2006-06-04 20:02:07 +01:00
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/*
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Copyright (C) 2004,2005,2006 (Nuno A. Fonseca) <nuno.fonseca@gmail.com>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later
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version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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Last rev: $Id: hash.h,v 1.2 2006-06-04 19:02:07 nunofonseca Exp $
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*/
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2006-06-02 05:16:31 +01:00
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#ifndef HASH
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#define HASH
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#include <stdlib.h>
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#if defined (__cplusplus) || (defined (__STDC__) && __STDC__)
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#define __ptr_t void *
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#else /* Not C++ or ANSI C. */
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#define __ptr_t char *
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#endif /* C++ or ANSI C. */
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#ifndef ulong
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#define ulong unsigned long int
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#endif
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#ifndef NULL
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#define NULL 0
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#endif
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struct bucket {
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struct bucket *next;
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ulong value; /* Value >=0 used as key in the hashing*/
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__ptr_t obj; /* pointer to a object*/
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};
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typedef struct bucket hashnode;
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struct hashtable_s {
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hashnode **buckets; //
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ulong size; // number of buckets
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ulong last_bucket; // used in searchs/ hash traversals
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ulong n_entries; // number of entries in the hashtable
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hashnode* last_node;
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};
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//typedef hashnode **hashtable;
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typedef struct hashtable_s* hashtable;
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/* functions */
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hashtable new_hashtable(ulong hashsize);
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__ptr_t get_next_object(hashtable,ulong);
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__ptr_t delete(hashtable,ulong);
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__ptr_t replace_object(hashtable,ulong,__ptr_t);
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__ptr_t get_object(hashtable,ulong);
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int insere(hashtable,ulong,__ptr_t);
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void free_hashtable(hashtable);
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void init_hash_traversal(hashtable table);
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__ptr_t next_hash_object(hashtable table);
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__ptr_t next_hashnode(hashtable table);
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#endif
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