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
|
/* $Id$ */
/** @file newgrf_config.cpp */
#include "stdafx.h"
#include "openttd.h"
#include "functions.h"
#include "macros.h"
#include "debug.h"
#include "variables.h"
#include "string.h"
#include "saveload.h"
#include "md5.h"
#include "network/network_data.h"
#include "newgrf.h"
#include "newgrf_config.h"
#include "helpers.hpp"
#include "fileio.h"
#include "fios.h"
#include <sys/stat.h>
#ifdef WIN32
# include <io.h>
#endif /* WIN32 */
GRFConfig *_all_grfs;
GRFConfig *_grfconfig;
GRFConfig *_grfconfig_newgame;
GRFConfig *_grfconfig_static;
/* Calculate the MD5 Sum for a GRF */
static bool CalcGRFMD5Sum(GRFConfig *config)
{
FILE *f;
md5_state_t md5state;
md5_byte_t buffer[1024];
size_t len, size;
/* open the file */
f = FioFOpenFile(config->filename, "rb", DATA_DIR, &size);
if (f == NULL) return false;
/* calculate md5sum */
md5_init(&md5state);
while ((len = fread(buffer, 1, (size > sizeof(buffer)) ? sizeof(buffer) : size, f)) != 0 && size != 0) {
size -= len;
md5_append(&md5state, buffer, len);
}
md5_finish(&md5state, config->md5sum);
FioFCloseFile(f);
return true;
}
/* Find the GRFID and calculate the md5sum */
bool FillGRFDetails(GRFConfig *config, bool is_static)
{
if (!FioCheckFileExists(config->filename)) {
config->status = GCS_NOT_FOUND;
return false;
}
/* Find and load the Action 8 information */
/* 62 is the last file slot before sample.cat.
* Should perhaps be some "don't care" value */
LoadNewGRFFile(config, 62, GLS_FILESCAN);
/* Skip if the grfid is 0 (not read) or 0xFFFFFFFF (ttdp system grf) */
if (config->grfid == 0 || config->grfid == 0xFFFFFFFF) return false;
if (is_static) {
/* Perform a 'safety scan' for static GRFs */
LoadNewGRFFile(config, 62, GLS_SAFETYSCAN);
/* GCF_UNSAFE is set if GLS_SAFETYSCAN finds unsafe actions */
if (HASBIT(config->flags, GCF_UNSAFE)) return false;
}
return CalcGRFMD5Sum(config);
}
void ClearGRFConfig(GRFConfig **config)
{
/* GCF_COPY as in NOT strdupped/alloced the filename, name and info */
if (!HASBIT((*config)->flags, GCF_COPY)) {
free((*config)->filename);
free((*config)->name);
free((*config)->info);
if ((*config)->error != NULL) {
free((*config)->error->custom_message);
free((*config)->error->data);
free((*config)->error);
}
}
free(*config);
*config = NULL;
}
/* Clear a GRF Config list */
void ClearGRFConfigList(GRFConfig **config)
{
GRFConfig *c, *next;
for (c = *config; c != NULL; c = next) {
next = c->next;
ClearGRFConfig(&c);
}
*config = NULL;
}
/** Copy a GRF Config list
* @param dst pointer to destination list
* @param src pointer to source list values
* @param init_only the copied GRF will be processed up to GLS_INIT
* @return pointer to the last value added to the destination list */
GRFConfig **CopyGRFConfigList(GRFConfig **dst, const GRFConfig *src, bool init_only)
{
/* Clear destination as it will be overwritten */
ClearGRFConfigList(dst);
for (; src != NULL; src = src->next) {
GRFConfig *c = CallocT<GRFConfig>(1);
*c = *src;
if (src->filename != NULL) c->filename = strdup(src->filename);
if (src->name != NULL) c->name = strdup(src->name);
if (src->info != NULL) c->info = strdup(src->info);
if (src->error != NULL) {
c->error = CallocT<GRFError>(1);
memcpy(c->error, src->error, sizeof(GRFError));
if (src->error->data != NULL) c->error->data = strdup(src->error->data);
if (src->error->custom_message != NULL) c->error->custom_message = strdup(src->error->custom_message);
}
CLRBIT(c->flags, GCF_INIT_ONLY);
if (init_only) SETBIT(c->flags, GCF_INIT_ONLY);
*dst = c;
dst = &c->next;
}
return dst;
}
/**
* Removes duplicates from lists of GRFConfigs. These duplicates
* are introduced when the _grfconfig_static GRFs are appended
* to the _grfconfig on a newgame or savegame. As the parameters
* of the static GRFs could be different that the parameters of
* the ones used non-statically. This can result in desyncs in
* multiplayers, so the duplicate static GRFs have to be removed.
