+++ /dev/null
-/*
- * xxHash - Extremely Fast Hash algorithm
- * Header File
- * Copyright (C) 2012-2021 Yann Collet
- *
- * BSD 2-Clause License (https://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 homepage: https://www.xxhash.com
- * - xxHash source repository: https://github.com/Cyan4973/xxHash
- */
-
-/*!
- * @mainpage xxHash
- *
- * xxHash is an extremely fast non-cryptographic hash algorithm, working at RAM speed
- * limits.
- *
- * It is proposed in four flavors, in three families:
- * 1. @ref XXH32_family
- * - Classic 32-bit hash function. Simple, compact, and runs on almost all
- * 32-bit and 64-bit systems.
- * 2. @ref XXH64_family
- * - Classic 64-bit adaptation of XXH32. Just as simple, and runs well on most
- * 64-bit systems (but _not_ 32-bit systems).
- * 3. @ref XXH3_family
- * - Modern 64-bit and 128-bit hash function family which features improved
- * strength and performance across the board, especially on smaller data.
- * It benefits greatly from SIMD and 64-bit without requiring it.
- *
- * Benchmarks
- * ---
- * The reference system uses an Intel i7-9700K CPU, and runs Ubuntu x64 20.04.
- * The open source benchmark program is compiled with clang v10.0 using -O3 flag.
- *
- * | Hash Name | ISA ext | Width | Large Data Speed | Small Data Velocity |
- * | -------------------- | ------- | ----: | ---------------: | ------------------: |
- * | XXH3_64bits() | @b AVX2 | 64 | 59.4 GB/s | 133.1 |
- * | MeowHash | AES-NI | 128 | 58.2 GB/s | 52.5 |
- * | XXH3_128bits() | @b AVX2 | 128 | 57.9 GB/s | 118.1 |
- * | CLHash | PCLMUL | 64 | 37.1 GB/s | 58.1 |
- * | XXH3_64bits() | @b SSE2 | 64 | 31.5 GB/s | 133.1 |
- * | XXH3_128bits() | @b SSE2 | 128 | 29.6 GB/s | 118.1 |
- * | RAM sequential read | | N/A | 28.0 GB/s | N/A |
- * | ahash | AES-NI | 64 | 22.5 GB/s | 107.2 |
- * | City64 | | 64 | 22.0 GB/s | 76.6 |
- * | T1ha2 | | 64 | 22.0 GB/s | 99.0 |
- * | City128 | | 128 | 21.7 GB/s | 57.7 |
- * | FarmHash | AES-NI | 64 | 21.3 GB/s | 71.9 |
- * | XXH64() | | 64 | 19.4 GB/s | 71.0 |
- * | SpookyHash | | 64 | 19.3 GB/s | 53.2 |
- * | Mum | | 64 | 18.0 GB/s | 67.0 |
- * | CRC32C | SSE4.2 | 32 | 13.0 GB/s | 57.9 |
- * | XXH32() | | 32 | 9.7 GB/s | 71.9 |
- * | City32 | | 32 | 9.1 GB/s | 66.0 |
- * | Blake3* | @b AVX2 | 256 | 4.4 GB/s | 8.1 |
- * | Murmur3 | | 32 | 3.9 GB/s | 56.1 |
- * | SipHash* | | 64 | 3.0 GB/s | 43.2 |
- * | Blake3* | @b SSE2 | 256 | 2.4 GB/s | 8.1 |
- * | HighwayHash | | 64 | 1.4 GB/s | 6.0 |
- * | FNV64 | | 64 | 1.2 GB/s | 62.7 |
- * | Blake2* | | 256 | 1.1 GB/s | 5.1 |
- * | SHA1* | | 160 | 0.8 GB/s | 5.6 |
- * | MD5* | | 128 | 0.6 GB/s | 7.8 |
- * @note
- * - Hashes which require a specific ISA extension are noted. SSE2 is also noted,
- * even though it is mandatory on x64.
- * - Hashes with an asterisk are cryptographic. Note that MD5 is non-cryptographic
- * by modern standards.
- * - Small data velocity is a rough average of algorithm's efficiency for small
- * data. For more accurate information, see the wiki.
- * - More benchmarks and strength tests are found on the wiki:
- * https://github.com/Cyan4973/xxHash/wiki
- *
- * Usage
- * ------
- * All xxHash variants use a similar API. Changing the algorithm is a trivial
- * substitution.
- *
- * @pre
- * For functions which take an input and length parameter, the following
- * requirements are assumed:
- * - The range from [`input`, `input + length`) is valid, readable memory.
- * - The only exception is if the `length` is `0`, `input` may be `NULL`.
- * - For C++, the objects must have the *TriviallyCopyable* property, as the
- * functions access bytes directly as if it was an array of `unsigned char`.
- *
- * @anchor single_shot_example
- * **Single Shot**
- *
- * These functions are stateless functions which hash a contiguous block of memory,
- * immediately returning the result. They are the easiest and usually the fastest
- * option.
- *
- * XXH32(), XXH64(), XXH3_64bits(), XXH3_128bits()
- *
- * @code{.c}
- * #include <string.h>
- * #include "xxhash.h"
- *
- * // Example for a function which hashes a null terminated string with XXH32().
- * XXH32_hash_t hash_string(const char* string, XXH32_hash_t seed)
- * {
- * // NULL pointers are only valid if the length is zero
- * size_t length = (string == NULL) ? 0 : strlen(string);
- * return XXH32(string, length, seed);
- * }
- * @endcode
- *
- * @anchor streaming_example
- * **Streaming**
- *
- * These groups of functions allow incremental hashing of unknown size, even
- * more than what would fit in a size_t.
- *
- * XXH32_reset(), XXH64_reset(), XXH3_64bits_reset(), XXH3_128bits_reset()
- *
- * @code{.c}
- * #include <stdio.h>
- * #include <assert.h>
- * #include "xxhash.h"
- * // Example for a function which hashes a FILE incrementally with XXH3_64bits().
- * XXH64_hash_t hashFile(FILE* f)
- * {
- * // Allocate a state struct. Do not just use malloc() or new.
- * XXH3_state_t* state = XXH3_createState();
- * assert(state != NULL && "Out of memory!");
- * // Reset the state to start a new hashing session.
- * XXH3_64bits_reset(state);
- * char buffer[4096];
- * size_t count;
- * // Read the file in chunks
- * while ((count = fread(buffer, 1, sizeof(buffer), f)) != 0) {
- * // Run update() as many times as necessary to process the data
- * XXH3_64bits_update(state, buffer, count);
- * }
- * // Retrieve the finalized hash. This will not change the state.
- * XXH64_hash_t result = XXH3_64bits_digest(state);
- * // Free the state. Do not use free().
- * XXH3_freeState(state);
- * return result;
- * }
- * @endcode
- *
- * @file xxhash.h
- * xxHash prototypes and implementation
- */
-
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-/* ****************************
- * INLINE mode
- ******************************/
-/*!
- * @defgroup public Public API
- * Contains details on the public xxHash functions.
- * @{
- */
-#ifdef XXH_DOXYGEN
-/*!
- * @brief Gives access to internal state declaration, required for static allocation.
- *
- * Incompatible with dynamic linking, due to risks of ABI changes.
- *
- * Usage:
- * @code{.c}
- * #define XXH_STATIC_LINKING_ONLY
- * #include "xxhash.h"
- * @endcode
- */
-# define XXH_STATIC_LINKING_ONLY
-/* Do not undef XXH_STATIC_LINKING_ONLY for Doxygen */
-
-/*!
- * @brief Gives access to internal definitions.
- *
- * Usage:
- * @code{.c}
- * #define XXH_STATIC_LINKING_ONLY
- * #define XXH_IMPLEMENTATION
- * #include "xxhash.h"
- * @endcode
- */
-# define XXH_IMPLEMENTATION
-/* Do not undef XXH_IMPLEMENTATION for Doxygen */
-
-/*!
- * @brief Exposes the implementation and marks all functions as `inline`.
- *
- * Use these build macros to inline xxhash into the target unit.
- * Inlining improves performance on small inputs, especially when the length is
- * expressed as a compile-time constant:
- *
- * https://fastcompression.blogspot.com/2018/03/xxhash-for-small-keys-impressive-power.html
- *
- * It also keeps xxHash symbols private to the unit, so they are not exported.
- *
- * Usage:
- * @code{.c}
- * #define XXH_INLINE_ALL
- * #include "xxhash.h"
- * @endcode
- * Do not compile and link xxhash.o as a separate object, as it is not useful.
- */
-# define XXH_INLINE_ALL
-# undef XXH_INLINE_ALL
-/*!
- * @brief Exposes the implementation without marking functions as inline.
- */
-# define XXH_PRIVATE_API
-# undef XXH_PRIVATE_API
-/*!
- * @brief Emulate a namespace by transparently prefixing all symbols.
- *
- * 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 @ref XXH_NAMESPACE to automatically prefix
- * any public symbol from xxhash library with the value of @ref XXH_NAMESPACE
- * (therefore, avoid empty or numeric values).
- *
- * Note that no change is required within the calling program as long as it
- * includes `xxhash.h`: Regular symbol names will be automatically translated
- * by this header.
- */
-# define XXH_NAMESPACE /* YOUR NAME HERE */
-# undef XXH_NAMESPACE
-#endif
-
-#if (defined(XXH_INLINE_ALL) || defined(XXH_PRIVATE_API)) \
- && !defined(XXH_INLINE_ALL_31684351384)
- /* this section should be traversed only once */
-# define XXH_INLINE_ALL_31684351384
- /* give access to the advanced API, required to compile implementations */
-# undef XXH_STATIC_LINKING_ONLY /* avoid macro redef */
-# define XXH_STATIC_LINKING_ONLY
- /* make all functions private */
-# undef XXH_PUBLIC_API
-# 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
- /* note: this version may generate warnings for unused static functions */
-# define XXH_PUBLIC_API static
-# endif
-
- /*
- * This part deals with the special case where a unit wants to inline xxHash,
- * but "xxhash.h" has previously been included without XXH_INLINE_ALL,
- * such as part of some previously included *.h header file.
- * Without further action, the new include would just be ignored,
- * and functions would effectively _not_ be inlined (silent failure).
- * The following macros solve this situation by prefixing all inlined names,
- * avoiding naming collision with previous inclusions.
- */
- /* Before that, we unconditionally #undef all symbols,
- * in case they were already defined with XXH_NAMESPACE.
- * They will then be redefined for XXH_INLINE_ALL
- */
-# undef XXH_versionNumber
- /* XXH32 */
-# undef XXH32
-# undef XXH32_createState
-# undef XXH32_freeState
-# undef XXH32_reset
-# undef XXH32_update
-# undef XXH32_digest
-# undef XXH32_copyState
-# undef XXH32_canonicalFromHash
-# undef XXH32_hashFromCanonical
- /* XXH64 */
-# undef XXH64
-# undef XXH64_createState
-# undef XXH64_freeState
-# undef XXH64_reset
-# undef XXH64_update
-# undef XXH64_digest
-# undef XXH64_copyState
-# undef XXH64_canonicalFromHash
-# undef XXH64_hashFromCanonical
- /* XXH3_64bits */
-# undef XXH3_64bits
-# undef XXH3_64bits_withSecret
-# undef XXH3_64bits_withSeed
-# undef XXH3_64bits_withSecretandSeed
-# undef XXH3_createState
-# undef XXH3_freeState
-# undef XXH3_copyState
-# undef XXH3_64bits_reset
-# undef XXH3_64bits_reset_withSeed
-# undef XXH3_64bits_reset_withSecret
-# undef XXH3_64bits_update
-# undef XXH3_64bits_digest
-# undef XXH3_generateSecret
- /* XXH3_128bits */
-# undef XXH128
-# undef XXH3_128bits
-# undef XXH3_128bits_withSeed
-# undef XXH3_128bits_withSecret
-# undef XXH3_128bits_reset
-# undef XXH3_128bits_reset_withSeed
-# undef XXH3_128bits_reset_withSecret
-# undef XXH3_128bits_reset_withSecretandSeed
-# undef XXH3_128bits_update
-# undef XXH3_128bits_digest
-# undef XXH128_isEqual
-# undef XXH128_cmp
-# undef XXH128_canonicalFromHash
-# undef XXH128_hashFromCanonical
- /* Finally, free the namespace itself */
-# undef XXH_NAMESPACE
-
- /* employ the namespace for XXH_INLINE_ALL */
-# define XXH_NAMESPACE XXH_INLINE_
- /*
- * Some identifiers (enums, type names) are not symbols,
- * but they must nonetheless be renamed to avoid redeclaration.
- * Alternative solution: do not redeclare them.
- * However, this requires some #ifdefs, and has a more dispersed impact.
- * Meanwhile, renaming can be achieved in a single place.
- */
-# define XXH_IPREF(Id) XXH_NAMESPACE ## Id
-# define XXH_OK XXH_IPREF(XXH_OK)
-# define XXH_ERROR XXH_IPREF(XXH_ERROR)
-# define XXH_errorcode XXH_IPREF(XXH_errorcode)
-# define XXH32_canonical_t XXH_IPREF(XXH32_canonical_t)
-# define XXH64_canonical_t XXH_IPREF(XXH64_canonical_t)
-# define XXH128_canonical_t XXH_IPREF(XXH128_canonical_t)
-# define XXH32_state_s XXH_IPREF(XXH32_state_s)
-# define XXH32_state_t XXH_IPREF(XXH32_state_t)
-# define XXH64_state_s XXH_IPREF(XXH64_state_s)
-# define XXH64_state_t XXH_IPREF(XXH64_state_t)
-# define XXH3_state_s XXH_IPREF(XXH3_state_s)
-# define XXH3_state_t XXH_IPREF(XXH3_state_t)
-# define XXH128_hash_t XXH_IPREF(XXH128_hash_t)
- /* Ensure the header is parsed again, even if it was previously included */
-# undef XXHASH_H_5627135585666179
-# undef XXHASH_H_STATIC_13879238742
-#endif /* XXH_INLINE_ALL || XXH_PRIVATE_API */
-
-/* ****************************************************************
- * Stable API
- *****************************************************************/
-#ifndef XXHASH_H_5627135585666179
-#define XXHASH_H_5627135585666179 1
-
-/*! @brief Marks a global symbol. */
-#if !defined(XXH_INLINE_ALL) && !defined(XXH_PRIVATE_API)
-# 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
-
-#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)
-/* XXH32 */
-# 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)
-/* XXH64 */
-# 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)
-/* XXH3_64bits */
-# 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_64bits_withSecretandSeed XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_withSecretandSeed)
-# 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_reset_withSecretandSeed XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_reset_withSecretandSeed)
-# define XXH3_64bits_update XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_update)
-# define XXH3_64bits_digest XXH_NAME2(XXH_NAMESPACE, XXH3_64bits_digest)
-# define XXH3_generateSecret XXH_NAME2(XXH_NAMESPACE, XXH3_generateSecret)
-# define XXH3_generateSecret_fromSeed XXH_NAME2(XXH_NAMESPACE, XXH3_generateSecret_fromSeed)
-/* XXH3_128bits */
-# 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_withSecretandSeed XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_withSecretandSeed)
-# 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_reset_withSecretandSeed XXH_NAME2(XXH_NAMESPACE, XXH3_128bits_reset_withSecretandSeed)
-# 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
-
-
-/* *************************************
-* Compiler specifics
-***************************************/
-
-/* specific declaration modes for Windows */
-#if !defined(XXH_INLINE_ALL) && !defined(XXH_PRIVATE_API)
-# 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
-
-#if defined (__GNUC__)
-# define XXH_CONSTF __attribute__((const))
-# define XXH_PUREF __attribute__((pure))
-# define XXH_MALLOCF __attribute__((malloc))
-#else
-# define XXH_CONSTF /* disable */
-# define XXH_PUREF
-# define XXH_MALLOCF
-#endif
-
-/* *************************************
-* Version
-***************************************/
-#define XXH_VERSION_MAJOR 0
-#define XXH_VERSION_MINOR 8
-#define XXH_VERSION_RELEASE 2
-/*! @brief Version number, encoded as two digits each */
-#define XXH_VERSION_NUMBER (XXH_VERSION_MAJOR *100*100 + XXH_VERSION_MINOR *100 + XXH_VERSION_RELEASE)
-
-/*!
- * @brief Obtains the xxHash version.
- *
- * This is mostly useful when xxHash is compiled as a shared library,
- * since the returned value comes from the library, as opposed to header file.
- *
- * @return @ref XXH_VERSION_NUMBER of the invoked library.
- */
-XXH_PUBLIC_API XXH_CONSTF unsigned XXH_versionNumber (void);
-
-
-/* ****************************
-* Common basic types
-******************************/
-#include <stddef.h> /* size_t */
-/*!
- * @brief Exit code for the streaming API.
- */
-typedef enum {
- XXH_OK = 0, /*!< OK */
- XXH_ERROR /*!< Error */
-} XXH_errorcode;
-
-
-/*-**********************************************************************
-* 32-bit hash
-************************************************************************/
-#if defined(XXH_DOXYGEN) /* Don't show <stdint.h> include */
-/*!
- * @brief An unsigned 32-bit integer.
- *
- * Not necessarily defined to `uint32_t` but functionally equivalent.
- */
-typedef uint32_t XXH32_hash_t;
-
-#elif !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;
-# elif ULONG_MAX == 0xFFFFFFFFUL
- typedef unsigned long XXH32_hash_t;
-# else
-# error "unsupported platform: need a 32-bit type"
-# endif
-#endif
-
-/*!
- * @}
- *
- * @defgroup XXH32_family XXH32 family
- * @ingroup public
- * Contains functions used in the classic 32-bit xxHash algorithm.
- *
- * @note
- * XXH32 is useful for older platforms, with no or poor 64-bit performance.
- * Note that the @ref XXH3_family provides competitive speed for both 32-bit
- * and 64-bit systems, and offers true 64/128 bit hash results.
- *
- * @see @ref XXH64_family, @ref XXH3_family : Other xxHash families
- * @see @ref XXH32_impl for implementation details
- * @{
- */
-
-/*!
- * @brief Calculates the 32-bit hash of @p input using xxHash32.
- *
- * Speed on Core 2 Duo @ 3 GHz (single thread, SMHasher benchmark): 5.4 GB/s
- *
- * See @ref single_shot_example "Single Shot Example" for an example.
- *
- * @param input The block of data to be hashed, at least @p length bytes in size.
- * @param length The length of @p input, in bytes.
- * @param seed The 32-bit seed to alter the hash's output predictably.
- *
- * @pre
- * The memory between @p input and @p input + @p length must be valid,
- * readable, contiguous memory. However, if @p length is `0`, @p input may be
- * `NULL`. In C++, this also must be *TriviallyCopyable*.
- *
- * @return The calculated 32-bit hash value.
- *
- * @see
- * XXH64(), XXH3_64bits_withSeed(), XXH3_128bits_withSeed(), XXH128():
- * Direct equivalents for the other variants of xxHash.
- * @see
- * XXH32_createState(), XXH32_update(), XXH32_digest(): Streaming version.
- */
-XXH_PUBLIC_API XXH_PUREF XXH32_hash_t XXH32 (const void* input, size_t length, XXH32_hash_t seed);
-
-#ifndef XXH_NO_STREAM
-/*!
- * Streaming functions generate the xxHash value from an incremental input.
- * This method is slower than single-call functions, due to state management.
- * For small inputs, prefer `XXH32()` and `XXH64()`, which are better optimized.
- *
- * An XXH state must first be allocated using `XXH*_createState()`.
- *
- * Start a new hash by initializing the 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 new hash values later on by invoking `XXH*_digest()`.
- *
- * When done, release the state using `XXH*_freeState()`.
- *
- * @see streaming_example at the top of @ref xxhash.h for an example.
- */
-
-/*!
- * @typedef struct XXH32_state_s XXH32_state_t
- * @brief The opaque state struct for the XXH32 streaming API.
- *
- * @see XXH32_state_s for details.
- */
-typedef struct XXH32_state_s XXH32_state_t;
-
-/*!
- * @brief Allocates an @ref XXH32_state_t.
- *
- * Must be freed with XXH32_freeState().
- * @return An allocated XXH32_state_t on success, `NULL` on failure.
- */
-XXH_PUBLIC_API XXH_MALLOCF XXH32_state_t* XXH32_createState(void);
-/*!
- * @brief Frees an @ref XXH32_state_t.
- *
- * Must be allocated with XXH32_createState().
- * @param statePtr A pointer to an @ref XXH32_state_t allocated with @ref XXH32_createState().
- * @return XXH_OK.
- */
-XXH_PUBLIC_API XXH_errorcode XXH32_freeState(XXH32_state_t* statePtr);
-/*!
- * @brief Copies one @ref XXH32_state_t to another.
- *
- * @param dst_state The state to copy to.
- * @param src_state The state to copy from.
- * @pre
- * @p dst_state and @p src_state must not be `NULL` and must not overlap.
- */
-XXH_PUBLIC_API void XXH32_copyState(XXH32_state_t* dst_state, const XXH32_state_t* src_state);
-
-/*!
- * @brief Resets an @ref XXH32_state_t to begin a new hash.
- *
- * This function resets and seeds a state. Call it before @ref XXH32_update().
- *
- * @param statePtr The state struct to reset.
- * @param seed The 32-bit seed to alter the hash result predictably.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- *
- * @return @ref XXH_OK on success, @ref XXH_ERROR on failure.
- */
-XXH_PUBLIC_API XXH_errorcode XXH32_reset (XXH32_state_t* statePtr, XXH32_hash_t seed);
-
-/*!
- * @brief Consumes a block of @p input to an @ref XXH32_state_t.
- *
- * Call this to incrementally consume blocks of data.
- *
- * @param statePtr The state struct to update.
- * @param input The block of data to be hashed, at least @p length bytes in size.
- * @param length The length of @p input, in bytes.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- * @pre
- * The memory between @p input and @p input + @p length must be valid,
- * readable, contiguous memory. However, if @p length is `0`, @p input may be
- * `NULL`. In C++, this also must be *TriviallyCopyable*.
- *
- * @return @ref XXH_OK on success, @ref XXH_ERROR on failure.
- */
-XXH_PUBLIC_API XXH_errorcode XXH32_update (XXH32_state_t* statePtr, const void* input, size_t length);
-
-/*!
- * @brief Returns the calculated hash value from an @ref XXH32_state_t.
- *
- * @note
- * Calling XXH32_digest() will not affect @p statePtr, so you can update,
- * digest, and update again.
- *
- * @param statePtr The state struct to calculate the hash from.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- *
- * @return The calculated xxHash32 value from that state.
- */
-XXH_PUBLIC_API XXH_PUREF XXH32_hash_t XXH32_digest (const XXH32_state_t* statePtr);
-#endif /* !XXH_NO_STREAM */
-
-/******* Canonical representation *******/
-
-/*
- * The default return values from XXH functions are unsigned 32 and 64 bit
- * integers.
- * This the simplest and fastest format for further post-processing.
- *
- * However, this leaves open the question of what is the order on the byte level,
- * since little and big endian conventions will store the same number differently.
- *
- * The canonical representation settles this issue by mandating big-endian
- * convention, 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 to and from
- * canonical format.
- */
-
-/*!
- * @brief Canonical (big endian) representation of @ref XXH32_hash_t.
- */
-typedef struct {
- unsigned char digest[4]; /*!< Hash bytes, big endian */
-} XXH32_canonical_t;
-
-/*!
- * @brief Converts an @ref XXH32_hash_t to a big endian @ref XXH32_canonical_t.
- *
- * @param dst The @ref XXH32_canonical_t pointer to be stored to.
- * @param hash The @ref XXH32_hash_t to be converted.
- *
- * @pre
- * @p dst must not be `NULL`.
- */
-XXH_PUBLIC_API void XXH32_canonicalFromHash(XXH32_canonical_t* dst, XXH32_hash_t hash);
-
-/*!
- * @brief Converts an @ref XXH32_canonical_t to a native @ref XXH32_hash_t.
- *
- * @param src The @ref XXH32_canonical_t to convert.
- *
- * @pre
- * @p src must not be `NULL`.
- *
- * @return The converted hash.
- */
-XXH_PUBLIC_API XXH_PUREF XXH32_hash_t XXH32_hashFromCanonical(const XXH32_canonical_t* src);
-
-
-/*! @cond Doxygen ignores this part */
-#ifdef __has_attribute
-# define XXH_HAS_ATTRIBUTE(x) __has_attribute(x)
-#else
-# define XXH_HAS_ATTRIBUTE(x) 0
-#endif
-/*! @endcond */
-
-/*! @cond Doxygen ignores this part */
-/*
- * C23 __STDC_VERSION__ number hasn't been specified yet. For now
- * leave as `201711L` (C17 + 1).
- * TODO: Update to correct value when its been specified.
- */
-#define XXH_C23_VN 201711L
-/*! @endcond */
-
-/*! @cond Doxygen ignores this part */
-/* C-language Attributes are added in C23. */
-#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= XXH_C23_VN) && defined(__has_c_attribute)
-# define XXH_HAS_C_ATTRIBUTE(x) __has_c_attribute(x)
-#else
-# define XXH_HAS_C_ATTRIBUTE(x) 0
-#endif
-/*! @endcond */
-
-/*! @cond Doxygen ignores this part */
-#if defined(__cplusplus) && defined(__has_cpp_attribute)
-# define XXH_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
-#else
-# define XXH_HAS_CPP_ATTRIBUTE(x) 0
-#endif
-/*! @endcond */
-
-/*! @cond Doxygen ignores this part */
-/*
- * Define XXH_FALLTHROUGH macro for annotating switch case with the 'fallthrough' attribute
- * introduced in CPP17 and C23.
- * CPP17 : https://en.cppreference.com/w/cpp/language/attributes/fallthrough
- * C23 : https://en.cppreference.com/w/c/language/attributes/fallthrough
- */
-#if XXH_HAS_C_ATTRIBUTE(fallthrough) || XXH_HAS_CPP_ATTRIBUTE(fallthrough)
-# define XXH_FALLTHROUGH [[fallthrough]]
-#elif XXH_HAS_ATTRIBUTE(__fallthrough__)
-# define XXH_FALLTHROUGH __attribute__ ((__fallthrough__))
-#else
-# define XXH_FALLTHROUGH /* fallthrough */
-#endif
-/*! @endcond */
-
-/*! @cond Doxygen ignores this part */
-/*
- * Define XXH_NOESCAPE for annotated pointers in public API.
- * https://clang.llvm.org/docs/AttributeReference.html#noescape
- * As of writing this, only supported by clang.
- */
-#if XXH_HAS_ATTRIBUTE(noescape)
-# define XXH_NOESCAPE __attribute__((noescape))
-#else
-# define XXH_NOESCAPE
-#endif
-/*! @endcond */
-
-
-/*!
- * @}
- * @ingroup public
- * @{
- */
-
-#ifndef XXH_NO_LONG_LONG
-/*-**********************************************************************
-* 64-bit hash
-************************************************************************/
-#if defined(XXH_DOXYGEN) /* don't include <stdint.h> */
-/*!
- * @brief An unsigned 64-bit integer.
- *
- * Not necessarily defined to `uint64_t` but functionally equivalent.
- */
-typedef uint64_t XXH64_hash_t;
-#elif !defined (__VMS) \
- && (defined (__cplusplus) \
- || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
-# include <stdint.h>
- typedef uint64_t XXH64_hash_t;
-#else
-# include <limits.h>
-# if defined(__LP64__) && ULONG_MAX == 0xFFFFFFFFFFFFFFFFULL
- /* LP64 ABI says uint64_t is unsigned long */
- typedef unsigned long XXH64_hash_t;
-# else
- /* the following type must have a width of 64-bit */
- typedef unsigned long long XXH64_hash_t;
-# endif
-#endif
-
-/*!
- * @}
- *
- * @defgroup XXH64_family XXH64 family
- * @ingroup public
- * @{
- * 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.
- */
-
-/*!
- * @brief Calculates the 64-bit hash of @p input using xxHash64.
- *
- * This function usually runs faster on 64-bit systems, but slower on 32-bit
- * systems (see benchmark).
- *
- * @param input The block of data to be hashed, at least @p length bytes in size.
- * @param length The length of @p input, in bytes.
- * @param seed The 64-bit seed to alter the hash's output predictably.
- *
- * @pre
- * The memory between @p input and @p input + @p length must be valid,
- * readable, contiguous memory. However, if @p length is `0`, @p input may be
- * `NULL`. In C++, this also must be *TriviallyCopyable*.
- *
- * @return The calculated 64-bit hash.
- *
- * @see
- * XXH32(), XXH3_64bits_withSeed(), XXH3_128bits_withSeed(), XXH128():
- * Direct equivalents for the other variants of xxHash.
- * @see
- * XXH64_createState(), XXH64_update(), XXH64_digest(): Streaming version.
- */
-XXH_PUBLIC_API XXH_PUREF XXH64_hash_t XXH64(XXH_NOESCAPE const void* input, size_t length, XXH64_hash_t seed);
-
-/******* Streaming *******/
-#ifndef XXH_NO_STREAM
-/*!
- * @brief The opaque state struct for the XXH64 streaming API.
- *
- * @see XXH64_state_s for details.
- */
-typedef struct XXH64_state_s XXH64_state_t; /* incomplete type */
-
-/*!
- * @brief Allocates an @ref XXH64_state_t.
- *
- * Must be freed with XXH64_freeState().
- * @return An allocated XXH64_state_t on success, `NULL` on failure.
- */
-XXH_PUBLIC_API XXH_MALLOCF XXH64_state_t* XXH64_createState(void);
-
-/*!
- * @brief Frees an @ref XXH64_state_t.
- *
- * Must be allocated with XXH64_createState().
- * @param statePtr A pointer to an @ref XXH64_state_t allocated with @ref XXH64_createState().
- * @return XXH_OK.
- */
-XXH_PUBLIC_API XXH_errorcode XXH64_freeState(XXH64_state_t* statePtr);
-
-/*!
- * @brief Copies one @ref XXH64_state_t to another.
- *
- * @param dst_state The state to copy to.
- * @param src_state The state to copy from.
- * @pre
- * @p dst_state and @p src_state must not be `NULL` and must not overlap.
- */
-XXH_PUBLIC_API void XXH64_copyState(XXH_NOESCAPE XXH64_state_t* dst_state, const XXH64_state_t* src_state);
-
-/*!
- * @brief Resets an @ref XXH64_state_t to begin a new hash.
- *
- * This function resets and seeds a state. Call it before @ref XXH64_update().
- *
- * @param statePtr The state struct to reset.
- * @param seed The 64-bit seed to alter the hash result predictably.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- *
- * @return @ref XXH_OK on success, @ref XXH_ERROR on failure.
- */
-XXH_PUBLIC_API XXH_errorcode XXH64_reset (XXH_NOESCAPE XXH64_state_t* statePtr, XXH64_hash_t seed);
-
-/*!
- * @brief Consumes a block of @p input to an @ref XXH64_state_t.
- *
- * Call this to incrementally consume blocks of data.
- *
- * @param statePtr The state struct to update.
- * @param input The block of data to be hashed, at least @p length bytes in size.
- * @param length The length of @p input, in bytes.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- * @pre
- * The memory between @p input and @p input + @p length must be valid,
- * readable, contiguous memory. However, if @p length is `0`, @p input may be
- * `NULL`. In C++, this also must be *TriviallyCopyable*.
- *
- * @return @ref XXH_OK on success, @ref XXH_ERROR on failure.
- */
-XXH_PUBLIC_API XXH_errorcode XXH64_update (XXH_NOESCAPE XXH64_state_t* statePtr, XXH_NOESCAPE const void* input, size_t length);
-
-/*!
- * @brief Returns the calculated hash value from an @ref XXH64_state_t.
- *
- * @note
- * Calling XXH64_digest() will not affect @p statePtr, so you can update,
- * digest, and update again.
