mirror of
https://github.com/ptitSeb/Serious-Engine
synced 2024-12-25 15:14:51 +01:00
86 lines
3.0 KiB
C++
86 lines
3.0 KiB
C++
/* Copyright (c) 2002-2012 Croteam Ltd.
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of version 2 of the GNU General Public License as published by
|
|
the Free Software Foundation
|
|
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License along
|
|
with this program; if not, write to the Free Software Foundation, Inc.,
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
|
|
|
|
#if !defined(TYPE) || !defined(VALUE_TYPE) || !defined(CHashTableSlot_TYPE) || !defined(CHashTable_TYPE)
|
|
#error
|
|
#endif
|
|
|
|
#include <Engine/Templates/StaticArray.h>
|
|
|
|
class CHashTableSlot_TYPE {
|
|
public:
|
|
ULONG hts_ulKey; // hashing key
|
|
TYPE *hts_ptElement; // the element inhere
|
|
CHashTableSlot_TYPE(void) { hts_ptElement = NULL; };
|
|
void Clear(void) { hts_ptElement = NULL; };
|
|
};
|
|
|
|
/*
|
|
* Template class for storing pointers to objects for fast access by name.
|
|
*/
|
|
class CHashTable_TYPE {
|
|
// implementation:
|
|
public:
|
|
INDEX ht_ctCompartments; // number of compartments in table
|
|
INDEX ht_ctSlotsPerComp; // number of slots in one compartment
|
|
INDEX ht_ctSlotsPerCompStep; // allocation step for number of slots in one compartment
|
|
CStaticArray<CHashTableSlot_TYPE> ht_ahtsSlots; // all slots are here
|
|
|
|
ULONG (*ht_GetItemKey)(VALUE_TYPE &Value);
|
|
VALUE_TYPE (*ht_GetItemValue)(TYPE* Item);
|
|
|
|
// internal finding, returns pointer to the the slot
|
|
CHashTableSlot_TYPE *FindSlot(ULONG ulKey, VALUE_TYPE &Value);
|
|
// internal finding, returns the index of the item in the nametable
|
|
INDEX FindSlotIndex(ULONG ulKey, VALUE_TYPE &Value);
|
|
// get the item stored in the hashtable by it's index
|
|
TYPE* GetItemFromIndex(INDEX iIndex);
|
|
// get the value of the item stored in the hashtable by it's index
|
|
VALUE_TYPE GetValueFromIndex(INDEX iIndex);
|
|
// expand the hash table to next step
|
|
void Expand(void);
|
|
|
|
// interface:
|
|
public:
|
|
// default constructor
|
|
CHashTable_TYPE(void);
|
|
// destructor -- frees all memory
|
|
~CHashTable_TYPE(void);
|
|
// remove all slots, and reset the nametable to initial (empty) state
|
|
void Clear(void);
|
|
|
|
/* Set allocation parameters. */
|
|
void SetAllocationParameters(INDEX ctCompartments, INDEX ctSlotsPerComp, INDEX ctSlotsPerCompStep);
|
|
// set callbacks
|
|
void SetCallbacks(ULONG (*GetItemKey)(VALUE_TYPE &Item), VALUE_TYPE (*GetItemValue)(TYPE* Item));
|
|
|
|
// find an object by value, return a pointer to it
|
|
TYPE* Find(VALUE_TYPE &Value);
|
|
// find an object by value, return it's index
|
|
INDEX FindIndex(VALUE_TYPE &Value);
|
|
// add a new object
|
|
void Add(TYPE *ptNew);
|
|
// remove an object
|
|
void Remove(TYPE *ptOld);
|
|
// remove an object
|
|
void RemoveAll();
|
|
|
|
// remove all objects but keep slots
|
|
void Reset(void);
|
|
|
|
// get estimated efficiency of the hashtable
|
|
void ReportEfficiency(void);
|
|
};
|