qmap.h

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.10平台上编译为嵌入式图形界面操作系统。

    header = new Node;
    header->color = QMapNodeBase::Red; // Mark the header
    if ( _map->header->parent == 0 ) {
	header->parent = 0;
	header->left = header->right = header;
    } else {
	header->parent = copy( (NodePtr)(_map->header->parent) );
	header->parent->parent = header;
	header->left = header->parent->minimum();
	header->right = header->parent->maximum();
    }
}

template <class Key, class T>
Q_INLINE_TEMPLATES Q_TYPENAME QMapPrivate<Key,T>::NodePtr QMapPrivate<Key,T>::copy( Q_TYPENAME QMapPrivate<Key,T>::NodePtr p )
{
    if ( !p )
	return 0;
    NodePtr n = new Node( *p );
    n->color = p->color;
    if ( p->left ) {
	n->left = copy( (NodePtr)(p->left) );
	n->left->parent = n;
    } else {
	n->left = 0;
    }
    if ( p->right ) {
	n->right = copy( (NodePtr)(p->right) );
	n->right->parent = n;
    } else {
	n->right = 0;
    }
    return n;
}

template <class Key, class T>
Q_INLINE_TEMPLATES void QMapPrivate<Key,T>::clear()
{
    clear( (NodePtr)(header->parent) );
    header->color = QMapNodeBase::Red;
    header->parent = 0;
    header->left = header->right = header;
    node_count = 0;
}

template <class Key, class T>
Q_INLINE_TEMPLATES void QMapPrivate<Key,T>::clear( Q_TYPENAME QMapPrivate<Key,T>::NodePtr p )
{
    while ( p != 0 ) {
	clear( (NodePtr)p->right );
	NodePtr y = (NodePtr)p->left;
	delete p;
	p = y;
    }
}

template <class Key, class T>
Q_INLINE_TEMPLATES Q_TYPENAME QMapPrivate<Key,T>::ConstIterator QMapPrivate<Key,T>::find(const Key& k) const
{
    QMapNodeBase* y = header;        // Last node
    QMapNodeBase* x = header->parent; // Root node.

    while ( x != 0 ) {
	// If as k <= key(x) go left
	if ( !( key(x) < k ) ) {
	    y = x;
	    x = x->left;
	} else {
	    x = x->right;
	}
    }

    // Was k bigger/smaller then the biggest/smallest
    // element of the tree ? Return end()
    if ( y == header || k < key(y) )
	return ConstIterator( header );
    return ConstIterator( (NodePtr)y );
}

template <class Key, class T>
Q_INLINE_TEMPLATES Q_TYPENAME QMapPrivate<Key,T>::Iterator QMapPrivate<Key,T>::insertSingle( const Key& k )
{
    // Search correct position in the tree
    QMapNodeBase* y = header;
    QMapNodeBase* x = header->parent;
    bool result = TRUE;
    while ( x != 0 ) {
	result = ( k < key(x) );
	y = x;
	x = result ? x->left : x->right;
    }
    // Get iterator on the last not empty one
    Iterator j( (NodePtr)y );
    if ( result ) {
	// Smaller then the leftmost one ?
	if ( j == begin() ) {
	    return insert(x, y, k );
	} else {
	    // Perhaps daddy is the right one ?
	    --j;
	}
    }
    // Really bigger ?
    if ( (j.node->key) < k )
	return insert(x, y, k );
    // We are going to replace a node
    return j;
}


template <class Key, class T>
Q_INLINE_TEMPLATES Q_TYPENAME QMapPrivate<Key,T>::Iterator QMapPrivate<Key,T>::insert( QMapNodeBase* x, QMapNodeBase* y, const Key& k )
{
    NodePtr z = new Node( k );
    if (y == header || x != 0 || k < key(y) ) {
	y->left = z;                // also makes leftmost = z when y == header
	if ( y == header ) {
	    header->parent = z;
	    header->right = z;
	} else if ( y == header->left )
	    header->left = z;           // maintain leftmost pointing to min node
    } else {
	y->right = z;
	if ( y == header->right )
	    header->right = z;          // maintain rightmost pointing to max node
    }
    z->parent = y;
    z->left = 0;
    z->right = 0;
    rebalance( z, header->parent );
    ++node_count;
    return Iterator(z);
}