- *
- * @param statePtr The state struct to calculate the hash from.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- *
- * @return The calculated xxHash64 value from that state.
- */
-XXH_PUBLIC_API XXH_PUREF XXH64_hash_t XXH64_digest (XXH_NOESCAPE const XXH64_state_t* statePtr);
-#endif /* !XXH_NO_STREAM */
-/******* Canonical representation *******/
-
-/*!
- * @brief Canonical (big endian) representation of @ref XXH64_hash_t.
- */
-typedef struct { unsigned char digest[sizeof(XXH64_hash_t)]; } XXH64_canonical_t;
-
-/*!
- * @brief Converts an @ref XXH64_hash_t to a big endian @ref XXH64_canonical_t.
- *
- * @param dst The @ref XXH64_canonical_t pointer to be stored to.
- * @param hash The @ref XXH64_hash_t to be converted.
- *
- * @pre
- * @p dst must not be `NULL`.
- */
-XXH_PUBLIC_API void XXH64_canonicalFromHash(XXH_NOESCAPE XXH64_canonical_t* dst, XXH64_hash_t hash);
-
-/*!
- * @brief Converts an @ref XXH64_canonical_t to a native @ref XXH64_hash_t.
- *
- * @param src The @ref XXH64_canonical_t to convert.
- *
- * @pre
- * @p src must not be `NULL`.
- *
- * @return The converted hash.
- */
-XXH_PUBLIC_API XXH_PUREF XXH64_hash_t XXH64_hashFromCanonical(XXH_NOESCAPE const XXH64_canonical_t* src);
-
-#ifndef XXH_NO_XXH3
-
-/*!
- * @}
- * ************************************************************************
- * @defgroup XXH3_family XXH3 family
- * @ingroup public
- * @{
- *
- * XXH3 is a more recent hash algorithm featuring:
- * - Improved speed for both small and large inputs
- * - True 64-bit and 128-bit outputs
- * - SIMD acceleration
- * - Improved 32-bit viability
- *
- * Speed analysis methodology is explained here:
- *
- * https://fastcompression.blogspot.com/2019/03/presenting-xxh3.html
- *
- * Compared to XXH64, expect XXH3 to run approximately
- * ~2x faster on large inputs and >3x faster on small ones,
- * exact differences vary depending on platform.
- *
- * XXH3's speed benefits greatly from SIMD and 64-bit arithmetic,
- * but does not require it.
- * Most 32-bit and 64-bit targets that can run XXH32 smoothly can run XXH3
- * at competitive speeds, even without vector support. Further details are
- * explained in the implementation.
- *
- * XXH3 has a fast scalar implementation, but it also includes accelerated SIMD
- * implementations for many common platforms:
- * - AVX512
- * - AVX2
- * - SSE2
- * - ARM NEON
- * - WebAssembly SIMD128
- * - POWER8 VSX
- * - s390x ZVector
- * This can be controlled via the @ref XXH_VECTOR macro, but it automatically
- * selects the best version according to predefined macros. For the x86 family, an
- * automatic runtime dispatcher is included separately in @ref xxh_x86dispatch.c.
- *
- * XXH3 implementation is portable:
- * it has a generic C90 formulation that can be compiled on any platform,
- * all implementations generate exactly the same hash value on all platforms.
- * Starting from v0.8.0, it's also labelled "stable", meaning that
- * any future version will also generate the same hash value.
- *
- * XXH3 offers 2 variants, _64bits and _128bits.
- *
- * When only 64 bits are needed, prefer invoking the _64bits variant, as 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 API supports one-shot hashing, streaming mode, and custom secrets.
- */
-/*-**********************************************************************
-* XXH3 64-bit variant
-************************************************************************/
-
-/*!
- * @brief 64-bit unseeded variant of XXH3.
- *
- * This is equivalent to @ref XXH3_64bits_withSeed() with a seed of 0, however
- * it may have slightly better performance due to constant propagation of the
- * defaults.
- *
- * @see
- * XXH32(), XXH64(), XXH3_128bits(): equivalent for the other xxHash algorithms
- * @see
- * XXH3_64bits_withSeed(), XXH3_64bits_withSecret(): other seeding variants
- * @see
- * XXH3_64bits_reset(), XXH3_64bits_update(), XXH3_64bits_digest(): Streaming version.
- */
-XXH_PUBLIC_API XXH_PUREF XXH64_hash_t XXH3_64bits(XXH_NOESCAPE const void* input, size_t length);
-
-/*!
- * @brief 64-bit seeded variant of XXH3
- *
- * This variant generates a custom secret on the fly based on default secret
- * altered using the `seed` value.
- *
- * While this operation is decently fast, note that it's not completely free.
- *
- * @note
- * seed == 0 produces the same results as @ref XXH3_64bits().
- *
- * @param input The data to hash
- * @param length The length
- * @param seed The 64-bit seed to alter the state.
- */
-XXH_PUBLIC_API XXH_PUREF XXH64_hash_t XXH3_64bits_withSeed(XXH_NOESCAPE const void* input, size_t length, XXH64_hash_t seed);
-
-/*!
- * The bare minimum size for a custom secret.
- *
- * @see
- * XXH3_64bits_withSecret(), XXH3_64bits_reset_withSecret(),
- * XXH3_128bits_withSecret(), XXH3_128bits_reset_withSecret().
- */
-#define XXH3_SECRET_SIZE_MIN 136
-
-/*!
- * @brief 64-bit variant of XXH3 with a custom "secret".
- *
- * 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 main condition is that secretSize *must* be large enough (>= XXH3_SECRET_SIZE_MIN).
- * However, the quality of the secret impacts the dispersion of the hash algorithm.
- * Therefore, the secret _must_ look like a bunch of random bytes.
- * Avoid "trivial" or structured data such as repeated sequences or a text document.
- * Whenever in doubt about the "randomness" of the blob of bytes,
- * consider employing "XXH3_generateSecret()" instead (see below).
- * It will generate a proper high entropy secret derived from the blob of bytes.
- * Another advantage of using XXH3_generateSecret() is that
- * it guarantees that all bits within the initial blob of bytes
- * will impact every bit of the output.
- * This is not necessarily the case when using the blob of bytes directly
- * because, when hashing _small_ inputs, only a portion of the secret is employed.
- */
-XXH_PUBLIC_API XXH_PUREF XXH64_hash_t XXH3_64bits_withSecret(XXH_NOESCAPE const void* data, size_t len, XXH_NOESCAPE const void* secret, size_t secretSize);
-
-
-/******* Streaming *******/
-#ifndef XXH_NO_STREAM
-/*
- * Streaming requires state maintenance.
- * This operation costs memory and CPU.
- * As a consequence, streaming is slower than one-shot hashing.
- * For better performance, prefer one-shot functions whenever applicable.
- */
-
-/*!
- * @brief The state struct for the XXH3 streaming API.
- *
- * @see XXH3_state_s for details.
- */
-typedef struct XXH3_state_s XXH3_state_t;
-XXH_PUBLIC_API XXH_MALLOCF XXH3_state_t* XXH3_createState(void);
-XXH_PUBLIC_API XXH_errorcode XXH3_freeState(XXH3_state_t* statePtr);
-
-/*!
- * @brief Copies one @ref XXH3_state_t to another.
- *
- * @param dst_state The state to copy to.
- * @param src_state The state to copy from.
- * @pre
- * @p dst_state and @p src_state must not be `NULL` and must not overlap.
- */
-XXH_PUBLIC_API void XXH3_copyState(XXH_NOESCAPE XXH3_state_t* dst_state, XXH_NOESCAPE const XXH3_state_t* src_state);
-
-/*!
- * @brief Resets an @ref XXH3_state_t to begin a new hash.
- *
- * This function resets `statePtr` and generate a secret with default parameters. Call it before @ref XXH3_64bits_update().
- * Digest will be equivalent to `XXH3_64bits()`.
- *
- * @param statePtr The state struct to reset.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- *
- * @return @ref XXH_OK on success, @ref XXH_ERROR on failure.
- *
- */
-XXH_PUBLIC_API XXH_errorcode XXH3_64bits_reset(XXH_NOESCAPE XXH3_state_t* statePtr);
-
-/*!
- * @brief Resets an @ref XXH3_state_t with 64-bit seed to begin a new hash.
- *
- * This function resets `statePtr` and generate a secret from `seed`. Call it before @ref XXH3_64bits_update().
- * Digest will be equivalent to `XXH3_64bits_withSeed()`.
- *
- * @param statePtr The state struct to reset.
- * @param seed The 64-bit seed to alter the state.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- *
- * @return @ref XXH_OK on success, @ref XXH_ERROR on failure.
- *
- */
-XXH_PUBLIC_API XXH_errorcode XXH3_64bits_reset_withSeed(XXH_NOESCAPE XXH3_state_t* statePtr, XXH64_hash_t seed);
-
-/*!
- * XXH3_64bits_reset_withSecret():
- * `secret` is referenced, it _must outlive_ the hash streaming session.
- * Similar to one-shot API, `secretSize` must be >= `XXH3_SECRET_SIZE_MIN`,
- * and the quality of produced hash values depends on secret's entropy
- * (secret's content should look like a bunch of random bytes).
- * When in doubt about the randomness of a candidate `secret`,
- * consider employing `XXH3_generateSecret()` instead (see below).
- */
-XXH_PUBLIC_API XXH_errorcode XXH3_64bits_reset_withSecret(XXH_NOESCAPE XXH3_state_t* statePtr, XXH_NOESCAPE const void* secret, size_t secretSize);
-
-/*!
- * @brief Consumes a block of @p input to an @ref XXH3_state_t.
- *
- * Call this to incrementally consume blocks of data.
- *
- * @param statePtr The state struct to update.
- * @param input The block of data to be hashed, at least @p length bytes in size.
- * @param length The length of @p input, in bytes.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- * @pre
- * The memory between @p input and @p input + @p length must be valid,
- * readable, contiguous memory. However, if @p length is `0`, @p input may be
- * `NULL`. In C++, this also must be *TriviallyCopyable*.
- *
- * @return @ref XXH_OK on success, @ref XXH_ERROR on failure.
- */
-XXH_PUBLIC_API XXH_errorcode XXH3_64bits_update (XXH_NOESCAPE XXH3_state_t* statePtr, XXH_NOESCAPE const void* input, size_t length);
-
-/*!
- * @brief Returns the calculated XXH3 64-bit hash value from an @ref XXH3_state_t.
- *
- * @note
- * Calling XXH3_64bits_digest() will not affect @p statePtr, so you can update,
- * digest, and update again.
- *
- * @param statePtr The state struct to calculate the hash from.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- *
- * @return The calculated XXH3 64-bit hash value from that state.
- */
-XXH_PUBLIC_API XXH_PUREF XXH64_hash_t XXH3_64bits_digest (XXH_NOESCAPE const XXH3_state_t* statePtr);
-#endif /* !XXH_NO_STREAM */
-
-/* note : canonical representation of XXH3 is the same as XXH64
- * since they both produce XXH64_hash_t values */
-
-
-/*-**********************************************************************
-* XXH3 128-bit variant
-************************************************************************/
-
-/*!
- * @brief The return value from 128-bit hashes.
- *
- * Stored in little endian order, although the fields themselves are in native
- * endianness.
- */
-typedef struct {
- XXH64_hash_t low64; /*!< `value & 0xFFFFFFFFFFFFFFFF` */
- XXH64_hash_t high64; /*!< `value >> 64` */
-} XXH128_hash_t;
-
-/*!
- * @brief Unseeded 128-bit variant of XXH3
- *
- * The 128-bit variant of XXH3 has more strength, but it has a bit of overhead
- * for shorter inputs.
- *
- * This is equivalent to @ref XXH3_128bits_withSeed() with a seed of 0, however
- * it may have slightly better performance due to constant propagation of the
- * defaults.
- *
- * @see
- * XXH32(), XXH64(), XXH3_64bits(): equivalent for the other xxHash algorithms
- * @see
- * XXH3_128bits_withSeed(), XXH3_128bits_withSecret(): other seeding variants
- * @see
- * XXH3_128bits_reset(), XXH3_128bits_update(), XXH3_128bits_digest(): Streaming version.
- */
-XXH_PUBLIC_API XXH_PUREF XXH128_hash_t XXH3_128bits(XXH_NOESCAPE const void* data, size_t len);
-/*! @brief Seeded 128-bit variant of XXH3. @see XXH3_64bits_withSeed(). */
-XXH_PUBLIC_API XXH_PUREF XXH128_hash_t XXH3_128bits_withSeed(XXH_NOESCAPE const void* data, size_t len, XXH64_hash_t seed);
-/*! @brief Custom secret 128-bit variant of XXH3. @see XXH3_64bits_withSecret(). */
-XXH_PUBLIC_API XXH_PUREF XXH128_hash_t XXH3_128bits_withSecret(XXH_NOESCAPE const void* data, size_t len, XXH_NOESCAPE const void* secret, size_t secretSize);
-
-/******* Streaming *******/
-#ifndef XXH_NO_STREAM
-/*
- * Streaming requires state maintenance.
- * This operation costs memory and CPU.
- * As a consequence, streaming is slower than one-shot hashing.
- * For better performance, prefer one-shot functions whenever applicable.
- *
- * XXH3_128bits uses the same XXH3_state_t as XXH3_64bits().
- * Use already declared XXH3_createState() and XXH3_freeState().
- *
- * All reset and streaming functions have same meaning as their 64-bit counterpart.
- */
-
-/*!
- * @brief Resets an @ref XXH3_state_t to begin a new hash.
- *
- * This function resets `statePtr` and generate a secret with default parameters. Call it before @ref XXH3_128bits_update().
- * Digest will be equivalent to `XXH3_128bits()`.
- *
- * @param statePtr The state struct to reset.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- *
- * @return @ref XXH_OK on success, @ref XXH_ERROR on failure.
- *
- */
-XXH_PUBLIC_API XXH_errorcode XXH3_128bits_reset(XXH_NOESCAPE XXH3_state_t* statePtr);
-
-/*!
- * @brief Resets an @ref XXH3_state_t with 64-bit seed to begin a new hash.
- *
- * This function resets `statePtr` and generate a secret from `seed`. Call it before @ref XXH3_128bits_update().
- * Digest will be equivalent to `XXH3_128bits_withSeed()`.
- *
- * @param statePtr The state struct to reset.
- * @param seed The 64-bit seed to alter the state.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- *
- * @return @ref XXH_OK on success, @ref XXH_ERROR on failure.
- *
- */
-XXH_PUBLIC_API XXH_errorcode XXH3_128bits_reset_withSeed(XXH_NOESCAPE XXH3_state_t* statePtr, XXH64_hash_t seed);
-/*! @brief Custom secret 128-bit variant of XXH3. @see XXH_64bits_reset_withSecret(). */
-XXH_PUBLIC_API XXH_errorcode XXH3_128bits_reset_withSecret(XXH_NOESCAPE XXH3_state_t* statePtr, XXH_NOESCAPE const void* secret, size_t secretSize);
-
-/*!
- * @brief Consumes a block of @p input to an @ref XXH3_state_t.
- *
- * Call this to incrementally consume blocks of data.
- *
- * @param statePtr The state struct to update.
- * @param input The block of data to be hashed, at least @p length bytes in size.
- * @param length The length of @p input, in bytes.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- * @pre
- * The memory between @p input and @p input + @p length must be valid,
- * readable, contiguous memory. However, if @p length is `0`, @p input may be
- * `NULL`. In C++, this also must be *TriviallyCopyable*.
- *
- * @return @ref XXH_OK on success, @ref XXH_ERROR on failure.
- */
-XXH_PUBLIC_API XXH_errorcode XXH3_128bits_update (XXH_NOESCAPE XXH3_state_t* statePtr, XXH_NOESCAPE const void* input, size_t length);
-
-/*!
- * @brief Returns the calculated XXH3 128-bit hash value from an @ref XXH3_state_t.
- *
- * @note
- * Calling XXH3_128bits_digest() will not affect @p statePtr, so you can update,
- * digest, and update again.
- *
- * @param statePtr The state struct to calculate the hash from.
- *
- * @pre
- * @p statePtr must not be `NULL`.
- *
- * @return The calculated XXH3 128-bit hash value from that state.
- */
-XXH_PUBLIC_API XXH_PUREF XXH128_hash_t XXH3_128bits_digest (XXH_NOESCAPE const XXH3_state_t* statePtr);
-#endif /* !XXH_NO_STREAM */
-
-/* Following helper functions make it possible to compare XXH128_hast_t values.
- * Since XXH128_hash_t is a structure, this capability is not offered by the language.
- * Note: For better performance, these functions can be inlined using XXH_INLINE_ALL */
-
-/*!
- * XXH128_isEqual():
- * Return: 1 if `h1` and `h2` are equal, 0 if they are not.
- */
-XXH_PUBLIC_API XXH_PUREF int XXH128_isEqual(XXH128_hash_t h1, XXH128_hash_t h2);
-
-/*!
- * @brief Compares two @ref XXH128_hash_t
- * This comparator is compatible with stdlib's `qsort()`/`bsearch()`.
- *
- * @return: >0 if *h128_1 > *h128_2
- * =0 if *h128_1 == *h128_2
- * <0 if *h128_1 < *h128_2
- */
-XXH_PUBLIC_API XXH_PUREF int XXH128_cmp(XXH_NOESCAPE const void* h128_1, XXH_NOESCAPE const void* h128_2);
-
-
-/******* Canonical representation *******/
-typedef struct { unsigned char digest[sizeof(XXH128_hash_t)]; } XXH128_canonical_t;
-
-
-/*!
- * @brief Converts an @ref XXH128_hash_t to a big endian @ref XXH128_canonical_t.
- *
- * @param dst The @ref XXH128_canonical_t pointer to be stored to.
- * @param hash The @ref XXH128_hash_t to be converted.
- *
- * @pre
- * @p dst must not be `NULL`.
- */
-XXH_PUBLIC_API void XXH128_canonicalFromHash(XXH_NOESCAPE XXH128_canonical_t* dst, XXH128_hash_t hash);
-
-/*!
- * @brief Converts an @ref XXH128_canonical_t to a native @ref XXH128_hash_t.
- *
- * @param src The @ref XXH128_canonical_t to convert.
- *
- * @pre
- * @p src must not be `NULL`.
- *
- * @return The converted hash.
- */
-XXH_PUBLIC_API XXH_PUREF XXH128_hash_t XXH128_hashFromCanonical(XXH_NOESCAPE const XXH128_canonical_t* src);
-
-
-#endif /* !XXH_NO_XXH3 */
-#endif /* XXH_NO_LONG_LONG */
-
-/*!
- * @}
- */
-#endif /* XXHASH_H_5627135585666179 */
-
-
-
-#if defined(XXH_STATIC_LINKING_ONLY) && !defined(XXHASH_H_STATIC_13879238742)
-#define XXHASH_H_STATIC_13879238742
-/* ****************************************************************************
- * 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 states, on stack or in a struct, for example.
- * Never **ever** access their members directly.
- */
-
-/*!
- * @internal
- * @brief Structure for XXH32 streaming API.
- *
- * @note This is only defined when @ref XXH_STATIC_LINKING_ONLY,
- * @ref XXH_INLINE_ALL, or @ref XXH_IMPLEMENTATION is defined. Otherwise it is
- * an opaque type. This allows fields to safely be changed.
- *
- * Typedef'd to @ref XXH32_state_t.
- * Do not access the members of this struct directly.
- * @see XXH64_state_s, XXH3_state_s
- */
-struct XXH32_state_s {
- XXH32_hash_t total_len_32; /*!< Total length hashed, modulo 2^32 */
- XXH32_hash_t large_len; /*!< Whether the hash is >= 16 (handles @ref total_len_32 overflow) */
- XXH32_hash_t v[4]; /*!< Accumulator lanes */
- XXH32_hash_t mem32[4]; /*!< Internal buffer for partial reads. Treated as unsigned char[16]. */
- XXH32_hash_t memsize; /*!< Amount of data in @ref mem32 */
- XXH32_hash_t reserved; /*!< Reserved field. Do not read nor write to it. */
-}; /* typedef'd to XXH32_state_t */
-
-
-#ifndef XXH_NO_LONG_LONG /* defined when there is no 64-bit support */
-
-/*!
- * @internal
- * @brief Structure for XXH64 streaming API.
- *
- * @note This is only defined when @ref XXH_STATIC_LINKING_ONLY,
- * @ref XXH_INLINE_ALL, or @ref XXH_IMPLEMENTATION is defined. Otherwise it is
- * an opaque type. This allows fields to safely be changed.
- *
- * Typedef'd to @ref XXH64_state_t.
- * Do not access the members of this struct directly.
- * @see XXH32_state_s, XXH3_state_s
- */
-struct XXH64_state_s {
- XXH64_hash_t total_len; /*!< Total length hashed. This is always 64-bit. */
- XXH64_hash_t v[4]; /*!< Accumulator lanes */
- XXH64_hash_t mem64[4]; /*!< Internal buffer for partial reads. Treated as unsigned char[32]. */
- XXH32_hash_t memsize; /*!< Amount of data in @ref mem64 */
- XXH32_hash_t reserved32; /*!< Reserved field, needed for padding anyways*/
- XXH64_hash_t reserved64; /*!< Reserved field. Do not read or write to it. */
-}; /* typedef'd to XXH64_state_t */
-
-#ifndef XXH_NO_XXH3
-
-#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) /* >= C11 */
-# include <stdalign.h>
-# define XXH_ALIGN(n) alignas(n)
-#elif defined(__cplusplus) && (__cplusplus >= 201103L) /* >= C++11 */
-/* In C++ alignas() is a keyword */
-# 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
-
-/* Old GCC versions only accept the attribute after the type in structures. */
-#if !(defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)) /* C11+ */ \
- && ! (defined(__cplusplus) && (__cplusplus >= 201103L)) /* >= C++11 */ \
- && defined(__GNUC__)
-# define XXH_ALIGN_MEMBER(align, type) type XXH_ALIGN(align)
-#else
-# define XXH_ALIGN_MEMBER(align, type) XXH_ALIGN(align) type
-#endif
-
-/*!
- * @brief The size of the internal XXH3 buffer.
- *
- * This is the optimal update size for incremental hashing.
- *
- * @see XXH3_64b_update(), XXH3_128b_update().
- */
-#define XXH3_INTERNALBUFFER_SIZE 256
-
-/*!
- * @internal
- * @brief Default size of the secret buffer (and @ref XXH3_kSecret).
- *
- * This is the size used in @ref XXH3_kSecret and the seeded functions.
- *
- * Not to be confused with @ref XXH3_SECRET_SIZE_MIN.
- */
-#define XXH3_SECRET_DEFAULT_SIZE 192
-
-/*!
- * @internal
- * @brief Structure for XXH3 streaming API.
- *
- * @note This is only defined when @ref XXH_STATIC_LINKING_ONLY,
- * @ref XXH_INLINE_ALL, or @ref XXH_IMPLEMENTATION is defined.
- * Otherwise it is an opaque type.
- * Never use this definition in combination with dynamic library.
- * This allows fields to safely be changed in the future.
- *
- * @note ** This structure has a strict alignment requirement of 64 bytes!! **
- * Do not allocate this with `malloc()` or `new`,
- * it will not be sufficiently aligned.
- * Use @ref XXH3_createState() and @ref XXH3_freeState(), or stack allocation.
- *
- * Typedef'd to @ref XXH3_state_t.
- * Do never access the members of this struct directly.
- *
- * @see XXH3_INITSTATE() for stack initialization.
- * @see XXH3_createState(), XXH3_freeState().
- * @see XXH32_state_s, XXH64_state_s
- */
-struct XXH3_state_s {
- XXH_ALIGN_MEMBER(64, XXH64_hash_t acc[8]);
- /*!< The 8 accumulators. See @ref XXH32_state_s::v and @ref XXH64_state_s::v */
- XXH_ALIGN_MEMBER(64, unsigned char customSecret[XXH3_SECRET_DEFAULT_SIZE]);
- /*!< Used to store a custom secret generated from a seed. */
- XXH_ALIGN_MEMBER(64, unsigned char buffer[XXH3_INTERNALBUFFER_SIZE]);
- /*!< The internal buffer. @see XXH32_state_s::mem32 */
- XXH32_hash_t bufferedSize;
- /*!< The amount of memory in @ref buffer, @see XXH32_state_s::memsize */
- XXH32_hash_t useSeed;
- /*!< Reserved field. Needed for padding on 64-bit. */
- size_t nbStripesSoFar;
- /*!< Number or stripes processed. */
- XXH64_hash_t totalLen;
- /*!< Total length hashed. 64-bit even on 32-bit targets. */
- size_t nbStripesPerBlock;
- /*!< Number of stripes per block. */
- size_t secretLimit;
- /*!< Size of @ref customSecret or @ref extSecret */
- XXH64_hash_t seed;
- /*!< Seed for _withSeed variants. Must be zero otherwise, @see XXH3_INITSTATE() */
- XXH64_hash_t reserved64;
- /*!< Reserved field. */
- const unsigned char* extSecret;
- /*!< Reference to an external secret for the _withSecret variants, NULL
- * for other variants. */
- /* note: there may be some padding at the end due to alignment on 64 bytes */
-}; /* typedef'd to XXH3_state_t */
-
-#undef XXH_ALIGN_MEMBER
-
-/*!
- * @brief Initializes a stack-allocated `XXH3_state_s`.
- *
- * When the @ref XXH3_state_t structure is merely emplaced on stack,
- * it should be initialized with XXH3_INITSTATE() or a memset()
- * in case its first reset uses XXH3_NNbits_reset_withSeed().
- * This init can be omitted if the first reset uses default or _withSecret mode.
- * This operation isn't necessary when the state is created with XXH3_createState().
- * Note that this doesn't prepare the state for a streaming operation,
- * it's still necessary to use XXH3_NNbits_reset*() afterwards.
- */
-#define XXH3_INITSTATE(XXH3_state_ptr) \
- do { \
- XXH3_state_t* tmp_xxh3_state_ptr = (XXH3_state_ptr); \
- tmp_xxh3_state_ptr->seed = 0; \
- tmp_xxh3_state_ptr->extSecret = NULL; \
- } while(0)
-
-
-/*!
- * simple alias to pre-selected XXH3_128bits variant
- */
-XXH_PUBLIC_API XXH_PUREF XXH128_hash_t XXH128(XXH_NOESCAPE const void* data, size_t len, XXH64_hash_t seed);
-
-
-/* === Experimental API === */
-/* Symbols defined below must be considered tied to a specific library version. */
-
-/*!
- * XXH3_generateSecret():
- *
- * Derive a high-entropy secret from any user-defined content, named customSeed.
- * The generated secret can be used in combination with `*_withSecret()` functions.
- * The `_withSecret()` variants are useful to provide a higher level of protection
- * than 64-bit seed, as it becomes much more difficult for an external actor to
- * guess how to impact the calculation logic.
- *
- * The function accepts as input a custom seed of any length and any content,
- * and derives from it a high-entropy secret of length @p secretSize into an
- * already allocated buffer @p secretBuffer.
- *
- * The generated secret can then be used with any `*_withSecret()` variant.
- * The functions @ref XXH3_128bits_withSecret(), @ref XXH3_64bits_withSecret(),
- * @ref XXH3_128bits_reset_withSecret() and @ref XXH3_64bits_reset_withSecret()
- * are part of this list. They all accept a `secret` parameter
- * which must be large enough for implementation reasons (>= @ref XXH3_SECRET_SIZE_MIN)
- * _and_ feature very high entropy (consist of random-looking bytes).
- * These conditions can be a high bar to meet, so @ref XXH3_generateSecret() can
- * be employed to ensure proper quality.
- *
- * @p customSeed can be anything. It can have any size, even small ones,
- * and its content can be anything, even "poor entropy" sources such as a bunch
- * of zeroes. The resulting `secret` will nonetheless provide all required qualities.
- *
- * @pre
- * - @p secretSize must be >= @ref XXH3_SECRET_SIZE_MIN
- * - When @p customSeedSize > 0, supplying NULL as customSeed is undefined behavior.
- *
- * Example code:
- * @code{.c}
- * #include <stdio.h>
- * #include <stdlib.h>
- * #include <string.h>
- * #define XXH_STATIC_LINKING_ONLY // expose unstable API
- * #include "xxhash.h"
- * // Hashes argv[2] using the entropy from argv[1].
- * int main(int argc, char* argv[])
- * {
- * char secret[XXH3_SECRET_SIZE_MIN];
- * if (argv != 3) { return 1; }
- * XXH3_generateSecret(secret, sizeof(secret), argv[1], strlen(argv[1]));
- * XXH64_hash_t h = XXH3_64bits_withSecret(
- * argv[2], strlen(argv[2]),
- * secret, sizeof(secret)
- * );
- * printf("%016llx\n", (unsigned long long) h);
- * }
- * @endcode
- */
-XXH_PUBLIC_API XXH_errorcode XXH3_generateSecret(XXH_NOESCAPE void* secretBuffer, size_t secretSize, XXH_NOESCAPE const void* customSeed, size_t customSeedSize);
-
-/*!
- * @brief Generate the same secret as the _withSeed() variants.
- *
- * The generated secret can be used in combination with
- *`*_withSecret()` and `_withSecretandSeed()` variants.
- *
- * Example C++ `std::string` hash class:
- * @code{.cpp}
- * #include <string>
- * #define XXH_STATIC_LINKING_ONLY // expose unstable API
- * #include "xxhash.h"
- * // Slow, seeds each time
- * class HashSlow {
- * XXH64_hash_t seed;
- * public:
- * HashSlow(XXH64_hash_t s) : seed{s} {}
- * size_t operator()(const std::string& x) const {
- * return size_t{XXH3_64bits_withSeed(x.c_str(), x.length(), seed)};
- * }
- * };
- * // Fast, caches the seeded secret for future uses.
- * class HashFast {
- * unsigned char secret[XXH3_SECRET_SIZE_MIN];
- * public:
- * HashFast(XXH64_hash_t s) {
- * XXH3_generateSecret_fromSeed(secret, seed);
- * }
- * size_t operator()(const std::string& x) const {
- * return size_t{
- * XXH3_64bits_withSecret(x.c_str(), x.length(), secret, sizeof(secret))
- * };
- * }
- * };
- * @endcode
- * @param secretBuffer A writable buffer of @ref XXH3_SECRET_SIZE_MIN bytes
- * @param seed The seed to seed the state.
- */
-XXH_PUBLIC_API void XXH3_generateSecret_fromSeed(XXH_NOESCAPE void* secretBuffer, XXH64_hash_t seed);
-
-/*!
- * These variants generate hash values using either
- * @p seed for "short" keys (< XXH3_MIDSIZE_MAX = 240 bytes)
- * or @p secret for "large" keys (>= XXH3_MIDSIZE_MAX).
- *
- * This generally benefits speed, compared to `_withSeed()` or `_withSecret()`.
- * `_withSeed()` has to generate the secret on the fly for "large" keys.
- * It's fast, but can be perceptible for "not so large" keys (< 1 KB).
- * `_withSecret()` has to generate the masks on the fly for "small" keys,
- * which requires more instructions than _withSeed() variants.
- * Therefore, _withSecretandSeed variant combines the best of both worlds.
- *
- * When @p secret has been generated by XXH3_generateSecret_fromSeed(),
- * this variant produces *exactly* the same results as `_withSeed()` variant,
- * hence offering only a pure speed benefit on "large" input,
- * by skipping the need to regenerate the secret for every large input.
- *
- * Another usage scenario is to hash the secret to a 64-bit hash value,
- * for example with XXH3_64bits(), which then becomes the seed,
- * and then employ both the seed and the secret in _withSecretandSeed().
- * On top of speed, an added benefit is that each bit in the secret
- * has a 50% chance to swap each bit in the output, via its impact to the seed.
