mirror of
https://github.com/ZDoom/raze-gles.git
synced 2024-11-18 02:01:39 +00:00
587 lines
27 KiB
C
587 lines
27 KiB
C
/*
|
|
xxHash - Extremely Fast Hash algorithm
|
|
Header File
|
|
Copyright (C) 2012-2016, Yann Collet.
|
|
|
|
BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are
|
|
met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above
|
|
copyright notice, this list of conditions and the following disclaimer
|
|
in the documentation and/or other materials provided with the
|
|
distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
You can contact the author at :
|
|
- xxHash source repository : https://github.com/Cyan4973/xxHash
|
|
*/
|
|
|
|
/* Notice extracted from xxHash homepage :
|
|
|
|
xxHash is an extremely fast Hash algorithm, running at RAM speed limits.
|
|
It also successfully passes all tests from the SMHasher suite.
|
|
|
|
Comparison (single thread, Windows Seven 32 bits, using SMHasher on a Core 2 Duo @3GHz)
|
|
|
|
Name Speed Q.Score Author
|
|
xxHash 5.4 GB/s 10
|
|
CrapWow 3.2 GB/s 2 Andrew
|
|
MumurHash 3a 2.7 GB/s 10 Austin Appleby
|
|
SpookyHash 2.0 GB/s 10 Bob Jenkins
|
|
SBox 1.4 GB/s 9 Bret Mulvey
|
|
Lookup3 1.2 GB/s 9 Bob Jenkins
|
|
SuperFastHash 1.2 GB/s 1 Paul Hsieh
|
|
CityHash64 1.05 GB/s 10 Pike & Alakuijala
|
|
FNV 0.55 GB/s 5 Fowler, Noll, Vo
|
|
CRC32 0.43 GB/s † 9
|
|
MD5-32 0.33 GB/s 10 Ronald L. Rivest
|
|
SHA1-32 0.28 GB/s 10
|
|
|
|
Note †: other CRC32 implementations can be over 40x faster than SMHasher's:
|
|
http://fastcompression.blogspot.com/2019/03/presenting-xxh3.html?showComment=1552696407071#c3490092340461170735
|
|
|
|
Q.Score is a measure of quality of the hash function.
|
|
It depends on successfully passing SMHasher test set.
|
|
10 is a perfect score.
|
|
|
|
A 64-bit version, named XXH64, is available since r35.
|
|
It offers much better speed, but for 64-bit applications only.
|
|
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
|
|
|
|
|
|
/* ****************************
|
|
* Definitions
|
|
******************************/
|
|
#include <stddef.h> /* size_t */
|
|
typedef enum { XXH_OK=0, XXH_ERROR } XXH_errorcode;
|
|
|
|
|
|
/* ****************************
|
|
* API modifier
|
|
******************************/
|
|
/** XXH_INLINE_ALL (and XXH_PRIVATE_API)
|
|
* This build macro includes xxhash functions in `static` mode
|
|
* in order to inline them, and remove their symbol from the public list.
|
|
* Inlining offers great performance improvement on small keys,
|
|
* and dramatic ones when length is expressed as a compile-time constant.
|
|
* See https://fastcompression.blogspot.com/2018/03/xxhash-for-small-keys-impressive-power.html .
|
|
* Methodology :
|
|
* #define XXH_INLINE_ALL
|
|
* #include "xxhash.h"
|
|
* `xxhash.c` is automatically included.
|
|
* It's not useful to compile and link it as a separate object.
