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/* $Id$ */
/** @file cargopacket.cpp Implementation of the cargo packets */
#include "stdafx.h"
#include "core/pool_func.hpp"
#include "economy_base.h"
#include "station_base.h"
/* Initialize the cargopacket-pool */
CargoPacketPool _cargopacket_pool("CargoPacket");
INSTANTIATE_POOL_METHODS(CargoPacket)
void InitializeCargoPackets()
{
_cargopacket_pool.CleanPool();
}
CargoPacket::CargoPacket(StationID source, uint16 count)
{
if (source != INVALID_STATION) assert(count != 0);
this->source = source;
this->source_xy = (source != INVALID_STATION) ? Station::Get(source)->xy : 0;
this->loaded_at_xy = this->source_xy;
this->count = count;
this->days_in_transit = 0;
this->feeder_share = 0;
}
/*
*
* Cargo list implementation
*
*/
CargoList::~CargoList()
{
while (!packets.empty()) {
delete packets.front();
packets.pop_front();
}
}
void CargoList::AgeCargo()
{
if (empty) return;
uint dit = 0;
for (List::const_iterator it = packets.begin(); it != packets.end(); it++) {
if ((*it)->days_in_transit != 0xFF) (*it)->days_in_transit++;
dit += (*it)->days_in_transit * (*it)->count;
}
days_in_transit = dit / count;
}
void CargoList::Append(CargoPacket *cp)
{
assert(cp != NULL);
for (List::iterator it = packets.begin(); it != packets.end(); it++) {
if ((*it)->SameSource(cp) && (*it)->count + cp->count <= 65535) {
(*it)->count += cp->count;
(*it)->feeder_share += cp->feeder_share;
delete cp;
InvalidateCache();
return;
}
}
/* The packet could not be merged with another one */
packets.push_back(cp);
InvalidateCache();
}
void CargoList::Truncate(uint count)
{
for (List::iterator it = packets.begin(); it != packets.end(); it++) {
uint local_count = (*it)->count;
if (local_count <= count) {
count -= local_count;
continue;
}
(*it)->count = count;
count = 0;
}
while (!packets.empty()) {
CargoPacket *cp = packets.back();
if (cp->count != 0) break;
delete cp;
packets.pop_back();
}
InvalidateCache();
}
bool CargoList::MoveTo(CargoList *dest, uint count, CargoList::MoveToAction mta, CargoPayment *payment, uint data)
{
assert(mta == MTA_FINAL_DELIVERY || dest != NULL);
assert(mta == MTA_UNLOAD || mta == MTA_CARGO_LOAD || payment != NULL);
CargoList tmp;
while (!packets.empty() && count > 0) {
CargoPacket *cp = *packets.begin();
if (cp->count <= count) {
/* Can move the complete packet */
packets.remove(cp);
switch (mta) {
case MTA_FINAL_DELIVERY:
if (cp->source == data) {
tmp.Append(cp);
} else {
payment->PayFinalDelivery(cp, cp->count);
count -= cp->count;
delete cp;
}
continue; // of the loop
case MTA_CARGO_LOAD:
cp->loaded_at_xy = data;
break;
case MTA_TRANSFER:
payment->PayTransfer(cp, cp->count);
break;
case MTA_UNLOAD:
break;
}
count -= cp->count;
dest->packets.push_back(cp);
} else {
/* Can move only part of the packet, so split it into two pieces */
if (mta != MTA_FINAL_DELIVERY) {
CargoPacket *cp_new = new CargoPacket();
Money fs = cp->feeder_share * count / static_cast<uint>(cp->count);
cp->feeder_share -= fs;
cp_new->source = cp->source;
cp_new->source_xy = cp->source_xy;
cp_new->loaded_at_xy = (mta == MTA_CARGO_LOAD) ? data : cp->loaded_at_xy;
cp_new->days_in_transit = cp->days_in_transit;
cp_new->feeder_share = fs;
cp_new->count = count;
dest->packets.push_back(cp_new);
if (mta == MTA_TRANSFER) payment->PayTransfer(cp_new, count);
} else {
payment->PayFinalDelivery(cp, count);
}
cp->count -= count;
count = 0;
}
}
bool remaining = !packets.empty();
if (mta == MTA_FINAL_DELIVERY && !tmp.Empty()) {
/* There are some packets that could not be delivered at the station, put them back */
tmp.MoveTo(this, UINT_MAX, MTA_UNLOAD, NULL);
tmp.packets.clear();
}
if (dest != NULL) dest->InvalidateCache();
InvalidateCache();
return remaining;
}
void CargoList::InvalidateCache()
{
empty = packets.empty();
count = 0;
feeder_share = 0;
source = INVALID_STATION;
days_in_transit = 0;
if (empty) return;
uint dit = 0;
for (List::const_iterator it = packets.begin(); it != packets.end(); it++) {
count += (*it)->count;
dit += (*it)->days_in_transit * (*it)->count;
feeder_share += (*it)->feeder_share;
}
days_in_transit = dit / count;
source = (*packets.begin())->source;
}
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