*
* This function _assumes_ that all static GRFs are placed after
* the non-static GRFs.
*
* @param list the list to remove the duplicates from
*/
static void RemoveDuplicatesFromGRFConfigList(GRFConfig *list)
{
GRFConfig *prev;
GRFConfig *cur;
if (list == NULL) return;
for (prev = list, cur = list->next; cur != NULL; prev = cur, cur = cur->next) {
if (cur->grfid != list->grfid) continue;
prev->next = cur->next;
ClearGRFConfig(&cur);
cur = prev; // Just go back one so it continues as normal later on
}
RemoveDuplicatesFromGRFConfigList(list->next);
}
/**
* Appends the static GRFs to a list of GRFs
* @param dst the head of the list to add to
*/
void AppendStaticGRFConfigs(GRFConfig **dst)
{
GRFConfig **tail = dst;
while (*tail != NULL) tail = &(*tail)->next;
CopyGRFConfigList(tail, _grfconfig_static, false);
RemoveDuplicatesFromGRFConfigList(*dst);
}
/** Appends an element to a list of GRFs
* @param dst the head of the list to add to
* @param el the new tail to be */
void AppendToGRFConfigList(GRFConfig **dst, GRFConfig *el)
{
GRFConfig **tail = dst;
while (*tail != NULL) tail = &(*tail)->next;
*tail = el;
RemoveDuplicatesFromGRFConfigList(*dst);
}
/* Reset the current GRF Config to either blank or newgame settings */
void ResetGRFConfig(bool defaults)
{
CopyGRFConfigList(&_grfconfig, _grfconfig_newgame, !defaults);
AppendStaticGRFConfigs(&_grfconfig);
}
/** Check if all GRFs in the GRF config from a savegame can be loaded.
* @return will return any of the following 3 values:<br>
* <ul>
* <li> GLC_ALL_GOOD: No problems occured, all GRF files were found and loaded
* <li> GLC_COMPATIBLE: For one or more GRF's no exact match was found, but a
* compatible GRF with the same grfid was found and used instead
* <li> GLC_NOT_FOUND: For one or more GRF's no match was found at all
* </ul> */
GRFListCompatibility IsGoodGRFConfigList()
{
GRFListCompatibility res = GLC_ALL_GOOD;
for (GRFConfig *c = _grfconfig; c != NULL; c = c->next) {
const GRFConfig *f = FindGRFConfig(c->grfid, c->md5sum);
if (f == NULL) {
char buf[256];
/* If we have not found the exactly matching GRF try to find one with the
* same grfid, as it most likely is compatible */
f = FindGRFConfig(c->grfid);
if (f != NULL) {
md5sumToString(buf, lastof(buf), c->md5sum);
DEBUG(grf, 1, "NewGRF %08X (%s) not found; checksum %s. Compatibility mode on", BSWAP32(c->grfid), c->filename, buf);
SETBIT(c->flags, GCF_COMPATIBLE);
/* Non-found has precedence over compatibility load */
if (res != GLC_NOT_FOUND) res = GLC_COMPATIBLE;
goto compatible_grf;
}
/* No compatible grf was found, mark it as disabled */
md5sumToString(buf, lastof(buf), c->md5sum);
DEBUG(grf, 0, "NewGRF %08X (%s) not found; checksum %s", BSWAP32(c->grfid), c->filename, buf);
c->status = GCS_NOT_FOUND;
res = GLC_NOT_FOUND;
} else {
compatible_grf:
DEBUG(grf, 1, "Loading GRF %08X from %s", BSWAP32(f->grfid), f->filename);
/* The filename could be the filename as in the savegame. As we need
* to load the GRF here, we need the correct filename, so overwrite that
* in any case and set the name and info when it is not set already.
