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00012 #include "stdafx.h"
00013 #include "debug.h"
00014 #include "3rdparty/md5/md5.h"
00015 #include "newgrf.h"
00016 #include "network/network_func.h"
00017 #include "gfx_func.h"
00018 #include "newgrf_text.h"
00019 #include "window_func.h"
00020 #include "progress.h"
00021 #include "video/video_driver.hpp"
00022 #include "strings_func.h"
00023
00024 #include "fileio_func.h"
00025 #include "fios.h"
00026
00028 GRFTextWrapper::GRFTextWrapper() :
00029 text(NULL)
00030 {
00031 }
00032
00034 GRFTextWrapper::~GRFTextWrapper()
00035 {
00036 CleanUpGRFText(this->text);
00037 }
00038
00044 GRFConfig::GRFConfig(const char *filename) :
00045 name(new GRFTextWrapper()),
00046 info(new GRFTextWrapper()),
00047 url(new GRFTextWrapper()),
00048 num_valid_params(lengthof(param))
00049 {
00050 if (filename != NULL) this->filename = strdup(filename);
00051 this->name->AddRef();
00052 this->info->AddRef();
00053 this->url->AddRef();
00054 }
00055
00060 GRFConfig::GRFConfig(const GRFConfig &config) :
00061 ZeroedMemoryAllocator(),
00062 ident(config.ident),
00063 name(config.name),
00064 info(config.info),
00065 url(config.url),
00066 version(config.version),
00067 min_loadable_version(config.min_loadable_version),
00068 flags(config.flags & ~(1 << GCF_COPY)),
00069 status(config.status),
00070 grf_bugs(config.grf_bugs),
00071 num_params(config.num_params),
00072 num_valid_params(config.num_valid_params),
00073 palette(config.palette),
00074 has_param_defaults(config.has_param_defaults)
00075 {
00076 MemCpyT<uint8>(this->original_md5sum, config.original_md5sum, lengthof(this->original_md5sum));
00077 MemCpyT<uint32>(this->param, config.param, lengthof(this->param));
00078 if (config.filename != NULL) this->filename = strdup(config.filename);
00079 this->name->AddRef();
00080 this->info->AddRef();
00081 this->url->AddRef();
00082 if (config.error != NULL) this->error = new GRFError(*config.error);
00083 for (uint i = 0; i < config.param_info.Length(); i++) {
00084 if (config.param_info[i] == NULL) {
00085 *this->param_info.Append() = NULL;
00086 } else {
00087 *this->param_info.Append() = new GRFParameterInfo(*config.param_info[i]);
00088 }
00089 }
00090 }
00091
00093 GRFConfig::~GRFConfig()
00094 {
00095
00096 if (!HasBit(this->flags, GCF_COPY)) {
00097 free(this->filename);
00098 delete this->error;
00099 }
00100 this->name->Release();
00101 this->info->Release();
00102 this->url->Release();
00103
00104 for (uint i = 0; i < this->param_info.Length(); i++) delete this->param_info[i];
00105 }
00106
00112 const char *GRFConfig::GetName() const
00113 {
00114 const char *name = GetGRFStringFromGRFText(this->name->text);
00115 return StrEmpty(name) ? this->filename : name;
00116 }
00117
00122 const char *GRFConfig::GetDescription() const
00123 {
00124 return GetGRFStringFromGRFText(this->info->text);
00125 }
00126
00131 const char *GRFConfig::GetURL() const
00132 {
00133 return GetGRFStringFromGRFText(this->url->text);
00134 }
00135
00137 void GRFConfig::SetParameterDefaults()
00138 {
00139 this->num_params = 0;
00140 MemSetT<uint32>(this->param, 0, lengthof(this->param));
00141
00142 if (!this->has_param_defaults) return;
00143
00144 for (uint i = 0; i < this->param_info.Length(); i++) {
00145 if (this->param_info[i] == NULL) continue;
00146 this->param_info[i]->SetValue(this, this->param_info[i]->def_value);
00147 }
00148 }
00149
