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1/****************************************************************************
2** $Id$
3**
4** Definition of QValueList class
5**
6** Created : 990406
7**
8** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
9**
10** This file is part of the tools module of the Qt GUI Toolkit.
11**
12** This file may be distributed under the terms of the Q Public License
13** as defined by Trolltech AS of Norway and appearing in the file
14** LICENSE.QPL included in the packaging of this file.
15**
16** This file may be distributed and/or modified under the terms of the
17** GNU General Public License version 2 as published by the Free Software
18** Foundation and appearing in the file LICENSE.GPL included in the
19** packaging of this file.
20**
21** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
22** licenses may use this file in accordance with the Qt Commercial License
23** Agreement provided with the Software.
24**
25** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
26** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
27**
28** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
29** information about Qt Commercial License Agreements.
30** See http://www.trolltech.com/qpl/ for QPL licensing information.
31** See http://www.trolltech.com/gpl/ for GPL licensing information.
32**
33** Contact info@trolltech.com if any conditions of this licensing are
34** not clear to you.
35**
36**********************************************************************/
37
38#ifndef QVALUELIST_H
39#define QVALUELIST_H
40
41#ifndef QT_H
42#include "qtl.h"
43#include "qshared.h"
44#include "qdatastream.h"
45#endif // QT_H
46
47#ifndef QT_NO_STL
48#include <iterator>
49#include <list>
50#endif
51
52//#define QT_CHECK_VALUELIST_RANGE
53
54#if defined(Q_CC_MSVC)
55#pragma warning(disable:4284) // "return type for operator -> is not a UDT"
56#endif
57
58template <class T>
59class QValueListNode
60{
61public:
62 QValueListNode( const T& t ) : data( t ) { }
63 QValueListNode() { }
64#if defined(Q_TEMPLATEDLL)
65 // Workaround MS bug in memory de/allocation in DLL vs. EXE
66 virtual ~QValueListNode() { }
67#endif
68
69 QValueListNode<T>* next;
70 QValueListNode<T>* prev;
71 T data;
72};
73
74template<class T>
75class QValueListIterator
76{
77 public:
78 /**
79 * Typedefs
80 */
81 typedef QValueListNode<T>* NodePtr;
82#ifndef QT_NO_STL
83 typedef std::bidirectional_iterator_tag iterator_category;
84#endif
85 typedef T value_type;
86 typedef size_t size_type;
87#ifndef QT_NO_STL
88 typedef ptrdiff_t difference_type;
89#else
90 typedef int difference_type;
91#endif
92 typedef T* pointer;
93 typedef T& reference;
94
95 /**
96 * Variables
97 */
98 NodePtr node;
99
100 /**
101 * Functions
102 */
103 QValueListIterator() : node( 0 ) {}
104 QValueListIterator( NodePtr p ) : node( p ) {}
105 QValueListIterator( const QValueListIterator<T>& it ) : node( it.node ) {}
106
107 bool operator==( const QValueListIterator<T>& it ) const { return node == it.node; }
108 bool operator!=( const QValueListIterator<T>& it ) const { return node != it.node; }
109 const T& operator*() const { return node->data; }
110 T& operator*() { return node->data; }
111 // UDT for T = x*
112 // T* operator->() const { return &node->data; }
113
114 QValueListIterator<T>& operator++() {
115 node = node->next;
116 return *this;
117 }
118
119 QValueListIterator<T> operator++(int) {
120 QValueListIterator<T> tmp = *this;
121 node = node->next;
122 return tmp;
123 }
124
125 QValueListIterator<T>& operator--() {
126 node = node->prev;
127 return *this;
128 }
129
130 QValueListIterator<T> operator--(int) {
131 QValueListIterator<T> tmp = *this;
132 node = node->prev;
133 return tmp;
134 }
135
136 QValueListIterator<T>& operator+=( int j ) {
137 while ( j-- )
138 node = node->next;
