Files @ r15321:b66ded98380f
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Location: cpp/openttd-patchpack/source/src/saveload/cargopacket_sl.cpp

frosch
(svn r19972) -Change: Use the md5sum from the previous save of the game for BaNaNaS instead of the initial (when the grf was added) md5sum from the gamelog. Neither method is 'better', but this way it is independent from the gamelog.
/* $Id$ */

/*
 * 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 cargopacket_sl.cpp Code handling saving and loading of cargo packets */

#include "../stdafx.h"
#include "../vehicle_base.h"
#include "../station_base.h"

#include "saveload.h"

/* static */ void CargoPacket::AfterLoad()
{
	if (CheckSavegameVersion(44)) {
		Vehicle *v;
		/* If we remove a station while cargo from it is still enroute, payment calculation will assume
		 * 0, 0 to be the source of the cargo, resulting in very high payments usually. v->source_xy
		 * stores the coordinates, preserving them even if the station is removed. However, if a game is loaded
		 * where this situation exists, the cargo-source information is lost. in this case, we set the source
		 * to the current tile of the vehicle to prevent excessive profits
		 */
		FOR_ALL_VEHICLES(v) {
			const VehicleCargoList::List *packets = v->cargo.Packets();
			for (VehicleCargoList::ConstIterator it(packets->begin()); it != packets->end(); it++) {
				CargoPacket *cp = *it;
				cp->source_xy = Station::IsValidID(cp->source) ? Station::Get(cp->source)->xy : v->tile;
				cp->loaded_at_xy = cp->source_xy;
			}
		}

		/* Store position of the station where the goods come from, so there
		 * are no very high payments when stations get removed. However, if the
		 * station where the goods came from is already removed, the source
		 * information is lost. In that case we set it to the position of this
		 * station */
		Station *st;
		FOR_ALL_STATIONS(st) {
			for (CargoID c = 0; c < NUM_CARGO; c++) {
				GoodsEntry *ge = &st->goods[c];

				const StationCargoList::List *packets = ge->cargo.Packets();
				for (StationCargoList::ConstIterator it(packets->begin()); it != packets->end(); it++) {
					CargoPacket *cp = *it;
					cp->source_xy = Station::IsValidID(cp->source) ? Station::Get(cp->source)->xy : st->xy;
					cp->loaded_at_xy = cp->source_xy;
				}
			}
		}
	}

	if (CheckSavegameVersion(120)) {
		/* CargoPacket's source should be either INVALID_STATION or a valid station */
		CargoPacket *cp;
		FOR_ALL_CARGOPACKETS(cp) {
			if (!Station::IsValidID(cp->source)) cp->source = INVALID_STATION;
		}
	}

	if (!CheckSavegameVersion(68)) {
		/* Only since version 68 we have cargo packets. Savegames from before used
		 * 'new CargoPacket' + cargolist.Append so their caches are already
		 * correct and do not need rebuilding. */
		Vehicle *v;
		FOR_ALL_VEHICLES(v) v->cargo.InvalidateCache();

		Station *st;
		FOR_ALL_STATIONS(st) {
			for (CargoID c = 0; c < NUM_CARGO; c++) st->goods[c].cargo.InvalidateCache();
		}
	}
}

/**
 * Wrapper function to get the CargoPacket's internal structure while
 * some of the variables itself are private.
 * @return the saveload description for CargoPackets.
 */
const SaveLoad *GetCargoPacketDesc()
{
	static const SaveLoad _cargopacket_desc[] = {
		     SLE_VAR(CargoPacket, source,          SLE_UINT16),
		     SLE_VAR(CargoPacket, source_xy,       SLE_UINT32),
		     SLE_VAR(CargoPacket, loaded_at_xy,    SLE_UINT32),
		     SLE_VAR(CargoPacket, count,           SLE_UINT16),
		     SLE_VAR(CargoPacket, days_in_transit, SLE_UINT8),
		     SLE_VAR(CargoPacket, feeder_share,    SLE_INT64),
		 SLE_CONDVAR(CargoPacket, source_type,     SLE_UINT8,  125, SL_MAX_VERSION),
		 SLE_CONDVAR(CargoPacket, source_id,       SLE_UINT16, 125, SL_MAX_VERSION),

		/* Used to be paid_for, but that got changed. */
		SLE_CONDNULL(1, 0, 120),

		SLE_END()
	};
	return _cargopacket_desc;
}

static void Save_CAPA()
{
	CargoPacket *cp;

	FOR_ALL_CARGOPACKETS(cp) {
		SlSetArrayIndex(cp->index);
		SlObject(cp, GetCargoPacketDesc());
	}
}

static void Load_CAPA()
{
	int index;

	while ((index = SlIterateArray()) != -1) {
		CargoPacket *cp = new (index) CargoPacket();
		SlObject(cp, GetCargoPacketDesc());
	}
}

extern const ChunkHandler _cargopacket_chunk_handlers[] = {
	{ 'CAPA', Save_CAPA, Load_CAPA, NULL, CH_ARRAY | CH_LAST},
};