XXH64 family

Contains functions used in the classic 64-bit xxHash algorithm. More...

Collaboration diagram for XXH64 family:

Classes
struct	XXH64_canonical_t

Typedefs
typedef struct XXH64_state_s	XXH64_state_t
	The opaque state struct for the XXH64 streaming API.

Functions
XXH_PUBLIC_API XXH_PUREF XXH64_hash_t	XXH64 (XXH_NOESCAPE const void *input, size_t length, XXH64_hash_t seed)
	Calculates the 64-bit hash of input using xxHash64.
XXH_PUBLIC_API XXH_MALLOCF XXH64_state_t *	XXH64_createState (void)
XXH_PUBLIC_API XXH_errorcode	XXH64_freeState (XXH64_state_t *statePtr)
XXH_PUBLIC_API void	XXH64_copyState (XXH_NOESCAPE XXH64_state_t *dst_state, const XXH64_state_t *src_state)
XXH_PUBLIC_API XXH_errorcode	XXH64_reset (XXH_NOESCAPE XXH64_state_t *statePtr, XXH64_hash_t seed)
XXH_PUBLIC_API XXH_errorcode	XXH64_update (XXH_NOESCAPE XXH64_state_t *statePtr, XXH_NOESCAPE const void *input, size_t length)
XXH_PUBLIC_API XXH_PUREF XXH64_hash_t	XXH64_digest (XXH_NOESCAPE const XXH64_state_t *statePtr)
XXH_PUBLIC_API void	XXH64_canonicalFromHash (XXH_NOESCAPE XXH64_canonical_t *dst, XXH64_hash_t hash)
XXH_PUBLIC_API XXH_PUREF XXH64_hash_t	XXH64_hashFromCanonical (XXH_NOESCAPE const XXH64_canonical_t *src)

Detailed Description

Contains functions used in the classic 64-bit xxHash algorithm.

Note

XXH3 provides competitive speed for both 32-bit and 64-bit systems, and offers true 64/128 bit hash results. It provides better speed for systems with vector processing capabilities.

Typedef Documentation

XXH64_state_t

typedef struct XXH64_state_s XXH64_state_t

The opaque state struct for the XXH64 streaming API.

See also

XXH64_state_s for details.

Definition at line 844 of file xxhash.h.

Function Documentation

XXH64()

XXH_PUBLIC_API XXH_PUREF XXH64_hash_t XXH64	(	XXH_NOESCAPE const void *	input,
		size_t	length,
		XXH64_hash_t	seed )

Calculates the 64-bit hash of input using xxHash64.

This function usually runs faster on 64-bit systems, but slower on 32-bit systems (see benchmark).

Parameters

input	The block of data to be hashed, at least length bytes in size.
length	The length of input, in bytes.
seed	The 64-bit seed to alter the hash's output predictably.

Precondition

The memory between input and input + length must be valid, readable, contiguous memory. However, if length is 0, input may be NULL. In C++, this also must be TriviallyCopyable.

Returns

The calculated 64-bit hash.

See also

XXH32(), XXH3_64bits_withSeed(), XXH3_128bits_withSeed(), XXH128(): Direct equivalents for the other variants of xxHash.

XXH64_createState(), XXH64_update(), XXH64_digest(): Streaming version.

XXH64_canonicalFromHash()

XXH_PUBLIC_API void XXH64_canonicalFromHash	(	XXH_NOESCAPE XXH64_canonical_t *	dst,
		XXH64_hash_t	hash )

XXH64_copyState()

XXH_PUBLIC_API void XXH64_copyState	(	XXH_NOESCAPE XXH64_state_t *	dst_state,
		const XXH64_state_t *	src_state )

XXH64_createState()

XXH_PUBLIC_API XXH_MALLOCF XXH64_state_t * XXH64_createState

(

void

)

XXH64_digest()

XXH_PUBLIC_API XXH_PUREF XXH64_hash_t XXH64_digest

(

XXH_NOESCAPE const XXH64_state_t *

statePtr

)

XXH64_freeState()

XXH_PUBLIC_API XXH_errorcode XXH64_freeState

(

XXH64_state_t *

statePtr

)

XXH64_hashFromCanonical()

XXH_PUBLIC_API XXH_PUREF XXH64_hash_t XXH64_hashFromCanonical

(

XXH_NOESCAPE const XXH64_canonical_t *

src

)

XXH64_reset()

XXH_PUBLIC_API XXH_errorcode XXH64_reset	(	XXH_NOESCAPE XXH64_state_t *	statePtr,
		XXH64_hash_t	seed )

XXH64_update()

XXH_PUBLIC_API XXH_errorcode XXH64_update	(	XXH_NOESCAPE XXH64_state_t *	statePtr,
		XXH_NOESCAPE const void *	input,
		size_t	length )