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The determination of minimum pressure in calculate_max_limits_new()
in profile.c was wrong for a long time. Since the loop went over all
cylinders (even unused ones), the minimum pressure was always zero.
Since we loop only over used cylinders, the minimum pressure was
initialized to the lowest starting pressure of any cylinder.
If there were no events with pressure change, the minimum pressure
stayed unchanged, resulting in a funky scaling.
Instead, let's initialize the minimum pressure to the lowest ending
pressure.
Reported-by: Willem Ferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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When parsing of a timestamp failed (shouldn't happen) set the
timestamp to zero. This should give less unpredictable results
and silence a compiler warning.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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Instead of accessing the cylinder table directly, use the get_cylinder()
function. This gives less unwieldy expressions. But more importantly,
the function does bound checking. This is crucial for now as the code
hasn't be properly audited since the change to arbitrarily sized
cylinder tables. Accesses of invalid cylinder indexes may lead to
silent data-corruption that is sometimes not even noticed by
valgrind. Returning NULL instead of an invalid pointer will make
debugging much easier.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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The cylinderList() function collects all cylinder descriptions.
Instead of adding all cylinders, then sort, then removed duplicates,
keep a sorted list and only add non-existing elements. Find
existing elements by a binary search.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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The tab was crashing if there were no cylinders because
1) per_cylinder_mean_depth() would access non-existing cylinders.
2) TabDiveInformation::updateProfile() would access a non-existing
mean.
Fix both of these crash conditions by checking whether the dive
actually has cylinders.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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In getFormattedWeight() and getFormattedCylinder(), the indexes
were passed as unsigned ints. This makes no sense as the only
callers were using signed ints. Change the parameters to signed.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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As a convenience, return the cylinder from add_empty_cylinder()
to spare the caller from the nasty expression to fetch the
last cylinder.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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Most callers of this function accessed the newly generated cylinder
immediately after calling this function. Thus, for convenience,
return the added cylinder. This avoids a number of verbose expressions.
On the flip side, cylinder_start() now has to be cast to
function returning void in a the "nesting" function table.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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Instead of using fixed size arrays, use a new cylinder_table structure.
The code copies the weightsystem code, but is significantly more complex
because cylinders are such an integral part of the core.
Two functions to access the cylinders were added:
get_cylinder() and get_or_create_cylinder()
The former does a simple array access and supposes that the cylinder
exists. The latter is used by the parser(s) and if a cylinder with
the given id does not exist, cylinders up to that id are generated.
One point will make C programmers cringe: the cylinder structure is
passed by value. This is due to the way the table-macros work. A
refactoring of the table macros is planned. It has to be noted that
the size of a cylinder_t is 64 bytes, i.e. 8 long words on a 64-bit
architecture, so passing on the stack is probably not even significantly
slower than passing as reference.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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Thus, future callers will not have to include the monster dive.h
include if they just want to copy cylinders.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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Move the loop body of copy_cylinder_types() into its own function.
When using variable sized arrays, this loop will have to treat two
cases (overwrite cylinder and add new cylinder), so that makes things
more clear.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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merge_cylinders() used three bitmaps to identify cylinders used in
the first and second dive and matched cylinders. Even though nobody
will use more than 32 (or 64!) cylinders, replace these with
dynamically allocated bool-arrays for consistency with the rest
of the code.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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When calculating per-cylinder mean depths, bitfields were used to
keep track of "used" and "known" cylinders. Even though no sane
person will use more than 32 cylinders, turn this into dynamically
allocated arrays of bool for consistency with the rest of the code.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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To calculate sac rates, an array of used gases for every point on the
profile was used. This was implemented using unsigned int bitfields.
While nobody sane will ever use 32 or even 64 cylinders, for consistency
with the rest of the code, also change this to use dynamically
allocated arrays.
But allocate only once per shown profile, not once per sample.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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All accesses to the pressure data were converted to use functions.
Therefore it is now rather trivial to dynamically allocate the
pressure array and just change the functions.
The only thing to take care of is the idiosyncratic memory
management. Make sure to free and copy the buffer in the
appropriate places.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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The save_profiles_buffer() function was accessing the pressure
data directly. Instead, use the already existing funcions to
make transition to dynamically allocated pressure data more
seamless.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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The pressure data was directly accessed in fill_missing_tank_pressures().
Use the already existing functions so that the structures can be adapted
easily.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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The only apparent reason that this was a macro is that it automatically
increased the "index" and "entry" counts. But incrementing these explicitly
seems reasonable.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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Another plot-pressure-related function whose argument is converted
to an index.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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Continue with replacing pointers to struct plot_data entries
by indexes. Thus the pressure data can be kept in its own
array and can by dynamically sized.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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The goal here is to make it possible to detach the pressure related
data from the plot_info structure. Thus, the pressure related data
can be allocated independently depending on the number of cylinders
per dive.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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Dynamically allocate cylinder arrays in C code. This is a tiny
step in removing the MAX_CYLINDERS limitation.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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get_gas_used() returns the volume of used gases. Currently,
an array with MAX_CYLINDERS is passed in. If we want to make the
number of cylinders dynamic, the function must use an arbitrarilly
sized array.
