summaryrefslogtreecommitdiff
path: root/src/cargopacket.cpp
blob: e9b3f50641477e0e26fcae1613f19ba8f9a70881 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
/* $Id$ */

/*
 * 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.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)

/**
 * Initialize, i.e. clean, the pool with cargo packets.
 */
void InitializeCargoPackets()
{
	_cargopacket_pool.CleanPool();
}

CargoPacket::CargoPacket(StationID source, uint16 count, SourceType source_type, SourceID source_id) :
	count(count),
	source_id(source_id),
	source(source)
{
	this->source_type = source_type;

	if (source != INVALID_STATION) {
		assert(count != 0);
		this->source_xy    = Station::Get(source)->xy;
		this->loaded_at_xy = this->source_xy;
	}
}

CargoPacket::CargoPacket(uint16 count, byte days_in_transit, 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)
{
	this->source_type = source_type;
}

/**
 * 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 the station that gets removed
 */
/* static */ void CargoPacket::InvalidateAllFrom(StationID sid)
{
	CargoPacket *cp;
	FOR_ALL_CARGOPACKETS(cp) {
		if (cp->source == sid) cp->source_id = INVALID_SOURCE;
	}
}

/*
 *
 * Cargo list implementation
 *
 */

template <class Tinst>
CargoList<Tinst>::~CargoList()
{
	while (!this->packets.empty()) {
		delete this->packets.front();
		this->packets.pop_front();
	}
}

template <class Tinst>
void CargoList<Tinst>::RemoveFromCache(const CargoPacket *cp)
{
	this->count                 -= cp->count;
	this->feeder_share          -= cp->feeder_share;
	this->cargo_days_in_transit -= cp->days_in_transit * cp->count;
}

template <class Tinst>
void CargoList<Tinst>::AddToCache(const CargoPacket *cp)
{
	this->count                 += cp->count;
	this->feeder_share          += cp->feeder_share;
	this->cargo_days_in_transit += cp->days_in_transit * cp->count;
}

void VehicleCargoList::AgeCargo()
{
	for (List::const_iterator it = this->packets.begin(); it != this->packets.end(); it++) {
		/* If we're at the maximum, then we can't increase no more. */
		if ((*it)->days_in_transit == 0xFF) continue;

		(*it)->days_in_transit++;
		this->cargo_days_in_transit += (*it)->count;
	}
}

template <class Tinst>
void CargoList<Tinst>::Append(CargoPacket *cp)
{
	assert(cp != NULL);

	for (List::iterator it = this->packets.begin(); it != this->packets.end(); it++) {
		CargoPacket *icp = *it;
		if (Tinst::AreMergable(icp, cp) && icp->count + cp->count <= CargoPacket::MAX_COUNT) {
			icp->count        += cp->count;
			icp->feeder_share += cp->feeder_share;

			this->AddToCache(cp);
			delete cp;
			return;
		}
	}

	/* The packet could not be merged with another one */
	this->packets.push_back(cp);
	this->AddToCache(cp);
}


template <class Tinst>
void CargoList<Tinst>::Truncate(uint max_remaining)
{
	for (List::iterator it = packets.begin(); it != packets.end(); /* done during loop*/) {
		CargoPacket *cp = *it;
		if (max_remaining == 0) {
			/* Nothing should remain, just remove the packets. */
			packets.erase(it++);
			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;
	}
}

template <class Tinst>
template <class Tother_inst>
bool CargoList<Tinst>::MoveTo(Tother_inst *dest, uint max_move, CargoList::MoveToAction mta, CargoPayment *payment, uint data)
{
	assert(mta == MTA_FINAL_DELIVERY || dest != NULL);
	assert(mta == MTA_UNLOAD || mta == MTA_CARGO_LOAD || payment != NULL);

	List::iterator it = packets.begin();
	while (it != 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++);
			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);
			this->count -= max_move;
			this->cargo_days_in_transit -= max_move * cp->days_in_transit;

			/* Final delivery payment pays the feeder share, so we have to
			 * reset that so it is not 'shown' twice for partial unloads. */
			this->feeder_share -= cp->feeder_share;
			cp->feeder_share = 0;
		} else {
			/* But... the rest needs package splitting. */
			Money fs = cp->feeder_share * max_move / static_cast<uint>(cp->count);
			cp->feeder_share -= fs;

			CargoPacket *cp_new = new CargoPacket(max_move, cp->days_in_transit, fs, cp->source_type, cp->source_id);

			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;

			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);
			}

			dest->Append(cp_new);
		}
		cp->count -= max_move;

		max_move = 0;
	}

	return it != packets.end();
}

template <class Tinst>
void CargoList<Tinst>::InvalidateCache()
{
	this->count = 0;
	this->feeder_share = 0;
	this->cargo_days_in_transit = 0;

	for (List::const_iterator it = this->packets.begin(); it != this->packets.end(); it++) {
		this->AddToCache(*it);
	}
}

/*
 * 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);