add formatting to lLogString

LLog.c

@@ -3,6 +3,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include "time.h"
+#include <stdarg.h>
 
 int timer_array_append(timer_array* array, lTimer timer) {
     if (array->count >= array->capacity) {
@@ -29,14 +30,23 @@ void stop_timer(Logger* logger, int timer_id) {
     logger->timers.items[timer_id].time.end = time(NULL);
 }
 
-lLogString to_lLogString(const char* string) {
+lLogString lLogString_new(const char* fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+
+    char temp_string[max_string_len];
+    vsnprintf(temp_string, max_string_len, fmt, args);
+    
+    va_end(args);
+    
     lLogString str;
-    str.buf = (char *)string;
-    if (string == NULL) {
-        str.len = 0;
-    } else {
-        str.len = strlen(string);
+    str.len = strlen(temp_string);
+
+    str.buf = malloc(str.len + 1);
+    if (str.buf != NULL) {
+        strcpy(str.buf, temp_string);
     }
+
     return str;
 };