made the prepared statement re-usable and renamed .h to sqlite_sink

include/spdlog/sinks/sqlite_sink.h

@@ -8,28 +8,33 @@ namespace spdlog
 {
 	namespace sinks
 	{
-		class database_logger_sink :
+		class sqlite_sink :
 			public sink
 		{
 		public:
 
-			explicit database_logger_sink(const std::string& databaseName)
+			explicit sqlite_sink(const std::string& databaseName)
 			{
 				if (sqlite3_open(databaseName.c_str(), &_database))
 					throw spdlog_ex("Error opening database");
+
+				if (sqlite3_prepare_v2(_database, "INSERT INTO Logs (TimeStamp,Level,Message,LoggerName,ThreadId) VALUES (?,?,?,?,?)", -1, &_query_stmt, nullptr) != SQLITE_OK)
+					throw spdlog_ex(sqlite3_errmsg(_database));
 			}
 
-			~database_logger_sink()
+			~sqlite_sink()
 			{
-				sqlite3_close(_database);
+				sqlite_sink::flush();
 			}
 
 			void flush() override
 			{
 				sqlite3_close(_database);
+
+				sqlite3_finalize(_query_stmt);
 			}
 
-			sqlite3_stmt * prepare_query(const details::log_msg& msg) const
+			void bind_to_statement(const details::log_msg& msg) const
 			{
 				auto time = std::chrono::system_clock::to_time_t(msg.time);
 
@@ -37,35 +42,31 @@ namespace spdlog
 
 				ctime_s(time_str, sizeof(time_str), &time);
 
-				sqlite3_stmt * query_stmt;
-
-				if (sqlite3_prepare_v2(_database, "INSERT INTO Logs (TimeStamp,Level,Message,LoggerName,ThreadId) VALUES (?,?,?,?,?)", -1, &query_stmt, nullptr) != SQLITE_OK)
+				if (sqlite3_bind_text(_query_stmt, 1, time_str, -1, SQLITE_STATIC) != SQLITE_OK ||
+					sqlite3_bind_text(_query_stmt, 2, to_str(msg.level), -1, SQLITE_STATIC) != SQLITE_OK ||
+					sqlite3_bind_text(_query_stmt, 3, msg.raw.c_str(), -1, nullptr) != SQLITE_OK ||
+					sqlite3_bind_text(_query_stmt, 4, msg.logger_name.c_str(), -1, SQLITE_STATIC) != SQLITE_OK ||
+					sqlite3_bind_int(_query_stmt, 5, msg.thread_id) != SQLITE_OK)
 					throw spdlog_ex(sqlite3_errmsg(_database));
-
-				if (sqlite3_bind_text(query_stmt, 1, time_str, -1, SQLITE_STATIC) != SQLITE_OK ||
-					sqlite3_bind_text(query_stmt, 2, to_str(msg.level), -1, SQLITE_STATIC) != SQLITE_OK ||
-					sqlite3_bind_text(query_stmt, 3, msg.raw.c_str(), -1, nullptr) != SQLITE_OK ||
-					sqlite3_bind_text(query_stmt, 4, "'''''''''''", -1, SQLITE_STATIC) != SQLITE_OK ||
-					sqlite3_bind_int(query_stmt, 5, msg.thread_id) != SQLITE_OK)
-					throw spdlog_ex(sqlite3_errmsg(_database));
-
-				return query_stmt;
 			}
 
 			void log(const details::log_msg& msg) override
 			{
-				auto query_stmt = prepare_query(msg);
+				bind_to_statement(msg);
 
-				if (sqlite3_step(query_stmt) != SQLITE_DONE)
+				if (sqlite3_step(_query_stmt) != SQLITE_DONE)
 				{
 					throw spdlog_ex(sqlite3_errmsg(_database));
 				}
 
-				sqlite3_finalize(query_stmt);
+				sqlite3_reset(_query_stmt);
+				sqlite3_clear_bindings(_query_stmt);
 			}
 
 		private:
 			sqlite3 *_database;
+
+			sqlite3_stmt * _query_stmt;
 		};
 	}
 }