684 lines
13 KiB
C++
684 lines
13 KiB
C++
/*
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* Copyright 2005-2009, Ingo Weinhold, bonefish@users.sf.net.
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* Copyright 2006-2009, Axel Dörfler, axeld@pinc-software.de.
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*
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* Distributed under the terms of the MIT License.
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*/
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#ifndef KERNEL_UTIL_DOUBLY_LINKED_LIST_H
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#define KERNEL_UTIL_DOUBLY_LINKED_LIST_H
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#include <SupportDefs.h>
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#ifdef _KERNEL_MODE
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# include <debug.h>
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# include <util/kernel_cpp.h>
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# if !defined(_BOOT_MODE) && KDEBUG
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# define DEBUG_DOUBLY_LINKED_LIST KDEBUG
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# endif
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#endif
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#ifdef __cplusplus
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// DoublyLinkedListLink
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template<typename Element>
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class DoublyLinkedListLink {
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public:
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Element* next;
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Element* previous;
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};
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// DoublyLinkedListLinkImpl
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template<typename Element>
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class DoublyLinkedListLinkImpl {
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private:
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typedef DoublyLinkedListLink<Element> DLL_Link;
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public:
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DLL_Link* GetDoublyLinkedListLink()
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{ return &fDoublyLinkedListLink; }
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const DLL_Link* GetDoublyLinkedListLink() const
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{ return &fDoublyLinkedListLink; }
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private:
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DLL_Link fDoublyLinkedListLink;
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};
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// DoublyLinkedListStandardGetLink
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template<typename Element>
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class DoublyLinkedListStandardGetLink {
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private:
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typedef DoublyLinkedListLink<Element> Link;
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public:
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inline Link* operator()(Element* element) const
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{
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return element->GetDoublyLinkedListLink();
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}
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inline const Link* operator()(const Element* element) const
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{
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return element->GetDoublyLinkedListLink();
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}
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};
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// DoublyLinkedListMemberGetLink
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template<typename Element,
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DoublyLinkedListLink<Element> Element::* LinkMember = &Element::fLink>
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class DoublyLinkedListMemberGetLink {
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private:
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typedef DoublyLinkedListLink<Element> Link;
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public:
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inline Link* operator()(Element* element) const
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{
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return &(element->*LinkMember);
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}
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inline const Link* operator()(const Element* element) const
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{
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return &(element->*LinkMember);
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}
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};
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// DoublyLinkedListCLink - interface to struct list
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template<typename Element>
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class DoublyLinkedListCLink {
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private:
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typedef DoublyLinkedListLink<Element> Link;
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public:
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inline Link* operator()(Element* element) const
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{
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return (Link*)&element->link;
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}
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inline const Link* operator()(const Element* element) const
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{
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return (const Link*)&element->link;
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}
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};
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// for convenience
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#define DOUBLY_LINKED_LIST_TEMPLATE_LIST \
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template<typename Element, typename GetLink>
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#define DOUBLY_LINKED_LIST_CLASS_NAME DoublyLinkedList<Element, GetLink>
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// DoublyLinkedList
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template<typename Element,
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typename GetLink = DoublyLinkedListStandardGetLink<Element> >
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class DoublyLinkedList {
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private:
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typedef DoublyLinkedList<Element, GetLink> List;
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typedef DoublyLinkedListLink<Element> Link;
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public:
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class Iterator {
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public:
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Iterator(List* list)
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:
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fList(list)
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{
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Rewind();
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}
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Iterator()
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{
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}
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Iterator(const Iterator &other)
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{
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*this = other;
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}
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bool HasNext() const
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{
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return fNext;
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}
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Element* Next()
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{
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fCurrent = fNext;
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if (fNext)
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fNext = fList->GetNext(fNext);
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return fCurrent;
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}
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Element* Current()
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{
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return fCurrent;
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}
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Element* Remove()
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{
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Element* element = fCurrent;
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if (fCurrent) {
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fList->Remove(fCurrent);
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fCurrent = NULL;
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}
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return element;
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}
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Iterator &operator=(const Iterator& other)
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{
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fList = other.fList;
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fCurrent = other.fCurrent;
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fNext = other.fNext;
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return *this;
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}
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void Rewind()
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{
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fCurrent = NULL;
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fNext = fList->First();
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}
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private:
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List* fList;
