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This is the verbatim text of the qmap.h include file. It is provided only for illustration; the copyright remains with Trolltech.
/****************************************************************************
** $Id: qt/qmap.h 3.0.4 edited Apr 9 16:49 $
**
** Definition of QMap class
**
** Created : 990406
**
** 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.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** 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
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
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** information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
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**********************************************************************/
#ifndef QMAP_H
#define QMAP_H
#ifndef QT_H
#include "qshared.h"
#include "qdatastream.h"
#include "qpair.h"
#include "qtl.h"
#endif // QT_H
#ifndef QT_NO_STL
#include <iterator>
#include <map>
#endif
//#define QT_CHECK_MAP_RANGE
struct Q_EXPORT QMapNodeBase
{
enum Color { Red, Black };
QMapNodeBase* left;
QMapNodeBase* right;
QMapNodeBase* parent;
Color color;
QMapNodeBase* minimum() {
QMapNodeBase* x = this;
while ( x->left )
x = x->left;
return x;
}
QMapNodeBase* maximum() {
QMapNodeBase* x = this;
while ( x->right )
x = x->right;
return x;
}
};
template <class K, class T>
struct QMapNode : public QMapNodeBase
{
QMapNode( const K& _key, const T& _data ) { data = _data; key = _key; }
QMapNode( const K& _key ) { key = _key; }
QMapNode( const QMapNode<K,T>& _n ) { key = _n.key; data = _n.data; }
QMapNode() { }
T data;
K key;
};
template<class K, class T>
#ifdef Q_NO_TEMPLATE_EXPORT
class QMapIterator
#else
class Q_EXPORT QMapIterator
#endif
{
public:
/**
* Typedefs
*/
typedef QMapNode< K, T >* NodePtr;
#ifndef QT_NO_STL
typedef std::bidirectional_iterator_tag iterator_category;
#endif
typedef T value_type;
#ifndef QT_NO_STL
typedef ptrdiff_t difference_type;
#else
typedef int difference_type;
#endif
typedef T* pointer;
typedef T& reference;
/**
* Variables
*/
QMapNode<K,T>* node;
/**
* Functions
*/
QMapIterator() : node( 0 ) {}
QMapIterator( QMapNode<K,T>* p ) : node( p ) {}
QMapIterator( const QMapIterator<K,T>& it ) : node( it.node ) {}
bool operator==( const QMapIterator<K,T>& it ) const { return node == it.node; }
bool operator!=( const QMapIterator<K,T>& it ) const { return node != it.node; }
T& operator*() { return node->data; }
const T& operator*() const { return node->data; }
// UDT for T = x*
// T* operator->() const { return &node->data; }
const K& key() const { return node->key; }
T& data() { return node->data; }
const T& data() const { return node->data; }
private:
int inc() {
QMapNodeBase* tmp = node;
if ( tmp->right ) {
tmp = tmp->right;
while ( tmp->left )
tmp = tmp->left;
} else {
QMapNodeBase* y = tmp->parent;
while (tmp == y->right) {
tmp = y;
y = y->parent;
}
if (tmp->right != y)
tmp = y;
}
node = (NodePtr)tmp;
return 0;
}
int dec() {
QMapNodeBase* tmp = node;
if (tmp->color == QMapNodeBase::Red &&
tmp->parent->parent == tmp ) {
tmp = tmp->right;
} else if (tmp->left != 0) {
QMapNodeBase* y = tmp->left;
while ( y->right )
y = y->right;
tmp = y;
} else {
QMapNodeBase* y = tmp->parent;
while (tmp == y->left) {
tmp = y;
y = y->parent;
}
tmp = y;
}
node = (NodePtr)tmp;
return 0;
}
public:
QMapIterator<K,T>& operator++() {
inc();
return *this;
}
QMapIterator<K,T> operator++(int) {
QMapIterator<K,T> tmp = *this;
inc();
return tmp;
}
QMapIterator<K,T>& operator--() {
dec();
return *this;
}
QMapIterator<K,T> operator--(int) {
QMapIterator<K,T> tmp = *this;
dec();
return tmp;
}
};
template<class K, class T>
#ifdef Q_NO_TEMPLATE_EXPORT
class QMapConstIterator
