98 lines
3.9 KiB
C
98 lines
3.9 KiB
C
/*
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* $Id$
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*/
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/*
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* Harbour Project source code:
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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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* www - http://www.harbour-project.org
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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 software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
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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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#if defined(HB_EXTERN_C)
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extern "C" {
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#endif
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#define HB_HASH_FUNC( hbfunc ) ULONG hbfunc( void *Value, void *Cargo )
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typedef HB_HASH_FUNC( HB_HASH_FUNC_ );
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typedef HB_HASH_FUNC_ *HB_HASH_FUNC_PTR;
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typedef struct HB_HASH_ITEM_
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{
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void *cargo; /* value stored in the hash table */
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ULONG key;
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struct HB_HASH_ITEM_ *next;
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} HB_HASH_ITEM, *HB_HASH_ITEM_PTR;
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typedef struct HB_HASH_TABLE_
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{
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HB_HASH_ITEM_PTR *pItems; /* pointer to items */
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ULONG ulTableSize; /* the table size - number of slots */
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ULONG ulCount; /* number of items stored in the table */
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ULONG ulUsed; /* number of used slots */
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HB_HASH_FUNC_PTR pKeyFunc; /* pointer to func that returns key value */
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HB_HASH_FUNC_PTR pDeleteItemFunc; /* ptr to func that deletes value stured in the table */
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HB_HASH_FUNC_PTR pCompFunc; /* ptr to func that compares two itmes */
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} HB_HASH_TABLE, *HB_HASH_TABLE_PTR;
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extern HB_HASH_TABLE_PTR hb_hashTableCreate( ULONG ulSize,
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HB_HASH_FUNC_PTR pHashFunc,
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HB_HASH_FUNC_PTR pDelete,
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HB_HASH_FUNC_PTR pComp );
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extern void hb_hashTableKill( HB_HASH_TABLE_PTR pTable ); /* release all items and the hash table */
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extern BOOL hb_hashTableAdd( HB_HASH_TABLE_PTR pTable, void *pValue ); /* add a new item into the table */
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extern void * hb_hashTableFind( HB_HASH_TABLE_PTR pTable, void *pValue ); /* return the pointer to item's value or NULL if not found */
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extern HB_HASH_TABLE_PTR hb_hashTableResize( HB_HASH_TABLE_PTR pTable, ULONG ulNewSize ); /* resize the hash table */
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#if defined(HB_EXTERN_C)
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}
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#endif
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#endif /* HB_HASH_H_ */
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