00155 void GRFConfig::SetSuitablePalette()
00156 {
00157 PaletteType pal;
00158 switch (this->palette & GRFP_GRF_MASK) {
00159 case GRFP_GRF_DOS: pal = PAL_DOS; break;
00160 case GRFP_GRF_WINDOWS: pal = PAL_WINDOWS; break;
00161 default: pal = _settings_client.gui.newgrf_default_palette == 1 ? PAL_WINDOWS : PAL_DOS; break;
00162 }
00163 SB(this->palette, GRFP_USE_BIT, 1, pal == PAL_WINDOWS ? GRFP_USE_WINDOWS : GRFP_USE_DOS);
00164 }
00165
00166 GRFConfig *_all_grfs;
00167 GRFConfig *_grfconfig;
00168 GRFConfig *_grfconfig_newgame;
00169 GRFConfig *_grfconfig_static;
00170
00176 GRFError::GRFError(StringID severity, StringID message) :
00177 message(message),
00178 severity(severity)
00179 {
00180 }
00181
00186 GRFError::GRFError(const GRFError &error) :
00187 ZeroedMemoryAllocator(),
00188 custom_message(error.custom_message),
00189 data(error.data),
00190 message(error.message),
00191 severity(error.severity)
00192 {
00193 if (error.custom_message != NULL) this->custom_message = strdup(error.custom_message);
00194 if (error.data != NULL) this->data = strdup(error.data);
00195 memcpy(this->param_value, error.param_value, sizeof(this->param_value));
00196 }
00197
00198 GRFError::~GRFError()
00199 {
00200 free(this->custom_message);
00201 free(this->data);
00202 }
00203
00208 GRFParameterInfo::GRFParameterInfo(uint nr) :
00209 name(NULL),
00210 desc(NULL),
00211 type(PTYPE_UINT_ENUM),
00212 min_value(0),
00213 max_value(UINT32_MAX),
00214 def_value(0),
00215 param_nr(nr),
00216 first_bit(0),
00217 num_bit(32)
00218 {}
00219
00225 GRFParameterInfo::GRFParameterInfo(GRFParameterInfo &info) :
00226 name(DuplicateGRFText(info.name)),
00227 desc(DuplicateGRFText(info.desc)),
00228 type(info.type),
00229 min_value(info.min_value),
00230 max_value(info.max_value),
00231 def_value(info.def_value),
00232 param_nr(info.param_nr),
00233 first_bit(info.first_bit),
00234 num_bit(info.num_bit)
00235 {
00236 for (uint i = 0; i < info.value_names.Length(); i++) {
00237 SmallPair<uint32, GRFText *> *data = info.value_names.Get(i);
00238 this->value_names.Insert(data->first, DuplicateGRFText(data->second));
00239 }
00240 }
00241
00243 GRFParameterInfo::~GRFParameterInfo()
00244 {
00245 CleanUpGRFText(this->name);
00246 CleanUpGRFText(this->desc);
00247 for (uint i = 0; i < this->value_names.Length(); i++) {
00248 SmallPair<uint32, GRFText *> *data = this->value_names.Get(i);
00249 CleanUpGRFText(data->second);
00250 }
00251 }
00252
00258 uint32 GRFParameterInfo::GetValue(struct GRFConfig *config) const
00259 {
00260
00261 if (this->num_bit == 32) return config->param[this->param_nr];
00262 return GB(config->param[this->param_nr], this->first_bit, this->num_bit);
00263 }
00264
00270 void GRFParameterInfo::SetValue(struct GRFConfig *config, uint32 value)
00271 {
00272
00273 if (this->num_bit == 32) {
00274 config->param[this->param_nr] = value;
00275 } else {
00276 SB(config->param[this->param_nr], this->first_bit, this->num_bit, value);
00277 }
00278 config->num_params = max<uint>(config->num_params, this->param_nr + 1);
00279 SetWindowDirty(WC_GAME_OPTIONS, WN_GAME_OPTIONS_NEWGRF_STATE);
00280 }
00281
00288 bool UpdateNewGRFConfigPalette(int32 p1)
00289 {
00290 for (GRFConfig *c = _grfconfig_newgame; c != NULL; c = c->next) c->SetSuitablePalette();
00291 for (GRFConfig *c = _grfconfig_static; c != NULL; c = c->next) c->SetSuitablePalette();
00292 for (GRFConfig *c = _all_grfs; c != NULL; c = c->next) c->SetSuitablePalette();
