/**
* 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();
}
