We should not care if the dive has the same address in memory. We care if
it is the same dive (by using the unique ID).
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
In a dive, when you choose a very low GFlow (like 5 or 9) and a trimix
with quite some He (12/48 in the example) and descend fast, the ceiling
seems to do strange things in the first minutes of the dive (very very
deep for example or jumping around).
To understand what is going on we have to recall what gradient factors do
in detail: Plain Buehlmann gives you for each tissue a maximal inert gas
pressure that is a straight line when plotted against the ambient
pressure. So for each depth (=ambient pressure) there is a maximally
allowed over-pressure.
The idea of gradient factors is that one does not use all the possible
over-pressure that Buehlmann gives us but only a depth dependent fraction.
GFhigh is the fraction of the possible over-pressure at the surface while
GFlow is the fraction at the first deco stop. In between, the fraction is
linearly interpolated. As the Buehlmann over-pressure is increasing with
depth and typically also the allowed overpressure after applications of
gradient factors increases with depth or said differently: the tissue
saturation has to be lower if the diver wants to ascent.
The main problem is: What is the first stop (where to apply GFlow)? In a
planned dive, we could take the first deco stop, but in a real dive from a
dive computer download it is impossible to say what constitutes a stop and
what is only a slow ascent?
What I have used so far is not exactly the first stop but rather the first
theoretical stop: During all of the dive, I have calculated the ceiling
under the assumption that GFlow applies everywhere (and not just at a
single depth). The deepest of these ceilings I have used as the “first
stop depth”, the depth at which GFlow applies.
Even more, I only wanted to use the information that a diver has during
the dive, so I actually only considered the ceilings in the past (and not
in the future of a given sample).
But this brings with it the problem that early in the dive, in particular
during the descent the lowest ceiling so far is very shallow (as not much
gas has built up in the body so far).
This problem now interferes with a second one: If at the start of the dive
when the all compartments have 790mbar N2 the diver starts breathing a
He-heavy mix (like 12/48) and descents fast the He builds up in the
tissues before the N2 can diffuse out. So right at the start, we already
encounter high tissue loadings.
If now we have a large difference between GFhigh and GFlow but they apply
at very similar depth (the surface and a very shallow depth of the deepest
ceiling (which for a non-decompression dive would be theoretically at
negative depth) so far) it can happen that the linear interpolation as
opposite slope then in the typical case above: The allowed over-pressure
is degreasing with depth, shallower depth do not require lower gas loading
in the tissue (i.e. can be reached after further off-gasing) but but
tolerate higher loadings. In that situation the ceiling disappears (or is
rather a floor).
So far, I got rid of that problem, by stating that the minimum depth for
GFlow was 20m (after all, GFlow is about deep stops, so it should better
not be too shallow). Now the dive reported in ticket #549 takes values to
an extreme in such away that 20m (which is determined by
buehlmann_config.gf_low_position_min in deco.c) was not enough to prevent
this inversion problem (or in a milder form that the interpolation of
gradient factors is in fact an extrapolation with quite extreme values).
This patch that gets rid of the problem for the dive described above but
still it is possible to find (more extreme) parameter choices that lead to
non-realistic ceilings.
Let me close by pointing out that all this is only about the descent, as
it is about too shallow depth for GFlow. So no real deco (i.e. later part
of the dive) is inflicted. This is only about a theoretical ceiling
displayed possibly in the first minutes of a dive. So this is more an
aesthetically than a practical problem.
Fixes#549
Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
In commit e58f54cac1 ("Fix ATM-vs-bar confusion") Linus broke the CNS
calculations; The partial pressure is fraction of gas times ambient
pressure, not divided by.
[Dirk Hohndel: identical patch sent by Robert and Anton; I combined the
commit messages and added the ACK from the perpetrator]
Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Anton Lundin <glance@acc.umu.se>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
The brainless idiot who implemented commit c539c8f861 ("Remove the .used
member of the cylinder structure") clearly worked on the basis of "it
compiles, it must be perfect".
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
1) All the variables in the sample structures are strongly typed
2) Two additional types were declared in units.h:
o2pressure_t
bearing_t
3) The following variables were added:
diluentpressure
o2setpoint
o2sensor[3]
4) Changes to a number of files were made to chanf
sample->po2 to sample->po2.mbar
bearing to bearring.degrees
Signed-off-by: Willem Ferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Instead calculate this information on the fly, taking into account all
dive computers on the dive in questions.
