sqlite server project init

inc/litedb.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <string>
+#include <status.h>
+#include <sqlite3.h>
+
+class litedb
+{
+private:
+    std::string _db_path_name;
+    sqlite3 *db;
+    sqlite3_stmt *stmt;
+
+    litedb(const litedb &oth) = delete;
+
+    litedb &operator=(const litedb &oth) = delete;
+
+    const static std::string SQL_TEXT_FETCH_ALL_TABLE_NAME;
+
+public:
+    litedb(std::string &db_name);
+
+    Status litedb_open();
+
+    inline bool is_db_open() const
+    {
+        return this->db ? true : false;
+    }
+
+    ~litedb();
+};
+
+const std::string litedb::SQL_TEXT_FETCH_ALL_TABLE_NAME =
+    "SELECT name FROM sqlite_master WHERE type='table' AND name NOT LIKE 'sqlite_%';";
+

inc/status.h

@@ -0,0 +1,9 @@
+#pragma once
+
+enum class Status{
+    STATUS_OK = 0,
+    STATUS_ERR = -1,
+    STATUS_INNER_ERR =-2,
+    STATUS_INVALIED_PARAMS =-3,
+    STATUS_OOM =-4
+};

makefile

@@ -0,0 +1,26 @@
+CXX = g++
+
+CFLAGS = -Wall -I./inc 
+LDFLAGS = -lsqlite3
+
+SRCDIR = ./src
+BUILDDIR = ./build
+
+TARGET = run
+
+SRCS := $(wildcard $(SRCDIR)/*.cc)
+
+OBJS := $(patsubst $(SRCDIR)/%.cc,$(BUILDDIR)/%.o,$(wildcard $(SRCDIR)/*.cc))
+
+all: $(TARGET)
+
+$(TARGET): $(OBJS)
+		$(CXX) -o $@ $^ $(LDFLAGS)
+
+$(BUILDDIR)/%.o: $(SRCDIR)/%.cc
+		$(CXX) $(CFLAGS) -c -o $@ $<
+
+clean:
+		rm -f $(OBJS) $(TARGET)
+
+.PHONY: all clean

src/litedb.cc

@@ -0,0 +1,37 @@
+#include <litedb.h>
+
+litedb::litedb(std::string &db_name) : stmt(nullptr), db(nullptr)
+{
+    this->_db_path_name = std::move(db_name);
+}
+
+litedb::~litedb()
+{
+    if (this->stmt)
+        sqlite3_finalize(this->stmt);
+    
+    if (this->db)
+        sqlite3_close_v2(this->db);
+}
+
+Status litedb::litedb_open()
+{
+
+    if (this->_db_path_name.empty())
+    {
+        return Status::STATUS_INNER_ERR;
+    }
+
+    if (this->db)
+    {
+        return Status::STATUS_OK;
+    }
+
+    int ret = sqlite3_open_v2(this->_db_path_name.c_str(), &this->db, 0, nullptr);
+    if (ret != SQLITE_OK)
+    {
+        return Status::STATUS_INNER_ERR;
+    }
+
+    return Status::STATUS_OK;
+}

src/main.cc

@@ -0,0 +1,53 @@
+#include <sqlite3.h>
+#include <iostream>
+#include <vector>
+#include <string>
+
+using namespace std;
+
+const string DB_NAME = "./testDB";
+
+int main(int argc, char const *argv[])
+{
+    sqlite3 *db = nullptr;
+
+    int ret = sqlite3_open(DB_NAME.c_str(), &db);
+    if (ret != SQLITE_OK)
+    {
+        std::cout << "failed to open database\n";
+        return -1;
+    }
+
+    // creating a new table
+
+    string sql_create_table = "CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY, name TEXT, age INTEGER);";
+
+    sqlite3_stmt *stmt;
+    ret = sqlite3_prepare_v2(db, sql_create_table.c_str(), sql_create_table.size(), &stmt, nullptr);
+    if (ret != SQLITE_OK)
+    {
+        std::cout << "failed to complier sql statement\n";
+        sqlite3_close(db);
+        return -1;
+    }
+
+    ret = sqlite3_step(stmt);
+    if (ret != SQLITE_DONE)
+    {
+        cout << "faild to exec stmt\n";
+        sqlite3_finalize(stmt);
+        sqlite3_close(db);
+        return -1;
+    }
+    sqlite3_finalize(stmt);
+    
+    cout << "success creating table or already exist the table\n";
+
+    //插入数据
+    
+
+  
+    sqlite3_close(db);
+
+    return 0;
+}