Федорец Илья - Лабораторная работа №2 (#415)

* initial

* fixes

* fixes

* fixes

* fixes

* fixes

Author: ilya-fedorets

modules/fedorets_i_leftheap/CMakeLists.txt

@@ -0,0 +1,12 @@
+# Declare variables for binaries' names
+get_filename_component(DIR_NAME ${CMAKE_CURRENT_LIST_DIR} NAME)
+set(MODULE      "${DIR_NAME}")
+set(LIBRARY     "lib_${MODULE}")
+set(TESTS       "test_${MODULE}")
+
+# Include directory with public headers
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+
+# Add all submodules
+add_subdirectory(src)
+add_subdirectory(test)

modules/fedorets_i_leftheap/include/leftheap.h

@@ -0,0 +1,58 @@
+// Copyright 2024 Fedorets Ilya
+
+#ifndef MODULES_FEDORETS_I_LEFTHEAP_INCLUDE_LEFTHEAP_H_
+#define MODULES_FEDORETS_I_LEFTHEAP_INCLUDE_LEFTHEAP_H_
+
+#include <algorithm>
+#include <iostream>
+
+class LeftistHeap {
+ private:
+  struct Node {
+    int data;
+    int rank;
+    Node* left;
+    Node* right;
+
+    explicit Node(int val)
+        : data(val), rank(1), left(nullptr), right(nullptr) {}
+
+    explicit Node(const Node* other)
+        : data(other->data), rank(other->rank), left(nullptr), right(nullptr) {
+      if (other->left) left = new Node(other->left);
+      if (other->right) right = new Node(other->right);
+    }
+  };
+
+  Node* root;
+
+  Node* deepCopy(const Node* node);
+  Node* merge(Node* h1, Node* h2);
+  void deleteNode(Node* node);
+
+ public:
+  LeftistHeap() : root(nullptr) {}
+
+  LeftistHeap(const LeftistHeap& other) : root(deepCopy(other.root)) {}
+
+  LeftistHeap(LeftistHeap&& other) noexcept : root(other.root) {
+    other.root = nullptr;
+  }
+
+  LeftistHeap& operator=(const LeftistHeap& other);
+  LeftistHeap& operator=(LeftistHeap&& other) noexcept;
+
+  ~LeftistHeap() { deleteNode(root); }
+
+  void insert(int val);
+  void merge(LeftistHeap& other);
+  int deleteMin();
+  bool isEmpty() const;
+  int findMin() const;
+  int size() const;
+
+ private:
+  int countNodes(Node* node) const;
+};
+
+#endif  // MODULES_FEDORETS_I_LEFTHEAP_INCLUDE_LEFTHEAP_H_

modules/fedorets_i_leftheap/src/CMakeLists.txt

@@ -0,0 +1,18 @@
+set(target ${LIBRARY})
+
+file(GLOB srcs "*.cpp")
+file(GLOB hdrs "../include/*.h")
+set_source_files_properties(${srcs} ${hdrs} PROPERTIES
+    LABELS "${MODULE};Library")
+
+add_library(${target} STATIC ${srcs} ${hdrs})
+set_target_properties(${target} PROPERTIES
+    OUTPUT_NAME ${MODULE}
+    LABELS "${MODULE};Library")
+
+if (UNIX)
+  target_link_libraries(${target} ${CMAKE_THREAD_LIBS_INIT})
+endif (UNIX)
+  target_link_libraries(${target} ${LIBRARY_DEPS})
+
+set(LIBRARY_DEPS "${LIBRARY_DEPS};${target}" PARENT_SCOPE)

modules/fedorets_i_leftheap/src/leftheap.cpp

@@ -0,0 +1,91 @@
+// Copyright 2024 Fedorets Ilya
+
+#include "include/leftheap.h"
+
+LeftistHeap::Node* LeftistHeap::deepCopy(const Node* node) {
+  return node ? new Node(node) : nullptr;
+}
+
+LeftistHeap::Node* LeftistHeap::merge(Node* h1, Node* h2) {
+  if (h1 == nullptr) return h2;
+  if (h2 == nullptr) return h1;
+
+  if (h1->data > h2->data) {
+    std::swap(h1, h2);
+  }
+
+  h1->right = merge(h1->right, h2);
+
+  if (h1->left == nullptr ||
+      (h1->right != nullptr && h1->right->rank > h1->left->rank)) {
+    std::swap(h1->left, h1->right);
+  }
+
+  h1->rank = (h1->right ? h1->right->rank : 0) + 1;
+
+  return h1;
+}
+
+void LeftistHeap::deleteNode(Node* node) {
+  if (node == nullptr) return;
+  deleteNode(node->left);
+  deleteNode(node->right);
+  delete node;
+}
+
+LeftistHeap& LeftistHeap::operator=(const LeftistHeap& other) {
+  if (this != &other) {
+    deleteNode(root);
+
+    root = deepCopy(other.root);
+  }
+  return *this;
+}
+
+LeftistHeap& LeftistHeap::operator=(LeftistHeap&& other) noexcept {
+  if (this != &other) {
+    deleteNode(root);
+
+    root = other.root;
+    other.root = nullptr;
+  }
+  return *this;
+}
+
+void LeftistHeap::insert(int val) {
+  Node* newNode = new Node(val);
+  root = merge(root, newNode);
+}
+
+void LeftistHeap::merge(LeftistHeap& other) {
+  root = merge(root, other.root);
+  other.root = nullptr;
+}
+
+int LeftistHeap::deleteMin() {
+  if (root == nullptr) {
+    throw std::runtime_error("Heap is empty");
+  }
+
+  int minVal = root->data;
+  Node* oldRoot = root;
+  root = merge(root->left, root->right);
+  delete oldRoot;
+
+  return minVal;
+}
+
+bool LeftistHeap::isEmpty() const { return root == nullptr; }
+
+int LeftistHeap::findMin() const {
+  if (root == nullptr) {
+    throw std::runtime_error("Heap is empty");
+  }
+  return root->data;
+}
+
+int LeftistHeap::size() const { return countNodes(root); }
+int LeftistHeap::countNodes(Node* node) const {
+  if (node == nullptr) return 0;
+  return 1 + countNodes(node->left) + countNodes(node->right);
+}

modules/fedorets_i_leftheap/test/CMakeLists.txt

@@ -0,0 +1,27 @@
+set(target ${TESTS})
+
+file(GLOB srcs "*.cpp")
+set_source_files_properties(${srcs} PROPERTIES
+    LABELS "${MODULE};Test")
+
+add_executable(${target} ${srcs} ${hdrs})
+set_target_properties(${target} PROPERTIES
+    LABELS "${MODULE};Test")
+
+if (UNIX)
+  target_link_libraries(${target} gtest ${CMAKE_THREAD_LIBS_INIT} pthread)
+endif (UNIX)
+target_link_libraries(${target} gtest ${LIBRARY})
+
+# VS2012 doesn't support correctly the tuples yet,
+# see http://code.google.com/p/googletest/issues/detail?id=412
+if(MSVC)
+    target_compile_definitions(${target} PUBLIC _VARIADIC_MAX=10)
+endif()
+
+add_test(
+    NAME ${MODULE}_gtest
+    COMMAND ${target}
+)
+set_tests_properties (${MODULE}_gtest PROPERTIES
+    LABELS "${MODULE}")