There is one wrinkle to this - previously we abused the '.used' member to
make sure that a manually added cylinder didn't disappear the moment it
was added (think of the workflow: you add a cylinder, then you add a gas
change to that cylinder -> right after you add it it is unused and would
not be shown).
I am thinking that we might have to add the "manually_added" property to
the properties that we store in XML / git.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
We should never pass permille values around as integers. And we shouldn't
have to decode the stupid value in more than one place.
This doesn't tackle all the places where we access O2 and He "too early"
and should instead keep passing around a gaxmix. But it's a first step.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This also fixes a couple of issues with the existing code:
- removes a memory leak
- treats null and "" the same
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
First step towards getting the "add to trip" logic in the divelist context
menu to be consistent and correct.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
We used to do this just for dive computer downloads, but we should do it
for all imports, so that merging new import data always does the
expected thing: any new dive computers will be added to the end of the
list of preexisting dives, rather than the other way around.
(Of course, if you set the "prefer downloaded" flag, that reverses this
logic, and makes the newly imported dive computer data be the primary
dive computer. That flag is currently only exported for dive computer
downloads, not for imports).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
C specs says that we can safelly free a NULL pointer, so there's no reason
to check if it's null before freeing it.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Now when we have a used flag on every cylinder that are set in
mark_used_tanks we can use it here.
Signed-off-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
They happen - maybe the cylinder actually warmed up, or maybe the user
entered just a ending pressure without a starting pressure. Regardless,
just ignore cylinder pressure changes that go up.
Also ignore cylinders with a zero ending pressure: that's really a
*missing* pressure rather than an actual zero pressure. As Dirk says,
the scuba regulators don't even work without a healthy positive pressure
differential, so even when you breathe down a tank to "empty", it won't
be at zero pressure (this is true even with gauge pressure, where zero
means "atmospheric pressure").
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
So this is totally unrelated to the git repository format, except for
the fact that I noticed it while writing the git saving code.
The subsurface divetag list handling is being stupid, and has a
initial dummy entry at the head of the list for no good reason.
I say "no good reason", because there *is* a reason for it: it allows
code to avoid the special case of empty list and adding entries to
before the first entry etc etc. But that reason is a really *bad*
reason, because it's valid only because people don't understand basic
list manipulation and pointers to pointers.
So get rid of the dummy element, and do things right instead - by
passing a *pointer* to the list, instead of the list. And then when
traversing the list and looking for a place to insert things, don't go
to the next entry - just update the "pointer to pointer" to point to
the address of the next entry. Each entry in a C linked list is no
different than the list itself, so you can use the pointer to the
pointer to the next entry as a pointer to the list.
This is a pet peeve of mine. The real beauty of pointers can never be
understood unless you understand the indirection they allow. People
who grew up with Pascal and were corrupted by that mindset are
mentally stunted. Niklaus Wirth has a lot to answer for!
But never fear. You too can overcome that mental limitation, it just
needs some brain exercise. Reading this patch may help. In particular,
contemplate the new "taglist_add_divetag()".
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
tissue_tolerance wasn't used after it was assigned.
type was overwritten after it was assigned.
serial was overwritten after the last /= 100.
event is assigned in the for loop.
clear isn't used after the assignment
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Minor change to the perl postprocessing script and resulting changes to
the affected source files.
This deals with two issues:
- "foreach"-like structures were not always treated correctly
- some longer calculations that ended on "+ constant" were reformatted in
a rather unatractive manner
In one source file (divelist.c) I ended up adding braces to the sources...
trying to cascade the indentation further down without having the block
there seemed a lot more trouble than it's worth.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
I know everyone will hate it.
Go ahead. Complain. Call me names.
At least now things are consistent and reproducible.
If you want changes, have your complaint come with a patch to
scripts/whitespace.pl so that we can automate it.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
rint() is "round to nearest integer", and does a better job than +0.5
(followed by the implicit truncation inherent in integer casting). We
already used 'rint()' for values that could be negative (where +0.5 is
actively wrong), let's just make it consistent.
Of course, as is usual for the messy C math functions, it depends on the
current rounding mode. But the default round-to-nearest is what we want
and use, and the functions that explicitly always round to nearest
aren't standard enough to worry about.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
SAC should be calculated in relationship to surface pressure, not "1 bar".
I also realize that we have a few other cases where we do the same
mistake: the partial pressure calculations do things like
po2 = o2 / 1000.0 * depth_to_mbar(sample->depth.mm, dive);
which is wrong as well - the partial pressure is also relative to
standard atmospheric pressures.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Earlier we converted the C++ code to using true/false, and this converts
the C code to using the same style.