- *
- * This is not guaranteed when using the secret directly in "small data" scenarios,
- * because only portions of the secret are employed for small data.
- */
-XXH_PUBLIC_API XXH_PUREF XXH64_hash_t
-XXH3_64bits_withSecretandSeed(XXH_NOESCAPE const void* data, size_t len,
- XXH_NOESCAPE const void* secret, size_t secretSize,
- XXH64_hash_t seed);
-/*! @copydoc XXH3_64bits_withSecretandSeed() */
-XXH_PUBLIC_API XXH_PUREF XXH128_hash_t
-XXH3_128bits_withSecretandSeed(XXH_NOESCAPE const void* input, size_t length,
- XXH_NOESCAPE const void* secret, size_t secretSize,
- XXH64_hash_t seed64);
-#ifndef XXH_NO_STREAM
-/*! @copydoc XXH3_64bits_withSecretandSeed() */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_64bits_reset_withSecretandSeed(XXH_NOESCAPE XXH3_state_t* statePtr,
- XXH_NOESCAPE const void* secret, size_t secretSize,
- XXH64_hash_t seed64);
-/*! @copydoc XXH3_64bits_withSecretandSeed() */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_128bits_reset_withSecretandSeed(XXH_NOESCAPE XXH3_state_t* statePtr,
- XXH_NOESCAPE const void* secret, size_t secretSize,
- XXH64_hash_t seed64);
-#endif /* !XXH_NO_STREAM */
-
-#endif /* !XXH_NO_XXH3 */
-#endif /* XXH_NO_LONG_LONG */
-#if defined(XXH_INLINE_ALL) || defined(XXH_PRIVATE_API)
-# define XXH_IMPLEMENTATION
-#endif
-
-#endif /* defined(XXH_STATIC_LINKING_ONLY) && !defined(XXHASH_H_STATIC_13879238742) */
-
-
-/* ======================================================================== */
-/* ======================================================================== */
-/* ======================================================================== */
-
-
-/*-**********************************************************************
- * xxHash implementation
- *-**********************************************************************
- * xxHash's implementation used to be hosted inside xxhash.c.
- *
- * However, inlining requires implementation to be visible to the compiler,
- * hence be included alongside the header.
- * Previously, implementation was hosted inside xxhash.c,
- * which was then #included when inlining was activated.
- * This construction created issues with a few build and install systems,
- * as it required xxhash.c to be stored in /include directory.
- *
- * xxHash implementation is now directly integrated within xxhash.h.
- * As a consequence, xxhash.c is no longer needed in /include.
- *
- * xxhash.c is still available and is still useful.
- * In a "normal" setup, when xxhash is not inlined,
- * xxhash.h only exposes the prototypes and public symbols,
- * while xxhash.c can be built into an object file xxhash.o
- * which can then be linked into the final binary.
- ************************************************************************/
-
-#if ( defined(XXH_INLINE_ALL) || defined(XXH_PRIVATE_API) \
- || defined(XXH_IMPLEMENTATION) ) && !defined(XXH_IMPLEM_13a8737387)
-# define XXH_IMPLEM_13a8737387
-
-/* *************************************
-* Tuning parameters
-***************************************/
-
-/*!
- * @defgroup tuning Tuning parameters
- * @{
- *
- * Various macros to control xxHash's behavior.
- */
-#ifdef XXH_DOXYGEN
-/*!
- * @brief Define this to disable 64-bit code.
- *
- * Useful if only using the @ref XXH32_family and you have a strict C90 compiler.
- */
-# define XXH_NO_LONG_LONG
-# undef XXH_NO_LONG_LONG /* don't actually */
-/*!
- * @brief Controls how unaligned memory is accessed.
- *
- * By default, access to unaligned memory is controlled by `memcpy()`, which is
- * safe and portable.
- *
- * Unfortunately, on some target/compiler combinations, the generated assembly
- * is sub-optimal.
- *
- * The below switch allow selection of a different access method
- * in the search for improved performance.
- *
- * @par Possible options:
- *
- * - `XXH_FORCE_MEMORY_ACCESS=0` (default): `memcpy`
- * @par
- * Use `memcpy()`. Safe and portable. Note that most modern compilers will
- * eliminate the function call and treat it as an unaligned access.
- *
- * - `XXH_FORCE_MEMORY_ACCESS=1`: `__attribute__((aligned(1)))`
- * @par
- * Depends on compiler extensions and is therefore not portable.
- * This method is safe _if_ your compiler supports it,
- * and *generally* as fast or faster than `memcpy`.
- *
- * - `XXH_FORCE_MEMORY_ACCESS=2`: Direct cast
- * @par
- * Casts directly and dereferences. This method doesn't depend on the
- * compiler, but it violates the C standard as it directly dereferences an
- * unaligned pointer. It can generate buggy code on targets which do not
- * support unaligned memory accesses, but in some circumstances, it's the
- * only known way to get the most performance.
- *
- * - `XXH_FORCE_MEMORY_ACCESS=3`: Byteshift
- * @par
- * Also portable. This can generate the best code on old compilers which don't
- * inline small `memcpy()` calls, and it might also be faster on big-endian
- * systems which lack a native byteswap instruction. However, some compilers
- * will emit literal byteshifts even if the target supports unaligned access.
- *
- *
- * @warning
- * Methods 1 and 2 rely on implementation-defined behavior. Use these with
- * care, as what works on one compiler/platform/optimization level may cause
- * another to read garbage data or even crash.
- *
- * See https://fastcompression.blogspot.com/2015/08/accessing-unaligned-memory.html for details.
- *
- * Prefer these methods in priority order (0 > 3 > 1 > 2)
- */
-# define XXH_FORCE_MEMORY_ACCESS 0
-
-/*!
- * @def XXH_SIZE_OPT
- * @brief Controls how much xxHash optimizes for size.
- *
- * xxHash, when compiled, tends to result in a rather large binary size. This
- * is mostly due to heavy usage to forced inlining and constant folding of the
- * @ref XXH3_family to increase performance.
- *
- * However, some developers prefer size over speed. This option can
- * significantly reduce the size of the generated code. When using the `-Os`
- * or `-Oz` options on GCC or Clang, this is defined to 1 by default,
- * otherwise it is defined to 0.
- *
- * Most of these size optimizations can be controlled manually.
- *
- * This is a number from 0-2.
- * - `XXH_SIZE_OPT` == 0: Default. xxHash makes no size optimizations. Speed
- * comes first.
- * - `XXH_SIZE_OPT` == 1: Default for `-Os` and `-Oz`. xxHash is more
- * conservative and disables hacks that increase code size. It implies the
- * options @ref XXH_NO_INLINE_HINTS == 1, @ref XXH_FORCE_ALIGN_CHECK == 0,
- * and @ref XXH3_NEON_LANES == 8 if they are not already defined.
- * - `XXH_SIZE_OPT` == 2: xxHash tries to make itself as small as possible.
- * Performance may cry. For example, the single shot functions just use the
- * streaming API.
- */
-# define XXH_SIZE_OPT 0
-
-/*!
- * @def XXH_FORCE_ALIGN_CHECK
- * @brief If defined to non-zero, adds a special path for aligned inputs (XXH32()
- * and XXH64() only).
- *
- * This is an important performance trick for architectures without decent
- * unaligned memory access performance.
- *
- * It checks for input alignment, and when conditions are met, uses a "fast
- * path" employing direct 32-bit/64-bit reads, resulting in _dramatically
- * faster_ read speed.
- *
- * The check costs one initial branch per hash, which is generally negligible,
- * but not zero.
- *
- * Moreover, it's not useful to generate an additional code path if memory
- * access uses the same instruction for both aligned and unaligned
- * addresses (e.g. x86 and aarch64).
- *
- * In these cases, the alignment check can be removed by setting this macro to 0.
- * Then the code will always use unaligned memory access.
- * Align check is automatically disabled on x86, x64, ARM64, and some ARM chips
- * which are platforms known to offer good unaligned memory accesses performance.
- *
- * It is also disabled by default when @ref XXH_SIZE_OPT >= 1.
- *
- * This option does not affect XXH3 (only XXH32 and XXH64).
- */
-# define XXH_FORCE_ALIGN_CHECK 0
-
-/*!
- * @def XXH_NO_INLINE_HINTS
- * @brief When non-zero, sets all functions to `static`.
- *
- * By default, xxHash tries to force the compiler to inline almost all internal
- * functions.
- *
- * This can usually improve performance due to reduced jumping and improved
- * constant folding, but significantly increases the size of the binary which
- * might not be favorable.
- *
- * Additionally, sometimes the forced inlining can be detrimental to performance,
- * depending on the architecture.
- *
- * XXH_NO_INLINE_HINTS marks all internal functions as static, giving the
- * compiler full control on whether to inline or not.
- *
- * When not optimizing (-O0), using `-fno-inline` with GCC or Clang, or if
- * @ref XXH_SIZE_OPT >= 1, this will automatically be defined.
- */
-# define XXH_NO_INLINE_HINTS 0
-
-/*!
- * @def XXH3_INLINE_SECRET
- * @brief Determines whether to inline the XXH3 withSecret code.
- *
- * When the secret size is known, the compiler can improve the performance
- * of XXH3_64bits_withSecret() and XXH3_128bits_withSecret().
- *
- * However, if the secret size is not known, it doesn't have any benefit. This
- * happens when xxHash is compiled into a global symbol. Therefore, if
- * @ref XXH_INLINE_ALL is *not* defined, this will be defined to 0.
- *
- * Additionally, this defaults to 0 on GCC 12+, which has an issue with function pointers
- * that are *sometimes* force inline on -Og, and it is impossible to automatically
- * detect this optimization level.
- */
-# define XXH3_INLINE_SECRET 0
-
-/*!
- * @def XXH32_ENDJMP
- * @brief Whether to use a jump for `XXH32_finalize`.
- *
- * For performance, `XXH32_finalize` uses multiple branches in the finalizer.
- * This is generally preferable for performance,
- * but depending on exact architecture, a jmp may be preferable.
- *
- * This setting is only possibly making a difference for very small inputs.
- */
-# define XXH32_ENDJMP 0
-
-/*!
- * @internal
- * @brief Redefines old internal names.
- *
- * For compatibility with code that uses xxHash's internals before the names
- * were changed to improve namespacing. There is no other reason to use this.
- */
-# define XXH_OLD_NAMES
-# undef XXH_OLD_NAMES /* don't actually use, it is ugly. */
-
-/*!
- * @def XXH_NO_STREAM
- * @brief Disables the streaming API.
- *
- * When xxHash is not inlined and the streaming functions are not used, disabling
- * the streaming functions can improve code size significantly, especially with
- * the @ref XXH3_family which tends to make constant folded copies of itself.
- */
-# define XXH_NO_STREAM
-# undef XXH_NO_STREAM /* don't actually */
-#endif /* XXH_DOXYGEN */
-/*!
- * @}
- */
-
-#ifndef XXH_FORCE_MEMORY_ACCESS /* can be defined externally, on command line for example */
- /* prefer __packed__ structures (method 1) for GCC
- * < ARMv7 with unaligned access (e.g. Raspbian armhf) still uses byte shifting, so we use memcpy
- * which for some reason does unaligned loads. */
-# if defined(__GNUC__) && !(defined(__ARM_ARCH) && __ARM_ARCH < 7 && defined(__ARM_FEATURE_UNALIGNED))
-# define XXH_FORCE_MEMORY_ACCESS 1
-# endif
-#endif
-
-#ifndef XXH_SIZE_OPT
- /* default to 1 for -Os or -Oz */
-# if (defined(__GNUC__) || defined(__clang__)) && defined(__OPTIMIZE_SIZE__)
-# define XXH_SIZE_OPT 1
-# else
-# define XXH_SIZE_OPT 0
-# endif
-#endif
-
-#ifndef XXH_FORCE_ALIGN_CHECK /* can be defined externally */
- /* don't check on sizeopt, x86, aarch64, or arm when unaligned access is available */
-# if XXH_SIZE_OPT >= 1 || \
- defined(__i386) || defined(__x86_64__) || defined(__aarch64__) || defined(__ARM_FEATURE_UNALIGNED) \
- || defined(_M_IX86) || defined(_M_X64) || defined(_M_ARM64) || defined(_M_ARM) /* visual */
-# define XXH_FORCE_ALIGN_CHECK 0
-# else
-# define XXH_FORCE_ALIGN_CHECK 1
-# endif
-#endif
-
-#ifndef XXH_NO_INLINE_HINTS
-# if XXH_SIZE_OPT >= 1 || defined(__NO_INLINE__) /* -O0, -fno-inline */
-# define XXH_NO_INLINE_HINTS 1
-# else
-# define XXH_NO_INLINE_HINTS 0
-# endif
-#endif
-
-#ifndef XXH3_INLINE_SECRET
-# if (defined(__GNUC__) && !defined(__clang__) && __GNUC__ >= 12) \
- || !defined(XXH_INLINE_ALL)
-# define XXH3_INLINE_SECRET 0
-# else
-# define XXH3_INLINE_SECRET 1
-# endif
-#endif
-
-#ifndef XXH32_ENDJMP
-/* generally preferable for performance */
-# define XXH32_ENDJMP 0
-#endif
-
-/*!
- * @defgroup impl Implementation
- * @{
- */
-
-
-/* *************************************
-* Includes & Memory related functions
-***************************************/
-#if defined(XXH_NO_STREAM)
-/* nothing */
-#elif defined(XXH_NO_STDLIB)
-
-/* When requesting to disable any mention of stdlib,
- * the library loses the ability to invoked malloc / free.
- * In practice, it means that functions like `XXH*_createState()`
- * will always fail, and return NULL.
- * This flag is useful in situations where
- * xxhash.h is integrated into some kernel, embedded or limited environment
- * without access to dynamic allocation.
- */
-
-static XXH_CONSTF void* XXH_malloc(size_t s) { (void)s; return NULL; }
-static void XXH_free(void* p) { (void)p; }
-
-#else
-
-/*
- * Modify the local functions below should you wish to use
- * different memory routines for malloc() and free()
- */
-#include <stdlib.h>
-
-/*!
- * @internal
- * @brief Modify this function to use a different routine than malloc().
- */
-static XXH_MALLOCF void* XXH_malloc(size_t s) { return malloc(s); }
-
-/*!
- * @internal
- * @brief Modify this function to use a different routine than free().
- */
-static void XXH_free(void* p) { free(p); }
-
-#endif /* XXH_NO_STDLIB */
-
-#include <string.h>
-
-/*!
- * @internal
- * @brief Modify this function to use a different routine than memcpy().
- */
-static void* XXH_memcpy(void* dest, const void* src, size_t size)
-{
- return memcpy(dest,src,size);
-}
-
-#include <limits.h> /* ULLONG_MAX */
-
-
-/* *************************************
-* Compiler Specific Options
-***************************************/
-#ifdef _MSC_VER /* Visual Studio warning fix */
-# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
-#endif
-
-#if XXH_NO_INLINE_HINTS /* disable inlining hints */
-# if defined(__GNUC__) || defined(__clang__)
-# define XXH_FORCE_INLINE static __attribute__((unused))
-# else
-# define XXH_FORCE_INLINE static
-# endif
-# define XXH_NO_INLINE static
-/* enable inlining hints */
-#elif defined(__GNUC__) || defined(__clang__)
-# define XXH_FORCE_INLINE static __inline__ __attribute__((always_inline, unused))
-# define XXH_NO_INLINE static __attribute__((noinline))
-#elif defined(_MSC_VER) /* Visual Studio */
-# define XXH_FORCE_INLINE static __forceinline
-# define XXH_NO_INLINE static __declspec(noinline)
-#elif defined (__cplusplus) \
- || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) /* C99 */
-# define XXH_FORCE_INLINE static inline
-# define XXH_NO_INLINE static
-#else
-# define XXH_FORCE_INLINE static
-# define XXH_NO_INLINE static
-#endif
-
-#if XXH3_INLINE_SECRET
-# define XXH3_WITH_SECRET_INLINE XXH_FORCE_INLINE
-#else
-# define XXH3_WITH_SECRET_INLINE XXH_NO_INLINE
-#endif
-
-
-/* *************************************
-* Debug
-***************************************/
-/*!
- * @ingroup tuning
- * @def XXH_DEBUGLEVEL
- * @brief Sets the debugging level.
- *
- * XXH_DEBUGLEVEL is expected to be defined externally, typically via the
- * compiler's command line options. The value must be a number.
- */
-#ifndef XXH_DEBUGLEVEL
-# ifdef DEBUGLEVEL /* backwards compat */
-# define XXH_DEBUGLEVEL DEBUGLEVEL
-# else
-# define XXH_DEBUGLEVEL 0
-# endif
-#endif
-
-#if (XXH_DEBUGLEVEL>=1)
-# include <assert.h> /* note: can still be disabled with NDEBUG */
-# define XXH_ASSERT(c) assert(c)
-#else
-# if defined(__INTEL_COMPILER)
-# define XXH_ASSERT(c) XXH_ASSUME((unsigned char) (c))
-# else
-# define XXH_ASSERT(c) XXH_ASSUME(c)
-# endif
-#endif
-
-/* note: use after variable declarations */
-#ifndef XXH_STATIC_ASSERT
-# if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) /* C11 */
-# define XXH_STATIC_ASSERT_WITH_MESSAGE(c,m) do { _Static_assert((c),m); } while(0)
-# elif defined(__cplusplus) && (__cplusplus >= 201103L) /* C++11 */
-# define XXH_STATIC_ASSERT_WITH_MESSAGE(c,m) do { static_assert((c),m); } while(0)
-# else
-# define XXH_STATIC_ASSERT_WITH_MESSAGE(c,m) do { struct xxh_sa { char x[(c) ? 1 : -1]; }; } while(0)
-# endif
-# define XXH_STATIC_ASSERT(c) XXH_STATIC_ASSERT_WITH_MESSAGE((c),#c)
-#endif
-
-/*!
- * @internal
- * @def XXH_COMPILER_GUARD(var)
- * @brief Used to prevent unwanted optimizations for @p var.
- *
- * It uses an empty GCC inline assembly statement with a register constraint
- * which forces @p var into a general purpose register (eg eax, ebx, ecx
- * on x86) and marks it as modified.
- *
- * This is used in a few places to avoid unwanted autovectorization (e.g.
- * XXH32_round()). All vectorization we want is explicit via intrinsics,
- * and _usually_ isn't wanted elsewhere.
- *
- * We also use it to prevent unwanted constant folding for AArch64 in
- * XXH3_initCustomSecret_scalar().
- */
-#if defined(__GNUC__) || defined(__clang__)
-# define XXH_COMPILER_GUARD(var) __asm__("" : "+r" (var))
-#else
-# define XXH_COMPILER_GUARD(var) ((void)0)
-#endif
-
-/* Specifically for NEON vectors which use the "w" constraint, on
- * Clang. */
-#if defined(__clang__) && defined(__ARM_ARCH) && !defined(__wasm__)
-# define XXH_COMPILER_GUARD_CLANG_NEON(var) __asm__("" : "+w" (var))
-#else
-# define XXH_COMPILER_GUARD_CLANG_NEON(var) ((void)0)
-#endif
-
-/* *************************************
-* Basic Types
-***************************************/
-#if !defined (__VMS) \
- && (defined (__cplusplus) \
- || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
-# include <stdint.h>
- typedef uint8_t xxh_u8;
-#else
- typedef unsigned char xxh_u8;
-#endif
-typedef XXH32_hash_t xxh_u32;
-
-#ifdef XXH_OLD_NAMES
-# warning "XXH_OLD_NAMES is planned to be removed starting v0.9. If the program depends on it, consider moving away from it by employing newer type names directly"
-# define BYTE xxh_u8
-# define U8 xxh_u8
-# define U32 xxh_u32
-#endif
-
-/* *** Memory access *** */
-
-/*!
- * @internal
- * @fn xxh_u32 XXH_read32(const void* ptr)
- * @brief Reads an unaligned 32-bit integer from @p ptr in native endianness.
- *
- * Affected by @ref XXH_FORCE_MEMORY_ACCESS.
- *
- * @param ptr The pointer to read from.
- * @return The 32-bit native endian integer from the bytes at @p ptr.
- */
-
-/*!
- * @internal
- * @fn xxh_u32 XXH_readLE32(const void* ptr)
- * @brief Reads an unaligned 32-bit little endian integer from @p ptr.
- *
- * Affected by @ref XXH_FORCE_MEMORY_ACCESS.
- *
- * @param ptr The pointer to read from.
- * @return The 32-bit little endian integer from the bytes at @p ptr.
- */
-
-/*!
- * @internal
- * @fn xxh_u32 XXH_readBE32(const void* ptr)
- * @brief Reads an unaligned 32-bit big endian integer from @p ptr.
- *
- * Affected by @ref XXH_FORCE_MEMORY_ACCESS.
- *
- * @param ptr The pointer to read from.
- * @return The 32-bit big endian integer from the bytes at @p ptr.
- */
-
-/*!
- * @internal
- * @fn xxh_u32 XXH_readLE32_align(const void* ptr, XXH_alignment align)
- * @brief Like @ref XXH_readLE32(), but has an option for aligned reads.
- *
- * Affected by @ref XXH_FORCE_MEMORY_ACCESS.
- * Note that when @ref XXH_FORCE_ALIGN_CHECK == 0, the @p align parameter is
- * always @ref XXH_alignment::XXH_unaligned.
- *
- * @param ptr The pointer to read from.
- * @param align Whether @p ptr is aligned.
- * @pre
- * If @p align == @ref XXH_alignment::XXH_aligned, @p ptr must be 4 byte
- * aligned.
- * @return The 32-bit little endian integer from the bytes at @p ptr.
- */
-
-#if (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==3))
-/*
- * Manual byteshift. Best for old compilers which don't inline memcpy.
- * We actually directly use XXH_readLE32 and XXH_readBE32.
- */
-#elif (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==2))
-
-/*
- * Force direct memory access. Only works on CPU which support unaligned memory
- * access in hardware.
- */
-static xxh_u32 XXH_read32(const void* memPtr) { return *(const xxh_u32*) memPtr; }
-
-#elif (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==1))
-
-/*
- * __attribute__((aligned(1))) is supported by gcc and clang. Originally the
- * documentation claimed that it only increased the alignment, but actually it
- * can decrease it on gcc, clang, and icc:
- * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69502,
- * https://gcc.godbolt.org/z/xYez1j67Y.
- */
-#ifdef XXH_OLD_NAMES
-typedef union { xxh_u32 u32; } __attribute__((packed)) unalign;
-#endif
-static xxh_u32 XXH_read32(const void* ptr)
-{
- typedef __attribute__((aligned(1))) xxh_u32 xxh_unalign32;
- return *((const xxh_unalign32*)ptr);
-}
-
-#else
-
-/*
- * Portable and safe solution. Generally efficient.
- * see: https://fastcompression.blogspot.com/2015/08/accessing-unaligned-memory.html
- */
-static xxh_u32 XXH_read32(const void* memPtr)
-{
- xxh_u32 val;
- XXH_memcpy(&val, memPtr, sizeof(val));
- return val;
-}
-
-#endif /* XXH_FORCE_DIRECT_MEMORY_ACCESS */
-
-
-/* *** Endianness *** */
-
-/*!
- * @ingroup tuning
- * @def XXH_CPU_LITTLE_ENDIAN
- * @brief Whether the target is little endian.
- *
- * Defined to 1 if the target is little endian, or 0 if it is big endian.
- * It can be defined externally, for example on the compiler command line.
- *
- * If it is not defined,
- * a runtime check (which is usually constant folded) is used instead.
- *
- * @note
- * This is not necessarily defined to an integer constant.
- *
- * @see XXH_isLittleEndian() for the runtime check.
- */
-#ifndef XXH_CPU_LITTLE_ENDIAN
-/*
- * Try to detect endianness automatically, to avoid the nonstandard behavior
- * in `XXH_isLittleEndian()`
- */
-# if defined(_WIN32) /* Windows is always little endian */ \
- || defined(__LITTLE_ENDIAN__) \
- || (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
-# define XXH_CPU_LITTLE_ENDIAN 1
-# elif defined(__BIG_ENDIAN__) \
- || (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
-# define XXH_CPU_LITTLE_ENDIAN 0
-# else
-/*!
- * @internal
- * @brief Runtime check for @ref XXH_CPU_LITTLE_ENDIAN.
- *
- * Most compilers will constant fold this.
- */
-static int XXH_isLittleEndian(void)
-{
- /*
- * Portable and well-defined behavior.
- * Don't use static: it is detrimental to performance.
- */
- const union { xxh_u32 u; xxh_u8 c[4]; } one = { 1 };
- return one.c[0];
-}
-# define XXH_CPU_LITTLE_ENDIAN XXH_isLittleEndian()
-# endif
-#endif
-
-
-
-
-/* ****************************************
-* Compiler-specific Functions and Macros
-******************************************/
-#define XXH_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-
-#ifdef __has_builtin
-# define XXH_HAS_BUILTIN(x) __has_builtin(x)
-#else
-# define XXH_HAS_BUILTIN(x) 0
-#endif
-
-
-
-/*
- * C23 and future versions have standard "unreachable()".
- * Once it has been implemented reliably we can add it as an
- * additional case:
- *
- * ```
- * #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= XXH_C23_VN)
- * # include <stddef.h>
- * # ifdef unreachable
- * # define XXH_UNREACHABLE() unreachable()
- * # endif
- * #endif
- * ```
- *
- * Note C++23 also has std::unreachable() which can be detected
- * as follows:
- * ```
- * #if defined(__cpp_lib_unreachable) && (__cpp_lib_unreachable >= 202202L)
- * # include <utility>
- * # define XXH_UNREACHABLE() std::unreachable()
- * #endif
- * ```
- * NB: `__cpp_lib_unreachable` is defined in the `<version>` header.
- * We don't use that as including `<utility>` in `extern "C"` blocks
- * doesn't work on GCC12
- */
-
-#if XXH_HAS_BUILTIN(__builtin_unreachable)
-# define XXH_UNREACHABLE() __builtin_unreachable()
-
-#elif defined(_MSC_VER)
-# define XXH_UNREACHABLE() __assume(0)
-
-#else
-# define XXH_UNREACHABLE()
-#endif
-
-#if XXH_HAS_BUILTIN(__builtin_assume)
-# define XXH_ASSUME(c) __builtin_assume(c)
-#else
-# define XXH_ASSUME(c) if (!(c)) { XXH_UNREACHABLE(); }
-#endif
-
-/*!
- * @internal
- * @def XXH_rotl32(x,r)
- * @brief 32-bit rotate left.
- *
- * @param x The 32-bit integer to be rotated.
- * @param r The number of bits to rotate.
- * @pre
- * @p r > 0 && @p r < 32
- * @note
- * @p x and @p r may be evaluated multiple times.
- * @return The rotated result.
- */
-#if !defined(NO_CLANG_BUILTIN) && XXH_HAS_BUILTIN(__builtin_rotateleft32) \
- && XXH_HAS_BUILTIN(__builtin_rotateleft64)
-# define XXH_rotl32 __builtin_rotateleft32
-# define XXH_rotl64 __builtin_rotateleft64
-/* Note: although _rotl exists for minGW (GCC under windows), performance seems poor */
-#elif defined(_MSC_VER)
-# define XXH_rotl32(x,r) _rotl(x,r)
-# define XXH_rotl64(x,r) _rotl64(x,r)
-#else
-# define XXH_rotl32(x,r) (((x) << (r)) | ((x) >> (32 - (r))))
-# define XXH_rotl64(x,r) (((x) << (r)) | ((x) >> (64 - (r))))
-#endif
-
-/*!
- * @internal
- * @fn xxh_u32 XXH_swap32(xxh_u32 x)
- * @brief A 32-bit byteswap.
- *
- * @param x The 32-bit integer to byteswap.
- * @return @p x, byteswapped.
- */
-#if defined(_MSC_VER) /* Visual Studio */
-# define XXH_swap32 _byteswap_ulong
-#elif XXH_GCC_VERSION >= 403
-# define XXH_swap32 __builtin_bswap32
-#else
-static xxh_u32 XXH_swap32 (xxh_u32 x)
-{
- return ((x << 24) & 0xff000000 ) |
- ((x << 8) & 0x00ff0000 ) |
- ((x >> 8) & 0x0000ff00 ) |
- ((x >> 24) & 0x000000ff );
-}
-#endif
-
-
-/* ***************************
-* Memory reads
-*****************************/
-
-/*!
- * @internal
- * @brief Enum to indicate whether a pointer is aligned.
- */
-typedef enum {
- XXH_aligned, /*!< Aligned */
- XXH_unaligned /*!< Possibly unaligned */
-} XXH_alignment;
-
-/*
- * XXH_FORCE_MEMORY_ACCESS==3 is an endian-independent byteshift load.
- *
- * This is ideal for older compilers which don't inline memcpy.
- */
-#if (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==3))
-
-XXH_FORCE_INLINE xxh_u32 XXH_readLE32(const void* memPtr)
-{
- const xxh_u8* bytePtr = (const xxh_u8 *)memPtr;
- return bytePtr[0]
- | ((xxh_u32)bytePtr[1] << 8)
- | ((xxh_u32)bytePtr[2] << 16)
- | ((xxh_u32)bytePtr[3] << 24);
-}
-
-XXH_FORCE_INLINE xxh_u32 XXH_readBE32(const void* memPtr)
-{
- const xxh_u8* bytePtr = (const xxh_u8 *)memPtr;
- return bytePtr[3]
- | ((xxh_u32)bytePtr[2] << 8)
- | ((xxh_u32)bytePtr[1] << 16)
- | ((xxh_u32)bytePtr[0] << 24);
-}
-
-#else
-XXH_FORCE_INLINE xxh_u32 XXH_readLE32(const void* ptr)
-{
- return XXH_CPU_LITTLE_ENDIAN ? XXH_read32(ptr) : XXH_swap32(XXH_read32(ptr));
-}
-
-static xxh_u32 XXH_readBE32(const void* ptr)
-{
- return XXH_CPU_LITTLE_ENDIAN ? XXH_swap32(XXH_read32(ptr)) : XXH_read32(ptr);
-}
-#endif
-
-XXH_FORCE_INLINE xxh_u32
-XXH_readLE32_align(const void* ptr, XXH_alignment align)
-{
- if (align==XXH_unaligned) {
- return XXH_readLE32(ptr);
- } else {
- return XXH_CPU_LITTLE_ENDIAN ? *(const xxh_u32*)ptr : XXH_swap32(*(const xxh_u32*)ptr);
- }
-}
-
-
-/* *************************************
-* Misc
-***************************************/
-/*! @ingroup public */
-XXH_PUBLIC_API unsigned XXH_versionNumber (void) { return XXH_VERSION_NUMBER; }
-
-
-/* *******************************************************************
-* 32-bit hash functions
-*********************************************************************/
-/*!
- * @}
- * @defgroup XXH32_impl XXH32 implementation
- * @ingroup impl
- *
- * Details on the XXH32 implementation.
- * @{
- */
- /* #define instead of static const, to be used as initializers */
-#define XXH_PRIME32_1 0x9E3779B1U /*!< 0b10011110001101110111100110110001 */
-#define XXH_PRIME32_2 0x85EBCA77U /*!< 0b10000101111010111100101001110111 */
-#define XXH_PRIME32_3 0xC2B2AE3DU /*!< 0b11000010101100101010111000111101 */
-#define XXH_PRIME32_4 0x27D4EB2FU /*!< 0b00100111110101001110101100101111 */
-#define XXH_PRIME32_5 0x165667B1U /*!< 0b00010110010101100110011110110001 */
-
-#ifdef XXH_OLD_NAMES
-# define PRIME32_1 XXH_PRIME32_1
-# define PRIME32_2 XXH_PRIME32_2
-# define PRIME32_3 XXH_PRIME32_3
-# define PRIME32_4 XXH_PRIME32_4
-# define PRIME32_5 XXH_PRIME32_5
-#endif
-
-/*!