00293 return true;
00294 }
00295
00301 size_t GRFGetSizeOfDataSection(FILE *f)
00302 {
00303 extern const byte _grf_cont_v2_sig[];
00304 static const uint header_len = 14;
00305
00306 byte data[header_len];
00307 if (fread(data, 1, header_len, f) == header_len) {
00308 if (data[0] == 0 && data[1] == 0 && MemCmpT(data + 2, _grf_cont_v2_sig, 8) == 0) {
00309
00310 size_t offset = (data[13] << 24) | (data[12] << 16) | (data[11] << 8) | data[10];
00311 return header_len + offset;
00312 }
00313 }
00314
00315 return SIZE_MAX;
00316 }
00317
00324 static bool CalcGRFMD5Sum(GRFConfig *config, Subdirectory subdir)
00325 {
00326 FILE *f;
00327 Md5 checksum;
00328 uint8 buffer[1024];
00329 size_t len, size;
00330
00331
00332 f = FioFOpenFile(config->filename, "rb", subdir, &size);
00333 if (f == NULL) return false;
00334
00335 size_t start = ftell(f);
00336 size = min(size, GRFGetSizeOfDataSection(f));
00337 fseek(f, start, SEEK_SET);
00338
00339
00340 while ((len = fread(buffer, 1, (size > sizeof(buffer)) ? sizeof(buffer) : size, f)) != 0 && size != 0) {
00341 size -= len;
00342 checksum.Append(buffer, len);
00343 }
00344 checksum.Finish(config->ident.md5sum);
00345
00346 FioFCloseFile(f);
00347
00348 return true;
00349 }
00350
00351
00359 bool FillGRFDetails(GRFConfig *config, bool is_static, Subdirectory subdir)
00360 {
00361 if (!FioCheckFileExists(config->filename, subdir)) {
00362 config->status = GCS_NOT_FOUND;
00363 return false;
00364 }
00365
00366
00367 LoadNewGRFFile(config, CONFIG_SLOT, GLS_FILESCAN, subdir);
00368 config->SetSuitablePalette();
00369
00370
00371 if (config->ident.grfid == 0 || config->ident.grfid == 0xFFFFFFFF || config->IsOpenTTDBaseGRF()) return false;
00372
00373 if (is_static) {
00374
00375 LoadNewGRFFile(config, 62, GLS_SAFETYSCAN, subdir);
00376
00377
00378 if (HasBit(config->flags, GCF_UNSAFE)) return false;
00379 }
00380
00381 return CalcGRFMD5Sum(config, subdir);
00382 }
00383
00384
00390 void ClearGRFConfigList(GRFConfig **config)
00391 {
00392 GRFConfig *c, *next;
00393 for (c = *config; c != NULL; c = next) {
00394 next = c->next;
00395 delete c;
00396 }
00397 *config = NULL;
00398 }
00399
00400
00408 GRFConfig **CopyGRFConfigList(GRFConfig **dst, const GRFConfig *src, bool init_only)
00409 {
00410
00411 ClearGRFConfigList(dst);
00412 for (; src != NULL; src = src->next) {
00413 GRFConfig *c = new GRFConfig(*src);
00414
00415 ClrBit(c->flags, GCF_INIT_ONLY);
00416 if (init_only) SetBit(c->flags, GCF_INIT_ONLY);
00417
00418 *dst = c;
00419 dst = &c->next;
00420 }
00421
00422 return dst;
00423 }
00424
00438 static void RemoveDuplicatesFromGRFConfigList(GRFConfig *list)
00439 {
00440 GRFConfig *prev;
00441 GRFConfig *cur;
00442
00443 if (list == NULL) return;
00444
00445 for (prev = list, cur = list->next; cur != NULL; prev = cur, cur = cur->next) {
00446 if (cur->ident.grfid != list->ident.grfid) continue;
00447
00448 prev->next = cur->next;
00449 delete cur;
00450 cur = prev;
00451 }
00452
00453 RemoveDuplicatesFromGRFConfigList(list->next);
00454 }
00455
00460 void AppendStaticGRFConfigs(GRFConfig **dst)
00461 {
00462 GRFConfig **tail = dst;
00463 while (*tail != NULL) tail = &(*tail)->next;
00464
00465 CopyGRFConfigList(tail, _grfconfig_static, false);
00466 RemoveDuplicatesFromGRFConfigList(*dst);
00467 }
00468
00474 void AppendToGRFConfigList(GRFConfig **dst, GRFConfig *el)
00475 {
00476 GRFConfig **tail = dst;