* When the GCF_COPY flag is set, it is certain that the filename is
* already a local one, so there is no need to replace it. */
if (!HASBIT(c->flags, GCF_COPY)) {
free(c->filename);
c->filename = strdup(f->filename);
memcpy(c->md5sum, f->md5sum, sizeof(c->md5sum));
if (c->name == NULL && f->name != NULL) c->name = strdup(f->name);
if (c->info == NULL && f->info != NULL) c->info = strdup(f->info);
c->error = NULL;
}
}
}
return res;
}
static bool ScanPathAddGrf(const char *filename)
{
GRFConfig *c = CallocT<GRFConfig>(1);
c->filename = strdup(filename);
bool added = true;
if (FillGRFDetails(c, false)) {
if (_all_grfs == NULL) {
_all_grfs = c;
} else {
/* Insert file into list at a position determined by its
* name, so the list is sorted as we go along */
GRFConfig **pd, *d;
bool stop = false;
for (pd = &_all_grfs; (d = *pd) != NULL; pd = &d->next) {
if (c->grfid == d->grfid && memcmp(c->md5sum, d->md5sum, sizeof(c->md5sum)) == 0) added = false;
/* Because there can be multiple grfs with the same name, make sure we checked all grfs with the same name,
* before inserting the entry. So insert a new grf at the end of all grfs with the same name, instead of
* just after the first with the same name. Avoids doubles in the list. */
if (strcasecmp(c->name, d->name) <= 0) stop = true;
else if (stop) break;
}
if (added) {
c->next = d;
*pd = c;
}
}
} else {
added = false;
}
if (!added) {
/* File couldn't be opened, or is either not a NewGRF or is a
* 'system' NewGRF or it's already known, so forget about it. */
free(c->filename);
free(c->name);
free(c->info);
free(c);
}
return added;
}
/* Scan a path for NewGRFs */
static uint ScanPath(const char *path, int basepath_length)
{
extern bool FiosIsValidFile(const char *path, const struct dirent *ent, struct stat *sb);
uint num = 0;
struct stat sb;
struct dirent *dirent;
DIR *dir;
if (path == NULL || (dir = ttd_opendir(path)) == NULL) return 0;
while ((dirent = readdir(dir)) != NULL) {
const char *d_name = FS2OTTD(dirent->d_name);
char filename[MAX_PATH];
if (!FiosIsValidFile(path, dirent, &sb)) continue;
snprintf(filename, lengthof(filename), "%s%s", path, d_name);
if (sb.st_mode & S_IFDIR) {
/* Directory */
if (strcmp(d_name, ".") == 0 || strcmp(d_name, "..") == 0) continue;
AppendPathSeparator(filename, lengthof(filename));
num += ScanPath(filename, basepath_length);
} else if (sb.st_mode & S_IFREG) {
/* File */
char *ext = strrchr(filename, '.');
/* If no extension or extension isn't .grf, skip the file */
if (ext == NULL) continue;
if (strcasecmp(ext, ".grf") != 0) continue;
if (ScanPathAddGrf(filename + basepath_length)) num++;
}
}
closedir(dir);
return num;
}
static uint ScanTar(TarFileList::iterator tar)
{
uint num = 0;
const char *filename = (*tar).first.c_str();
const char *ext = strrchr(filename, '.');
/* If no extension or extension isn't .grf, skip the file */
if (ext == NULL) return false;
if (strcasecmp(ext, ".grf") != 0) return false;
if (ScanPathAddGrf(filename)) num++;
return num;
}
/**
* Simple sorter for GRFS
* @param p1 the first GRFConfig *
* @param p2 the second GRFConfig *
* @return the same strcmp would return for the name of the NewGRF.
*/
static int GRFSorter(const void *p1, const void *p2)
{
const GRFConfig *c1 = *(const GRFConfig **)p1;
const GRFConfig *c2 = *(const GRFConfig **)p2;
return strcmp(c1->name != NULL ? c1->name : c1->filename,
c2->name != NULL ? c2->name : c2->filename);
}
/* Scan for all NewGRFs */
void ScanNewGRFFiles()
{
Searchpath sp;
char path[MAX_PATH];
TarFileList::iterator tar;
uint num = 0;
ClearGRFConfigList(&_all_grfs);
DEBUG(grf, 1, "Scanning for NewGRFs");
FOR_ALL_SEARCHPATHS(sp) {
FioAppendDirectory(path, MAX_PATH, sp, DATA_DIR);
num += ScanPath(path, strlen(path));
}
FOR_ALL_TARS(tar) {
num += ScanTar(tar);
}
DEBUG(grf, 1, "Scan complete, found %d files", num);
/* Sort the linked list using quicksort.
