cpp/openttd-patchpack/source Files · src/saveload/airport_sl.cpp

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Patric Stout

Feature: framework to make savegames self-descriptive

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 file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file airport_sl.cpp Code handling saving and loading airport ids */

#include "../stdafx.h"

#include "saveload.h"
#include "newgrf_sl.h"

#include "../safeguards.h"

static void Save_APID()
{
	Save_NewGRFMapping(_airport_mngr);
}

static void Load_APID()
{
	Load_NewGRFMapping(_airport_mngr);
}

static void Save_ATID()
{
	Save_NewGRFMapping(_airporttile_mngr);
}

static void Load_ATID()
{
	Load_NewGRFMapping(_airporttile_mngr);
}

static const ChunkHandler airport_chunk_handlers[] = {
	{ 'ATID', Save_ATID, Load_ATID, nullptr, nullptr, CH_ARRAY },
	{ 'APID', Save_APID, Load_APID, nullptr, nullptr, CH_ARRAY },
};

extern const ChunkHandlerTable _airport_chunk_handlers(airport_chunk_handlers);