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update seamless uncompression code

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This change makes "tar tf hello_world.txz" work without
adding special-casing for ".txz" extension. It also removes
ever-growing magic checking code in rpm2cpio and get_header_tar -
we reuse one which lives in setup_unzip_on_fd.

function                                             old     new   delta
unpack_gz_stream                                       7     566    +559
check_signature16                                      -      70     +70
setup_unzip_on_fd                                     99     142     +43
handle_SIGCHLD                                         -      41     +41
unpack_bz2_stream                                    342     376     +34
unzip_main                                          2352    2385     +33
bbunpack                                             503     533     +30
open_transformer                                      74     102     +28
unpack_Z_stream                                     1278    1304     +26
unpack_gunzip                                        101     123     +22
init_transformer_aux_data                              -      18     +18
unpack_xz_stream                                    2388    2402     +14
open_zipped                                          131     141     +10
rpm_main                                            1358    1363      +5
get_header_tar_lzma                                   52      57      +5
get_header_tar_bz2                                    52      57      +5
unpack_lzma_stream                                  2698    2702      +4
hash_find                                            234     233      -1
get_header_tar                                      1759    1733     -26
get_header_tar_gz                                     92      57     -35
unpack_uncompress                                     51      12     -39
rpm2cpio_main                                        201     147     -54
unpack_unxz                                           67      12     -55
unpack_bz2_stream_prime                               55       -     -55
get_header_tar_Z                                      86       -     -86
unpack_gz_stream_with_info                           539       -    -539
------------------------------------------------------------------------------
(add/remove: 3/3 grow/shrink: 14/6 up/down: 947/-890)          Total: 57 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2012-03-06 16:27:48 +01:00
parent 774bce8e8b
commit 8a6a2f9c9c
21 changed files with 231 additions and 310 deletions
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27
archival/libarchive/decompress_gunzip.c
View File

@@ -1034,22 +1034,22 @@ inflate_unzip_internal(STATE_PARAM int in, int out)
/* For unzip */
IF_DESKTOP(long long) int FAST_FUNC
inflate_unzip(inflate_unzip_result *res, off_t compr_size, int in, int out)
inflate_unzip(transformer_aux_data_t *aux, int in, int out)
{
IF_DESKTOP(long long) int n;
DECLARE_STATE;
ALLOC_STATE;
to_read = compr_size;
to_read = aux->bytes_in;
// bytebuffer_max = 0x8000;
bytebuffer_offset = 4;
bytebuffer = xmalloc(bytebuffer_max);
n = inflate_unzip_internal(PASS_STATE in, out);
free(bytebuffer);
res->crc = gunzip_crc;
res->bytes_out = gunzip_bytes_out;
aux->crc32 = gunzip_crc;
aux->bytes_out = gunzip_bytes_out;
DEALLOC_STATE;
return n;
}
@@ -1107,7 +1107,7 @@ static uint32_t buffer_read_le_u32(STATE_PARAM_ONLY)
return res;
}
static int check_header_gzip(STATE_PARAM unpack_info_t *info)
static int check_header_gzip(STATE_PARAM transformer_aux_data_t *aux)
{
union {
unsigned char raw[8];
@@ -1169,8 +1169,8 @@ static int check_header_gzip(STATE_PARAM unpack_info_t *info)
}
}
if (info)
info->mtime = SWAP_LE32(header.formatted.mtime);
if (aux)
aux->mtime = SWAP_LE32(header.formatted.mtime);
/* Read the header checksum */
if (header.formatted.flags & 0x02) {
@@ -1182,12 +1182,15 @@ static int check_header_gzip(STATE_PARAM unpack_info_t *info)
}
IF_DESKTOP(long long) int FAST_FUNC
unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info)
unpack_gz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
{
uint32_t v32;
IF_DESKTOP(long long) int total, n;
DECLARE_STATE;
if (check_signature16(aux, src_fd, GZIP_MAGIC))
return -1;
total = 0;
ALLOC_STATE;
@@ -1197,7 +1200,7 @@ unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info)
gunzip_src_fd = src_fd;
again:
if (!check_header_gzip(PASS_STATE info)) {
if (!check_header_gzip(PASS_STATE aux)) {
bb_error_msg("corrupted data");
total = -1;
goto ret;
@@ -1248,9 +1251,3 @@ unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info)
DEALLOC_STATE;
return total;
}
IF_DESKTOP(long long) int FAST_FUNC
unpack_gz_stream(int in, int out)
{
return unpack_gz_stream_with_info(in, out, NULL);
}