summaryrefslogtreecommitdiff
path: root/src/saveload/oldloader_sl.cpp
blob: 7f1722e0f0fafef65207be37525e6c7edef9f86f (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
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
/* $Id$ */

/*
 * 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 oldloader_sl.cpp Chunks and fix-ups for TTO/TTD/TTDP savegames. TTO loader code is based on SVXConverter by Roman Vetter. */

#include "../stdafx.h"
#include "../town.h"
#include "../industry.h"
#include "../company_func.h"
#include "../aircraft.h"
#include "../roadveh.h"
#include "../ship.h"
#include "../train.h"
#include "../signs_base.h"
#include "../station_base.h"
#include "../subsidy_base.h"
#include "../debug.h"
#include "../depot_base.h"
#include "../date_func.h"
#include "../vehicle_func.h"
#include "../effectvehicle_base.h"
#include "../engine_func.h"
#include "../company_base.h"
#include "saveload_internal.h"
#include "oldloader.h"

#include "table/strings.h"
#include "../table/engines.h"
#include "../table/townname.h"

static bool _read_ttdpatch_flags;    ///< Have we (tried to) read TTDPatch extra flags?
static uint16 _old_extra_chunk_nums; ///< Number of extra TTDPatch chunks
static byte _old_vehicle_multiplier; ///< TTDPatch vehicle multiplier

static uint8 *_old_map3;

void FixOldMapArray()
{
	/* TTO/TTD/TTDP savegames could have buoys at tile 0
	 * (without assigned station struct) */
	MemSetT(&_m[0], 0);
	SetTileType(0, MP_WATER);
	SetTileOwner(0, OWNER_WATER);
}

static void FixTTDMapArray()
{
	/* _old_map3 is moved to _m::m3 and _m::m4 */
	for (TileIndex t = 0; t < OLD_MAP_SIZE; t++) {
		_m[t].m3 = _old_map3[t * 2];
		_m[t].m4 = _old_map3[t * 2 + 1];
	}

	for (TileIndex t = 0; t < OLD_MAP_SIZE; t++) {
		switch (GetTileType(t)) {
			case MP_STATION:
				_m[t].m4 = 0; // We do not understand this TTDP station mapping (yet)
				switch (_m[t].m5) {
					/* We have drive through stops at a totally different place */
					case 0x53: case 0x54: _m[t].m5 += 170 - 0x53; break; // Bus drive through
					case 0x57: case 0x58: _m[t].m5 += 168 - 0x57; break; // Truck drive through
					case 0x55: case 0x56: _m[t].m5 += 170 - 0x55; break; // Bus tram stop
					case 0x59: case 0x5A: _m[t].m5 += 168 - 0x59; break; // Truck tram stop
					default: break;
				}
				break;

			case MP_RAILWAY:
				/* We save presignals different from TTDPatch, convert them */
				if (GB(_m[t].m5, 6, 2) == 1) { // RAIL_TILE_SIGNALS
					/* This byte is always zero in TTD for this type of tile */
					if (_m[t].m4) { // Convert the presignals to our own format
						_m[t].m4 = (_m[t].m4 >> 1) & 7;
					}
				}
				/* TTDPatch stores PBS things in L6 and all elsewhere; so we'll just
				 * clear it for ourselves and let OTTD's rebuild PBS itself */
				_m[t].m4 &= 0xF; // Only keep the lower four bits; upper four is PBS
				break;

			case MP_WATER:
				/* if water class == 3, make river there */
				if (GB(_m[t].m3, 0, 2) == 3) {
					SetTileType(t, MP_WATER);
					SetTileOwner(t, OWNER_WATER);
					_m[t].m2 = 0;
					_m[t].m3 = 2; // WATER_CLASS_RIVER
					_m[t].m4 = Random();
					_m[t].m5 = 0;
				}
				break;

			default:
				break;
		}
	}

	FixOldMapArray();
}

static void FixTTDDepots()
{
	const Depot *d;
	FOR_ALL_DEPOTS_FROM(d, 252) {
		if (!IsDepotTile(d->xy) || GetDepotIndex(d->xy) != d->index) {
			/** Workaround for SVXConverter bug, depots 252-255 could be invalid */
			delete d;
		}
	}
}

#define FIXNUM(x, y, z) (((((x) << 16) / (y)) + 1) << z)

static uint32 RemapOldTownName(uint32 townnameparts, byte old_town_name_type)
{
	switch (old_town_name_type) {
		case 0: case 3: // English, American
			/* Already OK */
			return townnameparts;

		case 1: // French
			/* For some reason 86 needs to be subtracted from townnameparts
			 * 0000 0000 0000 0000 0000 0000 1111 1111 */
			return FIXNUM(townnameparts - 86, lengthof(_name_french_real), 0);

		case 2: // German
			DEBUG(misc, 0, "German Townnames are buggy (%d)", townnameparts);
			return townnameparts;

		case 4: // Latin-American
			/* 0000 0000 0000 0000 0000 0000 1111 1111 */
			return FIXNUM(townnameparts, lengthof(_name_spanish_real), 0);

		case 5: // Silly
			/* NUM_SILLY_1 - lower 16 bits
			 * NUM_SILLY_2 - upper 16 bits without leading 1 (first 8 bytes)
			 * 1000 0000 2222 2222 0000 0000 1111 1111 */
			return FIXNUM(townnameparts, lengthof(_name_silly_1), 0) | FIXNUM(GB(townnameparts, 16, 8), lengthof(_name_silly_2), 16);
	}
	return 0;
}

#undef FIXNUM

static void FixOldTowns()
{
	Town *town;

	/* Convert town-names if needed */
	FOR_ALL_TOWNS(town) {
		if (IsInsideMM(town->townnametype, 0x20C1, 0x20C3)) {
			town->townnametype = SPECSTR_TOWNNAME_ENGLISH + _settings_game.game_creation.town_name;
			town->townnameparts = RemapOldTownName(town->townnameparts, _settings_game.game_creation.town_name);
		}
	}
}

static StringID *_old_vehicle_names;

/**
 * Convert the old style vehicles into something that resembles
 * the old new style savegames. Then #AfterLoadGame can handle
 * the rest of the conversion.
 */
void FixOldVehicles()
{
	Vehicle *v;

	FOR_ALL_VEHICLES(v) {
		if ((size_t)v->next == 0xFFFF) {
			v->next = NULL;
		} else {
			v->next = Vehicle::GetIfValid((size_t)v->next);
		}

		/* For some reason we need to correct for this */
		switch (v->spritenum) {
			case 0xfd: break;
			case 0xff: v->spritenum = 0xfe; break;
			default:   v->spritenum >>= 1; break;
		}

		/* Vehicle-subtype is different in TTD(Patch) */
		if (v->type == VEH_EFFECT) v->subtype = v->subtype >> 1;

		v->name = CopyFromOldName(_old_vehicle_names[v->index]);

		/* We haven't used this bit for stations for ages */
		if (v->type == VEH_ROAD) {
			RoadVehicle *rv = RoadVehicle::From(v);
			if (rv->state != RVSB_IN_DEPOT && rv->state != RVSB_WORMHOLE) {
				ClrBit(rv->state, 2);
				if (IsTileType(rv->tile, MP_STATION) && _m[rv->tile].m5 >= 168) {
					/* Update the vehicle's road state to show we're in a drive through road stop. */
					SetBit(rv->state, RVS_IN_DT_ROAD_STOP);
				}
			}
		}

		/* The subtype should be 0, but it sometimes isn't :( */
		if (v->type == VEH_ROAD || v->type == VEH_SHIP) v->subtype = 0;

		/* Sometimes primary vehicles would have a nothing (invalid) order
		 * or vehicles that could not have an order would still have a
		 * (loading) order which causes assertions and the like later on.
		 */
		if (!IsCompanyBuildableVehicleType(v) ||
				(v->IsPrimaryVehicle() && v->current_order.IsType(OT_NOTHING))) {
			v->current_order.MakeDummy();
		}

		/* Shared orders are fixed in AfterLoadVehicles now */
	}
}

static bool FixTTOMapArray()
{
	for (TileIndex t = 0; t < OLD_MAP_SIZE; t++) {
		TileType tt = GetTileType(t);
		if (tt == 11) {
			/* TTO has a different way of storing monorail.
			 * Instead of using bits in m3 it uses a different tile type. */
			_m[t].m3 = 1; // rail type = monorail (in TTD)
			SetTileType(t, MP_RAILWAY);
			_m[t].m2 = 1; // set monorail ground to RAIL_GROUND_GRASS
			tt = MP_RAILWAY;
		}

		switch (tt) {
			case MP_CLEAR:
				break;

			case MP_RAILWAY:
				switch (GB(_m[t].m5, 6, 2)) {
					case 0: // RAIL_TILE_NORMAL
						break;
					case 1: // RAIL_TILE_SIGNALS
						_m[t].m4 = (~_m[t].m5 & 1) << 2;        // signal variant (present only in OTTD)
						SB(_m[t].m2, 6, 2, GB(_m[t].m5, 3, 2)); // signal status
						_m[t].m3 |= 0xC0;                       // both signals are present
						_m[t].m5 = HasBit(_m[t].m5, 5) ? 2 : 1; // track direction (only X or Y)
						_m[t].m5 |= 0x40;                       // RAIL_TILE_SIGNALS
						break;
					case 3: // RAIL_TILE_DEPOT
						_m[t].m2 = 0;
						break;
					default:
						return false;
				}
				break;

			case MP_ROAD: // road (depot) or level crossing
				switch (GB(_m[t].m5, 4, 4)) {
					case 0: // ROAD_TILE_NORMAL
						if (_m[t].m2 == 4) _m[t].m2 = 5; // 'small trees' -> ROADSIDE_TREES
						break;
					case 1: // ROAD_TILE_CROSSING (there aren't monorail crossings in TTO)
						_m[t].m3 = _m[t].m1; // set owner of road = owner of rail
						break;
					case 2: // ROAD_TILE_DEPOT
						break;
					default:
						return false;
				}
				break;