00477 while (*tail != NULL) tail = &(*tail)->next;
00478 *tail = el;
00479
00480 RemoveDuplicatesFromGRFConfigList(*dst);
00481 }
00482
00483
00485 void ResetGRFConfig(bool defaults)
00486 {
00487 CopyGRFConfigList(&_grfconfig, _grfconfig_newgame, !defaults);
00488 AppendStaticGRFConfigs(&_grfconfig);
00489 }
00490
00491
00503 GRFListCompatibility IsGoodGRFConfigList(GRFConfig *grfconfig)
00504 {
00505 GRFListCompatibility res = GLC_ALL_GOOD;
00506
00507 for (GRFConfig *c = grfconfig; c != NULL; c = c->next) {
00508 const GRFConfig *f = FindGRFConfig(c->ident.grfid, FGCM_EXACT, c->ident.md5sum);
00509 if (f == NULL || HasBit(f->flags, GCF_INVALID)) {
00510 char buf[256];
00511
00512
00513
00514 f = FindGRFConfig(c->ident.grfid, FGCM_COMPATIBLE, NULL, c->version);
00515 if (f != NULL) {
00516 md5sumToString(buf, lastof(buf), c->ident.md5sum);
00517 DEBUG(grf, 1, "NewGRF %08X (%s) not found; checksum %s. Compatibility mode on", BSWAP32(c->ident.grfid), c->filename, buf);
00518 if (!HasBit(c->flags, GCF_COMPATIBLE)) {
00519
00520 SetBit(c->flags, GCF_COMPATIBLE);
00521 memcpy(c->original_md5sum, c->ident.md5sum, sizeof(c->original_md5sum));
00522 }
00523
00524
00525 if (res != GLC_NOT_FOUND) res = GLC_COMPATIBLE;
00526 goto compatible_grf;
00527 }
00528
00529
00530 md5sumToString(buf, lastof(buf), c->ident.md5sum);
00531 DEBUG(grf, 0, "NewGRF %08X (%s) not found; checksum %s", BSWAP32(c->ident.grfid), c->filename, buf);
00532
00533 c->status = GCS_NOT_FOUND;
00534 res = GLC_NOT_FOUND;
00535 } else {
00536 compatible_grf:
00537 DEBUG(grf, 1, "Loading GRF %08X from %s", BSWAP32(f->ident.grfid), f->filename);
00538
00539
00540
00541
00542
00543 if (!HasBit(c->flags, GCF_COPY)) {
00544 free(c->filename);
00545 c->filename = strdup(f->filename);
00546 memcpy(c->ident.md5sum, f->ident.md5sum, sizeof(c->ident.md5sum));
00547 c->name->Release();
00548 c->name = f->name;
00549 c->name->AddRef();
00550 c->info->Release();
00551 c->info = f->name;
00552 c->info->AddRef();
00553 c->error = NULL;
00554 c->version = f->version;
00555 c->min_loadable_version = f->min_loadable_version;
00556 c->num_valid_params = f->num_valid_params;
00557 c->has_param_defaults = f->has_param_defaults;
00558 for (uint i = 0; i < f->param_info.Length(); i++) {
00559 if (f->param_info[i] == NULL) {
00560 *c->param_info.Append() = NULL;
00561 } else {
00562 *c->param_info.Append() = new GRFParameterInfo(*f->param_info[i]);
00563 }
00564 }
00565 }
00566 }
00567 }
00568
00569 return res;
00570 }
00571
00573 class GRFFileScanner : FileScanner {
00574 uint next_update;
00575 uint num_scanned;
00576
00577 public:
00578 GRFFileScanner() : next_update(_realtime_tick), num_scanned(0)
00579 {
00580 }
00581
00582 bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename);
00583
00585 static uint DoScan()
00586 {
00587 GRFFileScanner fs;
00588 int ret = fs.Scan(".grf", NEWGRF_DIR);
00589
00590
00591 _settings_client.gui.last_newgrf_count = fs.num_scanned;
00592 return ret;
00593 }
00594 };
00595
00596 bool GRFFileScanner::AddFile(const char *filename, size_t basepath_length, const char *tar_filename)
00597 {
00598 GRFConfig *c = new GRFConfig(filename + basepath_length);
00599
00600 bool added = true;
00601 if (FillGRFDetails(c, false)) {
00602 if (_all_grfs == NULL) {
00603 _all_grfs = c;
00604 } else {
00605
00606
00607 GRFConfig **pd, *d;
00608 bool stop = false;
00609 for (pd = &_all_grfs; (d = *pd) != NULL; pd = &d->next) {
