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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 num_params(error.num_params)
00193 {
00194 if (error.custom_message != NULL) this->custom_message = strdup(error.custom_message);
00195 if (error.data != NULL) this->data = strdup(error.data);
00196 memcpy(this->param_value, error.param_value, sizeof(this->param_value));
00197 }
00198
00199 GRFError::~GRFError()
00200 {
00201 free(this->custom_message);
00202 free(this->data);
00203 }
00204
00209 GRFParameterInfo::GRFParameterInfo(uint nr) :
00210 name(NULL),
00211 desc(NULL),
00212 type(PTYPE_UINT_ENUM),
00213 min_value(0),
00214 max_value(UINT32_MAX),
00215 def_value(0),
00216 param_nr(nr),
00217 first_bit(0),
00218 num_bit(32)
00219 {}
00220
00226 GRFParameterInfo::GRFParameterInfo(GRFParameterInfo &info) :
00227 name(DuplicateGRFText(info.name)),
00228 desc(DuplicateGRFText(info.desc)),
00229 type(info.type),
00230 min_value(info.min_value),
00231 max_value(info.max_value),
00232 def_value(info.def_value),
00233 param_nr(info.param_nr),
00234 first_bit(info.first_bit),
00235 num_bit(info.num_bit)
00236 {
00237 for (uint i = 0; i < info.value_names.Length(); i++) {
00238 SmallPair<uint32, GRFText *> *data = info.value_names.Get(i);
00239 this->value_names.Insert(data->first, DuplicateGRFText(data->second));
00240 }
00241 }
00242
00244 GRFParameterInfo::~GRFParameterInfo()
00245 {
00246 CleanUpGRFText(this->name);
00247 CleanUpGRFText(this->desc);
00248 for (uint i = 0; i < this->value_names.Length(); i++) {
00249 SmallPair<uint32, GRFText *> *data = this->value_names.Get(i);
00250 CleanUpGRFText(data->second);
00251 }
00252 }
00253
00259 uint32 GRFParameterInfo::GetValue(struct GRFConfig *config) const
00260 {
00261
00262 if (this->num_bit == 32) return config->param[this->param_nr];
00263 return GB(config->param[this->param_nr], this->first_bit, this->num_bit);
00264 }
00265
00271 void GRFParameterInfo::SetValue(struct GRFConfig *config, uint32 value)
00272 {
00273
00274 if (this->num_bit == 32) {
00275 config->param[this->param_nr] = value;
00276 } else {
00277 SB(config->param[this->param_nr], this->first_bit, this->num_bit, value);
00278 }
00279 config->num_params = max<uint>(config->num_params, this->param_nr + 1);
00280 SetWindowDirty(WC_GAME_OPTIONS, WN_GAME_OPTIONS_NEWGRF_STATE);
00281 }
00282
00289 bool UpdateNewGRFConfigPalette(int32 p1)
00290 {
00291 for (GRFConfig *c = _grfconfig_newgame; c != NULL; c = c->next) c->SetSuitablePalette();
00292 for (GRFConfig *c = _grfconfig_static; c != NULL; c = c->next) c->SetSuitablePalette();
00293 for (GRFConfig *c = _all_grfs; c != NULL; c = c->next) c->SetSuitablePalette();
00294 return true;
00295 }
00296
00303 static bool CalcGRFMD5Sum(GRFConfig *config, Subdirectory subdir)
00304 {
00305 FILE *f;
00306 Md5 checksum;
00307 uint8 buffer[1024];
00308 size_t len, size;
00309
00310
00311 f = FioFOpenFile(config->filename, "rb", subdir, &size);
00312 if (f == NULL) return false;
00313
00314
00315 while ((len = fread(buffer, 1, (size > sizeof(buffer)) ? sizeof(buffer) : size, f)) != 0 && size != 0) {
00316 size -= len;
00317 checksum.Append(buffer, len);