			case MP_HOUSE:
				_m[t].m3 = _m[t].m2 & 0xC0;    // construction stage
				_m[t].m2 &= 0x3F;              // building type
				if (_m[t].m2 >= 5) _m[t].m2++; // skip "large office block on snow"
				break;

			case MP_TREES:
				_m[t].m3 = GB(_m[t].m5, 3, 3); // type of trees
				_m[t].m5 &= 0xC7;              // number of trees and growth status
				break;

			case MP_STATION:
				_m[t].m3 = (_m[t].m5 >= 0x08 && _m[t].m5 <= 0x0F) ? 1 : 0; // monorail -> 1, others 0 (rail, road, airport, dock)
				if (_m[t].m5 >= 8) _m[t].m5 -= 8; // shift for monorail
				if (_m[t].m5 >= 0x42) _m[t].m5++; // skip heliport
				break;

			case MP_WATER:
				_m[t].m3 = _m[t].m2 = 0;
				break;

			case MP_VOID:
				_m[t].m2 = _m[t].m3 = _m[t].m5 = 0;
				break;

			case MP_INDUSTRY:
				_m[t].m3 = 0;
				switch (_m[t].m5) {
					case 0x24: // farm silo
						_m[t].m5 = 0x25;
						break;
					case 0x25: case 0x27: // farm
					case 0x28: case 0x29: case 0x2A: case 0x2B: // factory
						_m[t].m5--;
						break;
					default:
						if (_m[t].m5 >= 0x2C) _m[t].m5 += 3; // iron ore mine, steel mill or bank
						break;
				}
				break;

			case MP_TUNNELBRIDGE:
				if (HasBit(_m[t].m5, 7)) { // bridge
					byte m5 = _m[t].m5;
					_m[t].m5 = m5 & 0xE1; // copy bits 7..5, 1
					if (GB(m5, 1, 2) == 1) _m[t].m5 |= 0x02; // road bridge
					if (GB(m5, 1, 2) == 3) _m[t].m2 |= 0xA0; // monorail bridge -> tubular, steel bridge
					if (!HasBit(m5, 6)) { // bridge head
						_m[t].m3 = (GB(m5, 1, 2) == 3) ? 1 : 0; // track subtype (1 for monorail, 0 for others)
					} else { // middle bridge part
						_m[t].m3 = HasBit(m5, 2) ? 0x10 : 0;  // track subtype on bridge
						if (GB(m5, 3, 2) == 3) _m[t].m3 |= 1; // track subtype under bridge
						if (GB(m5, 3, 2) == 1) _m[t].m5 |= 0x08; // set for road/water under (0 for rail/clear)
					}
				} else { // tunnel entrance/exit
					_m[t].m2 = 0;
					_m[t].m3 = HasBit(_m[t].m5, 3); // monorail
					_m[t].m5 &= HasBit(_m[t].m5, 3) ? 0x03 : 0x07 ; // direction, transport type (== 0 for rail)
				}
				break;

			case MP_OBJECT:
				_m[t].m2 = 0;
				_m[t].m3 = 0;
				break;

			default:
				return false;

		}
	}

	FixOldMapArray();

	return true;
}

static Engine *_old_engines;

static bool FixTTOEngines()
{
	/** TTD->TTO remapping of engines; 255 means there is no equivalent. SVXConverter uses (almost) the same table. */
	static const EngineID ttd_to_tto[] = {
		  0, 255, 255, 255, 255, 255, 255, 255,   5,   7,   8,   9,  10,  11,  12,  13,
		255, 255, 255, 255, 255, 255,  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,
		25,   26,  27,  29,  28,  30, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
		255, 255, 255, 255, 255, 255, 255,  31, 255,  32,  33,  34,  35,  36,  37,  38,
		 39,  40,  41,  42, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
		255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
		255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
		255, 255, 255, 255,  44,  45,  46, 255, 255, 255, 255,  47,  48, 255,  49,  50,
		255, 255, 255, 255,  51,  52, 255,  53,  54, 255,  55,  56, 255,  57,  59, 255,
		 58,  60, 255,  61,  62, 255,  63,  64, 255,  65,  66, 255, 255, 255, 255, 255,
		255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
		255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
		255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,  67,  68,  69,  70,
		 71, 255, 255,  76,  77, 255, 255,  78,  79,  80,  81,  82,  83,  84,  85,  86,
		 87,  88,  89,  90,  91,  92,  93,  94,  95,  96,  97,  98,  99, 100, 101, 255,
		255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 102, 255, 255
	};

	/** TTO->TTD remapping of engines. SVXConverter uses the same table. */
	static const EngineID tto_to_ttd[] = {
		  0,   0,   8,   8,   8,   8,   8,   9,  10,  11,  12,  13,  14,  15,  15,  22,
		 23,  24,  25,  26,  27,  29,  28,  30,  31,  32,  33,  34,  35,  36,  37,  55,
		 57,  59,  58,  60,  61,  62,  63,  64,  65,  66,  67, 116, 116, 117, 118, 123,
		124, 126, 127, 132, 133, 135, 136, 138, 139, 141, 142, 144, 145, 147, 148, 150,
		151, 153, 154, 204, 205, 206, 207, 208, 211, 212, 211, 212, 211, 212, 215, 216,
		217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232,
		233, 234, 235, 236, 237, 238, 253
	};

	Vehicle *v;
	FOR_ALL_VEHICLES(v) {
		if (v->engine_type >= lengthof(tto_to_ttd)) return false;
		v->engine_type = tto_to_ttd[v->engine_type];
	}

	/* Load the default engine set. Many of them will be overridden later */
	uint j = 0;
	for (uint i = 0; i < lengthof(_orig_rail_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_TRAIN, i);
	for (uint i = 0; i < lengthof(_orig_road_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_ROAD, i);
	for (uint i = 0; i < lengthof(_orig_ship_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_SHIP, i);
	for (uint i = 0; i < lengthof(_orig_aircraft_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_AIRCRAFT, i);

	Date aging_date = min(_date + DAYS_TILL_ORIGINAL_BASE_YEAR, ConvertYMDToDate(2050, 0, 1));

	for (EngineID i = 0; i < 256; i++) {
		int oi = ttd_to_tto[i];
		Engine *e = GetTempDataEngine(i);

		if (oi == 255) {
			/* Default engine is used */
			_date += DAYS_TILL_ORIGINAL_BASE_YEAR;
			StartupOneEngine(e, aging_date);
			e->intro_date -= DAYS_TILL_ORIGINAL_BASE_YEAR;
			_date -= DAYS_TILL_ORIGINAL_BASE_YEAR;

			/* Make sure for example monorail and maglev are available when they should be */
			if (_date >= e->intro_date && HasBit(e->info.climates, 0)) {
				e->flags |= ENGINE_AVAILABLE;
				e->company_avail = (CompanyMask)0xFF;
				e->age = _date > e->intro_date ? (_date - e->intro_date) / 30 : 0;
			}
		} else {
			/* Using data from TTO savegame */
			Engine *oe = &_old_engines[oi];

			e->intro_date          = oe->intro_date;
			e->age                 = oe->age;
			e->reliability         = oe->reliability;
			e->reliability_spd_dec = oe->reliability_spd_dec;
			e->reliability_start   = oe->reliability_start;
			e->reliability_max     = oe->reliability_max;
			e->reliability_final   = oe->reliability_final;
			e->duration_phase_1    = oe->duration_phase_1;
			e->duration_phase_2    = oe->duration_phase_2;
			e->duration_phase_3    = oe->duration_phase_3;
			e->flags               = oe->flags;

			e->company_avail = 0;

			/* One or more engines were remapped to this one. Make this engine available
			 * if at least one of them was available. */
			for (uint j = 0; j < lengthof(tto_to_ttd); j++) {
				if (tto_to_ttd[j] == i && _old_engines[j].company_avail != 0) {
					e->company_avail = (CompanyMask)0xFF;
					e->flags |= ENGINE_AVAILABLE;
					break;
				}
			}

			e->info.climates = 1;
		}

		e->preview_company_rank = 0;
		e->preview_wait = 0;
		e->name = NULL;
	}

	return true;
}

static void FixTTOCompanies()
{
	Company *c;
	FOR_ALL_COMPANIES(c) {
		c->cur_economy.company_value = CalculateCompanyValue(c); // company value history is zeroed
	}
}

static inline byte RemapTTOColour(byte tto)
{
	/** Lossy remapping of TTO colours to TTD colours. SVXConverter uses the same conversion. */
	static const byte tto_colour_remap[] = {
		COLOUR_DARK_BLUE,  COLOUR_GREY,       COLOUR_YELLOW,     COLOUR_RED,
		COLOUR_PURPLE,     COLOUR_DARK_GREEN, COLOUR_ORANGE,     COLOUR_PALE_GREEN,
		COLOUR_BLUE,       COLOUR_GREEN,      COLOUR_CREAM,      COLOUR_BROWN,
		COLOUR_WHITE,      COLOUR_LIGHT_BLUE, COLOUR_MAUVE,      COLOUR_PINK
	};

	if ((size_t)tto >= lengthof(tto_colour_remap)) return COLOUR_GREY; // this shouldn't happen

	return tto_colour_remap[tto];
}

static inline uint RemapTownIndex(uint x)
{
	return _savegame_type == SGT_TTO ? (x - 0x264) / 78 : (x - 0x264) / 94;
}

static inline uint RemapOrderIndex(uint x)
{
	return _savegame_type == SGT_TTO ? (x - 0x1AC4) / 2 : (x - 0x1C18) / 2;
}

extern TileIndex *_animated_tile_list;
extern uint _animated_tile_count;
extern char *_old_name_array;

static uint32 _old_town_index;
static uint16 _old_string_id;
static uint16 _old_string_id_2;

static void ReadTTDPatchFlags()
{
	if (_read_ttdpatch_flags) return;

