db_dict_abs.h
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef _DB_DICT_ABS_H_
- #define _DB_DICT_ABS_H_
- #include "hxtypes.h"
- /*
- * db_dict_abs.h
- *
- * abstract base class defining the api for the underlying database
- * implementation.
- */
- extern UINT32 hash_torek(const char*key);
- typedef UINT32 Keytype;
- class DB_node;
- class Property;
- class DB_implem
- {
- public:
- DB_implem();
- DB_implem(DB_node* parent,
- UINT32 size,
- UINT32(*hash)(const char*),
- int(*comp)(const char*, const char*));
- virtual ~DB_implem();
- // add a node to the database and return the node pointer
- virtual DB_node* add(char* key_str, Property* new_p) = 0;
- // remove the node from the database and return its object
- virtual UINT32 del(const char* key_str) = 0;
- virtual UINT32 del(DB_node* node) = 0;
- // return the first non-null node in the database
- virtual DB_node* first() = 0;
- virtual DB_node* find(char* key_str) = 0;
- // return the non-null node after node "d"
- virtual DB_node* next(DB_node* d) = 0;
- virtual UINT32 hash(const char* str) const = 0;
- virtual DB_node* owner_node() const = 0;
- virtual UINT32 size() const = 0;
- virtual int count() const = 0;
- protected:
- // string comparison function
- int (*_compare)(const char*,const char*);
- // hashing function
- UINT32 (*_hash)(const char*);
- // initial size for buckets/list elements/...
- UINT32 _size;
- // number of elements in the database
- int _count;
- // parent node which contains this dictionary
- DB_node* _owner_node;
- };
- inline
- DB_implem::DB_implem()
- : _compare(0), _hash(0), _size(0), _count(0), _owner_node(0)
- {
- }
- inline
- DB_implem::DB_implem(DB_node* owner_node, UINT32 size,
- UINT32(*hash)(const char*),
- int(*comp)(const char*,const char*))
- : _compare(comp), _hash(hash), _size(size), _count(0),
- _owner_node(owner_node)
- {
- }
- inline
- DB_implem::~DB_implem()
- {
- }
- #endif // _DB_DICT_ABS_H_