OpenTTD

- Main Page
- Related Pages
- Modules
- Namespaces
- Data Structures
- Files

- File List
- Globals

saveload.cpp
Go to the documentation of this file.
1 /* $Id: saveload.cpp 27793 2017-03-13 22:16:44Z peter1138 $ */
2
3 /*
4 * This file is part of OpenTTD.
5 * 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.
6 * 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.
7 * 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/>.
8 */
9
24 #include "../stdafx.h"
25 #include "../debug.h"
26 #include "../station_base.h"
27 #include "../thread/thread.h"
28 #include "../town.h"
29 #include "../network/network.h"
30 #include "../window_func.h"
31 #include "../strings_func.h"
32 #include "../core/endian_func.hpp"
33 #include "../vehicle_base.h"
34 #include "../company_func.h"
35 #include "../date_func.h"
36 #include "../autoreplace_base.h"
37 #include "../roadstop_base.h"
38 #include "../linkgraph/linkgraph.h"
39 #include "../linkgraph/linkgraphjob.h"
40 #include "../statusbar_gui.h"
41 #include "../fileio_func.h"
42 #include "../gamelog.h"
43 #include "../string_func.h"
44 #include "../fios.h"
45 #include "../error.h"
46
47 #include "table/strings.h"
48
49 #include "saveload_internal.h"
50 #include "saveload_filter.h"
51
52 #include "../safeguards.h"
53
54 /*
55 * Previous savegame versions, the trunk revision where they were
56 * introduced and the released version that had that particular
57 * savegame version.
58 * Up to savegame version 18 there is a minor version as well.
59 *
60 * 1.0 0.1.x, 0.2.x
61 * 2.0 0.3.0
62 * 2.1 0.3.1, 0.3.2
63 * 3.x lost
64 * 4.0 1
65 * 4.1 122 0.3.3, 0.3.4
66 * 4.2 1222 0.3.5
67 * 4.3 1417
68 * 4.4 1426
69 * 5.0 1429
70 * 5.1 1440
71 * 5.2 1525 0.3.6
72 * 6.0 1721
73 * 6.1 1768
74 * 7.0 1770
75 * 8.0 1786
76 * 9.0 1909
77 * 10.0 2030
78 * 11.0 2033
79 * 11.1 2041
80 * 12.1 2046
81 * 13.1 2080 0.4.0, 0.4.0.1
82 * 14.0 2441
83 * 15.0 2499
84 * 16.0 2817
85 * 16.1 3155
86 * 17.0 3212
87 * 17.1 3218
88 * 18 3227
89 * 19 3396
90 * 20 3403
91 * 21 3472 0.4.x
92 * 22 3726
93 * 23 3915
94 * 24 4150
95 * 25 4259
96 * 26 4466
97 * 27 4757
98 * 28 4987
99 * 29 5070
100 * 30 5946
101 * 31 5999
102 * 32 6001
103 * 33 6440
104 * 34 6455
105 * 35 6602
106 * 36 6624
107 * 37 7182
108 * 38 7195
109 * 39 7269
110 * 40 7326
111 * 41 7348 0.5.x
112 * 42 7573
113 * 43 7642
114 * 44 8144
115 * 45 8501
116 * 46 8705
117 * 47 8735
118 * 48 8935
119 * 49 8969
120 * 50 8973
121 * 51 8978
122 * 52 9066
123 * 53 9316
124 * 54 9613
125 * 55 9638
126 * 56 9667
127 * 57 9691
128 * 58 9762
129 * 59 9779
130 * 60 9874
131 * 61 9892
132 * 62 9905
133 * 63 9956
134 * 64 10006
135 * 65 10210
136 * 66 10211
137 * 67 10236
138 * 68 10266
139 * 69 10319
140 * 70 10541
141 * 71 10567
142 * 72 10601
143 * 73 10903
144 * 74 11030
145 * 75 11107
146 * 76 11139
147 * 77 11172
148 * 78 11176
149 * 79 11188
150 * 80 11228
151 * 81 11244
152 * 82 11410
153 * 83 11589
154 * 84 11822
155 * 85 11874
156 * 86 12042
157 * 87 12129
158 * 88 12134
159 * 89 12160
160 * 90 12293
161 * 91 12347
162 * 92 12381 0.6.x
163 * 93 12648
164 * 94 12816
165 * 95 12924
166 * 96 13226
167 * 97 13256
168 * 98 13375
169 * 99 13838
170 * 100 13952
171 * 101 14233
172 * 102 14332
173 * 103 14598
174 * 104 14735
175 * 105 14803
176 * 106 14919
177 * 107 15027
178 * 108 15045
179 * 109 15075
180 * 110 15148
181 * 111 15190
182 * 112 15290
183 * 113 15340
184 * 114 15601
185 * 115 15695
186 * 116 15893 0.7.x
187 * 117 16037
188 * 118 16129
189 * 119 16242
190 * 120 16439
191 * 121 16694
192 * 122 16855
193 * 123 16909
194 * 124 16993
195 * 125 17113
196 * 126 17433
197 * 127 17439
198 * 128 18281
199 * 129 18292
200 * 130 18404
201 * 131 18481
202 * 132 18522
203 * 133 18674
204 * 134 18703
205 * 135 18719
206 * 136 18764
207 * 137 18912
208 * 138 18942 1.0.x
209 * 139 19346
210 * 140 19382
211 * 141 19799
212 * 142 20003
213 * 143 20048
214 * 144 20334
215 * 145 20376
216 * 146 20446
217 * 147 20621
218 * 148 20659
219 * 149 20832
220 * 150 20857
221 * 151 20918
222 * 152 21171
223 * 153 21263
224 * 154 21426
225 * 155 21453
226 * 156 21728
227 * 157 21862
228 * 158 21933
229 * 159 21962
230 * 160 21974 1.1.x
231 * 161 22567
232 * 162 22713
233 * 163 22767
234 * 164 23290
235 * 165 23304
236 * 166 23415
237 * 167 23504
238 * 168 23637
239 * 169 23816
240 * 170 23826
241 * 171 23835
242 * 172 23947
243 * 173 23967 1.2.0-RC1
244 * 174 23973 1.2.x
245 * 175 24136
246 * 176 24446
247 * 177 24619
248 * 178 24789
249 * 179 24810
250 * 180 24998 1.3.x
251 * 181 25012
252 * 182 25296
253 * 183 25363
254 * 184 25508
255 * 185 25620
256 * 186 25833
257 * 187 25899
258 * 188 26169 1.4.x
259 * 189 26450
260 * 190 26547
261 * 191 26646
262 * 192 26700
263 * 193 26802
264 * 194 26881 1.5.x, 1.6.0
265 * 195 27572 1.6.x
266 * 196 27778 1.7.x
267 */
268 extern const uint16 SAVEGAME_VERSION = 196;
269
270 SavegameType _savegame_type;
271 FileToSaveLoad _file_to_saveload;
272
273 uint32 _ttdp_version;
274 uint16 _sl_version;
275 byte _sl_minor_version;
276 char _savegame_format[8];
277 bool _do_autosave;
278
280 enum SaveLoadAction {
281 SLA_LOAD,
282 SLA_SAVE,
283 SLA_PTRS,
284 SLA_NULL,
285 SLA_LOAD_CHECK,
286 };
287
288 enum NeedLength {
289 NL_NONE = 0,
290 NL_WANTLENGTH = 1,
291 NL_CALCLENGTH = 2,
292 };
293
295 static const size_t MEMORY_CHUNK_SIZE = 128 * 1024;
296
298 struct ReadBuffer {
299 byte buf[MEMORY_CHUNK_SIZE];
300 byte *bufp;
301 byte *bufe;
302 LoadFilter *reader;
303 size_t read;
304
309 ReadBuffer(LoadFilter *reader) : bufp(NULL), bufe(NULL), reader(reader), read(0)
310 {
311 }
312
313 inline byte ReadByte()
314 {
315 if (this->bufp == this->bufe) {
316 size_t len = this->reader->Read(this->buf, lengthof(this->buf));
317 if (len == 0) SlErrorCorrupt("Unexpected end of chunk");
318
319 this->read += len;
320 this->bufp = this->buf;
321 this->bufe = this->buf + len;
322 }
323
324 return *this->bufp++;
325 }
326
331 size_t GetSize() const
332 {
333 return this->read - (this->bufe - this->bufp);
334 }
335 };
336
337
339 struct MemoryDumper {
340 AutoFreeSmallVector<byte *, 16> blocks;
341 byte *buf;
342 byte *bufe;
343
345 MemoryDumper() : buf(NULL), bufe(NULL)
346 {
347 }
348
353 inline void WriteByte(byte b)
354 {
355 /* Are we at the end of this chunk? */
356 if (this->buf == this->bufe) {
357 this->buf = CallocT<byte>(MEMORY_CHUNK_SIZE);
358 *this->blocks.Append() = this->buf;
359 this->bufe = this->buf + MEMORY_CHUNK_SIZE;
360 }
361
362 *this->buf++ = b;
363 }
364
369 void Flush(SaveFilter *writer)
370 {
371 uint i = 0;
372 size_t t = this->GetSize();
373
374 while (t > 0) {
375 size_t to_write = min(MEMORY_CHUNK_SIZE, t);
376
377 writer->Write(this->blocks[i++], to_write);
378 t -= to_write;
379 }
380
381 writer->Finish();
382 }
383
388 size_t GetSize() const
389 {
390 return this->blocks.Length() * MEMORY_CHUNK_SIZE - (this->bufe - this->buf);
391 }
392 };
393
395 struct SaveLoadParams {
396 SaveLoadAction action;
397 NeedLength need_length;
398 byte block_mode;
399 bool error;
400
401 size_t obj_len;
402 int array_index, last_array_index;
403
404 MemoryDumper *dumper;
405 SaveFilter *sf;
406
407 ReadBuffer *reader;
408 LoadFilter *lf;
409
410 StringID error_str;
411 char *extra_msg;
412
413 byte ff_state;
414 bool saveinprogress;
415 };
416
417 static SaveLoadParams _sl;
418
419 /* these define the chunks */
420 extern const ChunkHandler _gamelog_chunk_handlers[];
421 extern const ChunkHandler _map_chunk_handlers[];
422 extern const ChunkHandler _misc_chunk_handlers[];
423 extern const ChunkHandler _name_chunk_handlers[];
424 extern const ChunkHandler _cheat_chunk_handlers[] ;
425 extern const ChunkHandler _setting_chunk_handlers[];
426 extern const ChunkHandler _company_chunk_handlers[];
427 extern const ChunkHandler _engine_chunk_handlers[];
428 extern const ChunkHandler _veh_chunk_handlers[];
429 extern const ChunkHandler _waypoint_chunk_handlers[];
430 extern const ChunkHandler _depot_chunk_handlers[];
431 extern const ChunkHandler _order_chunk_handlers[];
432 extern const ChunkHandler _town_chunk_handlers[];
433 extern const ChunkHandler _sign_chunk_handlers[];
434 extern const ChunkHandler _station_chunk_handlers[];
435 extern const ChunkHandler _industry_chunk_handlers[];
436 extern const ChunkHandler _economy_chunk_handlers[];
437 extern const ChunkHandler _subsidy_chunk_handlers[];
438 extern const ChunkHandler _cargomonitor_chunk_handlers[];
439 extern const ChunkHandler _goal_chunk_handlers[];
440 extern const ChunkHandler _story_page_chunk_handlers[];
441 extern const ChunkHandler _ai_chunk_handlers[];
442 extern const ChunkHandler _game_chunk_handlers[];
443 extern const ChunkHandler _animated_tile_chunk_handlers[];
444 extern const ChunkHandler _newgrf_chunk_handlers[];
445 extern const ChunkHandler _group_chunk_handlers[];
446 extern const ChunkHandler _cargopacket_chunk_handlers[];
447 extern const ChunkHandler _autoreplace_chunk_handlers[];
448 extern const ChunkHandler _labelmaps_chunk_handlers[];
449 extern const ChunkHandler _linkgraph_chunk_handlers[];
