128 lines
2.6 KiB
C++
128 lines
2.6 KiB
C++
#include <iostream>
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#include <string>
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#include "sqlite3.h"
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const char *DB_FILE_NAME = "example.sqlite";
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sqlite3 *db = nullptr;
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sqlite3_stmt *ins_log_stmt = nullptr;
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int create_tables() {
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char *err_msg = nullptr;
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int rc = sqlite3_exec(
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db,
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"CREATE TABLE IF NOT EXISTS logs("\
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"id INTEGER PRIMARY KEY AUTOINCREMENT,"\
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"data TEXT,"\
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"datetime TIMESTAMP DEFAULT CURRENT_TIMESTAMP"\
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")",
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NULL,
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0,
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&err_msg
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);
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if (rc) {
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std::cout << "Error: " << err_msg << std::endl;
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sqlite3_free(err_msg);
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}
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return rc;
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}
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int prepare_statements() {
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std::string sql = "INSERT INTO logs (data) VALUES (?);";
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return sqlite3_prepare_v2(
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db,
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sql.c_str(),
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sql.length(),
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&ins_log_stmt,
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nullptr
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);
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}
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static int logs_callback(void *data, int argc, char **argv, char **azColName){
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if (argc == 3) {
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std::cout << argv[0] << ". (" << argv[2] << ") " << argv[1] << std::endl;
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} else {
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std::cout << "Error: Expected 3 columns, got " << argc << std::endl;
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}
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return 0;
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}
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int list_logs() {
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char *err_msg = nullptr;
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std::string sql = "SELECT id, data, datetime FROM logs";
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int rc = sqlite3_exec(db, sql.c_str(), logs_callback, NULL, &err_msg);
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if (rc != SQLITE_OK) {
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std::cout << "Error: " << err_msg << std::endl;
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sqlite3_free(err_msg);
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}
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return rc;
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}
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int insert_log(std::string data) {
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int rc = sqlite3_bind_text(
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ins_log_stmt,
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1,
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data.c_str(),
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data.length(),
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SQLITE_STATIC
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);
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if (rc) {
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return rc;
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}
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rc = sqlite3_step(ins_log_stmt);
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if (rc != SQLITE_DONE) {
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return rc;
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}
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rc = sqlite3_reset(ins_log_stmt);
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if (rc) {
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return rc;
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}
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return rc;
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}
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int main() {
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int rc = sqlite3_open(DB_FILE_NAME, &db);
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if (rc) {
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std::cout << "Error code: " << rc << std::endl;
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return rc;
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}
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rc = create_tables();
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if (rc) {
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std::cout << "Error code: " << rc << std::endl;
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return rc;
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}
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rc = prepare_statements();
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if (rc) {
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std::cout << "Error code: " << rc << std::endl;
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return rc;
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}
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rc = list_logs();
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if (rc) {
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std::cout << "Error code: " << rc << std::endl;
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return rc;
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}
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rc = insert_log("wolf (test log)");
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if (rc) {
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std::cout << "Error code123: " << rc << std::endl;
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return rc;
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}
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rc = insert_log("lion (test log2)");
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if (rc) {
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std::cout << "Error code: " << rc << std::endl;
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return rc;
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}
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sqlite3_close(db);
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return 0;
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}
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