divelog: turn owning-pointers into unique_ptr<>s

Since everything is C++ now, we can use unique_ptr<>s. This makes
the code significantly shorter, because we can now use the default
move constructor and assignment operators.

This has a semantic change when std::move()-ing the divelog:
now not the contents of the tables are moved, but the pointers.
That is, the moved-from object now has no more tables and
must not be used anymore. This made it necessary to replace
std::move()s by std::swap()s. In that regard, the old code was
in principle broken: it used moved-from objects, which may work
but usually doesn't.

This commit adds a myriad of .get() function calls where the code
expects a C-style pointer. The plan is to remove virtually all of
them, when we move free-standing functions into the class it acts
on. Or, replace C-style pointers by references where we don't support
NULL.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2024-05-13 19:34:43 +02:00 committed by bstoeger
parent 6e352d5281
commit d242198c99
22 changed files with 113 additions and 138 deletions

View file

@ -1000,14 +1000,14 @@ static QString get_dive_only_date_string(timestamp_t when)
QString get_first_dive_date_string()
{
const dive_table *dives = divelog.dives;
return dives->nr > 0 ? get_dive_only_date_string(dives->dives[0]->when) : gettextFromC::tr("no dives");
const dive_table &dives = *divelog.dives;
return dives.nr > 0 ? get_dive_only_date_string(dives.dives[0]->when) : gettextFromC::tr("no dives");
}
QString get_last_dive_date_string()
{
const dive_table *dives = divelog.dives;
return dives->nr > 0 ? get_dive_only_date_string(dives->dives[dives->nr - 1]->when) : gettextFromC::tr("no dives");
const dive_table &dives = *divelog.dives;
return dives.nr > 0 ? get_dive_only_date_string(dives.dives[dives.nr - 1]->when) : gettextFromC::tr("no dives");
}
std::string get_current_date()