450 extern const ChunkHandler _airport_chunk_handlers[];
451 extern const ChunkHandler _object_chunk_handlers[];
452 extern const ChunkHandler _persistent_storage_chunk_handlers[];
453
455 static const ChunkHandler * const _chunk_handlers[] = {
456 _gamelog_chunk_handlers,
457 _map_chunk_handlers,
458 _misc_chunk_handlers,
459 _name_chunk_handlers,
460 _cheat_chunk_handlers,
461 _setting_chunk_handlers,
462 _veh_chunk_handlers,
463 _waypoint_chunk_handlers,
464 _depot_chunk_handlers,
465 _order_chunk_handlers,
466 _industry_chunk_handlers,
467 _economy_chunk_handlers,
468 _subsidy_chunk_handlers,
469 _cargomonitor_chunk_handlers,
470 _goal_chunk_handlers,
471 _story_page_chunk_handlers,
472 _engine_chunk_handlers,
473 _town_chunk_handlers,
474 _sign_chunk_handlers,
475 _station_chunk_handlers,
476 _company_chunk_handlers,
477 _ai_chunk_handlers,
478 _game_chunk_handlers,
479 _animated_tile_chunk_handlers,
480 _newgrf_chunk_handlers,
481 _group_chunk_handlers,
482 _cargopacket_chunk_handlers,
483 _autoreplace_chunk_handlers,
484 _labelmaps_chunk_handlers,
485 _linkgraph_chunk_handlers,
486 _airport_chunk_handlers,
487 _object_chunk_handlers,
488 _persistent_storage_chunk_handlers,
489 NULL,
490 };
491
496 #define FOR_ALL_CHUNK_HANDLERS(ch) \
497 for (const ChunkHandler * const *chsc = _chunk_handlers; *chsc != NULL; chsc++) \
498 for (const ChunkHandler *ch = *chsc; ch != NULL; ch = (ch->flags & CH_LAST) ? NULL : ch + 1)
499
501 static void SlNullPointers()
502 {
503 _sl.action = SLA_NULL;
504
505 /* We don't want any savegame conversion code to run
506 * during NULLing; especially those that try to get
507 * pointers from other pools. */
508 _sl_version = SAVEGAME_VERSION;
509
510 DEBUG(sl, 1, "Nulling pointers");
511
512 FOR_ALL_CHUNK_HANDLERS(ch) {
513 if (ch->ptrs_proc != NULL) {
514 DEBUG(sl, 2, "Nulling pointers for %c%c%c%c", ch->id >> 24, ch->id >> 16, ch->id >> 8, ch->id);
515 ch->ptrs_proc();
516 }
517 }
518
519 DEBUG(sl, 1, "All pointers nulled");
520
521 assert(_sl.action == SLA_NULL);
522 }
523
532 void NORETURN SlError(StringID string, const char *extra_msg)
533 {
534 /* Distinguish between loading into _load_check_data vs. normal save/load. */
535 if (_sl.action == SLA_LOAD_CHECK) {
536 _load_check_data.error = string;
537 free(_load_check_data.error_data);
538 _load_check_data.error_data = (extra_msg == NULL) ? NULL : stredup(extra_msg);
539 } else {
540 _sl.error_str = string;
541 free(_sl.extra_msg);
542 _sl.extra_msg = (extra_msg == NULL) ? NULL : stredup(extra_msg);
543 }
544
545 /* We have to NULL all pointers here; we might be in a state where
546 * the pointers are actually filled with indices, which means that
547 * when we access them during cleaning the pool dereferences of
548 * those indices will be made with segmentation faults as result. */
549 if (_sl.action == SLA_LOAD || _sl.action == SLA_PTRS) SlNullPointers();
550 throw std::exception();
551 }
552
560 void NORETURN SlErrorCorrupt(const char *msg)
561 {
562 SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_SAVEGAME, msg);
563 }
564
565
566 typedef void (*AsyncSaveFinishProc)();
567 static AsyncSaveFinishProc _async_save_finish = NULL;
568 static ThreadObject *_save_thread;
569
574 static void SetAsyncSaveFinish(AsyncSaveFinishProc proc)
575 {
576 if (_exit_game) return;
577 while (_async_save_finish != NULL) CSleep(10);
578
579 _async_save_finish = proc;
580 }
581
585 void ProcessAsyncSaveFinish()
586 {
587 if (_async_save_finish == NULL) return;
588
589 _async_save_finish();
590
591 _async_save_finish = NULL;
592
593 if (_save_thread != NULL) {
594 _save_thread->Join();
595 delete _save_thread;
596 _save_thread = NULL;
597 }
598 }
599
604 byte SlReadByte()
605 {
606 return _sl.reader->ReadByte();
607 }
608
613 void SlWriteByte(byte b)
614 {
615 _sl.dumper->WriteByte(b);
616 }
617
618 static inline int SlReadUint16()
619 {
620 int x = SlReadByte() << 8;
621 return x | SlReadByte();
622 }
623
624 static inline uint32 SlReadUint32()
625 {
626 uint32 x = SlReadUint16() << 16;
627 return x | SlReadUint16();
628 }
629
630 static inline uint64 SlReadUint64()
631 {
632 uint32 x = SlReadUint32();
633 uint32 y = SlReadUint32();
634 return (uint64)x << 32 | y;
635 }
636
637 static inline void SlWriteUint16(uint16 v)
638 {
639 SlWriteByte(GB(v, 8, 8));
640 SlWriteByte(GB(v, 0, 8));
641 }
642
643 static inline void SlWriteUint32(uint32 v)
644 {
645 SlWriteUint16(GB(v, 16, 16));
646 SlWriteUint16(GB(v, 0, 16));
647 }
648
649 static inline void SlWriteUint64(uint64 x)
650 {
651 SlWriteUint32((uint32)(x >> 32));
652 SlWriteUint32((uint32)x);
653 }
654
660 static inline void SlSkipBytes(size_t length)
661 {
662 for (; length != 0; length--) SlReadByte();
663 }
664
674 static uint SlReadSimpleGamma()
675 {
676 uint i = SlReadByte();
677 if (HasBit(i, 7)) {
678 i &= ~0x80;
679 if (HasBit(i, 6)) {
680 i &= ~0x40;
681 if (HasBit(i, 5)) {
682 i &= ~0x20;
683 if (HasBit(i, 4)) {
684 i &= ~0x10;
685 if (HasBit(i, 3)) {
686 SlErrorCorrupt("Unsupported gamma");
687 }
688 i = SlReadByte(); // 32 bits only.
689 }
690 i = (i << 8) | SlReadByte();
691 }
692 i = (i << 8) | SlReadByte();
693 }
694 i = (i << 8) | SlReadByte();
695 }
696 return i;
697 }
698
716 static void SlWriteSimpleGamma(size_t i)
717 {
718 if (i >= (1 << 7)) {
719 if (i >= (1 << 14)) {
720 if (i >= (1 << 21)) {
721 if (i >= (1 << 28)) {
722 assert(i <= UINT32_MAX); // We can only support 32 bits for now.
723 SlWriteByte((byte)(0xF0));
724 SlWriteByte((byte)(i >> 24));
725 } else {
726 SlWriteByte((byte)(0xE0 | (i >> 24)));
727 }
728 SlWriteByte((byte)(i >> 16));
729 } else {
730 SlWriteByte((byte)(0xC0 | (i >> 16)));
731 }
732 SlWriteByte((byte)(i >> 8));
733 } else {
734 SlWriteByte((byte)(0x80 | (i >> 8)));
735 }
736 }
737 SlWriteByte((byte)i);
738 }
739
741 static inline uint SlGetGammaLength(size_t i)
742 {
743 return 1 + (i >= (1 << 7)) + (i >= (1 << 14)) + (i >= (1 << 21)) + (i >= (1 << 28));
744 }
745
746 static inline uint SlReadSparseIndex()
747 {
748 return SlReadSimpleGamma();
749 }
750
751 static inline void SlWriteSparseIndex(uint index)
752 {
753 SlWriteSimpleGamma(index);
754 }
755
756 static inline uint SlReadArrayLength()
757 {
758 return SlReadSimpleGamma();
759 }
760
761 static inline void SlWriteArrayLength(size_t length)
762 {
763 SlWriteSimpleGamma(length);
764 }
765
766 static inline uint SlGetArrayLength(size_t length)
767 {
768 return SlGetGammaLength(length);
769 }
770
777 static inline uint SlCalcConvMemLen(VarType conv)
778 {
779 static const byte conv_mem_size[] = {1, 1, 1, 2, 2, 4, 4, 8, 8, 0};
780 byte length = GB(conv, 4, 4);
781
782 switch (length << 4) {
783 case SLE_VAR_STRB:
784 case SLE_VAR_STRBQ:
785 case SLE_VAR_STR:
786 case SLE_VAR_STRQ:
787 return SlReadArrayLength();
788
789 default:
790 assert(length < lengthof(conv_mem_size));
791 return conv_mem_size[length];
792 }
793 }
794
801 static inline byte SlCalcConvFileLen(VarType conv)
802 {
803 static const byte conv_file_size[] = {1, 1, 2, 2, 4, 4, 8, 8, 2};
804 byte length = GB(conv, 0, 4);
805 assert(length < lengthof(conv_file_size));
806 return conv_file_size[length];
807 }
808
810 static inline size_t SlCalcRefLen()
811 {
812 return IsSavegameVersionBefore(69) ? 2 : 4;
813 }
814
815 void SlSetArrayIndex(uint index)
816 {
817 _sl.need_length = NL_WANTLENGTH;
818 _sl.array_index = index;
819 }
820
821 static size_t _next_offs;
822
827 int SlIterateArray()
828 {
829 int index;
830
831 /* After reading in the whole array inside the loop
832 * we must have read in all the data, so we must be at end of current block. */
833 if (_next_offs != 0 && _sl.reader->GetSize() != _next_offs) SlErrorCorrupt("Invalid chunk size");
834
835 for (;;) {
836 uint length = SlReadArrayLength();
837 if (length == 0) {
838 _next_offs = 0;
839 return -1;
840 }
841
842 _sl.obj_len = --length;
843 _next_offs = _sl.reader->GetSize() + length;
844
845 switch (_sl.block_mode) {
846 case CH_SPARSE_ARRAY: index = (int)SlReadSparseIndex(); break;
847 case CH_ARRAY: index = _sl.array_index++; break;
848 default:
849 DEBUG(sl, 0, "SlIterateArray error");
850 return -1; // error
851 }
852
853 if (length != 0) return index;
854 }
855 }
856
860 void SlSkipArray()
861 {
862 while (SlIterateArray() != -1) {
863 SlSkipBytes(_next_offs - _sl.reader->GetSize());
864 }
865 }
866
872 void SlSetLength(size_t length)
873 {
874 assert(_sl.action == SLA_SAVE);
875
876 switch (_sl.need_length) {
877 case NL_WANTLENGTH:
878 _sl.need_length = NL_NONE;
879 switch (_sl.block_mode) {
880 case CH_RIFF:
881 /* Ugly encoding of >16M RIFF chunks
882 * The lower 24 bits are normal
883 * The uppermost 4 bits are bits 24:27 */
884 assert(length < (1 << 28));
885 SlWriteUint32((uint32)((length & 0xFFFFFF) | ((length >> 24) << 28)));
886 break;
887 case CH_ARRAY:
888 assert(_sl.last_array_index <= _sl.array_index);
889 while (++_sl.last_array_index <= _sl.array_index) {
890 SlWriteArrayLength(1);
891 }
892 SlWriteArrayLength(length + 1);
893 break;
894 case CH_SPARSE_ARRAY:
