| 633 | using namespace ROOTDataHelpers; |
| 634 | |
| 635 | ROOTData::ROOTData(const std::string& filename) |
| 636 | : filename(filename) { |
| 637 | DEBUG(Q_FUNC_INFO << ", filename = " << filename) |
| 638 | // The file structure is described in root/io/io/src/TFile.cxx |
| 639 | std::ifstream is(filename, std::ifstream::binary); |
| 640 | std::string root(4, 0); |
| 641 | is.read(const_cast<char*>(root.data()), 4); |
| 642 | if (root != "root") |
| 643 | return; |
| 644 | |
| 645 | int fileVersion = read<int>(is); |
| 646 | long int pos = read<int>(is); |
| 647 | histdirs.emplace(pos, Directory{}); |
| 648 | treedirs.emplace(pos, Directory{}); |
| 649 | long int endpos = fileVersion < 1000000 ? read<int>(is) : read<long int>(is); |
| 650 | |
| 651 | is.seekg(33); |
| 652 | int compression = read<int>(is); |
| 653 | compression = compression > 0 ? compression : 0; |
| 654 | |
| 655 | while (is.good() && pos < endpos) { |
| 656 | is.seekg(pos); |
| 657 | int lcdata = read<int>(is); |
| 658 | if (lcdata == 0) { |
| 659 | break; |
| 660 | } |
| 661 | if (lcdata < 0) { |
| 662 | pos -= lcdata; |
| 663 | continue; |
| 664 | } |
| 665 | short version = read<short>(is); |
| 666 | size_t ldata = read<unsigned int>(is); |
| 667 | is.seekg(4, is.cur); // skip the date |
| 668 | size_t lkey = read<unsigned short int>(is); |
| 669 | short cycle = read<short>(is); |
| 670 | long int pseek; |
| 671 | if (version > 1000) { |
| 672 | is.seekg(8, is.cur); |
| 673 | pseek = read<long int>(is); |
| 674 | } else { |
| 675 | is.seekg(4, is.cur); |
| 676 | pseek = read<int>(is); |
| 677 | } |
| 678 | std::string cname(read<unsigned char>(is), 0); |
| 679 | is.read(&cname[0], cname.size()); |
| 680 | std::string name(read<unsigned char>(is), 0); |
| 681 | is.read(&name[0], name.size()); |
| 682 | std::string title(read<unsigned char>(is), 0); |
| 683 | is.read(&title[0], title.size()); |
| 684 | |
| 685 | auto type = ContentType::Invalid; |
| 686 | if (cname.size() == 4 && cname.substr(0, 3) == "TH1") { |
| 687 | type = histType(cname[3]); |
| 688 | } else if (cname == "TTree") |
| 689 | type = ContentType::Tree; |
| 690 | else if (cname.substr(0, 7) == "TNtuple") |
| 691 | type = ContentType::NTuple; |
| 692 | else if (cname == "TBasket") |