#else
class Q_EXPORT QMapConstIterator
#endif
{
public:
/**
* Typedefs
*/
typedef QMapNode< K, T >* NodePtr;
#ifndef QT_NO_STL
typedef std::bidirectional_iterator_tag iterator_category;
#endif
typedef T value_type;
#ifndef QT_NO_STL
typedef ptrdiff_t difference_type;
#else
typedef int difference_type;
#endif
typedef const T* pointer;
typedef const T& reference;
/**
* Variables
*/
QMapNode<K,T>* node;
/**
* Functions
*/
QMapConstIterator() : node( 0 ) {}
QMapConstIterator( QMapNode<K,T>* p ) : node( p ) {}
QMapConstIterator( const QMapConstIterator<K,T>& it ) : node( it.node ) {}
QMapConstIterator( const QMapIterator<K,T>& it ) : node( it.node ) {}
bool operator==( const QMapConstIterator<K,T>& it ) const { return node == it.node; }
bool operator!=( const QMapConstIterator<K,T>& it ) const { return node != it.node; }
const T& operator*() const { return node->data; }
// UDT for T = x*
// const T* operator->() const { return &node->data; }
const K& key() const { return node->key; }
const T& data() const { return node->data; }
private:
int inc() {
QMapNodeBase* tmp = node;
if ( tmp->right ) {
tmp = tmp->right;
while ( tmp->left )
tmp = tmp->left;
} else {
QMapNodeBase* y = tmp->parent;
while (tmp == y->right) {
tmp = y;
y = y->parent;
}
if (tmp->right != y)
tmp = y;
}
node = (NodePtr)tmp;
return 0;
}
int dec() {
QMapNodeBase* tmp = node;
if (tmp->color == QMapNodeBase::Red &&
tmp->parent->parent == tmp ) {
tmp = tmp->right;
} else if (tmp->left != 0) {
QMapNodeBase* y = tmp->left;
while ( y->right )
y = y->right;
tmp = y;
} else {
QMapNodeBase* y = tmp->parent;
while (tmp == y->left) {
tmp = y;
y = y->parent;
}
tmp = y;
}
node = (NodePtr)tmp;
return 0;
}
public:
QMapConstIterator<K,T>& operator++() {
inc();
return *this;
}
QMapConstIterator<K,T> operator++(int) {
QMapConstIterator<K,T> tmp = *this;
inc();
return tmp;
}
QMapConstIterator<K,T>& operator--() {
dec();
return *this;
}
QMapConstIterator<K,T> operator--(int) {
QMapConstIterator<K,T> tmp = *this;
dec();
return tmp;
}
};
class Q_EXPORT QMapPrivateBase : public QShared
{
public:
QMapPrivateBase() {
node_count = 0;
}
QMapPrivateBase( const QMapPrivateBase* _map) {
node_count = _map->node_count;
}
/**
* Implementations of basic tree algorithms
*/
void rotateLeft( QMapNodeBase* x, QMapNodeBase*& root);
void rotateRight( QMapNodeBase* x, QMapNodeBase*& root );
void rebalance( QMapNodeBase* x, QMapNodeBase*& root );
QMapNodeBase* removeAndRebalance( QMapNodeBase* z, QMapNodeBase*& root,
QMapNodeBase*& leftmost,
QMapNodeBase*& rightmost );
/**
* Variables
*/
int node_count;
};
template <class Key, class T>
class QMapPrivate : public QMapPrivateBase
{
public:
/**
* Typedefs
*/
typedef QMapIterator< Key, T > Iterator;
typedef QMapConstIterator< Key, T > ConstIterator;
typedef QMapNode< Key, T > Node;
typedef QMapNode< Key, T >* NodePtr;
/**
* Functions
*/
QMapPrivate() {
header = new Node;
header->color = QMapNodeBase::Red; // Mark the header
header->parent = 0;
header->left = header->right = header;
}
QMapPrivate( const QMapPrivate< Key, T >* _map ) : QMapPrivateBase( _map ) {
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();
}
}
~QMapPrivate() { clear(); delete header; }
NodePtr copy( 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;
}
void clear() {
clear( (NodePtr)(header->parent) );
header->color = QMapNodeBase::Red;
header->parent = 0;
header->left = header->right = header;
node_count = 0;
}
void clear( NodePtr p ) {
while ( p != 0 ) {
clear( (NodePtr)p->right );
NodePtr y = (NodePtr)p->left;
delete p;
p = y;
}
}
Iterator begin() { return Iterator( (NodePtr)(header->left ) ); }
Iterator end() { return Iterator( header ); }
ConstIterator begin() const { return ConstIterator( (NodePtr)(header->left ) ); }
