2 files changed, 26 insertions, 0 deletions

diff --git a/src/libraries/LumbrJack.c b/src/libraries/LumbrJack.c
index e873d02..8d08622 100644
--- a/src/libraries/LumbrJack.c
+++ b/src/libraries/LumbrJack.c
@@ -86,3 +86,27 @@ char *getDateTime(struct tm **nowOut, char *dateOut, time_t *timeOut)
   strftime(date, DATE_TIME_LEN, "%d/%m/%Y %H:%M:%S\r", newTime);
   return (dateTime);
 }
+
+float timeDiff(struct timeval *now, struct timeval *then)
+{
+    if (0 == gettimeofday(now, 0))
+    {
+        struct timeval thisTime = { 0, 0 };
+        double  result = 0.0;
+
+        thisTime.tv_sec = now->tv_sec;
+        thisTime.tv_usec = now->tv_usec;
+        if (thisTime.tv_usec < then->tv_usec)
+        {
+            thisTime.tv_sec--;
+            thisTime.tv_usec += 1000000;
+        }
+        thisTime.tv_usec -= then->tv_usec;
+        thisTime.tv_sec -= then->tv_sec;
+        result = ((double) thisTime.tv_usec) / ((double) 1000000.0);
+        result += thisTime.tv_sec;
+        return result;
+    }
+    else
+        return 0.0;
+}
diff --git a/src/libraries/LumbrJack.h b/src/libraries/LumbrJack.h
index a096e7f..1912bef 100644
--- a/src/libraries/LumbrJack.h
+++ b/src/libraries/LumbrJack.h
@@ -33,5 +33,7 @@ typedef enum
 
 int loggingStartup(char *name, int logDom);
 char *getDateTime(struct tm **nowOut, char *dateOut, time_t *tiemOut);
+float timeDiff(struct timeval *now, struct timeval *then);
+
 
 #endif