|
|
*/
|
|
#if defined(XXH_INLINE_ALL) || defined(XXH_PRIVATE_API)
|
|
# ifndef XXH_STATIC_LINKING_ONLY
|
|
# define XXH_STATIC_LINKING_ONLY
|
|
# endif
|
|
# if defined(__GNUC__)
|
|
# define XXH_PUBLIC_API static __inline __attribute__((unused))
|
|
# elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
|
|
# define XXH_PUBLIC_API static inline
|
|
# elif defined(_MSC_VER)
|
|
# define XXH_PUBLIC_API static __inline
|
|
# else
|
|
/* this version may generate warnings for unused static functions */
|
|
# define XXH_PUBLIC_API static
|
|
# endif
|
|
#else
|
|
# if defined(WIN32) && defined(_MSC_VER) && (defined(XXH_IMPORT) || defined(XXH_EXPORT))
|
|
# ifdef XXH_EXPORT
|
|
# define XXH_PUBLIC_API __declspec(dllexport)
|
|
# elif XXH_IMPORT
|
|
# define XXH_PUBLIC_API __declspec(dllimport)
|
|
# endif
|
|
# else
|
|
# define XXH_PUBLIC_API /* do nothing */
|
|
# endif
|
|
#endif /* XXH_INLINE_ALL || XXH_PRIVATE_API */
|
|
|
|
/*! XXH_NAMESPACE, aka Namespace Emulation :
|
|
*
|
|
* If you want to include _and expose_ xxHash functions from within your own library,
|
|
* but also want to avoid symbol collisions with other libraries which may also include xxHash,
|
|
*
|
|
* you can use XXH_NAMESPACE, to automatically prefix any public symbol from xxhash library
|
|
* with the value of XXH_NAMESPACE (therefore, avoid NULL and numeric values).
|
|
*
|
|
* Note that no change is required within the calling program as long as it includes `xxhash.h` :
|
|
* regular symbol name will be automatically translated by this header.
|
|
*/
|
|
#ifdef XXH_NAMESPACE
|
|
# define XXH_CAT(A,B) A##B
|
|
# define XXH_NAME2(A,B) XXH_CAT(A,B)
|
|
# define XXH_versionNumber XXH_NAME2(XXH_NAMESPACE, XXH_versionNumber)
|
|
# define XXH32 XXH_NAME2(XXH_NAMESPACE, XXH32)
|
|
# define XXH32_createState XXH_NAME2(XXH_NAMESPACE, XXH32_createState)
|
|
# define XXH32_freeState XXH_NAME2(XXH_NAMESPACE, XXH32_freeState)
|
|
# define XXH32_reset XXH_NAME2(XXH_NAMESPACE, XXH32_reset)
|
|
# define XXH32_update XXH_NAME2(XXH_NAMESPACE, XXH32_update)
|
|
# define XXH32_digest XXH_NAME2(XXH_NAMESPACE, XXH32_digest)
|
|
# define XXH32_copyState XXH_NAME2(XXH_NAMESPACE, XXH32_copyState)
|
|
# define XXH32_canonicalFromHash XXH_NAME2(XXH_NAMESPACE, XXH32_canonicalFromHash)
|
|
# define XXH32_hashFromCanonical XXH_NAME2(XXH_NAMESPACE, XXH32_hashFromCanonical)
|
|
# define XXH64 XXH_NAME2(XXH_NAMESPACE, XXH64)
|
|
# define XXH64_createState XXH_NAME2(XXH_NAMESPACE, XXH64_createState)
|
|
# define XXH64_freeState XXH_NAME2(XXH_NAMESPACE, XXH64_freeState)
|
|
# define XXH64_reset XXH_NAME2(XXH_NAMESPACE, XXH64_reset)
|
|
# define XXH64_update XXH_NAME2(XXH_NAMESPACE, XXH64_update)
|
|
# define XXH64_digest XXH_NAME2(XXH_NAMESPACE, XXH64_digest)
|
|
# define XXH64_copyState XXH_NAME2(XXH_NAMESPACE, XXH64_copyState)
|
|
# define XXH64_canonicalFromHash XXH_NAME2(XXH_NAMESPACE, XXH64_canonicalFromHash)
|
|
# define XXH64_hashFromCanonical XXH_NAME2(XXH_NAMESPACE, XXH64_hashFromCanonical)
|
|
#endif
|
|
|
|
|
|
/* *************************************
|
|
* Version
|
|
***************************************/
|
|
#define XXH_VERSION_MAJOR 0
|
|
#define XXH_VERSION_MINOR 7
|
|
#define XXH_VERSION_RELEASE 2
|
|
#define XXH_VERSION_NUMBER (XXH_VERSION_MAJOR *100*100 + XXH_VERSION_MINOR *100 + XXH_VERSION_RELEASE)
|
|
XXH_PUBLIC_API unsigned XXH_versionNumber (void);
|
|
|
|
|
|
/*-**********************************************************************
|
|
* 32-bit hash
|
|
************************************************************************/
|
|
#if !defined (__VMS) \
|
|
&& (defined (__cplusplus) \
|
|
|| (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
|
|
# include <stdint.h>
|
|
typedef uint32_t XXH32_hash_t;
|
|
#else
|
|
# include <limits.h>
|
|
# if UINT_MAX == 0xFFFFFFFFUL
|
|
typedef unsigned int XXH32_hash_t;
|
|
# else
|
|
# if ULONG_MAX == 0xFFFFFFFFUL
|
|
typedef unsigned long XXH32_hash_t;
|
|
# else
|
|
# error "unsupported platform : need a 32-bit type"
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
/*! XXH32() :
|
|
Calculate the 32-bit hash of sequence "length" bytes stored at memory address "input".