139 return *this;
140 }
141
142 QValueListIterator<T>& operator-=( int j ) {
143 while ( j-- )
144 node = node->prev;
145 return *this;
146 }
147
148};
149
150template<class T>
151class QValueListConstIterator
152{
153 public:
154 /**
155 * Typedefs
156 */
157 typedef QValueListNode<T>* NodePtr;
158#ifndef QT_NO_STL
159 typedef std::bidirectional_iterator_tag iterator_category;
160#endif
161 typedef T value_type;
162 typedef size_t size_type;
163#ifndef QT_NO_STL
164 typedef ptrdiff_t difference_type;
165#else
166 typedef int difference_type;
167#endif
168 typedef const T* pointer;
169 typedef const T& reference;
170
171 /**
172 * Variables
173 */
174 NodePtr node;
175
176 /**
177 * Functions
178 */
179 QValueListConstIterator() : node( 0 ) {}
180 QValueListConstIterator( NodePtr p ) : node( p ) {}
181 QValueListConstIterator( const QValueListConstIterator<T>& it ) : node( it.node ) {}
182 QValueListConstIterator( const QValueListIterator<T>& it ) : node( it.node ) {}
183
184 bool operator==( const QValueListConstIterator<T>& it ) const { return node == it.node; }
185 bool operator!=( const QValueListConstIterator<T>& it ) const { return node != it.node; }
186 const T& operator*() const { return node->data; }
187 // UDT for T = x*
188 // const T* operator->() const { return &node->data; }
189
190 QValueListConstIterator<T>& operator++() {
191 node = node->next;
192 return *this;
193 }
194
195 QValueListConstIterator<T> operator++(int) {
196 QValueListConstIterator<T> tmp = *this;
197 node = node->next;
198 return tmp;
199 }
200
201 QValueListConstIterator<T>& operator--() {
202 node = node->prev;
203 return *this;
204 }
205
206 QValueListConstIterator<T> operator--(int) {
207 QValueListConstIterator<T> tmp = *this;
208 node = node->prev;
209 return tmp;
210 }
211};
212
213template <class T>
214class QValueListPrivate : public QShared
215{
216public:
217 /**
218 * Typedefs
219 */
220 typedef QValueListIterator<T> Iterator;
221 typedef QValueListConstIterator<T> ConstIterator;
222 typedef QValueListNode<T> Node;
223 typedef QValueListNode<T>* NodePtr;
224 typedef size_t size_type;
225
226 /**
227 * Functions
228 */
229 QValueListPrivate();
230 QValueListPrivate( const QValueListPrivate<T>& _p );
231
232 void derefAndDelete() // ### hack to get around hp-cc brain damage
233 {
234 if ( deref() )
235 delete this;
236 }
237
238#if defined(Q_TEMPLATEDLL)
239 // Workaround MS bug in memory de/allocation in DLL vs. EXE
240 virtual
241#endif
242 ~QValueListPrivate();
243
244 Iterator insert( Iterator it, const T& x );
245 Iterator remove( Iterator it );
246 NodePtr find( NodePtr start, const T& x ) const;
247 int findIndex( NodePtr start, const T& x ) const;
248 uint contains( const T& x ) const;
249 uint remove( const T& x );
250 NodePtr at( size_type i ) const;
251 void clear();
252
253 NodePtr node;
254 size_type nodes;
255};
256
257template <class T>
258Q_INLINE_TEMPLATES QValueListPrivate<T>::QValueListPrivate()
259{
260 node = new Node; node->next = node->prev = node; nodes = 0;
261}
262
263template <class T>
264Q_INLINE_TEMPLATES QValueListPrivate<T>::QValueListPrivate( const QValueListPrivate<T>& _p )
265 : QShared()
266{
267 node = new Node; node->next = node->prev = node; nodes = 0;
268 Iterator b( _p.node->next );
269 Iterator e( _p.node );
270 Iterator i( node );
271 while( b != e )
272 insert( i, *b++ );
273}
274
275template <class T>
276Q_INLINE_TEMPLATES QValueListPrivate<T>::~QValueListPrivate() {
277 NodePtr p = node->next;
278 while( p != node ) {
279 NodePtr x = p->next;
280 delete p;
281 p = x;
282 }
283 delete node;
284}
285
286template <class T>
287Q_INLINE_TEMPLATES Q_TYPENAME QValueListPrivate<T>::Iterator QValueListPrivate<T>::insert( Q_TYPENAME QValueListPrivate<T>::Iterator it, const T& x )
288{
289 NodePtr p = new Node( x );
290 p->next = it.node;