895 SlWriteArrayLength(length + 1 + SlGetArrayLength(_sl.array_index)); // Also include length of sparse index.
896 SlWriteSparseIndex(_sl.array_index);
897 break;
898 default: NOT_REACHED();
899 }
900 break;
901
902 case NL_CALCLENGTH:
903 _sl.obj_len += (int)length;
904 break;
905
906 default: NOT_REACHED();
907 }
908 }
909
916 static void SlCopyBytes(void *ptr, size_t length)
917 {
918 byte *p = (byte *)ptr;
919
920 switch (_sl.action) {
921 case SLA_LOAD_CHECK:
922 case SLA_LOAD:
923 for (; length != 0; length--) *p++ = SlReadByte();
924 break;
925 case SLA_SAVE:
926 for (; length != 0; length--) SlWriteByte(*p++);
927 break;
928 default: NOT_REACHED();
929 }
930 }
931
933 size_t SlGetFieldLength()
934 {
935 return _sl.obj_len;
936 }
937
945 int64 ReadValue(const void *ptr, VarType conv)
946 {
947 switch (GetVarMemType(conv)) {
948 case SLE_VAR_BL: return (*(const bool *)ptr != 0);
949 case SLE_VAR_I8: return *(const int8 *)ptr;
950 case SLE_VAR_U8: return *(const byte *)ptr;
951 case SLE_VAR_I16: return *(const int16 *)ptr;
952 case SLE_VAR_U16: return *(const uint16*)ptr;
953 case SLE_VAR_I32: return *(const int32 *)ptr;
954 case SLE_VAR_U32: return *(const uint32*)ptr;
955 case SLE_VAR_I64: return *(const int64 *)ptr;
956 case SLE_VAR_U64: return *(const uint64*)ptr;
957 case SLE_VAR_NULL:return 0;
958 default: NOT_REACHED();
959 }
960 }
961
969 void WriteValue(void *ptr, VarType conv, int64 val)
970 {
971 switch (GetVarMemType(conv)) {
972 case SLE_VAR_BL: *(bool *)ptr = (val != 0); break;
973 case SLE_VAR_I8: *(int8 *)ptr = val; break;
974 case SLE_VAR_U8: *(byte *)ptr = val; break;
975 case SLE_VAR_I16: *(int16 *)ptr = val; break;
976 case SLE_VAR_U16: *(uint16*)ptr = val; break;
977 case SLE_VAR_I32: *(int32 *)ptr = val; break;
978 case SLE_VAR_U32: *(uint32*)ptr = val; break;
979 case SLE_VAR_I64: *(int64 *)ptr = val; break;
980 case SLE_VAR_U64: *(uint64*)ptr = val; break;
981 case SLE_VAR_NAME: *(char**)ptr = CopyFromOldName(val); break;
982 case SLE_VAR_NULL: break;
983 default: NOT_REACHED();
984 }
985 }
986
995 static void SlSaveLoadConv(void *ptr, VarType conv)
996 {
997 switch (_sl.action) {
998 case SLA_SAVE: {
999 int64 x = ReadValue(ptr, conv);
1000
1001 /* Write the value to the file and check if its value is in the desired range */
1002 switch (GetVarFileType(conv)) {
1003 case SLE_FILE_I8: assert(x >= -128 && x <= 127); SlWriteByte(x);break;
1004 case SLE_FILE_U8: assert(x >= 0 && x <= 255); SlWriteByte(x);break;
1005 case SLE_FILE_I16:assert(x >= -32768 && x <= 32767); SlWriteUint16(x);break;
1006 case SLE_FILE_STRINGID:
1007 case SLE_FILE_U16:assert(x >= 0 && x <= 65535); SlWriteUint16(x);break;
1008 case SLE_FILE_I32:
1009 case SLE_FILE_U32: SlWriteUint32((uint32)x);break;
1010 case SLE_FILE_I64:
1011 case SLE_FILE_U64: SlWriteUint64(x);break;
1012 default: NOT_REACHED();
1013 }
1014 break;
1015 }
1016 case SLA_LOAD_CHECK:
1017 case SLA_LOAD: {
1018 int64 x;
1019 /* Read a value from the file */
1020 switch (GetVarFileType(conv)) {
1021 case SLE_FILE_I8: x = (int8 )SlReadByte(); break;
1022 case SLE_FILE_U8: x = (byte )SlReadByte(); break;
1023 case SLE_FILE_I16: x = (int16 )SlReadUint16(); break;
1024 case SLE_FILE_U16: x = (uint16)SlReadUint16(); break;
1025 case SLE_FILE_I32: x = (int32 )SlReadUint32(); break;
1026 case SLE_FILE_U32: x = (uint32)SlReadUint32(); break;
1027 case SLE_FILE_I64: x = (int64 )SlReadUint64(); break;
1028 case SLE_FILE_U64: x = (uint64)SlReadUint64(); break;
1029 case SLE_FILE_STRINGID: x = RemapOldStringID((uint16)SlReadUint16()); break;
1030 default: NOT_REACHED();
1031 }
1032
1033 /* Write The value to the struct. These ARE endian safe. */
1034 WriteValue(ptr, conv, x);
1035 break;
1036 }
1037 case SLA_PTRS: break;
1038 case SLA_NULL: break;
1039 default: NOT_REACHED();
1040 }
1041 }
1042
1052 static inline size_t SlCalcNetStringLen(const char *ptr, size_t length)
1053 {
1054 if (ptr == NULL) return 0;
1055 return min(strlen(ptr), length - 1);
1056 }
1057
1067 static inline size_t SlCalcStringLen(const void *ptr, size_t length, VarType conv)
1068 {
1069 size_t len;
1070 const char *str;
1071
1072 switch (GetVarMemType(conv)) {
1073 default: NOT_REACHED();
1074 case SLE_VAR_STR:
1075 case SLE_VAR_STRQ:
1076 str = *(const char * const *)ptr;
1077 len = SIZE_MAX;
1078 break;
1079 case SLE_VAR_STRB:
1080 case SLE_VAR_STRBQ:
1081 str = (const char *)ptr;
1082 len = length;
1083 break;
1084 }
1085
1086 len = SlCalcNetStringLen(str, len);
1087 return len + SlGetArrayLength(len); // also include the length of the index
1088 }
1089
1096 static void SlString(void *ptr, size_t length, VarType conv)
1097 {
1098 switch (_sl.action) {
1099 case SLA_SAVE: {
1100 size_t len;
1101 switch (GetVarMemType(conv)) {
1102 default: NOT_REACHED();
1103 case SLE_VAR_STRB:
1104 case SLE_VAR_STRBQ:
1105 len = SlCalcNetStringLen((char *)ptr, length);
1106 break;
1107 case SLE_VAR_STR:
1108 case SLE_VAR_STRQ:
1109 ptr = *(char **)ptr;
1110 len = SlCalcNetStringLen((char *)ptr, SIZE_MAX);
1111 break;
1112 }
1113
1114 SlWriteArrayLength(len);
1115 SlCopyBytes(ptr, len);
1116 break;
1117 }
1118 case SLA_LOAD_CHECK:
1119 case SLA_LOAD: {
1120 size_t len = SlReadArrayLength();
1121
1122 switch (GetVarMemType(conv)) {
1123 default: NOT_REACHED();
1124 case SLE_VAR_STRB:
1125 case SLE_VAR_STRBQ:
1126 if (len >= length) {
1127 DEBUG(sl, 1, "String length in savegame is bigger than buffer, truncating");
1128 SlCopyBytes(ptr, length);
1129 SlSkipBytes(len - length);
1130 len = length - 1;
1131 } else {
1132 SlCopyBytes(ptr, len);
1133 }
1134 break;
1135 case SLE_VAR_STR:
1136 case SLE_VAR_STRQ: // Malloc'd string, free previous incarnation, and allocate
1137 free(*(char **)ptr);
1138 if (len == 0) {
1139 *(char **)ptr = NULL;
1140 return;
1141 } else {
1142 *(char **)ptr = MallocT<char>(len + 1); // terminating '\0'
1143 ptr = *(char **)ptr;
1144 SlCopyBytes(ptr, len);
1145 }
1146 break;
1147 }
1148
1149 ((char *)ptr)[len] = '\0'; // properly terminate the string
1150 StringValidationSettings settings = SVS_REPLACE_WITH_QUESTION_MARK;
1151 if ((conv & SLF_ALLOW_CONTROL) != 0) {
1152 settings = settings | SVS_ALLOW_CONTROL_CODE;
1153 if (IsSavegameVersionBefore(169)) {
1154 str_fix_scc_encoded((char *)ptr, (char *)ptr + len);
1155 }
1156 }
1157 if ((conv & SLF_ALLOW_NEWLINE) != 0) {
1158 settings = settings | SVS_ALLOW_NEWLINE;
1159 }
1160 str_validate((char *)ptr, (char *)ptr + len, settings);
1161 break;
1162 }
1163 case SLA_PTRS: break;
1164 case SLA_NULL: break;
1165 default: NOT_REACHED();
1166 }
1167 }
1168
1174 static inline size_t SlCalcArrayLen(size_t length, VarType conv)
1175 {
1176 return SlCalcConvFileLen(conv) * length;
1177 }
1178
1185 void SlArray(void *array, size_t length, VarType conv)
1186 {
1187 if (_sl.action == SLA_PTRS || _sl.action == SLA_NULL) return;
1188
1189 /* Automatically calculate the length? */
1190 if (_sl.need_length != NL_NONE) {
1191 SlSetLength(SlCalcArrayLen(length, conv));
1192 /* Determine length only? */
1193 if (_sl.need_length == NL_CALCLENGTH) return;
1194 }
1195
1196 /* NOTICE - handle some buggy stuff, in really old versions everything was saved
1197 * as a byte-type. So detect this, and adjust array size accordingly */
1198 if (_sl.action != SLA_SAVE && _sl_version == 0) {
1199 /* all arrays except difficulty settings */
1200 if (conv == SLE_INT16 || conv == SLE_UINT16 || conv == SLE_STRINGID ||
1201 conv == SLE_INT32 || conv == SLE_UINT32) {
1202 SlCopyBytes(array, length * SlCalcConvFileLen(conv));
1203 return;
1204 }
1205 /* used for conversion of Money 32bit->64bit */
1206 if (conv == (SLE_FILE_I32 | SLE_VAR_I64)) {
1207 for (uint i = 0; i < length; i++) {
1208 ((int64*)array)[i] = (int32)BSWAP32(SlReadUint32());
1209 }
1210 return;
1211 }
1212 }
1213
1214 /* If the size of elements is 1 byte both in file and memory, no special
1215 * conversion is needed, use specialized copy-copy function to speed up things */
1216 if (conv == SLE_INT8 || conv == SLE_UINT8) {
1217 SlCopyBytes(array, length);
1218 } else {
1219 byte *a = (byte*)array;
1220 byte mem_size = SlCalcConvMemLen(conv);
1221
1222 for (; length != 0; length --) {
1223 SlSaveLoadConv(a, conv);
1224 a += mem_size; // get size
1225 }
1226 }
1227 }
1228
1229
1240 static size_t ReferenceToInt(const void *obj, SLRefType rt)
1241 {
1242 assert(_sl.action == SLA_SAVE);
1243
1244 if (obj == NULL) return 0;
1245
1246 switch (rt) {
1247 case REF_VEHICLE_OLD: // Old vehicles we save as new ones
1248 case REF_VEHICLE: return ((const Vehicle*)obj)->index + 1;
1249 case REF_STATION: return ((const Station*)obj)->index + 1;
1250 case REF_TOWN: return ((const Town*)obj)->index + 1;
1251 case REF_ORDER: return ((const Order*)obj)->index + 1;
1252 case REF_ROADSTOPS: return ((const RoadStop*)obj)->index + 1;
1253 case REF_ENGINE_RENEWS: return ((const EngineRenew*)obj)->index + 1;
1254 case REF_CARGO_PACKET: return ((const CargoPacket*)obj)->index + 1;
1255 case REF_ORDERLIST: return ((const OrderList*)obj)->index + 1;
