Running under Valgrind showed a couple of silly bugs.
Worse, intentionally running into various error scenarios showed that we
could get the buffer handling in the raw parsing code to break down - we
would fail to process the correctly downloaded files.
To make it easier to get this right I restructured the code to collect the
XML buffer in a different way - this works much better and has stood up
well under testing so far.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Instead of trying to figure out in the GUI code whether to call the
downloader again, the logic was moved into the downloader itself. It now
attempts to deal cleverly with running out of space on the dive computer
filesystem - and in return is able to process the maximum number of dives
(instead of just ten or so at a time).
Even on partial reads before a failure we are able to collect the data
that was completely transferred and report those dives.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This includes one major hack that uses a private data structure from
libdivecomputer to allow us to show the Uemis Zurich as one computer the
user can import from.
Once the user has chosen the Uemis we don't use libdivecomputer but our
own downloader. Just like in the libdicecomputer case this runs in its own
thread and updates the import dialog with progress information.
The code also keeps track of the last dive that has been downloaded from a
Uemis computer so we only import new dives on subsequent downloads. And
since the Uemis Zurich gives us its device id, we make this a "per
divecomputer" property for people who dive with multiple Uemis Zurich
computers.
This uses the debugfile infrastructure to allow easily collecting
debugging output - especially on Windows where by default console output
is lost.
Known limitations: when the Uemis runs out of space (it uses its
filesystem for communication with the host computer) we have no graceful
way to reset things. This is why the code doesn't try to download ALL
dives on the computer but instead download them in increments of ten
dives. This clearly needs to be addressed once I understand how to reset
the device.
The Cancel button of the import dialog isn't correctly hooked up, yet.
I still need to figure out how to gracefully shut down a download without
potentially hanging the device.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
