IStreamPtr BsaArchive::open(const Entry &entry)
{
std::unique_ptr<std::istream> stream(new std::ifstream(mFilename.c_str(), std::ios::binary));
if(!stream->seekg(entry.mStart))
return IStreamPtr(nullptr);
return IStreamPtr(new ConstrainedFileStream(std::move(stream), entry.mStart, entry.mEnd));
}
IStreamPtr BsaArchive::open(const char *name)
{
auto iter = std::lower_bound(mLookupName.begin(), mLookupName.end(), name);
if(iter == mLookupName.end() || *iter != name)
return IStreamPtr(nullptr);
return open(mEntries[std::distance(mLookupName.begin(), iter)]);
}
///returnes empty pointer, but saves id for future usage
virtual IStreamPtr createStream(const std::string& whereFrom){
if(mRequests.size() < mMaxRequests)
mRequests.push_back(whereFrom);
return IStreamPtr();
}
IStreamPtr openConstrainedFileStream(const char *filename,
size_t start, size_t length)
{
return IStreamPtr(new ConstrainedFileStream(filename, start, length));
}
IStreamPtr openConstrainedFileStream(const char *filename,
size_t start, size_t length)
{
auto buf = std::unique_ptr<std::streambuf>(new ConstrainedFileStreamBuf(filename, start, length));
return IStreamPtr(new ConstrainedFileStream(std::move(buf)));
}