1256 case REF_STORAGE: return ((const PersistentStorage*)obj)->index + 1;
1257 case REF_LINK_GRAPH: return ((const LinkGraph*)obj)->index + 1;
1258 case REF_LINK_GRAPH_JOB: return ((const LinkGraphJob*)obj)->index + 1;
1259 default: NOT_REACHED();
1260 }
1261 }
1262
1273 static void *IntToReference(size_t index, SLRefType rt)
1274 {
1275 assert_compile(sizeof(size_t) <= sizeof(void *));
1276
1277 assert(_sl.action == SLA_PTRS);
1278
1279 /* After version 4.3 REF_VEHICLE_OLD is saved as REF_VEHICLE,
1280 * and should be loaded like that */
1281 if (rt == REF_VEHICLE_OLD && !IsSavegameVersionBefore(4, 4)) {
1282 rt = REF_VEHICLE;
1283 }
1284
1285 /* No need to look up NULL pointers, just return immediately */
1286 if (index == (rt == REF_VEHICLE_OLD ? 0xFFFF : 0)) return NULL;
1287
1288 /* Correct index. Old vehicles were saved differently:
1289 * invalid vehicle was 0xFFFF, now we use 0x0000 for everything invalid. */
1290 if (rt != REF_VEHICLE_OLD) index--;
1291
1292 switch (rt) {
1293 case REF_ORDERLIST:
1294 if (OrderList::IsValidID(index)) return OrderList::Get(index);
1295 SlErrorCorrupt("Referencing invalid OrderList");
1296
1297 case REF_ORDER:
1298 if (Order::IsValidID(index)) return Order::Get(index);
1299 /* in old versions, invalid order was used to mark end of order list */
1300 if (IsSavegameVersionBefore(5, 2)) return NULL;
1301 SlErrorCorrupt("Referencing invalid Order");
1302
1303 case REF_VEHICLE_OLD:
1304 case REF_VEHICLE:
1305 if (Vehicle::IsValidID(index)) return Vehicle::Get(index);
1306 SlErrorCorrupt("Referencing invalid Vehicle");
1307
1308 case REF_STATION:
1309 if (Station::IsValidID(index)) return Station::Get(index);
1310 SlErrorCorrupt("Referencing invalid Station");
1311
1312 case REF_TOWN:
1313 if (Town::IsValidID(index)) return Town::Get(index);
1314 SlErrorCorrupt("Referencing invalid Town");
1315
1316 case REF_ROADSTOPS:
1317 if (RoadStop::IsValidID(index)) return RoadStop::Get(index);
1318 SlErrorCorrupt("Referencing invalid RoadStop");
1319
1320 case REF_ENGINE_RENEWS:
1321 if (EngineRenew::IsValidID(index)) return EngineRenew::Get(index);
1322 SlErrorCorrupt("Referencing invalid EngineRenew");
1323
1324 case REF_CARGO_PACKET:
1325 if (CargoPacket::IsValidID(index)) return CargoPacket::Get(index);
1326 SlErrorCorrupt("Referencing invalid CargoPacket");
1327
1328 case REF_STORAGE:
1329 if (PersistentStorage::IsValidID(index)) return PersistentStorage::Get(index);
1330 SlErrorCorrupt("Referencing invalid PersistentStorage");
1331
1332 case REF_LINK_GRAPH:
1333 if (LinkGraph::IsValidID(index)) return LinkGraph::Get(index);
1334 SlErrorCorrupt("Referencing invalid LinkGraph");
1335
1336 case REF_LINK_GRAPH_JOB:
1337 if (LinkGraphJob::IsValidID(index)) return LinkGraphJob::Get(index);
1338 SlErrorCorrupt("Referencing invalid LinkGraphJob");
1339
1340 default: NOT_REACHED();
1341 }
1342 }
1343
1348 static inline size_t SlCalcListLen(const void *list)
1349 {
1350 const std::list<void *> *l = (const std::list<void *> *) list;
1351
1352 int type_size = IsSavegameVersionBefore(69) ? 2 : 4;
1353 /* Each entry is saved as type_size bytes, plus type_size bytes are used for the length
1354 * of the list */
1355 return l->size() * type_size + type_size;
1356 }
1357
1358
1364 static void SlList(void *list, SLRefType conv)
1365 {
1366 /* Automatically calculate the length? */
1367 if (_sl.need_length != NL_NONE) {
1368 SlSetLength(SlCalcListLen(list));
1369 /* Determine length only? */
1370 if (_sl.need_length == NL_CALCLENGTH) return;
1371 }
1372
1373 typedef std::list<void *> PtrList;
1374 PtrList *l = (PtrList *)list;
1375
1376 switch (_sl.action) {
1377 case SLA_SAVE: {
1378 SlWriteUint32((uint32)l->size());
1379
1380 PtrList::iterator iter;
1381 for (iter = l->begin(); iter != l->end(); ++iter) {
1382 void *ptr = *iter;
1383 SlWriteUint32((uint32)ReferenceToInt(ptr, conv));
1384 }
1385 break;
1386 }
1387 case SLA_LOAD_CHECK:
1388 case SLA_LOAD: {
1389 size_t length = IsSavegameVersionBefore(69) ? SlReadUint16() : SlReadUint32();
1390
1391 /* Load each reference and push to the end of the list */
1392 for (size_t i = 0; i < length; i++) {
1393 size_t data = IsSavegameVersionBefore(69) ? SlReadUint16() : SlReadUint32();
1394 l->push_back((void *)data);
1395 }
1396 break;
1397 }
1398 case SLA_PTRS: {
1399 PtrList temp = *l;
1400
1401 l->clear();
1402 PtrList::iterator iter;
1403 for (iter = temp.begin(); iter != temp.end(); ++iter) {
1404 void *ptr = IntToReference((size_t)*iter, conv);
1405 l->push_back(ptr);
1406 }
1407 break;
1408 }
1409 case SLA_NULL:
1410 l->clear();
1411 break;
1412 default: NOT_REACHED();
1413 }
1414 }
1415
1416
1418 static inline bool SlIsObjectValidInSavegame(const SaveLoad *sld)
1419 {
1420 if (_sl_version < sld->version_from || _sl_version > sld->version_to) return false;
1421 if (sld->conv & SLF_NOT_IN_SAVE) return false;
1422
1423 return true;
1424 }
1425
1431 static inline bool SlSkipVariableOnLoad(const SaveLoad *sld)
1432 {
1433 if ((sld->conv & SLF_NO_NETWORK_SYNC) && _sl.action != SLA_SAVE && _networking && !_network_server) {
1434 SlSkipBytes(SlCalcConvMemLen(sld->conv) * sld->length);
1435 return true;
1436 }
1437
1438 return false;
1439 }
1440
1447 size_t SlCalcObjLength(const void *object, const SaveLoad *sld)
1448 {
1449 size_t length = 0;
1450
1451 /* Need to determine the length and write a length tag. */
1452 for (; sld->cmd != SL_END; sld++) {
1453 length += SlCalcObjMemberLength(object, sld);
1454 }
1455 return length;
1456 }
1457
1458 size_t SlCalcObjMemberLength(const void *object, const SaveLoad *sld)
1459 {
1460 assert(_sl.action == SLA_SAVE);
1461
1462 switch (sld->cmd) {
1463 case SL_VAR:
1464 case SL_REF:
1465 case SL_ARR:
1466 case SL_STR:
1467 case SL_LST:
1468 /* CONDITIONAL saveload types depend on the savegame version */
1469 if (!SlIsObjectValidInSavegame(sld)) break;
1470
1471 switch (sld->cmd) {
1472 case SL_VAR: return SlCalcConvFileLen(sld->conv);
1473 case SL_REF: return SlCalcRefLen();
1474 case SL_ARR: return SlCalcArrayLen(sld->length, sld->conv);
1475 case SL_STR: return SlCalcStringLen(GetVariableAddress(object, sld), sld->length, sld->conv);
1476 case SL_LST: return SlCalcListLen(GetVariableAddress(object, sld));
1477 default: NOT_REACHED();
1478 }
1479 break;
1480 case SL_WRITEBYTE: return 1; // a byte is logically of size 1
1481 case SL_VEH_INCLUDE: return SlCalcObjLength(object, GetVehicleDescription(VEH_END));
1482 case SL_ST_INCLUDE: return SlCalcObjLength(object, GetBaseStationDescription());
1483 default: NOT_REACHED();
1484 }
1485 return 0;
1486 }
1487
1488 #ifdef OTTD_ASSERT
1489
1495 static bool IsVariableSizeRight(const SaveLoad *sld)
1496 {
1497 switch (sld->cmd) {
1498 case SL_VAR:
1499 switch (GetVarMemType(sld->conv)) {
1500 case SLE_VAR_BL:
1501 return sld->size == sizeof(bool);
1502 case SLE_VAR_I8:
1503 case SLE_VAR_U8:
1504 return sld->size == sizeof(int8);
1505 case SLE_VAR_I16:
1506 case SLE_VAR_U16:
1507 return sld->size == sizeof(int16);
1508 case SLE_VAR_I32:
1509 case SLE_VAR_U32:
1510 return sld->size == sizeof(int32);
1511 case SLE_VAR_I64:
1512 case SLE_VAR_U64:
1513 return sld->size == sizeof(int64);
1514 default:
1515 return sld->size == sizeof(void *);
1516 }
1517 case SL_REF:
1518 /* These should all be pointer sized. */
1519 return sld->size == sizeof(void *);
1520
1521 case SL_STR:
1522 /* These should be pointer sized, or fixed array. */
1523 return sld->size == sizeof(void *) || sld->size == sld->length;
1524
1525 default:
1526 return true;
1527 }
1528 }
1529
1530 #endif /* OTTD_ASSERT */
1531
1532 bool SlObjectMember(void *ptr, const SaveLoad *sld)
1533 {
1534 #ifdef OTTD_ASSERT
1535 assert(IsVariableSizeRight(sld));
1536 #endif
1537
1538 VarType conv = GB(sld->conv, 0, 8);
1539 switch (sld->cmd) {
1540 case SL_VAR:
1541 case SL_REF:
1542 case SL_ARR:
1543 case SL_STR:
1544 case SL_LST:
1545 /* CONDITIONAL saveload types depend on the savegame version */
1546 if (!SlIsObjectValidInSavegame(sld)) return false;
1547 if (SlSkipVariableOnLoad(sld)) return false;
1548
1549 switch (sld->cmd) {
1550 case SL_VAR: SlSaveLoadConv(ptr, conv); break;
1551 case SL_REF: // Reference variable, translate
1552 switch (_sl.action) {
1553 case SLA_SAVE:
1554 SlWriteUint32((uint32)ReferenceToInt(*(void **)ptr, (SLRefType)conv));
1555 break;
1556 case SLA_LOAD_CHECK:
1557 case SLA_LOAD:
1558 *(size_t *)ptr = IsSavegameVersionBefore(69) ? SlReadUint16() : SlReadUint32();
1559 break;
1560 case SLA_PTRS:
1561 *(void **)ptr = IntToReference(*(size_t *)ptr, (SLRefType)conv);
1562 break;
1563 case SLA_NULL:
1564 *(void **)ptr = NULL;
1565 break;
1566 default: NOT_REACHED();
1567 }
1568 break;
1569 case SL_ARR: SlArray(ptr, sld->length, conv); break;
1570 case SL_STR: SlString(ptr, sld->length, sld->conv); break;
1571 case SL_LST: SlList(ptr, (SLRefType)conv); break;
1572 default: NOT_REACHED();
1573 }
1574 break;
1575
1576 /* SL_WRITEBYTE translates a value of a variable to another one upon
1577 * saving or loading.