	_read_ttdpatch_flags = true;

	/* Set default values */
	_old_vehicle_multiplier = 1;
	_ttdp_version = 0;
	_old_extra_chunk_nums = 0;
	_bump_assert_value = 0;

	if (_savegame_type == SGT_TTO) return;

	/* TTDPatch misuses _old_map3 for flags.. read them! */
	_old_vehicle_multiplier = _old_map3[0];
	/* Somehow.... there was an error in some savegames, so 0 becomes 1
	 * and 1 becomes 2. The rest of the values are okay */
	if (_old_vehicle_multiplier < 2) _old_vehicle_multiplier++;

	_old_vehicle_names = MallocT<StringID>(_old_vehicle_multiplier * 850);

	/* TTDPatch increases the Vehicle-part in the middle of the game,
	 * so if the multiplier is anything else but 1, the assert fails..
	 * bump the assert value so it doesn't!
	 * (1 multiplier == 850 vehicles
	 * 1 vehicle   == 128 bytes */
	_bump_assert_value = (_old_vehicle_multiplier - 1) * 850 * 128;

	for (uint i = 0; i < 17; i++) { // check tile 0, too
		if (_old_map3[i] != 0) _savegame_type = SGT_TTDP1;
	}

	/* Check if we have a modern TTDPatch savegame (has extra data all around) */
	if (memcmp(&_old_map3[0x1FFFA], "TTDp", 4) == 0) _savegame_type = SGT_TTDP2;

	_old_extra_chunk_nums = _old_map3[_savegame_type == SGT_TTDP2 ? 0x1FFFE : 0x2];

	/* Clean the misused places */
	for (uint i = 0;       i < 17;      i++) _old_map3[i] = 0;
	for (uint i = 0x1FE00; i < 0x20000; i++) _old_map3[i] = 0;

	if (_savegame_type == SGT_TTDP2) DEBUG(oldloader, 2, "Found TTDPatch game");

	DEBUG(oldloader, 3, "Vehicle-multiplier is set to %d (%d vehicles)", _old_vehicle_multiplier, _old_vehicle_multiplier * 850);
}

static const OldChunks town_chunk[] = {
	OCL_SVAR(   OC_TILE, Town, xy ),
	OCL_NULL( 2 ),         ///< population,        no longer in use
	OCL_SVAR( OC_UINT16, Town, townnametype ),
	OCL_SVAR( OC_UINT32, Town, townnameparts ),
	OCL_SVAR(  OC_FILE_U8 | OC_VAR_U16, Town, grow_counter ),
	OCL_NULL( 1 ),         ///< sort_index,        no longer in use
	OCL_NULL( 4 ),         ///< sign-coordinates,  no longer in use
	OCL_NULL( 2 ),         ///< namewidth,         no longer in use
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, Town, flags ),
	OCL_NULL( 10 ),        ///< radius,            no longer in use

	OCL_SVAR( OC_INT16, Town, ratings[0] ),
	OCL_SVAR( OC_INT16, Town, ratings[1] ),
	OCL_SVAR( OC_INT16, Town, ratings[2] ),
	OCL_SVAR( OC_INT16, Town, ratings[3] ),
	OCL_SVAR( OC_INT16, Town, ratings[4] ),
	OCL_SVAR( OC_INT16, Town, ratings[5] ),
	OCL_SVAR( OC_INT16, Town, ratings[6] ),
	OCL_SVAR( OC_INT16, Town, ratings[7] ),

	OCL_SVAR( OC_FILE_U32 | OC_VAR_U16, Town, have_ratings ),
	OCL_SVAR( OC_FILE_U32 | OC_VAR_U16, Town, statues ),
	OCL_NULL( 2 ),         ///< num_houses,        no longer in use
	OCL_SVAR(  OC_FILE_U8 | OC_VAR_U16, Town, time_until_rebuild ),
	OCL_SVAR(  OC_FILE_U8 | OC_VAR_I16, Town, growth_rate ),

	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Town, new_max_pass ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Town, new_max_mail ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Town, new_act_pass ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Town, new_act_mail ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Town, max_pass ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Town, max_mail ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Town, act_pass ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Town, act_mail ),

	OCL_SVAR(  OC_UINT8, Town, pct_pass_transported ),
	OCL_SVAR(  OC_UINT8, Town, pct_mail_transported ),

	OCL_SVAR( OC_TTD | OC_UINT16, Town, new_act_food ),
	OCL_SVAR( OC_TTD | OC_UINT16, Town, new_act_water ),
	OCL_SVAR( OC_TTD | OC_UINT16, Town, act_food ),
	OCL_SVAR( OC_TTD | OC_UINT16, Town, act_water ),

	OCL_SVAR(  OC_UINT8, Town, road_build_months ),
	OCL_SVAR(  OC_UINT8, Town, fund_buildings_months ),

	OCL_CNULL( OC_TTD, 8 ),         ///< some junk at the end of the record

	OCL_END()
};

static bool LoadOldTown(LoadgameState *ls, int num)
{
	Town *t = new (num) Town();
	if (!LoadChunk(ls, t, town_chunk)) return false;

	if (t->xy != 0) {
		if (_savegame_type == SGT_TTO) {
			/* 0x10B6 is auto-generated name, others are custom names */
			t->townnametype = t->townnametype == 0x10B6 ? 0x20C1 : t->townnametype + 0x2A00;
		}
	} else {
		delete t;
	}

	return true;
}

static uint16 _old_order;
static const OldChunks order_chunk[] = {
	OCL_VAR ( OC_UINT16,   1, &_old_order ),
	OCL_END()
};

static bool LoadOldOrder(LoadgameState *ls, int num)
{
	if (!LoadChunk(ls, NULL, order_chunk)) return false;

	Order *o = new (num) Order();
	o->AssignOrder(UnpackOldOrder(_old_order));

	if (o->IsType(OT_NOTHING)) {
		delete o;
	} else {
		/* Relink the orders to eachother (in the orders for one vehicle are behind eachother,
		 * with an invalid order (OT_NOTHING) as indication that it is the last order */
		Order *prev = Order::GetIfValid(num - 1);
		if (prev != NULL) prev->next = o;
	}

	return true;
}

static bool LoadOldAnimTileList(LoadgameState *ls, int num)
{
	/* This is sligthly hackish - we must load a chunk into an array whose
	 * address isn't static, but instead pointed to by _animated_tile_list.
	 * To achieve that, create an OldChunks list on the stack on the fly.
	 * The list cannot be static because the value of _animated_tile_list
	 * can change between calls. */

	const OldChunks anim_chunk[] = {
		OCL_VAR (   OC_TILE, 256, _animated_tile_list ),
		OCL_END ()
	};

	if (!LoadChunk(ls, NULL, anim_chunk)) return false;

	/* Update the animated tile counter by counting till the first zero in the array */
	for (_animated_tile_count = 0; _animated_tile_count < 256; _animated_tile_count++) {
		if (_animated_tile_list[_animated_tile_count] == 0) break;
	}

	return true;
}

static const OldChunks depot_chunk[] = {
	OCL_SVAR(   OC_TILE, Depot, xy ),
	OCL_VAR ( OC_UINT32,                1, &_old_town_index ),
	OCL_END()
};

static bool LoadOldDepot(LoadgameState *ls, int num)
{
	Depot *d = new (num) Depot();
	if (!LoadChunk(ls, d, depot_chunk)) return false;

	if (d->xy != 0) {
		/* In some cases, there could be depots referencing invalid town. */
		Town *t = Town::GetIfValid(RemapTownIndex(_old_town_index));
		if (t == NULL) t = Town::GetRandom();
		d->town = t;
	} else {
		delete d;
	}

	return true;
}

static StationID _current_station_id;
static uint16 _waiting_acceptance;
static uint8  _cargo_source;
static uint8  _cargo_days;

static const OldChunks goods_chunk[] = {
	OCL_VAR ( OC_UINT16, 1,          &_waiting_acceptance ),
	OCL_SVAR(  OC_UINT8, GoodsEntry, days_since_pickup ),
	OCL_SVAR(  OC_UINT8, GoodsEntry, rating ),
	OCL_VAR (  OC_UINT8, 1,          &_cargo_source ),
	OCL_VAR (  OC_UINT8, 1,          &_cargo_days ),
	OCL_SVAR(  OC_UINT8, GoodsEntry, last_speed ),
	OCL_SVAR(  OC_UINT8, GoodsEntry, last_age ),

	OCL_END()
};

static bool LoadOldGood(LoadgameState *ls, int num)
{
	/* for TTO games, 12th (num == 11) goods entry is created in the Station constructor */
	if (_savegame_type == SGT_TTO && num == 11) return true;

	Station *st = Station::Get(_current_station_id);
	GoodsEntry *ge = &st->goods[num];

	if (!LoadChunk(ls, ge, goods_chunk)) return false;

	SB(ge->acceptance_pickup, GoodsEntry::GES_ACCEPTANCE, 1, HasBit(_waiting_acceptance, 15));
	SB(ge->acceptance_pickup, GoodsEntry::GES_PICKUP, 1, _cargo_source != 0xFF);
	if (GB(_waiting_acceptance, 0, 12) != 0 && CargoPacket::CanAllocateItem()) {
		ge->cargo.Append(new CargoPacket(GB(_waiting_acceptance, 0, 12), _cargo_days, (_cargo_source == 0xFF) ? INVALID_STATION : _cargo_source, 0, 0));
	}

	return true;
}

static const OldChunks station_chunk[] = {
	OCL_SVAR(   OC_TILE, Station, xy ),
	OCL_VAR ( OC_UINT32,   1, &_old_town_index ),

