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Feature: framework to make savegames self-descriptive

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We won't be able to make it fully self-descriptive (looking at you
MAP-chunks), but anything else can. With this framework, we can
add headers for each chunk explaining how each chunk looks like
in detail.

They also will all be tables, making it a lot easier to read in
external tooling, and opening the way to consider a database
(like SQLite) to use as savegame format.

Lastly, with the headers in the savegame, you can freely add
fields without needing a savegame version bump; older versions
of OpenTTD will simply ignore the new field. This also means
we can remove all the SLE_CONDNULL, as they are irrelevant.

The next few commits will start using this framework.
This commit is contained in:
Patric Stout
2021-06-14 10:05:30 +02:00
committed by Patric Stout
parent 513641f9ba
commit 7dd5fd6ed4
20 changed files with 620 additions and 188 deletions
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8
src/saveload/ai_sl.cpp
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@@ -26,10 +26,10 @@ static std::string _ai_saveload_settings;
static bool _ai_saveload_is_random;
static const SaveLoad _ai_company[] = {
SLEG_SSTR(_ai_saveload_name, SLE_STR),
SLEG_SSTR(_ai_saveload_settings, SLE_STR),
SLEG_CONDVAR(_ai_saveload_version, SLE_UINT32, SLV_108, SL_MAX_VERSION),
SLEG_CONDVAR(_ai_saveload_is_random, SLE_BOOL, SLV_136, SL_MAX_VERSION),
SLEG_SSTR("name", _ai_saveload_name, SLE_STR),
SLEG_SSTR("settings", _ai_saveload_settings, SLE_STR),
SLEG_CONDVAR("version", _ai_saveload_version, SLE_UINT32, SLV_108, SL_MAX_VERSION),
SLEG_CONDVAR("is_random", _ai_saveload_is_random, SLE_BOOL, SLV_136, SL_MAX_VERSION),
};
static void SaveReal_AIPL(int *index_ptr)