In utc_mkdate() we find the interesting statement
val = timestamp /= 60;
which not only calculates timestamp / 60, but also overwrites
timestamp with the new value. However, timestamp is never used
in the remainder of the function, because the whole point is to
switch to 32-bit types. Thus, replace the division-assignment
by a simple division operator to avoid head-scratching.
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>
The Qt model sorting for the dive date was using a unsigned number,
which doesn't work for dates before 1970.
Also, the dive date parsing got the year 1900 wrong. Not that we really
care, because other parts of date handling will screw up with any date
before the year 1904. So if you claim to be diving before 1904, you get
basically random behavior.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
It turns out that we are starting to have users that have logs that go
back that far. It won't be common, but let's get it right anyway.
NOTE! With us now supporting dates earlier in 1900, this also makes
"utc_mktime()" always add the "1900" to the year field. That way we
avoid ever using the fairly ambiguous two-digit shorthand.
It didn't use to be all that ambiguous when we knew that any two-digit
number less than 70 had to be 2000+. Now that we support going back to
earlier in the last centiry, that certainty is eroding.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Having subsurface-core as a directory name really messes with
autocomplete and is obviously redundant. Simmilarly, qt-mobile caused an
autocomplete conflict and also was inconsistent with the desktop-widget
name for the directory containing the "other" UI.
And while cleaning up the resulting change in the path name for include
files, I decided to clean up those even more to make them consistent
overall.
This could have been handled in more commits, but since this requires a
make clean before the build, it seemed more sensible to do it all in one.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