	OCL_NULL( 4 ), ///< bus/lorry tile
	OCL_SVAR(   OC_TILE, Station, train_station.tile ),
	OCL_SVAR(   OC_TILE, Station, airport.tile ),
	OCL_SVAR(   OC_TILE, Station, dock_tile ),
	OCL_SVAR( OC_FILE_U8 | OC_VAR_U16, Station, train_station.w ),

	OCL_NULL( 1 ),         ///< sort-index, no longer in use
	OCL_NULL( 2 ),         ///< sign-width, no longer in use

	OCL_VAR ( OC_UINT16,   1, &_old_string_id ),

	OCL_NULL( 4 ),         ///< sign left/top, no longer in use

	OCL_SVAR( OC_FILE_U16 | OC_VAR_U8, Station, had_vehicle_of_type ),

	OCL_CHUNK( 12, LoadOldGood ),

	OCL_SVAR(  OC_UINT8, Station, time_since_load ),
	OCL_SVAR(  OC_UINT8, Station, time_since_unload ),
	OCL_SVAR(  OC_UINT8, Station, delete_ctr ),
	OCL_SVAR(  OC_UINT8, Station, owner ),
	OCL_SVAR(  OC_UINT8, Station, facilities ),
	OCL_SVAR( OC_TTD | OC_UINT8, Station, airport.type ),
	OCL_SVAR( OC_TTO | OC_FILE_U16 | OC_VAR_U64, Station, airport.flags ),
	OCL_NULL( 3 ),          ///< bus/truck status, blocked months, no longer in use
	OCL_CNULL( OC_TTD, 1 ), ///< unknown
	OCL_SVAR( OC_TTD | OC_FILE_U16 | OC_VAR_U64, Station, airport.flags ),
	OCL_CNULL( OC_TTD, 2 ), ///< last_vehicle. now last_vehicle_type
	OCL_CNULL( OC_TTD, 4 ), ///< junk at end of chunk

	OCL_END()
};

static bool LoadOldStation(LoadgameState *ls, int num)
{
	Station *st = new (num) Station();
	_current_station_id = num;

	if (!LoadChunk(ls, st, station_chunk)) return false;

	if (st->xy != 0) {
		st->town = Town::Get(RemapTownIndex(_old_town_index));

		if (_savegame_type == SGT_TTO) {
			if (IsInsideBS(_old_string_id, 0x180F, 32)) {
				st->string_id = STR_SV_STNAME + (_old_string_id - 0x180F); // automatic name
			} else {
				st->string_id = _old_string_id + 0x2800; // custom name
			}

			if (HasBit(st->airport.flags, 8)) {
				st->airport.type = 1; // large airport
			} else if (HasBit(st->airport.flags, 6)) {
				st->airport.type = 3; // oil rig
			} else {
				st->airport.type = 0; // small airport
			}
		} else {
			st->string_id = RemapOldStringID(_old_string_id);
		}
	} else {
		delete st;
	}

	return true;
}

static const OldChunks industry_chunk[] = {
	OCL_SVAR(   OC_TILE, Industry, location.tile ),
	OCL_VAR ( OC_UINT32,   1, &_old_town_index ),
	OCL_SVAR( OC_FILE_U8 | OC_VAR_U16, Industry, location.w ),
	OCL_SVAR( OC_FILE_U8 | OC_VAR_U16, Industry, location.h ),
	OCL_NULL( 2 ),  ///< used to be industry's produced_cargo

	OCL_SVAR( OC_TTD | OC_UINT16, Industry, produced_cargo_waiting[0] ),
	OCL_SVAR( OC_TTD | OC_UINT16, Industry, produced_cargo_waiting[1] ),
	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Industry, produced_cargo_waiting[0] ),
	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Industry, produced_cargo_waiting[1] ),

	OCL_SVAR(  OC_UINT8, Industry, production_rate[0] ),
	OCL_SVAR(  OC_UINT8, Industry, production_rate[1] ),

	OCL_NULL( 3 ),  ///< used to be industry's accepts_cargo

	OCL_SVAR(  OC_UINT8, Industry, prod_level ),

	OCL_SVAR( OC_UINT16, Industry, this_month_production[0] ),
	OCL_SVAR( OC_UINT16, Industry, this_month_production[1] ),
	OCL_SVAR( OC_UINT16, Industry, this_month_transported[0] ),
	OCL_SVAR( OC_UINT16, Industry, this_month_transported[1] ),

	OCL_SVAR(  OC_UINT8, Industry, last_month_pct_transported[0] ),
	OCL_SVAR(  OC_UINT8, Industry, last_month_pct_transported[1] ),

	OCL_SVAR( OC_UINT16, Industry, last_month_production[0] ),
	OCL_SVAR( OC_UINT16, Industry, last_month_production[1] ),
	OCL_SVAR( OC_UINT16, Industry, last_month_transported[0] ),
	OCL_SVAR( OC_UINT16, Industry, last_month_transported[1] ),

	OCL_SVAR(  OC_UINT8, Industry, type ),
	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Industry, counter ),
	OCL_SVAR(  OC_UINT8, Industry, owner ),
	OCL_SVAR(  OC_UINT8, Industry, random_colour ),
	OCL_SVAR( OC_TTD | OC_FILE_U8 | OC_VAR_I32, Industry, last_prod_year ),
	OCL_SVAR( OC_TTD | OC_UINT16, Industry, counter ),
	OCL_SVAR( OC_TTD | OC_UINT8, Industry, was_cargo_delivered ),

	OCL_CNULL( OC_TTD, 9 ), ///< Random junk at the end of this chunk

	OCL_END()
};

static bool LoadOldIndustry(LoadgameState *ls, int num)
{
	Industry *i = new (num) Industry();
	if (!LoadChunk(ls, i, industry_chunk)) return false;

	if (i->location.tile != 0) {
		i->town = Town::Get(RemapTownIndex(_old_town_index));

		if (_savegame_type == SGT_TTO) {
			if (i->type > 0x06) i->type++; // Printing Works were added
			if (i->type == 0x0A) i->type = 0x12; // Iron Ore Mine has different ID

			YearMonthDay ymd;
			ConvertDateToYMD(_date, &ymd);
			i->last_prod_year = ymd.year;

			i->random_colour = RemapTTOColour(i->random_colour);
		}

		Industry::IncIndustryTypeCount(i->type);
	} else {
		delete i;
	}

	return true;
}

static CompanyID _current_company_id;
static int32 _old_yearly;

static const OldChunks _company_yearly_chunk[] = {
	OCL_VAR(  OC_INT32,   1, &_old_yearly ),
	OCL_END()
};

static bool LoadOldCompanyYearly(LoadgameState *ls, int num)
{
	Company *c = Company::Get(_current_company_id);

	for (uint i = 0; i < 13; i++) {
		if (_savegame_type == SGT_TTO && i == 6) {
			_old_yearly = 0; // property maintenance
		} else {
			if (!LoadChunk(ls, NULL, _company_yearly_chunk)) return false;
		}

		c->yearly_expenses[num][i] = _old_yearly;
	}

	return true;
}

static const OldChunks _company_economy_chunk[] = {
	OCL_SVAR( OC_FILE_I32 | OC_VAR_I64, CompanyEconomyEntry, income ),
	OCL_SVAR( OC_FILE_I32 | OC_VAR_I64, CompanyEconomyEntry, expenses ),
	OCL_SVAR( OC_INT32,                 CompanyEconomyEntry, delivered_cargo ),
	OCL_SVAR( OC_INT32,                 CompanyEconomyEntry, performance_history ),
	OCL_SVAR( OC_TTD | OC_FILE_I32 | OC_VAR_I64, CompanyEconomyEntry, company_value ),

	OCL_END()
};

static bool LoadOldCompanyEconomy(LoadgameState *ls, int num)
{
	Company *c = Company::Get(_current_company_id);

	if (!LoadChunk(ls, &c->cur_economy, _company_economy_chunk)) return false;

	/* Don't ask, but the number in TTD(Patch) are inversed to OpenTTD */
	c->cur_economy.income   = -c->cur_economy.income;
	c->cur_economy.expenses = -c->cur_economy.expenses;

	for (uint i = 0; i < 24; i++) {
		if (!LoadChunk(ls, &c->old_economy[i], _company_economy_chunk)) return false;

		c->old_economy[i].income   = -c->old_economy[i].income;
		c->old_economy[i].expenses = -c->old_economy[i].expenses;
	}

	return true;
}

static const OldChunks _company_chunk[] = {
	OCL_VAR ( OC_UINT16,   1, &_old_string_id ),
	OCL_SVAR( OC_UINT32, Company, name_2 ),
	OCL_SVAR( OC_UINT32, Company, face ),
	OCL_VAR ( OC_UINT16,   1, &_old_string_id_2 ),
	OCL_SVAR( OC_UINT32, Company, president_name_2 ),

	OCL_SVAR( OC_FILE_I32 | OC_VAR_I64, Company, money ),
	OCL_SVAR( OC_FILE_I32 | OC_VAR_I64, Company, current_loan ),

	OCL_SVAR(  OC_UINT8, Company, colour ),
	OCL_SVAR(  OC_UINT8, Company, money_fraction ),
	OCL_SVAR(  OC_UINT8, Company, quarters_of_bankruptcy ),
	OCL_SVAR( OC_FILE_U8  | OC_VAR_U16, Company, bankrupt_asked ),
	OCL_SVAR( OC_FILE_U32 | OC_VAR_I64, Company, bankrupt_value ),
	OCL_SVAR( OC_UINT16, Company, bankrupt_timeout ),

	OCL_SVAR( OC_TTD | OC_UINT32, Company, cargo_types ),
	OCL_SVAR( OC_TTO | OC_FILE_U16 | OC_VAR_U32, Company, cargo_types ),