1578 * XXX - variable renaming abuse
1579 * game_value: the value of the variable ingame is abused by sld->version_from
1580 * file_value: the value of the variable in the savegame is abused by sld->version_to */
1581 case SL_WRITEBYTE:
1582 switch (_sl.action) {
1583 case SLA_SAVE: SlWriteByte(sld->version_to); break;
1584 case SLA_LOAD_CHECK:
1585 case SLA_LOAD: *(byte *)ptr = sld->version_from; break;
1586 case SLA_PTRS: break;
1587 case SLA_NULL: break;
1588 default: NOT_REACHED();
1589 }
1590 break;
1591
1592 /* SL_VEH_INCLUDE loads common code for vehicles */
1593 case SL_VEH_INCLUDE:
1594 SlObject(ptr, GetVehicleDescription(VEH_END));
1595 break;
1596
1597 case SL_ST_INCLUDE:
1598 SlObject(ptr, GetBaseStationDescription());
1599 break;
1600
1601 default: NOT_REACHED();
1602 }
1603 return true;
1604 }
1605
1611 void SlObject(void *object, const SaveLoad *sld)
1612 {
1613 /* Automatically calculate the length? */
1614 if (_sl.need_length != NL_NONE) {
1615 SlSetLength(SlCalcObjLength(object, sld));
1616 if (_sl.need_length == NL_CALCLENGTH) return;
1617 }
1618
1619 for (; sld->cmd != SL_END; sld++) {
1620 void *ptr = sld->global ? sld->address : GetVariableAddress(object, sld);
1621 SlObjectMember(ptr, sld);
1622 }
1623 }
1624
1629 void SlGlobList(const SaveLoadGlobVarList *sldg)
1630 {
1631 SlObject(NULL, (const SaveLoad*)sldg);
1632 }
1633
1639 void SlAutolength(AutolengthProc *proc, void *arg)
1640 {
1641 size_t offs;
1642
1643 assert(_sl.action == SLA_SAVE);
1644
1645 /* Tell it to calculate the length */
1646 _sl.need_length = NL_CALCLENGTH;
1647 _sl.obj_len = 0;
1648 proc(arg);
1649
1650 /* Setup length */
1651 _sl.need_length = NL_WANTLENGTH;
1652 SlSetLength(_sl.obj_len);
1653
1654 offs = _sl.dumper->GetSize() + _sl.obj_len;
1655
1656 /* And write the stuff */
1657 proc(arg);
1658
1659 if (offs != _sl.dumper->GetSize()) SlErrorCorrupt("Invalid chunk size");
1660 }
1661
1666 static void SlLoadChunk(const ChunkHandler *ch)
1667 {
1668 byte m = SlReadByte();
1669 size_t len;
1670 size_t endoffs;
1671
1672 _sl.block_mode = m;
1673 _sl.obj_len = 0;
1674
1675 switch (m) {
1676 case CH_ARRAY:
1677 _sl.array_index = 0;
1678 ch->load_proc();
1679 if (_next_offs != 0) SlErrorCorrupt("Invalid array length");
1680 break;
1681 case CH_SPARSE_ARRAY:
1682 ch->load_proc();
1683 if (_next_offs != 0) SlErrorCorrupt("Invalid array length");
1684 break;
1685 default:
1686 if ((m & 0xF) == CH_RIFF) {
1687 /* Read length */
1688 len = (SlReadByte() << 16) | ((m >> 4) << 24);
1689 len += SlReadUint16();
1690 _sl.obj_len = len;
1691 endoffs = _sl.reader->GetSize() + len;
1692 ch->load_proc();
1693 if (_sl.reader->GetSize() != endoffs) SlErrorCorrupt("Invalid chunk size");
1694 } else {
1695 SlErrorCorrupt("Invalid chunk type");
1696 }
1697 break;
1698 }
1699 }
1700
1706 static void SlLoadCheckChunk(const ChunkHandler *ch)
1707 {
1708 byte m = SlReadByte();
1709 size_t len;
1710 size_t endoffs;
1711
1712 _sl.block_mode = m;
1713 _sl.obj_len = 0;
1714
1715 switch (m) {
1716 case CH_ARRAY:
1717 _sl.array_index = 0;
1718 if (ch->load_check_proc) {
1719 ch->load_check_proc();
1720 } else {
1721 SlSkipArray();
1722 }
1723 break;
1724 case CH_SPARSE_ARRAY:
1725 if (ch->load_check_proc) {
1726 ch->load_check_proc();
1727 } else {
1728 SlSkipArray();
1729 }
1730 break;
1731 default:
1732 if ((m & 0xF) == CH_RIFF) {
1733 /* Read length */
1734 len = (SlReadByte() << 16) | ((m >> 4) << 24);
1735 len += SlReadUint16();
1736 _sl.obj_len = len;
1737 endoffs = _sl.reader->GetSize() + len;
1738 if (ch->load_check_proc) {
1739 ch->load_check_proc();
1740 } else {
1741 SlSkipBytes(len);
1742 }
1743 if (_sl.reader->GetSize() != endoffs) SlErrorCorrupt("Invalid chunk size");
1744 } else {
1745 SlErrorCorrupt("Invalid chunk type");
1746 }
1747 break;
1748 }
1749 }
1750
1755 static ChunkSaveLoadProc *_stub_save_proc;
1756
1762 static inline void SlStubSaveProc2(void *arg)
1763 {
1764 _stub_save_proc();
1765 }
1766
1772 static void SlStubSaveProc()
1773 {
1774 SlAutolength(SlStubSaveProc2, NULL);
1775 }
1776
1782 static void SlSaveChunk(const ChunkHandler *ch)
1783 {
1784 ChunkSaveLoadProc *proc = ch->save_proc;
1785
1786 /* Don't save any chunk information if there is no save handler. */
1787 if (proc == NULL) return;
1788
1789 SlWriteUint32(ch->id);
1790 DEBUG(sl, 2, "Saving chunk %c%c%c%c", ch->id >> 24, ch->id >> 16, ch->id >> 8, ch->id);
1791
1792 if (ch->flags & CH_AUTO_LENGTH) {
1793 /* Need to calculate the length. Solve that by calling SlAutoLength in the save_proc. */
1794 _stub_save_proc = proc;
1795 proc = SlStubSaveProc;
1796 }
1797
1798 _sl.block_mode = ch->flags & CH_TYPE_MASK;
1799 switch (ch->flags & CH_TYPE_MASK) {
1800 case CH_RIFF:
1801 _sl.need_length = NL_WANTLENGTH;
1802 proc();
1803 break;
1804 case CH_ARRAY:
1805 _sl.last_array_index = 0;
1806 SlWriteByte(CH_ARRAY);
1807 proc();
1808 SlWriteArrayLength(0); // Terminate arrays
1809 break;
1810 case CH_SPARSE_ARRAY:
1811 SlWriteByte(CH_SPARSE_ARRAY);
1812 proc();
1813 SlWriteArrayLength(0); // Terminate arrays
1814 break;
1815 default: NOT_REACHED();
1816 }
1817 }
1818
1820 static void SlSaveChunks()
1821 {
1822 FOR_ALL_CHUNK_HANDLERS(ch) {
1823 SlSaveChunk(ch);
1824 }
1825
1826 /* Terminator */
1827 SlWriteUint32(0);
1828 }
1829
1836 static const ChunkHandler *SlFindChunkHandler(uint32 id)
1837 {
1838 FOR_ALL_CHUNK_HANDLERS(ch) if (ch->id == id) return ch;
1839 return NULL;
1840 }
1841
1843 static void SlLoadChunks()
1844 {
1845 uint32 id;
1846 const ChunkHandler *ch;
1847
1848 for (id = SlReadUint32(); id != 0; id = SlReadUint32()) {
1849 DEBUG(sl, 2, "Loading chunk %c%c%c%c", id >> 24, id >> 16, id >> 8, id);
1850
1851 ch = SlFindChunkHandler(id);
1852 if (ch == NULL) SlErrorCorrupt("Unknown chunk type");
1853 SlLoadChunk(ch);
1854 }
1855 }
1856
1858 static void SlLoadCheckChunks()
1859 {
1860 uint32 id;
1861 const ChunkHandler *ch;
1862
1863 for (id = SlReadUint32(); id != 0; id = SlReadUint32()) {
1864 DEBUG(sl, 2, "Loading chunk %c%c%c%c", id >> 24, id >> 16, id >> 8, id);
1865
1866 ch = SlFindChunkHandler(id);
1867 if (ch == NULL) SlErrorCorrupt("Unknown chunk type");
1868 SlLoadCheckChunk(ch);
1869 }
1870 }
1871
1873 static void SlFixPointers()
1874 {
1875 _sl.action = SLA_PTRS;
1876
1877 DEBUG(sl, 1, "Fixing pointers");
1878
1879 FOR_ALL_CHUNK_HANDLERS(ch) {
1880 if (ch->ptrs_proc != NULL) {
1881 DEBUG(sl, 2, "Fixing pointers for %c%c%c%c", ch->id >> 24, ch->id >> 16, ch->id >> 8, ch->id);
1882 ch->ptrs_proc();
1883 }
1884 }
1885
1886 DEBUG(sl, 1, "All pointers fixed");
1887
1888 assert(_sl.action == SLA_PTRS);
1889 }
1890
1891
1893 struct FileReader : LoadFilter {
1894 FILE *file;
1895 long begin;
1896
1901 FileReader(FILE *file) : LoadFilter(NULL), file(file), begin(ftell(file))
1902 {
1903 }
1904
1906 ~FileReader()
1907 {
1908 if (this->file != NULL) fclose(this->file);
1909 this->file = NULL;
1910
1911 /* Make sure we don't double free. */
1912 _sl.sf = NULL;
1913 }
1914
1915 /* virtual */ size_t Read(byte *buf, size_t size)
1916 {
1917 /* We're in the process of shutting down, i.e. in "failure" mode. */
1918 if (this->file == NULL) return 0;
1919
1920 return fread(buf, 1, size, this->file);
1921 }
1922
1923 /* virtual */ void Reset()
1924 {
1925 clearerr(this->file);
1926 if (fseek(this->file, this->begin, SEEK_SET)) {
1927 DEBUG(sl, 1, "Could not reset the file reading");
1928 }
1929 }
1930 };
1931
1933 struct FileWriter : SaveFilter {
1934 FILE *file;
1935
1940 FileWriter(FILE *file) : SaveFilter(NULL), file(file)
1941 {
1942 }
1943
1945 ~FileWriter()
1946 {
1947 this->Finish();
1948
1949 /* Make sure we don't double free. */
1950 _sl.sf = NULL;
1951 }
1952
1953 /* virtual */ void Write(byte *buf, size_t size)
1954 {
1955 /* We're in the process of shutting down, i.e. in "failure" mode. */
1956 if (this->file == NULL) return;
1957
1958 if (fwrite(buf, 1, size, this->file) != size) SlError(STR_GAME_SAVELOAD_ERROR_FILE_NOT_WRITEABLE);
1959 }
1960
1961 /* virtual */ void Finish()
1962 {
1963 if (this->file != NULL) fclose(this->file);
1964 this->file = NULL;
1965 }
1966 };
1967
1968 /*******************************************
1969 ********** START OF LZO CODE **************
1970 *******************************************/
1971
1972 #ifdef WITH_LZO
1973 #include <lzo/lzo1x.h>
1974
1976 static const uint LZO_BUFFER_SIZE = 8192;
1977
1979 struct LZOLoadFilter : LoadFilter {
1984 LZOLoadFilter(LoadFilter *chain) : LoadFilter(chain)
1985 {
1986 if (lzo_init() != LZO_E_OK) SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, "cannot initialize decompressor");
1987 }
1988
1989 /* virtual */ size_t Read(byte *buf, size_t ssize)
1990 {
1991 assert(ssize >= LZO_BUFFER_SIZE);
1992
1993 /* Buffer size is from the LZO docs plus the chunk header size. */
1994 byte out[LZO_BUFFER_SIZE + LZO_BUFFER_SIZE / 16 + 64 + 3 + sizeof(uint32) * 2];
1995 uint32 tmp[2];
1996 uint32 size;
1997 lzo_uint len = ssize;
1998
1999 /* Read header*/
2000 if (this->chain->Read((byte*)tmp, sizeof(tmp)) != sizeof(tmp)) SlError(STR_GAME_SAVELOAD_ERROR_FILE_NOT_READABLE, "File read failed");
2001
2002 /* Check if size is bad */
2003 ((uint32*)out)[0] = size = tmp[1];
2004
2005 if (_sl_version != 0) {
2006 tmp[0] = TO_BE32(tmp[0]);
2007 size = TO_BE32(size);
2008 }
2009
2010 if (size >= sizeof(out)) SlErrorCorrupt("Inconsistent size");
2011
2012 /* Read block */
2013 if (this->chain->Read(out + sizeof(uint32), size) != size) SlError(STR_GAME_SAVELOAD_ERROR_FILE_NOT_READABLE);
