diff --git a/container/SinglyLinkedList.h b/container/SinglyLinkedList.h index 0a2e0531..eb6ae276 100644 --- a/container/SinglyLinkedList.h +++ b/container/SinglyLinkedList.h @@ -1,10 +1,13 @@ -#ifndef SINGLYLINKEDLIST_H_ -#define SINGLYLINKEDLIST_H_ +#ifndef FRAMEWORK_CONTAINER_SINGLYLINKEDLIST_H_ +#define FRAMEWORK_CONTAINER_SINGLYLINKEDLIST_H_ + +#include +#include -#include -#include /** - * \ingroup container + * @brief Linked list data structure, + * each entry has a pointer to the next entry (singly) + * @ingroup container */ template class LinkedElement { @@ -12,11 +15,8 @@ public: T *value; class Iterator { public: - LinkedElement *value; - Iterator() : - value(NULL) { - - } + LinkedElement *value = nullptr; + Iterator() {} Iterator(LinkedElement *element) : value(element) { @@ -45,12 +45,11 @@ public: } }; - LinkedElement(T* setElement, LinkedElement* setNext = NULL) : value(setElement), - next(setNext) { - } - virtual ~LinkedElement(){ + LinkedElement(T* setElement, LinkedElement* setNext = nullptr): + value(setElement), next(setNext) {} + + virtual ~LinkedElement(){} - } virtual LinkedElement* getNext() const { return next; } @@ -58,11 +57,16 @@ public: virtual void setNext(LinkedElement* next) { this->next = next; } + + virtual void setEnd() { + this->next = nullptr; + } + LinkedElement* begin() { return this; } LinkedElement* end() { - return NULL; + return nullptr; } private: LinkedElement *next; @@ -71,37 +75,80 @@ private: template class SinglyLinkedList { public: - SinglyLinkedList() : - start(NULL) { - } + using ElementIterator = typename LinkedElement::Iterator; + + SinglyLinkedList() {} + + SinglyLinkedList(ElementIterator start) : + start(start.value) {} - SinglyLinkedList(typename LinkedElement::Iterator start) : - start(start.value) { - } SinglyLinkedList(LinkedElement* startElement) : - start(startElement) { - } - typename LinkedElement::Iterator begin() const { - return LinkedElement::Iterator::Iterator(start); - } - typename LinkedElement::Iterator::Iterator end() const { - return LinkedElement::Iterator::Iterator(); + start(startElement) {} + + ElementIterator begin() const { + return ElementIterator::Iterator(start); } - uint32_t getSize() const { - uint32_t size = 0; + /** Returns iterator to nulltr */ + ElementIterator end() const { + return ElementIterator::Iterator(); + } + + /** + * Returns last element in singly linked list. + * @return + */ + ElementIterator back() const { + LinkedElement *element = start; + while (element->getNext() != nullptr) { + element = element->getNext(); + } + return ElementIterator::Iterator(element); + } + + size_t getSize() const { + size_t size = 0; LinkedElement *element = start; - while (element != NULL) { + while (element != nullptr) { size++; element = element->getNext(); } return size; } - void setStart(LinkedElement* setStart) { - start = setStart; + void setStart(LinkedElement* firstElement) { + start = firstElement; } + + void setNext(LinkedElement* currentElement, + LinkedElement* nextElement) { + currentElement->setNext(nextElement); + } + + void setLast(LinkedElement* lastElement) { + lastElement->setEnd(); + } + + void insertElement(LinkedElement* element, size_t position) { + LinkedElement *currentElement = start; + for(size_t count = 0; count < position; count++) { + if(currentElement == nullptr) { + return; + } + currentElement = currentElement->getNext(); + } + LinkedElement* elementAfterCurrent = currentElement->next; + currentElement->setNext(element); + if(elementAfterCurrent != nullptr) { + element->setNext(elementAfterCurrent); + } + } + + void insertBack(LinkedElement* lastElement) { + back().value->setNext(lastElement); + } + protected: - LinkedElement *start; + LinkedElement *start = nullptr; }; #endif /* SINGLYLINKEDLIST_H_ */