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Location: cpp/openttd-patchpack/source/src/cargopacket.cpp - annotation
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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.cpp Implementation of the cargo packets. */
#include "stdafx.h"
#include "core/pool_func.hpp"
#include "economy_base.h"
/* Initialize the cargopacket-pool */
CargoPacketPool _cargopacket_pool("CargoPacket");
INSTANTIATE_POOL_METHODS(CargoPacket)
/**
* Create a new packet for savegame loading.
*/
CargoPacket::CargoPacket()
{
this->source_type = ST_INDUSTRY;
this->source_id = INVALID_SOURCE;
}
/**
* Creates a new cargo packet.
* @param source Source station of the packet.
* @param source_xy Source location of the packet.
* @param count Number of cargo entities to put in this packet.
* @param source_type 'Type' of source the packet comes from (for subsidies).
* @param source_id Actual source of the packet (for subsidies).
* @pre count != 0
* @note We have to zero memory ourselves here because we are using a 'new'
* that, in contrary to all other pools, does not memset to 0.
*/
CargoPacket::CargoPacket(StationID source, TileIndex source_xy, uint16 count, SourceType source_type, SourceID source_id) :
feeder_share(0),
count(count),
days_in_transit(0),
source_id(source_id),
source(source),
source_xy(source_xy),
loaded_at_xy(0)
{
assert(count != 0);
this->source_type = source_type;
}
/**
* Creates a new cargo packet. Initializes the fields that cannot be changed later.
* Used when loading or splitting packets.
* @param count Number of cargo entities to put in this packet.
* @param days_in_transit Number of days the cargo has been in transit.
* @param source Station the cargo was initially loaded.
* @param source_xy Station location the cargo was initially loaded.
* @param loaded_at_xy Location the cargo was loaded last.
* @param feeder_share Feeder share the packet has already accumulated.
* @param source_type 'Type' of source the packet comes from (for subsidies).
* @param source_id Actual source of the packet (for subsidies).
* @note We have to zero memory ourselves here because we are using a 'new'
* that, in contrary to all other pools, does not memset to 0.
*/
CargoPacket::CargoPacket(uint16 count, byte days_in_transit, StationID source, TileIndex source_xy, TileIndex loaded_at_xy, Money feeder_share, SourceType source_type, SourceID source_id) :
feeder_share(feeder_share),
count(count),
days_in_transit(days_in_transit),
source_id(source_id),
source(source),
source_xy(source_xy),
loaded_at_xy(loaded_at_xy)
{
assert(count != 0);
this->source_type = source_type;
}
/**
* Split this packet in two and return the split off part.
* @param new_size Size of the remaining part.
* @return Split off part, or NULL if no packet could be allocated!
*/
FORCEINLINE CargoPacket *CargoPacket::Split(uint new_size)
{
if (!CargoPacket::CanAllocateItem()) return NULL;
Money fs = this->feeder_share * new_size / static_cast<uint>(this->count);
CargoPacket *cp_new = new CargoPacket(new_size, this->days_in_transit, this->source, this->source_xy, this->loaded_at_xy, fs, this->source_type, this->source_id);
this->feeder_share -= fs;
this->count -= new_size;
return cp_new;
}
/**
* Merge another packet into this one.
* @param cp Packet to be merged in.
*/
FORCEINLINE void CargoPacket::Merge(CargoPacket *cp)
{
this->count += cp->count;
this->feeder_share += cp->feeder_share;
delete cp;
}
/**
* Invalidates (sets source_id to INVALID_SOURCE) all cargo packets from given source.
* @param src_type Type of source.
* @param src Index of source.
*/
/* static */ void CargoPacket::InvalidateAllFrom(SourceType src_type, SourceID src)
{
CargoPacket *cp;
FOR_ALL_CARGOPACKETS(cp) {
if (cp->source_type == src_type && cp->source_id == src) cp->source_id = INVALID_SOURCE;
}
}
/**
* Invalidates (sets source to INVALID_STATION) all cargo packets from given station.
* @param sid Station that gets removed.
*/
/* static */ void CargoPacket::InvalidateAllFrom(StationID sid)
{
CargoPacket *cp;
FOR_ALL_CARGOPACKETS(cp) {
if (cp->source == sid) cp->source = INVALID_STATION;
}
}
/*
*
* Cargo list implementation
*
*/
/**
* Destroy the cargolist ("frees" all cargo packets).
