Fix a carry error in TS_SUB()

TS_SUB getting pretty big.  It should probably be a function.

Will also need a function to format a timespec as a nice string.

1 files changed, 3 insertions, 3 deletions

diff --git a/monitor_sirf.c b/monitor_sirf.c
index 6ef24c19..2b8e642f 100644
--- a/monitor_sirf.c
+++ b/monitor_sirf.c
@@ -593,19 +593,19 @@ static void sirf_update(void)
     if (pps_thread_lastpps(&session, &drift) > 0) {
 	/* NOTE: can not use double here due to precision requirements */
 	struct timespec timedelta;
-        int sign = ' ';
+        char sign = ' ';
 	TS_SUB( &timedelta, &drift.clock, &drift.real);
         if ( 86400 < (long)labs(timedelta.tv_sec) ) {
 	    /* more than one day off, overflow */
             /* need a bigger field to show it */
 	    (void)mvwprintw(mid7win, 2, 39, "> 1 day");
         } else {
-	    if ( 0 > timedelta.tv_nsec ) {
+	    if ( (0 > timedelta.tv_nsec ) || ( 0 > timedelta.tv_sec ) ) {
 		sign = '-';
 	    }
 	    (void)mvwprintw(mid7win, 4, 39, "%c%ld.%09ld",
 				  sign,
-			          (long)timedelta.tv_sec,
+			          (long)labs(timedelta.tv_sec),
 				  (long)labs(timedelta.tv_nsec));
         }
 	(void)wnoutrefresh(mid7win);