mirror of https://github.com/CGAL/cgal
83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
// Copyright (c) 1997 Utrecht University (The Netherlands),
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// ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
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// INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
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// (Germany), Max-Planck-Institute Saarbruecken (Germany), RISC Linz (Austria),
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// and Tel-Aviv University (Israel). 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; version 2.1 of the License.
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// See the file LICENSE.LGPL distributed with CGAL.
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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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// $Source$
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// $Revision$ $Date$
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// $Name$
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//
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// Author(s) : Lutz Kettner <kettner@inf.ethz.ch>
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#ifndef CGAL_GENERATORS_H
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#define CGAL_GENERATORS_H 1
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#include <CGAL/basic.h>
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#include <cstddef>
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#include <cmath>
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#include <iterator>
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#include <algorithm>
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#include <CGAL/function_objects.h>
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#include <CGAL/Random.h>
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CGAL_BEGIN_NAMESPACE
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template < class T >
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class Generator_base {
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protected:
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T d_item;
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double d_range;
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public:
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typedef std::input_iterator_tag iterator_category;
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typedef T value_type;
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typedef std::ptrdiff_t difference_type;
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typedef const T* pointer;
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typedef const T& reference;
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typedef Generator_base<T> This;
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Generator_base() {}
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Generator_base( double range) : d_range( range) {}
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Generator_base( const T& item, double range)
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: d_item(item), d_range(range) {}
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bool operator==( const This& base) const {
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return ( d_item == base.d_item);
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}
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bool operator!=( const This& base) const { return ! operator==(base);}
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double range() const { return d_range; }
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reference operator*() const { return d_item; }
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pointer operator->() const { return & operator*(); }
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};
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template < class T >
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class Random_generator_base : public Generator_base<T> {
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protected:
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Random& _rnd;
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public:
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typedef Random_generator_base<T> This;
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Random_generator_base() : _rnd( default_random) {}
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Random_generator_base( double range, Random& rnd)
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: Generator_base<T>( range), _rnd( rnd) {}
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Random_generator_base( const T& item, double range, Random& rnd)
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: Generator_base<T>( item, range), _rnd( rnd) {}
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bool operator==( const This& rb) const {
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return ( _rnd == rb._rnd && Generator_base<T>::operator==(rb));
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}
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bool operator!=( const This& rb) const { return ! operator==(rb); }
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};
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CGAL_END_NAMESPACE
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#endif // CGAL_GENERATORS_H //
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// EOF //
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