291 p->prev = it.node->prev;
292 it.node->prev->next = p;
293 it.node->prev = p;
294 nodes++;
295 return p;
296}
297
298template <class T>
299Q_INLINE_TEMPLATES Q_TYPENAME QValueListPrivate<T>::Iterator QValueListPrivate<T>::remove( Q_TYPENAME QValueListPrivate<T>::Iterator it )
300{
301 Q_ASSERT ( it.node != node );
302 NodePtr next = it.node->next;
303 NodePtr prev = it.node->prev;
304 prev->next = next;
305 next->prev = prev;
306 delete it.node;
307 nodes--;
308 return Iterator( next );
309}
310
311template <class T>
312Q_INLINE_TEMPLATES Q_TYPENAME QValueListPrivate<T>::NodePtr QValueListPrivate<T>::find( Q_TYPENAME QValueListPrivate<T>::NodePtr start, const T& x ) const
313{
314 ConstIterator first( start );
315 ConstIterator last( node );
316 while( first != last) {
317 if ( *first == x )
318 return first.node;
319 ++first;
320 }
321 return last.node;
322}
323
324template <class T>
325Q_INLINE_TEMPLATES int QValueListPrivate<T>::findIndex( Q_TYPENAME QValueListPrivate<T>::NodePtr start, const T& x ) const
326{
327 ConstIterator first( start );
328 ConstIterator last( node );
329 int pos = 0;
330 while( first != last) {
331 if ( *first == x )
332 return pos;
333 ++first;
334 ++pos;
335 }
336 return -1;
337}
338
339template <class T>
340Q_INLINE_TEMPLATES uint QValueListPrivate<T>::contains( const T& x ) const
341{
342 uint result = 0;
343 Iterator first = Iterator( node->next );
344 Iterator last = Iterator( node );
345 while( first != last) {
346 if ( *first == x )
347 ++result;
348 ++first;
349 }
350 return result;
351}
352
353template <class T>
354Q_INLINE_TEMPLATES uint QValueListPrivate<T>::remove( const T& x )
355{
356 uint result = 0;
357 Iterator first = Iterator( node->next );
358 Iterator last = Iterator( node );
359 while( first != last) {
360 if ( *first == x ) {
361 first = remove( first );
362 ++result;
363 } else
364 ++first;
365 }
366 return result;
367}
368
369template <class T>
370Q_INLINE_TEMPLATES Q_TYPENAME QValueListPrivate<T>::NodePtr QValueListPrivate<T>::at( size_type i ) const
371{
372 Q_ASSERT( i <= nodes );
373 NodePtr p = node->next;
374 for( size_type x = 0; x < i; ++x )
375 p = p->next;
376 return p;
377}
378
379template <class T>
380Q_INLINE_TEMPLATES void QValueListPrivate<T>::clear()
381{
382 nodes = 0;
383 NodePtr p = node->next;
384 while( p != node ) {
385 NodePtr next = p->next;
386 delete p;
387 p = next;
388 }
389 node->next = node->prev = node;
390}
391
392#ifdef QT_CHECK_RANGE
393# if !defined( QT_NO_DEBUG ) && defined( QT_CHECK_VALUELIST_RANGE )
394# define QT_CHECK_INVALID_LIST_ELEMENT if ( empty() ) qWarning( "QValueList: Warning invalid element" )
395# define QT_CHECK_INVALID_LIST_ELEMENT_FATAL Q_ASSERT( !empty() );
396# else
397# define QT_CHECK_INVALID_LIST_ELEMENT
398# define QT_CHECK_INVALID_LIST_ELEMENT_FATAL
399# endif
400#else
401# define QT_CHECK_INVALID_LIST_ELEMENT
402# define QT_CHECK_INVALID_LIST_ELEMENT_FATAL
403#endif
404
405template <class T> class QDeepCopy;
406
407template <class T>
408class QValueList
409{
410public:
411 /**
412 * Typedefs
413 */
414 typedef QValueListIterator<T> iterator;
415 typedef QValueListConstIterator<T> const_iterator;
416 typedef T value_type;
417 typedef value_type* pointer;
418 typedef const value_type* const_pointer;
419 typedef value_type& reference;
420 typedef const value_type& const_reference;
421 typedef size_t size_type;
422#ifndef QT_NO_STL
423 typedef ptrdiff_t difference_type;
424#else
425 typedef int difference_type;
426#endif
427
428 /**
429 * API
430 */
431 QValueList() { sh = new QValueListPrivate<T>; }
432 QValueList( const QValueList<T>& l ) { sh = l.sh; sh->ref(); }
433#ifndef QT_NO_STL
434# ifdef Q_CC_HPACC // HP-UX aCC does require typename in some place
435# undef Q_TYPENAME // but not accept them at others.
436# define Q_TYPENAME // also doesn't like re-defines ...
