Make gpsdecode interpret "Date:" comments. All regression tests pass.

1 files changed, 23 insertions, 0 deletions

diff --git a/timebase.c b/timebase.c
index 7ab2079d..b69191b2 100644
--- a/timebase.c
+++ b/timebase.c
@@ -77,6 +77,10 @@ BSD terms apply: see the file COPYING in the distribution root for details.
 
 *****************************************************************************/
 
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
 #include "gpsd.h"
 #include "timebase.h"
 
@@ -116,6 +120,25 @@ void gpsd_time_init(struct gps_context_t *context, time_t starttime)
     }
 }
 
+void gpsd_set_century(struct gps_device_t *session)
+/*
+ * Interpret "Date: dd mmm yyyy", setting the session context
+ * century from the year.  We do this so the behavior of the
+ * regression tests won't depend on what century the daemon
+ * started up in.
+ */
+{
+    unsigned char *cp;
+    int year;
+    if (strstr((char *)session->packet.outbuffer, "Date:") != NULL) {
+	cp = session->packet.outbuffer + strlen((char *)session->packet.outbuffer) - 1;
+	while (isspace(*cp))
+	    --cp;
+	year = atoi((char *)cp - 4);
+	session->context->century = year - (year % 100);
+    }
+}
+
 #ifdef NMEA_ENABLE
 timestamp_t gpsd_utc_resolve(/*@in@*/struct gps_device_t *session)
 /* resolve a UTC date, checking for rollovers */