* Added DoublyLinkedListMemberGetLink class which directly accesses the
link member in the element class. Usually more comfortable for structs. * Added Add() method as synonym for Insert(). * Made fGetLink member static to save memory in objects using it. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11188 a95241bf-73f2-0310-859d-f6bbb57e9c96
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@ -189,6 +189,25 @@ public:
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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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// 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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@ -294,13 +313,12 @@ public:
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public:
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DoublyLinkedList() : fFirst(NULL), fLast(NULL) {}
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DoublyLinkedList(const GetLink &getLink)
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: fFirst(NULL), fLast(NULL), fGetLink(getLink) {}
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~DoublyLinkedList() {}
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inline bool IsEmpty() const { return (fFirst == NULL); }
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inline void Insert(Element *element, bool back = true);
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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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@ -328,7 +346,8 @@ public:
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private:
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Element *fFirst;
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Element *fLast;
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GetLink fGetLink;
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static GetLink sGetLink;
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};
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@ -342,21 +361,21 @@ DOUBLY_LINKED_LIST_CLASS_NAME::Insert(Element *element, bool back)
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if (element) {
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if (back) {
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// append
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Link *elLink = fGetLink(element);
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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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fGetLink(fLast)->next = element;
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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 = fGetLink(element);
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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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fGetLink(fFirst)->previous = element;
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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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@ -364,19 +383,27 @@ DOUBLY_LINKED_LIST_CLASS_NAME::Insert(Element *element, bool back)
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}
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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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Link *elLink = fGetLink(element);
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Link *elLink = sGetLink(element);
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if (elLink->previous)
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fGetLink(elLink->previous)->next = elLink->next;
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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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fGetLink(elLink->next)->previous = elLink->previous;
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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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elLink->previous = NULL;
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@ -390,30 +417,30 @@ 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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Link *aLink = fGetLink(a);
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Link *bLink = fGetLink(b);
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Link *aLink = sGetLink(a);
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Link *bLink = sGetLink(b);
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Element *aPrev = aLink->previous;
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Element *bPrev = bLink->previous;
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Element *aNext = aLink->next;
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Element *bNext = bLink->next;
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// place a
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if (bPrev)
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fGetLink(bPrev)->next = a;
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sGetLink(bPrev)->next = a;
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else
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fFirst = a;
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if (bNext)
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fGetLink(bNext)->previous = a;
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sGetLink(bNext)->previous = a;
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else
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fLast = a;
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aLink->previous = bPrev;
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aLink->next = bNext;
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// place b
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if (aPrev)
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fGetLink(aPrev)->next = b;
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sGetLink(aPrev)->next = b;
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else
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fFirst = b;
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if (aNext)
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fGetLink(aNext)->previous = b;
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sGetLink(aNext)->previous = b;
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else
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fLast = b;
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bLink->previous = aPrev;
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@ -428,8 +455,8 @@ 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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fGetLink(fLast)->next = fromList->fFirst;
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fGetLink(fFirst)->previous = fLast;
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sGetLink(fLast)->next = fromList->fFirst;
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sGetLink(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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@ -447,7 +474,7 @@ DOUBLY_LINKED_LIST_CLASS_NAME::RemoveAll()
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{
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Element *element = fFirst;
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while (element) {
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Link *elLink = fGetLink(element);
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Link *elLink = sGetLink(element);
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element = elLink->next;
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elLink->previous = NULL;
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elLink->next = NULL;
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@ -463,7 +490,7 @@ 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 = fGetLink(element)->previous;
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result = sGetLink(element)->previous;
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return result;
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}
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@ -474,7 +501,7 @@ 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 = fGetLink(element)->next;
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result = sGetLink(element)->next;
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return result;
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}
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@ -489,6 +516,10 @@ DOUBLY_LINKED_LIST_CLASS_NAME::Size() const
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return count;
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}
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// sGetLink
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DOUBLY_LINKED_LIST_TEMPLATE_LIST
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GetLink DOUBLY_LINKED_LIST_CLASS_NAME::sGetLink;
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#endif /* __cplusplus */
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#endif // _KERNEL_UTIL_DOUBLY_LINKED_LIST_H
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