archival/*: shrink by reusing sufficiently similar functions

function                                             old     new   delta
append_ext                                             -      16     +16
unxz_main                                             77      83      +6
unlzma_main                                           77      83      +6
uncompress_main                                       42      48      +6
gzip_main                                            184     190      +6
bzip2_main                                           114     120      +6
bunzip2_main                                          61      67      +6
bbunpack                                             469     475      +6
send_tree                                            355     360      +5
lzop_main                                             89      92      +3
gunzip_main                                           61      64      +3
make_new_name_lzop                                    84      82      -2
make_new_name_gunzip                                 114     112      -2
make_new_name_unxz                                    14       -     -14
make_new_name_unlzma                                  14       -     -14
make_new_name_uncompress                              14       -     -14
make_new_name_bunzip2                                 14       -     -14
make_new_name_gzip                                    17       -     -17
make_new_name_bzip2                                   17       -     -17
------------------------------------------------------------------------------
(add/remove: 1/6 grow/shrink: 10/2 up/down: 69/-94)           Total: -25 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/include/unarchive.h b/include/unarchive.h
index 783a943b6..aa7ecec55 100644
--- a/include/unarchive.h
+++ b/include/unarchive.h
@@ -155,9 +155,12 @@ IF_DESKTOP(long long) int unpack_Z_stream(int src_fd, int dst_fd) 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;
 
+char* append_ext(char *filename, const char *expected_ext) FAST_FUNC;
 int bbunpack(char **argv,
-             char* (*make_new_name)(char *filename),
-             IF_DESKTOP(long long) int (*unpacker)(unpack_info_t *info)) FAST_FUNC;
+            IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(unpack_info_t *info),
+            char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
+            const char *expected_ext
+) FAST_FUNC;
 
 #if BB_MMU
 void open_transformer(int fd,