This just adds the basic structures and the accessor functions needed to
manage a table of fingerprint data. The table is indexed by the hash of
the model name and binary serial number as created by libdivcecomputer.
This way the data is accessible when libdivecomputer fist accesses a
dive computer (which is the point in time when we need to use the
fingerprint.
The table also contains the corresponding device id and dive id so we
can verify that the current dive table still contains that dive.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This makes it much easier to manipulate dc nickname entries. In order
for that to work we can't simply remove entries with empty nickname (but
that isn't needed, anyway, as the code that saves XML or git already
handles that case correctly).
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
We have this odd legacy notion of a divecomputer 'device', that was
originally just basically the libdivecomputer 'EVENT_DEVINFO' report
that was associated with each dive. So it had firmware version,
deviceid, and serial number.
It had also gotten extended to do 'nickname' handling, and it was all
confusing, ugly and bad. It was particularly bad because it wasn't
actually a 'per device' thing at all: due to the firmware field, a dive
computer that got a firmware update forced a new 'device'.
To make matters worse, the 'deviceid' was also almost random, because
we've calculated it a couple of different ways, and libdivecomputer
itself has changed how the legacy 32-bit 'serial number' is expressed.
Finally, because of all these issues, we didn't even try to make the
thing unique, so it really ended up being a random snapshot of the state
of the dive computer at the time of a dive, and sometimes we'd pick one,
and sometimes another, since they weren't really well-defined.
So get rid of all this confusion.
The new rules:
- the actual random dive computer state at the time of a dive is kept
in the dive data. So if you want to know the firmware version, it
should be in the 'extra data'
- the only serial number that matters is the string one in the extra
data, because that's the one that actually matches what the dive
computer reports, and isn't some random 32-bit integer with ambiguous
formatting.
- the 'device id' - the thing we match with (together with the model
name, eg "Suunto EON Steel") is purely a hash of the real serial
number.
The device ID that libdivecomputer reports in EVENT_DEVINFO is
ignored, as is the device ID we've saved in the XML or git files. If
we have a serial number, the device ID will be uniquely associated
with that serial number, and if we don't have one, the device ID will
be zero (for 'match anything').
So now 'deviceid' is literally just a shorthand for the serial number
string, and the two are joined at the hip.
- the 'device' managament is _only_ used to track devices that have
serial numbers _and_ nicknames. So no more different device
structures just because one had a nickname and the other didn't etc.
Without a serial number, the device is 'anonymous' and fundamentally
cannot be distinguished from other devices of the same model, so a
nickname is meaningless. And without a nickname, there is no point in
creating a device data structure, since all the data is in the dive
itself and the device structure wouldn't add any value..
These rules mean that we no longer have ambiguous 'device' structures,
and we can never have duplicates that can confuse us.
This does mean that you can't give a nickname to a device that cannot be
uniquely identified with a serial number, but those are happily fairly
rare (and mostly older ones). Dirk said he'd look at what it takes to
give more dive computers proper serial numbers, and I already did it for
the Garmin Descent family yesterday.
(Honesty in advertizing: right now you can't add a nickname to a dive
computer that doesn't already have one, because such a dive computer
will not have a device structure. But that's a UI issue, and I'll sort
that out separately)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Recently the QStrings were replaced by std::strings in device.cpp
so that they can be accessed from C-code. However, libstd being
modelled after C, constructing a std::string from a NULL pointer
leads to a crash.
Fix one case where this was overlooked.
Moreover, replace a null-pointer check by empty_string(), to
treat NULL and "" equally.
Reported-by: Salvador Cuñat <salvador.cunat@gmail.com>
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Since dive.c is so huge, split out divecomputer-related functions
into divecomputer.[c|h], sample.[c|h] and extradata.[c|h].
This does not give huge compile time improvements, since
struct dive contains a struct divecomputer and therefore
dive.h has to include divecomputer.h. However, it make things
distinctly more clear.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
The undo machinery will need a method to remove devices based
on their index instead of their name. Add it.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Add commands for deleting devices and editing device nicknames
to include the device-handling in the undo system.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
The function was misnamed in that it doesn't set the nickname
of a device. Instead, it adds all (unknown) devices of a
dive to the/a device-table. Let's call it appropriately.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Add a device_table parameters to Command::importTable() and
add_imported_dives(). The content of this table will be added
to the global device list (respectively removed on undo).
This is currently a no-op, as the parser doesn't yet fill
out the device table, but adds devices directly to the global
device table.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
To include the device code in the undo system, we need functions
to check for the existence of devices and to add or remove them.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Recently, the sorting of the devices was changed to be
case-insensitive for models for consistency reasons. However,
then the equality-comparison should also be case-insensitive.
Break it out into its own function, to avoid that mistake
in the future.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
The code in core/libdivecomputer.c used string insensitive
comparison for device models, before being merged into core/device.c.
Let's reinstate that behavior, since it appears to be more logical.
On would assume that two different vendors will not use the same
model with different casing (and the same device-ids), so that
should be safe.
This uses strcoll to correctly sort unicode, which will hopefully
never be needed!
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
To search for devices with the same model, we used find_if().
However, that was only to check whether such a thing exists,
not to actually do something with said device.