00318 }
00319 checksum.Finish(config->ident.md5sum);
00320
00321 FioFCloseFile(f);
00322
00323 return true;
00324 }
00325
00326
00334 bool FillGRFDetails(GRFConfig *config, bool is_static, Subdirectory subdir)
00335 {
00336 if (!FioCheckFileExists(config->filename, subdir)) {
00337 config->status = GCS_NOT_FOUND;
00338 return false;
00339 }
00340
00341
00342 LoadNewGRFFile(config, CONFIG_SLOT, GLS_FILESCAN, subdir);
00343 config->SetSuitablePalette();
00344
00345
00346 if (config->ident.grfid == 0 || config->ident.grfid == 0xFFFFFFFF || config->IsOpenTTDBaseGRF()) return false;
00347
00348 if (is_static) {
00349
00350 LoadNewGRFFile(config, 62, GLS_SAFETYSCAN, subdir);
00351
00352
00353 if (HasBit(config->flags, GCF_UNSAFE)) return false;
00354 }
00355
00356 return CalcGRFMD5Sum(config, subdir);
00357 }
00358
00359
00365 void ClearGRFConfigList(GRFConfig **config)
00366 {
00367 GRFConfig *c, *next;
00368 for (c = *config; c != NULL; c = next) {
00369 next = c->next;
00370 delete c;
00371 }
00372 *config = NULL;
00373 }
00374
00375
00383 GRFConfig **CopyGRFConfigList(GRFConfig **dst, const GRFConfig *src, bool init_only)
00384 {
00385
00386 ClearGRFConfigList(dst);
00387 for (; src != NULL; src = src->next) {
00388 GRFConfig *c = new GRFConfig(*src);
00389
00390 ClrBit(c->flags, GCF_INIT_ONLY);
00391 if (init_only) SetBit(c->flags, GCF_INIT_ONLY);
00392
00393 *dst = c;
00394 dst = &c->next;
00395 }
00396
00397 return dst;
00398 }
00399
00413 static void RemoveDuplicatesFromGRFConfigList(GRFConfig *list)
00414 {
00415 GRFConfig *prev;
00416 GRFConfig *cur;
00417
00418 if (list == NULL) return;
00419
00420 for (prev = list, cur = list->next; cur != NULL; prev = cur, cur = cur->next) {
00421 if (cur->ident.grfid != list->ident.grfid) continue;
00422
00423 prev->next = cur->next;
00424 delete cur;
00425 cur = prev;
00426 }
00427
00428 RemoveDuplicatesFromGRFConfigList(list->next);
00429 }
00430
00435 void AppendStaticGRFConfigs(GRFConfig **dst)
00436 {
00437 GRFConfig **tail = dst;
00438 while (*tail != NULL) tail = &(*tail)->next;
00439
00440 CopyGRFConfigList(tail, _grfconfig_static, false);
00441 RemoveDuplicatesFromGRFConfigList(*dst);
00442 }
00443
00449 void AppendToGRFConfigList(GRFConfig **dst, GRFConfig *el)
00450 {
00451 GRFConfig **tail = dst;
00452 while (*tail != NULL) tail = &(*tail)->next;
00453 *tail = el;
00454
00455 RemoveDuplicatesFromGRFConfigList(*dst);
00456 }
00457
00458
00460 void ResetGRFConfig(bool defaults)
00461 {
00462 CopyGRFConfigList(&_grfconfig, _grfconfig_newgame, !defaults);
00463 AppendStaticGRFConfigs(&_grfconfig);
00464 }
00465
00466
00478 GRFListCompatibility IsGoodGRFConfigList(GRFConfig *grfconfig)
00479 {
00480 GRFListCompatibility res = GLC_ALL_GOOD;
00481
00482 for (GRFConfig *c = grfconfig; c != NULL; c = c->next) {
00483 const GRFConfig *f = FindGRFConfig(c->ident.grfid, FGCM_EXACT, c->ident.md5sum);
00484 if (f == NULL || HasBit(f->flags, GCF_INVALID)) {
00485 char buf[256];
00486
00487
00488
00489 f = FindGRFConfig(c->ident.grfid, FGCM_COMPATIBLE, NULL, c->version);
00490 if (f != NULL) {
00491 md5sumToString(buf, lastof(buf), c->ident.md5sum);