ConstIterator end() const { return ConstIterator( header ); }
ConstIterator 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 );
}
void remove( Iterator it ) {
NodePtr del = (NodePtr) removeAndRebalance( it.node, header->parent, header->left, header->right );
delete del;
--node_count;
}
#ifdef QT_QMAP_DEBUG
void inorder( QMapNodeBase* x = 0, int level = 0 ){
if ( !x )
x = header->parent;
if ( x->left )
inorder( x->left, level + 1 );
//cout << level << " Key=" << key(x) << " Value=" << ((NodePtr)x)->data << endl;
if ( x->right )
inorder( x->right, level + 1 );
}
#endif
#if 0
Iterator insertMulti(const Key& v){
QMapNodeBase* y = header;
QMapNodeBase* x = header->parent;
while (x != 0){
y = x;
x = ( v < key(x) ) ? x->left : x->right;
}
return insert(x, y, v);
}
#endif
Iterator 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;
}
Iterator 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);
}
protected:
/**
* Helpers
*/
const Key& key( QMapNodeBase* b ) const { return ((NodePtr)b)->key; }
/**
* Variables
*/
NodePtr header;
};
#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 Key, class T>
#ifdef Q_NO_TEMPLATE_EXPORT
class QMap
#else
class Q_EXPORT QMap
#endif
{
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;
/**
* API
*/
QMap()
{
sh = new QMapPrivate< Key, T >;
}
QMap( const QMap<Key,T>& m )
{
sh = m.sh; sh->ref();
}
#ifndef QT_NO_STL
QMap( const Q_TYPENAME std::map<Key,T>& m )
{
sh = new QMapPrivate<Key,T>;
#if defined(Q_OS_WIN32)
std::map<Key,T>::const_iterator it = m.begin();
#else
QMapConstIterator<Key,T> it = m.begin();
#endif
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 )
{
m.sh->ref();
if ( sh->deref() )
delete sh;
sh = m.sh;
return *this;
}
#ifndef QT_NO_STL
QMap<Key,T>& operator= ( const Q_TYPENAME std::map<Key,T>& m )
{
clear();
#if defined(Q_OS_WIN32)
std::map<Key,T>::const_iterator it = m.begin();
#else
QMapConstIterator<Key,T> it = m.begin();
#endif
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();
}
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 )
{
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 );
}
void erase( iterator it )
{
detach();
sh->remove( it );
}
void erase( const key_type& k )
{
detach();
iterator it( sh->find( k ).node );
if ( it != end() )
sh->remove( it );
}
size_type count( const key_type& 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;
}
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();
}
void clear()
{
if ( sh->count == 1 )
sh->clear();
else {
sh->deref();
sh = new QMapPrivate<Key,T>;
}
}
typedef QMapIterator< Key, T > Iterator;
typedef QMapConstIterator< Key, T > ConstIterator;
typedef T ValueType;
typedef QMapPrivate< Key, T > Priv;
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; }
bool isEmpty() const { return sh->node_count == 0; }
iterator insert( const Key& key, const T& value, bool overwrite = TRUE ) {
detach();
size_type n = size();
iterator it = sh->insertSingle( key );
if ( overwrite || n < size() )
it.data() = value;
return it;
}
void remove( iterator it ) { detach(); sh->remove( it ); }
void remove( const Key& k ) {
detach();
iterator it( sh->find( k ).node );
if ( it != end() )
sh->remove( it );
}
#if defined(Q_FULL_TEMPLATE_INSTANTIATION)
bool operator==( const QMap<Key,T>& ) const { return FALSE; }
#ifndef QT_NO_STL
bool operator==( const Q_TYPENAME std::map<Key,T>& ) const { return FALSE; }
#endif
#endif
protected:
/**
* Helpers
*/
void detach() { if ( sh->count > 1 ) { sh->deref(); sh = new QMapPrivate<Key,T>( sh ); } }
Priv* sh;
};
#ifndef QT_NO_DATASTREAM
template<class Key, class T>
inline 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>
inline 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
#endif // QMAP_H
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