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_ubx.c b/monitor_ubx.c
index a50d5d3f..2256d9e3 100644
--- a/monitor_ubx.c
+++ b/monitor_ubx.c
@@ -260,19 +260,19 @@ static void ubx_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(ppswin, 1, 13, "> 1 day");
         } else {
-	    if ( 0 > timedelta.tv_nsec ) {
+	    if ( (0 > timedelta.tv_nsec ) || ( 0 > timedelta.tv_sec ) ) {
 		sign = '-';
 	    }
 	    (void)mvwprintw(ppswin, 1, 13, "%c%ld.%09ld",
 		              sign,
-			      (long)timedelta.tv_sec,
+			      (long)labs(timedelta.tv_sec),
                               (long)labs(timedelta.tv_nsec));
         }
 	(void)wnoutrefresh(ppswin);