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Element* fCurrent;
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Element* fNext;
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};
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class ConstIterator {
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public:
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ConstIterator(const List* list)
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:
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fList(list)
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{
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Rewind();
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}
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ConstIterator(const ConstIterator& other)
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{
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*this = other;
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}
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bool HasNext() const
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{
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return fNext;
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}
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Element* Next()
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{
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Element* element = fNext;
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if (fNext)
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fNext = fList->GetNext(fNext);
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return element;
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}
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ConstIterator& operator=(const ConstIterator& other)
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{
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fList = other.fList;
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fNext = other.fNext;
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return *this;
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}
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void Rewind()
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{
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fNext = fList->First();
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}
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private:
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const List* fList;
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Element* fNext;
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};
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class ReverseIterator {
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public:
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ReverseIterator(List* list)
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:
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fList(list)
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{
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Rewind();
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}
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ReverseIterator(const ReverseIterator& other)
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{
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*this = other;
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}
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bool HasNext() const
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{
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return fNext;
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}
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Element* Next()
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{
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fCurrent = fNext;
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if (fNext)
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fNext = fList->GetPrevious(fNext);
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return fCurrent;
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}
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Element* Remove()
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{
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Element* element = fCurrent;
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if (fCurrent) {
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fList->Remove(fCurrent);
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fCurrent = NULL;
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}
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return element;
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}
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ReverseIterator &operator=(const ReverseIterator& other)
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{
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fList = other.fList;
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fCurrent = other.fCurrent;
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fNext = other.fNext;
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return *this;
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}
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void Rewind()
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{
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fCurrent = NULL;
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fNext = fList->Last();
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}
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private:
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List* fList;
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Element* fCurrent;
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Element* fNext;
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};
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class ConstReverseIterator {
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public:
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ConstReverseIterator(const List* list)
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:
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fList(list)
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{
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Rewind();
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}
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ConstReverseIterator(const ConstReverseIterator& other)
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{
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*this = other;
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}
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bool HasNext() const
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{
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return fNext;
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}
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Element* Next()
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{
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Element* element = fNext;
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if (fNext)
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fNext = fList->GetPrevious(fNext);
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return element;
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}
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ConstReverseIterator& operator=(const ConstReverseIterator& other)
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{
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fList = other.fList;
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fNext = other.fNext;
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return *this;
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}
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void Rewind()
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{
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fNext = fList->Last();
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}
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private:
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const List* fList;
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Element* fNext;
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};
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public:
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DoublyLinkedList() : fFirst(NULL), fLast(NULL) {}
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~DoublyLinkedList() {}
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inline bool IsEmpty() const { return (fFirst == NULL); }
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inline void InsertBefore(Element* insertBefore, Element* element);
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inline void InsertAfter(Element* insertAfter, Element* element);
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inline void Insert(Element* element, bool back = true);
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inline void Insert(Element* before, Element* element);
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// TODO: Obsolete! Use InsertBefore() instead!
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inline void Add(Element* element, bool back = true);
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inline void Remove(Element* element);
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inline void Swap(Element* a, Element* b);
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inline void MoveFrom(DOUBLY_LINKED_LIST_CLASS_NAME* fromList);
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inline void RemoveAll();
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inline void MakeEmpty() { RemoveAll(); }
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inline Element* First() const { return fFirst; }
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inline Element* Last() const { return fLast; }
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inline Element* Head() const { return fFirst; }
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inline Element* Tail() const { return fLast; }
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inline Element* RemoveHead();
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inline Element* RemoveTail();
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inline Element* GetPrevious(Element* element) const;
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inline Element* GetNext(Element* element) const;
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inline bool Contains(Element* element) const;
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// O(n)!
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inline int32 Count() const;
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// O(n)!
