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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
00302 static bool CalcGRFMD5Sum(GRFConfig *config, Subdirectory subdir)
00303 {
00304 FILE *f;
00305 Md5 checksum;
00306 uint8 buffer[1024];
00307 size_t len, size;
00308
00309
00310 f = FioFOpenFile(config->filename, "rb", subdir, &size);
00311 if (f == NULL) return false;
00312
00313
00314 while ((len = fread(buffer, 1, (size > sizeof(buffer)) ? sizeof(buffer) : size, f)) != 0 && size != 0) {
00315 size -= len;
00316 checksum.Append(buffer, len);
00317 }
00318 checksum.Finish(config->ident.md5sum);
00319
00320 FioFCloseFile(f);
00321
00322 return true;
00323 }
00324
00325
00333 bool FillGRFDetails(GRFConfig *config, bool is_static, Subdirectory subdir)
00334 {
00335 if (!FioCheckFileExists(config->filename, subdir)) {
00336 config->status = GCS_NOT_FOUND;
00337 return false;
00338 }
00339
00340
00341 LoadNewGRFFile(config, CONFIG_SLOT, GLS_FILESCAN, subdir);
00342 config->SetSuitablePalette();
00343
00344
00345 if (config->ident.grfid == 0 || config->ident.grfid == 0xFFFFFFFF || config->IsOpenTTDBaseGRF()) return false;
00346
00347 if (is_static) {
00348
00349 LoadNewGRFFile(config, 62, GLS_SAFETYSCAN, subdir);
00350
00351
00352 if (HasBit(config->flags, GCF_UNSAFE)) return false;
00353 }
00354
00355 return CalcGRFMD5Sum(config, subdir);
00356 }
00357
00358
00364 void ClearGRFConfigList(GRFConfig **config)
00365 {
00366 GRFConfig *c, *next;
00367 for (c = *config; c != NULL; c = next) {
00368 next = c->next;
00369 delete c;
00370 }
00371 *config = NULL;
00372 }
00373
00374
00382 GRFConfig **CopyGRFConfigList(GRFConfig **dst, const GRFConfig *src, bool init_only)
00383 {
00384
00385 ClearGRFConfigList(dst);
00386 for (; src != NULL; src = src->next) {
00387 GRFConfig *c = new GRFConfig(*src);
00388
00389 ClrBit(c->flags, GCF_INIT_ONLY);
00390 if (init_only) SetBit(c->flags, GCF_INIT_ONLY);
00391
00392 *dst = c;
00393 dst = &c->next;
00394 }
00395
00396 return dst;
00397 }
00398
00412 static void RemoveDuplicatesFromGRFConfigList(GRFConfig *list)
00413 {
00414 GRFConfig *prev;
00415 GRFConfig *cur;
00416
00417 if (list == NULL) return;
00418
00419 for (prev = list, cur = list->next; cur != NULL; prev = cur, cur = cur->next) {
00420 if (cur->ident.grfid != list->ident.grfid) continue;
00421
00422 prev->next = cur->next;
00423 delete cur;
00424 cur = prev;
00425 }
00426
00427 RemoveDuplicatesFromGRFConfigList(list->next);
00428 }
00429
00434 void AppendStaticGRFConfigs(GRFConfig **dst)
00435 {
00436 GRFConfig **tail = dst;
00437 while (*tail != NULL) tail = &(*tail)->next;
00438
00439 CopyGRFConfigList(tail, _grfconfig_static, false);
00440 RemoveDuplicatesFromGRFConfigList(*dst);
00441 }
00442
00448 void AppendToGRFConfigList(GRFConfig **dst, GRFConfig *el)
00449 {
00450 GRFConfig **tail = dst;
00451 while (*tail != NULL) tail = &(*tail)->next;
00452 *tail = el;
00453
00454 RemoveDuplicatesFromGRFConfigList(*dst);
00455 }
00456
00457
00459 void ResetGRFConfig(bool defaults)
00460 {
00461 CopyGRFConfigList(&_grfconfig, _grfconfig_newgame, !defaults);
00462 AppendStaticGRFConfigs(&_grfconfig);
00463 }
00464
00465
00477 GRFListCompatibility IsGoodGRFConfigList(GRFConfig *grfconfig)
00478 {
00479 GRFListCompatibility res = GLC_ALL_GOOD;
