CPP Standards (#726)

* Bustub to BusTub - Naming consistency

* Changing type of filename from std::string to std::filesystem::path

* Fixing Format Error

* Small Fix

* fix Format error

Author: prashanthduvvada

src/common/bustub_instance.cpp

@@ -45,7 +45,7 @@ auto BusTubInstance::MakeExecutorContext(Transaction *txn, bool is_modify) -> st
                                            lock_manager_.get(), is_modify);
 }
 
-BusTubInstance::BusTubInstance(const std::string &db_file_name, size_t bpm_size) {
+BusTubInstance::BusTubInstance(const std::filesystem::path &db_file_name, size_t bpm_size) {
   enable_logging = false;
 
   // Storage related.

src/include/common/bustub_instance.h

@@ -12,6 +12,7 @@
 
 #pragma once
 
+#include <filesystem>
 #include <iostream>
 #include <memory>
 #include <optional>
@@ -241,7 +242,7 @@ class BusTubInstance {
   auto MakeExecutorContext(Transaction *txn, bool is_modify) -> std::unique_ptr<ExecutorContext>;
 
  public:
-  explicit BusTubInstance(const std::string &db_file_name, size_t bpm_size = 128);
+  explicit BusTubInstance(const std::filesystem::path &db_file_name, size_t bpm_size = 128);
 
   explicit BusTubInstance(size_t bpm_size = 128);
 

src/include/storage/disk/disk_manager.h

@@ -13,6 +13,7 @@
 #pragma once
 
 #include <atomic>
+#include <filesystem>
 #include <fstream>
 #include <future>  // NOLINT
 #include <mutex>   // NOLINT
@@ -32,7 +33,7 @@ class DiskManager {
    * Creates a new disk manager that writes to the specified database file.
    * @param db_file the file name of the database file to write to
    */
-  explicit DiskManager(const std::string &db_file);
+  explicit DiskManager(const std::filesystem::path &db_file);
 
   /** FOR TEST / LEADERBOARD ONLY, used by DiskManagerMemory */
   DiskManager() = default;
@@ -96,10 +97,10 @@ class DiskManager {
   auto GetFileSize(const std::string &file_name) -> int;
   // stream to write log file
   std::fstream log_io_;
-  std::string log_name_;
+  std::filesystem::path log_name_;
   // stream to write db file
   std::fstream db_io_;
-  std::string file_name_;
+  std::filesystem::path file_name_;
   int num_flushes_{0};
   int num_writes_{0};
   bool flush_log_{false};

src/include/storage/index/b_plus_tree.h

@@ -12,6 +12,7 @@
 
 #include <algorithm>
 #include <deque>
+#include <filesystem>
 #include <iostream>
 #include <optional>
 #include <queue>
@@ -95,7 +96,7 @@ class BPlusTree {
   void Print(BufferPoolManager *bpm);
 
   // Draw the B+ tree
-  void Draw(BufferPoolManager *bpm, const std::string &outf);
+  void Draw(BufferPoolManager *bpm, const std::filesystem::path &outf);
 
   /**
    * @brief draw a B+ tree, below is a printed
@@ -111,10 +112,10 @@ class BPlusTree {
   auto DrawBPlusTree() -> std::string;
 
   // read data from file and insert one by one
-  void InsertFromFile(const std::string &file_name, Transaction *txn = nullptr);
+  void InsertFromFile(const std::filesystem::path &file_name, Transaction *txn = nullptr);
 
   // read data from file and remove one by one
-  void RemoveFromFile(const std::string &file_name, Transaction *txn = nullptr);
+  void RemoveFromFile(const std::filesystem::path &file_name, Transaction *txn = nullptr);
 
   /**
    * @brief Read batch operations from input file, below is a sample file format
@@ -125,7 +126,7 @@ class BPlusTree {
    *                 (3)                (7)
    *            (1,2)    (3,4)    (5,6)    (7,10,30) //  The output tree example
    */
-  void BatchOpsFromFile(const std::string &file_name, Transaction *txn = nullptr);
+  void BatchOpsFromFile(const std::filesystem::path &file_name, Transaction *txn = nullptr);
 
  private:
   /* Debug Routines for FREE!! */

src/storage/disk/disk_manager.cpp

@@ -30,13 +30,8 @@ static char *buffer_used;
  * Constructor: open/create a single database file & log file
  * @input db_file: database file name
  */
-DiskManager::DiskManager(const std::string &db_file) : file_name_(db_file) {
-  std::string::size_type n = file_name_.rfind('.');
-  if (n == std::string::npos) {
-    LOG_DEBUG("wrong file format");
-    return;
-  }
-  log_name_ = file_name_.substr(0, n) + ".log";
+DiskManager::DiskManager(const std::filesystem::path &db_file) : file_name_(db_file) {
+  log_name_ = file_name_.filename().stem().string() + ".log";
 
   log_io_.open(log_name_, std::ios::binary | std::ios::in | std::ios::app | std::ios::out);
   // directory or file does not exist

