const file_tree_checksum& data_tree_checksum(bool reset)
{
	static file_tree_checksum checksum;
	if (reset)
		checksum.reset();
	if(checksum.nfiles == 0) {
		get_file_tree_checksum_internal("data/",checksum);
		get_file_tree_checksum_internal(get_user_data_dir() + "/data/",checksum);
		LOG_FS << "calculated data tree checksum: "
			   << checksum.nfiles << " files; "
			   << checksum.sum_size << " bytes\n";
	}

	return checksum;
}
Unknown