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;
 };
 

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);
 

test/test.c

@@ -1,20 +1,19 @@
 #include "../include/LLog.h"
-#include <stdio.h>
 #include <unistd.h>
 
 int main(void) {
     Logger logger = {0};
-    lLog(logger, lINFO, to_lLogString("Hello, INFO!"));
-    lLog(logger, lWARNING, to_lLogString("Hello, WARNING!"));
-    lLog(logger, lERROR, to_lLogString("Hello, ERROR!"));
-    lLog(logger, lDEBUG, to_lLogString("Hello, DEBUG!"));
+    lLog(logger, lINFO, lLogString_new("Hello, INFO!"));
+    lLog(logger, lWARNING, lLogString_new("Hello, WARNING!"));
+    lLog(logger, lERROR, lLogString_new("Hello, ERROR!"));
+    lLog(logger, lDEBUG, lLogString_new("Hello, DEBUG!"));
 
     int timer = create_timer(&logger);
     lTimespan* time_object = &logger.timers.items[timer].time;
     start_timer(&logger, timer);
     
-    sleep(5);
+    sleep(2);
     
     stop_timer(&logger, timer);
-    printf("\n%f seconds.\n", difftime(time_object->end, time_object->start));
+    lLog(logger, lINFO, lLogString_new("%f seconds.", difftime(time_object->end, time_object->start)));
 }