*/
template <class Tinst>
CargoList<Tinst>::~CargoList()
{
for (Iterator it(this->packets.begin()); it != this->packets.end(); ++it) {
delete *it;
}
}
/**
* Empty the cargo list, but don't free the cargo packets;
* the cargo packets are cleaned by CargoPacket's CleanPool.
*/
template <class Tinst>
void CargoList<Tinst>::OnCleanPool()
{
this->packets.clear();
}
/**
* Update the cached values to reflect the removal of this packet.
* Decreases count and days_in_transit.
* @param cp Packet to be removed from cache.
*/
template <class Tinst>
void CargoList<Tinst>::RemoveFromCache(const CargoPacket *cp)
{
this->count -= cp->count;
this->cargo_days_in_transit -= cp->days_in_transit * cp->count;
}
/**
* Update the cache to reflect adding of this packet.
* Increases count and days_in_transit.
* @param cp New packet to be inserted.
*/
template <class Tinst>
void CargoList<Tinst>::AddToCache(const CargoPacket *cp)
{
this->count += cp->count;
this->cargo_days_in_transit += cp->days_in_transit * cp->count;
}
/**
* Appends the given cargo packet. Tries to merge it with another one in the
* packets list. If no fitting packet is found, appends it.
* @warning After appending this packet may not exist anymore!
* @note Do not use the cargo packet anymore after it has been appended to this CargoList!
* @param cp Cargo packet to add.
* @pre cp != NULL
*/
template <class Tinst>
void CargoList<Tinst>::Append(CargoPacket *cp)
{
assert(cp != NULL);
static_cast<Tinst *>(this)->AddToCache(cp);
for (List::reverse_iterator it(this->packets.rbegin()); it != this->packets.rend(); it++) {
CargoPacket *icp = *it;
if (Tinst::AreMergable(icp, cp) && icp->count + cp->count <= CargoPacket::MAX_COUNT) {
icp->Merge(cp);
return;
}
}
/* The packet could not be merged with another one */
this->packets.push_back(cp);
}
/**
* Truncates the cargo in this list to the given amount. It leaves the
* first count cargo entities and removes the rest.
* @param max_remaining Maximum amount of entities to be in the list after the command.
*/
template <class Tinst>
void CargoList<Tinst>::Truncate(uint max_remaining)
{
for (Iterator it(packets.begin()); it != packets.end(); /* done during loop*/) {
CargoPacket *cp = *it;
if (max_remaining == 0) {
/* Nothing should remain, just remove the packets. */
this->packets.erase(it++);
static_cast<Tinst *>(this)->RemoveFromCache(cp);
delete cp;
continue;
}
uint local_count = cp->count;
if (local_count > max_remaining) {
uint diff = local_count - max_remaining;
this->count -= diff;
this->cargo_days_in_transit -= cp->days_in_transit * diff;
cp->count = max_remaining;
max_remaining = 0;
} else {
max_remaining -= local_count;
}
++it;
}
}
/**
* Moves the given amount of cargo to another list.
* Depending on the value of mta the side effects of this function differ:
* - MTA_FINAL_DELIVERY: Destroys the packets that do not originate from a specific station.
* - MTA_CARGO_LOAD: Sets the loaded_at_xy value of the moved packets.
* - MTA_TRANSFER: Just move without side effects.
* - MTA_UNLOAD: Just move without side effects.
* @param dest Destination to move the cargo to.
* @param count Amount of cargo entities to move.
* @param mta How to handle the moving (side effects).
* @param data Depending on mta the data of this variable differs:
* - MTA_FINAL_DELIVERY - Station ID of packet's origin not to remove.
* - MTA_CARGO_LOAD - Station's tile index of load.
* - MTA_TRANSFER - Unused.
* - MTA_UNLOAD - Unused.
* @param payment The payment helper.
*
* @pre mta == MTA_FINAL_DELIVERY || dest != NULL
* @pre mta == MTA_UNLOAD || mta == MTA_CARGO_LOAD || payment != NULL
* @return True if there are still packets that might be moved from this cargo list.
