/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 X2C_HEAP_HXX
#define X2C_HEAP_HXX

#include "sistr.hxx"

class HeapItem;

class Heap
{
  public:
						Heap(
							unsigned			i_nWidth );
						~Heap();

	void				InsertValue(
							const char *		i_sKey,
							const char *	   	i_sValue );
	HeapItem *		    ReleaseTop();   		/// @return must be deleted by caller of method.

  private:
	typedef HeapItem * Column;

	void				IncColumn();
	Column &			ActiveColumn()			{ return dpColumnsArray[nActiveColumn]; }

	Column *			dpColumnsArray;
	unsigned			nColumnsArraySize;
	unsigned			nActiveColumn;
};


class HeapItem
{
  public:
						HeapItem(
							const char *		i_sKey,
							const char *	   	i_sValue );
						~HeapItem(  );

	bool				operator<(
							const HeapItem &  	i_rOther ) const;
	bool				operator<=(
							const HeapItem &  	i_rOther ) const
												{ return ! (i_rOther < *this); }
	const Simstr &		Value() const;
	const Simstr &		Key() const;
	HeapItem * 		    Next() const;

	void        		SetNext(
							HeapItem *			i_pNext );
  private:
	Simstr				sValue;
	Simstr              sKey;
	HeapItem *			pNext;
};






#endif