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template<typename Less>
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void Sort(const Less& less);
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// O(n^2)
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inline Iterator GetIterator() { return Iterator(this); }
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inline ConstIterator GetIterator() const { return ConstIterator(this); }
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inline ReverseIterator GetReverseIterator()
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{ return ReverseIterator(this); }
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inline ConstReverseIterator GetReverseIterator() const
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{ return ConstReverseIterator(this); }
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private:
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Element* fFirst;
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Element* fLast;
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static GetLink sGetLink;
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};
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// inline methods
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// Insert
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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void
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DOUBLY_LINKED_LIST_CLASS_NAME::Insert(Element* element, bool back)
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{
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if (element) {
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#if DEBUG_DOUBLY_LINKED_LIST
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ASSERT_PRINT(fFirst == NULL ? fLast == NULL : fLast != NULL,
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"list: %p\n", this);
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#endif
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if (back) {
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// append
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Link* elLink = sGetLink(element);
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elLink->previous = fLast;
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elLink->next = NULL;
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if (fLast)
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sGetLink(fLast)->next = element;
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else
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fFirst = element;
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fLast = element;
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} else {
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// prepend
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Link* elLink = sGetLink(element);
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elLink->previous = NULL;
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elLink->next = fFirst;
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if (fFirst)
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sGetLink(fFirst)->previous = element;
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else
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fLast = element;
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fFirst = element;
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}
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}
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}
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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void
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DOUBLY_LINKED_LIST_CLASS_NAME::InsertBefore(Element* before, Element* element)
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{
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ASSERT(element != NULL);
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if (before == NULL) {
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Insert(element);
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return;
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}
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#if DEBUG_DOUBLY_LINKED_LIST
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ASSERT_PRINT(fFirst == NULL ? fLast == NULL : fLast != NULL,
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"list: %p\n", this);
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#endif
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Link* beforeLink = sGetLink(before);
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Link* link = sGetLink(element);
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link->next = before;
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link->previous = beforeLink->previous;
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beforeLink->previous = element;
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if (link->previous != NULL)
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sGetLink(link->previous)->next = element;
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else
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fFirst = element;
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}
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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void
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DOUBLY_LINKED_LIST_CLASS_NAME::InsertAfter(Element* insertAfter,
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Element* element)
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{
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ASSERT(element != NULL);
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#if DEBUG_DOUBLY_LINKED_LIST
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ASSERT_PRINT(fFirst == NULL ? fLast == NULL : fLast != NULL,
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"list: %p\n", this);
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#endif
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if (insertAfter == NULL) {
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// insert at the head
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Link* elLink = sGetLink(element);
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elLink->previous = NULL;
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elLink->next = fFirst;
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if (fFirst != NULL)
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sGetLink(fFirst)->previous = element;
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else
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fLast = element;
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fFirst = element;
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} else {
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Link* afterLink = sGetLink(insertAfter);
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Link* link = sGetLink(element);
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link->previous = insertAfter;
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link->next = afterLink->next;
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afterLink->next = element;
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if (link->next != NULL)
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sGetLink(link->next)->previous = element;
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else
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fLast = element;
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}
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}
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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void
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DOUBLY_LINKED_LIST_CLASS_NAME::Insert(Element* before, Element* element)
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{
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InsertBefore(before, element);
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}
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// Add
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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void
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DOUBLY_LINKED_LIST_CLASS_NAME::Add(Element* element, bool back)
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{
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Insert(element, back);
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}
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// Remove
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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void