We already depended on stdbool.h in subsurfacestartup.[ch], and we build
with -std=gnu99 so nobody could build subsurface without a c99 compiler.
[Dirk Hohndel: small change suggested by Thiago Macieira: don't include
stdbool.h for C++]
Signed-off-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
We try to do the most reasonable thing. If you have an existing dive and
merge a just downloaded dive with it - the you want the existing id.
If you merge two consecutive dives, then the start of the merged dive is
the earlier of those two dives so we keep that id.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
When toggling autogroup in the menu we ended up setting the NO_TRIP flag
for dives that were removed from a trip that was created by autogroup. So
toggling things on and off and on again meant no more auto grouping.
Fixes#337
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
calculate_cns():
The check if prev_dive is NULL should be before calling
prev_dive->when.
Reported by the program cppcheck.
Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
this is probably more a workaround than a proper fix to a problem which
I think only happens if started with no dive loaded and then create one.
in that case, deselect_dive is called after saving the dive but probalby
before it was added to the dive list properly resulting in an underflow
of amount_selected.
Signed-off-by: Martin Gysel <me@bearsh.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Two errors fixed.
- With no location set, the summary line would start with a ','.
- When auto creating a trip for a manually added dive or when editing the
dates of dives in a trip, the timestamp for the trip was not updated
after editing the dive.
Fixes#293
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This patch removes a duplicated method: get_divenr and
get_index_for_dive. The two are exactly the same ( if my
c is not broken, but I may be broken since I'm working like
crazy for almost 30h nonstop. ), so please take a good look
before applying this one.
[Dirk Hohndel: Tomaz took the slightly broken of the two implementations,
so I switched that out for the correct one]
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
The new implementation supports custom tags
which are provided by the user as well as
default tags which are provided by subsurface.
Default tags can be translated and will be written
to XML in their non-localized form.
Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
divelist.c:
get_dive_date_string()
get_short_dive_date_string()
get_trip_date_string()
MinGW support for *printf and parameter positions (e.g. %1$d)
is horribly broken. Instead of implementing *proper* support
for this feature Microsoft decide to ignore the standard (again)
and they implement new functions with the '_p' suffix,
such as 'sprintf_p', which seem to be available from a 2003 runtime.
To top that 'sprintf_p' is not really a 'sprintf' but rather
a 'snprintf'.
It seems that the MinGW people ignore the issue and do not provide
wrappers of any sort, or at least for the current recommended compiler
for Qt 4.8.5 on Windows - which is a 4.4.0. A note of warning;
inspecting how MinGW does certain things in headers such as stdio.h,
can ensue bad dreams or other negative effects on to the viewer.
This forces us to move the following functions from the 'back-end'
(divelist.c) to the 'front-end' (qt-gui.cpp) and use QString.
Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This may seem like a really odd change - but with this change the Qt tools
can correctly parse the C files (and qt-gui.cpp) and get the context for
the translatable strings right.
It's not super-pretty (I'll admit that _("string literal") is much easier
on the eye than translate("gettextFromC", "string literal") ) but I think
this will be the price of success.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
- remove the build flags and libraries from the Makefile / Configure.mk
- remove the glib types (gboolean, gchar, gint64, gint)
- comment out / hack around gettext
- replace the glib file helper functions
- replace g_ascii_strtod
- replace g_build_filename
- use environment variables instead of g_get_home_dir() & g_get_user_name()
- comment out GPS string parsing (uses glib utf8 macros)
This needs massive cleanup, but it's a snapshot of what I have right now, in
case people want to look at it.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
One more corner case that we cover correctly.
Reported-by: Henrik Brautaset Aronsen <subsurface@henrik.synth.no>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This is fairly straight forward. What I dislike is the check for the magic
number of "14 indeces". I'm sure there's a better way to tell if more than
one dive is selected...
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This data structure was quite fragile and made 'undo' when editing
rather hard to implement. So instead I decided to turn this into a
QMultiMap which seemed like the ideal data structure for it.
This map holds all the dive computer related data indexed by the model. As
QMultiMap it allows multiple entries per key (model string) and
disambiguates between them with the deviceId.
This commit turned out much larger than I wanted. But I didn't manage to
find a clean way to break it up and make the pieces make sense.
So this brings back the Ok / Cancel button for the dive computer edit
dialog. And it makes those two buttons actually do the right thing (which
is what started this whole process). For this to work we simply copy the
map to a working copy and do all edits on that one - and then copy that
over the 'real' map when we accept the changes.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
