diff options
Diffstat (limited to 'archival/libunarchive/unxz/xz.h')
| -rw-r--r-- | archival/libunarchive/unxz/xz.h | 58 |
1 files changed, 36 insertions, 22 deletions
diff --git a/archival/libunarchive/unxz/xz.h b/archival/libunarchive/unxz/xz.h index dbb9ba92d..eb82706b9 100644 --- a/archival/libunarchive/unxz/xz.h +++ b/archival/libunarchive/unxz/xz.h @@ -31,20 +31,29 @@ /** * enum xz_ret - Return codes - * @XZ_OK: Everything is OK so far. More input or more output - * space is required to continue. - * @XZ_STREAM_END: Operation finished successfully. - * @XZ_MEMLIMIT_ERROR: Not enough memory was preallocated at decoder - * initialization time. - * @XZ_FORMAT_ERROR: File format was not recognized (wrong magic bytes). - * @XZ_OPTIONS_ERROR: This implementation doesn't support the requested - * compression options. In the decoder this means that - * the header CRC32 matches, but the header itself - * specifies something that we don't support. - * @XZ_DATA_ERROR: Compressed data is corrupt. - * @XZ_BUF_ERROR: Cannot make any progress. Details are slightly - * different between multi-call and single-call mode; - * more information below. + * @XZ_OK: Everything is OK so far. More input or more + * output space is required to continue. + * @XZ_STREAM_END: Operation finished successfully. + * @XZ_UNSUPPORTED_CHECK: Integrity check type is not supported. Decoding + * is still possible in multi-call mode by simply + * calling xz_dec_run() again. + * NOTE: This return value is used only if + * XZ_DEC_ANY_CHECK was defined at build time, + * which is not used in the kernel. Unsupported + * check types return XZ_OPTIONS_ERROR if + * XZ_DEC_ANY_CHECK was not defined at build time. + * @XZ_MEMLIMIT_ERROR: Not enough memory was preallocated at decoder + * initialization time. + * @XZ_FORMAT_ERROR: File format was not recognized (wrong magic + * bytes). + * @XZ_OPTIONS_ERROR: This implementation doesn't support the requested + * compression options. In the decoder this means + * that the header CRC32 matches, but the header + * itself specifies something that we don't support. + * @XZ_DATA_ERROR: Compressed data is corrupt. + * @XZ_BUF_ERROR: Cannot make any progress. Details are slightly + * different between multi-call and single-call + * mode; more information below. * * In multi-call mode, XZ_BUF_ERROR is returned when two consecutive calls * to XZ code cannot consume any input and cannot produce any new output. @@ -62,6 +71,7 @@ enum xz_ret { XZ_OK, XZ_STREAM_END, + XZ_UNSUPPORTED_CHECK, XZ_MEMLIMIT_ERROR, XZ_FORMAT_ERROR, XZ_OPTIONS_ERROR, @@ -129,7 +139,7 @@ struct xz_dec; * * Because the output buffer is used as the workspace, streams encoded using * a big dictionary are not a problem in single-call. It is enough that the - * output buffer is is big enough to hold the actual uncompressed data; it + * output buffer is big enough to hold the actual uncompressed data; it * can be smaller than the dictionary size stored in the stream headers. * * On success, xz_dec_init() returns a pointer to struct xz_dec, which is @@ -186,23 +196,27 @@ XZ_EXTERN void XZ_FUNC xz_dec_end(struct xz_dec *s); * CRC32 module is used instead, and users of this module don't need to * care about the functions below. */ -#if !defined(__KERNEL__) || defined(XZ_INTERNAL_CRC32) +#ifndef XZ_INTERNAL_CRC32 +# ifdef __KERNEL__ +# define XZ_INTERNAL_CRC32 0 +# else +# define XZ_INTERNAL_CRC32 1 +# endif +#endif + +#if XZ_INTERNAL_CRC32 /* * This must be called before any other xz_* function to initialize * the CRC32 lookup table. */ -#ifndef xz_crc32_init -XZ_EXTERN void XZ_FUNC xz_crc32_init(uint32_t *crc32_table); -#endif +XZ_EXTERN void XZ_FUNC xz_crc32_init(void); /* * Update CRC32 value using the polynomial from IEEE-802.3. To start a new * calculation, the third argument must be zero. To continue the calculation, * the previously returned value is passed as the third argument. */ -#ifndef xz_crc32 -XZ_EXTERN uint32_t XZ_FUNC xz_crc32(uint32_t *crc32_table, +XZ_EXTERN uint32_t XZ_FUNC xz_crc32( const uint8_t *buf, size_t size, uint32_t crc); #endif #endif -#endif |