|
|
The memory between input & input+length must be valid (allocated and read-accessible).
|
|
"seed" can be used to alter the result predictably.
|
|
Speed on Core 2 Duo @ 3 GHz (single thread, SMHasher benchmark) : 5.4 GB/s */
|
|
XXH_PUBLIC_API XXH32_hash_t XXH32 (const void* input, size_t length, XXH32_hash_t seed);
|
|
|
|
/*====== Streaming ======*/
|
|
|
|
/*
|
|
* Streaming functions generate the xxHash value from an incrememtal input.
|
|
* This method is slower than single-call functions, due to state management.
|
|
* For small inputs, prefer `XXH32()` and `XXH64()`, which are better optimized.
|
|
*
|
|
* XXH state must first be allocated, using XXH*_createState() .
|
|
*
|
|
* Start a new hash by initializing state with a seed, using XXH*_reset().
|
|
*
|
|
* Then, feed the hash state by calling XXH*_update() as many times as necessary.
|
|
* The function returns an error code, with 0 meaning OK, and any other value meaning there is an error.
|
|
*
|
|
* Finally, a hash value can be produced anytime, by using XXH*_digest().
|
|
* This function returns the nn-bits hash as an int or long long.
|
|
*
|
|
* It's still possible to continue inserting input into the hash state after a digest,
|
|
* and generate some new hash values later on, by invoking again XXH*_digest().
|
|
*
|
|
* When done, release the state, using XXH*_freeState().
|
|
*/
|
|
|
|
typedef struct XXH32_state_s XXH32_state_t; /* incomplete type */
|
|
XXH_PUBLIC_API XXH32_state_t* XXH32_createState(void);
|
|
XXH_PUBLIC_API XXH_errorcode XXH32_freeState(XXH32_state_t* statePtr);
|
|
XXH_PUBLIC_API void XXH32_copyState(XXH32_state_t* dst_state, const XXH32_state_t* src_state);
|
|
|
|
XXH_PUBLIC_API XXH_errorcode XXH32_reset (XXH32_state_t* statePtr, XXH32_hash_t seed);
|
|
XXH_PUBLIC_API XXH_errorcode XXH32_update (XXH32_state_t* statePtr, const void* input, size_t length);
|
|
XXH_PUBLIC_API XXH32_hash_t XXH32_digest (const XXH32_state_t* statePtr);
|
|
|
|
/*====== Canonical representation ======*/
|
|
|
|
/* Default return values from XXH functions are basic unsigned 32 and 64 bits.
|
|
* This the simplest and fastest format for further post-processing.
|
|
* However, this leaves open the question of what is the order of bytes,
|
|
* since little and big endian conventions will write the same number differently.
|
|
*
|
|
* The canonical representation settles this issue,
|
|
* by mandating big-endian convention,
|
|
* aka, the same convention as human-readable numbers (large digits first).
|
|
* When writing hash values to storage, sending them over a network, or printing them,
|
|
* it's highly recommended to use the canonical representation,
|
|
* to ensure portability across a wider range of systems, present and future.
