mirror of https://github.com/CGAL/cgal
163 lines
4.4 KiB
C++
163 lines
4.4 KiB
C++
// Copyright (c) 1997 Utrecht University (The Netherlands),
|
|
// ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
|
|
// INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
|
|
// (Germany), Max-Planck-Institute Saarbruecken (Germany), RISC Linz (Austria),
|
|
// and Tel-Aviv University (Israel). 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; version 2.1 of the License.
|
|
// See the file LICENSE.LGPL distributed with CGAL.
|
|
//
|
|
// 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 Hoffmann <hoffmann@inf.ethz.ch>
|
|
|
|
// to be included by number_utils.h
|
|
|
|
#ifndef CGAL_NUMBER_UTILS_CLASSES_H
|
|
#define CGAL_NUMBER_UTILS_CLASSES_H 1
|
|
|
|
#include <CGAL/number_type_basic.h>
|
|
#include <algorithm>
|
|
#include <utility>
|
|
|
|
CGAL_BEGIN_NAMESPACE
|
|
|
|
/* Defines functors:
|
|
- Is_zero
|
|
- Is_one
|
|
- Is_negative
|
|
- Is_positive
|
|
- Sgn
|
|
- Abs
|
|
- Compare
|
|
- Square
|
|
- Sqrt
|
|
- Div
|
|
- Gcd
|
|
- To_double
|
|
- To_interval
|
|
*/
|
|
template < class NT > struct Is_zero;
|
|
template < class NT > struct Is_one;
|
|
template < class NT > struct Is_negative;
|
|
template < class NT > struct Is_positive;
|
|
template < class NT > struct Sgn;
|
|
template < class NT > struct Abs;
|
|
template < class NT > struct Compare;
|
|
template < class NT > struct Square;
|
|
template < class NT > struct Sqrt;
|
|
template < class NT > struct Div;
|
|
template < class NT > struct Gcd;
|
|
template < class NT > struct To_double;
|
|
template < class NT > struct To_interval;
|
|
|
|
|
|
// TODO: All the following functors have to be removed since we allready have
|
|
// them in the Real_embeddable_traits.
|
|
template < class NT >
|
|
struct Is_zero :public Unary_function< NT, bool > {
|
|
bool operator()( const NT& x) const
|
|
{ return CGAL_NTS is_zero( x); }
|
|
};
|
|
|
|
template < class NT >
|
|
struct Is_one :public Unary_function< NT, bool > {
|
|
bool operator()( const NT& x) const
|
|
{ return CGAL_NTS is_one( x); }
|
|
};
|
|
|
|
template < class NT >
|
|
struct Is_negative :public Unary_function< NT, bool > {
|
|
bool operator()( const NT& x) const
|
|
{ return CGAL_NTS is_negative( x); }
|
|
};
|
|
|
|
template < class NT >
|
|
struct Is_positive :public Unary_function< NT, bool > {
|
|
bool operator()( const NT& x) const
|
|
{ return CGAL_NTS is_positive( x); }
|
|
};
|
|
|
|
|
|
// Sign would result in a name clash with enum.h
|
|
template < class NT >
|
|
struct Sgn :public Unary_function< NT, Sign > {
|
|
Sign operator()( const NT& x) const
|
|
{ return CGAL_NTS sign( x); }
|
|
};
|
|
template < class NT >
|
|
struct Abs :public Unary_function< NT, NT > {
|
|
NT operator()( const NT& x) const
|
|
{ return CGAL_NTS abs( x); }
|
|
};
|
|
|
|
template <class NT, class Compare> struct Compare_base: public Compare {};
|
|
template <class NT> struct Compare_base<NT,Null_functor>
|
|
:public Binary_function< NT, NT, Comparison_result > {
|
|
Comparison_result operator()( const NT& x, const NT& y) const
|
|
{
|
|
if (x < y) return SMALLER;
|
|
if (x > y) return LARGER;
|
|
CGAL_postcondition(x == y);
|
|
return EQUAL;
|
|
}
|
|
};
|
|
|
|
|
|
template < class NT >
|
|
struct Compare
|
|
:public Compare_base<NT, typename Real_embeddable_traits<NT>::Compare>{};
|
|
|
|
template < class NT >
|
|
struct Square : public Unary_function< NT, NT > {
|
|
NT operator()( const NT& x) const
|
|
{ return CGAL_NTS square( x ); }
|
|
};
|
|
|
|
template < class NT >
|
|
struct Sqrt : public Unary_function< NT, NT > {
|
|
NT operator()( const NT& x) const
|
|
{ return CGAL_NTS sqrt( x ); }
|
|
};
|
|
|
|
template < class NT >
|
|
struct Div : public Binary_function< NT, NT, NT > {
|
|
NT operator()( const NT& x, const NT& y) const
|
|
{ return CGAL_NTS div( x, y ); }
|
|
};
|
|
|
|
template < class NT >
|
|
struct Gcd : public Binary_function< NT, NT, NT > {
|
|
NT operator()( const NT& x, const NT& y) const
|
|
{ return CGAL_NTS gcd( x, y ); }
|
|
};
|
|
|
|
template < class NT >
|
|
struct To_double : public Unary_function< NT, double > {
|
|
double operator()( const NT& x) const
|
|
{ return CGAL_NTS to_double( x ); }
|
|
};
|
|
|
|
template < class NT >
|
|
struct To_interval
|
|
: public Unary_function< NT, std::pair<double, double> >
|
|
{
|
|
std::pair<double, double> operator()( const NT& x) const
|
|
{ return CGAL_NTS to_interval( x ); }
|
|
};
|
|
|
|
|
|
CGAL_END_NAMESPACE
|
|
|
|
#endif // CGAL_NUMBER_UTILS_CLASSES_H
|