* For that we first have to make an array, the qsort and
* then remake the linked list. */
GRFConfig **to_sort = MallocT<GRFConfig*>(num);
if (to_sort == NULL) return; // No memory, then don't sort
uint i = 0;
for (GRFConfig *p = _all_grfs; p != NULL; p = p->next, i++) {
to_sort[i] = p;
}
/* Number of files is not necessarily right */
num = i;
qsort(to_sort, num, sizeof(GRFConfig*), GRFSorter);
for (i = 1; i < num; i++) {
to_sort[i - 1]->next = to_sort[i];
}
to_sort[num - 1]->next = NULL;
_all_grfs = to_sort[0];
}
/* Find a NewGRF in the scanned list, if md5sum is NULL, we don't care about it*/
const GRFConfig *FindGRFConfig(uint32 grfid, const uint8 *md5sum)
{
for (const GRFConfig *c = _all_grfs; c != NULL; c = c->next) {
if (c->grfid == grfid) {
if (md5sum == NULL) return c;
if (memcmp(md5sum, c->md5sum, sizeof(c->md5sum)) == 0) return c;
}
}
return NULL;
}
#ifdef ENABLE_NETWORK
/** Structure for UnknownGRFs; this is a lightweight variant of GRFConfig */
struct UnknownGRF : public GRFIdentifier {
UnknownGRF *next;
char name[NETWORK_GRF_NAME_LENGTH];
};
/**
* Finds the name of a NewGRF in the list of names for unknown GRFs. An
* unknown GRF is a GRF where the .grf is not found during scanning.
*
* The names are resolved via UDP calls to servers that should know the name,
* though the replies may not come. This leaves "<Unknown>" as name, though
* that shouldn't matter _very_ much as they need GRF crawler or so to look
* up the GRF anyway and that works better with the GRF ID.
*
* @param grfid the GRF ID part of the 'unique' GRF identifier
* @param md5sum the MD5 checksum part of the 'unique' GRF identifier
* @param create whether to create a new GRFConfig if the GRFConfig did not
* exist in the fake list of GRFConfigs.
* @return the GRFConfig with the given GRF ID and MD5 checksum or NULL when
* it does not exist and create is false. This value must NEVER be
* freed by the caller.
*/
char *FindUnknownGRFName(uint32 grfid, uint8 *md5sum, bool create)
{
UnknownGRF *grf;
static UnknownGRF *unknown_grfs = NULL;
for (grf = unknown_grfs; grf != NULL; grf = grf->next) {
if (grf->grfid == grfid) {
if (memcmp(md5sum, grf->md5sum, sizeof(grf->md5sum)) == 0) return grf->name;
}
}
if (!create) return NULL;
grf = CallocT<UnknownGRF>(1);
grf->grfid = grfid;
grf->next = unknown_grfs;
ttd_strlcpy(grf->name, UNKNOWN_GRF_NAME_PLACEHOLDER, sizeof(grf->name));
memcpy(grf->md5sum, md5sum, sizeof(grf->md5sum));
unknown_grfs = grf;
return grf->name;
}
#endif /* ENABLE_NETWORK */
/* Retrieve a NewGRF from the current config by its grfid */
GRFConfig *GetGRFConfig(uint32 grfid)
{
GRFConfig *c;
for (c = _grfconfig; c != NULL; c = c->next) {
if (c->grfid == grfid) return c;
}
return NULL;
}
/* Build a space separated list of parameters, and terminate */
char *GRFBuildParamList(char *dst, const GRFConfig *c, const char *last)
{
uint i;
/* Return an empty string if there are no parameters */
if (c->num_params == 0) return strecpy(dst, "", last);
for (i = 0; i < c->num_params; i++) {
if (i > 0) dst = strecpy(dst, " ", last);
dst += snprintf(dst, last - dst, "%d", c->param[i]);
}
return dst;
}
static const SaveLoad _grfconfig_desc[] = {
SLE_STR(GRFConfig, filename, SLE_STR, 0x40),
SLE_VAR(GRFConfig, grfid, SLE_UINT32),
SLE_ARR(GRFConfig, md5sum, SLE_UINT8, 16),
SLE_ARR(GRFConfig, param, SLE_UINT32, 0x80),
SLE_VAR(GRFConfig, num_params, SLE_UINT8),
SLE_END()
};
static void Save_NGRF()
{
int index = 0;
for (GRFConfig *c = _grfconfig; c != NULL; c = c->next) {
if (HASBIT(c->flags, GCF_STATIC)) continue;
SlSetArrayIndex(index++);
SlObject(c, _grfconfig_desc);
}
}
static void Load_NGRF()
{
ClearGRFConfigList(&_grfconfig);
while (SlIterateArray() != -1) {
GRFConfig *c = CallocT<GRFConfig>(1);
SlObject(c, _grfconfig_desc);
AppendToGRFConfigList(&_grfconfig, c);
}
/* Append static NewGRF configuration */
AppendStaticGRFConfigs(&_grfconfig);
}
extern const ChunkHandler _newgrf_chunk_handlers[] = {
{ 'NGRF', Save_NGRF, Load_NGRF, CH_ARRAY | CH_LAST }
};
|