|
|
*
|
|
* The following functions allow transformation of hash values into and from canonical format.
|
|
*/
|
|
|
|
typedef struct { unsigned char digest[4]; } XXH32_canonical_t;
|
|
XXH_PUBLIC_API void XXH32_canonicalFromHash(XXH32_canonical_t* dst, XXH32_hash_t hash);
|
|
XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical(const XXH32_canonical_t* src);
|
|
|
|
|
|
#ifndef XXH_NO_LONG_LONG
|
|
/*-**********************************************************************
|
|
* 64-bit hash
|
|
************************************************************************/
|
|
#if !defined (__VMS) \
|
|
&& (defined (__cplusplus) \
|
|
|| (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
|
|
# include <stdint.h>
|
|
typedef uint64_t XXH64_hash_t;
|
|
#else
|
|
/* the following type must have a width of 64-bit */
|
|
typedef unsigned long long XXH64_hash_t;
|
|
#endif
|
|
|
|
/*! XXH64() :
|
|
Calculate the 64-bit hash of sequence of length "len" stored at memory address "input".
|
|
"seed" can be used to alter the result predictably.
|
|
This function runs faster on 64-bit systems, but slower on 32-bit systems (see benchmark).
|
|
*/
|
|
XXH_PUBLIC_API XXH64_hash_t XXH64 (const void* input, size_t length, XXH64_hash_t seed);
|
|
|
|
/*====== Streaming ======*/
|
|
typedef struct XXH64_state_s XXH64_state_t; /* incomplete type */
|
|
XXH_PUBLIC_API XXH64_state_t* XXH64_createState(void);
|
|
XXH_PUBLIC_API XXH_errorcode XXH64_freeState(XXH64_state_t* statePtr);
|
|
XXH_PUBLIC_API void XXH64_copyState(XXH64_state_t* dst_state, const XXH64_state_t* src_state);
|
|
|
|
XXH_PUBLIC_API XXH_errorcode XXH64_reset (XXH64_state_t* statePtr, XXH64_hash_t seed);
|
|
XXH_PUBLIC_API XXH_errorcode XXH64_update (XXH64_state_t* statePtr, const void* input, size_t length);
|
|
XXH_PUBLIC_API XXH64_hash_t XXH64_digest (const XXH64_state_t* statePtr);
|
|
|
|
/*====== Canonical representation ======*/
|
|
typedef struct { unsigned char digest[8]; } XXH64_canonical_t;
|
|
XXH_PUBLIC_API void XXH64_canonicalFromHash(XXH64_canonical_t* dst, XXH64_hash_t hash);
|
|
XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical(const XXH64_canonical_t* src);
|
|
|
|
|
|
#endif /* XXH_NO_LONG_LONG */
|
|
|
|
|
|
|
|
#ifdef XXH_STATIC_LINKING_ONLY
|
|
|
|
/* ================================================================================================
|
|
This section contains declarations which are not guaranteed to remain stable.
|
|
They may change in future versions, becoming incompatible with a different version of the library.
|
|
These declarations should only be used with static linking.
|
|
Never use them in association with dynamic linking !
|
|
=================================================================================================== */
|
|
|
|
/* These definitions are only present to allow
|
|
* static allocation of XXH state, on stack or in a struct for example.
