key.h

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/*
 * Copyright (c) 2008, Maxim Likhachev
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the University of Pennsylvania nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef __KEY_H_
#define __KEY_H_

#define KEY_SIZE 2

#define INFINITECOST 1000000000

class CKey
{
//data
public: 
        long int key[KEY_SIZE];

//constructors
public:
        CKey(){

#if KEY_SIZE == 1
                key[0] = 0;
#elif KEY_SIZE == 2
                key[0] = 0; key[1] = 0;
#else
                for(int i = 0; i < KEY_SIZE; i++)
                {       
                        key[i] = 0;
                }
#endif
        };
        ~CKey(){};

//functions
public:
        void SetKeytoInfinity()
        {
                for(int i = 0; i < KEY_SIZE; i++)
                {       
                        key[i] = INFINITECOST;
                }
        };
        void SetKeytoZero()
        {
                for(int i = 0; i < KEY_SIZE; i++)
                {       
                        key[i] = 0;
                }
        };
        


//operators
public:

        void operator = (CKey RHSKey)
        {
                //iterate through the keys
                //the 0ht is the most important key

#if KEY_SIZE == 1
                key[0] = RHSKey.key[0];
#elif KEY_SIZE == 2
                key[0] = RHSKey.key[0]; key[1] = RHSKey.key[1];
#else
                for(int i = 0; i < KEY_SIZE; i++)
                        key[i] = RHSKey.key[i];
#endif

        };

        CKey operator - (const CKey& RHSKey) const
        {
                CKey RetKey;

                //iterate through the keys
                //the 0ht is the most important key
                for(int i = 0; i < KEY_SIZE; i++)
                        RetKey.key[i] = key[i] - RHSKey.key[i];

                return RetKey;
        };


        bool operator > (CKey& RHSKey)
        {
          //iterate through the keys
          //the 0ht is the most important key

#if KEY_SIZE == 1
                return (key[0] > RHSKey.key[0]);
#elif KEY_SIZE == 2
                return (key[0] > RHSKey.key[0] ||  (key[0] == RHSKey.key[0] && key[1] > RHSKey.key[1]));
#else
          for(int i = 0; i < KEY_SIZE; i++)
            {
              //compare the current key
              if(key[i] > RHSKey.key[i])
                        return true;
              else if(key[i] < RHSKey.key[i])
                        return false;
            }     
          //all are equal
          return false;
#endif

        };

        bool operator == (CKey& RHSKey)
        {
          //iterate through the keys
          //the 0ht is the most important key

#if KEY_SIZE == 1
                return (key[0] == RHSKey.key[0]);
#elif KEY_SIZE == 2
                return (key[0] == RHSKey.key[0] &&  key[1] == RHSKey.key[1]);
#else

          for(int i = 0; i < KEY_SIZE; i++)
            {
              //compare the current key
              if(key[i] != RHSKey.key[i])
                        return false;
            }
          
          //all are equal
          return true;
#endif

        };

        bool operator != (CKey& RHSKey)
        {
          return !(*this == RHSKey);
        };

        bool operator < (CKey& RHSKey)
        {       
          //iterate through the keys
          //the 0ht is the most important key

#if KEY_SIZE == 1
                return (key[0] < RHSKey.key[0]);
#elif KEY_SIZE == 2
                return (key[0] < RHSKey.key[0] ||  (key[0] == RHSKey.key[0] && key[1] < RHSKey.key[1]));
#else
          for(int i = 0; i < KEY_SIZE; i++)
            {
              //compare the current key
              if(key[i] < RHSKey.key[i])
                        return true;
              else if(key[i] > RHSKey.key[i])
                        return false;
            }     
          //all are equal
          return false; 
#endif

        };

        bool operator >= (CKey& RHSKey)
        {
          return !(*this < RHSKey);
        };

        bool operator <= (CKey& RHSKey)
        {
          return !(*this > RHSKey);
        };
        
        long int operator [] (int i)
        {
                return key[i];
        };

};



#endif