- * @internal
- * @brief Normal stripe processing routine.
- *
- * This shuffles the bits so that any bit from @p input impacts several bits in
- * @p acc.
- *
- * @param acc The accumulator lane.
- * @param input The stripe of input to mix.
- * @return The mixed accumulator lane.
- */
-static xxh_u32 XXH32_round(xxh_u32 acc, xxh_u32 input)
-{
- acc += input * XXH_PRIME32_2;
- acc = XXH_rotl32(acc, 13);
- acc *= XXH_PRIME32_1;
-#if (defined(__SSE4_1__) || defined(__aarch64__) || defined(__wasm_simd128__)) && !defined(XXH_ENABLE_AUTOVECTORIZE)
- /*
- * UGLY HACK:
- * A compiler fence is the only thing that prevents GCC and Clang from
- * autovectorizing the XXH32 loop (pragmas and attributes don't work for some
- * reason) without globally disabling SSE4.1.
- *
- * The reason we want to avoid vectorization is because despite working on
- * 4 integers at a time, there are multiple factors slowing XXH32 down on
- * SSE4:
- * - There's a ridiculous amount of lag from pmulld (10 cycles of latency on
- * newer chips!) making it slightly slower to multiply four integers at
- * once compared to four integers independently. Even when pmulld was
- * fastest, Sandy/Ivy Bridge, it is still not worth it to go into SSE
- * just to multiply unless doing a long operation.
- *
- * - Four instructions are required to rotate,
- * movqda tmp, v // not required with VEX encoding
- * pslld tmp, 13 // tmp <<= 13
- * psrld v, 19 // x >>= 19
- * por v, tmp // x |= tmp
- * compared to one for scalar:
- * roll v, 13 // reliably fast across the board
- * shldl v, v, 13 // Sandy Bridge and later prefer this for some reason
- *
- * - Instruction level parallelism is actually more beneficial here because
- * the SIMD actually serializes this operation: While v1 is rotating, v2
- * can load data, while v3 can multiply. SSE forces them to operate
- * together.
- *
- * This is also enabled on AArch64, as Clang is *very aggressive* in vectorizing
- * the loop. NEON is only faster on the A53, and with the newer cores, it is less
- * than half the speed.
- *
- * Additionally, this is used on WASM SIMD128 because it JITs to the same
- * SIMD instructions and has the same issue.
- */
- XXH_COMPILER_GUARD(acc);
-#endif
- return acc;
-}
-
-/*!
- * @internal
- * @brief Mixes all bits to finalize the hash.
- *
- * The final mix ensures that all input bits have a chance to impact any bit in
- * the output digest, resulting in an unbiased distribution.
- *
- * @param hash The hash to avalanche.
- * @return The avalanched hash.
- */
-static xxh_u32 XXH32_avalanche(xxh_u32 hash)
-{
- hash ^= hash >> 15;
- hash *= XXH_PRIME32_2;
- hash ^= hash >> 13;
- hash *= XXH_PRIME32_3;
- hash ^= hash >> 16;
- return hash;
-}
-
-#define XXH_get32bits(p) XXH_readLE32_align(p, align)
-
-/*!
- * @internal
- * @brief Processes the last 0-15 bytes of @p ptr.
- *
- * There may be up to 15 bytes remaining to consume from the input.
- * This final stage will digest them to ensure that all input bytes are present
- * in the final mix.
- *
- * @param hash The hash to finalize.
- * @param ptr The pointer to the remaining input.
- * @param len The remaining length, modulo 16.
- * @param align Whether @p ptr is aligned.
- * @return The finalized hash.
- * @see XXH64_finalize().
- */
-static XXH_PUREF xxh_u32
-XXH32_finalize(xxh_u32 hash, const xxh_u8* ptr, size_t len, XXH_alignment align)
-{
-#define XXH_PROCESS1 do { \
- hash += (*ptr++) * XXH_PRIME32_5; \
- hash = XXH_rotl32(hash, 11) * XXH_PRIME32_1; \
-} while (0)
-
-#define XXH_PROCESS4 do { \
- hash += XXH_get32bits(ptr) * XXH_PRIME32_3; \
- ptr += 4; \
- hash = XXH_rotl32(hash, 17) * XXH_PRIME32_4; \
-} while (0)
-
- if (ptr==NULL) XXH_ASSERT(len == 0);
-
- /* Compact rerolled version; generally faster */
- if (!XXH32_ENDJMP) {
- len &= 15;
- while (len >= 4) {
- XXH_PROCESS4;
- len -= 4;
- }
- while (len > 0) {
- XXH_PROCESS1;
- --len;
- }
- return XXH32_avalanche(hash);
- } else {
- switch(len&15) /* or switch(bEnd - p) */ {
- case 12: XXH_PROCESS4;
- XXH_FALLTHROUGH; /* fallthrough */
- case 8: XXH_PROCESS4;
- XXH_FALLTHROUGH; /* fallthrough */
- case 4: XXH_PROCESS4;
- return XXH32_avalanche(hash);
-
- case 13: XXH_PROCESS4;
- XXH_FALLTHROUGH; /* fallthrough */
- case 9: XXH_PROCESS4;
- XXH_FALLTHROUGH; /* fallthrough */
- case 5: XXH_PROCESS4;
- XXH_PROCESS1;
- return XXH32_avalanche(hash);
-
- case 14: XXH_PROCESS4;
- XXH_FALLTHROUGH; /* fallthrough */
- case 10: XXH_PROCESS4;
- XXH_FALLTHROUGH; /* fallthrough */
- case 6: XXH_PROCESS4;
- XXH_PROCESS1;
- XXH_PROCESS1;
- return XXH32_avalanche(hash);
-
- case 15: XXH_PROCESS4;
- XXH_FALLTHROUGH; /* fallthrough */
- case 11: XXH_PROCESS4;
- XXH_FALLTHROUGH; /* fallthrough */
- case 7: XXH_PROCESS4;
- XXH_FALLTHROUGH; /* fallthrough */
- case 3: XXH_PROCESS1;
- XXH_FALLTHROUGH; /* fallthrough */
- case 2: XXH_PROCESS1;
- XXH_FALLTHROUGH; /* fallthrough */
- case 1: XXH_PROCESS1;
- XXH_FALLTHROUGH; /* fallthrough */
- case 0: return XXH32_avalanche(hash);
- }
- XXH_ASSERT(0);
- return hash; /* reaching this point is deemed impossible */
- }
-}
-
-#ifdef XXH_OLD_NAMES
-# define PROCESS1 XXH_PROCESS1
-# define PROCESS4 XXH_PROCESS4
-#else
-# undef XXH_PROCESS1
-# undef XXH_PROCESS4
-#endif
-
-/*!
- * @internal
- * @brief The implementation for @ref XXH32().
- *
- * @param input , len , seed Directly passed from @ref XXH32().
- * @param align Whether @p input is aligned.
- * @return The calculated hash.
- */
-XXH_FORCE_INLINE XXH_PUREF xxh_u32
-XXH32_endian_align(const xxh_u8* input, size_t len, xxh_u32 seed, XXH_alignment align)
-{
- xxh_u32 h32;
-
- if (input==NULL) XXH_ASSERT(len == 0);
-
- if (len>=16) {
- const xxh_u8* const bEnd = input + len;
- const xxh_u8* const limit = bEnd - 15;
- xxh_u32 v1 = seed + XXH_PRIME32_1 + XXH_PRIME32_2;
- xxh_u32 v2 = seed + XXH_PRIME32_2;
- xxh_u32 v3 = seed + 0;
- xxh_u32 v4 = seed - XXH_PRIME32_1;
-
- do {
- v1 = XXH32_round(v1, XXH_get32bits(input)); input += 4;
- v2 = XXH32_round(v2, XXH_get32bits(input)); input += 4;
- v3 = XXH32_round(v3, XXH_get32bits(input)); input += 4;
- v4 = XXH32_round(v4, XXH_get32bits(input)); input += 4;
- } while (input < limit);
-
- h32 = XXH_rotl32(v1, 1) + XXH_rotl32(v2, 7)
- + XXH_rotl32(v3, 12) + XXH_rotl32(v4, 18);
- } else {
- h32 = seed + XXH_PRIME32_5;
- }
-
- h32 += (xxh_u32)len;
-
- return XXH32_finalize(h32, input, len&15, align);
-}
-
-/*! @ingroup XXH32_family */
-XXH_PUBLIC_API XXH32_hash_t XXH32 (const void* input, size_t len, XXH32_hash_t seed)
-{
-#if !defined(XXH_NO_STREAM) && XXH_SIZE_OPT >= 2
- /* Simple version, good for code maintenance, but unfortunately slow for small inputs */
- XXH32_state_t state;
- XXH32_reset(&state, seed);
- XXH32_update(&state, (const xxh_u8*)input, len);
- return XXH32_digest(&state);
-#else
- if (XXH_FORCE_ALIGN_CHECK) {
- if ((((size_t)input) & 3) == 0) { /* Input is 4-bytes aligned, leverage the speed benefit */
- return XXH32_endian_align((const xxh_u8*)input, len, seed, XXH_aligned);
- } }
-
- return XXH32_endian_align((const xxh_u8*)input, len, seed, XXH_unaligned);
-#endif
-}
-
-
-
-/******* Hash streaming *******/
-#ifndef XXH_NO_STREAM
-/*! @ingroup XXH32_family */
-XXH_PUBLIC_API XXH32_state_t* XXH32_createState(void)
-{
- return (XXH32_state_t*)XXH_malloc(sizeof(XXH32_state_t));
-}
-/*! @ingroup XXH32_family */
-XXH_PUBLIC_API XXH_errorcode XXH32_freeState(XXH32_state_t* statePtr)
-{
- XXH_free(statePtr);
- return XXH_OK;
-}
-
-/*! @ingroup XXH32_family */
-XXH_PUBLIC_API void XXH32_copyState(XXH32_state_t* dstState, const XXH32_state_t* srcState)
-{
- XXH_memcpy(dstState, srcState, sizeof(*dstState));
-}
-
-/*! @ingroup XXH32_family */
-XXH_PUBLIC_API XXH_errorcode XXH32_reset(XXH32_state_t* statePtr, XXH32_hash_t seed)
-{
- XXH_ASSERT(statePtr != NULL);
- memset(statePtr, 0, sizeof(*statePtr));
- statePtr->v[0] = seed + XXH_PRIME32_1 + XXH_PRIME32_2;
- statePtr->v[1] = seed + XXH_PRIME32_2;
- statePtr->v[2] = seed + 0;
- statePtr->v[3] = seed - XXH_PRIME32_1;
- return XXH_OK;
-}
-
-
-/*! @ingroup XXH32_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH32_update(XXH32_state_t* state, const void* input, size_t len)
-{
- if (input==NULL) {
- XXH_ASSERT(len == 0);
- return XXH_OK;
- }
-
- { const xxh_u8* p = (const xxh_u8*)input;
- const xxh_u8* const bEnd = p + len;
-
- state->total_len_32 += (XXH32_hash_t)len;
- state->large_len |= (XXH32_hash_t)((len>=16) | (state->total_len_32>=16));
-
- if (state->memsize + len < 16) { /* fill in tmp buffer */
- XXH_memcpy((xxh_u8*)(state->mem32) + state->memsize, input, len);
- state->memsize += (XXH32_hash_t)len;
- return XXH_OK;
- }
-
- if (state->memsize) { /* some data left from previous update */
- XXH_memcpy((xxh_u8*)(state->mem32) + state->memsize, input, 16-state->memsize);
- { const xxh_u32* p32 = state->mem32;
- state->v[0] = XXH32_round(state->v[0], XXH_readLE32(p32)); p32++;
- state->v[1] = XXH32_round(state->v[1], XXH_readLE32(p32)); p32++;
- state->v[2] = XXH32_round(state->v[2], XXH_readLE32(p32)); p32++;
- state->v[3] = XXH32_round(state->v[3], XXH_readLE32(p32));
- }
- p += 16-state->memsize;
- state->memsize = 0;
- }
-
- if (p <= bEnd-16) {
- const xxh_u8* const limit = bEnd - 16;
-
- do {
- state->v[0] = XXH32_round(state->v[0], XXH_readLE32(p)); p+=4;
- state->v[1] = XXH32_round(state->v[1], XXH_readLE32(p)); p+=4;
- state->v[2] = XXH32_round(state->v[2], XXH_readLE32(p)); p+=4;
- state->v[3] = XXH32_round(state->v[3], XXH_readLE32(p)); p+=4;
- } while (p<=limit);
-
- }
-
- if (p < bEnd) {
- XXH_memcpy(state->mem32, p, (size_t)(bEnd-p));
- state->memsize = (unsigned)(bEnd-p);
- }
- }
-
- return XXH_OK;
-}
-
-
-/*! @ingroup XXH32_family */
-XXH_PUBLIC_API XXH32_hash_t XXH32_digest(const XXH32_state_t* state)
-{
- xxh_u32 h32;
-
- if (state->large_len) {
- h32 = XXH_rotl32(state->v[0], 1)
- + XXH_rotl32(state->v[1], 7)
- + XXH_rotl32(state->v[2], 12)
- + XXH_rotl32(state->v[3], 18);
- } else {
- h32 = state->v[2] /* == seed */ + XXH_PRIME32_5;
- }
-
- h32 += state->total_len_32;
-
- return XXH32_finalize(h32, (const xxh_u8*)state->mem32, state->memsize, XXH_aligned);
-}
-#endif /* !XXH_NO_STREAM */
-
-/******* Canonical representation *******/
-
-/*!
- * @ingroup XXH32_family
- * The default return values from XXH functions are unsigned 32 and 64 bit
- * integers.
- *
- * The canonical representation uses big endian convention, the same convention
- * as human-readable numbers (large digits first).
- *
- * This way, hash values can be written into a file or buffer, remaining
- * comparable across different systems.
- *
- * The following functions allow transformation of hash values to and from their
- * canonical format.
- */
-XXH_PUBLIC_API void XXH32_canonicalFromHash(XXH32_canonical_t* dst, XXH32_hash_t hash)
-{
- XXH_STATIC_ASSERT(sizeof(XXH32_canonical_t) == sizeof(XXH32_hash_t));
- if (XXH_CPU_LITTLE_ENDIAN) hash = XXH_swap32(hash);
- XXH_memcpy(dst, &hash, sizeof(*dst));
-}
-/*! @ingroup XXH32_family */
-XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical(const XXH32_canonical_t* src)
-{
- return XXH_readBE32(src);
-}
-
-
-#ifndef XXH_NO_LONG_LONG
-
-/* *******************************************************************
-* 64-bit hash functions
-*********************************************************************/
-/*!
- * @}
- * @ingroup impl
- * @{
- */
-/******* Memory access *******/
-
-typedef XXH64_hash_t xxh_u64;
-
-#ifdef XXH_OLD_NAMES
-# define U64 xxh_u64
-#endif
-
-#if (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==3))
-/*
- * Manual byteshift. Best for old compilers which don't inline memcpy.
- * We actually directly use XXH_readLE64 and XXH_readBE64.
- */
-#elif (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==2))
-
-/* Force direct memory access. Only works on CPU which support unaligned memory access in hardware */
-static xxh_u64 XXH_read64(const void* memPtr)
-{
- return *(const xxh_u64*) memPtr;
-}
-
-#elif (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==1))
-
-/*
- * __attribute__((aligned(1))) is supported by gcc and clang. Originally the
- * documentation claimed that it only increased the alignment, but actually it
- * can decrease it on gcc, clang, and icc:
- * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69502,
- * https://gcc.godbolt.org/z/xYez1j67Y.
- */
-#ifdef XXH_OLD_NAMES
-typedef union { xxh_u32 u32; xxh_u64 u64; } __attribute__((packed)) unalign64;
-#endif
-static xxh_u64 XXH_read64(const void* ptr)
-{
- typedef __attribute__((aligned(1))) xxh_u64 xxh_unalign64;
- return *((const xxh_unalign64*)ptr);
-}
-
-#else
-
-/*
- * Portable and safe solution. Generally efficient.
- * see: https://fastcompression.blogspot.com/2015/08/accessing-unaligned-memory.html
- */
-static xxh_u64 XXH_read64(const void* memPtr)
-{
- xxh_u64 val;
- XXH_memcpy(&val, memPtr, sizeof(val));
- return val;
-}
-
-#endif /* XXH_FORCE_DIRECT_MEMORY_ACCESS */
-
-#if defined(_MSC_VER) /* Visual Studio */
-# define XXH_swap64 _byteswap_uint64
-#elif XXH_GCC_VERSION >= 403
-# define XXH_swap64 __builtin_bswap64
-#else
-static xxh_u64 XXH_swap64(xxh_u64 x)
-{
- return ((x << 56) & 0xff00000000000000ULL) |
- ((x << 40) & 0x00ff000000000000ULL) |
- ((x << 24) & 0x0000ff0000000000ULL) |
- ((x << 8) & 0x000000ff00000000ULL) |
- ((x >> 8) & 0x00000000ff000000ULL) |
- ((x >> 24) & 0x0000000000ff0000ULL) |
- ((x >> 40) & 0x000000000000ff00ULL) |
- ((x >> 56) & 0x00000000000000ffULL);
-}
-#endif
-
-
-/* XXH_FORCE_MEMORY_ACCESS==3 is an endian-independent byteshift load. */
-#if (defined(XXH_FORCE_MEMORY_ACCESS) && (XXH_FORCE_MEMORY_ACCESS==3))
-
-XXH_FORCE_INLINE xxh_u64 XXH_readLE64(const void* memPtr)
-{
- const xxh_u8* bytePtr = (const xxh_u8 *)memPtr;
- return bytePtr[0]
- | ((xxh_u64)bytePtr[1] << 8)
- | ((xxh_u64)bytePtr[2] << 16)
- | ((xxh_u64)bytePtr[3] << 24)
- | ((xxh_u64)bytePtr[4] << 32)
- | ((xxh_u64)bytePtr[5] << 40)
- | ((xxh_u64)bytePtr[6] << 48)
- | ((xxh_u64)bytePtr[7] << 56);
-}
-
-XXH_FORCE_INLINE xxh_u64 XXH_readBE64(const void* memPtr)
-{
- const xxh_u8* bytePtr = (const xxh_u8 *)memPtr;
- return bytePtr[7]
- | ((xxh_u64)bytePtr[6] << 8)
- | ((xxh_u64)bytePtr[5] << 16)
- | ((xxh_u64)bytePtr[4] << 24)
- | ((xxh_u64)bytePtr[3] << 32)
- | ((xxh_u64)bytePtr[2] << 40)
- | ((xxh_u64)bytePtr[1] << 48)
- | ((xxh_u64)bytePtr[0] << 56);
-}
-
-#else
-XXH_FORCE_INLINE xxh_u64 XXH_readLE64(const void* ptr)
-{
- return XXH_CPU_LITTLE_ENDIAN ? XXH_read64(ptr) : XXH_swap64(XXH_read64(ptr));
-}
-
-static xxh_u64 XXH_readBE64(const void* ptr)
-{
- return XXH_CPU_LITTLE_ENDIAN ? XXH_swap64(XXH_read64(ptr)) : XXH_read64(ptr);
-}
-#endif
-
-XXH_FORCE_INLINE xxh_u64
-XXH_readLE64_align(const void* ptr, XXH_alignment align)
-{
- if (align==XXH_unaligned)
- return XXH_readLE64(ptr);
- else
- return XXH_CPU_LITTLE_ENDIAN ? *(const xxh_u64*)ptr : XXH_swap64(*(const xxh_u64*)ptr);
-}
-
-
-/******* xxh64 *******/
-/*!
- * @}
- * @defgroup XXH64_impl XXH64 implementation
- * @ingroup impl
- *
- * Details on the XXH64 implementation.
- * @{
- */
-/* #define rather that static const, to be used as initializers */
-#define XXH_PRIME64_1 0x9E3779B185EBCA87ULL /*!< 0b1001111000110111011110011011000110000101111010111100101010000111 */
-#define XXH_PRIME64_2 0xC2B2AE3D27D4EB4FULL /*!< 0b1100001010110010101011100011110100100111110101001110101101001111 */
-#define XXH_PRIME64_3 0x165667B19E3779F9ULL /*!< 0b0001011001010110011001111011000110011110001101110111100111111001 */
-#define XXH_PRIME64_4 0x85EBCA77C2B2AE63ULL /*!< 0b1000010111101011110010100111011111000010101100101010111001100011 */
-#define XXH_PRIME64_5 0x27D4EB2F165667C5ULL /*!< 0b0010011111010100111010110010111100010110010101100110011111000101 */
-
-#ifdef XXH_OLD_NAMES
-# define PRIME64_1 XXH_PRIME64_1
-# define PRIME64_2 XXH_PRIME64_2
-# define PRIME64_3 XXH_PRIME64_3
-# define PRIME64_4 XXH_PRIME64_4
-# define PRIME64_5 XXH_PRIME64_5
-#endif
-
-/*! @copydoc XXH32_round */
-static xxh_u64 XXH64_round(xxh_u64 acc, xxh_u64 input)
-{
- acc += input * XXH_PRIME64_2;
- acc = XXH_rotl64(acc, 31);
- acc *= XXH_PRIME64_1;
- return acc;
-}
-
-static xxh_u64 XXH64_mergeRound(xxh_u64 acc, xxh_u64 val)
-{
- val = XXH64_round(0, val);
- acc ^= val;
- acc = acc * XXH_PRIME64_1 + XXH_PRIME64_4;
- return acc;
-}
-
-/*! @copydoc XXH32_avalanche */
-static xxh_u64 XXH64_avalanche(xxh_u64 hash)
-{
- hash ^= hash >> 33;
- hash *= XXH_PRIME64_2;
- hash ^= hash >> 29;
- hash *= XXH_PRIME64_3;
- hash ^= hash >> 32;
- return hash;
-}
-
-
-#define XXH_get64bits(p) XXH_readLE64_align(p, align)
-
-/*!
- * @internal
- * @brief Processes the last 0-31 bytes of @p ptr.
- *
- * There may be up to 31 bytes remaining to consume from the input.
- * This final stage will digest them to ensure that all input bytes are present
- * in the final mix.
- *
- * @param hash The hash to finalize.
- * @param ptr The pointer to the remaining input.
- * @param len The remaining length, modulo 32.
- * @param align Whether @p ptr is aligned.
- * @return The finalized hash
- * @see XXH32_finalize().
- */
-static XXH_PUREF xxh_u64
-XXH64_finalize(xxh_u64 hash, const xxh_u8* ptr, size_t len, XXH_alignment align)
-{
- if (ptr==NULL) XXH_ASSERT(len == 0);
- len &= 31;
- while (len >= 8) {
- xxh_u64 const k1 = XXH64_round(0, XXH_get64bits(ptr));
- ptr += 8;
- hash ^= k1;
- hash = XXH_rotl64(hash,27) * XXH_PRIME64_1 + XXH_PRIME64_4;
- len -= 8;
- }
- if (len >= 4) {
- hash ^= (xxh_u64)(XXH_get32bits(ptr)) * XXH_PRIME64_1;
- ptr += 4;
- hash = XXH_rotl64(hash, 23) * XXH_PRIME64_2 + XXH_PRIME64_3;
- len -= 4;
- }
- while (len > 0) {
- hash ^= (*ptr++) * XXH_PRIME64_5;
- hash = XXH_rotl64(hash, 11) * XXH_PRIME64_1;
- --len;
- }
- return XXH64_avalanche(hash);
-}
-
-#ifdef XXH_OLD_NAMES
-# define PROCESS1_64 XXH_PROCESS1_64
-# define PROCESS4_64 XXH_PROCESS4_64
-# define PROCESS8_64 XXH_PROCESS8_64
-#else
-# undef XXH_PROCESS1_64
-# undef XXH_PROCESS4_64
-# undef XXH_PROCESS8_64
-#endif
-
-/*!
- * @internal
- * @brief The implementation for @ref XXH64().
- *
- * @param input , len , seed Directly passed from @ref XXH64().
- * @param align Whether @p input is aligned.
- * @return The calculated hash.
- */
-XXH_FORCE_INLINE XXH_PUREF xxh_u64
-XXH64_endian_align(const xxh_u8* input, size_t len, xxh_u64 seed, XXH_alignment align)
-{
- xxh_u64 h64;
- if (input==NULL) XXH_ASSERT(len == 0);
-
- if (len>=32) {
- const xxh_u8* const bEnd = input + len;
- const xxh_u8* const limit = bEnd - 31;
- xxh_u64 v1 = seed + XXH_PRIME64_1 + XXH_PRIME64_2;
- xxh_u64 v2 = seed + XXH_PRIME64_2;
- xxh_u64 v3 = seed + 0;
- xxh_u64 v4 = seed - XXH_PRIME64_1;
-
- do {
- v1 = XXH64_round(v1, XXH_get64bits(input)); input+=8;
- v2 = XXH64_round(v2, XXH_get64bits(input)); input+=8;
- v3 = XXH64_round(v3, XXH_get64bits(input)); input+=8;
- v4 = XXH64_round(v4, XXH_get64bits(input)); input+=8;
- } while (input<limit);
-
- h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18);
- h64 = XXH64_mergeRound(h64, v1);
- h64 = XXH64_mergeRound(h64, v2);
- h64 = XXH64_mergeRound(h64, v3);
- h64 = XXH64_mergeRound(h64, v4);
-
- } else {
- h64 = seed + XXH_PRIME64_5;
- }
-
- h64 += (xxh_u64) len;
-
- return XXH64_finalize(h64, input, len, align);
-}
-
-
-/*! @ingroup XXH64_family */
-XXH_PUBLIC_API XXH64_hash_t XXH64 (XXH_NOESCAPE const void* input, size_t len, XXH64_hash_t seed)
-{
-#if !defined(XXH_NO_STREAM) && XXH_SIZE_OPT >= 2
- /* Simple version, good for code maintenance, but unfortunately slow for small inputs */
- XXH64_state_t state;
- XXH64_reset(&state, seed);
- XXH64_update(&state, (const xxh_u8*)input, len);
- return XXH64_digest(&state);
-#else
- if (XXH_FORCE_ALIGN_CHECK) {
- if ((((size_t)input) & 7)==0) { /* Input is aligned, let's leverage the speed advantage */
- return XXH64_endian_align((const xxh_u8*)input, len, seed, XXH_aligned);
- } }
-
- return XXH64_endian_align((const xxh_u8*)input, len, seed, XXH_unaligned);
-
-#endif
-}
-
-/******* Hash Streaming *******/
-#ifndef XXH_NO_STREAM
-/*! @ingroup XXH64_family*/
-XXH_PUBLIC_API XXH64_state_t* XXH64_createState(void)
-{
- return (XXH64_state_t*)XXH_malloc(sizeof(XXH64_state_t));
-}
-/*! @ingroup XXH64_family */
-XXH_PUBLIC_API XXH_errorcode XXH64_freeState(XXH64_state_t* statePtr)
-{
- XXH_free(statePtr);
- return XXH_OK;
-}
-
-/*! @ingroup XXH64_family */
-XXH_PUBLIC_API void XXH64_copyState(XXH_NOESCAPE XXH64_state_t* dstState, const XXH64_state_t* srcState)
-{
- XXH_memcpy(dstState, srcState, sizeof(*dstState));
-}
-
-/*! @ingroup XXH64_family */
-XXH_PUBLIC_API XXH_errorcode XXH64_reset(XXH_NOESCAPE XXH64_state_t* statePtr, XXH64_hash_t seed)
-{
- XXH_ASSERT(statePtr != NULL);
- memset(statePtr, 0, sizeof(*statePtr));
- statePtr->v[0] = seed + XXH_PRIME64_1 + XXH_PRIME64_2;
- statePtr->v[1] = seed + XXH_PRIME64_2;
- statePtr->v[2] = seed + 0;
- statePtr->v[3] = seed - XXH_PRIME64_1;
- return XXH_OK;
-}
-
-/*! @ingroup XXH64_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH64_update (XXH_NOESCAPE XXH64_state_t* state, XXH_NOESCAPE const void* input, size_t len)
-{
- if (input==NULL) {
- XXH_ASSERT(len == 0);
- return XXH_OK;
- }
-
- { const xxh_u8* p = (const xxh_u8*)input;
- const xxh_u8* const bEnd = p + len;
-
- state->total_len += len;
-
- if (state->memsize + len < 32) { /* fill in tmp buffer */
- XXH_memcpy(((xxh_u8*)state->mem64) + state->memsize, input, len);
- state->memsize += (xxh_u32)len;
- return XXH_OK;
- }
-
- if (state->memsize) { /* tmp buffer is full */
- XXH_memcpy(((xxh_u8*)state->mem64) + state->memsize, input, 32-state->memsize);
- state->v[0] = XXH64_round(state->v[0], XXH_readLE64(state->mem64+0));
- state->v[1] = XXH64_round(state->v[1], XXH_readLE64(state->mem64+1));
- state->v[2] = XXH64_round(state->v[2], XXH_readLE64(state->mem64+2));
- state->v[3] = XXH64_round(state->v[3], XXH_readLE64(state->mem64+3));
- p += 32 - state->memsize;
- state->memsize = 0;
- }
-
- if (p+32 <= bEnd) {
- const xxh_u8* const limit = bEnd - 32;
-
- do {
- state->v[0] = XXH64_round(state->v[0], XXH_readLE64(p)); p+=8;
- state->v[1] = XXH64_round(state->v[1], XXH_readLE64(p)); p+=8;
- state->v[2] = XXH64_round(state->v[2], XXH_readLE64(p)); p+=8;
- state->v[3] = XXH64_round(state->v[3], XXH_readLE64(p)); p+=8;
- } while (p<=limit);
-
- }
-
- if (p < bEnd) {
- XXH_memcpy(state->mem64, p, (size_t)(bEnd-p));
- state->memsize = (unsigned)(bEnd-p);
- }
- }
-
- return XXH_OK;
-}
-
-
-/*! @ingroup XXH64_family */
-XXH_PUBLIC_API XXH64_hash_t XXH64_digest(XXH_NOESCAPE const XXH64_state_t* state)
-{
- xxh_u64 h64;
-
- if (state->total_len >= 32) {
- h64 = XXH_rotl64(state->v[0], 1) + XXH_rotl64(state->v[1], 7) + XXH_rotl64(state->v[2], 12) + XXH_rotl64(state->v[3], 18);
- h64 = XXH64_mergeRound(h64, state->v[0]);
- h64 = XXH64_mergeRound(h64, state->v[1]);
- h64 = XXH64_mergeRound(h64, state->v[2]);
- h64 = XXH64_mergeRound(h64, state->v[3]);
- } else {
- h64 = state->v[2] /*seed*/ + XXH_PRIME64_5;
- }
-
- h64 += (xxh_u64) state->total_len;
-
- return XXH64_finalize(h64, (const xxh_u8*)state->mem64, (size_t)state->total_len, XXH_aligned);
-}
-#endif /* !XXH_NO_STREAM */
-
-/******* Canonical representation *******/
-
-/*! @ingroup XXH64_family */
-XXH_PUBLIC_API void XXH64_canonicalFromHash(XXH_NOESCAPE XXH64_canonical_t* dst, XXH64_hash_t hash)
-{
- XXH_STATIC_ASSERT(sizeof(XXH64_canonical_t) == sizeof(XXH64_hash_t));
- if (XXH_CPU_LITTLE_ENDIAN) hash = XXH_swap64(hash);
- XXH_memcpy(dst, &hash, sizeof(*dst));
-}
-
-/*! @ingroup XXH64_family */
-XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical(XXH_NOESCAPE const XXH64_canonical_t* src)
-{
- return XXH_readBE64(src);
-}
-
-#ifndef XXH_NO_XXH3
-
-/* *********************************************************************
-* XXH3
-* New generation hash designed for speed on small keys and vectorization
-************************************************************************ */
-/*!