src/storage/index/b_plus_tree.cpp

@@ -121,7 +121,7 @@ auto BPLUSTREE_TYPE::GetRootPageId() -> page_id_t { return 0; }
  * Read data from file and insert one by one
  */
 INDEX_TEMPLATE_ARGUMENTS
-void BPLUSTREE_TYPE::InsertFromFile(const std::string &file_name, Transaction *txn) {
+void BPLUSTREE_TYPE::InsertFromFile(const std::filesystem::path &file_name, Transaction *txn) {
   int64_t key;
   std::ifstream input(file_name);
   while (input >> key) {
@@ -136,7 +136,7 @@ void BPLUSTREE_TYPE::InsertFromFile(const std::string &file_name, Transaction *t
  * Read data from file and remove one by one
  */
 INDEX_TEMPLATE_ARGUMENTS
-void BPLUSTREE_TYPE::RemoveFromFile(const std::string &file_name, Transaction *txn) {
+void BPLUSTREE_TYPE::RemoveFromFile(const std::filesystem::path &file_name, Transaction *txn) {
   int64_t key;
   std::ifstream input(file_name);
   while (input >> key) {
@@ -151,7 +151,7 @@ void BPLUSTREE_TYPE::RemoveFromFile(const std::string &file_name, Transaction *t
  * Read data from file and insert/remove one by one
  */
 INDEX_TEMPLATE_ARGUMENTS
-void BPLUSTREE_TYPE::BatchOpsFromFile(const std::string &file_name, Transaction *txn) {
+void BPLUSTREE_TYPE::BatchOpsFromFile(const std::filesystem::path &file_name, Transaction *txn) {
   int64_t key;
   char instruction;
   std::ifstream input(file_name);
@@ -222,7 +222,7 @@ void BPLUSTREE_TYPE::PrintTree(page_id_t page_id, const BPlusTreePage *page) {
  * This method is used for debug only, You don't need to modify
  */
 INDEX_TEMPLATE_ARGUMENTS
-void BPLUSTREE_TYPE::Draw(BufferPoolManager *bpm, const std::string &outf) {
+void BPLUSTREE_TYPE::Draw(BufferPoolManager *bpm, const std::filesystem::path &outf) {
   if (IsEmpty()) {
     LOG_WARN("Drawing an empty tree");
     return;

test/buffer/buffer_pool_manager_test.cpp

@@ -24,7 +24,7 @@ namespace bustub {
 // NOLINTNEXTLINE
 // Check whether pages containing terminal characters can be recovered
 TEST(BufferPoolManagerTest, DISABLED_BinaryDataTest) {
-  const std::string db_name = "test.bustub";
+  const std::filesystem::path db_name("test.bustub");
   const size_t buffer_pool_size = 10;
   const size_t k = 5;
 
@@ -98,7 +98,7 @@ TEST(BufferPoolManagerTest, DISABLED_BinaryDataTest) {
 
 // NOLINTNEXTLINE
 TEST(BufferPoolManagerTest, DISABLED_SampleTest) {
-  const std::string db_name = "test.bustub";
+  const std::filesystem::path db_name("test.bustub");
   const size_t buffer_pool_size = 10;
   const size_t k = 5;
 

test/container/disk/hash/hash_table_page_test.cpp

@@ -24,7 +24,8 @@
 
 // // NOLINTNEXTLINE
 // TEST(HashTablePageTest, DISABLED_DirectoryPageSampleTest) {
-//   auto *disk_manager = new DiskManager("test.bustub");
+//   std::filesystem::path fname("test.bustub");
+//   auto *disk_manager = new DiskManager(fname);
 //   auto *bpm = new BufferPoolManager(5, disk_manager);
 
 //   // get a directory page from the BufferPoolManager
@@ -57,7 +58,8 @@
 
 // // NOLINTNEXTLINE
 // TEST(HashTablePageTest, DISABLED_BucketPageSampleTest) {
-//   auto *disk_manager = new DiskManager("test.bustub");
+//   std::filesystem::path fname("test.bustub");
+//   auto *disk_manager = new DiskManager(fname);
 //   auto *bpm = new BufferPoolManager(5, disk_manager);
 
 //   // get a bucket page from the BufferPoolManager

test/container/disk/hash/hash_table_test.cpp

@@ -25,7 +25,8 @@
 
 // // NOLINTNEXTLINE
 // TEST(HashTableTest, DISABLED_SampleTest) {
-//   auto *disk_manager = new DiskManager("test.bustub");
+//   std::filesystem::path fname("test.bustub");
+//   auto *disk_manager = new DiskManager(fname);
 //   auto *bpm = new BufferPoolManager(50, disk_manager);
 //   DiskExtendibleHashTable<int, int, IntComparator> ht("blah", bpm, IntComparator(), HashFunction<int>());
 

test/storage/disk_manager_test.cpp

@@ -37,7 +37,7 @@ class DiskManagerTest : public ::testing::Test {
 TEST_F(DiskManagerTest, ReadWritePageTest) {
   char buf[BUSTUB_PAGE_SIZE] = {0};
   char data[BUSTUB_PAGE_SIZE] = {0};
-  std::string db_file("test.bustub");
+  std::filesystem::path db_file("test.bustub");
   auto dm = DiskManager(db_file);
   std::strncpy(data, "A test string.", sizeof(data));
 
@@ -59,7 +59,7 @@ TEST_F(DiskManagerTest, ReadWritePageTest) {
 TEST_F(DiskManagerTest, ReadWriteLogTest) {
   char buf[16] = {0};
   char data[16] = {0};
-  std::string db_file("test.bustub");
+  std::filesystem::path db_file("test.bustub");
   auto dm = DiskManager(db_file);
   std::strncpy(data, "A test string.", sizeof(data));