/**
* 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;
// TODO: The following code is essentially a slightly modified copy of the
// complete code of function detectGame() in engines/advancedDetector.cpp.
// That quite some hefty and undesirable code duplication. Its only purpose
// seems to be to treat filenames of the form "foo1.ext" as "foo.ext".
// It would be nice to avoid this code duplication.
// First we compose a hashmap of all files in fslist.
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) {
do {
*pOne = *(pOne + 1);
pOne++;
} while (*pOne);
}
Common::String fname(tempFilename);
if (allFiles.contains(fname) && !filesSizeMD5.contains(fname)) {
SizeMD5 tmp;
Common::File testFile;
if (testFile.open(allFiles[fname])) {
tmp.size = (int32)testFile.size();
tmp.md5 = computeStreamMD5AsString(testFile, detectionParams.md5Bytes);
} else {
tmp.size = -1;
}
filesSizeMD5[fname] = tmp;
}
}
}
ADGameDescList matched;
int maxFilesMatched = 0;
// MD5 based matching
for (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) {
do {
*pOne = *(pOne + 1);
pOne++;
} while (*pOne);
}
Common::String tstr(tempFilename);
if (!filesSizeMD5.contains(tstr)) {
fileMissing = true;
allFilesPresent = false;
break;
}
if (fileDesc->md5 != NULL && fileDesc->md5 != filesSizeMD5[tstr].md5) {
fileMissing = true;
break;
}
if (fileDesc->fileSize != -1 && fileDesc->fileSize != filesSizeMD5[tstr].size) {
fileMissing = true;
break;
}
}
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;
matched.clear(); // Remove any prior, lower ranked matches.
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();
}
static void detectGames(const Common::FSList &fslist, Common::List<DetectorResult> &results, const char *gameid) {
DescMap fileMD5Map;
DetectorResult dr;
// Dive one level down since mac indy3/loom has its files split into directories. See Bug #1438631
composeFileHashMap(fslist, fileMD5Map, 2, directoryGlobs);
// Iterate over all filename patterns.
for (const GameFilenamePattern *gfp = gameFilenamesTable; gfp->gameid; ++gfp) {
// If a gameid was specified, we only try to detect that specific game,
// so we can just skip over everything with a differing gameid.
if (gameid && scumm_stricmp(gameid, gfp->gameid))
continue;
// Generate the detectname corresponding to the gfp. If the file doesn't
// exist in the directory we are looking at, we can skip to the next
// one immediately.
Common::String file(generateFilenameForDetection(gfp->pattern, gfp->genMethod));
if (!fileMD5Map.contains(file))
continue;
// Reset the DetectorResult variable
dr.fp.pattern = gfp->pattern;
dr.fp.genMethod = gfp->genMethod;
dr.game.gameid = 0;
dr.language = gfp->language;
dr.md5.clear();
dr.extra = 0;
// ____ _ _
// | _ \ __ _ _ __| |_ / |
// | |_) / _` | '__| __| | |
// | __/ (_| | | | |_ | |
// |_| \__,_|_| \__| |_|
//
// PART 1: Trying to find an exact match using MD5.
//
//
// Background: We found a valid detection file. Check if its MD5
// checksum occurs in our MD5 table. If it does, try to use that
// to find an exact match.
//
// We only do that if the MD5 hadn't already been computed (since
// we may look at some detection files multiple times).
//
DetectorDesc &d = fileMD5Map[file];
if (d.md5.empty()) {
Common::SeekableReadStream *tmp = 0;
bool isDiskImg = (file.hasSuffix(".d64") || file.hasSuffix(".dsk") || file.hasSuffix(".prg"));
if (isDiskImg) {
tmp = openDiskImage(d.node, gfp);
debug(2, "Falling back to disk-based detection");
} else {
tmp = d.node.createReadStream();
}
Common::String md5str;
if (tmp)
md5str = computeStreamMD5AsString(*tmp, kMD5FileSizeLimit);
if (!md5str.empty()) {
d.md5 = md5str;
d.md5Entry = findInMD5Table(md5str.c_str());
dr.md5 = d.md5;
if (d.md5Entry) {
// Exact match found. Compute the precise game settings.
computeGameSettingsFromMD5(fslist, gfp, d.md5Entry, dr);
// Print some debug info
int filesize = tmp->size();
if (d.md5Entry->filesize != filesize)
debug(1, "SCUMM detector found matching file '%s' with MD5 %s, size %d\n",
file.c_str(), md5str.c_str(), filesize);
// Sanity check: We *should* have found a matching gameid / variant at this point.
// If not, then there's a bug in our data tables...
assert(dr.game.gameid != 0);
// Add it to the list of detected games
results.push_back(dr);
}
}
if (isDiskImg)
closeDiskImage((ScummDiskImage*)tmp);
delete tmp;
}
// If an exact match for this file has already been found, don't bother
// looking at it anymore.
if (d.md5Entry)
continue;
// ____ _ ____
// | _ \ __ _ _ __| |_ |___ \ *
// | |_) / _` | '__| __| __) |
// | __/ (_| | | | |_ / __/
// |_| \__,_|_| \__| |_____|
//
// PART 2: Fuzzy matching for files with unknown MD5.
//
// We loop over the game variants matching the gameid associated to
// the gfp record. We then try to decide for each whether it could be
// appropriate or not.
dr.md5 = d.md5;
for (const GameSettings *g = gameVariantsTable; g->gameid; ++g) {
// Skip over entries with a different gameid.
if (g->gameid[0] == 0 || scumm_stricmp(gfp->gameid, g->gameid))
continue;
dr.game = *g;
dr.extra = g->variant; // FIXME: We (ab)use 'variant' for the 'extra' description for now.
if (gfp->platform != Common::kPlatformUnknown)
dr.game.platform = gfp->platform;
// If a variant has been specified, use that!
if (gfp->variant) {
if (!scumm_stricmp(gfp->variant, g->variant)) {
// perfect match found
results.push_back(dr);
break;
}
continue;
}
// HACK: Perhaps it is some modified translation?
dr.language = detectLanguage(fslist, g->id);
// Add the game/variant to the candidates list if it is consistent
// with the file(s) we are seeing.
if (testGame(g, fileMD5Map, file))
results.push_back(dr);
}
}
}
