add timer pause and resume functionality

include/LLog.h

@@ -32,6 +32,7 @@ typedef struct {
 
 typedef struct {
     lTimespan time;
+    int next;
 } lTimer;
 
 typedef struct {
@@ -61,6 +62,9 @@ Logger* Logger_new(lLogString* logfolder, int history_enabled);
 int create_timer(Logger* logger);
 void start_timer(Logger* logger, int timer_id);
 void stop_timer(Logger* logger, int timer_id);
+void pause_timer(Logger* logger, int timer_id);
+void resume_timer(Logger* logger, int timer_id);
+double get_elapsed_time(Logger* logger, int timer_id);
 
 lLogString* lLogString_new(const char* fmt, ...);