|
|
* Never **ever** use members directly. */
|
|
|
|
struct XXH32_state_s {
|
|
XXH32_hash_t total_len_32;
|
|
XXH32_hash_t large_len;
|
|
XXH32_hash_t v1;
|
|
XXH32_hash_t v2;
|
|
XXH32_hash_t v3;
|
|
XXH32_hash_t v4;
|
|
XXH32_hash_t mem32[4];
|
|
XXH32_hash_t memsize;
|
|
XXH32_hash_t reserved; /* never read nor write, might be removed in a future version */
|
|
}; /* typedef'd to XXH32_state_t */
|
|
|
|
#ifndef XXH_NO_LONG_LONG /* remove 64-bit support */
|
|
struct XXH64_state_s {
|
|
XXH64_hash_t total_len;
|
|
XXH64_hash_t v1;
|
|
XXH64_hash_t v2;
|
|
XXH64_hash_t v3;
|
|
XXH64_hash_t v4;
|
|
XXH64_hash_t mem64[4];
|
|
XXH32_hash_t memsize;
|
|
XXH32_hash_t reserved32; /* required for padding anyway */
|
|
XXH64_hash_t reserved64; /* never read nor write, might be removed in a future version */
|
|
}; /* typedef'd to XXH64_state_t */
|
|
#endif /* XXH_NO_LONG_LONG */
|
|
|
|
|
|
/*-**********************************************************************
|
|
* XXH3
|
|
* New experimental hash
|
|
************************************************************************/
|
|
#ifndef XXH_NO_LONG_LONG
|
|
|
|
|
|
/* ============================================
|
|
* XXH3 is a new hash algorithm,
|
|
* featuring improved speed performance for both small and large inputs.
|
|
* See full speed analysis at : http://fastcompression.blogspot.com/2019/03/presenting-xxh3.html
|
|
* In general, expect XXH3 to run about ~2x faster on large inputs,
|
|
* and >3x faster on small ones, though exact differences depend on platform.
|
|
*
|
|
* The algorithm is portable, will generate the same hash on all platforms.
|
|
* It benefits greatly from vectorization units, but does not require it.
|
|
*
|
|
* XXH3 offers 2 variants, _64bits and _128bits.
|
|
* When only 64 bits are needed, prefer calling the _64bits variant :
|
|
* it reduces the amount of mixing, resulting in faster speed on small inputs.
|
|
* It's also generally simpler to manipulate a scalar return type than a struct.
|
|
*
|
|
* The XXH3 algorithm is still considered experimental.
|
|
* Produced results can still change between versions.
|
|
* Results produced by v0.7.x are not comparable with results from v0.7.y .
|
|
* It's nonetheless possible to use XXH3 for ephemeral data (local sessions),
|
|
* but avoid storing values in long-term storage for later reads.
|
|
*
|
|
* The API supports one-shot hashing, streaming mode, and custom secrets.
|
|
*
|
|
* There are still a number of opened questions that community can influence during the experimental period.
|
|
* I'm trying to list a few of them below, though don't consider this list as complete.
|
|
*
|
|
* - 128-bits output type : currently defined as a structure of two 64-bits fields.
|
|
* That's because 128-bit values do not exist in C standard.
|
|
* Note that it means that, at byte level, result is not identical depending on endianess.
|
|
* However, at field level, they are identical on all platforms.
|
|
* The canonical representation solves the issue of identical byte-level representation across platforms,
|
|
* which is necessary for serialization.
|
|
* Q1 : Would there be a better representation for a 128-bit hash result ?
|
|
* Q2 : Are the names of the inner 64-bit fields important ? Should they be changed ?
|
|
*
|
|
* - Prototype XXH128() : XXH128() uses the same arguments as XXH64(), for consistency.
|
|
* It means it maps to XXH3_128bits_withSeed().
|
|
* This variant is slightly slower than XXH3_128bits(),
|
|
* because the seed is now part of the algorithm, and can't be simplified.
|
|
* Is that a good idea ?
|
|
*
|
|
* - Seed type for XXH128() : currently, it's a single 64-bit value, like the 64-bit variant.
|
|
* It could be argued that it's more logical to offer a 128-bit seed input parameter for a 128-bit hash.
|
|
* But 128-bit seed is more difficult to use, since it requires to pass a structure instead of a scalar value.
|
|
* Such a variant could either replace current one, or become an additional one.
|
|
* Farmhash, for example, offers both variants (the 128-bits seed variant is called `doubleSeed`).
|
|
* Follow up question : if both 64-bit and 128-bit seeds are allowed, which variant should be called XXH128 ?
|
|
*
|
|
* - Result for len==0 : Currently, the result of hashing a zero-length input is always `0`.
|
|
* It seems okay as a return value when using "default" secret and seed.
|
|
* But is it still fine to return `0` when secret or seed are non-default ?
