node.hh
Go to the documentation of this file.00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main authors: 00004 * Guido Tack <tack@gecode.org> 00005 * 00006 * Copyright: 00007 * Guido Tack, 2006 00008 * 00009 * Last modified: 00010 * $Date: 2009-01-21 11:36:29 +0100 (Wed, 21 Jan 2009) $ by $Author: schulte $ 00011 * $Revision: 8083 $ 00012 * 00013 * This file is part of Gecode, the generic constraint 00014 * development environment: 00015 * http://www.gecode.org 00016 * 00017 * Permission is hereby granted, free of charge, to any person obtaining 00018 * a copy of this software and associated documentation files (the 00019 * "Software"), to deal in the Software without restriction, including 00020 * without limitation the rights to use, copy, modify, merge, publish, 00021 * distribute, sublicense, and/or sell copies of the Software, and to 00022 * permit persons to whom the Software is furnished to do so, subject to 00023 * the following conditions: 00024 * 00025 * The above copyright notice and this permission notice shall be 00026 * included in all copies or substantial portions of the Software. 00027 * 00028 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00029 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00030 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00031 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00032 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00033 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00034 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00035 * 00036 */ 00037 00038 #ifndef GECODE_GIST_NODE_HH 00039 #define GECODE_GIST_NODE_HH 00040 00041 #include <gecode/support.hh> 00042 00043 namespace Gecode { namespace Gist { 00044 00045 class VisualNode; 00046 00047 static const int NodeBlockSize = 10000; 00048 00050 class Node : public Support::BlockClient<VisualNode,NodeBlockSize> { 00051 private: 00053 Node* parent; 00054 00056 enum { 00057 UNDET, //< Number of children not determined 00058 LEAF, //< Leaf node 00059 TWO_CHILDREN, //< Node with at most two children 00060 MORE_CHILDREN //< Node with more than two children 00061 }; 00062 00064 void* childrenOrFirstChild; 00065 00066 union { 00068 Node* secondChild; 00070 unsigned int noOfChildren; 00071 } c; 00072 00074 unsigned int getTag(void) const; 00076 void setTag(unsigned int tag); 00078 void* getPtr(void) const; 00079 00080 protected: 00082 bool isUndetermined(void) const; 00083 00084 public: 00085 typedef Support::BlockAllocator<VisualNode,NodeBlockSize> NodeAllocator; 00086 00088 Node(void); 00090 ~Node(void); 00091 00093 Node* getParent(void); 00095 Node* getChild(unsigned int n); 00096 00098 bool isRoot(void) const; 00099 00101 void setNumberOfChildren(unsigned int n); 00103 void setChild(unsigned int n, Node* child); 00104 00106 void addChild(Node* child); 00107 00109 unsigned int getNumberOfChildren(void) const; 00110 }; 00111 00112 }} 00113 00114 #include <gecode/gist/node.hpp> 00115 00116 #endif 00117 00118 // STATISTICS: gist-any