core: C++-ify statistics.c

The old code was wild: For the yearly statistics it would allocate
one entry per dive in the log. Of course, it would also leak
C-style strings.

Convert the whole thing to somewhat idiomatic C++.

Somewhat wasted work, because I'd like to convert the whole thing
to the new statistics code. But let's finish the conversion to C++
first.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2024-05-01 23:16:00 +02:00 committed by bstoeger
parent 84219641de
commit 1daa4f0584
12 changed files with 496 additions and 582 deletions

View file

@ -431,7 +431,7 @@ static bool cylinder_used(const cylinder_t *cyl)
start_mbar = cyl->start.mbar ?: cyl->sample_start.mbar;
end_mbar = cyl->end.mbar ?: cyl->sample_end.mbar;
// More than 5 bar used? This matches statistics.c
// More than 5 bar used? This matches statistics.cpp
// heuristics
return start_mbar > end_mbar + SOME_GAS;
}