diff options
Diffstat (limited to 'src/lib/info_file_checker.cc')
| -rw-r--r-- | src/lib/info_file_checker.cc | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/lib/info_file_checker.cc b/src/lib/info_file_checker.cc new file mode 100644 index 000000000..1e277a5ac --- /dev/null +++ b/src/lib/info_file_checker.cc @@ -0,0 +1,62 @@ +/* + Copyright (C) 2024 Carl Hetherington <cth@carlh.net> + + This file is part of DCP-o-matic. + + DCP-o-matic is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + DCP-o-matic is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>. + +*/ + + +#include "info_file_checker.h" +#include <dcp/filesystem.h> + +#include "i18n.h" + + +using std::shared_ptr; + + +InfoFileChecker::InfoFileChecker(dcp::File& file) + : _file(file) + , _next(_file) +{ + +} + + +void +InfoFileChecker::check(int64_t offset, uint8_t const* data, int length) +{ + while (_next && offset <= static_cast<int64_t>(_next->offset) && _next->offset < static_cast<uint64_t>(offset + length)) { + auto hash_start_offset = _next->offset - offset; + auto hash_length = std::min(_next->size, length - hash_start_offset); + _digester.add(data + hash_start_offset, hash_length); + _next->offset += hash_length; + _next->size -= hash_length; + if (_next->size == 0) { + if (_digester.get_vector() != _next->hash) { + throw EncodeError(_("File on disk is corrupted")); + } + + _next = boost::none; + try { + _next = J2KFrameInfo(_file); + } catch (...) {} + + _digester = Digester(); + } + } +} + |