- * @}
- * @defgroup XXH3_impl XXH3 implementation
- * @ingroup impl
- * @{
- */
-
-/* === Compiler specifics === */
-
-#if ((defined(sun) || defined(__sun)) && __cplusplus) /* Solaris includes __STDC_VERSION__ with C++. Tested with GCC 5.5 */
-# define XXH_RESTRICT /* disable */
-#elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* >= C99 */
-# define XXH_RESTRICT restrict
-#elif (defined (__GNUC__) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))) \
- || (defined (__clang__)) \
- || (defined (_MSC_VER) && (_MSC_VER >= 1400)) \
- || (defined (__INTEL_COMPILER) && (__INTEL_COMPILER >= 1300))
-/*
- * There are a LOT more compilers that recognize __restrict but this
- * covers the major ones.
- */
-# define XXH_RESTRICT __restrict
-#else
-# define XXH_RESTRICT /* disable */
-#endif
-
-#if (defined(__GNUC__) && (__GNUC__ >= 3)) \
- || (defined(__INTEL_COMPILER) && (__INTEL_COMPILER >= 800)) \
- || defined(__clang__)
-# define XXH_likely(x) __builtin_expect(x, 1)
-# define XXH_unlikely(x) __builtin_expect(x, 0)
-#else
-# define XXH_likely(x) (x)
-# define XXH_unlikely(x) (x)
-#endif
-
-#ifndef XXH_HAS_INCLUDE
-# ifdef __has_include
-# define XXH_HAS_INCLUDE(x) __has_include(x)
-# else
-# define XXH_HAS_INCLUDE(x) 0
-# endif
-#endif
-
-#if defined(__GNUC__) || defined(__clang__)
-# if defined(__ARM_FEATURE_SVE)
-# include <arm_sve.h>
-# endif
-# if defined(__ARM_NEON__) || defined(__ARM_NEON) \
- || (defined(_M_ARM) && _M_ARM >= 7) \
- || defined(_M_ARM64) || defined(_M_ARM64EC) \
- || (defined(__wasm_simd128__) && XXH_HAS_INCLUDE(<arm_neon.h>)) /* WASM SIMD128 via SIMDe */
-# define inline __inline__ /* circumvent a clang bug */
-# include <arm_neon.h>
-# undef inline
-# elif defined(__AVX2__)
-# include <immintrin.h>
-# elif defined(__SSE2__)
-# include <emmintrin.h>
-# endif
-#endif
-
-#if defined(_MSC_VER)
-# include <intrin.h>
-#endif
-
-/*
- * One goal of XXH3 is to make it fast on both 32-bit and 64-bit, while
- * remaining a true 64-bit/128-bit hash function.
- *
- * This is done by prioritizing a subset of 64-bit operations that can be
- * emulated without too many steps on the average 32-bit machine.
- *
- * For example, these two lines seem similar, and run equally fast on 64-bit:
- *
- * xxh_u64 x;
- * x ^= (x >> 47); // good
- * x ^= (x >> 13); // bad
- *
- * However, to a 32-bit machine, there is a major difference.
- *
- * x ^= (x >> 47) looks like this:
- *
- * x.lo ^= (x.hi >> (47 - 32));
- *
- * while x ^= (x >> 13) looks like this:
- *
- * // note: funnel shifts are not usually cheap.
- * x.lo ^= (x.lo >> 13) | (x.hi << (32 - 13));
- * x.hi ^= (x.hi >> 13);
- *
- * The first one is significantly faster than the second, simply because the
- * shift is larger than 32. This means:
- * - All the bits we need are in the upper 32 bits, so we can ignore the lower
- * 32 bits in the shift.
- * - The shift result will always fit in the lower 32 bits, and therefore,
- * we can ignore the upper 32 bits in the xor.
- *
- * Thanks to this optimization, XXH3 only requires these features to be efficient:
- *
- * - Usable unaligned access
- * - A 32-bit or 64-bit ALU
- * - If 32-bit, a decent ADC instruction
- * - A 32 or 64-bit multiply with a 64-bit result
- * - For the 128-bit variant, a decent byteswap helps short inputs.
- *
- * The first two are already required by XXH32, and almost all 32-bit and 64-bit
- * platforms which can run XXH32 can run XXH3 efficiently.
- *
- * Thumb-1, the classic 16-bit only subset of ARM's instruction set, is one
- * notable exception.
- *
- * First of all, Thumb-1 lacks support for the UMULL instruction which
- * performs the important long multiply. This means numerous __aeabi_lmul
- * calls.
- *
- * Second of all, the 8 functional registers are just not enough.
- * Setup for __aeabi_lmul, byteshift loads, pointers, and all arithmetic need
- * Lo registers, and this shuffling results in thousands more MOVs than A32.
- *
- * A32 and T32 don't have this limitation. They can access all 14 registers,
- * do a 32->64 multiply with UMULL, and the flexible operand allowing free
- * shifts is helpful, too.
- *
- * Therefore, we do a quick sanity check.
- *
- * If compiling Thumb-1 for a target which supports ARM instructions, we will
- * emit a warning, as it is not a "sane" platform to compile for.
- *
- * Usually, if this happens, it is because of an accident and you probably need
- * to specify -march, as you likely meant to compile for a newer architecture.
- *
- * Credit: large sections of the vectorial and asm source code paths
- * have been contributed by @easyaspi314
- */
-#if defined(__thumb__) && !defined(__thumb2__) && defined(__ARM_ARCH_ISA_ARM)
-# warning "XXH3 is highly inefficient without ARM or Thumb-2."
-#endif
-
-/* ==========================================
- * Vectorization detection
- * ========================================== */
-
-#ifdef XXH_DOXYGEN
-/*!
- * @ingroup tuning
- * @brief Overrides the vectorization implementation chosen for XXH3.
- *
- * Can be defined to 0 to disable SIMD or any of the values mentioned in
- * @ref XXH_VECTOR_TYPE.
- *
- * If this is not defined, it uses predefined macros to determine the best
- * implementation.
- */
-# define XXH_VECTOR XXH_SCALAR
-/*!
- * @ingroup tuning
- * @brief Possible values for @ref XXH_VECTOR.
- *
- * Note that these are actually implemented as macros.
- *
- * If this is not defined, it is detected automatically.
- * internal macro XXH_X86DISPATCH overrides this.
- */
-enum XXH_VECTOR_TYPE /* fake enum */ {
- XXH_SCALAR = 0, /*!< Portable scalar version */
- XXH_SSE2 = 1, /*!<
- * SSE2 for Pentium 4, Opteron, all x86_64.
- *
- * @note SSE2 is also guaranteed on Windows 10, macOS, and
- * Android x86.
- */
- XXH_AVX2 = 2, /*!< AVX2 for Haswell and Bulldozer */
- XXH_AVX512 = 3, /*!< AVX512 for Skylake and Icelake */
- XXH_NEON = 4, /*!<
- * NEON for most ARMv7-A, all AArch64, and WASM SIMD128
- * via the SIMDeverywhere polyfill provided with the
- * Emscripten SDK.
- */
- XXH_VSX = 5, /*!< VSX and ZVector for POWER8/z13 (64-bit) */
- XXH_SVE = 6, /*!< SVE for some ARMv8-A and ARMv9-A */
-};
-/*!
- * @ingroup tuning
- * @brief Selects the minimum alignment for XXH3's accumulators.
- *
- * When using SIMD, this should match the alignment required for said vector
- * type, so, for example, 32 for AVX2.
- *
- * Default: Auto detected.
- */
-# define XXH_ACC_ALIGN 8
-#endif
-
-/* Actual definition */
-#ifndef XXH_DOXYGEN
-# define XXH_SCALAR 0
-# define XXH_SSE2 1
-# define XXH_AVX2 2
-# define XXH_AVX512 3
-# define XXH_NEON 4
-# define XXH_VSX 5
-# define XXH_SVE 6
-#endif
-
-#ifndef XXH_VECTOR /* can be defined on command line */
-# if defined(__ARM_FEATURE_SVE)
-# define XXH_VECTOR XXH_SVE
-# elif ( \
- defined(__ARM_NEON__) || defined(__ARM_NEON) /* gcc */ \
- || defined(_M_ARM) || defined(_M_ARM64) || defined(_M_ARM64EC) /* msvc */ \
- || (defined(__wasm_simd128__) && XXH_HAS_INCLUDE(<arm_neon.h>)) /* wasm simd128 via SIMDe */ \
- ) && ( \
- defined(_WIN32) || defined(__LITTLE_ENDIAN__) /* little endian only */ \
- || (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
- )
-# define XXH_VECTOR XXH_NEON
-# elif defined(__AVX512F__)
-# define XXH_VECTOR XXH_AVX512
-# elif defined(__AVX2__)
-# define XXH_VECTOR XXH_AVX2
-# elif defined(__SSE2__) || defined(_M_AMD64) || defined(_M_X64) || (defined(_M_IX86_FP) && (_M_IX86_FP == 2))
-# define XXH_VECTOR XXH_SSE2
-# elif (defined(__PPC64__) && defined(__POWER8_VECTOR__)) \
- || (defined(__s390x__) && defined(__VEC__)) \
- && defined(__GNUC__) /* TODO: IBM XL */
-# define XXH_VECTOR XXH_VSX
-# else
-# define XXH_VECTOR XXH_SCALAR
-# endif
-#endif
-
-/* __ARM_FEATURE_SVE is only supported by GCC & Clang. */
-#if (XXH_VECTOR == XXH_SVE) && !defined(__ARM_FEATURE_SVE)
-# ifdef _MSC_VER
-# pragma warning(once : 4606)
-# else
-# warning "__ARM_FEATURE_SVE isn't supported. Use SCALAR instead."
-# endif
-# undef XXH_VECTOR
-# define XXH_VECTOR XXH_SCALAR
-#endif
-
-/*
- * Controls the alignment of the accumulator,
- * for compatibility with aligned vector loads, which are usually faster.
- */
-#ifndef XXH_ACC_ALIGN
-# if defined(XXH_X86DISPATCH)
-# define XXH_ACC_ALIGN 64 /* for compatibility with avx512 */
-# elif XXH_VECTOR == XXH_SCALAR /* scalar */
-# define XXH_ACC_ALIGN 8
-# elif XXH_VECTOR == XXH_SSE2 /* sse2 */
-# define XXH_ACC_ALIGN 16
-# elif XXH_VECTOR == XXH_AVX2 /* avx2 */
-# define XXH_ACC_ALIGN 32
-# elif XXH_VECTOR == XXH_NEON /* neon */
-# define XXH_ACC_ALIGN 16
-# elif XXH_VECTOR == XXH_VSX /* vsx */
-# define XXH_ACC_ALIGN 16
-# elif XXH_VECTOR == XXH_AVX512 /* avx512 */
-# define XXH_ACC_ALIGN 64
-# elif XXH_VECTOR == XXH_SVE /* sve */
-# define XXH_ACC_ALIGN 64
-# endif
-#endif
-
-#if defined(XXH_X86DISPATCH) || XXH_VECTOR == XXH_SSE2 \
- || XXH_VECTOR == XXH_AVX2 || XXH_VECTOR == XXH_AVX512
-# define XXH_SEC_ALIGN XXH_ACC_ALIGN
-#elif XXH_VECTOR == XXH_SVE
-# define XXH_SEC_ALIGN XXH_ACC_ALIGN
-#else
-# define XXH_SEC_ALIGN 8
-#endif
-
-#if defined(__GNUC__) || defined(__clang__)
-# define XXH_ALIASING __attribute__((may_alias))
-#else
-# define XXH_ALIASING /* nothing */
-#endif
-
-/*
- * UGLY HACK:
- * GCC usually generates the best code with -O3 for xxHash.
- *
- * However, when targeting AVX2, it is overzealous in its unrolling resulting
- * in code roughly 3/4 the speed of Clang.
- *
- * There are other issues, such as GCC splitting _mm256_loadu_si256 into
- * _mm_loadu_si128 + _mm256_inserti128_si256. This is an optimization which
- * only applies to Sandy and Ivy Bridge... which don't even support AVX2.
- *
- * That is why when compiling the AVX2 version, it is recommended to use either
- * -O2 -mavx2 -march=haswell
- * or
- * -O2 -mavx2 -mno-avx256-split-unaligned-load
- * for decent performance, or to use Clang instead.
- *
- * Fortunately, we can control the first one with a pragma that forces GCC into
- * -O2, but the other one we can't control without "failed to inline always
- * inline function due to target mismatch" warnings.
- */
-#if XXH_VECTOR == XXH_AVX2 /* AVX2 */ \
- && defined(__GNUC__) && !defined(__clang__) /* GCC, not Clang */ \
- && defined(__OPTIMIZE__) && XXH_SIZE_OPT <= 0 /* respect -O0 and -Os */
-# pragma GCC push_options
-# pragma GCC optimize("-O2")
-#endif
-
-#if XXH_VECTOR == XXH_NEON
-
-/*
- * UGLY HACK: While AArch64 GCC on Linux does not seem to care, on macOS, GCC -O3
- * optimizes out the entire hashLong loop because of the aliasing violation.
- *
- * However, GCC is also inefficient at load-store optimization with vld1q/vst1q,
- * so the only option is to mark it as aliasing.
- */
-typedef uint64x2_t xxh_aliasing_uint64x2_t XXH_ALIASING;
-
-/*!
- * @internal
- * @brief `vld1q_u64` but faster and alignment-safe.
- *
- * On AArch64, unaligned access is always safe, but on ARMv7-a, it is only
- * *conditionally* safe (`vld1` has an alignment bit like `movdq[ua]` in x86).
- *
- * GCC for AArch64 sees `vld1q_u8` as an intrinsic instead of a load, so it
- * prohibits load-store optimizations. Therefore, a direct dereference is used.
- *
- * Otherwise, `vld1q_u8` is used with `vreinterpretq_u8_u64` to do a safe
- * unaligned load.
- */
-#if defined(__aarch64__) && defined(__GNUC__) && !defined(__clang__)
-XXH_FORCE_INLINE uint64x2_t XXH_vld1q_u64(void const* ptr) /* silence -Wcast-align */
-{
- return *(xxh_aliasing_uint64x2_t const *)ptr;
-}
-#else
-XXH_FORCE_INLINE uint64x2_t XXH_vld1q_u64(void const* ptr)
-{
- return vreinterpretq_u64_u8(vld1q_u8((uint8_t const*)ptr));
-}
-#endif
-
-/*!
- * @internal
- * @brief `vmlal_u32` on low and high halves of a vector.
- *
- * This is a workaround for AArch64 GCC < 11 which implemented arm_neon.h with
- * inline assembly and were therefore incapable of merging the `vget_{low, high}_u32`
- * with `vmlal_u32`.
- */
-#if defined(__aarch64__) && defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 11
-XXH_FORCE_INLINE uint64x2_t
-XXH_vmlal_low_u32(uint64x2_t acc, uint32x4_t lhs, uint32x4_t rhs)
-{
- /* Inline assembly is the only way */
- __asm__("umlal %0.2d, %1.2s, %2.2s" : "+w" (acc) : "w" (lhs), "w" (rhs));
- return acc;
-}
-XXH_FORCE_INLINE uint64x2_t
-XXH_vmlal_high_u32(uint64x2_t acc, uint32x4_t lhs, uint32x4_t rhs)
-{
- /* This intrinsic works as expected */
- return vmlal_high_u32(acc, lhs, rhs);
-}
-#else
-/* Portable intrinsic versions */
-XXH_FORCE_INLINE uint64x2_t
-XXH_vmlal_low_u32(uint64x2_t acc, uint32x4_t lhs, uint32x4_t rhs)
-{
- return vmlal_u32(acc, vget_low_u32(lhs), vget_low_u32(rhs));
-}
-/*! @copydoc XXH_vmlal_low_u32
- * Assume the compiler converts this to vmlal_high_u32 on aarch64 */
-XXH_FORCE_INLINE uint64x2_t
-XXH_vmlal_high_u32(uint64x2_t acc, uint32x4_t lhs, uint32x4_t rhs)
-{
- return vmlal_u32(acc, vget_high_u32(lhs), vget_high_u32(rhs));
-}
-#endif
-
-/*!
- * @ingroup tuning
- * @brief Controls the NEON to scalar ratio for XXH3
- *
- * This can be set to 2, 4, 6, or 8.
- *
- * ARM Cortex CPUs are _very_ sensitive to how their pipelines are used.
- *
- * For example, the Cortex-A73 can dispatch 3 micro-ops per cycle, but only 2 of those
- * can be NEON. If you are only using NEON instructions, you are only using 2/3 of the CPU
- * bandwidth.
- *
- * This is even more noticeable on the more advanced cores like the Cortex-A76 which
- * can dispatch 8 micro-ops per cycle, but still only 2 NEON micro-ops at once.
- *
- * Therefore, to make the most out of the pipeline, it is beneficial to run 6 NEON lanes
- * and 2 scalar lanes, which is chosen by default.
- *
- * This does not apply to Apple processors or 32-bit processors, which run better with
- * full NEON. These will default to 8. Additionally, size-optimized builds run 8 lanes.
- *
- * This change benefits CPUs with large micro-op buffers without negatively affecting
- * most other CPUs:
- *
- * | Chipset | Dispatch type | NEON only | 6:2 hybrid | Diff. |
- * |:----------------------|:--------------------|----------:|-----------:|------:|
- * | Snapdragon 730 (A76) | 2 NEON/8 micro-ops | 8.8 GB/s | 10.1 GB/s | ~16% |
- * | Snapdragon 835 (A73) | 2 NEON/3 micro-ops | 5.1 GB/s | 5.3 GB/s | ~5% |
- * | Marvell PXA1928 (A53) | In-order dual-issue | 1.9 GB/s | 1.9 GB/s | 0% |
- * | Apple M1 | 4 NEON/8 micro-ops | 37.3 GB/s | 36.1 GB/s | ~-3% |
- *
- * It also seems to fix some bad codegen on GCC, making it almost as fast as clang.
- *
- * When using WASM SIMD128, if this is 2 or 6, SIMDe will scalarize 2 of the lanes meaning
- * it effectively becomes worse 4.
- *
- * @see XXH3_accumulate_512_neon()
- */
-# ifndef XXH3_NEON_LANES
-# if (defined(__aarch64__) || defined(__arm64__) || defined(_M_ARM64) || defined(_M_ARM64EC)) \
- && !defined(__APPLE__) && XXH_SIZE_OPT <= 0
-# define XXH3_NEON_LANES 6
-# else
-# define XXH3_NEON_LANES XXH_ACC_NB
-# endif
-# endif
-#endif /* XXH_VECTOR == XXH_NEON */
-
-/*
- * VSX and Z Vector helpers.
- *
- * This is very messy, and any pull requests to clean this up are welcome.
- *
- * There are a lot of problems with supporting VSX and s390x, due to
- * inconsistent intrinsics, spotty coverage, and multiple endiannesses.
- */
-#if XXH_VECTOR == XXH_VSX
-/* Annoyingly, these headers _may_ define three macros: `bool`, `vector`,
- * and `pixel`. This is a problem for obvious reasons.
- *
- * These keywords are unnecessary; the spec literally says they are
- * equivalent to `__bool`, `__vector`, and `__pixel` and may be undef'd
- * after including the header.
- *
- * We use pragma push_macro/pop_macro to keep the namespace clean. */
-# pragma push_macro("bool")
-# pragma push_macro("vector")
-# pragma push_macro("pixel")
-/* silence potential macro redefined warnings */
-# undef bool
-# undef vector
-# undef pixel
-
-# if defined(__s390x__)
-# include <s390intrin.h>
-# else
-# include <altivec.h>
-# endif
-
-/* Restore the original macro values, if applicable. */
-# pragma pop_macro("pixel")
-# pragma pop_macro("vector")
-# pragma pop_macro("bool")
-
-typedef __vector unsigned long long xxh_u64x2;
-typedef __vector unsigned char xxh_u8x16;
-typedef __vector unsigned xxh_u32x4;
-
-/*
- * UGLY HACK: Similar to aarch64 macOS GCC, s390x GCC has the same aliasing issue.
- */
-typedef xxh_u64x2 xxh_aliasing_u64x2 XXH_ALIASING;
-
-# ifndef XXH_VSX_BE
-# if defined(__BIG_ENDIAN__) \
- || (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
-# define XXH_VSX_BE 1
-# elif defined(__VEC_ELEMENT_REG_ORDER__) && __VEC_ELEMENT_REG_ORDER__ == __ORDER_BIG_ENDIAN__
-# warning "-maltivec=be is not recommended. Please use native endianness."
-# define XXH_VSX_BE 1
-# else
-# define XXH_VSX_BE 0
-# endif
-# endif /* !defined(XXH_VSX_BE) */
-
-# if XXH_VSX_BE
-# if defined(__POWER9_VECTOR__) || (defined(__clang__) && defined(__s390x__))
-# define XXH_vec_revb vec_revb
-# else
-/*!
- * A polyfill for POWER9's vec_revb().
- */
-XXH_FORCE_INLINE xxh_u64x2 XXH_vec_revb(xxh_u64x2 val)
-{
- xxh_u8x16 const vByteSwap = { 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00,
- 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08 };
- return vec_perm(val, val, vByteSwap);
-}
-# endif
-# endif /* XXH_VSX_BE */
-
-/*!
- * Performs an unaligned vector load and byte swaps it on big endian.
- */
-XXH_FORCE_INLINE xxh_u64x2 XXH_vec_loadu(const void *ptr)
-{
- xxh_u64x2 ret;
- XXH_memcpy(&ret, ptr, sizeof(xxh_u64x2));
-# if XXH_VSX_BE
- ret = XXH_vec_revb(ret);
-# endif
- return ret;
-}
-
-/*
- * vec_mulo and vec_mule are very problematic intrinsics on PowerPC
- *
- * These intrinsics weren't added until GCC 8, despite existing for a while,
- * and they are endian dependent. Also, their meaning swap depending on version.
- * */
-# if defined(__s390x__)
- /* s390x is always big endian, no issue on this platform */
-# define XXH_vec_mulo vec_mulo
-# define XXH_vec_mule vec_mule
-# elif defined(__clang__) && XXH_HAS_BUILTIN(__builtin_altivec_vmuleuw) && !defined(__ibmxl__)
-/* Clang has a better way to control this, we can just use the builtin which doesn't swap. */
- /* The IBM XL Compiler (which defined __clang__) only implements the vec_* operations */
-# define XXH_vec_mulo __builtin_altivec_vmulouw
-# define XXH_vec_mule __builtin_altivec_vmuleuw
-# else
-/* gcc needs inline assembly */
-/* Adapted from https://github.com/google/highwayhash/blob/master/highwayhash/hh_vsx.h. */
-XXH_FORCE_INLINE xxh_u64x2 XXH_vec_mulo(xxh_u32x4 a, xxh_u32x4 b)
-{
- xxh_u64x2 result;
- __asm__("vmulouw %0, %1, %2" : "=v" (result) : "v" (a), "v" (b));
- return result;
-}
-XXH_FORCE_INLINE xxh_u64x2 XXH_vec_mule(xxh_u32x4 a, xxh_u32x4 b)
-{
- xxh_u64x2 result;
- __asm__("vmuleuw %0, %1, %2" : "=v" (result) : "v" (a), "v" (b));
- return result;
-}
-# endif /* XXH_vec_mulo, XXH_vec_mule */
-#endif /* XXH_VECTOR == XXH_VSX */
-
-#if XXH_VECTOR == XXH_SVE
-#define ACCRND(acc, offset) \
-do { \
- svuint64_t input_vec = svld1_u64(mask, xinput + offset); \
- svuint64_t secret_vec = svld1_u64(mask, xsecret + offset); \
- svuint64_t mixed = sveor_u64_x(mask, secret_vec, input_vec); \
- svuint64_t swapped = svtbl_u64(input_vec, kSwap); \
- svuint64_t mixed_lo = svextw_u64_x(mask, mixed); \
- svuint64_t mixed_hi = svlsr_n_u64_x(mask, mixed, 32); \
- svuint64_t mul = svmad_u64_x(mask, mixed_lo, mixed_hi, swapped); \
- acc = svadd_u64_x(mask, acc, mul); \
-} while (0)
-#endif /* XXH_VECTOR == XXH_SVE */
-
-/* prefetch
- * can be disabled, by declaring XXH_NO_PREFETCH build macro */
-#if defined(XXH_NO_PREFETCH)
-# define XXH_PREFETCH(ptr) (void)(ptr) /* disabled */
-#else
-# if XXH_SIZE_OPT >= 1
-# define XXH_PREFETCH(ptr) (void)(ptr)
-# elif defined(_MSC_VER) && (defined(_M_X64) || defined(_M_IX86)) /* _mm_prefetch() not defined outside of x86/x64 */
-# include <mmintrin.h> /* https://msdn.microsoft.com/fr-fr/library/84szxsww(v=vs.90).aspx */
-# define XXH_PREFETCH(ptr) _mm_prefetch((const char*)(ptr), _MM_HINT_T0)
-# elif defined(__GNUC__) && ( (__GNUC__ >= 4) || ( (__GNUC__ == 3) && (__GNUC_MINOR__ >= 1) ) )
-# define XXH_PREFETCH(ptr) __builtin_prefetch((ptr), 0 /* rw==read */, 3 /* locality */)
-# else
-# define XXH_PREFETCH(ptr) (void)(ptr) /* disabled */
-# endif
-#endif /* XXH_NO_PREFETCH */
-
-
-/* ==========================================
- * XXH3 default settings
- * ========================================== */
-
-#define XXH_SECRET_DEFAULT_SIZE 192 /* minimum XXH3_SECRET_SIZE_MIN */
-
-#if (XXH_SECRET_DEFAULT_SIZE < XXH3_SECRET_SIZE_MIN)
-# error "default keyset is not large enough"
-#endif
-
-/*! Pseudorandom secret taken directly from FARSH. */
-XXH_ALIGN(64) static const xxh_u8 XXH3_kSecret[XXH_SECRET_DEFAULT_SIZE] = {
- 0xb8, 0xfe, 0x6c, 0x39, 0x23, 0xa4, 0x4b, 0xbe, 0x7c, 0x01, 0x81, 0x2c, 0xf7, 0x21, 0xad, 0x1c,
- 0xde, 0xd4, 0x6d, 0xe9, 0x83, 0x90, 0x97, 0xdb, 0x72, 0x40, 0xa4, 0xa4, 0xb7, 0xb3, 0x67, 0x1f,
- 0xcb, 0x79, 0xe6, 0x4e, 0xcc, 0xc0, 0xe5, 0x78, 0x82, 0x5a, 0xd0, 0x7d, 0xcc, 0xff, 0x72, 0x21,
- 0xb8, 0x08, 0x46, 0x74, 0xf7, 0x43, 0x24, 0x8e, 0xe0, 0x35, 0x90, 0xe6, 0x81, 0x3a, 0x26, 0x4c,
- 0x3c, 0x28, 0x52, 0xbb, 0x91, 0xc3, 0x00, 0xcb, 0x88, 0xd0, 0x65, 0x8b, 0x1b, 0x53, 0x2e, 0xa3,
- 0x71, 0x64, 0x48, 0x97, 0xa2, 0x0d, 0xf9, 0x4e, 0x38, 0x19, 0xef, 0x46, 0xa9, 0xde, 0xac, 0xd8,
- 0xa8, 0xfa, 0x76, 0x3f, 0xe3, 0x9c, 0x34, 0x3f, 0xf9, 0xdc, 0xbb, 0xc7, 0xc7, 0x0b, 0x4f, 0x1d,
- 0x8a, 0x51, 0xe0, 0x4b, 0xcd, 0xb4, 0x59, 0x31, 0xc8, 0x9f, 0x7e, 0xc9, 0xd9, 0x78, 0x73, 0x64,
- 0xea, 0xc5, 0xac, 0x83, 0x34, 0xd3, 0xeb, 0xc3, 0xc5, 0x81, 0xa0, 0xff, 0xfa, 0x13, 0x63, 0xeb,
- 0x17, 0x0d, 0xdd, 0x51, 0xb7, 0xf0, 0xda, 0x49, 0xd3, 0x16, 0x55, 0x26, 0x29, 0xd4, 0x68, 0x9e,
- 0x2b, 0x16, 0xbe, 0x58, 0x7d, 0x47, 0xa1, 0xfc, 0x8f, 0xf8, 0xb8, 0xd1, 0x7a, 0xd0, 0x31, 0xce,
- 0x45, 0xcb, 0x3a, 0x8f, 0x95, 0x16, 0x04, 0x28, 0xaf, 0xd7, 0xfb, 0xca, 0xbb, 0x4b, 0x40, 0x7e,
-};
-
-static const xxh_u64 PRIME_MX1 = 0x165667919E3779F9ULL; /*!< 0b0001011001010110011001111001000110011110001101110111100111111001 */
-static const xxh_u64 PRIME_MX2 = 0x9FB21C651E98DF25ULL; /*!< 0b1001111110110010000111000110010100011110100110001101111100100101 */
-
-#ifdef XXH_OLD_NAMES
-# define kSecret XXH3_kSecret
-#endif
-
-#ifdef XXH_DOXYGEN
-/*!
- * @brief Calculates a 32-bit to 64-bit long multiply.
- *
- * Implemented as a macro.
- *
- * Wraps `__emulu` on MSVC x86 because it tends to call `__allmul` when it doesn't
- * need to (but it shouldn't need to anyways, it is about 7 instructions to do
- * a 64x64 multiply...). Since we know that this will _always_ emit `MULL`, we
- * use that instead of the normal method.
- *
- * If you are compiling for platforms like Thumb-1 and don't have a better option,
- * you may also want to write your own long multiply routine here.
- *
- * @param x, y Numbers to be multiplied
- * @return 64-bit product of the low 32 bits of @p x and @p y.
- */
-XXH_FORCE_INLINE xxh_u64
-XXH_mult32to64(xxh_u64 x, xxh_u64 y)
-{
- return (x & 0xFFFFFFFF) * (y & 0xFFFFFFFF);
-}
-#elif defined(_MSC_VER) && defined(_M_IX86)
-# define XXH_mult32to64(x, y) __emulu((unsigned)(x), (unsigned)(y))
-#else
-/*
- * Downcast + upcast is usually better than masking on older compilers like
- * GCC 4.2 (especially 32-bit ones), all without affecting newer compilers.
- *
- * The other method, (x & 0xFFFFFFFF) * (y & 0xFFFFFFFF), will AND both operands
- * and perform a full 64x64 multiply -- entirely redundant on 32-bit.
- */
-# define XXH_mult32to64(x, y) ((xxh_u64)(xxh_u32)(x) * (xxh_u64)(xxh_u32)(y))
-#endif
-
-/*!
- * @brief Calculates a 64->128-bit long multiply.
- *
- * Uses `__uint128_t` and `_umul128` if available, otherwise uses a scalar
- * version.
- *
- * @param lhs , rhs The 64-bit integers to be multiplied
- * @return The 128-bit result represented in an @ref XXH128_hash_t.
- */
-static XXH128_hash_t
-XXH_mult64to128(xxh_u64 lhs, xxh_u64 rhs)
-{
- /*
- * GCC/Clang __uint128_t method.
- *
- * On most 64-bit targets, GCC and Clang define a __uint128_t type.
- * This is usually the best way as it usually uses a native long 64-bit
- * multiply, such as MULQ on x86_64 or MUL + UMULH on aarch64.
- *
- * Usually.
- *
- * Despite being a 32-bit platform, Clang (and emscripten) define this type
- * despite not having the arithmetic for it. This results in a laggy
- * compiler builtin call which calculates a full 128-bit multiply.
- * In that case it is best to use the portable one.
