dict.h

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: dict.h,v 1.1.50.3 2004/07/09 01:45:51 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
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 * the file under the current version of the RealNetworks Community
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 * will apply. You may also obtain the license terms directly from
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 * ***** END LICENSE BLOCK ***** */

#ifndef	_DICT_H_
#define	_DICT_H_

extern unsigned int default_strhash(const char *key);

class Dict;

class Dict_entry
{
public:
    char*		key;
    void*		obj;
private:
    friend class	Dict;

    unsigned int	hash;
    Dict_entry*		next;
};

class	Dict
{
public:
    typedef const char*	Key;

			Dict(unsigned int nbuckets=16);
			Dict(int(*comp)(const char*,const char*),
			     unsigned int(*hash)(const char*) = default_strhash,
			     unsigned int nbuckets=16);
			~Dict();

    Dict_entry*		enter(Key key, void* obj);
    void*		remove(Key key);
    Dict_entry*		find(Key key);
    void		first(unsigned int&h, Dict_entry*& e);
    void		next(unsigned int& h, Dict_entry*& e);
    int			size();
#ifdef XXXAAK_AWAITING_CR
    Dict_entry*		enter(Key key, void* obj, UINT32& hashId);
    void*		remove(UINT32 hashId);
    Dict_entry*		find(UINT32 hashId);
#endif

private:
    unsigned int	_count;
    unsigned int	_nbuckets;
    Dict_entry**	_table;
    int			(*_compare)(const char*, const char*);
    unsigned int	(*_hash)(const char*);
    void		init();
};

inline int
Dict::size()
{
    return _count;
}

inline void
Dict::first(unsigned int&h, Dict_entry*& e)
{
    for (unsigned int i = 0; i < _nbuckets; i++)
	if (_table[i])
	{
	    h = i;
	    e = _table[i];
	    return;
	}
    e = 0;
}

class	Dict_iterator
{
public:
			Dict_iterator(Dict*d);
    Dict_entry*		operator*();
    Dict_entry*		operator ++() { _d->next(_h, _e); return _e;}
    int			operator!=(const Dict_iterator& rhs);
    int			operator==(const Dict_iterator& rhs);
private:
    Dict*		_d;
    unsigned int	_h;
    Dict_entry*		_e;
};

inline
Dict_iterator::Dict_iterator(Dict*d): _d(d)
{
    _d->first(_h,_e);
}

inline int		
Dict_iterator::operator!=(const Dict_iterator& rhs)
{
    return _e != rhs._e;
}

inline int 
Dict_iterator::operator==(const Dict_iterator& rhs)
{
    return _e == rhs._e;
}
inline Dict_entry*
Dict_iterator::operator*()
{
    return _e;
}
#endif/*_DICT_H_*/