137 lines
2.8 KiB
C
137 lines
2.8 KiB
C
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// Copyright (c) 1999
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// Utrecht University (The Netherlands),
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// ETH Zurich (Switzerland),
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// INRIA Sophia-Antipolis (France),
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// Max-Planck-Institute Saarbruecken (Germany),
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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; 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) : Stefan Schirra
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#ifndef CGAL_ENUM_H
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#define CGAL_ENUM_H
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#include <CGAL/config.h>
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#include <CGAL/Kernel/Same_uncertainty.h>
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#include <CGAL/Origin.h>
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// If you add/change one type here, please update Is_a_predicate.h as well.
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namespace CGAL {
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enum Sign
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{
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NEGATIVE = -1, ZERO = 0, POSITIVE = 1,
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// Orientation constants:
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RIGHT_TURN = -1, LEFT_TURN = 1,
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CLOCKWISE = -1, COUNTERCLOCKWISE = 1,
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COLLINEAR = 0, COPLANAR = 0, DEGENERATE = 0,
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// Oriented_side constants:
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ON_NEGATIVE_SIDE = -1, ON_ORIENTED_BOUNDARY = 0, ON_POSITIVE_SIDE = 1,
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// Comparison_result constants:
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SMALLER = -1, EQUAL = 0, LARGER = 1
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};
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typedef Sign Orientation;
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typedef Sign Oriented_side;
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typedef Sign Comparison_result;
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enum Bounded_side
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{
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ON_UNBOUNDED_SIDE = -1,
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ON_BOUNDARY,
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ON_BOUNDED_SIDE
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};
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enum Angle
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{
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OBTUSE = -1,
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RIGHT,
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ACUTE
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};
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template <class T>
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inline
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T
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opposite(const T& t)
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{ return -t; }
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inline
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Sign
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operator-(Sign o)
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{ return static_cast<Sign>( - static_cast<int>(o)); }
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inline
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Bounded_side
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opposite(Bounded_side bs)
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{ return static_cast<Bounded_side>( - static_cast<int>(bs)); }
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inline
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Angle
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opposite(Angle a)
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{ return static_cast<Angle>( - static_cast<int>(a)); }
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inline Sign operator* (Sign s1, Sign s2)
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{
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return static_cast<Sign> (static_cast<int> (s1) * static_cast<int> (s2));
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}
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enum Box_parameter_space_2
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{
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LEFT_BOUNDARY = 0,
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RIGHT_BOUNDARY,
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BOTTOM_BOUNDARY,
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TOP_BOUNDARY,
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INTERIOR,
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EXTERIOR
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};
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#ifdef CGAL_CFG_MATCHING_BUG_5
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template < typename T, typename U >
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inline
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T enum_cast_bug(const U& u, const T*)
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{ return static_cast<T>(u); }
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template < typename T, typename U >
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inline
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typename Same_uncertainty<T,U>::type enum_cast(const U& u)
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{ return enum_cast_bug(u, (const T*)0); }
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#else
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template < typename T, typename U >
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inline
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T enum_cast(const U& u)
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{ return static_cast<T>(u); }
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#endif
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} //namespace CGAL
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#endif // CGAL_ENUM_H
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