IArchive* CArchiveLoader::OpenArchive(const std::string& fileName, const std::string& type) const
{
IArchive* ret = NULL;
const std::string ext = type.empty() ? FileSystem::GetExtension(fileName) : type;
const std::string filePath = dataDirsAccess.LocateFile(fileName);
const std::map<std::string, IArchiveFactory*>::const_iterator afi
= archiveFactories.find(ext);
if (afi != archiveFactories.end()) {
ret = afi->second->CreateArchive(filePath);
}
if (ret && ret->IsOpen()) {
return ret;
}
delete ret;
return NULL;
}
void CArchiveScanner::ScanArchive(const std::string& fullName, bool doChecksum)
{
struct stat info;
stat(fullName.c_str(), &info);
const std::string fn = filesystem.GetFilename(fullName);
const std::string fpath = filesystem.GetDirectory(fullName);
const std::string lcfn = StringToLower(fn);
//! Determine whether this archive has earlier be found to be broken
std::map<std::string, BrokenArchive>::iterator bai = brokenArchives.find(lcfn);
if (bai != brokenArchives.end()) {
if ((unsigned)info.st_mtime == bai->second.modified && fpath == bai->second.path) {
bai->second.updated = true;
return;
}
}
//! Determine whether to rely on the cached info or not
bool cached = false;
std::map<std::string, ArchiveInfo>::iterator aii = archiveInfo.find(lcfn);
if (aii != archiveInfo.end()) {
//! This archive may have been obsoleted, do not process it if so
if (aii->second.replaced.length() > 0) {
return;
}
if ((unsigned)info.st_mtime == aii->second.modified && fpath == aii->second.path) {
cached = true;
aii->second.updated = true;
}
//! If we are here, we could have invalid info in the cache
//! Force a reread if it's a directory archive, as st_mtime only
//! reflects changes to the directory itself, not the contents.
if (!cached) {
archiveInfo.erase(aii);
}
}
//! Time to parse the info we are interested in
if (cached) {
//! If cached is true, aii will point to the archive
if (doChecksum && (aii->second.checksum == 0))
aii->second.checksum = GetCRC(fullName);
} else {
IArchive* ar = archiveLoader.OpenArchive(fullName);
if (!ar || !ar->IsOpen()) {
logOutput.Print("Unable to open archive: %s", fullName.c_str());
return;
}
ArchiveInfo ai;
std::string error = "";
std::string mapfile;
bool hasModinfo = ar->FileExists("modinfo.lua");
bool hasMapinfo = ar->FileExists("mapinfo.lua");
//! check for smf/sm3 and if the uncompression of important files is too costy
for (unsigned fid = 0; fid != ar->NumFiles(); ++fid)
{
std::string name;
int size;
ar->FileInfo(fid, name, size);
const std::string lowerName = StringToLower(name);
const std::string ext = filesystem.GetExtension(lowerName);
if ((ext == "smf") || (ext == "sm3")) {
mapfile = name;
}
const unsigned char metaFileClass = GetMetaFileClass(lowerName);
if ((metaFileClass != 0) && !(ar->HasLowReadingCost(fid))) {
//! is a meta-file and not cheap to read
if (metaFileClass == 1) {
//! 1st class
error = "Unpacking/reading cost for meta file " + name
+ " is too high, please repack the archive (make sure to use a non-solid algorithm, if applicable)";
break;
} else if (metaFileClass == 2) {
//! 2nd class
logOutput.Print(LOG_ARCHIVESCANNER,
"Warning: Archive %s: The cost for reading a 2nd class meta-file is too high: %s",
fullName.c_str(), name.c_str());
}
}
}
if (!error.empty()) {
//! we already have an error, no further evaluation required
} if (hasMapinfo || !mapfile.empty()) {
//! it is a map
if (hasMapinfo) {
ScanArchiveLua(ar, "mapinfo.lua", ai, error);
} else if (hasModinfo) {
//! backwards-compat for modinfo.lua in maps
ScanArchiveLua(ar, "modinfo.lua", ai, error);
}
if (ai.archiveData.GetName().empty()) {
//! FIXME The name will never be empty, if version is set (see HACK in ArchiveData)
ai.archiveData.SetInfoItemValueString("name", filesystem.GetBasename(mapfile));
}
if (ai.archiveData.GetMapFile().empty()) {
ai.archiveData.SetInfoItemValueString("mapfile", mapfile);
}
AddDependency(ai.archiveData.GetDependencies(), "Map Helper v1");
ai.archiveData.SetInfoItemValueInteger("modType", modtype::map);
logOutput.Print(LOG_ARCHIVESCANNER, "Found new map: %s",
ai.archiveData.GetName().c_str());
} else if (hasModinfo) {
//! it is a mod
ScanArchiveLua(ar, "modinfo.lua", ai, error);
if (ai.archiveData.GetModType() == modtype::primary) {
AddDependency(ai.archiveData.GetDependencies(), "Spring content v1");
}
logOutput.Print(LOG_ARCHIVESCANNER, "Found new game: %s",
ai.archiveData.GetName().c_str());
} else {
//! neither a map nor a mod: error
error = "missing modinfo.lua/mapinfo.lua";
}
delete ar;
if (!error.empty()) {
//! for some reason, the archive is marked as broken
logOutput.Print("Failed to scan %s (%s)",
fullName.c_str(), error.c_str());
//! record it as broken, so we don't need to look inside everytime
BrokenArchive ba;
ba.path = fpath;
ba.modified = info.st_mtime;
ba.updated = true;
ba.problem = error;
brokenArchives[lcfn] = ba;
return;
}
ai.path = fpath;
ai.modified = info.st_mtime;
ai.origName = fn;
ai.updated = true;
//! Optionally calculate a checksum for the file
//! To prevent reading all files in all directory (.sdd) archives
//! every time this function is called, directory archive checksums
//! are calculated on the fly.
if (doChecksum) {
ai.checksum = GetCRC(fullName);
} else {
ai.checksum = 0;
}
archiveInfo[lcfn] = ai;
}
}