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/*
* 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"
#include "../safeguards.h"
/**
* Savegame conversion for cargopackets.
*/
/* static */ void CargoPacket::AfterLoad()
{
if (IsSavegameVersionBefore(SLV_44)) {
/* If we remove a station while cargo from it is still en route, 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 (const Vehicle *v : Vehicle::Iterate()) {
const CargoPacketList *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 */
for (Station *st : Station::Iterate()) {
for (CargoID c = 0; c < NUM_CARGO; c++) {
GoodsEntry *ge = &st->goods[c];
const StationCargoPacketMap *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 (IsSavegameVersionBefore(SLV_120)) {
/* CargoPacket's source should be either INVALID_STATION or a valid station */
for (CargoPacket *cp : CargoPacket::Iterate()) {
if (!Station::IsValidID(cp->source)) cp->source = INVALID_STATION;
}
}
if (!IsSavegameVersionBefore(SLV_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. */
for (Vehicle *v : Vehicle::Iterate()) v->cargo.InvalidateCache();
for (Station *st : Station::Iterate()) {
for (CargoID c = 0; c < NUM_CARGO; c++) st->goods[c].cargo.InvalidateCache();
}
}
if (IsSavegameVersionBefore(SLV_181)) {
for (Vehicle *v : Vehicle::Iterate()) v->cargo.KeepAll();
}
}
/**
* Wrapper function to get the CargoPacket's internal structure while
* some of the variables itself are private.
* @return the saveload description for CargoPackets.
*/
SaveLoadTable 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, SLV_125, SL_MAX_VERSION),
SLE_CONDVAR(CargoPacket, source_id, SLE_UINT16, SLV_125, SL_MAX_VERSION),
/* Used to be paid_for, but that got changed. */
SLE_CONDNULL(1, SL_MIN_VERSION, SLV_121),
};
return _cargopacket_desc;
}
/**
* Save the cargo packets.
*/
static void Save_CAPA()
{
for (CargoPacket *cp : CargoPacket::Iterate()) {
SlSetArrayIndex(cp->index);
SlObject(cp, GetCargoPacketDesc());
}
}
/**
* Load the cargo packets.
*/
static void Load_CAPA()
{
int index;
while ((index = SlIterateArray()) != -1) {
CargoPacket *cp = new (index) CargoPacket();
SlObject(cp, GetCargoPacketDesc());
}
}
/** Chunk handlers related to cargo packets. */
static const ChunkHandler cargopacket_chunk_handlers[] = {
{ 'CAPA', Save_CAPA, Load_CAPA, nullptr, nullptr, CH_ARRAY },
};
extern const ChunkHandlerTable _cargopacket_chunk_handlers(cargopacket_chunk_handlers);
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