qgdict.h

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/****************************************************************************
** $Id: qgdict.h,v 1.2 2003/07/10 02:40:11 llornkcor Exp $
**
** Definition of QGDict and QGDictIterator classes
**
** Created : 920529
**
** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
** This file is part of the tools module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
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** licenses may use this file in accordance with the Qt Commercial License
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**
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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

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