00610 if (c->ident.grfid == d->ident.grfid && memcmp(c->ident.md5sum, d->ident.md5sum, sizeof(c->ident.md5sum)) == 0) added = false;
00611
00612
00613
00614 if (strcasecmp(c->GetName(), d->GetName()) <= 0) {
00615 stop = true;
00616 } else if (stop) {
00617 break;
00618 }
00619 }
00620 if (added) {
00621 c->next = d;
00622 *pd = c;
00623 }
00624 }
00625 } else {
00626 added = false;
00627 }
00628
00629 this->num_scanned++;
00630 if (this->next_update <= _realtime_tick) {
00631 _modal_progress_work_mutex->EndCritical();
00632 _modal_progress_paint_mutex->BeginCritical();
00633
00634 const char *name = NULL;
00635 if (c->name != NULL) name = GetGRFStringFromGRFText(c->name->text);
00636 if (name == NULL) name = c->filename;
00637 UpdateNewGRFScanStatus(this->num_scanned, name);
00638
00639 _modal_progress_work_mutex->BeginCritical();
00640 _modal_progress_paint_mutex->EndCritical();
00641
00642 this->next_update = _realtime_tick + 200;
00643 }
00644
00645 if (!added) {
00646
00647
00648 delete c;
00649 }
00650
00651 return added;
00652 }
00653
00660 static int CDECL GRFSorter(GRFConfig * const *p1, GRFConfig * const *p2)
00661 {
00662 const GRFConfig *c1 = *p1;
00663 const GRFConfig *c2 = *p2;
00664
00665 return strcasecmp(c1->GetName(), c2->GetName());
00666 }
00667
00672 void DoScanNewGRFFiles(void *callback)
00673 {
00674 _modal_progress_work_mutex->BeginCritical();
00675
00676 ClearGRFConfigList(&_all_grfs);
00677 TarScanner::DoScan(TarScanner::NEWGRF);
00678
00679 DEBUG(grf, 1, "Scanning for NewGRFs");
00680 uint num = GRFFileScanner::DoScan();
00681
00682 DEBUG(grf, 1, "Scan complete, found %d files", num);
00683 if (num != 0 && _all_grfs != NULL) {
00684
00685
00686
00687 GRFConfig **to_sort = MallocT<GRFConfig*>(num);
00688
00689 uint i = 0;
00690 for (GRFConfig *p = _all_grfs; p != NULL; p = p->next, i++) {
00691 to_sort[i] = p;
00692 }
00693
00694 num = i;
00695
00696 QSortT(to_sort, num, &GRFSorter);
00697
00698 for (i = 1; i < num; i++) {
00699 to_sort[i - 1]->next = to_sort[i];
00700 }
00701 to_sort[num - 1]->next = NULL;
00702 _all_grfs = to_sort[0];
00703
00704 free(to_sort);
00705
00706 #ifdef ENABLE_NETWORK
00707 NetworkAfterNewGRFScan();
00708 #endif
00709 }
00710
00711 _modal_progress_work_mutex->EndCritical();
00712 _modal_progress_paint_mutex->BeginCritical();
00713
00714
00715 InvalidateWindowClassesData(WC_SAVELOAD, 0, true);
00716 InvalidateWindowData(WC_GAME_OPTIONS, WN_GAME_OPTIONS_NEWGRF_STATE, GOID_NEWGRF_RESCANNED, true);
00717 if (callback != NULL) ((NewGRFScanCallback*)callback)->OnNewGRFsScanned();
00718
00719 DeleteWindowByClass(WC_MODAL_PROGRESS);
00720 SetModalProgress(false);
00721 MarkWholeScreenDirty();
00722 _modal_progress_paint_mutex->EndCritical();
00723 }
00724
00729 void ScanNewGRFFiles(NewGRFScanCallback *callback)
00730 {
00731
00732 SetModalProgress(true);
00733
00734 MarkWholeScreenDirty();
00735
00736 if (!_video_driver->HasGUI() || !ThreadObject::New(&DoScanNewGRFFiles, callback, NULL)) {
00737 _modal_progress_work_mutex->EndCritical();
00738 _modal_progress_paint_mutex->EndCritical();
00739 DoScanNewGRFFiles(callback);
00740 _modal_progress_paint_mutex->BeginCritical();
00741 _modal_progress_work_mutex->BeginCritical();
00742 } else {
00743 UpdateNewGRFScanStatus(0, NULL);
00744 }
00745 }
00746
00755 const GRFConfig *FindGRFConfig(uint32 grfid, FindGRFConfigMode mode, const uint8 *md5sum, uint32 desired_version)
00756 {
