107 lines
3.4 KiB
C#
107 lines
3.4 KiB
C#
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/*
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** SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
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** Copyright (C) 2011 Silicon Graphics, Inc.
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** All Rights Reserved.
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**
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** Permission is hereby granted, free of charge, to any person obtaining a copy
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** of this software and associated documentation files (the "Software"), to deal
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** in the Software without restriction, including without limitation the rights
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** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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** of the Software, and to permit persons to whom the Software is furnished to do so,
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** subject to the following conditions:
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**
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** The above copyright notice including the dates of first publication and either this
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** permission notice or a reference to http://oss.sgi.com/projects/FreeB/ shall be
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** included in all copies or substantial portions of the Software.
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**
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** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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** INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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** PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL SILICON GRAPHICS, INC.
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** BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
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** OR OTHER DEALINGS IN THE SOFTWARE.
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**
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** Except as contained in this notice, the name of Silicon Graphics, Inc. shall not
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** be used in advertising or otherwise to promote the sale, use or other dealings in
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** this Software without prior written authorization from Silicon Graphics, Inc.
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*/
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/*
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** Original Author: Eric Veach, July 1994.
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** libtess2: Mikko Mononen, http://code.google.com/p/libtess2/.
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** LibTessDotNet: Remi Gillig, https://github.com/speps/LibTessDotNet
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*/
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namespace Unity.SpriteShape.External
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{
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namespace LibTessDotNet
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{
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internal class Dict<TValue> where TValue : class
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{
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public class Node
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{
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internal TValue _key;
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internal Node _prev, _next;
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public TValue Key { get { return _key; } }
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public Node Prev { get { return _prev; } }
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public Node Next { get { return _next; } }
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}
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public delegate bool LessOrEqual(TValue lhs, TValue rhs);
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private LessOrEqual _leq;
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Node _head;
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public Dict(LessOrEqual leq)
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{
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_leq = leq;
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_head = new Node { _key = null };
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_head._prev = _head;
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_head._next = _head;
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}
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public Node Insert(TValue key)
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{
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return InsertBefore(_head, key);
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}
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public Node InsertBefore(Node node, TValue key)
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{
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do {
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node = node._prev;
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} while (node._key != null && !_leq(node._key, key));
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var newNode = new Node { _key = key };
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newNode._next = node._next;
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node._next._prev = newNode;
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newNode._prev = node;
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node._next = newNode;
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return newNode;
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}
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public Node Find(TValue key)
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{
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var node = _head;
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do {
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node = node._next;
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} while (node._key != null && !_leq(key, node._key));
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return node;
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}
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public Node Min()
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{
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return _head._next;
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}
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public void Remove(Node node)
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{
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node._next._prev = node._prev;
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node._prev._next = node._next;
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}
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}
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}
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} // namespace Unity.VectorGraphics.External
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