437# endif
438 QValueList( const Q_TYPENAME std::list<T>& l )
439 {
440 sh = new QValueListPrivate<T>;
441 qCopy( l.begin(), l.end(), std::back_inserter( *this ) );
442 }
443#endif
444 ~QValueList() { sh->derefAndDelete(); }
445
446 QValueList<T>& operator= ( const QValueList<T>& l )
447 {
448 l.sh->ref();
449 sh->derefAndDelete();
450 sh = l.sh;
451 return *this;
452 }
453#ifndef QT_NO_STL
454 QValueList<T>& operator= ( const Q_TYPENAME std::list<T>& l )
455 {
456 detach();
457 qCopy( l.begin(), l.end(), std::back_inserter( *this ) );
458 return *this;
459 }
460 bool operator== ( const Q_TYPENAME std::list<T>& l ) const
461 {
462 if ( size() != l.size() )
463 return FALSE;
464 const_iterator it2 = begin();
465#if !defined(Q_CC_MIPS)
466 typename
467#endif
468 std::list<T>::const_iterator it = l.begin();
469 for ( ; it2 != end(); ++it2, ++it )
470 if ( !((*it2) == (*it)) )
471 return FALSE;
472 return TRUE;
473 }
474# ifdef Q_CC_HPACC // undo the HP-UX aCC hackery done above
475# undef Q_TYPENAME
476# define Q_TYPENAME typename
477# endif
478#endif
479 bool operator== ( const QValueList<T>& l ) const;
480 bool operator!= ( const QValueList<T>& l ) const { return !( *this == l ); }
481 iterator begin() { detach(); return iterator( sh->node->next ); }
482 const_iterator begin() const { return const_iterator( sh->node->next ); }
483 iterator end() { detach(); return iterator( sh->node ); }
484 const_iterator end() const { return const_iterator( sh->node ); }
485 iterator insert( iterator it, const T& x ) { detach(); return sh->insert( it, x ); }
486 uint remove( const T& x ) { detach(); return sh->remove( x ); }
487 void clear();
488
489 QValueList<T>& operator<< ( const T& x )
490 {
491 append( x );
492 return *this;
493 }
494
495 size_type size() const { return sh->nodes; }
496 bool empty() const { return sh->nodes == 0; }
497 void push_front( const T& x ) { detach(); sh->insert( begin(), x ); }
498 void push_back( const T& x ) { detach(); sh->insert( end(), x ); }
499 iterator erase( iterator pos ) { detach(); return sh->remove( pos ); }
500 iterator erase( iterator first, iterator last );
501 reference front() { QT_CHECK_INVALID_LIST_ELEMENT_FATAL; return *begin(); }
502 const_reference front() const { QT_CHECK_INVALID_LIST_ELEMENT_FATAL; return *begin(); }
503 reference back() { QT_CHECK_INVALID_LIST_ELEMENT_FATAL; return *(--end()); }
504 const_reference back() const { QT_CHECK_INVALID_LIST_ELEMENT_FATAL; return *(--end()); }
505 void pop_front() { QT_CHECK_INVALID_LIST_ELEMENT; erase( begin() ); }
506 void pop_back() {
507 QT_CHECK_INVALID_LIST_ELEMENT;
508 iterator tmp = end();
509 erase( --tmp );
510 }
511 void insert( iterator pos, size_type n, const T& x );
512 // Some compilers (incl. vc++) would instantiate this function even if
513 // it is not used; this would constrain QValueList to classes that provide
514 // an operator<
515 /*
516 void sort()
517 {
518 qHeapSort( *this );
519 }
520 */
521
522 QValueList<T> operator+ ( const QValueList<T>& l ) const;
523 QValueList<T>& operator+= ( const QValueList<T>& l );
524
525 iterator fromLast() { detach(); return iterator( sh->node->prev ); }
526 const_iterator fromLast() const { return const_iterator( sh->node->prev ); }
527
528 bool isEmpty() const { return ( sh->nodes == 0 ); }
529
530 iterator append( const T& x ) { detach(); return sh->insert( end(), x ); }
531 iterator prepend( const T& x ) { detach(); return sh->insert( begin(), x ); }
532
533 iterator remove( iterator it ) { detach(); return sh->remove( it ); }
534
535 T& first() { QT_CHECK_INVALID_LIST_ELEMENT; detach(); return sh->node->next->data; }
536 const T& first() const { QT_CHECK_INVALID_LIST_ELEMENT; return sh->node->next->data; }
537 T& last() { QT_CHECK_INVALID_LIST_ELEMENT; detach(); return sh->node->prev->data; }
538 const T& last() const { QT_CHECK_INVALID_LIST_ELEMENT; return sh->node->prev->data; }
