diff options
Diffstat (limited to 'linux/include/linux/xz.h')
| -rw-r--r-- | linux/include/linux/xz.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/linux/include/linux/xz.h b/linux/include/linux/xz.h index 810cb10..0a4b38d 100644 --- a/linux/include/linux/xz.h +++ b/linux/include/linux/xz.h @@ -251,6 +251,22 @@ XZ_EXTERN void xz_dec_end(struct xz_dec *s); # endif #endif +/* + * If CRC64 support has been enabled with XZ_USE_CRC64, a CRC64 + * implementation is needed too. + */ +#ifndef XZ_USE_CRC64 +# undef XZ_INTERNAL_CRC64 +# define XZ_INTERNAL_CRC64 0 +#endif +#ifndef XZ_INTERNAL_CRC64 +# ifdef __KERNEL__ +# error Using CRC64 in the kernel has not been implemented. +# else +# define XZ_INTERNAL_CRC64 1 +# endif +#endif + #if XZ_INTERNAL_CRC32 /* * This must be called before any other xz_* function to initialize @@ -266,6 +282,21 @@ XZ_EXTERN void xz_crc32_init(void); XZ_EXTERN uint32_t xz_crc32(const uint8_t *buf, size_t size, uint32_t crc); #endif +#if XZ_INTERNAL_CRC64 +/* + * This must be called before any other xz_* function (except xz_crc32_init()) + * to initialize the CRC64 lookup table. + */ +XZ_EXTERN void xz_crc64_init(void); + +/* + * Update CRC64 value using the polynomial from ECMA-182. 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. + */ +XZ_EXTERN uint64_t xz_crc64(const uint8_t *buf, size_t size, uint64_t crc); +#endif + #ifdef __cplusplus } #endif |