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bllip-parser / first-stage / PARSE / EdgeHeap.h

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/*
 * Copyright 1999, 2005 Brown University, Providence, RI.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.  You may obtain
 * a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

#ifndef EDGEHEAP_H 
#define EDGEHEAP_H

#define HeapSize 370000
class Edge;

class           EdgeHeap
{
public:
  EdgeHeap();
  ~EdgeHeap();
  void    insert(Edge* edge);
  Edge*   pop();
  void    del(Edge* edge);
  Edge**  ar() { return array; }
  int     size() { return unusedPos_; }
  //void    check();
  bool print;
private:
  void  del_(int pos);
  void  downHeap(int pos);
  bool  upheap(int pos);
  int   left_child(int par) const { return (par*2) + 1; }
  int   right_child(int par) const { return ((par*2) + 2); }
  int   parent(int child) const { return ((child-1)/2); }
  int   unusedPos_;
  Edge* array[HeapSize];
};



#endif /* !EDGEHEAP_H */