Therefore, return a dynamically allocated array and free it
in the caller.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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Memory is cheap these days. Still, this was wasteful. On a 64 bit machine we
went from 1620 to 1592 bytes.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This is only used in Subsurface-mobile.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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When displaying segment or stop times in the planner notes, we always
round to the next full minute. This can mean for example that we
round down more often than rounding up with the result that the sum
of the segment times does not match the total runtime and can for example
lead to stops that are shown with 0min duration.
With this patch, we increase the reference time of the last display only
by the duration time actually shown. This way, the rounding errors don't
accumulate but having rounded down previously makes rounding up the next
time more propable.
Signed-off-by: Robert C. Helling <helling@atdotde.de>
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When computing the best mix for a target depth, for helium, one
can either require that the partial pressure of N2 is the same
as at the target depth or the partial pressure of N2 plus O2.
Signed-off-by: Robert C. Helling <helling@atdotde.de>
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We should call this function with two well defined dive_or_trip structures
which means that exactly one of the two values is set in each argument. But
in order to not have bugs elsewhere leed to crashes here, be more tolerant
of malformed argumnts.
Fixes CID 350100
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This should never happen based on the logic in the callers, but just
to be on the safe side.
Should fix CID 350128
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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We have these helper functions for exactly this purpose.
Found by Coverity. Fixes CID 350129
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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The native buffer of a membuffer is not NUL-terminated, so when you want
to detach it and use it as a C string, you had to first do
'mb_cstring()' that adds the proper termination/
This was all documented in the header files, and all but two users did
it correctly.
But there were those two users, and the exported interface was
unnecessarily hard to use. We do want the "just detach the raw buffer"
internally in the membuffer code, but let's not make the exported
interface be that hard to use.
So this switches the exported interface to be 'detach_cstring()', which
does that 'mb_cstring()' for you, and avoids the possibility that you'd
use a non-terminated memory buffer as a C string.
The old 'detach_buffer()' is now purely the internal membuffer
implementation, and not used by others.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Found by Coverity. CID 350081, 350087, 350095
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This seems excessively unlikely to actually fail. SEEK_END works, but SEEK_SET
fails? Oh well. Belts and suspenders.
Found by Coverity. Fixes CID 45039
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This prevents a resource leak.
Found by Coverity. Fixes CID 350080
The commit also includes some tiny whitespace/empty line fixes.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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I missed one file fixing this earlier.
Since we never did anything with the error string, why even ask for it.
And this way we don't have to deal with the memory returned, either.
Found by Coverity. Fixes CID 350082
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Found by Coverity. Fixes CID 350084
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Since we never did anything with the error string, why even ask for it.
And this way we don't have to deal with the memory returned, either.
Found by Coverity. Fixes CIDs 350124, 350113, 350106, 350099, 350091
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Even if there is a valid trip, we should not add a structure that isn't
a dive to it.
Found by Coverity. Fixes CID #350073
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Free resources allocated by alloc_dive() with free_dive().
Don't allocate and re-allocate a fixed two byte buffer on the heap.
Indirectly this fixes CID 216616
Suggested-by; Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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While this is debatably correct, free will happily accept (and ignore
the NULL pointer), so let's just always call it and make Coverity happy.
Fixes CID 45163
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Also reset the page stack to make sure we don't end up with stale data.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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The divesEdited signal sends the changed field as a parameter.
Since some undo-commands change multiple fields, this led to
numerous signals for a single command. This in turn would lead
to multiple profile-reloads and statistic recalculations.
Therefore, turn the enum into a bitfield. For simplicity,
provide a constructor that takes classical flags and turns
them into the bitfield. This is necessary because C-style
named initialization is only supported on C++20 onward!
Is this somewhat overengineered? Yes, maybe.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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The undo system sets updates individual dive fields on
redo respectively undo. Make salinity such a field, since
it is changed on replanning a dive.
To do this, break out the "update salinity" functionality
into its own function, add an entry to the DiveField enum
and add the corresponding switch-case.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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The dive-computer freeing code was local to dive.c. Implementing
the replan undo-command will need that functionality. Therefore,
export it as a global function.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
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Found by Coverity. Fixes CID 350123
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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At least in one of the logs we saw there seemed to be trailing spaces.
It should be enough for the BT name to start with "Mares Genius" in
order to be recognized.
Suggested-by: Jef Driesen <jef@libdivecomputer.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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We don't have the "show all dive computers" logic on mobile, so we need
something like this.
Possibly we should use the libdivecomputer matching code if it exists,
but that's a much bigger change, let's do this incremental one for now.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Thie way we can use it from the dive list model.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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We'll use them from the model in order to avoid creating this many
DiveObjectHelpers when showing a dive.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This is disabled by default - but when compiled in it makes it a lot
easier to pinpoint why we are creating so many DiveObjectHelpers.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Berthold Stoeger
Dirk Hohndel
Robert C. Helling
Linus Torvalds