9f16c2bf8e
* *
* update copyright headers with new FSF postal address
* COPYING.txt -> LICENSE.txt (rest of repo to be synced)
93 lines
4.2 KiB
C
93 lines
4.2 KiB
C
/*
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* Harbour common hash table implementation
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*
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* Copyright 1999 Ryszard Glab <rglab@imid.med.pl>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file LICENSE.txt. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA (or visit https://www.gnu.org/licenses/).
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*
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* As a special exception, the Harbour Project gives permission for
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* additional uses of the text contained in its release of Harbour.
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*
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* The exception is that, if you link the Harbour libraries with other
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* files to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the Harbour library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the Harbour
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* Project under the name Harbour. If you copy code from other
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* Harbour Project or Free Software Foundation releases into a copy of
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* Harbour, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for Harbour, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*
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*/
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#ifndef HB_HASH_H_
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#define HB_HASH_H_
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#include "hbapi.h"
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HB_EXTERN_BEGIN
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struct HB_HASH_TABLE_;
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#define HB_HASH_FUNC( hbfunc ) HB_SIZE hbfunc( struct HB_HASH_TABLE_ * HashPtr, const void * Value, const void * Cargo )
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typedef HB_HASH_FUNC( ( * PHB_HASH_FUNC ) );
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typedef struct HB_HASH_ITEM_
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{
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const void * ValPtr; /* value stored in the hash table */
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const void * KeyPtr;
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HB_SIZE key;
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struct HB_HASH_ITEM_ *next;
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} HB_HASH_ITEM, * PHB_HASH_ITEM;
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typedef struct HB_HASH_TABLE_
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{
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PHB_HASH_ITEM * pItems; /* pointer to items */
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HB_SIZE nTableSize; /* the table size - number of slots */
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HB_SIZE nCount; /* number of items stored in the table */
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HB_SIZE nUsed; /* number of used slots */
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PHB_HASH_FUNC pKeyFunc; /* pointer to func that returns key value */
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PHB_HASH_FUNC pDeleteItemFunc; /* ptr to func that deletes value stored in the table */
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PHB_HASH_FUNC pCompFunc; /* ptr to func that compares two items */
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} HB_HASH_TABLE, * PHB_HASH_TABLE;
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extern HB_EXPORT_INT PHB_HASH_TABLE hb_hashTableCreate( HB_SIZE nSize,
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PHB_HASH_FUNC pHashFunc,
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PHB_HASH_FUNC pDelete,
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PHB_HASH_FUNC pComp );
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extern HB_EXPORT_INT void hb_hashTableKill( PHB_HASH_TABLE pTable ); /* release all items and the hash table */
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extern HB_EXPORT_INT HB_BOOL hb_hashTableAdd( PHB_HASH_TABLE pTable, const void * pKey, const void * pValue ); /* add a new item into the table */
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extern HB_EXPORT_INT HB_BOOL hb_hashTableDel( PHB_HASH_TABLE pTable, const void * pKey ); /* delete an item from the table */
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extern HB_EXPORT_INT const void * hb_hashTableFind( PHB_HASH_TABLE pTable, const void * pKey ); /* return the pointer to item's value or NULL if not found */
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extern HB_EXPORT_INT PHB_HASH_TABLE hb_hashTableResize( PHB_HASH_TABLE pTable, HB_SIZE nNewSize ); /* resize the hash table */
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extern HB_EXPORT_INT HB_SIZE hb_hashTableSize( PHB_HASH_TABLE pTable ); /* return the hash table size */
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HB_EXTERN_END
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#endif /* HB_HASH_H_ */
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