00480
00481 for (GRFConfig *c = grfconfig; c != NULL; c = c->next) {
00482 const GRFConfig *f = FindGRFConfig(c->ident.grfid, FGCM_EXACT, c->ident.md5sum);
00483 if (f == NULL || HasBit(f->flags, GCF_INVALID)) {
00484 char buf[256];
00485
00486
00487
00488 f = FindGRFConfig(c->ident.grfid, FGCM_COMPATIBLE, NULL, c->version);
00489 if (f != NULL) {
00490 md5sumToString(buf, lastof(buf), c->ident.md5sum);
00491 DEBUG(grf, 1, "NewGRF %08X (%s) not found; checksum %s. Compatibility mode on", BSWAP32(c->ident.grfid), c->filename, buf);
00492 if (!HasBit(c->flags, GCF_COMPATIBLE)) {
00493
00494 SetBit(c->flags, GCF_COMPATIBLE);
00495 memcpy(c->original_md5sum, c->ident.md5sum, sizeof(c->original_md5sum));
00496 }
00497
00498
00499 if (res != GLC_NOT_FOUND) res = GLC_COMPATIBLE;
00500 goto compatible_grf;
00501 }
00502
00503
00504 md5sumToString(buf, lastof(buf), c->ident.md5sum);
00505 DEBUG(grf, 0, "NewGRF %08X (%s) not found; checksum %s", BSWAP32(c->ident.grfid), c->filename, buf);
00506
00507 c->status = GCS_NOT_FOUND;
00508 res = GLC_NOT_FOUND;
00509 } else {
00510 compatible_grf:
00511 DEBUG(grf, 1, "Loading GRF %08X from %s", BSWAP32(f->ident.grfid), f->filename);
00512
00513
00514
00515
00516
00517 if (!HasBit(c->flags, GCF_COPY)) {
00518 free(c->filename);
00519 c->filename = strdup(f->filename);
00520 memcpy(c->ident.md5sum, f->ident.md5sum, sizeof(c->ident.md5sum));
00521 c->name->Release();
00522 c->name = f->name;
00523 c->name->AddRef();
00524 c->info->Release();
00525 c->info = f->name;
00526 c->info->AddRef();
00527 c->error = NULL;
00528 c->version = f->version;
00529 c->min_loadable_version = f->min_loadable_version;
00530 c->num_valid_params = f->num_valid_params;
00531 c->has_param_defaults = f->has_param_defaults;
00532 for (uint i = 0; i < f->param_info.Length(); i++) {
00533 if (f->param_info[i] == NULL) {
00534 *c->param_info.Append() = NULL;
00535 } else {
00536 *c->param_info.Append() = new GRFParameterInfo(*f->param_info[i]);
00537 }
00538 }
00539 }
00540 }
00541 }
00542
00543 return res;
00544 }
00545
00547 class GRFFileScanner : FileScanner {
00548 uint next_update;
00549 uint num_scanned;
00550
00551 public:
00552 GRFFileScanner() : next_update(_realtime_tick), num_scanned(0)
00553 {
00554 }
00555
00556 bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename);
00557
00559 static uint DoScan()
00560 {
00561 GRFFileScanner fs;
00562 int ret = fs.Scan(".grf", NEWGRF_DIR);
00563
00564
00565 _settings_client.gui.last_newgrf_count = fs.num_scanned;
00566 return ret;
00567 }
00568 };
00569
00570 bool GRFFileScanner::AddFile(const char *filename, size_t basepath_length, const char *tar_filename)
00571 {
00572 GRFConfig *c = new GRFConfig(filename + basepath_length);
00573
00574 bool added = true;
00575 if (FillGRFDetails(c, false)) {
00576 if (_all_grfs == NULL) {
00577 _all_grfs = c;
00578 } else {
00579
00580
00581 GRFConfig **pd, *d;
00582 bool stop = false;
00583 for (pd = &_all_grfs; (d = *pd) != NULL; pd = &d->next) {
00584 if (c->ident.grfid == d->ident.grfid && memcmp(c->ident.md5sum, d->ident.md5sum, sizeof(c->ident.md5sum)) == 0) added = false;
00585
00586
00587
00588 if (strcasecmp(c->GetName(), d->GetName()) <= 0) {
00589 stop = true;
00590 } else if (stop) {
00591 break;
00592 }
00593 }
00594 if (added) {