|
|
* Are there use cases which could depend on generating a different hash result for zero-length input when the secret is different ?
|
|
*
|
|
* - Consistency (1) : Streaming XXH128 uses an XXH3 state, which is the same state as XXH3_64bits().
|
|
* It means a 128bit streaming loop must invoke the following symbols :
|
|
* XXH3_createState(), XXH3_128bits_reset(), XXH3_128bits_update() (loop), XXH3_128bits_digest(), XXH3_freeState().
|
|
* Is that consistent enough ?
|
|
*
|
|
* - Consistency (2) : The canonical representation of `XXH3_64bits` is provided by existing functions
|
|
* XXH64_canonicalFromHash(), and reverse operation XXH64_hashFromCanonical().
|
|
* As a mirror, canonical functions for XXH128_hash_t results generated by `XXH3_128bits`
|
|
* are XXH128_canonicalFromHash() and XXH128_hashFromCanonical().
|
|
* Which means, `XXH3` doesn't appear in the names, because canonical functions operate on a type,
|
|
* independently of which algorithm was used to generate that type.
|
|
* Is that consistent enough ?
|
|
*/
|
|
|
|
#ifdef XXH_NAMESPACE
|
|
# define XXH3_64bits XXH_NAME2(XXH_NAMESPACE, XXH3_64bits)
|
|
# define XXH3_64bits_withSecret XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_withSecret)
|
|
# define XXH3_64bits_withSeed XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_withSeed)
|
|
|
|
# define XXH3_createState XXH_NAME2(XXH_NAMESPACE, XXH3_createState)
|
|
# define XXH3_freeState XXH_NAME2(XXH_NAMESPACE, XXH3_freeState)
|
|
# define XXH3_copyState XXH_NAME2(XXH_NAMESPACE, XXH3_copyState)
|
|
|
|
# define XXH3_64bits_reset XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_reset)
|
|
# define XXH3_64bits_reset_withSeed XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_reset_withSeed)
|
|
# define XXH3_64bits_reset_withSecret XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_reset_withSecret)
|
|
# define XXH3_64bits_update XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_update)
|
|
# define XXH3_64bits_digest XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_digest)
|
|
#endif
|
|
|
|
/* XXH3_64bits() :
|
|
* default 64-bit variant, using default secret and default seed of 0.
|
|
* It's the fastest variant. */
|
|
XXH_PUBLIC_API XXH64_hash_t XXH3_64bits(const void* data, size_t len);
|
|
|
|
/* XXH3_64bits_withSecret() :
|
|
* It's possible to provide any blob of bytes as a "secret" to generate the hash.
|
|
* This makes it more difficult for an external actor to prepare an intentional collision.
|
|
* The secret *must* be large enough (>= XXH3_SECRET_SIZE_MIN).
|
|
* It should consist of random bytes.
|
|
* Avoid repeating same character, or sequences of bytes,
|
|
* and especially avoid swathes of \0.
|
|
* Failure to respect these conditions will result in a poor quality hash.
|
|
*/
|
|
#define XXH3_SECRET_SIZE_MIN 136
|
|
XXH_PUBLIC_API XXH64_hash_t XXH3_64bits_withSecret(const void* data, size_t len, const void* secret, size_t secretSize);
|
|
|
|
/* XXH3_64bits_withSeed() :
|
|
* This variant generates on the fly a custom secret,
|
|
* based on the default secret, altered using the `seed` value.
|
|
* While this operation is decently fast, note that it's not completely free.