2014
2015 /* Verify checksum */
2016 if (tmp[0] != lzo_adler32(0, out, size + sizeof(uint32))) SlErrorCorrupt("Bad checksum");
2017
2018 /* Decompress */
2019 int ret = lzo1x_decompress_safe(out + sizeof(uint32) * 1, size, buf, &len, NULL);
2020 if (ret != LZO_E_OK) SlError(STR_GAME_SAVELOAD_ERROR_FILE_NOT_READABLE);
2021 return len;
2022 }
2023 };
2024
2026 struct LZOSaveFilter : SaveFilter {
2032 LZOSaveFilter(SaveFilter *chain, byte compression_level) : SaveFilter(chain)
2033 {
2034 if (lzo_init() != LZO_E_OK) SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, "cannot initialize compressor");
2035 }
2036
2037 /* virtual */ void Write(byte *buf, size_t size)
2038 {
2039 const lzo_bytep in = buf;
2040 /* Buffer size is from the LZO docs plus the chunk header size. */
2041 byte out[LZO_BUFFER_SIZE + LZO_BUFFER_SIZE / 16 + 64 + 3 + sizeof(uint32) * 2];
2042 byte wrkmem[LZO1X_1_MEM_COMPRESS];
2043 lzo_uint outlen;
2044
2045 do {
2046 /* Compress up to LZO_BUFFER_SIZE bytes at once. */
2047 lzo_uint len = size > LZO_BUFFER_SIZE ? LZO_BUFFER_SIZE : (lzo_uint)size;
2048 lzo1x_1_compress(in, len, out + sizeof(uint32) * 2, &outlen, wrkmem);
2049 ((uint32*)out)[1] = TO_BE32((uint32)outlen);
2050 ((uint32*)out)[0] = TO_BE32(lzo_adler32(0, out + sizeof(uint32), outlen + sizeof(uint32)));
2051 this->chain->Write(out, outlen + sizeof(uint32) * 2);
2052
2053 /* Move to next data chunk. */
2054 size -= len;
2055 in += len;
2056 } while (size > 0);
2057 }
2058 };
2059
2060 #endif /* WITH_LZO */
2061
2062 /*********************************************
2063 ******** START OF NOCOMP CODE (uncompressed)*
2064 *********************************************/
2065
2067 struct NoCompLoadFilter : LoadFilter {
2072 NoCompLoadFilter(LoadFilter *chain) : LoadFilter(chain)
2073 {
2074 }
2075
2076 /* virtual */ size_t Read(byte *buf, size_t size)
2077 {
2078 return this->chain->Read(buf, size);
2079 }
2080 };
2081
2083 struct NoCompSaveFilter : SaveFilter {
2089 NoCompSaveFilter(SaveFilter *chain, byte compression_level) : SaveFilter(chain)
2090 {
2091 }
2092
2093 /* virtual */ void Write(byte *buf, size_t size)
2094 {
2095 this->chain->Write(buf, size);
2096 }
2097 };
2098
2099 /********************************************
2100 ********** START OF ZLIB CODE **************
2101 ********************************************/
2102
2103 #if defined(WITH_ZLIB)
2104 #include <zlib.h>
2105
2107 struct ZlibLoadFilter : LoadFilter {
2108 z_stream z;
2109 byte fread_buf[MEMORY_CHUNK_SIZE];
2110
2115 ZlibLoadFilter(LoadFilter *chain) : LoadFilter(chain)
2116 {
2117 memset(&this->z, 0, sizeof(this->z));
2118 if (inflateInit(&this->z) != Z_OK) SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, "cannot initialize decompressor");
2119 }
2120
2122 ~ZlibLoadFilter()
2123 {
2124 inflateEnd(&this->z);
2125 }
2126
2127 /* virtual */ size_t Read(byte *buf, size_t size)
2128 {
2129 this->z.next_out = buf;
2130 this->z.avail_out = (uint)size;
2131
2132 do {
2133 /* read more bytes from the file? */
2134 if (this->z.avail_in == 0) {
2135 this->z.next_in = this->fread_buf;
2136 this->z.avail_in = (uint)this->chain->Read(this->fread_buf, sizeof(this->fread_buf));
2137 }
2138
2139 /* inflate the data */
2140 int r = inflate(&this->z, 0);
2141 if (r == Z_STREAM_END) break;
2142
2143 if (r != Z_OK) SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, "inflate() failed");
2144 } while (this->z.avail_out != 0);
2145
2146 return size - this->z.avail_out;
2147 }
2148 };
2149
2151 struct ZlibSaveFilter : SaveFilter {
2152 z_stream z;
2153
2159 ZlibSaveFilter(SaveFilter *chain, byte compression_level) : SaveFilter(chain)
2160 {
2161 memset(&this->z, 0, sizeof(this->z));
2162 if (deflateInit(&this->z, compression_level) != Z_OK) SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, "cannot initialize compressor");
2163 }
2164
2166 ~ZlibSaveFilter()
2167 {
2168 deflateEnd(&this->z);
2169 }
2170
2177 void WriteLoop(byte *p, size_t len, int mode)
2178 {
2179 byte buf[MEMORY_CHUNK_SIZE]; // output buffer
2180 uint n;
2181 this->z.next_in = p;
2182 this->z.avail_in = (uInt)len;
2183 do {
2184 this->z.next_out = buf;
2185 this->z.avail_out = sizeof(buf);
2186
2194 int r = deflate(&this->z, mode);
2195
2196 /* bytes were emitted? */
2197 if ((n = sizeof(buf) - this->z.avail_out) != 0) {
2198 this->chain->Write(buf, n);
2199 }
2200 if (r == Z_STREAM_END) break;
2201
2202 if (r != Z_OK) SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, "zlib returned error code");
2203 } while (this->z.avail_in || !this->z.avail_out);
2204 }
2205
2206 /* virtual */ void Write(byte *buf, size_t size)
2207 {
2208 this->WriteLoop(buf, size, 0);
2209 }
2210
2211 /* virtual */ void Finish()
2212 {
2213 this->WriteLoop(NULL, 0, Z_FINISH);
2214 this->chain->Finish();
2215 }
2216 };
2217
2218 #endif /* WITH_ZLIB */
2219
2220 /********************************************
2221 ********** START OF LZMA CODE **************
2222 ********************************************/
2223
2224 #if defined(WITH_LZMA)
2225 #include <lzma.h>
2226
2233 static const lzma_stream _lzma_init = LZMA_STREAM_INIT;
2234
2236 struct LZMALoadFilter : LoadFilter {
2237 lzma_stream lzma;
2238 byte fread_buf[MEMORY_CHUNK_SIZE];
2239
2244 LZMALoadFilter(LoadFilter *chain) : LoadFilter(chain), lzma(_lzma_init)
2245 {
2246 /* Allow saves up to 256 MB uncompressed */
2247 if (lzma_auto_decoder(&this->lzma, 1 << 28, 0) != LZMA_OK) SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, "cannot initialize decompressor");
2248 }
2249
2251 ~LZMALoadFilter()
2252 {
2253 lzma_end(&this->lzma);
2254 }
2255
2256 /* virtual */ size_t Read(byte *buf, size_t size)
2257 {
2258 this->lzma.next_out = buf;
2259 this->lzma.avail_out = size;
2260
2261 do {
2262 /* read more bytes from the file? */
2263 if (this->lzma.avail_in == 0) {
2264 this->lzma.next_in = this->fread_buf;
2265 this->lzma.avail_in = this->chain->Read(this->fread_buf, sizeof(this->fread_buf));
2266 }
2267
2268 /* inflate the data */
2269 lzma_ret r = lzma_code(&this->lzma, LZMA_RUN);
2270 if (r == LZMA_STREAM_END) break;
2271 if (r != LZMA_OK) SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, "liblzma returned error code");
2272 } while (this->lzma.avail_out != 0);
2273
2274 return size - this->lzma.avail_out;
2275 }
2276 };
2277
2279 struct LZMASaveFilter : SaveFilter {
2280 lzma_stream lzma;
2281
2287 LZMASaveFilter(SaveFilter *chain, byte compression_level) : SaveFilter(chain), lzma(_lzma_init)
2288 {
2289 if (lzma_easy_encoder(&this->lzma, compression_level, LZMA_CHECK_CRC32) != LZMA_OK) SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, "cannot initialize compressor");
2290 }
2291
2293 ~LZMASaveFilter()
2294 {
2295 lzma_end(&this->lzma);
2296 }
2297
2304 void WriteLoop(byte *p, size_t len, lzma_action action)
2305 {
2306 byte buf[MEMORY_CHUNK_SIZE]; // output buffer
2307 size_t n;
2308 this->lzma.next_in = p;
2309 this->lzma.avail_in = len;
2310 do {
2311 this->lzma.next_out = buf;
2312 this->lzma.avail_out = sizeof(buf);
2313
2314 lzma_ret r = lzma_code(&this->lzma, action);
2315
2316 /* bytes were emitted? */
2317 if ((n = sizeof(buf) - this->lzma.avail_out) != 0) {
2318 this->chain->Write(buf, n);
2319 }
2320 if (r == LZMA_STREAM_END) break;
2321 if (r != LZMA_OK) SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, "liblzma returned error code");
2322 } while (this->lzma.avail_in || !this->lzma.avail_out);
2323 }
2324
2325 /* virtual */ void Write(byte *buf, size_t size)
2326 {
2327 this->WriteLoop(buf, size, LZMA_RUN);
2328 }
2329
2330 /* virtual */ void Finish()
2331 {
2332 this->WriteLoop(NULL, 0, LZMA_FINISH);
2333 this->chain->Finish();
2334 }
2335 };
2336
2337 #endif /* WITH_LZMA */
2338
2339 /*******************************************
2340 ************* END OF CODE *****************
2341 *******************************************/
2342
2344 struct SaveLoadFormat {
2345 const char *name;
2346 uint32 tag;
2347
2348 LoadFilter *(*init_load)(LoadFilter *chain);
2349 SaveFilter *(*init_write)(SaveFilter *chain, byte compression);
2350
2351 byte min_compression;
2352 byte default_compression;
2353 byte max_compression;
2354 };
2355
2357 static const SaveLoadFormat _saveload_formats[] = {
2358 #if defined(WITH_LZO)
2359 /* Roughly 75% larger than zlib level 6 at only ~7% of the CPU usage. */
2360 {"lzo", TO_BE32X('OTTD'), CreateLoadFilter<LZOLoadFilter>, CreateSaveFilter<LZOSaveFilter>, 0, 0, 0},
2361 #else
2362 {"lzo", TO_BE32X('OTTD'), NULL, NULL, 0, 0, 0},
2363 #endif
2364 /* Roughly 5 times larger at only 1% of the CPU usage over zlib level 6. */
2365 {"none", TO_BE32X('OTTN'), CreateLoadFilter<NoCompLoadFilter>, CreateSaveFilter<NoCompSaveFilter>, 0, 0, 0},
2366 #if defined(WITH_ZLIB)
2367 /* After level 6 the speed reduction is significant (1.5x to 2.5x slower per level), but the reduction in filesize is
2368 * fairly insignificant (~1% for each step). Lower levels become ~5-10% bigger by each level than level 6 while level
2369 * 1 is "only" 3 times as fast. Level 0 results in uncompressed savegames at about 8 times the cost of "none". */
2370 {"zlib", TO_BE32X('OTTZ'), CreateLoadFilter<ZlibLoadFilter>, CreateSaveFilter<ZlibSaveFilter>, 0, 6, 9},
2371 #else
2372 {"zlib", TO_BE32X('OTTZ'), NULL, NULL, 0, 0, 0},
2373 #endif
2374 #if defined(WITH_LZMA)
2375 /* Level 2 compression is speed wise as fast as zlib level 6 compression (old default), but results in ~10% smaller saves.