	OCL_CHUNK( 3, LoadOldCompanyYearly ),
	OCL_CHUNK( 1, LoadOldCompanyEconomy ),

	OCL_SVAR( OC_FILE_U16 | OC_VAR_I32, Company, inaugurated_year),
	OCL_SVAR(                  OC_TILE, Company, last_build_coordinate ),
	OCL_SVAR(                 OC_UINT8, Company, num_valid_stat_ent ),

	OCL_NULL( 230 ),         // Old AI

	OCL_SVAR(  OC_UINT8, Company, block_preview ),
	OCL_CNULL( OC_TTD, 1 ),           // Old AI
	OCL_SVAR( OC_TTD | OC_UINT8, Company, avail_railtypes ),
	OCL_SVAR(   OC_TILE, Company, location_of_HQ ),
	OCL_SVAR( OC_TTD | OC_UINT8, Company, share_owners[0] ),
	OCL_SVAR( OC_TTD | OC_UINT8, Company, share_owners[1] ),
	OCL_SVAR( OC_TTD | OC_UINT8, Company, share_owners[2] ),
	OCL_SVAR( OC_TTD | OC_UINT8, Company, share_owners[3] ),

	OCL_CNULL( OC_TTD, 8 ), ///< junk at end of chunk

	OCL_END()
};

static bool LoadOldCompany(LoadgameState *ls, int num)
{
	Company *c = new (num) Company();

	_current_company_id = (CompanyID)num;

	if (!LoadChunk(ls, c, _company_chunk)) return false;

	if (_old_string_id == 0) {
		delete c;
		return true;
	}

	if (_savegame_type == SGT_TTO) {
		/* adjust manager's face */
		if (HasBit(c->face, 27) && GB(c->face, 26, 1) == GB(c->face, 19, 1)) {
			/* if face would be black in TTD, adjust tie colour and thereby face colour */
			ClrBit(c->face, 27);
		}

		/* Company name */
		if (_old_string_id == 0 || _old_string_id == 0x4C00) {
			_old_string_id = STR_SV_UNNAMED; // "Unnamed"
		} else if (GB(_old_string_id, 8, 8) == 0x52) {
			_old_string_id += 0x2A00; // Custom name
		} else {
			_old_string_id = RemapOldStringID(_old_string_id += 0x240D); // Automatic name
		}
		c->name_1 = _old_string_id;

		/* Manager name */
		switch (_old_string_id_2) {
			case 0x4CDA: _old_string_id_2 = SPECSTR_PRESIDENT_NAME;    break; // automatic name
			case 0x0006: _old_string_id_2 = STR_SV_EMPTY;              break; // empty name
			default:     _old_string_id_2 = _old_string_id_2 + 0x2A00; break; // custom name
		}
		c->president_name_1 = _old_string_id_2;

		c->colour = RemapTTOColour(c->colour);

		if (num != 0) c->is_ai = true;
	} else {
		c->name_1 = RemapOldStringID(_old_string_id);
		c->president_name_1 = RemapOldStringID(_old_string_id_2);

		if (num == 0) {
			/* If the first company has no name, make sure we call it UNNAMED */
			if (c->name_1 == 0) {
				c->name_1 = STR_SV_UNNAMED;
			}
		} else {
			/* Beside some multiplayer maps (1 on 1), which we don't official support,
			 * all other companies are an AI.. mark them as such */
			c->is_ai = true;
		}

		/* Sometimes it is better to not ask.. in old scenarios, the money
		 * was always 893288 pounds. In the newer versions this is correct,
		 * but correct for those oldies
		 * Ps: this also means that if you had exact 893288 pounds, you will go back
		 * to 100000.. this is a very VERY small chance ;) */
		if (c->money == 893288) c->money = c->current_loan = 100000;
	}

	_company_colours[num] = (Colours)c->colour;
	c->inaugurated_year -= ORIGINAL_BASE_YEAR;

	return true;
}

static uint32 _old_order_ptr;
static uint16 _old_next_ptr;
static VehicleID _current_vehicle_id;

static const OldChunks vehicle_train_chunk[] = {
	OCL_SVAR(  OC_UINT8, Train, track ),
	OCL_SVAR(  OC_UINT8, Train, force_proceed ),
	OCL_SVAR( OC_UINT16, Train, crash_anim_pos ),
	OCL_SVAR(  OC_UINT8, Train, railtype ),

	OCL_NULL( 5 ), ///< Junk

	OCL_END()
};

static const OldChunks vehicle_road_chunk[] = {
	OCL_SVAR(  OC_UINT8, RoadVehicle, state ),
	OCL_SVAR(  OC_UINT8, RoadVehicle, frame ),
	OCL_SVAR( OC_UINT16, RoadVehicle, blocked_ctr ),
	OCL_SVAR(  OC_UINT8, RoadVehicle, overtaking ),
	OCL_SVAR(  OC_UINT8, RoadVehicle, overtaking_ctr ),
	OCL_SVAR( OC_UINT16, RoadVehicle, crashed_ctr ),
	OCL_SVAR(  OC_UINT8, RoadVehicle, reverse_ctr ),

	OCL_NULL( 1 ), ///< Junk

	OCL_END()
};

static const OldChunks vehicle_ship_chunk[] = {
	OCL_SVAR(  OC_UINT8, Ship, state ),

	OCL_NULL( 9 ), ///< Junk

	OCL_END()
};

static const OldChunks vehicle_air_chunk[] = {
	OCL_SVAR(  OC_UINT8, Aircraft, pos ),
	OCL_SVAR(  OC_FILE_U8 | OC_VAR_U16, Aircraft, targetairport ),
	OCL_SVAR( OC_UINT16, Aircraft, crashed_counter ),
	OCL_SVAR(  OC_UINT8, Aircraft, state ),

	OCL_NULL( 5 ), ///< Junk

	OCL_END()
};

static const OldChunks vehicle_effect_chunk[] = {
	OCL_SVAR( OC_UINT16, EffectVehicle, animation_state ),
	OCL_SVAR(  OC_UINT8, EffectVehicle, animation_substate ),

	OCL_NULL( 7 ), // Junk

	OCL_END()
};

static const OldChunks vehicle_disaster_chunk[] = {
	OCL_SVAR( OC_UINT16, DisasterVehicle, image_override ),
	OCL_SVAR( OC_UINT16, DisasterVehicle, big_ufo_destroyer_target ),

	OCL_NULL( 6 ), ///< Junk

	OCL_END()
};

static const OldChunks vehicle_empty_chunk[] = {
	OCL_NULL( 10 ), ///< Junk

	OCL_END()
};

static bool LoadOldVehicleUnion(LoadgameState *ls, int num)
{
	Vehicle *v = Vehicle::GetIfValid(_current_vehicle_id);
	uint temp = ls->total_read;
	bool res;

	if (v == NULL) {
		res = LoadChunk(ls, NULL, vehicle_empty_chunk);
	} else {
		switch (v->type) {
			default: SlErrorCorrupt("Invalid vehicle type");
			case VEH_TRAIN   : res = LoadChunk(ls, v, vehicle_train_chunk);    break;
			case VEH_ROAD    : res = LoadChunk(ls, v, vehicle_road_chunk);     break;
			case VEH_SHIP    : res = LoadChunk(ls, v, vehicle_ship_chunk);     break;
			case VEH_AIRCRAFT: res = LoadChunk(ls, v, vehicle_air_chunk);      break;
			case VEH_EFFECT  : res = LoadChunk(ls, v, vehicle_effect_chunk);   break;
			case VEH_DISASTER: res = LoadChunk(ls, v, vehicle_disaster_chunk); break;
		}
	}

	/* This chunk size should always be 10 bytes */
	if (ls->total_read - temp != 10) {
		DEBUG(oldloader, 0, "Assert failed in VehicleUnion: invalid chunk size");
		return false;
	}

	return res;
}

static uint16 _cargo_count;

static const OldChunks vehicle_chunk[] = {
	OCL_SVAR(  OC_UINT8, Vehicle, subtype ),

	OCL_NULL( 2 ),         ///< Hash, calculated automatically
	OCL_NULL( 2 ),         ///< Index, calculated automatically

	OCL_VAR ( OC_UINT32,   1, &_old_order_ptr ),
	OCL_VAR ( OC_UINT16,   1, &_old_order ),

	OCL_NULL ( 1 ), ///< num_orders, now calculated
	OCL_SVAR(  OC_UINT8, Vehicle, cur_implicit_order_index ),
	OCL_SVAR(   OC_TILE, Vehicle, dest_tile ),
	OCL_SVAR( OC_UINT16, Vehicle, load_unload_ticks ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Vehicle, date_of_last_service ),
	OCL_SVAR( OC_UINT16, Vehicle, service_interval ),
	OCL_SVAR( OC_FILE_U8 | OC_VAR_U16, Vehicle, last_station_visited ),
	OCL_SVAR( OC_TTD | OC_UINT8, Vehicle, tick_counter ),
	OCL_CNULL( OC_TTD, 2 ), ///< max_speed, now it is calculated.
	OCL_CNULL( OC_TTO, 1 ), ///< max_speed, now it is calculated.