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DOUBLY_LINKED_LIST_CLASS_NAME::Remove(Element* element)
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{
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if (element) {
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#if DEBUG_DOUBLY_LINKED_LIST
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ASSERT_PRINT(fFirst != NULL && fLast != NULL
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&& (fFirst != fLast || element == fFirst),
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"list: %p, element: %p\n", this, element);
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#endif
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Link* elLink = sGetLink(element);
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if (elLink->previous)
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sGetLink(elLink->previous)->next = elLink->next;
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else
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fFirst = elLink->next;
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if (elLink->next)
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sGetLink(elLink->next)->previous = elLink->previous;
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else
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fLast = elLink->previous;
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}
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}
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// Swap
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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void
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DOUBLY_LINKED_LIST_CLASS_NAME::Swap(Element* a, Element* b)
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{
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if (a && b && a != b) {
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Element* aNext = sGetLink(a)->next;
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Element* bNext = sGetLink(b)->next;
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if (a == bNext) {
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Remove(a);
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Insert(b, a);
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} else if (b == aNext) {
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Remove(b);
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Insert(a, b);
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} else {
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Remove(a);
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Remove(b);
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Insert(aNext, b);
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Insert(bNext, a);
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}
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}
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}
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// MoveFrom
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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void
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DOUBLY_LINKED_LIST_CLASS_NAME::MoveFrom(DOUBLY_LINKED_LIST_CLASS_NAME* fromList)
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{
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if (fromList && fromList->fFirst) {
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if (fFirst) {
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sGetLink(fLast)->next = fromList->fFirst;
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sGetLink(fromList->fFirst)->previous = fLast;
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fLast = fromList->fLast;
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} else {
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fFirst = fromList->fFirst;
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fLast = fromList->fLast;
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}
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fromList->fFirst = NULL;
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fromList->fLast = NULL;
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}
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}
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// RemoveAll
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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void
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DOUBLY_LINKED_LIST_CLASS_NAME::RemoveAll()
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{
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fFirst = NULL;
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fLast = NULL;
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}
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// RemoveHead
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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Element*
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DOUBLY_LINKED_LIST_CLASS_NAME::RemoveHead()
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{
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Element* element = Head();
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Remove(element);
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return element;
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}
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// RemoveTail
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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Element*
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DOUBLY_LINKED_LIST_CLASS_NAME::RemoveTail()
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{
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Element* element = Tail();
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Remove(element);
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return element;
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}
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// GetPrevious
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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Element*
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DOUBLY_LINKED_LIST_CLASS_NAME::GetPrevious(Element* element) const
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{
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Element* result = NULL;
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if (element)
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result = sGetLink(element)->previous;
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return result;
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}
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// GetNext
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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Element*
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DOUBLY_LINKED_LIST_CLASS_NAME::GetNext(Element* element) const
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{
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Element* result = NULL;
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if (element)
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result = sGetLink(element)->next;
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return result;
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}
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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bool
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DOUBLY_LINKED_LIST_CLASS_NAME::Contains(Element* _element) const
|
|
{
|
|
for (Element* element = First(); element; element = GetNext(element)) {
|
|
if (element == _element)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
// Count
|
|
DOUBLY_LINKED_LIST_TEMPLATE_LIST
|
|
int32
|
|
DOUBLY_LINKED_LIST_CLASS_NAME::Count() const
|
|
{
|
|
int32 count = 0;
|
|
for (Element* element = First(); element; element = GetNext(element))
|
|
count++;
|
|
return count;
|
|
}
|
|
|
|
|
|
DOUBLY_LINKED_LIST_TEMPLATE_LIST
|
|
template<typename Less>
|
|
void
|
|
DOUBLY_LINKED_LIST_CLASS_NAME::Sort(const Less& less)
|
|
{
|
|
// selection sort
|
|
Element* tail = Head();
|
|
while (tail != NULL) {
|
|
Element* leastElement = tail;
|
|
Element* element = tail;
|
|
while ((element = GetNext(element)) != NULL) {
|
|
if (less(element, leastElement))
|
|
leastElement = element;
|
|
}
|
|
|
|
if (leastElement != tail) {
|
|
Remove(leastElement);
|
|
InsertBefore(tail, leastElement);
|
|
} else
|
|
tail = GetNext(tail);
|
|
}
|
|
}
|
|
|
|
|
|
// sGetLink
|
|
DOUBLY_LINKED_LIST_TEMPLATE_LIST
|
|
GetLink DOUBLY_LINKED_LIST_CLASS_NAME::sGetLink;
|
|
|
|
#endif /* __cplusplus */
|
|
|
|
#endif // _KERNEL_UTIL_DOUBLY_LINKED_LIST_H
|