2376 * Higher compression levels are possible, and might improve savegame size by up to 25%, but are also up to 10 times slower.
2377 * The next significant reduction in file size is at level 4, but that is already 4 times slower. Level 3 is primarily 50%
2378 * slower while not improving the filesize, while level 0 and 1 are faster, but don't reduce savegame size much.
2379 * It's OTTX and not e.g. OTTL because liblzma is part of xz-utils and .tar.xz is preferred over .tar.lzma. */
2380 {"lzma", TO_BE32X('OTTX'), CreateLoadFilter<LZMALoadFilter>, CreateSaveFilter<LZMASaveFilter>, 0, 2, 9},
2381 #else
2382 {"lzma", TO_BE32X('OTTX'), NULL, NULL, 0, 0, 0},
2383 #endif
2384 };
2385
2393 static const SaveLoadFormat *GetSavegameFormat(char *s, byte *compression_level)
2394 {
2395 const SaveLoadFormat *def = lastof(_saveload_formats);
2396
2397 /* find default savegame format, the highest one with which files can be written */
2398 while (!def->init_write) def--;
2399
2400 if (!StrEmpty(s)) {
2401 /* Get the ":..." of the compression level out of the way */
2402 char *complevel = strrchr(s, ':');
2403 if (complevel != NULL) *complevel = '\0';
2404
2405 for (const SaveLoadFormat *slf = &_saveload_formats[0]; slf != endof(_saveload_formats); slf++) {
2406 if (slf->init_write != NULL && strcmp(s, slf->name) == 0) {
2407 *compression_level = slf->default_compression;
2408 if (complevel != NULL) {
2409 /* There is a compression level in the string.
2410 * First restore the : we removed to do proper name matching,
2411 * then move the the begin of the actual version. */
2412 *complevel = ':';
2413 complevel++;
2414
2415 /* Get the version and determine whether all went fine. */
2416 char *end;
2417 long level = strtol(complevel, &end, 10);
2418 if (end == complevel || level != Clamp(level, slf->min_compression, slf->max_compression)) {
2419 SetDParamStr(0, complevel);
2420 ShowErrorMessage(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_SAVEGAME_COMPRESSION_LEVEL, WL_CRITICAL);
2421 } else {
2422 *compression_level = level;
2423 }
2424 }
2425 return slf;
2426 }
2427 }
2428
2429 SetDParamStr(0, s);
2430 SetDParamStr(1, def->name);
2431 ShowErrorMessage(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_SAVEGAME_COMPRESSION_ALGORITHM, WL_CRITICAL);
2432
2433 /* Restore the string by adding the : back */
2434 if (complevel != NULL) *complevel = ':';
2435 }
2436 *compression_level = def->default_compression;
2437 return def;
2438 }
2439
2440 /* actual loader/saver function */
2441 void InitializeGame(uint size_x, uint size_y, bool reset_date, bool reset_settings);
2442 extern bool AfterLoadGame();
2443 extern bool LoadOldSaveGame(const char *file);
2444
2448 static inline void ClearSaveLoadState()
2449 {
2450 delete _sl.dumper;
2451 _sl.dumper = NULL;
2452
2453 delete _sl.sf;
2454 _sl.sf = NULL;
2455
2456 delete _sl.reader;
2457 _sl.reader = NULL;
2458
2459 delete _sl.lf;
2460 _sl.lf = NULL;
2461 }
2462
2468 static void SaveFileStart()
2469 {
2470 _sl.ff_state = _fast_forward;
2471 _fast_forward = 0;
2472 SetMouseCursorBusy(true);
2473
2474 InvalidateWindowData(WC_STATUS_BAR, 0, SBI_SAVELOAD_START);
2475 _sl.saveinprogress = true;
2476 }
2477
2479 static void SaveFileDone()
2480 {
2481 if (_game_mode != GM_MENU) _fast_forward = _sl.ff_state;
2482 SetMouseCursorBusy(false);
2483
2484 InvalidateWindowData(WC_STATUS_BAR, 0, SBI_SAVELOAD_FINISH);
2485 _sl.saveinprogress = false;
2486 }
2487
2489 void SetSaveLoadError(StringID str)
2490 {
2491 _sl.error_str = str;
2492 }
2493
2495 const char *GetSaveLoadErrorString()
2496 {
2497 SetDParam(0, _sl.error_str);
2498 SetDParamStr(1, _sl.extra_msg);
2499
2500 static char err_str[512];
2501 GetString(err_str, _sl.action == SLA_SAVE ? STR_ERROR_GAME_SAVE_FAILED : STR_ERROR_GAME_LOAD_FAILED, lastof(err_str));
2502 return err_str;
2503 }
2504
2506 static void SaveFileError()
2507 {
2508 SetDParamStr(0, GetSaveLoadErrorString());
2509 ShowErrorMessage(STR_JUST_RAW_STRING, INVALID_STRING_ID, WL_ERROR);
2510 SaveFileDone();
2511 }
2512
2517 static SaveOrLoadResult SaveFileToDisk(bool threaded)
2518 {
2519 try {
2520 byte compression;
2521 const SaveLoadFormat *fmt = GetSavegameFormat(_savegame_format, &compression);
2522
2523 /* We have written our stuff to memory, now write it to file! */
2524 uint32 hdr[2] = { fmt->tag, TO_BE32(SAVEGAME_VERSION << 16) };
2525 _sl.sf->Write((byte*)hdr, sizeof(hdr));
2526
2527 _sl.sf = fmt->init_write(_sl.sf, compression);
2528 _sl.dumper->Flush(_sl.sf);
2529
2530 ClearSaveLoadState();
2531
2532 if (threaded) SetAsyncSaveFinish(SaveFileDone);
2533
2534 return SL_OK;
2535 } catch (...) {
2536 ClearSaveLoadState();
2537
2538 AsyncSaveFinishProc asfp = SaveFileDone;
2539
2540 /* We don't want to shout when saving is just
2541 * cancelled due to a client disconnecting. */
2542 if (_sl.error_str != STR_NETWORK_ERROR_LOSTCONNECTION) {
2543 /* Skip the "colour" character */
2544 DEBUG(sl, 0, "%s", GetSaveLoadErrorString() + 3);
2545 asfp = SaveFileError;
2546 }
2547
2548 if (threaded) {
2549 SetAsyncSaveFinish(asfp);
2550 } else {
2551 asfp();
2552 }
2553 return SL_ERROR;
2554 }
2555 }
2556
2558 static void SaveFileToDiskThread(void *arg)
2559 {
2560 SaveFileToDisk(true);
2561 }
2562
2563 void WaitTillSaved()
2564 {
2565 if (_save_thread == NULL) return;
2566
2567 _save_thread->Join();
2568 delete _save_thread;
2569 _save_thread = NULL;
2570
2571 /* Make sure every other state is handled properly as well. */
2572 ProcessAsyncSaveFinish();
2573 }
2574
2583 static SaveOrLoadResult DoSave(SaveFilter *writer, bool threaded)
2584 {
2585 assert(!_sl.saveinprogress);
2586
2587 _sl.dumper = new MemoryDumper();
2588 _sl.sf = writer;
2589
2590 _sl_version = SAVEGAME_VERSION;
2591
2592 SaveViewportBeforeSaveGame();
2593 SlSaveChunks();
2594
2595 SaveFileStart();
2596 if (!threaded || !ThreadObject::New(&SaveFileToDiskThread, NULL, &_save_thread, "ottd:savegame")) {
2597 if (threaded) DEBUG(sl, 1, "Cannot create savegame thread, reverting to single-threaded mode...");
2598
2599 SaveOrLoadResult result = SaveFileToDisk(false);
2600 SaveFileDone();
2601
2602 return result;
2603 }
2604
2605 return SL_OK;
2606 }
2607
2614 SaveOrLoadResult SaveWithFilter(SaveFilter *writer, bool threaded)
2615 {
2616 try {
2617 _sl.action = SLA_SAVE;
2618 return DoSave(writer, threaded);
2619 } catch (...) {
2620 ClearSaveLoadState();
2621 return SL_ERROR;
2622 }
2623 }
2624
2631 static SaveOrLoadResult DoLoad(LoadFilter *reader, bool load_check)
2632 {
2633 _sl.lf = reader;
2634
2635 if (load_check) {
2636 /* Clear previous check data */
2637 _load_check_data.Clear();
2638 /* Mark SL_LOAD_CHECK as supported for this savegame. */
2639 _load_check_data.checkable = true;
2640 }
2641
2642 uint32 hdr[2];
2643 if (_sl.lf->Read((byte*)hdr, sizeof(hdr)) != sizeof(hdr)) SlError(STR_GAME_SAVELOAD_ERROR_FILE_NOT_READABLE);
2644
2645 /* see if we have any loader for this type. */
2646 const SaveLoadFormat *fmt = _saveload_formats;
2647 for (;;) {
2648 /* No loader found, treat as version 0 and use LZO format */
2649 if (fmt == endof(_saveload_formats)) {
2650 DEBUG(sl, 0, "Unknown savegame type, trying to load it as the buggy format");
2651 _sl.lf->Reset();
2652 _sl_version = 0;
2653 _sl_minor_version = 0;
2654
2655 /* Try to find the LZO savegame format; it uses 'OTTD' as tag. */
2656 fmt = _saveload_formats;
2657 for (;;) {
2658 if (fmt == endof(_saveload_formats)) {
2659 /* Who removed LZO support? Bad bad boy! */
2660 NOT_REACHED();
2661 }
2662 if (fmt->tag == TO_BE32X('OTTD')) break;
2663 fmt++;
2664 }
2665 break;
2666 }
2667
2668 if (fmt->tag == hdr[0]) {
2669 /* check version number */
2670 _sl_version = TO_BE32(hdr[1]) >> 16;
2671 /* Minor is not used anymore from version 18.0, but it is still needed
2672 * in versions before that (4 cases) which can't be removed easy.
