From: robertlipe <robertlipe@gmail.com>
Date: Sat, 8 Dec 2012 07:52:13 +0000 (+0000)
Subject: Lowranceusr4: don't try to compute date on invalid input.
X-Git-Tag: archive/raspbian/1.10.0+ds-2+rpi1~1^2~12^2~11^2~744
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=1ca40532d35590ded2bbe92877efbbaa64993652;p=gpsbabel.git

Lowranceusr4: don't try to compute date on invalid input.
---

diff --git a/gpsbabel/lowranceusr4.c b/gpsbabel/lowranceusr4.c
index f83164ccc..7c00c01fe 100644
--- a/gpsbabel/lowranceusr4.c
+++ b/gpsbabel/lowranceusr4.c
@@ -437,7 +437,14 @@ lowranceusr4_parse_waypoints(void)
        time is a unix timestamp. */
     create_date = gbfgetint32(file_in);
     create_time = gbfgetint32(file_in);
-    wpt_tmp->creation_time = lowranceusr4_get_timestamp(create_date, create_time);
+
+    // Julian date 2440487 is 1/1/1970.  If that's the date we're working
+    // with, as a practical matter, we have no date, so don't even compute
+    // or set it.
+    if (create_date > 2440587) {
+      wpt_tmp->creation_time = lowranceusr4_get_timestamp(create_date,
+                                                          create_time);
+    }
 
     /* Unused byte */
     gbfgetc(file_in);