00492 DEBUG(grf, 1, "NewGRF %08X (%s) not found; checksum %s. Compatibility mode on", BSWAP32(c->ident.grfid), c->filename, buf);
00493 if (!HasBit(c->flags, GCF_COMPATIBLE)) {
00494
00495 SetBit(c->flags, GCF_COMPATIBLE);
00496 memcpy(c->original_md5sum, c->ident.md5sum, sizeof(c->original_md5sum));
00497 }
00498
00499
00500 if (res != GLC_NOT_FOUND) res = GLC_COMPATIBLE;
00501 goto compatible_grf;
00502 }
00503
00504
00505 md5sumToString(buf, lastof(buf), c->ident.md5sum);
00506 DEBUG(grf, 0, "NewGRF %08X (%s) not found; checksum %s", BSWAP32(c->ident.grfid), c->filename, buf);
00507
00508 c->status = GCS_NOT_FOUND;
00509 res = GLC_NOT_FOUND;
00510 } else {
00511 compatible_grf:
00512 DEBUG(grf, 1, "Loading GRF %08X from %s", BSWAP32(f->ident.grfid), f->filename);
00513
00514
00515
00516
00517
00518 if (!HasBit(c->flags, GCF_COPY)) {
00519 free(c->filename);
00520 c->filename = strdup(f->filename);
00521 memcpy(c->ident.md5sum, f->ident.md5sum, sizeof(c->ident.md5sum));
00522 c->name->Release();
00523 c->name = f->name;
00524 c->name->AddRef();
00525 c->info->Release();
00526 c->info = f->name;
00527 c->info->AddRef();
00528 c->error = NULL;
00529 c->version = f->version;
00530 c->min_loadable_version = f->min_loadable_version;
00531 c->num_valid_params = f->num_valid_params;
00532 c->has_param_defaults = f->has_param_defaults;
00533 for (uint i = 0; i < f->param_info.Length(); i++) {
00534 if (f->param_info[i] == NULL) {
00535 *c->param_info.Append() = NULL;
00536 } else {
00537 *c->param_info.Append() = new GRFParameterInfo(*f->param_info[i]);
00538 }
00539 }
00540 }
00541 }
00542 }
00543
00544 return res;
00545 }
00546
00548 class GRFFileScanner : FileScanner {
00549 uint next_update;
00550 uint num_scanned;
00551
00552 public:
00553 GRFFileScanner() : next_update(_realtime_tick), num_scanned(0)
00554 {
00555 }
00556
00557 bool AddFile(const char *filename, size_t basepath_length, const char *tar_filename);
00558
00560 static uint DoScan()
00561 {
00562 GRFFileScanner fs;
00563 int ret = fs.Scan(".grf", NEWGRF_DIR);
00564
00565
00566 _settings_client.gui.last_newgrf_count = fs.num_scanned;
00567 return ret;
00568 }
00569 };
00570
00571 bool GRFFileScanner::AddFile(const char *filename, size_t basepath_length, const char *tar_filename)
00572 {
00573 GRFConfig *c = new GRFConfig(filename + basepath_length);
00574
00575 bool added = true;
00576 if (FillGRFDetails(c, false)) {
00577 if (_all_grfs == NULL) {
00578 _all_grfs = c;
00579 } else {
00580
00581
00582 GRFConfig **pd, *d;
00583 bool stop = false;
00584 for (pd = &_all_grfs; (d = *pd) != NULL; pd = &d->next) {
00585 if (c->ident.grfid == d->ident.grfid && memcmp(c->ident.md5sum, d->ident.md5sum, sizeof(c->ident.md5sum)) == 0) added = false;
00586
00587
00588
00589 if (strcasecmp(c->GetName(), d->GetName()) <= 0) {
00590 stop = true;
00591 } else if (stop) {
00592 break;
00593 }
00594 }
00595 if (added) {
00596 c->next = d;
00597 *pd = c;
00598 }
00599 }
00600 } else {
00601 added = false;
00602 }
00603
00604 this->num_scanned++;
00605 if (this->next_update <= _realtime_tick) {
00606 _modal_progress_work_mutex->EndCritical();
00607 _modal_progress_paint_mutex->BeginCritical();
