diff options
Diffstat (limited to 'engines/tinsel/detection.cpp')
| -rw-r--r-- | engines/tinsel/detection.cpp | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/engines/tinsel/detection.cpp b/engines/tinsel/detection.cpp index 4028ea2245..e02eec44a3 100644 --- a/engines/tinsel/detection.cpp +++ b/engines/tinsel/detection.cpp @@ -27,6 +27,7 @@ #include "engines/advancedDetector.h" #include "common/file.h" +#include "common/md5.h" #include "common/savefile.h" #include "tinsel/cursor.h" @@ -475,6 +476,7 @@ public: } virtual bool createInstance(OSystem *syst, Engine **engine, const ADGameDescription *desc) const; + const ADGameDescription *fallbackDetect(const Common::FSList &fslist) const; virtual bool hasFeature(MetaEngineFeature f) const; virtual SaveStateList listSaves(const char *target) const; @@ -542,6 +544,162 @@ bool TinselMetaEngine::createInstance(OSystem *syst, Engine **engine, const ADGa return gd != 0; } +struct SizeMD5 { + int size; + char md5[32+1]; +}; +typedef Common::HashMap<Common::String, SizeMD5, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> SizeMD5Map; +typedef Common::HashMap<Common::String, Common::FSNode, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> FileMap; +typedef Common::Array<const ADGameDescription*> ADGameDescList; + +/** + * Fallback detection scans the list of Discworld 2 targets to see if it can detect an installation + * where the files haven't been renamed (i.e. don't have the '1' just before the extension) + */ +const ADGameDescription *TinselMetaEngine::fallbackDetect(const Common::FSList &fslist) const { + Common::String extra; + FileMap allFiles; + SizeMD5Map filesSizeMD5; + + const ADGameFileDescription *fileDesc; + const Tinsel::TinselGameDescription *g; + + if (fslist.empty()) + return NULL; + + // First we compose a hashmap of all files in fslist. + // Includes nifty stuff like removing trailing dots and ignoring case. + for (Common::FSList::const_iterator file = fslist.begin(); file != fslist.end(); ++file) { + if (file->isDirectory()) { + if (!scumm_stricmp(file->getName().c_str(), "dw2")) { + // Probably Discworld 2 subfolder on CD, so add it's contents as well + Common::FSList files; + if (file->getChildren(files, Common::FSNode::kListAll)) { + Common::FSList::const_iterator file2; + for (file2 = files.begin(); file2 != files.end(); ++file2) { + if (file2->isDirectory()) + continue; + + Common::String fname = file2->getName(); + allFiles[fname] = *file2; + } + } + } + continue; + } + + Common::String tstr = file->getName(); + + allFiles[tstr] = *file; // Record the presence of this file + } + + // Check which files are included in some dw2 ADGameDescription *and* present + // in fslist without a '1' suffix character. Compute MD5s and file sizes for these files. + for (g = &Tinsel::gameDescriptions[0]; g->desc.gameid != 0; ++g) { + if (strcmp(g->desc.gameid, "dw2") != 0) + continue; + + for (fileDesc = g->desc.filesDescriptions; fileDesc->fileName; fileDesc++) { + // Get the next filename, stripping off any '1' suffix character + char tempFilename[50]; + strcpy(tempFilename, fileDesc->fileName); + char *pOne = strchr(tempFilename, '1'); + if (pOne) strcpy(pOne, pOne + 1); + + Common::String fname(tempFilename); + if (allFiles.contains(fname) && !filesSizeMD5.contains(fname)) { + SizeMD5 tmp; + if (!md5_file_string(allFiles[fname], tmp.md5, detectionParams.md5Bytes)) + tmp.md5[0] = 0; + + Common::File testFile; + if (testFile.open(allFiles[fname])) + tmp.size = (int32)testFile.size(); + else + tmp.size = -1; + + filesSizeMD5[fname] = tmp; + } + } + } + + ADGameDescList matched; + int maxFilesMatched = 0; + bool gotAnyMatchesWithAllFiles = false; + + // MD5 based matching + uint i; + for (i = 0, g = &Tinsel::gameDescriptions[0]; g->desc.gameid != 0; ++g) { + if (strcmp(g->desc.gameid, "dw2") != 0) + continue; + + bool fileMissing = false; + + if ((detectionParams.flags & kADFlagUseExtraAsHint) && !extra.empty() && g->desc.extra != extra) + continue; + + bool allFilesPresent = true; + + // Try to match all files for this game + for (fileDesc = g->desc.filesDescriptions; fileDesc->fileName; fileDesc++) { + // Get the next filename, stripping off any '1' suffix character + char tempFilename[50]; + strcpy(tempFilename, fileDesc->fileName); + char *pOne = strchr(tempFilename, '1'); + if (pOne) strcpy(pOne, pOne + 1); + + Common::String tstr(tempFilename); + + if (!filesSizeMD5.contains(tstr)) { + fileMissing = true; + allFilesPresent = false; + break; + } + + if (fileDesc->md5 != NULL && 0 != strcmp(fileDesc->md5, filesSizeMD5[tstr].md5)) { + fileMissing = true; + break; + } + + if (fileDesc->fileSize != -1 && fileDesc->fileSize != filesSizeMD5[tstr].size) { + fileMissing = true; + break; + } + } + + if (allFilesPresent) + gotAnyMatchesWithAllFiles = true; + + if (!fileMissing) { + // Count the number of matching files. Then, only keep those + // entries which match a maximal amount of files. + int curFilesMatched = 0; + for (fileDesc = g->desc.filesDescriptions; fileDesc->fileName; fileDesc++) + curFilesMatched++; + + if (curFilesMatched > maxFilesMatched) { + maxFilesMatched = curFilesMatched; + + for (uint j = 0; j < matched.size();) { + if (matched[j]->flags & ADGF_KEEPMATCH) + ++j; + else + matched.remove_at(j); + } + matched.push_back((const ADGameDescription *)g); + } else if (curFilesMatched == maxFilesMatched) { + matched.push_back((const ADGameDescription *)g); + } + } + } + + // We didn't find a match + if (matched.empty()) + return NULL; + + return *matched.begin(); +} + int TinselMetaEngine::getMaximumSaveSlot() const { return 99; } void TinselMetaEngine::removeSaveState(const char *target, int slot) const { |