/usr/include/CGAL/Gmpq.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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 | // Copyright (c) 2006-2008 Max-Planck-Institute Saarbruecken (Germany).
// All rights reserved.
//
// 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(s) : Michael Hemmer <hemmer@mpi-inf.mpg.de>
#ifndef CGAL_GMPQ_H
#define CGAL_GMPQ_H
#include <CGAL/number_type_basic.h>
#include <CGAL/Gmpz.h>
#include <CGAL/Gmp_coercion_traits.h>
namespace CGAL {
// AST for Gmpq-class
template <> class Algebraic_structure_traits< Gmpq >
: public Algebraic_structure_traits_base< Gmpq, Field_tag > {
public:
typedef Tag_true Is_exact;
typedef Tag_false Is_numerical_sensitive;
class Is_square
: public std::binary_function< Type, Type&,
bool > {
public:
bool operator()( const Type& x_, Type& y ) const {
Gmpq x( x_ );
mpq_canonicalize( x.mpq() );
Algebraic_structure_traits< Gmpz >::Sqrt sqrt;
y = Gmpq( sqrt( x.numerator() ), sqrt( x.denominator() ) );
return y*y == x;
}
bool operator()( const Type& x) const {
Type y;
return operator()(x,y);
}
};
class Simplify
: public std::unary_function< Type&, void > {
public:
void operator()( Type& x) const {
mpq_canonicalize( x.mpq() );
}
};
};
// RET for Gmpq-class
template <> class Real_embeddable_traits< Gmpq >
: public INTERN_RET::Real_embeddable_traits_base< Gmpq , CGAL::Tag_true > {
public:
class Sgn
: public std::unary_function< Type, ::CGAL::Sign > {
public:
::CGAL::Sign operator()( const Type& x ) const {
return x.sign();
}
};
class To_double
: public std::unary_function< Type, double > {
public:
double operator()( const Type& x ) const {
return x.to_double();
}
};
class To_interval
: public std::unary_function< Type, std::pair< double, double > > {
public:
std::pair<double, double> operator()( const Type& x ) const {
mpfr_t y;
mpfr_init2 (y, 53); /* Assume IEEE-754 */
mpfr_set_q (y, x.mpq(), GMP_RNDD);
double i = mpfr_get_d (y, GMP_RNDD); /* EXACT but can overflow */
mpfr_set_q (y, x.mpq(), GMP_RNDU);
double s = mpfr_get_d (y, GMP_RNDU); /* EXACT but can overflow */
mpfr_clear (y);
return std::pair<double, double>(i, s);
}
};
};
/*! \ingroup NiX_Fraction_traits_spec
* \brief Specialization of Fraction_traits for Gmpq
*/
template <>
class Fraction_traits< Gmpq > {
public:
typedef Gmpq Type;
typedef ::CGAL::Tag_true Is_fraction;
typedef Gmpz Numerator_type;
typedef Gmpz Denominator_type;
typedef Algebraic_structure_traits< Gmpz >::Gcd Common_factor;
class Decompose {
public:
typedef Gmpq first_argument_type;
typedef Gmpz& second_argument_type;
typedef Gmpz& third_argument_type;
void operator () (const Gmpq& rat, Gmpz& num,Gmpz& den) {
num = rat.numerator();
den = rat.denominator();
}
};
class Compose {
public:
typedef Gmpz first_argument_type;
typedef Gmpz second_argument_type;
typedef Gmpq result_type;
Gmpq operator () (const Gmpz& num,const Gmpz& den) {
return Gmpq(num, den);
}
};
};
} //namespace CGAL
namespace Eigen {
template<class> struct NumTraits;
template<> struct NumTraits<CGAL::Gmpq>
{
typedef CGAL::Gmpq Real;
typedef CGAL::Gmpq NonInteger;
typedef CGAL::Gmpq Nested;
static inline Real epsilon() { return 0; }
enum {
IsInteger = 0,
IsSigned = 1,
IsComplex = 0,
RequireInitialization = 1,
ReadCost = 6,
AddCost = 150,
MulCost = 100
};
};
}
//since types are included by Gmp_coercion_traits.h:
#include <CGAL/Gmpz.h>
#include <CGAL/Gmpq.h>
#include <CGAL/Gmpzf.h>
#include <CGAL/GMP_arithmetic_kernel.h>
#endif // CGAL_GMPQ_H
|