539
540 T& operator[] ( size_type i ) { QT_CHECK_INVALID_LIST_ELEMENT; detach(); return sh->at(i)->data; }
541 const T& operator[] ( size_type i ) const { QT_CHECK_INVALID_LIST_ELEMENT; return sh->at(i)->data; }
542 iterator at( size_type i ) { QT_CHECK_INVALID_LIST_ELEMENT; detach(); return iterator( sh->at(i) ); }
543 const_iterator at( size_type i ) const { QT_CHECK_INVALID_LIST_ELEMENT; return const_iterator( sh->at(i) ); }
544 iterator find ( const T& x ) { detach(); return iterator( sh->find( sh->node->next, x) ); }
545 const_iterator find ( const T& x ) const { return const_iterator( sh->find( sh->node->next, x) ); }
546 iterator find ( iterator it, const T& x ) { detach(); return iterator( sh->find( it.node, x ) ); }
547 const_iterator find ( const_iterator it, const T& x ) const { return const_iterator( sh->find( it.node, x ) ); }
548 int findIndex( const T& x ) const { return sh->findIndex( sh->node->next, x) ; }
549 size_type contains( const T& x ) const { return sh->contains( x ); }
550
551 size_type count() const { return sh->nodes; }
552
553 QValueList<T>& operator+= ( const T& x )
554 {
555 append( x );
556 return *this;
557 }
558 typedef QValueListIterator<T> Iterator;
559 typedef QValueListConstIterator<T> ConstIterator;
560 typedef T ValueType;
561
562protected:
563 /**
564 * Helpers
565 */
566 void detach() { if ( sh->count > 1 ) detachInternal(); }
567
568 /**
569 * Variables
570 */
571 QValueListPrivate<T>* sh;
572
573private:
574 void detachInternal();
575
576 friend class QDeepCopy< QValueList<T> >;
577};
578
579template <class T>
580Q_INLINE_TEMPLATES bool QValueList<T>::operator== ( const QValueList<T>& l ) const
581{
582 if ( size() != l.size() )
583 return FALSE;
584 const_iterator it2 = begin();
585 const_iterator it = l.begin();
586 for( ; it != l.end(); ++it, ++it2 )
587 if ( !( *it == *it2 ) )
588 return FALSE;
589 return TRUE;
590}
591
592template <class T>
593Q_INLINE_TEMPLATES void QValueList<T>::clear()
594{
595 if ( sh->count == 1 ) sh->clear(); else { sh->deref(); sh = new QValueListPrivate<T>; }
596}
597
598template <class T>
599Q_INLINE_TEMPLATES Q_TYPENAME QValueList<T>::iterator QValueList<T>::erase( Q_TYPENAME QValueList<T>::iterator first, Q_TYPENAME QValueList<T>::iterator last )
600{
601 while ( first != last )
602 erase( first++ );
603 return last;
604}
605
606
607template <class T>
608Q_INLINE_TEMPLATES void QValueList<T>::insert( Q_TYPENAME QValueList<T>::iterator pos, size_type n, const T& x )
609{
610 for ( ; n > 0; --n )
611 insert( pos, x );
612}
613
614template <class T>
615Q_INLINE_TEMPLATES QValueList<T> QValueList<T>::operator+ ( const QValueList<T>& l ) const
616{
617 QValueList<T> l2( *this );
618 for( const_iterator it = l.begin(); it != l.end(); ++it )
619 l2.append( *it );
620 return l2;
621}
622
623template <class T>
624Q_INLINE_TEMPLATES QValueList<T>& QValueList<T>::operator+= ( const QValueList<T>& l )
625{
626 for( const_iterator it = l.begin(); it != l.end(); ++it )
627 append( *it );
628 return *this;
629}
630
631template <class T>
632Q_INLINE_TEMPLATES void QValueList<T>::detachInternal()
633{
634 sh->deref(); sh = new QValueListPrivate<T>( *sh );
635}
636
637#ifndef QT_NO_DATASTREAM
638template <class T>
639Q_INLINE_TEMPLATES QDataStream& operator>>( QDataStream& s, QValueList<T>& l )
640{
641 l.clear();
642 Q_UINT32 c;
643 s >> c;
644 for( Q_UINT32 i = 0; i < c; ++i )
645 {
646 T t;
647 s >> t;
648 l.append( t );
649 if ( s.atEnd() )
650 break;
651 }
652 return s;
653}
654
655template <class T>
656Q_INLINE_TEMPLATES QDataStream& operator<<( QDataStream& s, const QValueList<T>& l )
657{
658 s << (Q_UINT32)l.size();
659 QValueListConstIterator<T> it = l.begin();
660 for( ; it != l.end(); ++it )
661 s << *it;
662 return s;
663}
664#endif // QT_NO_DATASTREAM
665#endif // QVALUELIST_H