summaryrefslogtreecommitdiff
path: root/src/cargopacket.cpp
blob: 897812b1195a76c7bd2bf8999fc3c161f6f08bd2 (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
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
/* $Id$ */

/** @file cargopacket.cpp Implementation of the cargo packets */

#include "stdafx.h"
#include "openttd.h"
#include "station.h"
#include "cargopacket.h"
#include "saveload.h"

/**
 * Called if a new block is added to the station-pool
 */
static void CargoPacketPoolNewBlock(uint cpart_item)
{
	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.
	 *  TODO - This is just a temporary stage, this will be removed. */
	for (CargoPacket *cp = GetCargoPacket(cpart_item); cp != NULL; cp = (cp->index + 1U < GetCargoPacketPoolSize()) ? GetCargoPacket(cp->index + 1U) : NULL) cp->index = cpart_item++;
}

static void CargoPacketPoolCleanBlock(uint cpart_item, uint end_item)
{
	for (uint i = cpart_item; i <= end_item; i++) {
		CargoPacket *cp = GetCargoPacket(i);
		if (cp->IsValid()) cp->~CargoPacket();
	}
}

/* Initialize the cargopacket-pool */
DEFINE_OLD_POOL(CargoPacket, CargoPacket, CargoPacketPoolNewBlock, CargoPacketPoolCleanBlock)

void InitializeCargoPackets()
{
	/* Clean the cargo packet pool and create 1 block in it */
	CleanPool(&_CargoPacket_pool);
	AddBlockToPool(&_CargoPacket_pool);

	/* Check whether our &cargolist == &cargolist.packets "hack" works */
	CargoList::AssertOnWrongPacketOffset();
}

CargoPacket::CargoPacket(StationID source, uint16 count)
{
	if (source != INVALID_STATION) assert(count != 0);

	this->source          = source;
	this->source_xy       = (source != INVALID_STATION) ? GetStation(source)->xy : 0;
	this->loaded_at_xy    = this->source_xy;

	this->count           = count;
	this->days_in_transit = 0;
	this->feeder_share    = 0;
	this->paid_for        = false;
}

CargoPacket::~CargoPacket()
{
	this->count = 0;
}

bool CargoPacket::SameSource(CargoPacket *cp)
{
	return this->source_xy == cp->source_xy && this->days_in_transit == cp->days_in_transit && this->paid_for == cp->paid_for;
}

void *CargoPacket::operator new(size_t size)
{
	CargoPacket *cp = AllocateRaw();
	return cp;
}

void *CargoPacket::operator new(size_t size, CargoPacket::ID cp_idx)
{
	if (!AddBlockIfNeeded(&_CargoPacket_pool, cp_idx))
		error("CargoPackets: failed loading savegame: too many cargo packets");

	CargoPacket *cp = GetCargoPacket(cp_idx);
	return cp;
}

void CargoPacket::operator delete(void *p)
{
}

void CargoPacket::operator delete(void *p, CargoPacket::ID cp_idx)
{
}

/*static*/ CargoPacket *CargoPacket::AllocateRaw()
{
	CargoPacket *cp = NULL;

	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.
	 * TODO - This is just a temporary stage, this will be removed. */
	for (cp = GetCargoPacket(0); cp != NULL; cp = (cp->index + 1U < GetCargoPacketPoolSize()) ? GetCargoPacket(cp->index + 1U) : NULL) {
		if (!cp->IsValid()) {
			CargoPacket::ID index = cp->index;

			memset(cp, 0, sizeof(CargoPacket));
			cp->index = index;
			return cp;
		}
	}

	/* Check if we can add a block to the pool */
	if (AddBlockToPool(&_CargoPacket_pool)) return AllocateRaw();

	error("CargoPackets: too many cargo packets");
}

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_VAR(CargoPacket, paid_for,        SLE_BOOL),

	SLE_END()
};

static void Save_CAPA()
{
	CargoPacket *cp;

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

static void Load_CAPA()
{
	int index;

	while ((index = SlIterateArray()) != -1) {
		if (!AddBlockIfNeeded(&_CargoPacket_pool, index)) {
			error("CargoPackets: failed loading savegame: too many cargo packets");
		}

		CargoPacket *cp = GetCargoPacket(index);
		SlObject(cp, _cargopacket_desc);
	}
}

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

/*
 *
 * Cargo list implementation
 *
 */

/* static */ void CargoList::AssertOnWrongPacketOffset()
{
	CargoList cl;
	if ((void*)&cl != (void*)cl.Packets()) NOT_REACHED();
}


CargoList::~CargoList()
{
	while (!packets.empty()) {
		delete packets.front();
		packets.pop_front();
	}
}

const CargoList::List *CargoList::Packets() const
{
	return &packets;
}

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;
}

bool CargoList::Empty() const
{
	return empty;
}

uint CargoList::Count() const
{
	return count;
}

bool CargoList::UnpaidCargo() const
{
	return unpaid_cargo;
}

Money CargoList::FeederShare() const
{
	return feeder_share;
}

StationID CargoList::Source() const
{
	return source;
}

uint CargoList::DaysInTransit() const
{
	return days_in_transit;
}

void CargoList::Append(CargoPacket *cp)
{
	assert(cp != NULL);
	assert(cp->IsValid());

	for (List::iterator it = packets.begin(); it != packets.end(); it++) {
		if ((*it)->SameSource(cp)) {
			(*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, uint data)
{
	assert(mta == MTA_FINAL_DELIVERY || dest != 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 {
						count -= cp->count;
						delete cp;
					}
					break;
				case MTA_CARGO_LOAD:
					cp->loaded_at_xy = data;
					/* When cargo is moved into another vehicle you have *always* paid for it */
					cp->paid_for     = false;
					/* FALL THROUGH */
				case MTA_OTHER:
					count -= cp->count;
					dest->packets.push_back(cp);
					break;
			}
		} else {
			/* Can move only part of the packet, so split it into two pieces */
			if (mta != MTA_FINAL_DELIVERY) {
				CargoPacket *cp_new = new CargoPacket();
				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    = cp->feeder_share / count;
				/* When cargo is moved into another vehicle you have *always* paid for it */
				cp_new->paid_for        = (mta == MTA_CARGO_LOAD) ? false : cp->paid_for;

				cp_new->count = count;
				dest->packets.push_back(cp_new);

				cp->feeder_share /= cp->count - 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, MAX_UVALUE(uint));
		tmp.packets.clear();
	}

	if (dest != NULL) dest->InvalidateCache();
	InvalidateCache();

	return remaining;
}

void CargoList::InvalidateCache()
{
	empty = packets.empty();
	count = 0;
	unpaid_cargo = false;
	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;
		unpaid_cargo |= !(*it)->paid_for;
		dit          += (*it)->days_in_transit * (*it)->count;
		feeder_share += (*it)->feeder_share;
	}
	days_in_transit = dit / count;
	source = (*packets.begin())->source;
}