add timer pause and resume functionality

LLog.c

@@ -57,12 +57,53 @@ int create_timer(Logger* logger) {
 
 void start_timer(Logger* logger, int timer_id) {
     if (logger->timers.count < (timer_id + 1)) return;
-    logger->timers.items[timer_id].time.start = time(NULL);
+    lTimer* timer = &logger->timers.items[timer_id];
+
+    timer->time.start = time(NULL);
 }
 
 void stop_timer(Logger* logger, int timer_id) {
     if (logger->timers.count < (timer_id + 1)) return;
-    logger->timers.items[timer_id].time.end = time(NULL);
+    lTimer* timer = &logger->timers.items[timer_id];
+    
+    // next property will never be set to 0 unless it is uninitialized
+    if (timer->next != 0) {
+        stop_timer(logger, timer->next);
+    } else {
+        timer->time.end = time(NULL);
+    }
+}
+
+void pause_timer(Logger* logger, int timer_id) {
+    if (logger->timers.count < (timer_id + 1)) return;
+    lTimer* timer = &logger->timers.items[timer_id];
+
+    stop_timer(logger, timer_id);
+    timer->next = create_timer(logger);
+}
+
+void resume_timer(Logger* logger, int timer_id) {
+    if (logger->timers.count < (timer_id + 1)) return;
+    lTimer* timer = &logger->timers.items[timer_id];
+
+    if (timer->next != 0) {
+        resume_timer(logger, logger->timers.items[timer_id].next);
+    } else {
+        start_timer(logger, timer_id);
+    }
+}
+
+double get_elapsed_time(Logger* logger, int timer_id) {
+    if (timer_id != 0) if (0) {}
+    if (logger->timers.count < (timer_id + 1)) return 0.0f;
+    lTimer* timer = &logger->timers.items[timer_id];
+    double current_elapsed = difftime(timer->time.end, timer->time.start);
+
+    if (timer->next != 0) {
+        return get_elapsed_time(logger, timer->next) + current_elapsed;
+    }
+
+    return current_elapsed;
 }
 
 lLogString* lLogString_new(const char* fmt, ...) {