00608
00609 const char *name = NULL;
00610 if (c->name != NULL) name = GetGRFStringFromGRFText(c->name->text);
00611 if (name == NULL) name = c->filename;
00612 UpdateNewGRFScanStatus(this->num_scanned, name);
00613
00614 _modal_progress_work_mutex->BeginCritical();
00615 _modal_progress_paint_mutex->EndCritical();
00616
00617 this->next_update = _realtime_tick + 200;
00618 }
00619
00620 if (!added) {
00621
00622
00623 delete c;
00624 }
00625
00626 return added;
00627 }
00628
00635 static int CDECL GRFSorter(GRFConfig * const *p1, GRFConfig * const *p2)
00636 {
00637 const GRFConfig *c1 = *p1;
00638 const GRFConfig *c2 = *p2;
00639
00640 return strcasecmp(c1->GetName(), c2->GetName());
00641 }
00642
00647 void DoScanNewGRFFiles(void *callback)
00648 {
00649 _modal_progress_work_mutex->BeginCritical();
00650
00651 ClearGRFConfigList(&_all_grfs);
00652 TarScanner::DoScan(TarScanner::NEWGRF);
00653
00654 DEBUG(grf, 1, "Scanning for NewGRFs");
00655 uint num = GRFFileScanner::DoScan();
00656
00657 DEBUG(grf, 1, "Scan complete, found %d files", num);
00658 if (num != 0 && _all_grfs != NULL) {
00659
00660
00661
00662 GRFConfig **to_sort = MallocT<GRFConfig*>(num);
00663
00664 uint i = 0;
00665 for (GRFConfig *p = _all_grfs; p != NULL; p = p->next, i++) {
00666 to_sort[i] = p;
00667 }
00668
00669 num = i;
00670
00671 QSortT(to_sort, num, &GRFSorter);
00672
00673 for (i = 1; i < num; i++) {
00674 to_sort[i - 1]->next = to_sort[i];
00675 }
00676 to_sort[num - 1]->next = NULL;
00677 _all_grfs = to_sort[0];
00678
00679 free(to_sort);
00680
00681 #ifdef ENABLE_NETWORK
00682 NetworkAfterNewGRFScan();
00683 #endif
00684 }
00685
00686 _modal_progress_work_mutex->EndCritical();
00687 _modal_progress_paint_mutex->BeginCritical();
00688
00689
00690 InvalidateWindowClassesData(WC_SAVELOAD, 0, true);
00691 InvalidateWindowData(WC_GAME_OPTIONS, WN_GAME_OPTIONS_NEWGRF_STATE, GOID_NEWGRF_RESCANNED, true);
00692 if (callback != NULL) ((NewGRFScanCallback*)callback)->OnNewGRFsScanned();
00693
00694 DeleteWindowByClass(WC_MODAL_PROGRESS);
00695 SetModalProgress(false);
00696 MarkWholeScreenDirty();
00697 _modal_progress_paint_mutex->EndCritical();
00698 }
00699
00704 void ScanNewGRFFiles(NewGRFScanCallback *callback)
00705 {
00706
00707 SetModalProgress(true);
00708
00709 MarkWholeScreenDirty();
00710
00711 if (!_video_driver->HasGUI() || !ThreadObject::New(&DoScanNewGRFFiles, callback, NULL)) {
00712 _modal_progress_work_mutex->EndCritical();
00713 _modal_progress_paint_mutex->EndCritical();
00714 DoScanNewGRFFiles(callback);
00715 _modal_progress_paint_mutex->BeginCritical();
00716 _modal_progress_work_mutex->BeginCritical();
00717 } else {
00718 UpdateNewGRFScanStatus(0, NULL);
00719 }
00720 }
00721
00730 const GRFConfig *FindGRFConfig(uint32 grfid, FindGRFConfigMode mode, const uint8 *md5sum, uint32 desired_version)
00731 {
00732 assert((mode == FGCM_EXACT) != (md5sum == NULL));
00733 const GRFConfig *best = NULL;
00734 for (const GRFConfig *c = _all_grfs; c != NULL; c = c->next) {
00735
00736 if (!c->ident.HasGrfIdentifier(grfid, md5sum)) continue;
00737
00738 if (md5sum != NULL || mode == FGCM_ANY) return c;
00739