00595 c->next = d;
00596 *pd = c;
00597 }
00598 }
00599 } else {
00600 added = false;
00601 }
00602
00603 this->num_scanned++;
00604 if (this->next_update <= _realtime_tick) {
00605 _modal_progress_work_mutex->EndCritical();
00606 _modal_progress_paint_mutex->BeginCritical();
00607
00608 const char *name = NULL;
00609 if (c->name != NULL) name = GetGRFStringFromGRFText(c->name->text);
00610 if (name == NULL) name = c->filename;
00611 UpdateNewGRFScanStatus(this->num_scanned, name);
00612
00613 _modal_progress_work_mutex->BeginCritical();
00614 _modal_progress_paint_mutex->EndCritical();
00615
00616 this->next_update = _realtime_tick + 200;
00617 }
00618
00619 if (!added) {
00620
00621
00622 delete c;
00623 }
00624
00625 return added;
00626 }
00627
00634 static int CDECL GRFSorter(GRFConfig * const *p1, GRFConfig * const *p2)
00635 {
00636 const GRFConfig *c1 = *p1;
00637 const GRFConfig *c2 = *p2;
00638
00639 return strcasecmp(c1->GetName(), c2->GetName());
00640 }
00641
00646 void DoScanNewGRFFiles(void *callback)
00647 {
00648 _modal_progress_work_mutex->BeginCritical();
00649
00650 ClearGRFConfigList(&_all_grfs);
00651 TarScanner::DoScan(TarScanner::NEWGRF);
00652
00653 DEBUG(grf, 1, "Scanning for NewGRFs");
00654 uint num = GRFFileScanner::DoScan();
00655
00656 DEBUG(grf, 1, "Scan complete, found %d files", num);
00657 if (num != 0 && _all_grfs != NULL) {
00658
00659
00660
00661 GRFConfig **to_sort = MallocT<GRFConfig*>(num);
00662
00663 uint i = 0;
00664 for (GRFConfig *p = _all_grfs; p != NULL; p = p->next, i++) {
00665 to_sort[i] = p;
00666 }
00667
00668 num = i;
00669
00670 QSortT(to_sort, num, &GRFSorter);
00671
00672 for (i = 1; i < num; i++) {
00673 to_sort[i - 1]->next = to_sort[i];
00674 }
00675 to_sort[num - 1]->next = NULL;
00676 _all_grfs = to_sort[0];
00677
00678 free(to_sort);
00679
00680 #ifdef ENABLE_NETWORK
00681 NetworkAfterNewGRFScan();
00682 #endif
00683 }
00684
00685 _modal_progress_work_mutex->EndCritical();
00686 _modal_progress_paint_mutex->BeginCritical();
00687
00688
00689 InvalidateWindowClassesData(WC_SAVELOAD, 0, true);
00690 InvalidateWindowData(WC_GAME_OPTIONS, WN_GAME_OPTIONS_NEWGRF_STATE, GOID_NEWGRF_RESCANNED, true);
00691 if (callback != NULL) ((NewGRFScanCallback*)callback)->OnNewGRFsScanned();
00692
00693 DeleteWindowByClass(WC_MODAL_PROGRESS);
00694 SetModalProgress(false);
00695 MarkWholeScreenDirty();
00696 _modal_progress_paint_mutex->EndCritical();
00697 }
00698
00703 void ScanNewGRFFiles(NewGRFScanCallback *callback)
00704 {
00705
00706 SetModalProgress(true);
00707
00708 MarkWholeScreenDirty();
00709
00710 if (!_video_driver->HasGUI() || !ThreadObject::New(&DoScanNewGRFFiles, callback, NULL)) {
00711 _modal_progress_work_mutex->EndCritical();
00712 _modal_progress_paint_mutex->EndCritical();
00713 DoScanNewGRFFiles(callback);
00714 _modal_progress_paint_mutex->BeginCritical();
00715 _modal_progress_work_mutex->BeginCritical();
00716 } else {
00717 UpdateNewGRFScanStatus(0, NULL);
00718 }
00719 }
00720
00729 const GRFConfig *FindGRFConfig(uint32 grfid, FindGRFConfigMode mode, const uint8 *md5sum, uint32 desired_version)
00730 {
00731 assert((mode == FGCM_EXACT) != (md5sum == NULL));
00732 const GRFConfig *best = NULL;
00733 for (const GRFConfig *c = _all_grfs; c != NULL; c = c->next) {
00734
