+typedef struct archive_handle_t {
+ /* Define if the header and data component should be processed */
+ char FAST_FUNC (*filter)(struct archive_handle_t *);
+ llist_t *accept;
+ /* List of files that have been rejected */
+ llist_t *reject;
+ /* List of files that have successfully been worked on */
+ llist_t *passed;
+
+ /* Contains the processed header entry */
+ file_header_t *file_header;
+
+ /* Process the header component, e.g. tar -t */
+ void FAST_FUNC (*action_header)(const file_header_t *);
+
+ /* Process the data component, e.g. extract to filesystem */
+ void FAST_FUNC (*action_data)(struct archive_handle_t *);
+
+#if ENABLE_DPKG || ENABLE_DPKG_DEB
+ /* "subarchive" is used only by dpkg[-deb] applets */
+ /* How to process any sub archive, e.g. get_header_tar_gz */
+ char FAST_FUNC (*action_data_subarchive)(struct archive_handle_t *);
+ /* Contains the handle to a sub archive */
+ struct archive_handle_t *sub_archive;
+#endif
+
+ /* The raw stream as read from disk or stdin */
+ int src_fd;
+
+ /* Count the number of bytes processed */
+ off_t offset;
+
+ /* Function that skips data */
+ void FAST_FUNC (*seek)(int fd, off_t amount);
+
+ /* Temporary storage */
+ char *buffer;
+
+ /* Flags and misc. stuff */
+ unsigned char ah_flags;
+
+ /* "Private" storage for archivers */
+// unsigned char ah_priv_inited;
+ void *ah_priv[8];
+
+} archive_handle_t;
+
+
+/* Info struct unpackers can fill out to inform users of thing like
+ * timestamps of unpacked files */
+typedef struct unpack_info_t {
+ time_t mtime;
+} unpack_info_t;
+
+extern archive_handle_t *init_handle(void) FAST_FUNC;
+
+extern char filter_accept_all(archive_handle_t *archive_handle) FAST_FUNC;
+extern char filter_accept_list(archive_handle_t *archive_handle) FAST_FUNC;
+extern char filter_accept_list_reassign(archive_handle_t *archive_handle) FAST_FUNC;
+extern char filter_accept_reject_list(archive_handle_t *archive_handle) FAST_FUNC;
+
+extern void unpack_ar_archive(archive_handle_t *ar_archive) FAST_FUNC;
+
+extern void data_skip(archive_handle_t *archive_handle) FAST_FUNC;
+extern void data_extract_all(archive_handle_t *archive_handle) FAST_FUNC;
+extern void data_extract_to_stdout(archive_handle_t *archive_handle) FAST_FUNC;
+extern void data_extract_to_buffer(archive_handle_t *archive_handle) FAST_FUNC;
+
+extern void header_skip(const file_header_t *file_header) FAST_FUNC;
+extern void header_list(const file_header_t *file_header) FAST_FUNC;
+extern void header_verbose_list(const file_header_t *file_header) FAST_FUNC;
+
+extern char get_header_ar(archive_handle_t *archive_handle) FAST_FUNC;
+extern char get_header_cpio(archive_handle_t *archive_handle) FAST_FUNC;
+extern char get_header_tar(archive_handle_t *archive_handle) FAST_FUNC;
+extern char get_header_tar_gz(archive_handle_t *archive_handle) FAST_FUNC;
+extern char get_header_tar_bz2(archive_handle_t *archive_handle) FAST_FUNC;
+extern char get_header_tar_lzma(archive_handle_t *archive_handle) FAST_FUNC;
+
+extern void seek_by_jump(int fd, off_t amount) FAST_FUNC;
+extern void seek_by_read(int fd, off_t amount) FAST_FUNC;
+
+extern void data_align(archive_handle_t *archive_handle, unsigned boundary) FAST_FUNC;
+extern const llist_t *find_list_entry(const llist_t *list, const char *filename) FAST_FUNC;
+extern const llist_t *find_list_entry2(const llist_t *list, const char *filename) FAST_FUNC;
+
+/* A bit of bunzip2 internals are exposed for compressed help support: */
+typedef struct bunzip_data bunzip_data;
+int start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *inbuf, int len) FAST_FUNC;
+int read_bunzip(bunzip_data *bd, char *outbuf, int len) FAST_FUNC;
+void dealloc_bunzip(bunzip_data *bd) FAST_FUNC;
+
+typedef struct inflate_unzip_result {
+ off_t bytes_out;
+ uint32_t crc;
+} inflate_unzip_result;
+
+IF_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, off_t compr_size, int src_fd, int dst_fd) FAST_FUNC;
+/* lzma unpacker takes .lzma stream from offset 0 */
+IF_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd) FAST_FUNC;
+/* the rest wants 2 first bytes already skipped by the caller */
+IF_DESKTOP(long long) int unpack_bz2_stream(int src_fd, int dst_fd) FAST_FUNC;
+IF_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd) FAST_FUNC;
+IF_DESKTOP(long long) int unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info) FAST_FUNC;
+IF_DESKTOP(long long) int unpack_Z_stream(int fd_in, int fd_out) FAST_FUNC;
+/* wrapper which checks first two bytes to be "BZ" */
+IF_DESKTOP(long long) int unpack_bz2_stream_prime(int src_fd, int dst_fd) FAST_FUNC;