- * https://github.com/Cyan4973/xxHash/issues/211#issuecomment-515575677
- */
-#if (defined(__GNUC__) || defined(__clang__)) && !defined(__wasm__) \
- && defined(__SIZEOF_INT128__) \
- || (defined(_INTEGRAL_MAX_BITS) && _INTEGRAL_MAX_BITS >= 128)
-
- __uint128_t const product = (__uint128_t)lhs * (__uint128_t)rhs;
- XXH128_hash_t r128;
- r128.low64 = (xxh_u64)(product);
- r128.high64 = (xxh_u64)(product >> 64);
- return r128;
-
- /*
- * MSVC for x64's _umul128 method.
- *
- * xxh_u64 _umul128(xxh_u64 Multiplier, xxh_u64 Multiplicand, xxh_u64 *HighProduct);
- *
- * This compiles to single operand MUL on x64.
- */
-#elif (defined(_M_X64) || defined(_M_IA64)) && !defined(_M_ARM64EC)
-
-#ifndef _MSC_VER
-# pragma intrinsic(_umul128)
-#endif
- xxh_u64 product_high;
- xxh_u64 const product_low = _umul128(lhs, rhs, &product_high);
- XXH128_hash_t r128;
- r128.low64 = product_low;
- r128.high64 = product_high;
- return r128;
-
- /*
- * MSVC for ARM64's __umulh method.
- *
- * This compiles to the same MUL + UMULH as GCC/Clang's __uint128_t method.
- */
-#elif defined(_M_ARM64) || defined(_M_ARM64EC)
-
-#ifndef _MSC_VER
-# pragma intrinsic(__umulh)
-#endif
- XXH128_hash_t r128;
- r128.low64 = lhs * rhs;
- r128.high64 = __umulh(lhs, rhs);
- return r128;
-
-#else
- /*
- * Portable scalar method. Optimized for 32-bit and 64-bit ALUs.
- *
- * This is a fast and simple grade school multiply, which is shown below
- * with base 10 arithmetic instead of base 0x100000000.
- *
- * 9 3 // D2 lhs = 93
- * x 7 5 // D2 rhs = 75
- * ----------
- * 1 5 // D2 lo_lo = (93 % 10) * (75 % 10) = 15
- * 4 5 | // D2 hi_lo = (93 / 10) * (75 % 10) = 45
- * 2 1 | // D2 lo_hi = (93 % 10) * (75 / 10) = 21
- * + 6 3 | | // D2 hi_hi = (93 / 10) * (75 / 10) = 63
- * ---------
- * 2 7 | // D2 cross = (15 / 10) + (45 % 10) + 21 = 27
- * + 6 7 | | // D2 upper = (27 / 10) + (45 / 10) + 63 = 67
- * ---------
- * 6 9 7 5 // D4 res = (27 * 10) + (15 % 10) + (67 * 100) = 6975
- *
- * The reasons for adding the products like this are:
- * 1. It avoids manual carry tracking. Just like how
- * (9 * 9) + 9 + 9 = 99, the same applies with this for UINT64_MAX.
- * This avoids a lot of complexity.
- *
- * 2. It hints for, and on Clang, compiles to, the powerful UMAAL
- * instruction available in ARM's Digital Signal Processing extension
- * in 32-bit ARMv6 and later, which is shown below:
- *
- * void UMAAL(xxh_u32 *RdLo, xxh_u32 *RdHi, xxh_u32 Rn, xxh_u32 Rm)
- * {
- * xxh_u64 product = (xxh_u64)*RdLo * (xxh_u64)*RdHi + Rn + Rm;
- * *RdLo = (xxh_u32)(product & 0xFFFFFFFF);
- * *RdHi = (xxh_u32)(product >> 32);
- * }
- *
- * This instruction was designed for efficient long multiplication, and
- * allows this to be calculated in only 4 instructions at speeds
- * comparable to some 64-bit ALUs.
- *
- * 3. It isn't terrible on other platforms. Usually this will be a couple
- * of 32-bit ADD/ADCs.
- */
-
- /* First calculate all of the cross products. */
- xxh_u64 const lo_lo = XXH_mult32to64(lhs & 0xFFFFFFFF, rhs & 0xFFFFFFFF);
- xxh_u64 const hi_lo = XXH_mult32to64(lhs >> 32, rhs & 0xFFFFFFFF);
- xxh_u64 const lo_hi = XXH_mult32to64(lhs & 0xFFFFFFFF, rhs >> 32);
- xxh_u64 const hi_hi = XXH_mult32to64(lhs >> 32, rhs >> 32);
-
- /* Now add the products together. These will never overflow. */
- xxh_u64 const cross = (lo_lo >> 32) + (hi_lo & 0xFFFFFFFF) + lo_hi;
- xxh_u64 const upper = (hi_lo >> 32) + (cross >> 32) + hi_hi;
- xxh_u64 const lower = (cross << 32) | (lo_lo & 0xFFFFFFFF);
-
- XXH128_hash_t r128;
- r128.low64 = lower;
- r128.high64 = upper;
- return r128;
-#endif
-}
-
-/*!
- * @brief Calculates a 64-bit to 128-bit multiply, then XOR folds it.
- *
- * The reason for the separate function is to prevent passing too many structs
- * around by value. This will hopefully inline the multiply, but we don't force it.
- *
- * @param lhs , rhs The 64-bit integers to multiply
- * @return The low 64 bits of the product XOR'd by the high 64 bits.
- * @see XXH_mult64to128()
- */
-static xxh_u64
-XXH3_mul128_fold64(xxh_u64 lhs, xxh_u64 rhs)
-{
- XXH128_hash_t product = XXH_mult64to128(lhs, rhs);
- return product.low64 ^ product.high64;
-}
-
-/*! Seems to produce slightly better code on GCC for some reason. */
-XXH_FORCE_INLINE XXH_CONSTF xxh_u64 XXH_xorshift64(xxh_u64 v64, int shift)
-{
- XXH_ASSERT(0 <= shift && shift < 64);
- return v64 ^ (v64 >> shift);
-}
-
-/*
- * This is a fast avalanche stage,
- * suitable when input bits are already partially mixed
- */
-static XXH64_hash_t XXH3_avalanche(xxh_u64 h64)
-{
- h64 = XXH_xorshift64(h64, 37);
- h64 *= PRIME_MX1;
- h64 = XXH_xorshift64(h64, 32);
- return h64;
-}
-
-/*
- * This is a stronger avalanche,
- * inspired by Pelle Evensen's rrmxmx
- * preferable when input has not been previously mixed
- */
-static XXH64_hash_t XXH3_rrmxmx(xxh_u64 h64, xxh_u64 len)
-{
- /* this mix is inspired by Pelle Evensen's rrmxmx */
- h64 ^= XXH_rotl64(h64, 49) ^ XXH_rotl64(h64, 24);
- h64 *= PRIME_MX2;
- h64 ^= (h64 >> 35) + len ;
- h64 *= PRIME_MX2;
- return XXH_xorshift64(h64, 28);
-}
-
-
-/* ==========================================
- * Short keys
- * ==========================================
- * One of the shortcomings of XXH32 and XXH64 was that their performance was
- * sub-optimal on short lengths. It used an iterative algorithm which strongly
- * favored lengths that were a multiple of 4 or 8.
- *
- * Instead of iterating over individual inputs, we use a set of single shot
- * functions which piece together a range of lengths and operate in constant time.
- *
- * Additionally, the number of multiplies has been significantly reduced. This
- * reduces latency, especially when emulating 64-bit multiplies on 32-bit.
- *
- * Depending on the platform, this may or may not be faster than XXH32, but it
- * is almost guaranteed to be faster than XXH64.
- */
-
-/*
- * At very short lengths, there isn't enough input to fully hide secrets, or use
- * the entire secret.
- *
- * There is also only a limited amount of mixing we can do before significantly
- * impacting performance.
- *
- * Therefore, we use different sections of the secret and always mix two secret
- * samples with an XOR. This should have no effect on performance on the
- * seedless or withSeed variants because everything _should_ be constant folded
- * by modern compilers.
- *
- * The XOR mixing hides individual parts of the secret and increases entropy.
- *
- * This adds an extra layer of strength for custom secrets.
- */
-XXH_FORCE_INLINE XXH_PUREF XXH64_hash_t
-XXH3_len_1to3_64b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(input != NULL);
- XXH_ASSERT(1 <= len && len <= 3);
- XXH_ASSERT(secret != NULL);
- /*
- * len = 1: combined = { input[0], 0x01, input[0], input[0] }
- * len = 2: combined = { input[1], 0x02, input[0], input[1] }
- * len = 3: combined = { input[2], 0x03, input[0], input[1] }
- */
- { xxh_u8 const c1 = input[0];
- xxh_u8 const c2 = input[len >> 1];
- xxh_u8 const c3 = input[len - 1];
- xxh_u32 const combined = ((xxh_u32)c1 << 16) | ((xxh_u32)c2 << 24)
- | ((xxh_u32)c3 << 0) | ((xxh_u32)len << 8);
- xxh_u64 const bitflip = (XXH_readLE32(secret) ^ XXH_readLE32(secret+4)) + seed;
- xxh_u64 const keyed = (xxh_u64)combined ^ bitflip;
- return XXH64_avalanche(keyed);
- }
-}
-
-XXH_FORCE_INLINE XXH_PUREF XXH64_hash_t
-XXH3_len_4to8_64b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(input != NULL);
- XXH_ASSERT(secret != NULL);
- XXH_ASSERT(4 <= len && len <= 8);
- seed ^= (xxh_u64)XXH_swap32((xxh_u32)seed) << 32;
- { xxh_u32 const input1 = XXH_readLE32(input);
- xxh_u32 const input2 = XXH_readLE32(input + len - 4);
- xxh_u64 const bitflip = (XXH_readLE64(secret+8) ^ XXH_readLE64(secret+16)) - seed;
- xxh_u64 const input64 = input2 + (((xxh_u64)input1) << 32);
- xxh_u64 const keyed = input64 ^ bitflip;
- return XXH3_rrmxmx(keyed, len);
- }
-}
-
-XXH_FORCE_INLINE XXH_PUREF XXH64_hash_t
-XXH3_len_9to16_64b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(input != NULL);
- XXH_ASSERT(secret != NULL);
- XXH_ASSERT(9 <= len && len <= 16);
- { xxh_u64 const bitflip1 = (XXH_readLE64(secret+24) ^ XXH_readLE64(secret+32)) + seed;
- xxh_u64 const bitflip2 = (XXH_readLE64(secret+40) ^ XXH_readLE64(secret+48)) - seed;
- xxh_u64 const input_lo = XXH_readLE64(input) ^ bitflip1;
- xxh_u64 const input_hi = XXH_readLE64(input + len - 8) ^ bitflip2;
- xxh_u64 const acc = len
- + XXH_swap64(input_lo) + input_hi
- + XXH3_mul128_fold64(input_lo, input_hi);
- return XXH3_avalanche(acc);
- }
-}
-
-XXH_FORCE_INLINE XXH_PUREF XXH64_hash_t
-XXH3_len_0to16_64b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(len <= 16);
- { if (XXH_likely(len > 8)) return XXH3_len_9to16_64b(input, len, secret, seed);
- if (XXH_likely(len >= 4)) return XXH3_len_4to8_64b(input, len, secret, seed);
- if (len) return XXH3_len_1to3_64b(input, len, secret, seed);
- return XXH64_avalanche(seed ^ (XXH_readLE64(secret+56) ^ XXH_readLE64(secret+64)));
- }
-}
-
-/*
- * DISCLAIMER: There are known *seed-dependent* multicollisions here due to
- * multiplication by zero, affecting hashes of lengths 17 to 240.
- *
- * However, they are very unlikely.
- *
- * Keep this in mind when using the unseeded XXH3_64bits() variant: As with all
- * unseeded non-cryptographic hashes, it does not attempt to defend itself
- * against specially crafted inputs, only random inputs.
- *
- * Compared to classic UMAC where a 1 in 2^31 chance of 4 consecutive bytes
- * cancelling out the secret is taken an arbitrary number of times (addressed
- * in XXH3_accumulate_512), this collision is very unlikely with random inputs
- * and/or proper seeding:
- *
- * This only has a 1 in 2^63 chance of 8 consecutive bytes cancelling out, in a
- * function that is only called up to 16 times per hash with up to 240 bytes of
- * input.
- *
- * This is not too bad for a non-cryptographic hash function, especially with
- * only 64 bit outputs.
- *
- * The 128-bit variant (which trades some speed for strength) is NOT affected
- * by this, although it is always a good idea to use a proper seed if you care
- * about strength.
- */
-XXH_FORCE_INLINE xxh_u64 XXH3_mix16B(const xxh_u8* XXH_RESTRICT input,
- const xxh_u8* XXH_RESTRICT secret, xxh_u64 seed64)
-{
-#if defined(__GNUC__) && !defined(__clang__) /* GCC, not Clang */ \
- && defined(__i386__) && defined(__SSE2__) /* x86 + SSE2 */ \
- && !defined(XXH_ENABLE_AUTOVECTORIZE) /* Define to disable like XXH32 hack */
- /*
- * UGLY HACK:
- * GCC for x86 tends to autovectorize the 128-bit multiply, resulting in
- * slower code.
- *
- * By forcing seed64 into a register, we disrupt the cost model and
- * cause it to scalarize. See `XXH32_round()`
- *
- * FIXME: Clang's output is still _much_ faster -- On an AMD Ryzen 3600,
- * XXH3_64bits @ len=240 runs at 4.6 GB/s with Clang 9, but 3.3 GB/s on
- * GCC 9.2, despite both emitting scalar code.
- *
- * GCC generates much better scalar code than Clang for the rest of XXH3,
- * which is why finding a more optimal codepath is an interest.
- */
- XXH_COMPILER_GUARD(seed64);
-#endif
- { xxh_u64 const input_lo = XXH_readLE64(input);
- xxh_u64 const input_hi = XXH_readLE64(input+8);
- return XXH3_mul128_fold64(
- input_lo ^ (XXH_readLE64(secret) + seed64),
- input_hi ^ (XXH_readLE64(secret+8) - seed64)
- );
- }
-}
-
-/* For mid range keys, XXH3 uses a Mum-hash variant. */
-XXH_FORCE_INLINE XXH_PUREF XXH64_hash_t
-XXH3_len_17to128_64b(const xxh_u8* XXH_RESTRICT input, size_t len,
- const xxh_u8* XXH_RESTRICT secret, size_t secretSize,
- XXH64_hash_t seed)
-{
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN); (void)secretSize;
- XXH_ASSERT(16 < len && len <= 128);
-
- { xxh_u64 acc = len * XXH_PRIME64_1;
-#if XXH_SIZE_OPT >= 1
- /* Smaller and cleaner, but slightly slower. */
- unsigned int i = (unsigned int)(len - 1) / 32;
- do {
- acc += XXH3_mix16B(input+16 * i, secret+32*i, seed);
- acc += XXH3_mix16B(input+len-16*(i+1), secret+32*i+16, seed);
- } while (i-- != 0);
-#else
- if (len > 32) {
- if (len > 64) {
- if (len > 96) {
- acc += XXH3_mix16B(input+48, secret+96, seed);
- acc += XXH3_mix16B(input+len-64, secret+112, seed);
- }
- acc += XXH3_mix16B(input+32, secret+64, seed);
- acc += XXH3_mix16B(input+len-48, secret+80, seed);
- }
- acc += XXH3_mix16B(input+16, secret+32, seed);
- acc += XXH3_mix16B(input+len-32, secret+48, seed);
- }
- acc += XXH3_mix16B(input+0, secret+0, seed);
- acc += XXH3_mix16B(input+len-16, secret+16, seed);
-#endif
- return XXH3_avalanche(acc);
- }
-}
-
-#define XXH3_MIDSIZE_MAX 240
-
-XXH_NO_INLINE XXH_PUREF XXH64_hash_t
-XXH3_len_129to240_64b(const xxh_u8* XXH_RESTRICT input, size_t len,
- const xxh_u8* XXH_RESTRICT secret, size_t secretSize,
- XXH64_hash_t seed)
-{
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN); (void)secretSize;
- XXH_ASSERT(128 < len && len <= XXH3_MIDSIZE_MAX);
-
- #define XXH3_MIDSIZE_STARTOFFSET 3
- #define XXH3_MIDSIZE_LASTOFFSET 17
-
- { xxh_u64 acc = len * XXH_PRIME64_1;
- xxh_u64 acc_end;
- unsigned int const nbRounds = (unsigned int)len / 16;
- unsigned int i;
- XXH_ASSERT(128 < len && len <= XXH3_MIDSIZE_MAX);
- for (i=0; i<8; i++) {
- acc += XXH3_mix16B(input+(16*i), secret+(16*i), seed);
- }
- /* last bytes */
- acc_end = XXH3_mix16B(input + len - 16, secret + XXH3_SECRET_SIZE_MIN - XXH3_MIDSIZE_LASTOFFSET, seed);
- XXH_ASSERT(nbRounds >= 8);
- acc = XXH3_avalanche(acc);
-#if defined(__clang__) /* Clang */ \
- && (defined(__ARM_NEON) || defined(__ARM_NEON__)) /* NEON */ \
- && !defined(XXH_ENABLE_AUTOVECTORIZE) /* Define to disable */
- /*
- * UGLY HACK:
- * Clang for ARMv7-A tries to vectorize this loop, similar to GCC x86.
- * In everywhere else, it uses scalar code.
- *
- * For 64->128-bit multiplies, even if the NEON was 100% optimal, it
- * would still be slower than UMAAL (see XXH_mult64to128).
- *
- * Unfortunately, Clang doesn't handle the long multiplies properly and
- * converts them to the nonexistent "vmulq_u64" intrinsic, which is then
- * scalarized into an ugly mess of VMOV.32 instructions.
- *
- * This mess is difficult to avoid without turning autovectorization
- * off completely, but they are usually relatively minor and/or not
- * worth it to fix.
- *
- * This loop is the easiest to fix, as unlike XXH32, this pragma
- * _actually works_ because it is a loop vectorization instead of an
- * SLP vectorization.
- */
- #pragma clang loop vectorize(disable)
-#endif
- for (i=8 ; i < nbRounds; i++) {
- /*
- * Prevents clang for unrolling the acc loop and interleaving with this one.
- */
- XXH_COMPILER_GUARD(acc);
- acc_end += XXH3_mix16B(input+(16*i), secret+(16*(i-8)) + XXH3_MIDSIZE_STARTOFFSET, seed);
- }
- return XXH3_avalanche(acc + acc_end);
- }
-}
-
-
-/* ======= Long Keys ======= */
-
-#define XXH_STRIPE_LEN 64
-#define XXH_SECRET_CONSUME_RATE 8 /* nb of secret bytes consumed at each accumulation */
-#define XXH_ACC_NB (XXH_STRIPE_LEN / sizeof(xxh_u64))
-
-#ifdef XXH_OLD_NAMES
-# define STRIPE_LEN XXH_STRIPE_LEN
-# define ACC_NB XXH_ACC_NB
-#endif
-
-#ifndef XXH_PREFETCH_DIST
-# ifdef __clang__
-# define XXH_PREFETCH_DIST 320
-# else
-# if (XXH_VECTOR == XXH_AVX512)
-# define XXH_PREFETCH_DIST 512
-# else
-# define XXH_PREFETCH_DIST 384
-# endif
-# endif /* __clang__ */
-#endif /* XXH_PREFETCH_DIST */
-
-/*
- * These macros are to generate an XXH3_accumulate() function.
- * The two arguments select the name suffix and target attribute.
- *
- * The name of this symbol is XXH3_accumulate_<name>() and it calls
- * XXH3_accumulate_512_<name>().
- *
- * It may be useful to hand implement this function if the compiler fails to
- * optimize the inline function.
- */
-#define XXH3_ACCUMULATE_TEMPLATE(name) \
-void \
-XXH3_accumulate_##name(xxh_u64* XXH_RESTRICT acc, \
- const xxh_u8* XXH_RESTRICT input, \
- const xxh_u8* XXH_RESTRICT secret, \
- size_t nbStripes) \
-{ \
- size_t n; \
- for (n = 0; n < nbStripes; n++ ) { \
- const xxh_u8* const in = input + n*XXH_STRIPE_LEN; \
- XXH_PREFETCH(in + XXH_PREFETCH_DIST); \
- XXH3_accumulate_512_##name( \
- acc, \
- in, \
- secret + n*XXH_SECRET_CONSUME_RATE); \
- } \
-}
-
-
-XXH_FORCE_INLINE void XXH_writeLE64(void* dst, xxh_u64 v64)
-{
- if (!XXH_CPU_LITTLE_ENDIAN) v64 = XXH_swap64(v64);
- XXH_memcpy(dst, &v64, sizeof(v64));
-}
-
-/* Several intrinsic functions below are supposed to accept __int64 as argument,
- * as documented in https://software.intel.com/sites/landingpage/IntrinsicsGuide/ .
- * However, several environments do not define __int64 type,
- * requiring a workaround.
- */
-#if !defined (__VMS) \
- && (defined (__cplusplus) \
- || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
- typedef int64_t xxh_i64;
-#else
- /* the following type must have a width of 64-bit */
- typedef long long xxh_i64;
-#endif
-
-
-/*
- * XXH3_accumulate_512 is the tightest loop for long inputs, and it is the most optimized.
- *
- * It is a hardened version of UMAC, based off of FARSH's implementation.
- *
- * This was chosen because it adapts quite well to 32-bit, 64-bit, and SIMD
- * implementations, and it is ridiculously fast.
- *
- * We harden it by mixing the original input to the accumulators as well as the product.
- *
- * This means that in the (relatively likely) case of a multiply by zero, the
- * original input is preserved.
- *
- * On 128-bit inputs, we swap 64-bit pairs when we add the input to improve
- * cross-pollination, as otherwise the upper and lower halves would be
- * essentially independent.
- *
- * This doesn't matter on 64-bit hashes since they all get merged together in
- * the end, so we skip the extra step.
- *
- * Both XXH3_64bits and XXH3_128bits use this subroutine.
- */
-
-#if (XXH_VECTOR == XXH_AVX512) \
- || (defined(XXH_DISPATCH_AVX512) && XXH_DISPATCH_AVX512 != 0)
-
-#ifndef XXH_TARGET_AVX512
-# define XXH_TARGET_AVX512 /* disable attribute target */
-#endif
-
-XXH_FORCE_INLINE XXH_TARGET_AVX512 void
-XXH3_accumulate_512_avx512(void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- __m512i* const xacc = (__m512i *) acc;
- XXH_ASSERT((((size_t)acc) & 63) == 0);
- XXH_STATIC_ASSERT(XXH_STRIPE_LEN == sizeof(__m512i));
-
- {
- /* data_vec = input[0]; */
- __m512i const data_vec = _mm512_loadu_si512 (input);
- /* key_vec = secret[0]; */
- __m512i const key_vec = _mm512_loadu_si512 (secret);
- /* data_key = data_vec ^ key_vec; */
- __m512i const data_key = _mm512_xor_si512 (data_vec, key_vec);
- /* data_key_lo = data_key >> 32; */
- __m512i const data_key_lo = _mm512_srli_epi64 (data_key, 32);
- /* product = (data_key & 0xffffffff) * (data_key_lo & 0xffffffff); */
- __m512i const product = _mm512_mul_epu32 (data_key, data_key_lo);
- /* xacc[0] += swap(data_vec); */
- __m512i const data_swap = _mm512_shuffle_epi32(data_vec, (_MM_PERM_ENUM)_MM_SHUFFLE(1, 0, 3, 2));
- __m512i const sum = _mm512_add_epi64(*xacc, data_swap);
- /* xacc[0] += product; */
- *xacc = _mm512_add_epi64(product, sum);
- }
-}
-XXH_FORCE_INLINE XXH_TARGET_AVX512 XXH3_ACCUMULATE_TEMPLATE(avx512)
-
-/*
- * XXH3_scrambleAcc: Scrambles the accumulators to improve mixing.
- *
- * Multiplication isn't perfect, as explained by Google in HighwayHash:
- *
- * // Multiplication mixes/scrambles bytes 0-7 of the 64-bit result to
- * // varying degrees. In descending order of goodness, bytes
- * // 3 4 2 5 1 6 0 7 have quality 228 224 164 160 100 96 36 32.
- * // As expected, the upper and lower bytes are much worse.
- *
- * Source: https://github.com/google/highwayhash/blob/0aaf66b/highwayhash/hh_avx2.h#L291
- *
- * Since our algorithm uses a pseudorandom secret to add some variance into the
- * mix, we don't need to (or want to) mix as often or as much as HighwayHash does.
- *
- * This isn't as tight as XXH3_accumulate, but still written in SIMD to avoid
- * extraction.
- *
- * Both XXH3_64bits and XXH3_128bits use this subroutine.