|
|
* note : seed==0 produces same results as XXH3_64bits() */
|
|
XXH_PUBLIC_API XXH64_hash_t XXH3_64bits_withSeed(const void* data, size_t len, XXH64_hash_t seed);
|
|
|
|
|
|
/* streaming 64-bit */
|
|
|
|
#if defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) /* C11+ */
|
|
# include <stdalign.h>
|
|
# define XXH_ALIGN(n) alignas(n)
|
|
#elif defined(__GNUC__)
|
|
# define XXH_ALIGN(n) __attribute__ ((aligned(n)))
|
|
#elif defined(_MSC_VER)
|
|
# define XXH_ALIGN(n) __declspec(align(n))
|
|
#else
|
|
# define XXH_ALIGN(n) /* disabled */
|
|
#endif
|
|
|
|
typedef struct XXH3_state_s XXH3_state_t;
|
|
|
|
#define XXH3_SECRET_DEFAULT_SIZE 192 /* minimum XXH3_SECRET_SIZE_MIN */
|
|
#define XXH3_INTERNALBUFFER_SIZE 256
|
|
struct XXH3_state_s {
|
|
XXH_ALIGN(64) XXH64_hash_t acc[8];
|
|
XXH_ALIGN(64) unsigned char customSecret[XXH3_SECRET_DEFAULT_SIZE]; /* used to store a custom secret generated from the seed. Makes state larger. Design might change */
|
|
XXH_ALIGN(64) unsigned char buffer[XXH3_INTERNALBUFFER_SIZE];
|
|
XXH32_hash_t bufferedSize;
|
|
XXH32_hash_t nbStripesPerBlock;
|
|
XXH32_hash_t nbStripesSoFar;
|
|
XXH32_hash_t secretLimit;
|
|
XXH32_hash_t reserved32;
|
|
XXH32_hash_t reserved32_2;
|
|
XXH64_hash_t totalLen;
|
|
XXH64_hash_t seed;
|
|
XXH64_hash_t reserved64;
|
|
const unsigned char* secret; /* note : there is some padding after, due to alignment on 64 bytes */
|
|
}; /* typedef'd to XXH3_state_t */
|
|
|
|
/* Streaming requires state maintenance.
|
|
* This operation costs memory and cpu.
|
|
* As a consequence, streaming is slower than one-shot hashing.
|
|
* For better performance, prefer using one-shot functions whenever possible. */
|
|
|
|
XXH_PUBLIC_API XXH3_state_t* XXH3_createState(void);
|
|
XXH_PUBLIC_API XXH_errorcode XXH3_freeState(XXH3_state_t* statePtr);
|
|
XXH_PUBLIC_API void XXH3_copyState(XXH3_state_t* dst_state, const XXH3_state_t* src_state);
|
|
|
|
|
|
/* XXH3_64bits_reset() :
|
|
* initialize with default parameters.
|
|
* result will be equivalent to `XXH3_64bits()`. */
|
|
XXH_PUBLIC_API XXH_errorcode XXH3_64bits_reset(XXH3_state_t* statePtr);
|
|
/* XXH3_64bits_reset_withSeed() :
|
|
* generate a custom secret from `seed`, and store it into state.
|
|
* digest will be equivalent to `XXH3_64bits_withSeed()`. */
|
|
XXH_PUBLIC_API XXH_errorcode XXH3_64bits_reset_withSeed(XXH3_state_t* statePtr, XXH64_hash_t seed);
|
|
/* XXH3_64bits_reset_withSecret() :
|
|
* `secret` is referenced, and must outlive the hash streaming session.
|
|
* secretSize must be >= XXH3_SECRET_SIZE_MIN.