#ifdef QT_CHECK_RANGE
# if !defined( QT_NO_DEBUG ) && defined( QT_CHECK_MAP_RANGE )
#  define QT_CHECK_INVALID_MAP_ELEMENT if ( empty() ) qWarning( "QMap: Warning invalid element" )
#  define QT_CHECK_INVALID_MAP_ELEMENT_FATAL Q_ASSERT( !empty() );
# else
#  define QT_CHECK_INVALID_MAP_ELEMENT
#  define QT_CHECK_INVALID_MAP_ELEMENT_FATAL
# endif
#else
# define QT_CHECK_INVALID_MAP_ELEMENT
# define QT_CHECK_INVALID_MAP_ELEMENT_FATAL
#endif

template <class T> class QDeepCopy;

template<class Key, class T>
class QMap
{
public:
    /**
     * Typedefs
     */
    typedef Key key_type;
    typedef T mapped_type;
    typedef QPair<const key_type, mapped_type> value_type;
    typedef value_type* pointer;
    typedef const value_type* const_pointer;
    typedef value_type& reference;
    typedef const value_type& const_reference;
#ifndef QT_NO_STL
    typedef ptrdiff_t  difference_type;
#else
    typedef int difference_type;
#endif
    typedef size_t      size_type;
    typedef QMapIterator<Key,T> iterator;
    typedef QMapConstIterator<Key,T> const_iterator;
    typedef QPair<iterator,bool> insert_pair;

    typedef QMapIterator< Key, T > Iterator;
    typedef QMapConstIterator< Key, T > ConstIterator;
    typedef T ValueType;
    typedef QMapPrivate< Key, T > Priv;

    /**
     * API
     */
    QMap()
    {
	sh = new QMapPrivate< Key, T >;
    }
    QMap( const QMap<Key,T>& m )
    {
	sh = m.sh; sh->ref();
    }

#ifndef QT_NO_STL
    QMap( const std::map<Key,T>& m )
    {
	sh = new QMapPrivate<Key,T>;
	Q_TYPENAME std::map<Key,T>::const_iterator it = m.begin();
	for ( ; it != m.end(); ++it ) {
	    value_type p( (*it).first, (*it).second );
	    insert( p );
	}
    }
#endif
    ~QMap()
    {
	if ( sh->deref() )
	    delete sh;
    }
    QMap<Key,T>& operator= ( const QMap<Key,T>& m );
#ifndef QT_NO_STL
    QMap<Key,T>& operator= ( const std::map<Key,T>& m )
    {
	clear();
	Q_TYPENAME std::map<Key,T>::const_iterator it = m.begin();
	for ( ; it != m.end(); ++it ) {
	    value_type p( (*it).first, (*it).second );
	    insert( p );
	}
	return *this;
    }
#endif

    iterator begin() { detach(); return sh->begin(); }
    iterator end() { detach(); return sh->end(); }
    const_iterator begin() const { return ((const Priv*)sh)->begin(); }
    const_iterator end() const { return ((const Priv*)sh)->end(); }
    const_iterator constBegin() const { return begin(); }
    const_iterator constEnd() const { return end(); }

    iterator replace( const Key& k, const T& v )
    {
	remove( k );
	return insert( k, v );
    }

    size_type size() const
    {
	return sh->node_count;
    }
    bool empty() const
    {
	return sh->node_count == 0;
    }
    QPair<iterator,bool> insert( const value_type& x );

    void erase( iterator it )
    {
	detach();
	sh->remove( it );
    }
    void erase( const key_type& k );
    size_type count( const key_type& k ) const;
    T& operator[] ( const Key& k );
    void clear();

    iterator find ( const Key& k )
    {
	detach();
	return iterator( sh->find( k ).node );
    }
    const_iterator find ( const Key& k ) const {	return sh->find( k ); }

    const T& operator[] ( const Key& k ) const
	{ QT_CHECK_INVALID_MAP_ELEMENT; return sh->find( k ).data(); }
    bool contains ( const Key& k ) const
	{ return find( k ) != end(); }
	//{ return sh->find( k ) != ((const Priv*)sh)->end(); }

    size_type count() const { return sh->node_count; }

    QValueList<Key> keys() const {
	QValueList<Key> r;
	for (const_iterator i=begin(); i!=end(); ++i)
	    r.append(i.key());
	return r;
    }