00735 if (!c->ident.HasGrfIdentifier(grfid, md5sum)) continue;
00736
00737 if (md5sum != NULL || mode == FGCM_ANY) return c;
00738
00739 if (mode != FGCM_NEWEST && HasBit(c->flags, GCF_INVALID)) continue;
00740
00741 if (mode == FGCM_COMPATIBLE && (c->version < desired_version || c->min_loadable_version > desired_version)) continue;
00742
00743 if (best == NULL || c->version > best->version) best = c;
00744 }
00745
00746 return best;
00747 }
00748
00749 #ifdef ENABLE_NETWORK
00750
00752 struct UnknownGRF : public GRFIdentifier {
00753 UnknownGRF *next;
00754 GRFTextWrapper *name;
00755 };
00756
00774 GRFTextWrapper *FindUnknownGRFName(uint32 grfid, uint8 *md5sum, bool create)
00775 {
00776 UnknownGRF *grf;
00777 static UnknownGRF *unknown_grfs = NULL;
00778
00779 for (grf = unknown_grfs; grf != NULL; grf = grf->next) {
00780 if (grf->grfid == grfid) {
00781 if (memcmp(md5sum, grf->md5sum, sizeof(grf->md5sum)) == 0) return grf->name;
00782 }
00783 }
00784
00785 if (!create) return NULL;
00786
00787 grf = CallocT<UnknownGRF>(1);
00788 grf->grfid = grfid;
00789 grf->next = unknown_grfs;
00790 grf->name = new GRFTextWrapper();
00791 grf->name->AddRef();
00792
00793 AddGRFTextToList(&grf->name->text, UNKNOWN_GRF_NAME_PLACEHOLDER);
00794 memcpy(grf->md5sum, md5sum, sizeof(grf->md5sum));
00795
00796 unknown_grfs = grf;
00797 return grf->name;
00798 }
00799
00800 #endif
00801
00802
00809 GRFConfig *GetGRFConfig(uint32 grfid, uint32 mask)
00810 {
00811 GRFConfig *c;
00812
00813 for (c = _grfconfig; c != NULL; c = c->next) {
00814 if ((c->ident.grfid & mask) == (grfid & mask)) return c;
00815 }
00816
00817 return NULL;
00818 }
00819
00820
00822 char *GRFBuildParamList(char *dst, const GRFConfig *c, const char *last)
00823 {
00824 uint i;
00825
00826
00827 if (c->num_params == 0) return strecpy(dst, "", last);
00828
00829 for (i = 0; i < c->num_params; i++) {
00830 if (i > 0) dst = strecpy(dst, " ", last);
00831 dst += seprintf(dst, last, "%d", c->param[i]);
00832 }
00833 return dst;
00834 }
00835
00837 static const uint32 OPENTTD_GRAPHICS_BASE_GRF_ID = BSWAP32(0xFF4F5400);
00838
00843 bool GRFConfig::IsOpenTTDBaseGRF() const
00844 {
00845 return (this->ident.grfid & 0x00FFFFFF) == OPENTTD_GRAPHICS_BASE_GRF_ID;
00846 }
00847
00853 const char *GRFConfig::GetTextfile(TextfileType type) const
00854 {
00855 static const char * const prefixes[] = {
00856 "readme",
00857 "changelog",
00858 "license",
00859 };
00860 assert_compile(lengthof(prefixes) == TFT_END);
00861
00862 const char *prefix = prefixes[type];
00863
00864 if (this->filename == NULL) return NULL;
00865
00866 static char file_path[MAX_PATH];
00867 strecpy(file_path, this->filename, lastof(file_path));
00868
00869 char *slash = strrchr(file_path, PATHSEPCHAR);
00870 if (slash == NULL) return NULL;
00871
00872 seprintf(slash + 1, lastof(file_path), "%s_%s.txt", prefix, GetCurrentLanguageIsoCode());
00873 if (FioCheckFileExists(file_path, NEWGRF_DIR)) return file_path;
00874
00875 seprintf(slash + 1, lastof(file_path), "%s_%.2s.txt", prefix, GetCurrentLanguageIsoCode());
00876 if (FioCheckFileExists(file_path, NEWGRF_DIR)) return file_path;
00877
00878 seprintf(slash + 1, lastof(file_path), "%s.txt", prefix);
00879 return FioCheckFileExists(file_path, NEWGRF_DIR) ? file_path : NULL;
00880 }