From a047465a7330ffd8b95eff81f099bccabdae1f78 Mon Sep 17 00:00:00 2001
From: Rick Sellens <sellensr@gmail.com>
Date: Fri, 7 Feb 2020 14:26:39 -0500
Subject: [PATCH] More rigor in parseTime()

previous version ran ok with M0, but generated exceptions in ESP32 when decimals not found.
---
 src/NMEA_parse.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/NMEA_parse.cpp b/src/NMEA_parse.cpp
index 97d603a..652becd 100644
--- a/src/NMEA_parse.cpp
+++ b/src/NMEA_parse.cpp
@@ -768,8 +768,11 @@ bool Adafruit_GPS::parseTime(char *p) {
     hour = time / 10000;
     minute = (time % 10000) / 100;
     seconds = (time % 100);
-    p = strchr(p, '.');
-    milliseconds = atof(p) * 1000;
+    char *dec = strchr(p, '.');
+    char *comstar = min(strchr(p, ','), strchr(p, '*'));
+    if(dec != NULL && comstar != NULL && dec < comstar)
+      milliseconds = atof(p) * 1000;
+    else milliseconds = 0;
     lastTime = sentTime;
     return true;
   }