Method getFile

lib/vfs/prodos.cc:192–245

    }

    Bytes getFile(const Path& path) override
    {
        mount();

        auto dir = chdir(path.parent());
        auto dirent = dir->find(path.back());

        Bytes bytes;
        switch (dirent->storageType)
        {
            case STORAGETYPE_SUBDIR:
                throw BadPathException("tried to use a directory like a file");

            case STORAGETYPE_SEEDLING:
                bytes = getLogicalBlock(dirent->keyBlock);
                break;

            case STORAGETYPE_SAPLING:
            {
                auto keyBytes = getLogicalBlock(dirent->keyBlock);
                ByteWriter bw(bytes);
                readIndexBlock(keyBytes, bw);
                break;
            }

            case STORAGETYPE_TREE:
            {
                auto masterKeyBytes = getLogicalBlock(dirent->keyBlock);
                ByteWriter bw(bytes);
                ByteReader br(masterKeyBytes);

                /* This always appends 16MB of data, the maximum amount
                 * for a tree file, which is wasteful but simple.
                 */

                while (!br.eof())
                {
                    uint16_t indexBlock = br.read_le16();
                    if (indexBlock)
                        readIndexBlock(getLogicalBlock(indexBlock), bw);
                    else
                        bw += Bytes(128 * 1024);
                }
                break;
            }

            default:
                throw UnimplementedFilesystemException(
                    fmt::format("storage type 0x{:x} isn't supported yet",
                        dirent->storageType));
        }

        return bytes.slice(0, dirent->length);
    }

private:
    void mount()