Before, a non-owning pointer was passed and the dive moved
away from the dive. Instead, let the caller decide if they
still want to keep a copy of the dive, or give up ownership:
In MainWindow and QMLManager new dives are generated, so
one might just as well give up ownership. In contrast,
the planner works on a copy (originally the infamous
"displayed_dive") and now moves the data manually.
This commit also removes duplicate code, by moving the
"create default dive" code from MainWindow and QMLManager
to struct dive.
Finally, determination of the "time zone offset" is not done
in POSIX, since we want to avoid calls form the core into
Qt.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Return an std::string to avoid memory management headaches.
While doing that, convert time.c to C++ so that
format_datetime directly returns an std::string.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Weirdly, this function was declared in dive.h and defined in
subsurface-startup.c. Let's move declaration and definition to
more appropriate places, viz. subsurface-time.h and time.c.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
To save datetime-based filter constraints to git or XML,
it is preferrable to use human-readable representations.
Therefore, add helper functions to format / parse timestamp_t
64-bit values in the "YYYY-MM-DD hh:mm:ss" format.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
To support the new filter code, add helper functions that turn timestamps
into year and day-of-week to core/time.c.
Internally, these functions simply call utc_mktime() to break down the
timestamp and then extract the wanted value. This may appear inefficient,
but testing shows that modern compilers are quite effective in throwing
away the unneeded calculations. FWIW in this respect clang10 outperformed
gcc10.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
No point in slurping in all of dive.h for translation units that only
want to do some time manipulation without ever touching a dive.
Don't call the header "time.h", because we don't want to end up in a
confusion with the system header of the same name.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