- */
-
-XXH_FORCE_INLINE XXH_TARGET_AVX512 void
-XXH3_scrambleAcc_avx512(void* XXH_RESTRICT acc, const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 63) == 0);
- XXH_STATIC_ASSERT(XXH_STRIPE_LEN == sizeof(__m512i));
- { __m512i* const xacc = (__m512i*) acc;
- const __m512i prime32 = _mm512_set1_epi32((int)XXH_PRIME32_1);
-
- /* xacc[0] ^= (xacc[0] >> 47) */
- __m512i const acc_vec = *xacc;
- __m512i const shifted = _mm512_srli_epi64 (acc_vec, 47);
- /* xacc[0] ^= secret; */
- __m512i const key_vec = _mm512_loadu_si512 (secret);
- __m512i const data_key = _mm512_ternarylogic_epi32(key_vec, acc_vec, shifted, 0x96 /* key_vec ^ acc_vec ^ shifted */);
-
- /* xacc[0] *= XXH_PRIME32_1; */
- __m512i const data_key_hi = _mm512_srli_epi64 (data_key, 32);
- __m512i const prod_lo = _mm512_mul_epu32 (data_key, prime32);
- __m512i const prod_hi = _mm512_mul_epu32 (data_key_hi, prime32);
- *xacc = _mm512_add_epi64(prod_lo, _mm512_slli_epi64(prod_hi, 32));
- }
-}
-
-XXH_FORCE_INLINE XXH_TARGET_AVX512 void
-XXH3_initCustomSecret_avx512(void* XXH_RESTRICT customSecret, xxh_u64 seed64)
-{
- XXH_STATIC_ASSERT((XXH_SECRET_DEFAULT_SIZE & 63) == 0);
- XXH_STATIC_ASSERT(XXH_SEC_ALIGN == 64);
- XXH_ASSERT(((size_t)customSecret & 63) == 0);
- (void)(&XXH_writeLE64);
- { int const nbRounds = XXH_SECRET_DEFAULT_SIZE / sizeof(__m512i);
- __m512i const seed_pos = _mm512_set1_epi64((xxh_i64)seed64);
- __m512i const seed = _mm512_mask_sub_epi64(seed_pos, 0xAA, _mm512_set1_epi8(0), seed_pos);
-
- const __m512i* const src = (const __m512i*) ((const void*) XXH3_kSecret);
- __m512i* const dest = ( __m512i*) customSecret;
- int i;
- XXH_ASSERT(((size_t)src & 63) == 0); /* control alignment */
- XXH_ASSERT(((size_t)dest & 63) == 0);
- for (i=0; i < nbRounds; ++i) {
- dest[i] = _mm512_add_epi64(_mm512_load_si512(src + i), seed);
- } }
-}
-
-#endif
-
-#if (XXH_VECTOR == XXH_AVX2) \
- || (defined(XXH_DISPATCH_AVX2) && XXH_DISPATCH_AVX2 != 0)
-
-#ifndef XXH_TARGET_AVX2
-# define XXH_TARGET_AVX2 /* disable attribute target */
-#endif
-
-XXH_FORCE_INLINE XXH_TARGET_AVX2 void
-XXH3_accumulate_512_avx2( void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 31) == 0);
- { __m256i* const xacc = (__m256i *) acc;
- /* Unaligned. This is mainly for pointer arithmetic, and because
- * _mm256_loadu_si256 requires a const __m256i * pointer for some reason. */
- const __m256i* const xinput = (const __m256i *) input;
- /* Unaligned. This is mainly for pointer arithmetic, and because
- * _mm256_loadu_si256 requires a const __m256i * pointer for some reason. */
- const __m256i* const xsecret = (const __m256i *) secret;
-
- size_t i;
- for (i=0; i < XXH_STRIPE_LEN/sizeof(__m256i); i++) {
- /* data_vec = xinput[i]; */
- __m256i const data_vec = _mm256_loadu_si256 (xinput+i);
- /* key_vec = xsecret[i]; */
- __m256i const key_vec = _mm256_loadu_si256 (xsecret+i);
- /* data_key = data_vec ^ key_vec; */
- __m256i const data_key = _mm256_xor_si256 (data_vec, key_vec);
- /* data_key_lo = data_key >> 32; */
- __m256i const data_key_lo = _mm256_srli_epi64 (data_key, 32);
- /* product = (data_key & 0xffffffff) * (data_key_lo & 0xffffffff); */
- __m256i const product = _mm256_mul_epu32 (data_key, data_key_lo);
- /* xacc[i] += swap(data_vec); */
- __m256i const data_swap = _mm256_shuffle_epi32(data_vec, _MM_SHUFFLE(1, 0, 3, 2));
- __m256i const sum = _mm256_add_epi64(xacc[i], data_swap);
- /* xacc[i] += product; */
- xacc[i] = _mm256_add_epi64(product, sum);
- } }
-}
-XXH_FORCE_INLINE XXH_TARGET_AVX2 XXH3_ACCUMULATE_TEMPLATE(avx2)
-
-XXH_FORCE_INLINE XXH_TARGET_AVX2 void
-XXH3_scrambleAcc_avx2(void* XXH_RESTRICT acc, const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 31) == 0);
- { __m256i* const xacc = (__m256i*) acc;
- /* Unaligned. This is mainly for pointer arithmetic, and because
- * _mm256_loadu_si256 requires a const __m256i * pointer for some reason. */
- const __m256i* const xsecret = (const __m256i *) secret;
- const __m256i prime32 = _mm256_set1_epi32((int)XXH_PRIME32_1);
-
- size_t i;
- for (i=0; i < XXH_STRIPE_LEN/sizeof(__m256i); i++) {
- /* xacc[i] ^= (xacc[i] >> 47) */
- __m256i const acc_vec = xacc[i];
- __m256i const shifted = _mm256_srli_epi64 (acc_vec, 47);
- __m256i const data_vec = _mm256_xor_si256 (acc_vec, shifted);
- /* xacc[i] ^= xsecret; */
- __m256i const key_vec = _mm256_loadu_si256 (xsecret+i);
- __m256i const data_key = _mm256_xor_si256 (data_vec, key_vec);
-
- /* xacc[i] *= XXH_PRIME32_1; */
- __m256i const data_key_hi = _mm256_srli_epi64 (data_key, 32);
- __m256i const prod_lo = _mm256_mul_epu32 (data_key, prime32);
- __m256i const prod_hi = _mm256_mul_epu32 (data_key_hi, prime32);
- xacc[i] = _mm256_add_epi64(prod_lo, _mm256_slli_epi64(prod_hi, 32));
- }
- }
-}
-
-XXH_FORCE_INLINE XXH_TARGET_AVX2 void XXH3_initCustomSecret_avx2(void* XXH_RESTRICT customSecret, xxh_u64 seed64)
-{
- XXH_STATIC_ASSERT((XXH_SECRET_DEFAULT_SIZE & 31) == 0);
- XXH_STATIC_ASSERT((XXH_SECRET_DEFAULT_SIZE / sizeof(__m256i)) == 6);
- XXH_STATIC_ASSERT(XXH_SEC_ALIGN <= 64);
- (void)(&XXH_writeLE64);
- XXH_PREFETCH(customSecret);
- { __m256i const seed = _mm256_set_epi64x((xxh_i64)(0U - seed64), (xxh_i64)seed64, (xxh_i64)(0U - seed64), (xxh_i64)seed64);
-
- const __m256i* const src = (const __m256i*) ((const void*) XXH3_kSecret);
- __m256i* dest = ( __m256i*) customSecret;
-
-# if defined(__GNUC__) || defined(__clang__)
- /*
- * On GCC & Clang, marking 'dest' as modified will cause the compiler:
- * - do not extract the secret from sse registers in the internal loop
- * - use less common registers, and avoid pushing these reg into stack
- */
- XXH_COMPILER_GUARD(dest);
-# endif
- XXH_ASSERT(((size_t)src & 31) == 0); /* control alignment */
- XXH_ASSERT(((size_t)dest & 31) == 0);
-
- /* GCC -O2 need unroll loop manually */
- dest[0] = _mm256_add_epi64(_mm256_load_si256(src+0), seed);
- dest[1] = _mm256_add_epi64(_mm256_load_si256(src+1), seed);
- dest[2] = _mm256_add_epi64(_mm256_load_si256(src+2), seed);
- dest[3] = _mm256_add_epi64(_mm256_load_si256(src+3), seed);
- dest[4] = _mm256_add_epi64(_mm256_load_si256(src+4), seed);
- dest[5] = _mm256_add_epi64(_mm256_load_si256(src+5), seed);
- }
-}
-
-#endif
-
-/* x86dispatch always generates SSE2 */
-#if (XXH_VECTOR == XXH_SSE2) || defined(XXH_X86DISPATCH)
-
-#ifndef XXH_TARGET_SSE2
-# define XXH_TARGET_SSE2 /* disable attribute target */
-#endif
-
-XXH_FORCE_INLINE XXH_TARGET_SSE2 void
-XXH3_accumulate_512_sse2( void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- /* SSE2 is just a half-scale version of the AVX2 version. */
- XXH_ASSERT((((size_t)acc) & 15) == 0);
- { __m128i* const xacc = (__m128i *) acc;
- /* Unaligned. This is mainly for pointer arithmetic, and because
- * _mm_loadu_si128 requires a const __m128i * pointer for some reason. */
- const __m128i* const xinput = (const __m128i *) input;
- /* Unaligned. This is mainly for pointer arithmetic, and because
- * _mm_loadu_si128 requires a const __m128i * pointer for some reason. */
- const __m128i* const xsecret = (const __m128i *) secret;
-
- size_t i;
- for (i=0; i < XXH_STRIPE_LEN/sizeof(__m128i); i++) {
- /* data_vec = xinput[i]; */
- __m128i const data_vec = _mm_loadu_si128 (xinput+i);
- /* key_vec = xsecret[i]; */
- __m128i const key_vec = _mm_loadu_si128 (xsecret+i);
- /* data_key = data_vec ^ key_vec; */
- __m128i const data_key = _mm_xor_si128 (data_vec, key_vec);
- /* data_key_lo = data_key >> 32; */
- __m128i const data_key_lo = _mm_shuffle_epi32 (data_key, _MM_SHUFFLE(0, 3, 0, 1));
- /* product = (data_key & 0xffffffff) * (data_key_lo & 0xffffffff); */
- __m128i const product = _mm_mul_epu32 (data_key, data_key_lo);
- /* xacc[i] += swap(data_vec); */
- __m128i const data_swap = _mm_shuffle_epi32(data_vec, _MM_SHUFFLE(1,0,3,2));
- __m128i const sum = _mm_add_epi64(xacc[i], data_swap);
- /* xacc[i] += product; */
- xacc[i] = _mm_add_epi64(product, sum);
- } }
-}
-XXH_FORCE_INLINE XXH_TARGET_SSE2 XXH3_ACCUMULATE_TEMPLATE(sse2)
-
-XXH_FORCE_INLINE XXH_TARGET_SSE2 void
-XXH3_scrambleAcc_sse2(void* XXH_RESTRICT acc, const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 15) == 0);
- { __m128i* const xacc = (__m128i*) acc;
- /* Unaligned. This is mainly for pointer arithmetic, and because
- * _mm_loadu_si128 requires a const __m128i * pointer for some reason. */
- const __m128i* const xsecret = (const __m128i *) secret;
- const __m128i prime32 = _mm_set1_epi32((int)XXH_PRIME32_1);
-
- size_t i;
- for (i=0; i < XXH_STRIPE_LEN/sizeof(__m128i); i++) {
- /* xacc[i] ^= (xacc[i] >> 47) */
- __m128i const acc_vec = xacc[i];
- __m128i const shifted = _mm_srli_epi64 (acc_vec, 47);
- __m128i const data_vec = _mm_xor_si128 (acc_vec, shifted);
- /* xacc[i] ^= xsecret[i]; */
- __m128i const key_vec = _mm_loadu_si128 (xsecret+i);
- __m128i const data_key = _mm_xor_si128 (data_vec, key_vec);
-
- /* xacc[i] *= XXH_PRIME32_1; */
- __m128i const data_key_hi = _mm_shuffle_epi32 (data_key, _MM_SHUFFLE(0, 3, 0, 1));
- __m128i const prod_lo = _mm_mul_epu32 (data_key, prime32);
- __m128i const prod_hi = _mm_mul_epu32 (data_key_hi, prime32);
- xacc[i] = _mm_add_epi64(prod_lo, _mm_slli_epi64(prod_hi, 32));
- }
- }
-}
-
-XXH_FORCE_INLINE XXH_TARGET_SSE2 void XXH3_initCustomSecret_sse2(void* XXH_RESTRICT customSecret, xxh_u64 seed64)
-{
- XXH_STATIC_ASSERT((XXH_SECRET_DEFAULT_SIZE & 15) == 0);
- (void)(&XXH_writeLE64);
- { int const nbRounds = XXH_SECRET_DEFAULT_SIZE / sizeof(__m128i);
-
-# if defined(_MSC_VER) && defined(_M_IX86) && _MSC_VER < 1900
- /* MSVC 32bit mode does not support _mm_set_epi64x before 2015 */
- XXH_ALIGN(16) const xxh_i64 seed64x2[2] = { (xxh_i64)seed64, (xxh_i64)(0U - seed64) };
- __m128i const seed = _mm_load_si128((__m128i const*)seed64x2);
-# else
- __m128i const seed = _mm_set_epi64x((xxh_i64)(0U - seed64), (xxh_i64)seed64);
-# endif
- int i;
-
- const void* const src16 = XXH3_kSecret;
- __m128i* dst16 = (__m128i*) customSecret;
-# if defined(__GNUC__) || defined(__clang__)
- /*
- * On GCC & Clang, marking 'dest' as modified will cause the compiler:
- * - do not extract the secret from sse registers in the internal loop
- * - use less common registers, and avoid pushing these reg into stack
- */
- XXH_COMPILER_GUARD(dst16);
-# endif
- XXH_ASSERT(((size_t)src16 & 15) == 0); /* control alignment */
- XXH_ASSERT(((size_t)dst16 & 15) == 0);
-
- for (i=0; i < nbRounds; ++i) {
- dst16[i] = _mm_add_epi64(_mm_load_si128((const __m128i *)src16+i), seed);
- } }
-}
-
-#endif
-
-#if (XXH_VECTOR == XXH_NEON)
-
-/* forward declarations for the scalar routines */
-XXH_FORCE_INLINE void
-XXH3_scalarRound(void* XXH_RESTRICT acc, void const* XXH_RESTRICT input,
- void const* XXH_RESTRICT secret, size_t lane);
-
-XXH_FORCE_INLINE void
-XXH3_scalarScrambleRound(void* XXH_RESTRICT acc,
- void const* XXH_RESTRICT secret, size_t lane);
-
-/*!
- * @internal
- * @brief The bulk processing loop for NEON and WASM SIMD128.
- *
- * The NEON code path is actually partially scalar when running on AArch64. This
- * is to optimize the pipelining and can have up to 15% speedup depending on the
- * CPU, and it also mitigates some GCC codegen issues.
- *
- * @see XXH3_NEON_LANES for configuring this and details about this optimization.
- *
- * NEON's 32-bit to 64-bit long multiply takes a half vector of 32-bit
- * integers instead of the other platforms which mask full 64-bit vectors,
- * so the setup is more complicated than just shifting right.
- *
- * Additionally, there is an optimization for 4 lanes at once noted below.
- *
- * Since, as stated, the most optimal amount of lanes for Cortexes is 6,
- * there needs to be *three* versions of the accumulate operation used
- * for the remaining 2 lanes.
- *
- * WASM's SIMD128 uses SIMDe's arm_neon.h polyfill because the intrinsics overlap
- * nearly perfectly.
- */
-
-XXH_FORCE_INLINE void
-XXH3_accumulate_512_neon( void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 15) == 0);
- XXH_STATIC_ASSERT(XXH3_NEON_LANES > 0 && XXH3_NEON_LANES <= XXH_ACC_NB && XXH3_NEON_LANES % 2 == 0);
- { /* GCC for darwin arm64 does not like aliasing here */
- xxh_aliasing_uint64x2_t* const xacc = (xxh_aliasing_uint64x2_t*) acc;
- /* We don't use a uint32x4_t pointer because it causes bus errors on ARMv7. */
- uint8_t const* xinput = (const uint8_t *) input;
- uint8_t const* xsecret = (const uint8_t *) secret;
-
- size_t i;
-#ifdef __wasm_simd128__
- /*
- * On WASM SIMD128, Clang emits direct address loads when XXH3_kSecret
- * is constant propagated, which results in it converting it to this
- * inside the loop:
- *
- * a = v128.load(XXH3_kSecret + 0 + $secret_offset, offset = 0)
- * b = v128.load(XXH3_kSecret + 16 + $secret_offset, offset = 0)
- * ...
- *
- * This requires a full 32-bit address immediate (and therefore a 6 byte
- * instruction) as well as an add for each offset.
- *
- * Putting an asm guard prevents it from folding (at the cost of losing
- * the alignment hint), and uses the free offset in `v128.load` instead
- * of adding secret_offset each time which overall reduces code size by
- * about a kilobyte and improves performance.
- */
- XXH_COMPILER_GUARD(xsecret);
-#endif
- /* Scalar lanes use the normal scalarRound routine */
- for (i = XXH3_NEON_LANES; i < XXH_ACC_NB; i++) {
- XXH3_scalarRound(acc, input, secret, i);
- }
- i = 0;
- /* 4 NEON lanes at a time. */
- for (; i+1 < XXH3_NEON_LANES / 2; i+=2) {
- /* data_vec = xinput[i]; */
- uint64x2_t data_vec_1 = XXH_vld1q_u64(xinput + (i * 16));
- uint64x2_t data_vec_2 = XXH_vld1q_u64(xinput + ((i+1) * 16));
- /* key_vec = xsecret[i]; */
- uint64x2_t key_vec_1 = XXH_vld1q_u64(xsecret + (i * 16));
- uint64x2_t key_vec_2 = XXH_vld1q_u64(xsecret + ((i+1) * 16));
- /* data_swap = swap(data_vec) */
- uint64x2_t data_swap_1 = vextq_u64(data_vec_1, data_vec_1, 1);
- uint64x2_t data_swap_2 = vextq_u64(data_vec_2, data_vec_2, 1);
- /* data_key = data_vec ^ key_vec; */
- uint64x2_t data_key_1 = veorq_u64(data_vec_1, key_vec_1);
- uint64x2_t data_key_2 = veorq_u64(data_vec_2, key_vec_2);
-
- /*
- * If we reinterpret the 64x2 vectors as 32x4 vectors, we can use a
- * de-interleave operation for 4 lanes in 1 step with `vuzpq_u32` to
- * get one vector with the low 32 bits of each lane, and one vector
- * with the high 32 bits of each lane.
- *
- * The intrinsic returns a double vector because the original ARMv7-a
- * instruction modified both arguments in place. AArch64 and SIMD128 emit
- * two instructions from this intrinsic.
- *
- * [ dk11L | dk11H | dk12L | dk12H ] -> [ dk11L | dk12L | dk21L | dk22L ]
- * [ dk21L | dk21H | dk22L | dk22H ] -> [ dk11H | dk12H | dk21H | dk22H ]
- */
- uint32x4x2_t unzipped = vuzpq_u32(
- vreinterpretq_u32_u64(data_key_1),
- vreinterpretq_u32_u64(data_key_2)
- );
- /* data_key_lo = data_key & 0xFFFFFFFF */
- uint32x4_t data_key_lo = unzipped.val[0];
- /* data_key_hi = data_key >> 32 */
- uint32x4_t data_key_hi = unzipped.val[1];
- /*
- * Then, we can split the vectors horizontally and multiply which, as for most
- * widening intrinsics, have a variant that works on both high half vectors
- * for free on AArch64. A similar instruction is available on SIMD128.
- *
- * sum = data_swap + (u64x2) data_key_lo * (u64x2) data_key_hi
- */
- uint64x2_t sum_1 = XXH_vmlal_low_u32(data_swap_1, data_key_lo, data_key_hi);
- uint64x2_t sum_2 = XXH_vmlal_high_u32(data_swap_2, data_key_lo, data_key_hi);
- /*
- * Clang reorders
- * a += b * c; // umlal swap.2d, dkl.2s, dkh.2s
- * c += a; // add acc.2d, acc.2d, swap.2d
- * to
- * c += a; // add acc.2d, acc.2d, swap.2d
- * c += b * c; // umlal acc.2d, dkl.2s, dkh.2s
- *
- * While it would make sense in theory since the addition is faster,
- * for reasons likely related to umlal being limited to certain NEON
- * pipelines, this is worse. A compiler guard fixes this.
- */
- XXH_COMPILER_GUARD_CLANG_NEON(sum_1);
- XXH_COMPILER_GUARD_CLANG_NEON(sum_2);
- /* xacc[i] = acc_vec + sum; */
- xacc[i] = vaddq_u64(xacc[i], sum_1);
- xacc[i+1] = vaddq_u64(xacc[i+1], sum_2);
- }
- /* Operate on the remaining NEON lanes 2 at a time. */
- for (; i < XXH3_NEON_LANES / 2; i++) {
- /* data_vec = xinput[i]; */
- uint64x2_t data_vec = XXH_vld1q_u64(xinput + (i * 16));
- /* key_vec = xsecret[i]; */
- uint64x2_t key_vec = XXH_vld1q_u64(xsecret + (i * 16));
- /* acc_vec_2 = swap(data_vec) */
- uint64x2_t data_swap = vextq_u64(data_vec, data_vec, 1);
- /* data_key = data_vec ^ key_vec; */
- uint64x2_t data_key = veorq_u64(data_vec, key_vec);
- /* For two lanes, just use VMOVN and VSHRN. */
- /* data_key_lo = data_key & 0xFFFFFFFF; */
- uint32x2_t data_key_lo = vmovn_u64(data_key);
- /* data_key_hi = data_key >> 32; */
- uint32x2_t data_key_hi = vshrn_n_u64(data_key, 32);
- /* sum = data_swap + (u64x2) data_key_lo * (u64x2) data_key_hi; */
- uint64x2_t sum = vmlal_u32(data_swap, data_key_lo, data_key_hi);
- /* Same Clang workaround as before */
- XXH_COMPILER_GUARD_CLANG_NEON(sum);
- /* xacc[i] = acc_vec + sum; */
- xacc[i] = vaddq_u64 (xacc[i], sum);
- }
- }
-}
-XXH_FORCE_INLINE XXH3_ACCUMULATE_TEMPLATE(neon)
-
-XXH_FORCE_INLINE void
-XXH3_scrambleAcc_neon(void* XXH_RESTRICT acc, const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 15) == 0);
-
- { xxh_aliasing_uint64x2_t* xacc = (xxh_aliasing_uint64x2_t*) acc;
- uint8_t const* xsecret = (uint8_t const*) secret;
-
- size_t i;
- /* WASM uses operator overloads and doesn't need these. */
-#ifndef __wasm_simd128__
- /* { prime32_1, prime32_1 } */
- uint32x2_t const kPrimeLo = vdup_n_u32(XXH_PRIME32_1);
- /* { 0, prime32_1, 0, prime32_1 } */
- uint32x4_t const kPrimeHi = vreinterpretq_u32_u64(vdupq_n_u64((xxh_u64)XXH_PRIME32_1 << 32));
-#endif
-
- /* AArch64 uses both scalar and neon at the same time */
- for (i = XXH3_NEON_LANES; i < XXH_ACC_NB; i++) {
- XXH3_scalarScrambleRound(acc, secret, i);
- }
- for (i=0; i < XXH3_NEON_LANES / 2; i++) {
- /* xacc[i] ^= (xacc[i] >> 47); */
- uint64x2_t acc_vec = xacc[i];
- uint64x2_t shifted = vshrq_n_u64(acc_vec, 47);
- uint64x2_t data_vec = veorq_u64(acc_vec, shifted);
-
- /* xacc[i] ^= xsecret[i]; */
- uint64x2_t key_vec = XXH_vld1q_u64(xsecret + (i * 16));
- uint64x2_t data_key = veorq_u64(data_vec, key_vec);
- /* xacc[i] *= XXH_PRIME32_1 */
-#ifdef __wasm_simd128__
- /* SIMD128 has multiply by u64x2, use it instead of expanding and scalarizing */
- xacc[i] = data_key * XXH_PRIME32_1;
-#else
- /*
- * Expanded version with portable NEON intrinsics
- *
- * lo(x) * lo(y) + (hi(x) * lo(y) << 32)
- *
- * prod_hi = hi(data_key) * lo(prime) << 32
- *
- * Since we only need 32 bits of this multiply a trick can be used, reinterpreting the vector
- * as a uint32x4_t and multiplying by { 0, prime, 0, prime } to cancel out the unwanted bits
- * and avoid the shift.
- */
- uint32x4_t prod_hi = vmulq_u32 (vreinterpretq_u32_u64(data_key), kPrimeHi);
- /* Extract low bits for vmlal_u32 */
- uint32x2_t data_key_lo = vmovn_u64(data_key);
- /* xacc[i] = prod_hi + lo(data_key) * XXH_PRIME32_1; */
- xacc[i] = vmlal_u32(vreinterpretq_u64_u32(prod_hi), data_key_lo, kPrimeLo);
-#endif
- }
- }
-}
-#endif
-
-#if (XXH_VECTOR == XXH_VSX)
-
-XXH_FORCE_INLINE void
-XXH3_accumulate_512_vsx( void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- /* presumed aligned */
- xxh_aliasing_u64x2* const xacc = (xxh_aliasing_u64x2*) acc;
- xxh_u8 const* const xinput = (xxh_u8 const*) input; /* no alignment restriction */
- xxh_u8 const* const xsecret = (xxh_u8 const*) secret; /* no alignment restriction */
- xxh_u64x2 const v32 = { 32, 32 };
- size_t i;
- for (i = 0; i < XXH_STRIPE_LEN / sizeof(xxh_u64x2); i++) {
- /* data_vec = xinput[i]; */
- xxh_u64x2 const data_vec = XXH_vec_loadu(xinput + 16*i);
- /* key_vec = xsecret[i]; */
- xxh_u64x2 const key_vec = XXH_vec_loadu(xsecret + 16*i);
- xxh_u64x2 const data_key = data_vec ^ key_vec;
- /* shuffled = (data_key << 32) | (data_key >> 32); */
- xxh_u32x4 const shuffled = (xxh_u32x4)vec_rl(data_key, v32);
- /* product = ((xxh_u64x2)data_key & 0xFFFFFFFF) * ((xxh_u64x2)shuffled & 0xFFFFFFFF); */
- xxh_u64x2 const product = XXH_vec_mulo((xxh_u32x4)data_key, shuffled);
- /* acc_vec = xacc[i]; */
- xxh_u64x2 acc_vec = xacc[i];
- acc_vec += product;
-
- /* swap high and low halves */
-#ifdef __s390x__
- acc_vec += vec_permi(data_vec, data_vec, 2);
-#else
- acc_vec += vec_xxpermdi(data_vec, data_vec, 2);
-#endif
- xacc[i] = acc_vec;
- }
-}
-XXH_FORCE_INLINE XXH3_ACCUMULATE_TEMPLATE(vsx)
-
-XXH_FORCE_INLINE void
-XXH3_scrambleAcc_vsx(void* XXH_RESTRICT acc, const void* XXH_RESTRICT secret)
-{
- XXH_ASSERT((((size_t)acc) & 15) == 0);
-
- { xxh_aliasing_u64x2* const xacc = (xxh_aliasing_u64x2*) acc;
- const xxh_u8* const xsecret = (const xxh_u8*) secret;
- /* constants */
- xxh_u64x2 const v32 = { 32, 32 };
- xxh_u64x2 const v47 = { 47, 47 };
- xxh_u32x4 const prime = { XXH_PRIME32_1, XXH_PRIME32_1, XXH_PRIME32_1, XXH_PRIME32_1 };
- size_t i;
- for (i = 0; i < XXH_STRIPE_LEN / sizeof(xxh_u64x2); i++) {
- /* xacc[i] ^= (xacc[i] >> 47); */
- xxh_u64x2 const acc_vec = xacc[i];
- xxh_u64x2 const data_vec = acc_vec ^ (acc_vec >> v47);
-
- /* xacc[i] ^= xsecret[i]; */
- xxh_u64x2 const key_vec = XXH_vec_loadu(xsecret + 16*i);
- xxh_u64x2 const data_key = data_vec ^ key_vec;
-
- /* xacc[i] *= XXH_PRIME32_1 */
- /* prod_lo = ((xxh_u64x2)data_key & 0xFFFFFFFF) * ((xxh_u64x2)prime & 0xFFFFFFFF); */
- xxh_u64x2 const prod_even = XXH_vec_mule((xxh_u32x4)data_key, prime);
- /* prod_hi = ((xxh_u64x2)data_key >> 32) * ((xxh_u64x2)prime >> 32); */
- xxh_u64x2 const prod_odd = XXH_vec_mulo((xxh_u32x4)data_key, prime);
- xacc[i] = prod_odd + (prod_even << v32);
- } }
-}
-
-#endif
-
-#if (XXH_VECTOR == XXH_SVE)
-
-XXH_FORCE_INLINE void
-XXH3_accumulate_512_sve( void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- uint64_t *xacc = (uint64_t *)acc;
- const uint64_t *xinput = (const uint64_t *)(const void *)input;
- const uint64_t *xsecret = (const uint64_t *)(const void *)secret;
- svuint64_t kSwap = sveor_n_u64_z(svptrue_b64(), svindex_u64(0, 1), 1);
- uint64_t element_count = svcntd();
- if (element_count >= 8) {
- svbool_t mask = svptrue_pat_b64(SV_VL8);
- svuint64_t vacc = svld1_u64(mask, xacc);
- ACCRND(vacc, 0);
- svst1_u64(mask, xacc, vacc);
- } else if (element_count == 2) { /* sve128 */
- svbool_t mask = svptrue_pat_b64(SV_VL2);
- svuint64_t acc0 = svld1_u64(mask, xacc + 0);
- svuint64_t acc1 = svld1_u64(mask, xacc + 2);
- svuint64_t acc2 = svld1_u64(mask, xacc + 4);
- svuint64_t acc3 = svld1_u64(mask, xacc + 6);
- ACCRND(acc0, 0);
- ACCRND(acc1, 2);
- ACCRND(acc2, 4);
- ACCRND(acc3, 6);
- svst1_u64(mask, xacc + 0, acc0);
- svst1_u64(mask, xacc + 2, acc1);
- svst1_u64(mask, xacc + 4, acc2);
- svst1_u64(mask, xacc + 6, acc3);
- } else {
- svbool_t mask = svptrue_pat_b64(SV_VL4);
- svuint64_t acc0 = svld1_u64(mask, xacc + 0);
- svuint64_t acc1 = svld1_u64(mask, xacc + 4);
- ACCRND(acc0, 0);
- ACCRND(acc1, 4);
- svst1_u64(mask, xacc + 0, acc0);
- svst1_u64(mask, xacc + 4, acc1);
- }
-}
-
-XXH_FORCE_INLINE void
-XXH3_accumulate_sve(xxh_u64* XXH_RESTRICT acc,
- const xxh_u8* XXH_RESTRICT input,
- const xxh_u8* XXH_RESTRICT secret,
- size_t nbStripes)
-{
- if (nbStripes != 0) {
- uint64_t *xacc = (uint64_t *)acc;
- const uint64_t *xinput = (const uint64_t *)(const void *)input;
- const uint64_t *xsecret = (const uint64_t *)(const void *)secret;
- svuint64_t kSwap = sveor_n_u64_z(svptrue_b64(), svindex_u64(0, 1), 1);
- uint64_t element_count = svcntd();
- if (element_count >= 8) {
- svbool_t mask = svptrue_pat_b64(SV_VL8);
- svuint64_t vacc = svld1_u64(mask, xacc + 0);
- do {
- /* svprfd(svbool_t, void *, enum svfprop); */
- svprfd(mask, xinput + 128, SV_PLDL1STRM);
- ACCRND(vacc, 0);
- xinput += 8;
- xsecret += 1;
- nbStripes--;
- } while (nbStripes != 0);
-
- svst1_u64(mask, xacc + 0, vacc);
- } else if (element_count == 2) { /* sve128 */
- svbool_t mask = svptrue_pat_b64(SV_VL2);
- svuint64_t acc0 = svld1_u64(mask, xacc + 0);
- svuint64_t acc1 = svld1_u64(mask, xacc + 2);
- svuint64_t acc2 = svld1_u64(mask, xacc + 4);
- svuint64_t acc3 = svld1_u64(mask, xacc + 6);
- do {
- svprfd(mask, xinput + 128, SV_PLDL1STRM);
- ACCRND(acc0, 0);
- ACCRND(acc1, 2);
- ACCRND(acc2, 4);
- ACCRND(acc3, 6);
- xinput += 8;
- xsecret += 1;
- nbStripes--;
- } while (nbStripes != 0);
-
- svst1_u64(mask, xacc + 0, acc0);
- svst1_u64(mask, xacc + 2, acc1);
- svst1_u64(mask, xacc + 4, acc2);
- svst1_u64(mask, xacc + 6, acc3);
- } else {
- svbool_t mask = svptrue_pat_b64(SV_VL4);
- svuint64_t acc0 = svld1_u64(mask, xacc + 0);
- svuint64_t acc1 = svld1_u64(mask, xacc + 4);
- do {
- svprfd(mask, xinput + 128, SV_PLDL1STRM);
- ACCRND(acc0, 0);
- ACCRND(acc1, 4);
- xinput += 8;
- xsecret += 1;
- nbStripes--;
- } while (nbStripes != 0);
-
- svst1_u64(mask, xacc + 0, acc0);
- svst1_u64(mask, xacc + 4, acc1);
- }
- }
-}
-
-#endif
-
-/* scalar variants - universal */
-
-#if defined(__aarch64__) && (defined(__GNUC__) || defined(__clang__))
-/*
- * In XXH3_scalarRound(), GCC and Clang have a similar codegen issue, where they
- * emit an excess mask and a full 64-bit multiply-add (MADD X-form).
- *
- * While this might not seem like much, as AArch64 is a 64-bit architecture, only
- * big Cortex designs have a full 64-bit multiplier.
- *
- * On the little cores, the smaller 32-bit multiplier is used, and full 64-bit
- * multiplies expand to 2-3 multiplies in microcode. This has a major penalty
- * of up to 4 latency cycles and 2 stall cycles in the multiply pipeline.
- *
- * Thankfully, AArch64 still provides the 32-bit long multiply-add (UMADDL) which does
- * not have this penalty and does the mask automatically.
- */
-XXH_FORCE_INLINE xxh_u64
-XXH_mult32to64_add64(xxh_u64 lhs, xxh_u64 rhs, xxh_u64 acc)
-{
- xxh_u64 ret;
- /* note: %x = 64-bit register, %w = 32-bit register */
- __asm__("umaddl %x0, %w1, %w2, %x3" : "=r" (ret) : "r" (lhs), "r" (rhs), "r" (acc));
- return ret;
-}
-#else
-XXH_FORCE_INLINE xxh_u64
-XXH_mult32to64_add64(xxh_u64 lhs, xxh_u64 rhs, xxh_u64 acc)
-{
- return XXH_mult32to64((xxh_u32)lhs, (xxh_u32)rhs) + acc;
-}
-#endif
-
-/*!
- * @internal
- * @brief Scalar round for @ref XXH3_accumulate_512_scalar().
- *
- * This is extracted to its own function because the NEON path uses a combination
- * of NEON and scalar.
- */
-XXH_FORCE_INLINE void
-XXH3_scalarRound(void* XXH_RESTRICT acc,
- void const* XXH_RESTRICT input,
- void const* XXH_RESTRICT secret,
- size_t lane)
-{
- xxh_u64* xacc = (xxh_u64*) acc;
- xxh_u8 const* xinput = (xxh_u8 const*) input;
- xxh_u8 const* xsecret = (xxh_u8 const*) secret;
- XXH_ASSERT(lane < XXH_ACC_NB);
- XXH_ASSERT(((size_t)acc & (XXH_ACC_ALIGN-1)) == 0);
- {
- xxh_u64 const data_val = XXH_readLE64(xinput + lane * 8);
- xxh_u64 const data_key = data_val ^ XXH_readLE64(xsecret + lane * 8);
- xacc[lane ^ 1] += data_val; /* swap adjacent lanes */
- xacc[lane] = XXH_mult32to64_add64(data_key /* & 0xFFFFFFFF */, data_key >> 32, xacc[lane]);
- }
-}
-
-/*!
- * @internal
- * @brief Processes a 64 byte block of data using the scalar path.
- */
-XXH_FORCE_INLINE void
-XXH3_accumulate_512_scalar(void* XXH_RESTRICT acc,
- const void* XXH_RESTRICT input,
- const void* XXH_RESTRICT secret)
-{
- size_t i;
- /* ARM GCC refuses to unroll this loop, resulting in a 24% slowdown on ARMv6. */
-#if defined(__GNUC__) && !defined(__clang__) \
- && (defined(__arm__) || defined(__thumb2__)) \
- && defined(__ARM_FEATURE_UNALIGNED) /* no unaligned access just wastes bytes */ \
- && XXH_SIZE_OPT <= 0
-# pragma GCC unroll 8
-#endif
- for (i=0; i < XXH_ACC_NB; i++) {
- XXH3_scalarRound(acc, input, secret, i);
- }
-}
-XXH_FORCE_INLINE XXH3_ACCUMULATE_TEMPLATE(scalar)
-
-/*!
- * @internal
- * @brief Scalar scramble step for @ref XXH3_scrambleAcc_scalar().
- *
- * This is extracted to its own function because the NEON path uses a combination
- * of NEON and scalar.
- */
-XXH_FORCE_INLINE void
-XXH3_scalarScrambleRound(void* XXH_RESTRICT acc,
- void const* XXH_RESTRICT secret,
- size_t lane)
-{
- xxh_u64* const xacc = (xxh_u64*) acc; /* presumed aligned */
- const xxh_u8* const xsecret = (const xxh_u8*) secret; /* no alignment restriction */
- XXH_ASSERT((((size_t)acc) & (XXH_ACC_ALIGN-1)) == 0);
- XXH_ASSERT(lane < XXH_ACC_NB);
- {
- xxh_u64 const key64 = XXH_readLE64(xsecret + lane * 8);
- xxh_u64 acc64 = xacc[lane];
- acc64 = XXH_xorshift64(acc64, 47);
- acc64 ^= key64;
- acc64 *= XXH_PRIME32_1;
- xacc[lane] = acc64;
- }
-}
-
-/*!
- * @internal
- * @brief Scrambles the accumulators after a large chunk has been read
- */
-XXH_FORCE_INLINE void
-XXH3_scrambleAcc_scalar(void* XXH_RESTRICT acc, const void* XXH_RESTRICT secret)
-{
- size_t i;
- for (i=0; i < XXH_ACC_NB; i++) {
- XXH3_scalarScrambleRound(acc, secret, i);
- }
-}
-
-XXH_FORCE_INLINE void
-XXH3_initCustomSecret_scalar(void* XXH_RESTRICT customSecret, xxh_u64 seed64)
-{
- /*
- * We need a separate pointer for the hack below,
- * which requires a non-const pointer.