    QValueList<T> values() const {
	QValueList<T> r;
	for (const_iterator i=begin(); i!=end(); ++i)
	    r.append(*i);
	return r;
    }

    bool isEmpty() const { return sh->node_count == 0; }

    iterator insert( const Key& key, const T& value, bool overwrite = TRUE );
    void remove( iterator it ) { detach(); sh->remove( it ); }
    void remove( const Key& k );

#if defined(Q_FULL_TEMPLATE_INSTANTIATION)
    bool operator==( const QMap<Key,T>& ) const { return FALSE; }
#ifndef QT_NO_STL
    bool operator==( const std::map<Key,T>& ) const { return FALSE; }
#endif
#endif

protected:
    /**
     * Helpers
     */
    void detach() {  if ( sh->count > 1 ) detachInternal(); }

    Priv* sh;
private:
    void detachInternal();

    friend class QDeepCopy< QMap<Key,T> >;
};

template<class Key, class T>
Q_INLINE_TEMPLATES QMap<Key,T>& QMap<Key,T>::operator= ( const QMap<Key,T>& m )
{
    m.sh->ref();
    if ( sh->deref() )
	delete sh;
    sh = m.sh;
    return *this;
}

template<class Key, class T>
Q_INLINE_TEMPLATES Q_TYPENAME QMap<Key,T>::insert_pair QMap<Key,T>::insert( const Q_TYPENAME QMap<Key,T>::value_type& x )
{
    detach();
    size_type n = size();
    iterator it = sh->insertSingle( x.first );
    bool inserted = FALSE;
    if ( n < size() ) {
	inserted = TRUE;
	it.data() = x.second;
    }
    return QPair<iterator,bool>( it, inserted );
}

template<class Key, class T>
Q_INLINE_TEMPLATES void QMap<Key,T>::erase( const Key& k )
{
    detach();
    iterator it( sh->find( k ).node );
    if ( it != end() )
	sh->remove( it );
}

template<class Key, class T>
Q_INLINE_TEMPLATES Q_TYPENAME QMap<Key,T>::size_type QMap<Key,T>::count( const Key& k ) const
{
    const_iterator it( sh->find( k ).node );
    if ( it != end() ) {
	size_type c = 0;
	while ( it != end() ) {
	    ++it;
	    ++c;
	}
	return c;
    }
    return 0;
}

template<class Key, class T>
Q_INLINE_TEMPLATES T& QMap<Key,T>::operator[] ( const Key& k )
{
    detach();
    QMapNode<Key,T>* p = sh->find( k ).node;
    if ( p != sh->end().node )
	return p->data;
    return insert( k, T() ).data();
}

template<class Key, class T>
Q_INLINE_TEMPLATES void QMap<Key,T>::clear()
{
    if ( sh->count == 1 )
	sh->clear();
    else {
	sh->deref();
	sh = new QMapPrivate<Key,T>;
    }
}

template<class Key, class T>
Q_INLINE_TEMPLATES Q_TYPENAME QMap<Key,T>::iterator QMap<Key,T>::insert( const Key& key, const T& value, bool overwrite )
{
    detach();
    size_type n = size();
    iterator it = sh->insertSingle( key );
    if ( overwrite || n < size() )
	it.data() = value;
    return it;
}

template<class Key, class T>
Q_INLINE_TEMPLATES void QMap<Key,T>::remove( const Key& k )
{
    detach();
    iterator it( sh->find( k ).node );
    if ( it != end() )
	sh->remove( it );
}

template<class Key, class T>
Q_INLINE_TEMPLATES void QMap<Key,T>::detachInternal()
{
    sh->deref(); sh = new QMapPrivate<Key,T>( sh );
}


#ifndef QT_NO_DATASTREAM
template<class Key, class T>
Q_INLINE_TEMPLATES QDataStream& operator>>( QDataStream& s, QMap<Key,T>& m ) {
    m.clear();
    Q_UINT32 c;
    s >> c;
    for( Q_UINT32 i = 0; i < c; ++i ) {
	Key k; T t;
	s >> k >> t;
	m.insert( k, t );
	if ( s.atEnd() )
	    break;
    }
    return s;
}


template<class Key, class T>
Q_INLINE_TEMPLATES QDataStream& operator<<( QDataStream& s, const QMap<Key,T>& m ) {
    s << (Q_UINT32)m.size();
    QMapConstIterator<Key,T> it = m.begin();
    for( ; it != m.end(); ++it )
	s << it.key() << it.data();
    return s;
}
#endif

#define Q_DEFINED_QMAP
#include "qwinexport.h"
#endif // QMAP_H