAL/RS/algebraic_1.h>
#include <CGAL/RS/rs_calls_1.h>
#include <CGAL/Gmpfi.h>
#include <vector>
namespace CGAL{
class RS_polynomial_1;
class Algebraic_1;
// solve given the precision, returns the number of roots
inline int solve_1(mpfi_ptr *x,
const RS_polynomial_1 &p1,
unsigned int prec=CGAL_RS_DEF_PREC){
rs_reset_all();
create_rs_upoly(p1.get_coefs(),p1.get_degree(),rs_get_default_up());
set_rs_precisol(prec);
set_rs_verbose(CGAL_RS_VERB);
rs_run_algo(CGALRS_CSTR("UISOLE"));
return affiche_sols_eqs(x);
}
// calculate the sign of a polynomial evaluated at the root of another
inline Sign sign_1_rs(const RS_polynomial_1 &p1,
const Algebraic_1 &a,
unsigned int prec=CGAL_RS_MIN_PREC){
mpz_t **constr;
int *degs;
CGAL_assertion(a.is_consistent());
rs_reset_all ();
// tell RS to find the roots of this polynomial
create_rs_upoly (a.pol().get_coefs (), a.pol().get_degree (),
rs_get_default_up ());
// the constraint vector will have just one element
constr = (mpz_t**)malloc(sizeof(mpz_t*));
*constr = p1.get_coefs ();
degs = (int*)malloc(sizeof(int));
*degs = p1.get_degree ();
create_rs_uconstr (constr, degs, rs_get_default_ineqs_u ());
set_rs_precisol (prec);
set_rs_verbose (CGAL_RS_VERB);
rs_run_algo(CGALRS_CSTR("UISOLES"));
return affiche_signs_constr(a.nr());
}
} // namespace CGAL
#endif // CGAL_RS_SOLVE_1_H
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