	OCL_SVAR( OC_FILE_U16 | OC_VAR_I32, Vehicle, x_pos ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_I32, Vehicle, y_pos ),
	OCL_SVAR(  OC_UINT8, Vehicle, z_pos ),
	OCL_SVAR(  OC_UINT8, Vehicle, direction ),
	OCL_NULL( 2 ),         ///< x_offs and y_offs, calculated automatically
	OCL_NULL( 2 ),         ///< x_extent and y_extent, calculated automatically
	OCL_NULL( 1 ),         ///< z_extent, calculated automatically

	OCL_SVAR(  OC_UINT8, Vehicle, owner ),
	OCL_SVAR(   OC_TILE, Vehicle, tile ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Vehicle, cur_image ),

	OCL_NULL( 8 ),        ///< Vehicle sprite box, calculated automatically

	OCL_SVAR( OC_FILE_U16 | OC_VAR_U8, Vehicle, vehstatus ),
	OCL_SVAR( OC_TTD | OC_UINT16, Vehicle, cur_speed ),
	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Vehicle, cur_speed ),
	OCL_SVAR(  OC_UINT8, Vehicle, subspeed ),
	OCL_SVAR(  OC_UINT8, Vehicle, acceleration ),
	OCL_SVAR(  OC_UINT8, Vehicle, progress ),

	OCL_SVAR(  OC_UINT8, Vehicle, cargo_type ),
	OCL_SVAR( OC_TTD | OC_UINT16, Vehicle, cargo_cap ),
	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Vehicle, cargo_cap ),
	OCL_VAR ( OC_TTD | OC_UINT16, 1, &_cargo_count ),
	OCL_VAR ( OC_TTO | OC_FILE_U8 | OC_VAR_U16, 1, &_cargo_count ),
	OCL_VAR (  OC_UINT8, 1,       &_cargo_source ),
	OCL_VAR (  OC_UINT8, 1,       &_cargo_days ),

	OCL_SVAR( OC_TTO | OC_UINT8, Vehicle, tick_counter ),

	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Vehicle, age ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Vehicle, max_age ),
	OCL_SVAR( OC_FILE_U8 | OC_VAR_I32, Vehicle, build_year ),
	OCL_SVAR( OC_FILE_U8 | OC_VAR_U16, Vehicle, unitnumber ),

	OCL_SVAR( OC_TTD | OC_UINT16, Vehicle, engine_type ),
	OCL_SVAR( OC_TTO | OC_FILE_U8 | OC_VAR_U16, Vehicle, engine_type ),

	OCL_SVAR(  OC_UINT8, Vehicle, spritenum ),
	OCL_SVAR(  OC_UINT8, Vehicle, day_counter ),

	OCL_SVAR(  OC_UINT8, Vehicle, breakdowns_since_last_service ),
	OCL_SVAR(  OC_UINT8, Vehicle, breakdown_ctr ),
	OCL_SVAR(  OC_UINT8, Vehicle, breakdown_delay ),
	OCL_SVAR(  OC_UINT8, Vehicle, breakdown_chance ),

	OCL_CNULL( OC_TTO, 1 ),

	OCL_SVAR( OC_UINT16, Vehicle, reliability ),
	OCL_SVAR( OC_UINT16, Vehicle, reliability_spd_dec ),

	OCL_SVAR( OC_FILE_I32 | OC_VAR_I64, Vehicle, profit_this_year ),
	OCL_SVAR( OC_FILE_I32 | OC_VAR_I64, Vehicle, profit_last_year ),

	OCL_VAR ( OC_UINT16,   1, &_old_next_ptr ),

	OCL_SVAR( OC_FILE_U32 | OC_VAR_I64, Vehicle, value ),

	OCL_VAR ( OC_UINT16,   1, &_old_string_id ),

	OCL_CHUNK( 1, LoadOldVehicleUnion ),

	OCL_CNULL( OC_TTO, 24 ), ///< junk
	OCL_CNULL( OC_TTD, 20 ), ///< junk at end of struct (TTDPatch has some data in it)

	OCL_END()
};

/**
 * Load the vehicles of an old style savegame.
 * @param ls  State (buffer) of the currently loaded game.
 * @param num The number of vehicles to load.
 * @return True iff loading went without problems.
 */
bool LoadOldVehicle(LoadgameState *ls, int num)
{
	/* Read the TTDPatch flags, because we need some info from it */
	ReadTTDPatchFlags();

	for (uint i = 0; i < _old_vehicle_multiplier; i++) {
		_current_vehicle_id = num * _old_vehicle_multiplier + i;

		Vehicle *v;

		if (_savegame_type == SGT_TTO) {
			uint type = ReadByte(ls);
			switch (type) {
				default: return false;
				case 0x00 /* VEH_INVALID  */: v = NULL;                                        break;
				case 0x25 /* MONORAIL     */:
				case 0x20 /* VEH_TRAIN    */: v = new (_current_vehicle_id) Train();           break;
				case 0x21 /* VEH_ROAD     */: v = new (_current_vehicle_id) RoadVehicle();     break;
				case 0x22 /* VEH_SHIP     */: v = new (_current_vehicle_id) Ship();            break;
				case 0x23 /* VEH_AIRCRAFT */: v = new (_current_vehicle_id) Aircraft();        break;
				case 0x24 /* VEH_EFFECT   */: v = new (_current_vehicle_id) EffectVehicle();   break;
				case 0x26 /* VEH_DISASTER */: v = new (_current_vehicle_id) DisasterVehicle(); break;
			}

			if (!LoadChunk(ls, v, vehicle_chunk)) return false;
			if (v == NULL) continue;

			SpriteID sprite = v->cur_image;
			/* no need to override other sprites */
			if (IsInsideMM(sprite, 1460, 1465)) {
				sprite += 580; // aircraft smoke puff
			} else if (IsInsideMM(sprite, 2096, 2115)) {
				sprite += 977; // special effects part 1
			} else if (IsInsideMM(sprite, 2396, 2436)) {
				sprite += 1305; // special effects part 2
			} else if (IsInsideMM(sprite, 2516, 2539)) {
				sprite += 1385; // rotor or disaster-related vehicles
			}
			v->cur_image = sprite;

			switch (v->type) {
				case VEH_TRAIN: {
					static const byte spriteset_rail[] = {
						  0,   2,   4,   4,   8,  10,  12,  14,  16,  18,  20,  22,  40,  42,  44,  46,
						 48,  52,  54,  66,  68,  70,  72,  74,  76,  78,  80,  82,  84,  86, 120, 122,
						124, 126, 128, 130, 132, 134, 136, 138, 140
					};
					if (v->spritenum / 2 >= lengthof(spriteset_rail)) return false;
					v->spritenum = spriteset_rail[v->spritenum / 2]; // adjust railway sprite set offset
					Train::From(v)->railtype = type == 0x25 ? 1 : 0; // monorail / rail
					break;
				}

				case VEH_ROAD:
					if (v->spritenum >= 22) v->spritenum += 12;
					break;

				case VEH_SHIP:
					v->spritenum += 2;

					switch (v->spritenum) {
						case 2: // oil tanker && cargo type != oil
							if (v->cargo_type != CT_OIL) v->spritenum = 0; // make it a coal/goods ship
							break;
						case 4: // passenger ship && cargo type == mail
							if (v->cargo_type == CT_MAIL) v->spritenum = 0; // make it a mail ship
							break;
						default:
							break;
					}
					break;

				default:
					break;
			}

			switch (_old_string_id) {
				case 0x0000: break; // empty (invalid vehicles)
				case 0x0006: _old_string_id  = STR_SV_EMPTY;              break; // empty (special vehicles)
				case 0x8495: _old_string_id  = STR_SV_TRAIN_NAME;         break; // "Train X"
				case 0x8842: _old_string_id  = STR_SV_ROAD_VEHICLE_NAME;  break; // "Road Vehicle X"
				case 0x8C3B: _old_string_id  = STR_SV_SHIP_NAME;          break; // "Ship X"
				case 0x9047: _old_string_id  = STR_SV_AIRCRAFT_NAME;      break; // "Aircraft X"
				default:     _old_string_id += 0x2A00;                    break; // custom name
			}

			_old_vehicle_names[_current_vehicle_id] = _old_string_id;
		} else {
			/* Read the vehicle type and allocate the right vehicle */
			switch (ReadByte(ls)) {
				default: SlErrorCorrupt("Invalid vehicle type");
				case 0x00 /* VEH_INVALID */: v = NULL;                                        break;
				case 0x10 /* VEH_TRAIN   */: v = new (_current_vehicle_id) Train();           break;
				case 0x11 /* VEH_ROAD    */: v = new (_current_vehicle_id) RoadVehicle();     break;
				case 0x12 /* VEH_SHIP    */: v = new (_current_vehicle_id) Ship();            break;
				case 0x13 /* VEH_AIRCRAFT*/: v = new (_current_vehicle_id) Aircraft();        break;
				case 0x14 /* VEH_EFFECT  */: v = new (_current_vehicle_id) EffectVehicle();   break;
				case 0x15 /* VEH_DISASTER*/: v = new (_current_vehicle_id) DisasterVehicle(); break;
			}

			if (!LoadChunk(ls, v, vehicle_chunk)) return false;
			if (v == NULL) continue;

			_old_vehicle_names[_current_vehicle_id] = RemapOldStringID(_old_string_id);

			/* This should be consistent, else we have a big problem... */
			if (v->index != _current_vehicle_id) {
				DEBUG(oldloader, 0, "Loading failed - vehicle-array is invalid");
				return false;
			}
		}

		if (_old_order_ptr != 0 && _old_order_ptr != 0xFFFFFFFF) {
			uint max = _savegame_type == SGT_TTO ? 3000 : 5000;
			uint old_id = RemapOrderIndex(_old_order_ptr);
			if (old_id < max) v->orders.old = Order::Get(old_id); // don't accept orders > max number of orders
		}
		v->current_order.AssignOrder(UnpackOldOrder(_old_order));

		v->next = (Vehicle *)(size_t)_old_next_ptr;

		if (_cargo_count != 0 && CargoPacket::CanAllocateItem()) {
			StationID source =    (_cargo_source == 0xFF) ? INVALID_STATION : _cargo_source;
			TileIndex source_xy = (source != INVALID_STATION) ? Station::Get(source)->xy : 0;
			v->cargo.Append(new CargoPacket(_cargo_count, _cargo_days, source, source_xy, source_xy));
		}
	}

	return true;
}

static const OldChunks sign_chunk[] = {
	OCL_VAR ( OC_UINT16, 1, &_old_string_id ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_I32, Sign, x ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_I32, Sign, y ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_I8, Sign, z ),

