diff options
Diffstat (limited to 'archival/libunarchive/decompress_unxz.c')
| -rw-r--r-- | archival/libunarchive/decompress_unxz.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/archival/libunarchive/decompress_unxz.c b/archival/libunarchive/decompress_unxz.c index 924a52513..374b76d66 100644 --- a/archival/libunarchive/decompress_unxz.c +++ b/archival/libunarchive/decompress_unxz.c @@ -16,9 +16,13 @@ #define XZ_FUNC FAST_FUNC #define XZ_EXTERN static -#define xz_crc32_init(table) crc32_filltable(table, /*endian:*/ 0) -static uint32_t xz_crc32(uint32_t *crc32_table, - const uint8_t *buf, size_t size, uint32_t crc) +/* Skip check (rather than fail) of unsupported hash functions */ +#define XZ_DEC_ANY_CHECK 1 + +/* We use our own crc32 function */ +#define XZ_INTERNAL_CRC32 0 +static uint32_t *crc32_table; +static uint32_t xz_crc32(const uint8_t *buf, size_t size, uint32_t crc) { crc = ~crc; @@ -29,8 +33,8 @@ static uint32_t xz_crc32(uint32_t *crc32_table, return ~crc; } -#define xz_crc32 xz_crc32 +/* We use arch-optimized unaligned accessors */ #define get_unaligned_le32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_LE32(v); }) #define get_unaligned_be32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_BE32(v); }) #define put_unaligned_le32(val, buf) move_to_unaligned16(buf, SWAP_LE32(val)) @@ -64,8 +68,10 @@ unpack_xz_stream(int src_fd, int dst_fd) iobuf.out = membuf + IN_SIZE; iobuf.out_size = OUT_SIZE; + if (!crc32_table) + crc32_table = crc32_filltable(NULL, /*endian:*/ 0); + state = xz_dec_init(64*1024); /* initial dict of 64k */ - xz_crc32_init(state->crc32_table); while (1) { enum xz_ret r; @@ -102,7 +108,7 @@ unpack_xz_stream(int src_fd, int dst_fd) ) { break; } - if (r != XZ_OK) { + if (r != XZ_OK && r != XZ_UNSUPPORTED_CHECK) { bb_error_msg("corrupted data"); total = -1; break; |