XML format change

Dirk Hohndel dirk at hohndel.org
Fri Jan 4 16:24:48 PST 2013

Linus Torvalds <torvalds at linux-foundation.org> writes:

> On Fri, Jan 4, 2013 at 8:24 AM, Dirk Hohndel <dirk at hohndel.org> wrote:
>> Linus, since we now use <model,deviceid> consistently throughout Subsurface to identify a dive computer, wouldn't it be smarter to switch the deviceid code to simply using the serial number?
> What's the format of the serial number? Some random string?
> More importantly, if Miika wants the serial number today, maybe he
> wants the firmware version tomorrow.  The point being, that if you
> want details about the dive computer, then they aren't about the
> *identity* testing of the dive computer, they are just that - random
> details about it.
> Which is absolutely something that we don't want to repeat for every
> dive. Think about the data structures, not the code.
> So I'd suggest solving it by:
>  - rename the "struct dcnicknamelist" as just "struct dc_info" (and
> export it into dive.h)
>  - rename "get_dc_nicknameentry()" as "get_dc_info()"
>  - add firmware/serialnumber/whatever entries to the dc_info
> structure, and fill them in as we download from the dive computer.
>  - save it in the xml in the settings thing, so that one dive computer
> is described in *one* place.
> That way you can add any information you want, without making the
> identity of the dive computer somehow be about that information, and
> without replicating it over and over for each dive.

There is still one problem with this. Our deviceid today includes the
firmware version. So if you upgrade your firmware, Subsurface thinks
that this is a different divecomputer and will not pick up the existing
nickname (or actually ask you for a new nickname for it).

Not terrible, but a bit unintuitive.


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