/****************************************************************************
**
** Definition of QGDict and QGDictIterator classes
**
** Created : 920529
**
** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
**
** This file is part of the tools module of the Qt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.QPL
** included in the packaging of this file.  Licensees holding valid Qt
** Commercial licenses may use this file in accordance with the Qt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
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**********************************************************************/

#ifndef QGDICT_H
#define QGDICT_H

#ifndef QT_H
#include "qptrcollection.h"
#include "qstring.h"
#endif // QT_H

class QGDictIterator;
class QGDItList;


class QBaseBucket				// internal dict node
{
public:
    QPtrCollection::Item	 getData()			{ return data; }
    QPtrCollection::Item	 setData( QPtrCollection::Item d ) { return data = d; }
    QBaseBucket		*getNext()			{ return next; }
    void		 setNext( QBaseBucket *n)	{ next = n; }
protected:
    QBaseBucket( QPtrCollection::Item d, QBaseBucket *n ) : data(d), next(n) {}
    QPtrCollection::Item	 data;
    QBaseBucket		*next;
};

class QStringBucket : public QBaseBucket
{
public:
    QStringBucket( const QString &k, QPtrCollection::Item d, QBaseBucket *n )
	: QBaseBucket(d,n), key(k)		{}
    const QString  &getKey() const		{ return key; }
private:
    QString	    key;
};

class QAsciiBucket : public QBaseBucket
{
public:
    QAsciiBucket( const char *k, QPtrCollection::Item d, QBaseBucket *n )
	: QBaseBucket(d,n), key(k) {}
    const char *getKey() const { return key; }
private:
    const char *key;
};

class QIntBucket : public QBaseBucket
{
public:
    QIntBucket( long k, QPtrCollection::Item d, QBaseBucket *n )
	: QBaseBucket(d,n), key(k) {}
    long  getKey() const { return key; }
private:
    long  key;
};

class QPtrBucket : public QBaseBucket
{
public:
    QPtrBucket( void *k, QPtrCollection::Item d, QBaseBucket *n )
	: QBaseBucket(d,n), key(k) {}
    void *getKey() const { return key; }
private:
    void *key;
};


class Q_EXPORT QGDict : public QPtrCollection	// generic dictionary class
{
public:
    uint	count() const	{ return numItems; }
    uint	size()	const	{ return vlen; }
    QPtrCollection::Item look_string( const QString& key, QPtrCollection::Item,
				   int );
    QPtrCollection::Item look_ascii( const char *key, QPtrCollection::Item, int );
    QPtrCollection::Item look_int( long key, QPtrCollection::Item, int );
    QPtrCollection::Item look_ptr( void *key, QPtrCollection::Item, int );
#ifndef QT_NO_DATASTREAM
    QDataStream &read( QDataStream & );
    QDataStream &write( QDataStream & ) const;
#endif
protected:
    enum KeyType { StringKey, AsciiKey, IntKey, PtrKey };

    QGDict( uint len, KeyType kt, bool cs, bool ck );
    QGDict( const QGDict & );
   ~QGDict();

    QGDict     &operator=( const QGDict & );

    bool	remove_string( const QString &key, QPtrCollection::Item item=0 );
    bool	remove_ascii( const char *key, QPtrCollection::Item item=0 );
    bool	remove_int( long key, QPtrCollection::Item item=0 );
    bool	remove_ptr( void *key, QPtrCollection::Item item=0 );
    QPtrCollection::Item take_string( const QString &key );
    QPtrCollection::Item take_ascii( const char *key );
    QPtrCollection::Item take_int( long key );
    QPtrCollection::Item take_ptr( void *key );

    void	clear();
    void	resize( uint );

    int		hashKeyString( const QString & );
    int		hashKeyAscii( const char * );

    void	statistics() const;

#ifndef QT_NO_DATASTREAM
    virtual QDataStream &read( QDataStream &, QPtrCollection::Item & );
    virtual QDataStream &write( QDataStream &, QPtrCollection::Item ) const;
#endif
private:
    QBaseBucket **vec;
    uint	vlen;
    uint	numItems;
    uint	keytype	: 2;
    uint	cases	: 1;
    uint	copyk	: 1;
    QGDItList  *iterators;
    void	   unlink_common( int, QBaseBucket *, QBaseBucket * );
    QStringBucket *unlink_string( const QString &,
				  QPtrCollection::Item item = 0 );
    QAsciiBucket  *unlink_ascii( const char *, QPtrCollection::Item item = 0 );
    QIntBucket    *unlink_int( long, QPtrCollection::Item item = 0 );
    QPtrBucket    *unlink_ptr( void *, QPtrCollection::Item item = 0 );
    void	init( uint, KeyType, bool, bool );
    friend class QGDictIterator;
};


class Q_EXPORT QGDictIterator			// generic dictionary iterator
{
friend class QGDict;
public:
    QGDictIterator( const QGDict & );
    QGDictIterator( const QGDictIterator & );
    QGDictIterator &operator=( const QGDictIterator & );
   ~QGDictIterator();

    QPtrCollection::Item toFirst();

    QPtrCollection::Item get()	     const;
    QString	      getKeyString() const;
    const char	     *getKeyAscii()  const;
    long	      getKeyInt()    const;
    void	     *getKeyPtr()    const;

    QPtrCollection::Item operator()();
    QPtrCollection::Item operator++();
    QPtrCollection::Item operator+=(uint);

protected:
    QGDict	     *dict;

private:
    QBaseBucket      *curNode;
    uint	      curIndex;
};

inline QPtrCollection::Item QGDictIterator::get() const
{
    return curNode ? curNode->getData() : 0;
}

inline QString QGDictIterator::getKeyString() const
{
    return curNode ? ((QStringBucket*)curNode)->getKey() : QString::null;
}

inline const char *QGDictIterator::getKeyAscii() const
{
    return curNode ? ((QAsciiBucket*)curNode)->getKey() : 0;
}

inline long QGDictIterator::getKeyInt() const
{
    return curNode ? ((QIntBucket*)curNode)->getKey() : 0;
}

inline void *QGDictIterator::getKeyPtr() const
{
    return curNode ? ((QPtrBucket*)curNode)->getKey() : 0;
}


#endif // QGDICT_H