diff options
Diffstat (limited to 'hmap.h')
| -rw-r--r-- | hmap.h | 175 |
1 files changed, 85 insertions, 90 deletions
@@ -1,4 +1,4 @@ -#pragma warning(disable:4786) +#pragma warning(disable:4786) #ifndef hmap_h #define hmap_h @@ -17,105 +17,100 @@ template <class obj_type, class key_type> class hmap { private: - enum entry_type - { - ACTIVE, EMPTY, DELETED - }; - - struct hash_entry - { - obj_type element; - key_type key; - entry_type info; - - hash_entry( const obj_type &e = obj_type( ), const key_type &k = key_type( ), entry_type i = EMPTY ) : element( e ), key( k ), info( i ) - { } - } - ; - - int occupied; - - virtual bool isActive( int currentPos ) const; - virtual void rehash( ); - virtual bool isPrime ( int n ) const; - virtual int nextPrime( int n ) const; - double maxOccupiedPercentage; + enum entry_type + { + ACTIVE, EMPTY, DELETED + }; + + struct hash_entry + { + obj_type element; + key_type key; + entry_type info; + + hash_entry( const obj_type &e = obj_type( ), const key_type &k = key_type( ), entry_type i = EMPTY ) : element( e ), key( k ), info( i ) { } + }; + + int occupied; + + virtual bool isActive( int currentPos ) const; + virtual void rehash( ); + virtual bool isPrime ( int n ) const; + virtual int nextPrime( int n ) const; + double maxOccupiedPercentage; protected: - int lookups; - unsigned int hash( const string &key ) const; - vector<hash_entry> array; + int lookups; + unsigned int hash( const string &key ) const; + vector<hash_entry> array; public: - hmap( double moc ); - - virtual int findPos ( const key_type &k ); - virtual void make_empty( ); - virtual void add_elem ( const obj_type &x, const key_type &k ); - virtual void del_elem ( const key_type &k ); - virtual obj_type get_elem ( const key_type &k ); - - virtual void run_func( void (*func)(obj_type) ); - virtual void run_func( void (*func)(obj_type, void*), void* v_arg ); - - // inline: - void getSize() - { - int size = 0; - for( int j = 0; j < array.size( ); j++ ) - if (array[ j ].info == ACTIVE) - size++; - return size; - }; - - int getLookups() - { - return lookups; - }; - - int getCapacity() - { - return array.size(); - }; - - double getLambda() - { - return static_cast<double>(getSize())/static_cast<double>(getCapacity()); - } - - obj_type& operator[]( key_type &k ) - { - return get_elem( k ); - } + hmap( double moc ); + + virtual int findPos ( const key_type &k ); + virtual void make_empty( ); + virtual void add_elem ( const obj_type &x, const key_type &k ); + virtual void del_elem ( const key_type &k ); + virtual obj_type get_elem ( const key_type &k ); + + virtual void run_func( void (*func)(obj_type) ); + virtual void run_func( void (*func)(obj_type, void*), void* v_arg ); + + // inline: + void getSize() + { + int size = 0; + for( int j = 0; j < array.size( ); j++ ) + if (array[ j ].info == ACTIVE) + size++; + return size; + }; + + int getLookups() + { + return lookups; + }; + + int getCapacity() + { + return array.size(); + }; + + double getLambda() + { + return static_cast<double>(getSize())/static_cast<double>(getCapacity()); + } + + obj_type& operator[]( key_type &k ) + { + return get_elem( k ); + } }; template <class obj_type, class key_type> -class linearhmap : public hmap<obj_type, key_type> -{ +class linearhmap : public hmap<obj_type, key_type> { public: - linearhmap(double moc) : hmap<obj_type, key_type>(moc) - {} - ; - - virtual int findPos( const key_type &k ) - { - int collisionNum = 0; - int currentPos = hash( k ) % hmap<obj_type, key_type>::array.size( ); - hmap<obj_type, key_type>::lookups++; - - while( hmap<obj_type, key_type>::array[ currentPos ].info != hmap<obj_type, key_type>::EMPTY && - hmap<obj_type, key_type>::array[ currentPos ].key != k ) - { - hmap<obj_type, key_type>::lookups ++; - currentPos++; - - if( currentPos >= hmap<obj_type, key_type>::array.size( ) ) - currentPos -= hmap<obj_type, key_type>::array.size( ); - } - - return currentPos; + linearhmap(double moc) : hmap<obj_type, key_type>(moc) {}; + + virtual int findPos( const key_type &k ) + { + int collisionNum = 0; + int currentPos = hash( k ) % array.size( ); + lookups++; + + while( array[ currentPos ].info != EMPTY && + array[ currentPos ].key != k ) + { + lookups ++; + currentPos++; + + if( currentPos >= array.size( ) ) + currentPos -= array.size( ); } + + return currentPos; + } }; #include "hmap.cpp" |