*/
template <class Tinst>
template <class Tother_inst>
bool CargoList<Tinst>::MoveTo(Tother_inst *dest, uint max_move, MoveToAction mta, CargoPayment *payment, uint data)
{
assert(mta == MTA_FINAL_DELIVERY || dest != NULL);
assert(mta == MTA_UNLOAD || mta == MTA_CARGO_LOAD || payment != NULL);
Iterator it(this->packets.begin());
while (it != this->packets.end() && max_move > 0) {
CargoPacket *cp = *it;
if (cp->source == data && mta == MTA_FINAL_DELIVERY) {
/* Skip cargo that originated from this station. */
++it;
continue;
}
if (cp->count <= max_move) {
/* Can move the complete packet */
max_move -= cp->count;
this->packets.erase(it++);
static_cast<Tinst *>(this)->RemoveFromCache(cp);
switch (mta) {
case MTA_FINAL_DELIVERY:
payment->PayFinalDelivery(cp, cp->count);
delete cp;
continue; // of the loop
case MTA_CARGO_LOAD:
cp->loaded_at_xy = data;
break;
case MTA_TRANSFER:
cp->feeder_share += payment->PayTransfer(cp, cp->count);
break;
case MTA_UNLOAD:
break;
}
dest->Append(cp);
continue;
}
/* Can move only part of the packet */
if (mta == MTA_FINAL_DELIVERY) {
/* Final delivery doesn't need package splitting. */
payment->PayFinalDelivery(cp, max_move);
/* Remove the delivered data from the cache */
uint left = cp->count - max_move;
cp->count = max_move;
static_cast<Tinst *>(this)->RemoveFromCache(cp);
/* Final delivery payment pays the feeder share, so we have to
* reset that so it is not 'shown' twice for partial unloads. */
cp->feeder_share = 0;
cp->count = left;
} else {
/* But... the rest needs package splitting. */
CargoPacket *cp_new = cp->Split(max_move);
/* We could not allocate a CargoPacket? Is the map that full? */
if (cp_new == NULL) return false;
static_cast<Tinst *>(this)->RemoveFromCache(cp_new); // this reflects the changes in cp.
if (mta == MTA_TRANSFER) {
/* Add the feeder share before inserting in dest. */
cp_new->feeder_share += payment->PayTransfer(cp_new, max_move);
} else if (mta == MTA_CARGO_LOAD) {
cp_new->loaded_at_xy = data;
}
dest->Append(cp_new);
}
max_move = 0;
}
return it != packets.end();
}
/** Invalidates the cached data and rebuilds it. */
template <class Tinst>
void CargoList<Tinst>::InvalidateCache()
{
this->count = 0;
this->cargo_days_in_transit = 0;
for (ConstIterator it(this->packets.begin()); it != this->packets.end(); it++) {
static_cast<Tinst *>(this)->AddToCache(*it);
}
}
/**
* Update the cached values to reflect the removal of this packet.
* Decreases count, feeder share and days_in_transit.
* @param cp Packet to be removed from cache.
*/
void VehicleCargoList::RemoveFromCache(const CargoPacket *cp)
{
this->feeder_share -= cp->feeder_share;
this->Parent::RemoveFromCache(cp);
}
/**
* Update the cache to reflect adding of this packet.
* Increases count, feeder share and days_in_transit.
* @param cp New packet to be inserted.
*/
void VehicleCargoList::AddToCache(const CargoPacket *cp)
{
this->feeder_share += cp->feeder_share;
this->Parent::AddToCache(cp);
}
/**
* Ages the all cargo in this list.
*/
void VehicleCargoList::AgeCargo()
{
for (ConstIterator it(this->packets.begin()); it != this->packets.end(); it++) {
CargoPacket *cp = *it;
/* If we're at the maximum, then we can't increase no more. */
if (cp->days_in_transit == 0xFF) continue;
cp->days_in_transit++;
this->cargo_days_in_transit += cp->count;
}
}
/** Invalidates the cached data and rebuild it. */
void VehicleCargoList::InvalidateCache()
{
this->feeder_share = 0;
this->Parent::InvalidateCache();
}
/*
* We have to instantiate everything we want to be usable.
*/
template class CargoList<VehicleCargoList>;
template class CargoList<StationCargoList>;
/** Autoreplace Vehicle -> Vehicle 'transfer'. */
template bool CargoList<VehicleCargoList>::MoveTo(VehicleCargoList *, uint max_move, MoveToAction mta, CargoPayment *payment, uint data);
/** Cargo unloading at a station. */
template bool CargoList<VehicleCargoList>::MoveTo(StationCargoList *, uint max_move, MoveToAction mta, CargoPayment *payment, uint data);
/** Cargo loading at a station. */
template bool CargoList<StationCargoList>::MoveTo(VehicleCargoList *, uint max_move, MoveToAction mta, CargoPayment *payment, uint data);
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