Method mount

lib/vfs/zdos.cc:257–290

private:
    void mount()
    {
        _sectorsPerTrack =
            _diskLayout->layoutByLogicalLocation.at({0, 0})->numSectors;

        int rootBlock = toBlockNumber(_config.filesystem_start().sector(),
            _config.filesystem_start().track());
        ZDosDescriptor zd(this, rootBlock);
        if (zd.type != ZDOS_TYPE_DIRECTORY)
            throw BadFilesystemException();

        _totalBlocks = getLogicalSectorCount();
        _usedBlocks = (zd.recordCount * zd.recordSize) / 0x80 + 1;
        while (!zd.eof)
        {
            Bytes bytes = zd.readRecord();
            ByteReader br(bytes);
            for (;;)
            {
                int len = br.read_8();
                if (len == 0xff)
                    break;

                std::string filename = br.read(len & 0x7f);
                int descriptorBlock = readBlockNumber(br);

                auto dirent = std::make_unique<ZDosDirent>(
                    this, filename, descriptorBlock);
                _usedBlocks +=
                    (dirent->zd.recordCount * dirent->zd.recordSize) / 0x80 + 1;
                _dirents.push_back(std::move(dirent));
            }
        }
    }

    std::shared_ptr<ZDosDirent> findFile(const std::string filename)
    {