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divelog: turn owning-pointers into unique_ptr<>s

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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
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4
core/save-xml.cpp
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@ -686,8 +686,8 @@ static void save_dives_buffer(struct membuffer *b, bool select_only, bool anonym
put_format(b, "<divelog program='subsurface' version='%d'>\n<settings>\n", DATAFORMAT_VERSION);
/* save the dive computer nicknames, if any */
for (int i = 0; i < nr_devices(divelog.devices); i++) {
const struct device *d = get_device(divelog.devices, i);
for (int i = 0; i < nr_devices(divelog.devices.get()); i++) {
const struct device *d = get_device(divelog.devices.get(), i);
if (!select_only || device_used_by_selected_dive(d))
save_one_device(b, d);
}