00740 if (mode != FGCM_NEWEST && HasBit(c->flags, GCF_INVALID)) continue;
00741
00742 if (mode == FGCM_COMPATIBLE && (c->version < desired_version || c->min_loadable_version > desired_version)) continue;
00743
00744 if (best == NULL || c->version > best->version) best = c;
00745 }
00746
00747 return best;
00748 }
00749
00750 #ifdef ENABLE_NETWORK
00751
00753 struct UnknownGRF : public GRFIdentifier {
00754 UnknownGRF *next;
00755 GRFTextWrapper *name;
00756 };
00757
00775 GRFTextWrapper *FindUnknownGRFName(uint32 grfid, uint8 *md5sum, bool create)
00776 {
00777 UnknownGRF *grf;
00778 static UnknownGRF *unknown_grfs = NULL;
00779
00780 for (grf = unknown_grfs; grf != NULL; grf = grf->next) {
00781 if (grf->grfid == grfid) {
00782 if (memcmp(md5sum, grf->md5sum, sizeof(grf->md5sum)) == 0) return grf->name;
00783 }
00784 }
00785
00786 if (!create) return NULL;
00787
00788 grf = CallocT<UnknownGRF>(1);
00789 grf->grfid = grfid;
00790 grf->next = unknown_grfs;
00791 grf->name = new GRFTextWrapper();
00792 grf->name->AddRef();
00793
00794 AddGRFTextToList(&grf->name->text, UNKNOWN_GRF_NAME_PLACEHOLDER);
00795 memcpy(grf->md5sum, md5sum, sizeof(grf->md5sum));
00796
00797 unknown_grfs = grf;
00798 return grf->name;
00799 }
00800
00801 #endif
00802
00803
00810 GRFConfig *GetGRFConfig(uint32 grfid, uint32 mask)
00811 {
00812 GRFConfig *c;
00813
00814 for (c = _grfconfig; c != NULL; c = c->next) {
00815 if ((c->ident.grfid & mask) == (grfid & mask)) return c;
00816 }
00817
00818 return NULL;
00819 }
00820
00821
00823 char *GRFBuildParamList(char *dst, const GRFConfig *c, const char *last)
00824 {
00825 uint i;
00826
00827
00828 if (c->num_params == 0) return strecpy(dst, "", last);
00829
00830 for (i = 0; i < c->num_params; i++) {
00831 if (i > 0) dst = strecpy(dst, " ", last);
00832 dst += seprintf(dst, last, "%d", c->param[i]);
00833 }
00834 return dst;
00835 }
00836
00838 static const uint32 OPENTTD_GRAPHICS_BASE_GRF_ID = BSWAP32(0xFF4F5400);
00839
00844 bool GRFConfig::IsOpenTTDBaseGRF() const
00845 {
00846 return (this->ident.grfid & 0x00FFFFFF) == OPENTTD_GRAPHICS_BASE_GRF_ID;
00847 }
00848
00854 const char *GRFConfig::GetTextfile(TextfileType type) const
00855 {
00856 static const char * const prefixes[] = {
00857 "readme",
00858 "changelog",
00859 "license",
00860 };
00861 assert_compile(lengthof(prefixes) == TFT_END);
00862
00863 const char *prefix = prefixes[type];
00864
00865 if (this->filename == NULL) return NULL;
00866
00867 static char file_path[MAX_PATH];
00868 strecpy(file_path, this->filename, lastof(file_path));
00869
00870 char *slash = strrchr(file_path, PATHSEPCHAR);
00871 if (slash == NULL) return NULL;
00872
00873 seprintf(slash + 1, lastof(file_path), "%s_%s.txt", prefix, GetCurrentLanguageIsoCode());
00874 if (FioCheckFileExists(file_path, NEWGRF_DIR)) return file_path;
00875
00876 seprintf(slash + 1, lastof(file_path), "%s_%.2s.txt", prefix, GetCurrentLanguageIsoCode());
00877 if (FioCheckFileExists(file_path, NEWGRF_DIR)) return file_path;
00878
00879 seprintf(slash + 1, lastof(file_path), "%s.txt", prefix);
00880 return FioCheckFileExists(file_path, NEWGRF_DIR) ? file_path : NULL;
00881 }