00757 assert((mode == FGCM_EXACT) != (md5sum == NULL));
00758 const GRFConfig *best = NULL;
00759 for (const GRFConfig *c = _all_grfs; c != NULL; c = c->next) {
00760
00761 if (!c->ident.HasGrfIdentifier(grfid, md5sum)) continue;
00762
00763 if (md5sum != NULL || mode == FGCM_ANY) return c;
00764
00765 if (mode != FGCM_NEWEST && HasBit(c->flags, GCF_INVALID)) continue;
00766
00767 if (mode == FGCM_COMPATIBLE && (c->version < desired_version || c->min_loadable_version > desired_version)) continue;
00768
00769 if (best == NULL || c->version > best->version) best = c;
00770 }
00771
00772 return best;
00773 }
00774
00775 #ifdef ENABLE_NETWORK
00776
00778 struct UnknownGRF : public GRFIdentifier {
00779 UnknownGRF *next;
00780 GRFTextWrapper *name;
00781 };
00782
00800 GRFTextWrapper *FindUnknownGRFName(uint32 grfid, uint8 *md5sum, bool create)
00801 {
00802 UnknownGRF *grf;
00803 static UnknownGRF *unknown_grfs = NULL;
00804
00805 for (grf = unknown_grfs; grf != NULL; grf = grf->next) {
00806 if (grf->grfid == grfid) {
00807 if (memcmp(md5sum, grf->md5sum, sizeof(grf->md5sum)) == 0) return grf->name;
00808 }
00809 }
00810
00811 if (!create) return NULL;
00812
00813 grf = CallocT<UnknownGRF>(1);
00814 grf->grfid = grfid;
00815 grf->next = unknown_grfs;
00816 grf->name = new GRFTextWrapper();
00817 grf->name->AddRef();
00818
00819 AddGRFTextToList(&grf->name->text, UNKNOWN_GRF_NAME_PLACEHOLDER);
00820 memcpy(grf->md5sum, md5sum, sizeof(grf->md5sum));
00821
00822 unknown_grfs = grf;
00823 return grf->name;
00824 }
00825
00826 #endif
00827
00828
00835 GRFConfig *GetGRFConfig(uint32 grfid, uint32 mask)
00836 {
00837 GRFConfig *c;
00838
00839 for (c = _grfconfig; c != NULL; c = c->next) {
00840 if ((c->ident.grfid & mask) == (grfid & mask)) return c;
00841 }
00842
00843 return NULL;
00844 }
00845
00846
00848 char *GRFBuildParamList(char *dst, const GRFConfig *c, const char *last)
00849 {
00850 uint i;
00851
00852
00853 if (c->num_params == 0) return strecpy(dst, "", last);
00854
00855 for (i = 0; i < c->num_params; i++) {
00856 if (i > 0) dst = strecpy(dst, " ", last);
00857 dst += seprintf(dst, last, "%d", c->param[i]);
00858 }
00859 return dst;
00860 }
00861
00863 static const uint32 OPENTTD_GRAPHICS_BASE_GRF_ID = BSWAP32(0xFF4F5400);
00864
00869 bool GRFConfig::IsOpenTTDBaseGRF() const
00870 {
00871 return (this->ident.grfid & 0x00FFFFFF) == OPENTTD_GRAPHICS_BASE_GRF_ID;
00872 }
00873
00879 const char *GRFConfig::GetTextfile(TextfileType type) const
00880 {
00881 static const char * const prefixes[] = {
00882 "readme",
00883 "changelog",
00884 "license",
00885 };
00886 assert_compile(lengthof(prefixes) == TFT_END);
00887
00888 const char *prefix = prefixes[type];
00889
00890 if (this->filename == NULL) return NULL;
00891
00892 static char file_path[MAX_PATH];
00893 strecpy(file_path, this->filename, lastof(file_path));
00894
00895 char *slash = strrchr(file_path, PATHSEPCHAR);
00896 if (slash == NULL) return NULL;
00897
00898 seprintf(slash + 1, lastof(file_path), "%s_%s.txt", prefix, GetCurrentLanguageIsoCode());
00899 if (FioCheckFileExists(file_path, NEWGRF_DIR)) return file_path;
00900
00901 seprintf(slash + 1, lastof(file_path), "%s_%.2s.txt", prefix, GetCurrentLanguageIsoCode());
00902 if (FioCheckFileExists(file_path, NEWGRF_DIR)) return file_path;
00903
00904 seprintf(slash + 1, lastof(file_path), "%s.txt", prefix);
00905 return FioCheckFileExists(file_path, NEWGRF_DIR) ? file_path : NULL;
00906 }