	OCL_NULL( 6 ),         ///< Width of sign, no longer in use

	OCL_END()
};

static bool LoadOldSign(LoadgameState *ls, int num)
{
	Sign *si = new (num) Sign();
	if (!LoadChunk(ls, si, sign_chunk)) return false;

	if (_old_string_id != 0) {
		if (_savegame_type == SGT_TTO) {
			if (_old_string_id != 0x140A) si->name = CopyFromOldName(_old_string_id + 0x2A00);
		} else {
			si->name = CopyFromOldName(RemapOldStringID(_old_string_id));
		}
		si->owner = OWNER_NONE;
	} else {
		delete si;
	}

	return true;
}

static const OldChunks engine_chunk[] = {
	OCL_SVAR( OC_UINT16, Engine, company_avail ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Engine, intro_date ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, Engine, age ),
	OCL_SVAR( OC_UINT16, Engine, reliability ),
	OCL_SVAR( OC_UINT16, Engine, reliability_spd_dec ),
	OCL_SVAR( OC_UINT16, Engine, reliability_start ),
	OCL_SVAR( OC_UINT16, Engine, reliability_max ),
	OCL_SVAR( OC_UINT16, Engine, reliability_final ),
	OCL_SVAR( OC_UINT16, Engine, duration_phase_1 ),
	OCL_SVAR( OC_UINT16, Engine, duration_phase_2 ),
	OCL_SVAR( OC_UINT16, Engine, duration_phase_3 ),

	OCL_NULL( 1 ), // lifelength
	OCL_SVAR(  OC_UINT8, Engine, flags ),
	OCL_SVAR(  OC_UINT8, Engine, preview_company_rank ),
	OCL_SVAR(  OC_UINT8, Engine, preview_wait ),

	OCL_CNULL( OC_TTD, 2 ), ///< railtype + junk

	OCL_END()
};

static bool LoadOldEngine(LoadgameState *ls, int num)
{
	Engine *e = _savegame_type == SGT_TTO ? &_old_engines[num] : GetTempDataEngine(num);
	return LoadChunk(ls, e, engine_chunk);
}

static bool LoadOldEngineName(LoadgameState *ls, int num)
{
	Engine *e = GetTempDataEngine(num);
	e->name = CopyFromOldName(RemapOldStringID(ReadUint16(ls)));
	return true;
}

static const OldChunks subsidy_chunk[] = {
	OCL_SVAR(  OC_UINT8, Subsidy, cargo_type ),
	OCL_SVAR(  OC_UINT8, Subsidy, remaining ),
	OCL_SVAR(  OC_FILE_U8 | OC_VAR_U16, Subsidy, src ),
	OCL_SVAR(  OC_FILE_U8 | OC_VAR_U16, Subsidy, dst ),

	OCL_END()
};

static bool LoadOldSubsidy(LoadgameState *ls, int num)
{
	Subsidy *s = new (num) Subsidy();
	bool ret = LoadChunk(ls, s, subsidy_chunk);
	if (s->cargo_type == CT_INVALID) delete s;
	return ret;
}

static const OldChunks game_difficulty_chunk[] = {
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, max_no_competitors ),
	OCL_NULL( 2), // competitor_start_time
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, number_towns ),
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, industry_density ),
	OCL_SVAR( OC_FILE_U16 | OC_VAR_U32, DifficultySettings, max_loan ),
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, initial_interest ),
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, vehicle_costs ),
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, competitor_speed ),
	OCL_NULL( 2), // competitor_intelligence
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, vehicle_breakdowns ),
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, subsidy_multiplier ),
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, construction_cost ),
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, terrain_type ),
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, quantity_sea_lakes ),
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, economy ),
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, line_reverse_mode ),
	OCL_SVAR( OC_FILE_U16 |  OC_VAR_U8, DifficultySettings, disasters ),
	OCL_END()
};

static bool LoadOldGameDifficulty(LoadgameState *ls, int num)
{
	bool ret = LoadChunk(ls, &_settings_game.difficulty, game_difficulty_chunk);
	_settings_game.difficulty.max_loan *= 1000;
	return ret;
}


static bool LoadOldMapPart1(LoadgameState *ls, int num)
{
	if (_savegame_type == SGT_TTO) {
		MemSetT(_m, 0, OLD_MAP_SIZE);
		MemSetT(_me, 0, OLD_MAP_SIZE);
	}

	for (uint i = 0; i < OLD_MAP_SIZE; i++) {
		_m[i].m1 = ReadByte(ls);
	}
	for (uint i = 0; i < OLD_MAP_SIZE; i++) {
		_m[i].m2 = ReadByte(ls);
	}

	if (_savegame_type != SGT_TTO) {
		for (uint i = 0; i < OLD_MAP_SIZE; i++) {
			_old_map3[i * 2] = ReadByte(ls);
			_old_map3[i * 2 + 1] = ReadByte(ls);
		}
		for (uint i = 0; i < OLD_MAP_SIZE / 4; i++) {
			byte b = ReadByte(ls);
			_m[i * 4 + 0].m6 = GB(b, 0, 2);
			_m[i * 4 + 1].m6 = GB(b, 2, 2);
			_m[i * 4 + 2].m6 = GB(b, 4, 2);
			_m[i * 4 + 3].m6 = GB(b, 6, 2);
		}
	}

	return true;
}

static bool LoadOldMapPart2(LoadgameState *ls, int num)
{
	uint i;

	for (i = 0; i < OLD_MAP_SIZE; i++) {
		_m[i].type_height = ReadByte(ls);
	}
	for (i = 0; i < OLD_MAP_SIZE; i++) {
		_m[i].m5 = ReadByte(ls);
	}

	return true;
}

static bool LoadTTDPatchExtraChunks(LoadgameState *ls, int num)
{
	ReadTTDPatchFlags();

	DEBUG(oldloader, 2, "Found %d extra chunk(s)", _old_extra_chunk_nums);

	for (int i = 0; i != _old_extra_chunk_nums; i++) {
		uint16 id = ReadUint16(ls);
		uint32 len = ReadUint32(ls);

		switch (id) {
			/* List of GRFIDs, used in the savegame. 0x8004 is the new ID
			 * They are saved in a 'GRFID:4 active:1' format, 5 bytes for each entry */
			case 0x2:
			case 0x8004: {
				/* Skip the first element: TTDP hack for the Action D special variables (FFFF0000 01) */
				ReadUint32(ls); ReadByte(ls); len -= 5;

				ClearGRFConfigList(&_grfconfig);
				while (len != 0) {
					uint32 grfid = ReadUint32(ls);

					if (ReadByte(ls) == 1) {
						GRFConfig *c = new GRFConfig("TTDP game, no information");
						c->ident.grfid = grfid;

						AppendToGRFConfigList(&_grfconfig, c);
						DEBUG(oldloader, 3, "TTDPatch game using GRF file with GRFID %0X", BSWAP32(c->ident.grfid));
					}
					len -= 5;
				}

				/* Append static NewGRF configuration */
				AppendStaticGRFConfigs(&_grfconfig);
				break;
			}

			/* TTDPatch version and configuration */
			case 0x3:
				_ttdp_version = ReadUint32(ls);
				DEBUG(oldloader, 3, "Game saved with TTDPatch version %d.%d.%d r%d",
					GB(_ttdp_version, 24, 8), GB(_ttdp_version, 20, 4), GB(_ttdp_version, 16, 4), GB(_ttdp_version, 0, 16));
				len -= 4;
				while (len-- != 0) ReadByte(ls); // skip the configuration
				break;

			default:
				DEBUG(oldloader, 4, "Skipping unknown extra chunk %X", id);
				while (len-- != 0) ReadByte(ls);
				break;
		}
	}

	return true;
}

extern TileIndex _cur_tileloop_tile;
extern uint16 _disaster_delay;
extern byte _trees_tick_ctr;
static const OldChunks main_chunk[] = {
	OCL_ASSERT( OC_TTD, 0 ),
	OCL_ASSERT( OC_TTO, 0 ),
	OCL_VAR ( OC_FILE_U16 | OC_VAR_U32, 1, &_date ),
	OCL_VAR ( OC_UINT16,   1, &_date_fract ),
	OCL_NULL( 600 ),            ///< TextEffects
	OCL_VAR ( OC_UINT32,   2, &_random.state ),

	OCL_ASSERT( OC_TTD, 0x264 ),
	OCL_ASSERT( OC_TTO, 0x264 ),

	OCL_CCHUNK( OC_TTD, 70, LoadOldTown ),
	OCL_CCHUNK( OC_TTO, 80, LoadOldTown ),

	OCL_ASSERT( OC_TTD, 0x1C18 ),
	OCL_ASSERT( OC_TTO, 0x1AC4 ),

	OCL_CCHUNK( OC_TTD, 5000, LoadOldOrder ),
	OCL_CCHUNK( OC_TTO, 3000, LoadOldOrder ),

	OCL_ASSERT( OC_TTD, 0x4328 ),
	OCL_ASSERT( OC_TTO, 0x3234 ),

	OCL_CHUNK( 1, LoadOldAnimTileList ),
	OCL_NULL( 4 ),              ///< old end-of-order-list-pointer, no longer in use

	OCL_ASSERT( OC_TTO, 0x3438 ),

	OCL_CCHUNK( OC_TTD, 255, LoadOldDepot ),
	OCL_CCHUNK( OC_TTO, 252, LoadOldDepot ),

	OCL_ASSERT( OC_TTD, 0x4B26 ),
	OCL_ASSERT( OC_TTO, 0x3A20 ),

	OCL_NULL( 4 ),              ///< town counter,  no longer in use
	OCL_NULL( 2 ),              ///< timer_counter, no longer in use
	OCL_NULL( 2 ),              ///< land_code,     no longer in use