|
|
*/
|
|
XXH_PUBLIC_API XXH_errorcode XXH3_64bits_reset_withSecret(XXH3_state_t* statePtr, const void* secret, size_t secretSize);
|
|
|
|
XXH_PUBLIC_API XXH_errorcode XXH3_64bits_update (XXH3_state_t* statePtr, const void* input, size_t length);
|
|
XXH_PUBLIC_API XXH64_hash_t XXH3_64bits_digest (const XXH3_state_t* statePtr);
|
|
|
|
|
|
/* 128-bit */
|
|
|
|
#ifdef XXH_NAMESPACE
|
|
# define XXH128 XXH_NAME2(XXH_NAMESPACE, XXH128)
|
|
# define XXH3_128bits XXH_NAME2(XXH_NAMESPACE, XXH3_128bits)
|
|
# define XXH3_128bits_withSeed XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_withSeed)
|
|
# define XXH3_128bits_withSecret XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_withSecret)
|
|
|
|
# define XXH3_128bits_reset XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_reset)
|
|
# define XXH3_128bits_reset_withSeed XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_reset_withSeed)
|
|
# define XXH3_128bits_reset_withSecret XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_reset_withSecret)
|
|
# define XXH3_128bits_update XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_update)
|
|
# define XXH3_128bits_digest XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_digest)
|
|
|
|
# define XXH128_isEqual XXH_NAME2(XXH_NAMESPACE, XXH128_isEqual)
|
|
# define XXH128_cmp XXH_NAME2(XXH_NAMESPACE, XXH128_cmp)
|
|
# define XXH128_canonicalFromHash XXH_NAME2(XXH_NAMESPACE, XXH128_canonicalFromHash)
|
|
# define XXH128_hashFromCanonical XXH_NAME2(XXH_NAMESPACE, XXH128_hashFromCanonical)
|
|
#endif
|
|
|
|
typedef struct {
|
|
XXH64_hash_t low64;
|
|
XXH64_hash_t high64;
|
|
} XXH128_hash_t;
|
|
|
|
XXH_PUBLIC_API XXH128_hash_t XXH128(const void* data, size_t len, XXH64_hash_t seed);
|
|
XXH_PUBLIC_API XXH128_hash_t XXH3_128bits(const void* data, size_t len);
|
|
XXH_PUBLIC_API XXH128_hash_t XXH3_128bits_withSeed(const void* data, size_t len, XXH64_hash_t seed); /* == XXH128() */
|
|
XXH_PUBLIC_API XXH128_hash_t XXH3_128bits_withSecret(const void* data, size_t len, const void* secret, size_t secretSize);
|
|
|
|
XXH_PUBLIC_API XXH_errorcode XXH3_128bits_reset(XXH3_state_t* statePtr);
|
|
XXH_PUBLIC_API XXH_errorcode XXH3_128bits_reset_withSeed(XXH3_state_t* statePtr, XXH64_hash_t seed);
|
|
XXH_PUBLIC_API XXH_errorcode XXH3_128bits_reset_withSecret(XXH3_state_t* statePtr, const void* secret, size_t secretSize);
|
|
|
|
XXH_PUBLIC_API XXH_errorcode XXH3_128bits_update (XXH3_state_t* statePtr, const void* input, size_t length);
|
|
XXH_PUBLIC_API XXH128_hash_t XXH3_128bits_digest (const XXH3_state_t* statePtr);
|
|
|
|
|
|
/* Note : for better performance, following functions can be inlined,
|
|
* using XXH_INLINE_ALL */
|
|
|
|
/* return : 1 is equal, 0 if different */
|
|
XXH_PUBLIC_API int XXH128_isEqual(XXH128_hash_t h1, XXH128_hash_t h2);
|
|
|
|
/* This comparator is compatible with stdlib's qsort().
|
|
* return : >0 if *h128_1 > *h128_2
|
|
* <0 if *h128_1 < *h128_2
|
|
* =0 if *h128_1 == *h128_2 */
|
|
XXH_PUBLIC_API int XXH128_cmp(const void* h128_1, const void* h128_2);
|
|
|
|
|
|
/*====== Canonical representation ======*/
|
|
typedef struct { unsigned char digest[16]; } XXH128_canonical_t;
|
|
XXH_PUBLIC_API void XXH128_canonicalFromHash(XXH128_canonical_t* dst, XXH128_hash_t hash);
|
|
XXH_PUBLIC_API XXH128_hash_t XXH128_hashFromCanonical(const XXH128_canonical_t* src);
|
|
|
|
|
|
#endif /* XXH_NO_LONG_LONG */
|
|
|
|
|
|
/*-**********************************************************************
|
|
* XXH_INLINE_ALL
|
|
************************************************************************/
|
|
#if defined(XXH_INLINE_ALL) || defined(XXH_PRIVATE_API)
|
|
# include "xxhash.c" /* include xxhash function bodies as `static`, for inlining */
|
|
#endif
|
|
|
|
|
|
|
|
#endif /* XXH_STATIC_LINKING_ONLY */
|
|
|
|
|
|
#if defined (__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* XXHASH_H_5627135585666179 */
|