2673 * Therefore it is loaded, but never saved (or, it saves a 0 in any scenario). */
2674 _sl_minor_version = (TO_BE32(hdr[1]) >> 8) & 0xFF;
2675
2676 DEBUG(sl, 1, "Loading savegame version %d", _sl_version);
2677
2678 /* Is the version higher than the current? */
2679 if (_sl_version > SAVEGAME_VERSION) SlError(STR_GAME_SAVELOAD_ERROR_TOO_NEW_SAVEGAME);
2680 break;
2681 }
2682
2683 fmt++;
2684 }
2685
2686 /* loader for this savegame type is not implemented? */
2687 if (fmt->init_load == NULL) {
2688 char err_str[64];
2689 seprintf(err_str, lastof(err_str), "Loader for '%s' is not available.", fmt->name);
2690 SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, err_str);
2691 }
2692
2693 _sl.lf = fmt->init_load(_sl.lf);
2694 _sl.reader = new ReadBuffer(_sl.lf);
2695 _next_offs = 0;
2696
2697 if (!load_check) {
2698 /* Old maps were hardcoded to 256x256 and thus did not contain
2699 * any mapsize information. Pre-initialize to 256x256 to not to
2700 * confuse old games */
2701 InitializeGame(256, 256, true, true);
2702
2703 GamelogReset();
2704
2705 if (IsSavegameVersionBefore(4)) {
2706 /*
2707 * NewGRFs were introduced between 0.3,4 and 0.3.5, which both
2708 * shared savegame version 4. Anything before that 'obviously'
2709 * does not have any NewGRFs. Between the introduction and
2710 * savegame version 41 (just before 0.5) the NewGRF settings
2711 * were not stored in the savegame and they were loaded by
2712 * using the settings from the main menu.
2713 * So, to recap:
2714 * - savegame version < 4: do not load any NewGRFs.
2715 * - savegame version >= 41: load NewGRFs from savegame, which is
2716 * already done at this stage by
2717 * overwriting the main menu settings.
2718 * - other savegame versions: use main menu settings.
2719 *
2720 * This means that users *can* crash savegame version 4..40
2721 * savegames if they set incompatible NewGRFs in the main menu,
2722 * but can't crash anymore for savegame version < 4 savegames.
2723 *
2724 * Note: this is done here because AfterLoadGame is also called
2725 * for TTO/TTD/TTDP savegames which have their own NewGRF logic.
2726 */
2727 ClearGRFConfigList(&_grfconfig);
2728 }
2729 }
2730
2731 if (load_check) {
2732 /* Load chunks into _load_check_data.
2733 * No pools are loaded. References are not possible, and thus do not need resolving. */
2734 SlLoadCheckChunks();
2735 } else {
2736 /* Load chunks and resolve references */
2737 SlLoadChunks();
2738 SlFixPointers();
2739 }
2740
2741 ClearSaveLoadState();
2742
2743 _savegame_type = SGT_OTTD;
2744
2745 if (load_check) {
2746 /* The only part from AfterLoadGame() we need */
2747 _load_check_data.grf_compatibility = IsGoodGRFConfigList(_load_check_data.grfconfig);
2748 } else {
2749 GamelogStartAction(GLAT_LOAD);
2750
2751 /* After loading fix up savegame for any internal changes that
2752 * might have occurred since then. If it fails, load back the old game. */
2753 if (!AfterLoadGame()) {
2754 GamelogStopAction();
2755 return SL_REINIT;
2756 }
2757
2758 GamelogStopAction();
2759 }
2760
2761 return SL_OK;
2762 }
2763
2769 SaveOrLoadResult LoadWithFilter(LoadFilter *reader)
2770 {
2771 try {
2772 _sl.action = SLA_LOAD;
2773 return DoLoad(reader, false);
2774 } catch (...) {
2775 ClearSaveLoadState();
2776 return SL_REINIT;
2777 }
2778 }
2779
2789 SaveOrLoadResult SaveOrLoad(const char *filename, SaveLoadOperation fop, DetailedFileType dft, Subdirectory sb, bool threaded)
2790 {
2791 /* An instance of saving is already active, so don't go saving again */
2792 if (_sl.saveinprogress && fop == SLO_SAVE && dft == DFT_GAME_FILE && threaded) {
2793 /* if not an autosave, but a user action, show error message */
2794 if (!_do_autosave) ShowErrorMessage(STR_ERROR_SAVE_STILL_IN_PROGRESS, INVALID_STRING_ID, WL_ERROR);
2795 return SL_OK;
2796 }
2797 WaitTillSaved();
2798
2799 try {
2800 /* Load a TTDLX or TTDPatch game */
2801 if (fop == SLO_LOAD && dft == DFT_OLD_GAME_FILE) {
2802 InitializeGame(256, 256, true, true); // set a mapsize of 256x256 for TTDPatch games or it might get confused
2803
2804 /* TTD/TTO savegames have no NewGRFs, TTDP savegame have them
2805 * and if so a new NewGRF list will be made in LoadOldSaveGame.
2806 * Note: this is done here because AfterLoadGame is also called
2807 * for OTTD savegames which have their own NewGRF logic. */
2808 ClearGRFConfigList(&_grfconfig);
2809 GamelogReset();
2810 if (!LoadOldSaveGame(filename)) return SL_REINIT;
2811 _sl_version = 0;
2812 _sl_minor_version = 0;
2813 GamelogStartAction(GLAT_LOAD);
2814 if (!AfterLoadGame()) {
2815 GamelogStopAction();
2816 return SL_REINIT;
2817 }
2818 GamelogStopAction();
2819 return SL_OK;
2820 }
2821
2822 assert(dft == DFT_GAME_FILE);
2823 switch (fop) {
2824 case SLO_CHECK:
2825 _sl.action = SLA_LOAD_CHECK;
2826 break;
2827
2828 case SLO_LOAD:
2829 _sl.action = SLA_LOAD;
2830 break;
2831
2832 case SLO_SAVE:
2833 _sl.action = SLA_SAVE;
2834 break;
2835
2836 default: NOT_REACHED();
2837 }
2838
2839 FILE *fh = (fop == SLO_SAVE) ? FioFOpenFile(filename, "wb", sb) : FioFOpenFile(filename, "rb", sb);
2840
2841 /* Make it a little easier to load savegames from the console */
2842 if (fh == NULL && fop != SLO_SAVE) fh = FioFOpenFile(filename, "rb", SAVE_DIR);
2843 if (fh == NULL && fop != SLO_SAVE) fh = FioFOpenFile(filename, "rb", BASE_DIR);
2844 if (fh == NULL && fop != SLO_SAVE) fh = FioFOpenFile(filename, "rb", SCENARIO_DIR);
2845
2846 if (fh == NULL) {
2847 SlError(fop == SLO_SAVE ? STR_GAME_SAVELOAD_ERROR_FILE_NOT_WRITEABLE : STR_GAME_SAVELOAD_ERROR_FILE_NOT_READABLE);
2848 }
2849
2850 if (fop == SLO_SAVE) { // SAVE game
2851 DEBUG(desync, 1, "save: %08x; %02x; %s", _date, _date_fract, filename);
2852 if (_network_server || !_settings_client.gui.threaded_saves) threaded = false;
2853
2854 return DoSave(new FileWriter(fh), threaded);
2855 }
2856
2857 /* LOAD game */
2858 assert(fop == SLO_LOAD || fop == SLO_CHECK);
2859 DEBUG(desync, 1, "load: %s", filename);
2860 return DoLoad(new FileReader(fh), fop == SLO_CHECK);
2861 } catch (...) {
2862 /* This code may be executed both for old and new save games. */
2863 ClearSaveLoadState();
2864
2865 /* Skip the "colour" character */
2866 if (fop != SLO_CHECK) DEBUG(sl, 0, "%s", GetSaveLoadErrorString() + 3);
2867
2868 /* A saver/loader exception!! reinitialize all variables to prevent crash! */
2869 return (fop == SLO_LOAD) ? SL_REINIT : SL_ERROR;
2870 }
2871 }
2872
2874 void DoExitSave()
2875 {
2876 SaveOrLoad("exit.sav", SLO_SAVE, DFT_GAME_FILE, AUTOSAVE_DIR);
2877 }
2878
2884 void GenerateDefaultSaveName(char *buf, const char *last)
2885 {
2886 /* Check if we have a name for this map, which is the name of the first
2887 * available company. When there's no company available we'll use
2888 * 'Spectator' as "company" name. */
2889 CompanyID cid = _local_company;
2890 if (!Company::IsValidID(cid)) {
2891 const Company *c;
2892 FOR_ALL_COMPANIES(c) {
2893 cid = c->index;
2894 break;
2895 }
2896 }
2897
2898 SetDParam(0, cid);
2899
2900 /* Insert current date */
2901 switch (_settings_client.gui.date_format_in_default_names) {
2902 case 0: SetDParam(1, STR_JUST_DATE_LONG); break;
2903 case 1: SetDParam(1, STR_JUST_DATE_TINY); break;
2904 case 2: SetDParam(1, STR_JUST_DATE_ISO); break;
2905 default: NOT_REACHED();
2906 }
2907 SetDParam(2, _date);
2908
2909 /* Get the correct string (special string for when there's not company) */
2910 GetString(buf, !Company::IsValidID(cid) ? STR_SAVEGAME_NAME_SPECTATOR : STR_SAVEGAME_NAME_DEFAULT, last);
2911 SanitizeFilename(buf);
2912 }
2913
2918 void FileToSaveLoad::SetMode(FiosType ft)
2919 {
2920 this->SetMode(SLO_LOAD, GetAbstractFileType(ft), GetDetailedFileType(ft));
2921 }
2922
2929 void FileToSaveLoad::SetMode(SaveLoadOperation fop, AbstractFileType aft, DetailedFileType dft)
2930 {
2931 if (aft == FT_INVALID || aft == FT_NONE) {
2932 this->file_op = SLO_INVALID;
2933 this->detail_ftype = DFT_INVALID;
2934 this->abstract_ftype = FT_INVALID;
2935 return;
2936 }
2937
2938 this->file_op = fop;
2939 this->detail_ftype = dft;
2940 this->abstract_ftype = aft;
2941 }
2942
2947 void FileToSaveLoad::SetName(const char *name)
2948 {
2949 strecpy(this->name, name, lastof(this->name));
2950 }
2951
2956 void FileToSaveLoad::SetTitle(const char *title)
2957 {
2958 strecpy(this->title, title, lastof(this->title));
2959 }
2960
2961 #if 0
2962
2968 int GetSavegameType(char *file)
2969 {
2970 const SaveLoadFormat *fmt;
2971 uint32 hdr;
2972 FILE *f;
2973 int mode = SL_OLD_LOAD;
2974
2975 f = fopen(file, "rb");
2976 if (fread(&hdr, sizeof(hdr), 1, f) != 1) {
2977 DEBUG(sl, 0, "Savegame is obsolete or invalid format");
2978 mode = SL_LOAD; // don't try to get filename, just show name as it is written
2979 } else {
2980 /* see if we have any loader for this type. */
2981 for (fmt = _saveload_formats; fmt != endof(_saveload_formats); fmt++) {
2982 if (fmt->tag == hdr) {
2983 mode = SL_LOAD; // new type of savegame
2984 break;
2985 }
2986 }
2987 }
2988
2989 fclose(f);
2990 return mode;
2991 }
2992 #endif