1 files changed, 10 insertions, 0 deletions
diff --git a/main.c b/main.c
index 64710f2..10f7440 100644
--- a/main.c
+++ b/main.c
@@ -23,6 +23,8 @@
 #include "config.h"
 
 #include <stdlib.h>
+#include <stdarg.h>
+#include <stdio.h>
 #include <string.h>
 #include <fcntl.h>
 #include <unistd.h>
@@ -33,12 +35,20 @@
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <time.h>
+#include <sys/time.h>
 #include <X11/keysym.h>
 #include <X11/XF86keysym.h>
 
 #define MODMASK(mask) ((mask) & USED_MODMASK)
 #define BAR_SEP "  "
 
+#define TV_DIFF(t1,t2) (((t1)->tv_sec  - (t2)->tv_sec ) * 1000 + \
+                        ((t1)->tv_usec - (t2)->tv_usec) / 1000)
+#define TV_ADD_MSEC(tv,t) {             \
+  (tv)->tv_sec  += (t) / 1000;          \
+  (tv)->tv_usec += (t) % 1000 * 1000;   \
+}
+
 typedef struct {
 	struct timeval when;
 	bool active;