From 7b38c7fa2a76d912ca45576c06b9f900d77b616c Mon Sep 17 00:00:00 2001
From: Stoycho Kyosev <stoycho.kk@gmail.com>
Date: Wed, 19 Oct 2022 13:15:50 +0300
Subject: add Sem03

---
 Seminar03/Linked-Queue.hpp | 162 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 162 insertions(+)
 create mode 100644 Seminar03/Linked-Queue.hpp

(limited to 'Seminar03/Linked-Queue.hpp')

diff --git a/Seminar03/Linked-Queue.hpp b/Seminar03/Linked-Queue.hpp
new file mode 100644
index 0000000..d11dc11
--- /dev/null
+++ b/Seminar03/Linked-Queue.hpp
@@ -0,0 +1,162 @@
+#ifndef LINKED_QUEUE_IMPL
+#define LINKED_QUEUE_IMPL
+
+#include<cstddef>
+
+template<class T>
+class LinkedQueue {
+private:
+    struct LinkedNode {
+        T data;
+        LinkedNode* next;
+
+        LinkedNode(const T& argData, LinkedNode* argNext = nullptr) : data {argData}, next{argNext} {} 
+    };
+
+    LinkedNode* head;                   // Последния добавен елемент в опашката
+    LinkedNode* tail;                   // Първия добавен елемент в опашката
+    size_t queueSize;
+
+    void copy(const LinkedQueue<T>&);
+    void free();
+
+public:
+    LinkedQueue();
+    
+    LinkedQueue(const LinkedQueue<T>&);
+    LinkedQueue& operator=(const LinkedQueue<T>&);
+
+    LinkedQueue(LinkedQueue<T>&&) noexcept;
+    LinkedQueue& operator=(LinkedQueue<T>&&) noexcept;
+
+    void push(const T&);
+    void pop();
+    const T& front() const;
+
+    bool empty() const;
+
+    size_t size() const;
+
+    ~LinkedQueue();
+};
+
+template<class T>
+LinkedQueue<T>::LinkedQueue() : head {nullptr}, tail{nullptr}, queueSize{0} {}
+
+template<class T>
+LinkedQueue<T>::LinkedQueue(const LinkedQueue<T>& other) {
+    copy(other);
+}
+
+template<class T>
+LinkedQueue<T>& LinkedQueue<T>::operator=(const LinkedQueue<T>& other) {
+    if(this != &other){
+        free();
+        copy(other);
+    }
+
+    return *this;
+}
+
+template<class T>
+LinkedQueue<T>::LinkedQueue(LinkedQueue<T>&& other) noexcept {
+    head = other.head;
+    tail = other.tail;
+    size = other.size;
+
+    other.head = nullptr;
+    other.tail = nullptr;
+}
+
+template<class T>
+LinkedQueue<T>& LinkedQueue<T>::operator=(LinkedQueue<T>&& other) noexcept {
+    if(this != &other) {
+        head = other.head;
+        tail = other.tail;
+        size = other.size;
+
+        other.head = nullptr;
+        other.tail = nullptr;
+    }
+    return *this;
+}
+
+template<class T>
+void LinkedQueue<T>::copy(const LinkedQueue<T>& other) {
+    LinkedNode* iter = other.head;
+
+    while(iter) {
+        push(iter->data);
+        iter = iter->next;
+    }
+}
+
+template<class T>
+void LinkedQueue<T>::free() {
+    LinkedNode* iter = head;
+    while(iter) {
+        LinkedNode* removeMe = iter;
+        iter = iter->next;
+        delete removeMe;
+    }
+}
+
+template<class T>
+bool LinkedQueue<T>::empty() const {
+    return head == nullptr;
+}
+
+template<class T>
+size_t LinkedQueue<T>::size() const {
+    return queueSize;
+}
+
+template<class T>
+void LinkedQueue<T>::push(const T& elem) {
+    LinkedNode* toPush = new LinkedNode(elem);
+    if(empty()) {
+        tail = toPush;
+        head = toPush;
+    }
+    else {
+        tail->next = toPush;
+        tail = toPush;
+    }
+
+    ++queueSize;
+}
+
+template<class T>
+void LinkedQueue<T>::pop() {
+    if(empty()) {
+        throw "Empty queue";
+    }
+    else if(head == tail) {
+        delete head;
+        head = nullptr;
+        tail = nullptr;
+    }
+    else {
+        LinkedNode* deleteMe = head;
+        head = head->next;
+        delete deleteMe;
+    }
+
+    --queueSize;
+}
+
+template<class T>
+const T& LinkedQueue<T>::front() const {
+    if(empty()){
+        throw "Empty queue";
+    }
+
+    return head->data;
+}
+
+template<class T>
+LinkedQueue<T>::~LinkedQueue() {
+    free();
+}
+
+#endif
\ No newline at end of file
-- 
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