comparison contrib/python-zstandard/zstd/common/xxhash.h @ 37495:b1fb341d8a61

zstandard: vendor python-zstandard 0.9.0

This was just released. It features a number of goodies. More info at
https://gregoryszorc.com/blog/2018/04/09/release-of-python-zstandard-0.9/.

The clang-format ignore list was updated to reflect the new source
of files.

The project contains a vendored copy of zstandard 1.3.4. The old
version was 1.1.3. One of the changes between those versions is that
zstandard is now dual licensed BSD + GPLv2 and the patent rights grant
has been removed. Good riddance.

The API should be backwards compatible. So no changes in core
should be needed. However, there were a number of changes in the
library that we'll want to adapt to. Those will be addressed in
subsequent commits.

Differential Revision: https://phab.mercurial-scm.org/D3198

37494:1ce7a55b09d1

Name     Speed on 64 bits    Speed on 32 bits
XXH64       13.8 GB/s            1.9 GB/s
XXH32        6.8 GB/s            6.0 GB/s
*/

#ifndef XXHASH_H_5627135585666179
#define XXHASH_H_5627135585666179 1

#if defined (__cplusplus)
extern "C" {
#endif

#ifndef XXH_NAMESPACE
#  define XXH_NAMESPACE ZSTD_  /* Zstandard specific */
#endif


/* ****************************
*  Definitions
******************************/

/* **************************
*  Canonical representation
****************************/
typedef struct { unsigned char digest[4]; } XXH32_canonical_t;
typedef struct { unsigned char digest[8]; } XXH64_canonical_t;

XXH_PUBLIC_API void XXH32_canonicalFromHash(XXH32_canonical_t* dst, XXH32_hash_t hash);
XXH_PUBLIC_API void XXH64_canonicalFromHash(XXH64_canonical_t* dst, XXH64_hash_t hash);

XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical(const XXH32_canonical_t* src);
XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical(const XXH64_canonical_t* src);

/* Default result type for XXH functions are primitive unsigned 32 and 64 bits.
*  The canonical representation uses human-readable write convention, aka big-endian (large digits first).
*  These functions allow transformation of hash result into and from its canonical format.
*  This way, hash values can be written into a file / memory, and remain comparable on different systems and programs.
*/


#ifdef XXH_STATIC_LINKING_ONLY

/* ================================================================================================
   This section contains definitions which are not guaranteed to remain stable.
   They may change in future versions, becoming incompatible with a different version of the library.
   They shall only be used with static linking.
   Never use these definitions in association with dynamic linking !
=================================================================================================== */

/* These definitions are only meant to allow allocation of XXH state
   statically, on stack, or in a struct for example.
   Do not use members directly. */

#  ifdef XXH_PRIVATE_API
#    include "xxhash.c"   /* include xxhash functions as `static`, for inlining */
#  endif

#endif /* XXH_STATIC_LINKING_ONLY */


#if defined (__cplusplus)
}
#endif

#endif /* XXHASH_H_5627135585666179 */

37495:b1fb341d8a61

Name     Speed on 64 bits    Speed on 32 bits
XXH64       13.8 GB/s            1.9 GB/s
XXH32        6.8 GB/s            6.0 GB/s
*/

#if defined (__cplusplus)
extern "C" {
#endif

#ifndef XXHASH_H_5627135585666179
#define XXHASH_H_5627135585666179 1


/* ****************************
*  Definitions
******************************/

/* **************************
*  Canonical representation
****************************/
/* Default result type for XXH functions are primitive unsigned 32 and 64 bits.
*  The canonical representation uses human-readable write convention, aka big-endian (large digits first).
*  These functions allow transformation of hash result into and from its canonical format.
*  This way, hash values can be written into a file / memory, and remain comparable on different systems and programs.
*/
typedef struct { unsigned char digest[4]; } XXH32_canonical_t;
typedef struct { unsigned char digest[8]; } XXH64_canonical_t;

XXH_PUBLIC_API void XXH32_canonicalFromHash(XXH32_canonical_t* dst, XXH32_hash_t hash);
XXH_PUBLIC_API void XXH64_canonicalFromHash(XXH64_canonical_t* dst, XXH64_hash_t hash);

XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical(const XXH32_canonical_t* src);
XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical(const XXH64_canonical_t* src);

#endif /* XXHASH_H_5627135585666179 */



/* ================================================================================================
   This section contains definitions which are not guaranteed to remain stable.
   They may change in future versions, becoming incompatible with a different version of the library.
   They shall only be used with static linking.
   Never use these definitions in association with dynamic linking !
=================================================================================================== */
#if defined(XXH_STATIC_LINKING_ONLY) && !defined(XXH_STATIC_H_3543687687345)
#define XXH_STATIC_H_3543687687345

/* These definitions are only meant to allow allocation of XXH state
   statically, on stack, or in a struct for example.
   Do not use members directly. */

#  ifdef XXH_PRIVATE_API
#    include "xxhash.c"   /* include xxhash functions as `static`, for inlining */
#  endif

#endif /* XXH_STATIC_LINKING_ONLY && XXH_STATIC_H_3543687687345 */


#if defined (__cplusplus)
}
#endif