	OCL_VAR ( OC_FILE_U16 | OC_VAR_U8, 1, &_age_cargo_skip_counter ),
	OCL_VAR ( OC_UINT16,   1, &_tick_counter ),
	OCL_VAR (   OC_TILE,   1, &_cur_tileloop_tile ),

	OCL_ASSERT( OC_TTO, 0x3A2E ),

	OCL_CNULL( OC_TTO, 48 * 6 ), ///< prices
	OCL_CNULL( OC_TTD, 49 * 6 ), ///< prices

	OCL_ASSERT( OC_TTO, 0x3B4E ),

	OCL_CNULL( OC_TTO, 11 * 8 ), ///< cargo payment rates
	OCL_CNULL( OC_TTD, 12 * 8 ), ///< cargo payment rates

	OCL_ASSERT( OC_TTD, 0x4CBA ),
	OCL_ASSERT( OC_TTO, 0x3BA6 ),

	OCL_CHUNK( 1, LoadOldMapPart1 ),

	OCL_ASSERT( OC_TTD, 0x48CBA ),
	OCL_ASSERT( OC_TTO, 0x23BA6 ),

	OCL_CCHUNK( OC_TTD, 250, LoadOldStation ),
	OCL_CCHUNK( OC_TTO, 200, LoadOldStation ),

	OCL_ASSERT( OC_TTO, 0x29E16 ),

	OCL_CCHUNK( OC_TTD, 90, LoadOldIndustry ),
	OCL_CCHUNK( OC_TTO, 100, LoadOldIndustry ),

	OCL_ASSERT( OC_TTO, 0x2ADB6 ),

	OCL_CHUNK(  8, LoadOldCompany ),

	OCL_ASSERT( OC_TTD, 0x547F2 ),
	OCL_ASSERT( OC_TTO, 0x2C746 ),

	OCL_CCHUNK( OC_TTD, 850, LoadOldVehicle ),
	OCL_CCHUNK( OC_TTO, 800, LoadOldVehicle ),

	OCL_ASSERT( OC_TTD, 0x6F0F2 ),
	OCL_ASSERT( OC_TTO, 0x45746 ),

	OCL_VAR ( OC_TTD | OC_UINT8 | OC_DEREFERENCE_POINTER, 32 * 500, &_old_name_array ),
	OCL_VAR ( OC_TTO | OC_UINT8 | OC_DEREFERENCE_POINTER, 24 * 200, &_old_name_array ),

	OCL_ASSERT( OC_TTO, 0x46A06 ),

	OCL_NULL( 0x2000 ),            ///< Old hash-table, no longer in use

	OCL_CHUNK( 40, LoadOldSign ),

	OCL_ASSERT( OC_TTO, 0x48C36 ),

	OCL_CCHUNK( OC_TTD, 256, LoadOldEngine ),
	OCL_CCHUNK( OC_TTO, 103, LoadOldEngine ),

	OCL_ASSERT( OC_TTO, 0x496AC ),

	OCL_NULL ( 2 ), // _vehicle_id_ctr_day

	OCL_CHUNK(  8, LoadOldSubsidy ),

	OCL_ASSERT( OC_TTO, 0x496CE ),

	OCL_VAR ( OC_FILE_U16 | OC_VAR_U32,   1, &_next_competitor_start ),

	OCL_CNULL( OC_TTO, 2 ),  ///< available monorail bitmask

	OCL_VAR ( OC_FILE_I16 | OC_VAR_I32,   1, &_saved_scrollpos_x ),
	OCL_VAR ( OC_FILE_I16 | OC_VAR_I32,   1, &_saved_scrollpos_y ),
	OCL_VAR ( OC_FILE_U16 | OC_VAR_U8,    1, &_saved_scrollpos_zoom ),

	OCL_NULL( 4 ),           ///< max_loan
	OCL_VAR ( OC_FILE_U32 | OC_VAR_I64,   1, &_economy.old_max_loan_unround ),
	OCL_VAR (  OC_INT16,    1, &_economy.fluct ),

	OCL_VAR ( OC_UINT16,    1, &_disaster_delay ),

	OCL_ASSERT( OC_TTO, 0x496E4 ),

	OCL_CNULL( OC_TTD, 144 ),             ///< cargo-stuff

	OCL_CCHUNK( OC_TTD, 256, LoadOldEngineName ),

	OCL_CNULL( OC_TTD, 144 ),             ///< AI cargo-stuff
	OCL_NULL( 2 ),               ///< Company indexes of companies, no longer in use
	OCL_NULL( 1 ),               ///< Station tick counter, no longer in use

	OCL_VAR (  OC_UINT8,    1, &_settings_game.locale.currency ),
	OCL_VAR (  OC_UINT8,    1, &_settings_game.locale.units ),
	OCL_VAR ( OC_FILE_U8 | OC_VAR_U32,    1, &_cur_company_tick_index ),

	OCL_NULL( 2 ),               ///< Date stuff, calculated automatically
	OCL_NULL( 8 ),               ///< Company colours, calculated automatically

	OCL_VAR (  OC_UINT8,    1, &_economy.infl_amount ),
	OCL_VAR (  OC_UINT8,    1, &_economy.infl_amount_pr ),
	OCL_VAR (  OC_UINT8,    1, &_economy.interest_rate ),
	OCL_NULL( 1 ), // available airports
	OCL_VAR (  OC_UINT8,    1, &_settings_game.vehicle.road_side ),
	OCL_VAR (  OC_UINT8,    1, &_settings_game.game_creation.town_name ),

	OCL_CHUNK( 1, LoadOldGameDifficulty ),

	OCL_ASSERT( OC_TTD, 0x77130 ),

	OCL_VAR (  OC_UINT8,    1, &_settings_game.difficulty.diff_level ),

	OCL_VAR ( OC_TTD | OC_UINT8,    1, &_settings_game.game_creation.landscape ),
	OCL_VAR ( OC_TTD | OC_UINT8,    1, &_trees_tick_ctr ),

	OCL_CNULL( OC_TTD, 1 ),               ///< Custom vehicle types yes/no, no longer used
	OCL_VAR ( OC_TTD | OC_UINT8,    1, &_settings_game.game_creation.snow_line ),

	OCL_CNULL( OC_TTD, 32 ),              ///< new_industry_randtable, no longer used (because of new design)
	OCL_CNULL( OC_TTD, 36 ),              ///< cargo-stuff

	OCL_ASSERT( OC_TTD, 0x77179 ),
	OCL_ASSERT( OC_TTO, 0x4971D ),

	OCL_CHUNK( 1, LoadOldMapPart2 ),

	OCL_ASSERT( OC_TTD, 0x97179 ),
	OCL_ASSERT( OC_TTO, 0x6971D ),

	/* Below any (if available) extra chunks from TTDPatch can follow */
	OCL_CHUNK(1, LoadTTDPatchExtraChunks),

	OCL_END()
};

bool LoadTTDMain(LoadgameState *ls)
{
	DEBUG(oldloader, 3, "Reading main chunk...");

	_read_ttdpatch_flags = false;

	/* Load the biggest chunk */
	SmallStackSafeStackAlloc<byte, OLD_MAP_SIZE * 2> map3;
	_old_map3 = map3.data;
	_old_vehicle_names = NULL;
	try {
		if (!LoadChunk(ls, NULL, main_chunk)) {
			DEBUG(oldloader, 0, "Loading failed");
			free(_old_vehicle_names);
			return false;
		}
	} catch (...) {
		free(_old_vehicle_names);
		throw;
	}

	DEBUG(oldloader, 3, "Done, converting game data...");

	FixTTDMapArray();
	FixTTDDepots();

	/* Fix some general stuff */
	_settings_game.game_creation.landscape = _settings_game.game_creation.landscape & 0xF;

	/* Fix the game to be compatible with OpenTTD */
	FixOldTowns();
	FixOldVehicles();

	/* We have a new difficulty setting */
	_settings_game.difficulty.town_council_tolerance = Clamp(_settings_game.difficulty.diff_level, 0, 2);

	DEBUG(oldloader, 3, "Finished converting game data");
	DEBUG(oldloader, 1, "TTD(Patch) savegame successfully converted");

	free(_old_vehicle_names);

	return true;
}

bool LoadTTOMain(LoadgameState *ls)
{
	DEBUG(oldloader, 3, "Reading main chunk...");

	_read_ttdpatch_flags = false;

	SmallStackSafeStackAlloc<byte, 103 * sizeof(Engine)> engines; // we don't want to call Engine constructor here
	_old_engines = (Engine *)engines.data;
	SmallStackSafeStackAlloc<StringID, 800> vehnames;
	_old_vehicle_names = vehnames.data;

	/* Load the biggest chunk */
	if (!LoadChunk(ls, NULL, main_chunk)) {
		DEBUG(oldloader, 0, "Loading failed");
		return false;
	}
	DEBUG(oldloader, 3, "Done, converting game data...");

	if (_settings_game.game_creation.town_name != 0) _settings_game.game_creation.town_name++;

	_settings_game.game_creation.landscape = 0;
	_trees_tick_ctr = 0xFF;

	if (!FixTTOMapArray() || !FixTTOEngines()) {
		DEBUG(oldloader, 0, "Conversion failed");
		return false;
	}

	FixOldTowns();
	FixOldVehicles();
	FixTTOCompanies();

	/* We have a new difficulty setting */
	_settings_game.difficulty.town_council_tolerance = Clamp(_settings_game.difficulty.diff_level, 0, 2);

	/* SVXConverter about cargo payment rates correction:
	 * "increase them to compensate for the faster time advance in TTD compared to TTO
	 * which otherwise would cause much less income while the annual running costs of
	 * the vehicles stay the same" */
	_economy.inflation_payment = min(_economy.inflation_payment * 124 / 74, MAX_INFLATION);

	DEBUG(oldloader, 3, "Finished converting game data");
	DEBUG(oldloader, 1, "TTO savegame successfully converted");

	return true;
}