Therefore, change this to std::any_of() to make it clear what
the purpose of the statement is.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Instead of accessing the global device table directly, add a parameter
to all device-table accessing functions. This makes all places in
the code that access the global device table grep-able, which is
necessary to include the device-table code in the undo system.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
We have a callback for all devices with a twist: it can loop
over those devices that are used by a selected dive. This is
used for exporting a subset of the dive log.
Factor out the "is device used by selected dive" part of the
function and make it available to C. The goal is to make
the whole callback thing unnecessary and let C code loop
directly over the device list.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This was not used. Moreover, mark device::operator==() for removal.
This is used for detecting changes in the DiveComputerModel. This
can be removed once that is integrated into the undo system.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
The function getDCExact() was used to search for a device structure
matching a divecomputer. Since C code can now access struct device,
we can export that function to C. Rename it to get_device_for_dc()
for consistency with naming of the core functions.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Up to now, "struct device" and "struct device_table" were C++
only, because they used C++ strings for convenience. Since we
switched from QString to std::string, we can create accessors
for these structs. For the C code, we simply declare them as
opaque structs and give the full definition only for C++.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Since we converted from QString to std::string, let's also use
std::vector instead of QVector. We don't need COW semantics
and all the rigmarole. Let's try to keep Qt data structures
out of the core.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
struct device is a core data structure and therefore shouldn't use QString.
QString stores as UTF-16 (which is a very questionable choice in itself).
However, the real problem is that this puts us in lifetime-management
hell when interfacing with C code: The UTF-16 has to be converted to
UTF-8, but when returning such a string, this puts burden on the caller
who has to free it. In fact, instead of looping over devices from C-code
we had a callback that sent down temporary C-strings with qPrintable.
In contrast, std::string is guaranteed to store its data as
contiguous null-terminated and C-compatible strings. Therefore,
replace the QString by std::string. Keep the QString just in
one place that formats a hexadecimal number to avoid any
potential change.
The disadvantage of using std::string is that it will crash
when constructed with a NULL argument, consistent with C-style
functions such as strcmp, etc. Arguably, NULL is different
from the empty string even though we treat both as the same.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
empty_string() returns true for "". Thus, we can't simply overwrite
the pointer if empyt_string() returns true, but must free the string
regardless. The joys of C memory management!
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Recently (c9b8584bd2) the sort criteria of the device-table
was changed from (model/id) to (id/model). However, that
messed with the detection of duplicate device names: there,
the code searched for the first element greater or equal
to (model / 0).
With the reversal of the sort criteria, this would now
always give the first element.
Therefore, do a simple non-binary search, which is much
more robust. The binary search was a silly and pointless
premature optimization anyway - don't do such things
if not necessary!
Since only one place in the code search for existence
for a model-name, fold the corresponding function into
that place.
Moreover, change the code to do a case-insensitive compare.
This is consistent with the dc_match_serial() code in
core/libdivecomputer.c, where matching models is
case-insensitive!
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
The device table is accessed by core via a callback using
call_for_each_dc(). This sorts the table by device-id. It
is unclear whether this is needed - since currently all it
does is make sure that the devices have a fixed order in XML
and git log files.
In any case, this means that the table had to be copied and
sorted in call_for_each_dc(). Since the frontend now does
its own sorting, we can just keep the core table sorted
as it needs it. This in turn will ultimately make it possible
to replace the callback by a simple loop.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
We keep track of device, i.e. distinct dive computers with id in the core.
The corresponding code stuck out like a sore thumb. Firstly, because it
is C++. But more importantly, because it used inconsistent nameing conventions.
Notably it defined a "DiveComputerNode" when this is something very different
from "struct dive_computer", the latter being the dive-computer related
data of a single dive.
Since the whole thing is defined in "device.h" and the function to create
such an entry is called "create_device_node", call the structure "device".
Use snake_case for consistency with the other core structures.
Moreover, call the collection of devices "device_table" in analogy
with "dive_table", etc.
Overall, this should make the core code more consistent style-wise.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
core/device.c used to be a C file, which couldn't access the C++
divecomputer list directly. Therefore, instead of a simple loop,
searching for a matching DC was implemented via a callback with
void * user data parameter. Wild. Since the file is now C++, let's
just use direct access to the C++ data structures to make this
readable by mere humans.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
These are used to search for device nodes and were passed model
and device id (for the exact version). However, all callers used
them to search for the node corresponding to a specific struct
divecomputer, so let's just pass that instead to make the caller
site less complex.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Remove the declaration of helper functions needed only in
core/device.cpp. To this goal, turn the member functions
into free functions.
Cosmetics: turn the DiveComputer[Node|List] "class"es into
"struct"s, since all members were public anyway.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
getDiveSelection() returns a vector of the selected dives.
Use that instead of looping over the dive table and checking
manually.
This removes a few lines of code.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
core/device.h was declaring a number of functions that were related
to divecomputers (dcs): creating a fake dc for manually entered dives
and registering / accessing dc nicknames. On could argue whether
these should be lumped together, but it is what it is.
However, part of that was implemented in C++/Qt code in a separate
core/divecomputer.cpp file. Some function therein where only
accessible to C++ and declared in core/divecomputer.h.
All in all, a big mess. Let's simply combine the files and
conditionally compile the C++-only functions depending on
the __cplusplus define.
Yes, that means turning device.c into device.cpp. A brave soul
might turn the C++/Qt code into C code if they whish later on.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
