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[gpsd-dev] STATUS_DGPS_FIX is never reported by libgps

From: Ahti Heinla
Subject: [gpsd-dev] STATUS_DGPS_FIX is never reported by libgps
Date: Mon, 20 Oct 2014 10:27:57 +0300
User-agent: KMail/4.10.5 (Linux/3.9.9-030909-generic; KDE/4.10.5; x86_64; ; )


        Although gps.h documents that gps_data_t status field can have a value
STATUS_DGPS_FIX, in practice libgps reports STATUS_FIX while in fact it knows
it has a DGPS fix.

        When libgps accesses gpsd via the socket interface, this results from 
the fact
that socket protocol as documented simply does not include information on 
the fix is DGPS or non-DGPS.

        When libgps accesses gpsd via shm interface, this results from 
having specific code to ignore gpsdata->status, and instead set it based on
gpsdata->fix.mode (which does not include DGPS information):

            if ((gpsdata->set & REPORT_IS)!=0) {
                if (gpsdata->fix.mode >= 2)
                    gpsdata->status = STATUS_FIX;
                    gpsdata->status = STATUS_NO_FIX;
                gpsdata->set = STATUS_SET;

        Any comments? Should the documentation in gps.h be changed, or steps
be taken to actually report STATUS_DGPS_FIX when it is due?


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