add formatting to lLogString

include/LLog.h

@@ -2,6 +2,9 @@
 #define LLog_H
 
 #include "time.h"
+#include <stdarg.h>
+
+#define max_string_len 1024
 
 typedef struct {
     char *buf;
@@ -41,7 +44,7 @@ int create_timer(Logger* logger);
 void start_timer(Logger* logger, int timer_id);
 void stop_timer(Logger* logger, int timer_id);
 
-lLogString to_lLogString(const char* string);
+lLogString lLogString_new(const char* fmt, ...);
 
 void lLog(Logger logger, enum lLogLevel LOG_LEVEL, lLogString MESSAGE);