- * Any decent compiler will optimize this out otherwise.
- */
- const xxh_u8* kSecretPtr = XXH3_kSecret;
- XXH_STATIC_ASSERT((XXH_SECRET_DEFAULT_SIZE & 15) == 0);
-
-#if defined(__GNUC__) && defined(__aarch64__)
- /*
- * UGLY HACK:
- * GCC and Clang generate a bunch of MOV/MOVK pairs for aarch64, and they are
- * placed sequentially, in order, at the top of the unrolled loop.
- *
- * While MOVK is great for generating constants (2 cycles for a 64-bit
- * constant compared to 4 cycles for LDR), it fights for bandwidth with
- * the arithmetic instructions.
- *
- * I L S
- * MOVK
- * MOVK
- * MOVK
- * MOVK
- * ADD
- * SUB STR
- * STR
- * By forcing loads from memory (as the asm line causes the compiler to assume
- * that XXH3_kSecretPtr has been changed), the pipelines are used more
- * efficiently:
- * I L S
- * LDR
- * ADD LDR
- * SUB STR
- * STR
- *
- * See XXH3_NEON_LANES for details on the pipsline.
- *
- * XXH3_64bits_withSeed, len == 256, Snapdragon 835
- * without hack: 2654.4 MB/s
- * with hack: 3202.9 MB/s
- */
- XXH_COMPILER_GUARD(kSecretPtr);
-#endif
- { int const nbRounds = XXH_SECRET_DEFAULT_SIZE / 16;
- int i;
- for (i=0; i < nbRounds; i++) {
- /*
- * The asm hack causes the compiler to assume that kSecretPtr aliases with
- * customSecret, and on aarch64, this prevented LDP from merging two
- * loads together for free. Putting the loads together before the stores
- * properly generates LDP.
- */
- xxh_u64 lo = XXH_readLE64(kSecretPtr + 16*i) + seed64;
- xxh_u64 hi = XXH_readLE64(kSecretPtr + 16*i + 8) - seed64;
- XXH_writeLE64((xxh_u8*)customSecret + 16*i, lo);
- XXH_writeLE64((xxh_u8*)customSecret + 16*i + 8, hi);
- } }
-}
-
-
-typedef void (*XXH3_f_accumulate)(xxh_u64* XXH_RESTRICT, const xxh_u8* XXH_RESTRICT, const xxh_u8* XXH_RESTRICT, size_t);
-typedef void (*XXH3_f_scrambleAcc)(void* XXH_RESTRICT, const void*);
-typedef void (*XXH3_f_initCustomSecret)(void* XXH_RESTRICT, xxh_u64);
-
-
-#if (XXH_VECTOR == XXH_AVX512)
-
-#define XXH3_accumulate_512 XXH3_accumulate_512_avx512
-#define XXH3_accumulate XXH3_accumulate_avx512
-#define XXH3_scrambleAcc XXH3_scrambleAcc_avx512
-#define XXH3_initCustomSecret XXH3_initCustomSecret_avx512
-
-#elif (XXH_VECTOR == XXH_AVX2)
-
-#define XXH3_accumulate_512 XXH3_accumulate_512_avx2
-#define XXH3_accumulate XXH3_accumulate_avx2
-#define XXH3_scrambleAcc XXH3_scrambleAcc_avx2
-#define XXH3_initCustomSecret XXH3_initCustomSecret_avx2
-
-#elif (XXH_VECTOR == XXH_SSE2)
-
-#define XXH3_accumulate_512 XXH3_accumulate_512_sse2
-#define XXH3_accumulate XXH3_accumulate_sse2
-#define XXH3_scrambleAcc XXH3_scrambleAcc_sse2
-#define XXH3_initCustomSecret XXH3_initCustomSecret_sse2
-
-#elif (XXH_VECTOR == XXH_NEON)
-
-#define XXH3_accumulate_512 XXH3_accumulate_512_neon
-#define XXH3_accumulate XXH3_accumulate_neon
-#define XXH3_scrambleAcc XXH3_scrambleAcc_neon
-#define XXH3_initCustomSecret XXH3_initCustomSecret_scalar
-
-#elif (XXH_VECTOR == XXH_VSX)
-
-#define XXH3_accumulate_512 XXH3_accumulate_512_vsx
-#define XXH3_accumulate XXH3_accumulate_vsx
-#define XXH3_scrambleAcc XXH3_scrambleAcc_vsx
-#define XXH3_initCustomSecret XXH3_initCustomSecret_scalar
-
-#elif (XXH_VECTOR == XXH_SVE)
-#define XXH3_accumulate_512 XXH3_accumulate_512_sve
-#define XXH3_accumulate XXH3_accumulate_sve
-#define XXH3_scrambleAcc XXH3_scrambleAcc_scalar
-#define XXH3_initCustomSecret XXH3_initCustomSecret_scalar
-
-#else /* scalar */
-
-#define XXH3_accumulate_512 XXH3_accumulate_512_scalar
-#define XXH3_accumulate XXH3_accumulate_scalar
-#define XXH3_scrambleAcc XXH3_scrambleAcc_scalar
-#define XXH3_initCustomSecret XXH3_initCustomSecret_scalar
-
-#endif
-
-#if XXH_SIZE_OPT >= 1 /* don't do SIMD for initialization */
-# undef XXH3_initCustomSecret
-# define XXH3_initCustomSecret XXH3_initCustomSecret_scalar
-#endif
-
-XXH_FORCE_INLINE void
-XXH3_hashLong_internal_loop(xxh_u64* XXH_RESTRICT acc,
- const xxh_u8* XXH_RESTRICT input, size_t len,
- const xxh_u8* XXH_RESTRICT secret, size_t secretSize,
- XXH3_f_accumulate f_acc,
- XXH3_f_scrambleAcc f_scramble)
-{
- size_t const nbStripesPerBlock = (secretSize - XXH_STRIPE_LEN) / XXH_SECRET_CONSUME_RATE;
- size_t const block_len = XXH_STRIPE_LEN * nbStripesPerBlock;
- size_t const nb_blocks = (len - 1) / block_len;
-
- size_t n;
-
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN);
-
- for (n = 0; n < nb_blocks; n++) {
- f_acc(acc, input + n*block_len, secret, nbStripesPerBlock);
- f_scramble(acc, secret + secretSize - XXH_STRIPE_LEN);
- }
-
- /* last partial block */
- XXH_ASSERT(len > XXH_STRIPE_LEN);
- { size_t const nbStripes = ((len - 1) - (block_len * nb_blocks)) / XXH_STRIPE_LEN;
- XXH_ASSERT(nbStripes <= (secretSize / XXH_SECRET_CONSUME_RATE));
- f_acc(acc, input + nb_blocks*block_len, secret, nbStripes);
-
- /* last stripe */
- { const xxh_u8* const p = input + len - XXH_STRIPE_LEN;
-#define XXH_SECRET_LASTACC_START 7 /* not aligned on 8, last secret is different from acc & scrambler */
- XXH3_accumulate_512(acc, p, secret + secretSize - XXH_STRIPE_LEN - XXH_SECRET_LASTACC_START);
- } }
-}
-
-XXH_FORCE_INLINE xxh_u64
-XXH3_mix2Accs(const xxh_u64* XXH_RESTRICT acc, const xxh_u8* XXH_RESTRICT secret)
-{
- return XXH3_mul128_fold64(
- acc[0] ^ XXH_readLE64(secret),
- acc[1] ^ XXH_readLE64(secret+8) );
-}
-
-static XXH64_hash_t
-XXH3_mergeAccs(const xxh_u64* XXH_RESTRICT acc, const xxh_u8* XXH_RESTRICT secret, xxh_u64 start)
-{
- xxh_u64 result64 = start;
- size_t i = 0;
-
- for (i = 0; i < 4; i++) {
- result64 += XXH3_mix2Accs(acc+2*i, secret + 16*i);
-#if defined(__clang__) /* Clang */ \
- && (defined(__arm__) || defined(__thumb__)) /* ARMv7 */ \
- && (defined(__ARM_NEON) || defined(__ARM_NEON__)) /* NEON */ \
- && !defined(XXH_ENABLE_AUTOVECTORIZE) /* Define to disable */
- /*
- * UGLY HACK:
- * Prevent autovectorization on Clang ARMv7-a. Exact same problem as
- * the one in XXH3_len_129to240_64b. Speeds up shorter keys > 240b.
- * XXH3_64bits, len == 256, Snapdragon 835:
- * without hack: 2063.7 MB/s
- * with hack: 2560.7 MB/s
- */
- XXH_COMPILER_GUARD(result64);
-#endif
- }
-
- return XXH3_avalanche(result64);
-}
-
-#define XXH3_INIT_ACC { XXH_PRIME32_3, XXH_PRIME64_1, XXH_PRIME64_2, XXH_PRIME64_3, \
- XXH_PRIME64_4, XXH_PRIME32_2, XXH_PRIME64_5, XXH_PRIME32_1 }
-
-XXH_FORCE_INLINE XXH64_hash_t
-XXH3_hashLong_64b_internal(const void* XXH_RESTRICT input, size_t len,
- const void* XXH_RESTRICT secret, size_t secretSize,
- XXH3_f_accumulate f_acc,
- XXH3_f_scrambleAcc f_scramble)
-{
- XXH_ALIGN(XXH_ACC_ALIGN) xxh_u64 acc[XXH_ACC_NB] = XXH3_INIT_ACC;
-
- XXH3_hashLong_internal_loop(acc, (const xxh_u8*)input, len, (const xxh_u8*)secret, secretSize, f_acc, f_scramble);
-
- /* converge into final hash */
- XXH_STATIC_ASSERT(sizeof(acc) == 64);
- /* do not align on 8, so that the secret is different from the accumulator */
-#define XXH_SECRET_MERGEACCS_START 11
- XXH_ASSERT(secretSize >= sizeof(acc) + XXH_SECRET_MERGEACCS_START);
- return XXH3_mergeAccs(acc, (const xxh_u8*)secret + XXH_SECRET_MERGEACCS_START, (xxh_u64)len * XXH_PRIME64_1);
-}
-
-/*
- * It's important for performance to transmit secret's size (when it's static)
- * so that the compiler can properly optimize the vectorized loop.
- * This makes a big performance difference for "medium" keys (<1 KB) when using AVX instruction set.
- * When the secret size is unknown, or on GCC 12 where the mix of NO_INLINE and FORCE_INLINE
- * breaks -Og, this is XXH_NO_INLINE.
- */
-XXH3_WITH_SECRET_INLINE XXH64_hash_t
-XXH3_hashLong_64b_withSecret(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed64, const xxh_u8* XXH_RESTRICT secret, size_t secretLen)
-{
- (void)seed64;
- return XXH3_hashLong_64b_internal(input, len, secret, secretLen, XXH3_accumulate, XXH3_scrambleAcc);
-}
-
-/*
- * It's preferable for performance that XXH3_hashLong is not inlined,
- * as it results in a smaller function for small data, easier to the instruction cache.
- * Note that inside this no_inline function, we do inline the internal loop,
- * and provide a statically defined secret size to allow optimization of vector loop.
- */
-XXH_NO_INLINE XXH_PUREF XXH64_hash_t
-XXH3_hashLong_64b_default(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed64, const xxh_u8* XXH_RESTRICT secret, size_t secretLen)
-{
- (void)seed64; (void)secret; (void)secretLen;
- return XXH3_hashLong_64b_internal(input, len, XXH3_kSecret, sizeof(XXH3_kSecret), XXH3_accumulate, XXH3_scrambleAcc);
-}
-
-/*
- * XXH3_hashLong_64b_withSeed():
- * Generate a custom key based on alteration of default XXH3_kSecret with the seed,
- * and then use this key for long mode hashing.
- *
- * This operation is decently fast but nonetheless costs a little bit of time.
- * Try to avoid it whenever possible (typically when seed==0).
- *
- * It's important for performance that XXH3_hashLong is not inlined. Not sure
- * why (uop cache maybe?), but the difference is large and easily measurable.
- */
-XXH_FORCE_INLINE XXH64_hash_t
-XXH3_hashLong_64b_withSeed_internal(const void* input, size_t len,
- XXH64_hash_t seed,
- XXH3_f_accumulate f_acc,
- XXH3_f_scrambleAcc f_scramble,
- XXH3_f_initCustomSecret f_initSec)
-{
-#if XXH_SIZE_OPT <= 0
- if (seed == 0)
- return XXH3_hashLong_64b_internal(input, len,
- XXH3_kSecret, sizeof(XXH3_kSecret),
- f_acc, f_scramble);
-#endif
- { XXH_ALIGN(XXH_SEC_ALIGN) xxh_u8 secret[XXH_SECRET_DEFAULT_SIZE];
- f_initSec(secret, seed);
- return XXH3_hashLong_64b_internal(input, len, secret, sizeof(secret),
- f_acc, f_scramble);
- }
-}
-
-/*
- * It's important for performance that XXH3_hashLong is not inlined.
- */
-XXH_NO_INLINE XXH64_hash_t
-XXH3_hashLong_64b_withSeed(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed, const xxh_u8* XXH_RESTRICT secret, size_t secretLen)
-{
- (void)secret; (void)secretLen;
- return XXH3_hashLong_64b_withSeed_internal(input, len, seed,
- XXH3_accumulate, XXH3_scrambleAcc, XXH3_initCustomSecret);
-}
-
-
-typedef XXH64_hash_t (*XXH3_hashLong64_f)(const void* XXH_RESTRICT, size_t,
- XXH64_hash_t, const xxh_u8* XXH_RESTRICT, size_t);
-
-XXH_FORCE_INLINE XXH64_hash_t
-XXH3_64bits_internal(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed64, const void* XXH_RESTRICT secret, size_t secretLen,
- XXH3_hashLong64_f f_hashLong)
-{
- XXH_ASSERT(secretLen >= XXH3_SECRET_SIZE_MIN);
- /*
- * If an action is to be taken if `secretLen` condition is not respected,
- * it should be done here.
- * For now, it's a contract pre-condition.
- * Adding a check and a branch here would cost performance at every hash.
- * Also, note that function signature doesn't offer room to return an error.
- */
- if (len <= 16)
- return XXH3_len_0to16_64b((const xxh_u8*)input, len, (const xxh_u8*)secret, seed64);
- if (len <= 128)
- return XXH3_len_17to128_64b((const xxh_u8*)input, len, (const xxh_u8*)secret, secretLen, seed64);
- if (len <= XXH3_MIDSIZE_MAX)
- return XXH3_len_129to240_64b((const xxh_u8*)input, len, (const xxh_u8*)secret, secretLen, seed64);
- return f_hashLong(input, len, seed64, (const xxh_u8*)secret, secretLen);
-}
-
-
-/* === Public entry point === */
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH64_hash_t XXH3_64bits(XXH_NOESCAPE const void* input, size_t length)
-{
- return XXH3_64bits_internal(input, length, 0, XXH3_kSecret, sizeof(XXH3_kSecret), XXH3_hashLong_64b_default);
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH64_hash_t
-XXH3_64bits_withSecret(XXH_NOESCAPE const void* input, size_t length, XXH_NOESCAPE const void* secret, size_t secretSize)
-{
- return XXH3_64bits_internal(input, length, 0, secret, secretSize, XXH3_hashLong_64b_withSecret);
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH64_hash_t
-XXH3_64bits_withSeed(XXH_NOESCAPE const void* input, size_t length, XXH64_hash_t seed)
-{
- return XXH3_64bits_internal(input, length, seed, XXH3_kSecret, sizeof(XXH3_kSecret), XXH3_hashLong_64b_withSeed);
-}
-
-XXH_PUBLIC_API XXH64_hash_t
-XXH3_64bits_withSecretandSeed(XXH_NOESCAPE const void* input, size_t length, XXH_NOESCAPE const void* secret, size_t secretSize, XXH64_hash_t seed)
-{
- if (length <= XXH3_MIDSIZE_MAX)
- return XXH3_64bits_internal(input, length, seed, XXH3_kSecret, sizeof(XXH3_kSecret), NULL);
- return XXH3_hashLong_64b_withSecret(input, length, seed, (const xxh_u8*)secret, secretSize);
-}
-
-
-/* === XXH3 streaming === */
-#ifndef XXH_NO_STREAM
-/*
- * Malloc's a pointer that is always aligned to align.
- *
- * This must be freed with `XXH_alignedFree()`.
- *
- * malloc typically guarantees 16 byte alignment on 64-bit systems and 8 byte
- * alignment on 32-bit. This isn't enough for the 32 byte aligned loads in AVX2
- * or on 32-bit, the 16 byte aligned loads in SSE2 and NEON.
- *
- * This underalignment previously caused a rather obvious crash which went
- * completely unnoticed due to XXH3_createState() not actually being tested.
- * Credit to RedSpah for noticing this bug.
- *
- * The alignment is done manually: Functions like posix_memalign or _mm_malloc
- * are avoided: To maintain portability, we would have to write a fallback
- * like this anyways, and besides, testing for the existence of library
- * functions without relying on external build tools is impossible.
- *
- * The method is simple: Overallocate, manually align, and store the offset
- * to the original behind the returned pointer.
- *
- * Align must be a power of 2 and 8 <= align <= 128.
- */
-static XXH_MALLOCF void* XXH_alignedMalloc(size_t s, size_t align)
-{
- XXH_ASSERT(align <= 128 && align >= 8); /* range check */
- XXH_ASSERT((align & (align-1)) == 0); /* power of 2 */
- XXH_ASSERT(s != 0 && s < (s + align)); /* empty/overflow */
- { /* Overallocate to make room for manual realignment and an offset byte */
- xxh_u8* base = (xxh_u8*)XXH_malloc(s + align);
- if (base != NULL) {
- /*
- * Get the offset needed to align this pointer.
- *
- * Even if the returned pointer is aligned, there will always be
- * at least one byte to store the offset to the original pointer.
- */
- size_t offset = align - ((size_t)base & (align - 1)); /* base % align */
- /* Add the offset for the now-aligned pointer */
- xxh_u8* ptr = base + offset;
-
- XXH_ASSERT((size_t)ptr % align == 0);
-
- /* Store the offset immediately before the returned pointer. */
- ptr[-1] = (xxh_u8)offset;
- return ptr;
- }
- return NULL;
- }
-}
-/*
- * Frees an aligned pointer allocated by XXH_alignedMalloc(). Don't pass
- * normal malloc'd pointers, XXH_alignedMalloc has a specific data layout.
- */
-static void XXH_alignedFree(void* p)
-{
- if (p != NULL) {
- xxh_u8* ptr = (xxh_u8*)p;
- /* Get the offset byte we added in XXH_malloc. */
- xxh_u8 offset = ptr[-1];
- /* Free the original malloc'd pointer */
- xxh_u8* base = ptr - offset;
- XXH_free(base);
- }
-}
-/*! @ingroup XXH3_family */
-/*!
- * @brief Allocate an @ref XXH3_state_t.
- *
- * Must be freed with XXH3_freeState().
- * @return An allocated XXH3_state_t on success, `NULL` on failure.
- */
-XXH_PUBLIC_API XXH3_state_t* XXH3_createState(void)
-{
- XXH3_state_t* const state = (XXH3_state_t*)XXH_alignedMalloc(sizeof(XXH3_state_t), 64);
- if (state==NULL) return NULL;
- XXH3_INITSTATE(state);
- return state;
-}
-
-/*! @ingroup XXH3_family */
-/*!
- * @brief Frees an @ref XXH3_state_t.
- *
- * Must be allocated with XXH3_createState().
- * @param statePtr A pointer to an @ref XXH3_state_t allocated with @ref XXH3_createState().
- * @return XXH_OK.
- */
-XXH_PUBLIC_API XXH_errorcode XXH3_freeState(XXH3_state_t* statePtr)
-{
- XXH_alignedFree(statePtr);
- return XXH_OK;
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API void
-XXH3_copyState(XXH_NOESCAPE XXH3_state_t* dst_state, XXH_NOESCAPE const XXH3_state_t* src_state)
-{
- XXH_memcpy(dst_state, src_state, sizeof(*dst_state));
-}
-
-static void
-XXH3_reset_internal(XXH3_state_t* statePtr,
- XXH64_hash_t seed,
- const void* secret, size_t secretSize)
-{
- size_t const initStart = offsetof(XXH3_state_t, bufferedSize);
- size_t const initLength = offsetof(XXH3_state_t, nbStripesPerBlock) - initStart;
- XXH_ASSERT(offsetof(XXH3_state_t, nbStripesPerBlock) > initStart);
- XXH_ASSERT(statePtr != NULL);
- /* set members from bufferedSize to nbStripesPerBlock (excluded) to 0 */
- memset((char*)statePtr + initStart, 0, initLength);
- statePtr->acc[0] = XXH_PRIME32_3;
- statePtr->acc[1] = XXH_PRIME64_1;
- statePtr->acc[2] = XXH_PRIME64_2;
- statePtr->acc[3] = XXH_PRIME64_3;
- statePtr->acc[4] = XXH_PRIME64_4;
- statePtr->acc[5] = XXH_PRIME32_2;
- statePtr->acc[6] = XXH_PRIME64_5;
- statePtr->acc[7] = XXH_PRIME32_1;
- statePtr->seed = seed;
- statePtr->useSeed = (seed != 0);
- statePtr->extSecret = (const unsigned char*)secret;
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN);
- statePtr->secretLimit = secretSize - XXH_STRIPE_LEN;
- statePtr->nbStripesPerBlock = statePtr->secretLimit / XXH_SECRET_CONSUME_RATE;
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_64bits_reset(XXH_NOESCAPE XXH3_state_t* statePtr)
-{
- if (statePtr == NULL) return XXH_ERROR;
- XXH3_reset_internal(statePtr, 0, XXH3_kSecret, XXH_SECRET_DEFAULT_SIZE);
- return XXH_OK;
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_64bits_reset_withSecret(XXH_NOESCAPE XXH3_state_t* statePtr, XXH_NOESCAPE const void* secret, size_t secretSize)
-{
- if (statePtr == NULL) return XXH_ERROR;
- XXH3_reset_internal(statePtr, 0, secret, secretSize);
- if (secret == NULL) return XXH_ERROR;
- if (secretSize < XXH3_SECRET_SIZE_MIN) return XXH_ERROR;
- return XXH_OK;
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_64bits_reset_withSeed(XXH_NOESCAPE XXH3_state_t* statePtr, XXH64_hash_t seed)
-{
- if (statePtr == NULL) return XXH_ERROR;
- if (seed==0) return XXH3_64bits_reset(statePtr);
- if ((seed != statePtr->seed) || (statePtr->extSecret != NULL))
- XXH3_initCustomSecret(statePtr->customSecret, seed);
- XXH3_reset_internal(statePtr, seed, NULL, XXH_SECRET_DEFAULT_SIZE);
- return XXH_OK;
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_64bits_reset_withSecretandSeed(XXH_NOESCAPE XXH3_state_t* statePtr, XXH_NOESCAPE const void* secret, size_t secretSize, XXH64_hash_t seed64)
-{
- if (statePtr == NULL) return XXH_ERROR;
- if (secret == NULL) return XXH_ERROR;
- if (secretSize < XXH3_SECRET_SIZE_MIN) return XXH_ERROR;
- XXH3_reset_internal(statePtr, seed64, secret, secretSize);
- statePtr->useSeed = 1; /* always, even if seed64==0 */
- return XXH_OK;
-}
-
-/*!
- * @internal
- * @brief Processes a large input for XXH3_update() and XXH3_digest_long().
- *
- * Unlike XXH3_hashLong_internal_loop(), this can process data that overlaps a block.
- *
- * @param acc Pointer to the 8 accumulator lanes
- * @param nbStripesSoFarPtr In/out pointer to the number of leftover stripes in the block*
- * @param nbStripesPerBlock Number of stripes in a block
- * @param input Input pointer
- * @param nbStripes Number of stripes to process
- * @param secret Secret pointer
- * @param secretLimit Offset of the last block in @p secret
- * @param f_acc Pointer to an XXH3_accumulate implementation
- * @param f_scramble Pointer to an XXH3_scrambleAcc implementation
- * @return Pointer past the end of @p input after processing
- */
-XXH_FORCE_INLINE const xxh_u8 *
-XXH3_consumeStripes(xxh_u64* XXH_RESTRICT acc,
- size_t* XXH_RESTRICT nbStripesSoFarPtr, size_t nbStripesPerBlock,
- const xxh_u8* XXH_RESTRICT input, size_t nbStripes,
- const xxh_u8* XXH_RESTRICT secret, size_t secretLimit,
- XXH3_f_accumulate f_acc,
- XXH3_f_scrambleAcc f_scramble)
-{
- const xxh_u8* initialSecret = secret + *nbStripesSoFarPtr * XXH_SECRET_CONSUME_RATE;
- /* Process full blocks */
- if (nbStripes >= (nbStripesPerBlock - *nbStripesSoFarPtr)) {
- /* Process the initial partial block... */
- size_t nbStripesThisIter = nbStripesPerBlock - *nbStripesSoFarPtr;
-
- do {
- /* Accumulate and scramble */
- f_acc(acc, input, initialSecret, nbStripesThisIter);
- f_scramble(acc, secret + secretLimit);
- input += nbStripesThisIter * XXH_STRIPE_LEN;
- nbStripes -= nbStripesThisIter;
- /* Then continue the loop with the full block size */
- nbStripesThisIter = nbStripesPerBlock;
- initialSecret = secret;
- } while (nbStripes >= nbStripesPerBlock);
- *nbStripesSoFarPtr = 0;
- }
- /* Process a partial block */
- if (nbStripes > 0) {
- f_acc(acc, input, initialSecret, nbStripes);
- input += nbStripes * XXH_STRIPE_LEN;
- *nbStripesSoFarPtr += nbStripes;
- }
- /* Return end pointer */
- return input;
-}
-
-#ifndef XXH3_STREAM_USE_STACK
-# if XXH_SIZE_OPT <= 0 && !defined(__clang__) /* clang doesn't need additional stack space */
-# define XXH3_STREAM_USE_STACK 1
-# endif
-#endif
-/*
- * Both XXH3_64bits_update and XXH3_128bits_update use this routine.
- */
-XXH_FORCE_INLINE XXH_errorcode
-XXH3_update(XXH3_state_t* XXH_RESTRICT const state,
- const xxh_u8* XXH_RESTRICT input, size_t len,
- XXH3_f_accumulate f_acc,
- XXH3_f_scrambleAcc f_scramble)
-{
- if (input==NULL) {
- XXH_ASSERT(len == 0);
- return XXH_OK;
- }
-
- XXH_ASSERT(state != NULL);
- { const xxh_u8* const bEnd = input + len;
- const unsigned char* const secret = (state->extSecret == NULL) ? state->customSecret : state->extSecret;
-#if defined(XXH3_STREAM_USE_STACK) && XXH3_STREAM_USE_STACK >= 1
- /* For some reason, gcc and MSVC seem to suffer greatly
- * when operating accumulators directly into state.
- * Operating into stack space seems to enable proper optimization.
- * clang, on the other hand, doesn't seem to need this trick */
- XXH_ALIGN(XXH_ACC_ALIGN) xxh_u64 acc[8];
- XXH_memcpy(acc, state->acc, sizeof(acc));
-#else
- xxh_u64* XXH_RESTRICT const acc = state->acc;
-#endif
- state->totalLen += len;
- XXH_ASSERT(state->bufferedSize <= XXH3_INTERNALBUFFER_SIZE);
-
- /* small input : just fill in tmp buffer */
- if (len <= XXH3_INTERNALBUFFER_SIZE - state->bufferedSize) {
- XXH_memcpy(state->buffer + state->bufferedSize, input, len);
- state->bufferedSize += (XXH32_hash_t)len;
- return XXH_OK;
- }
-
- /* total input is now > XXH3_INTERNALBUFFER_SIZE */
- #define XXH3_INTERNALBUFFER_STRIPES (XXH3_INTERNALBUFFER_SIZE / XXH_STRIPE_LEN)
- XXH_STATIC_ASSERT(XXH3_INTERNALBUFFER_SIZE % XXH_STRIPE_LEN == 0); /* clean multiple */
-
- /*
- * Internal buffer is partially filled (always, except at beginning)
- * Complete it, then consume it.
- */
- if (state->bufferedSize) {
- size_t const loadSize = XXH3_INTERNALBUFFER_SIZE - state->bufferedSize;
- XXH_memcpy(state->buffer + state->bufferedSize, input, loadSize);
- input += loadSize;
- XXH3_consumeStripes(acc,
- &state->nbStripesSoFar, state->nbStripesPerBlock,
- state->buffer, XXH3_INTERNALBUFFER_STRIPES,
- secret, state->secretLimit,
- f_acc, f_scramble);
- state->bufferedSize = 0;
- }
- XXH_ASSERT(input < bEnd);
- if (bEnd - input > XXH3_INTERNALBUFFER_SIZE) {
- size_t nbStripes = (size_t)(bEnd - 1 - input) / XXH_STRIPE_LEN;
- input = XXH3_consumeStripes(acc,
- &state->nbStripesSoFar, state->nbStripesPerBlock,
- input, nbStripes,
- secret, state->secretLimit,
- f_acc, f_scramble);
- XXH_memcpy(state->buffer + sizeof(state->buffer) - XXH_STRIPE_LEN, input - XXH_STRIPE_LEN, XXH_STRIPE_LEN);
-
- }
- /* Some remaining input (always) : buffer it */
- XXH_ASSERT(input < bEnd);
- XXH_ASSERT(bEnd - input <= XXH3_INTERNALBUFFER_SIZE);
- XXH_ASSERT(state->bufferedSize == 0);
- XXH_memcpy(state->buffer, input, (size_t)(bEnd-input));
- state->bufferedSize = (XXH32_hash_t)(bEnd-input);
-#if defined(XXH3_STREAM_USE_STACK) && XXH3_STREAM_USE_STACK >= 1
- /* save stack accumulators into state */
- XXH_memcpy(state->acc, acc, sizeof(acc));
-#endif
- }
-
- return XXH_OK;
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_64bits_update(XXH_NOESCAPE XXH3_state_t* state, XXH_NOESCAPE const void* input, size_t len)
-{
- return XXH3_update(state, (const xxh_u8*)input, len,
- XXH3_accumulate, XXH3_scrambleAcc);
-}
-
-
-XXH_FORCE_INLINE void
-XXH3_digest_long (XXH64_hash_t* acc,
- const XXH3_state_t* state,
- const unsigned char* secret)
-{
- xxh_u8 lastStripe[XXH_STRIPE_LEN];
- const xxh_u8* lastStripePtr;
-
- /*
- * Digest on a local copy. This way, the state remains unaltered, and it can
- * continue ingesting more input afterwards.
- */
- XXH_memcpy(acc, state->acc, sizeof(state->acc));
- if (state->bufferedSize >= XXH_STRIPE_LEN) {
- /* Consume remaining stripes then point to remaining data in buffer */
- size_t const nbStripes = (state->bufferedSize - 1) / XXH_STRIPE_LEN;
- size_t nbStripesSoFar = state->nbStripesSoFar;
- XXH3_consumeStripes(acc,
- &nbStripesSoFar, state->nbStripesPerBlock,
- state->buffer, nbStripes,
- secret, state->secretLimit,
- XXH3_accumulate, XXH3_scrambleAcc);
- lastStripePtr = state->buffer + state->bufferedSize - XXH_STRIPE_LEN;
- } else { /* bufferedSize < XXH_STRIPE_LEN */
- /* Copy to temp buffer */
- size_t const catchupSize = XXH_STRIPE_LEN - state->bufferedSize;
- XXH_ASSERT(state->bufferedSize > 0); /* there is always some input buffered */
- XXH_memcpy(lastStripe, state->buffer + sizeof(state->buffer) - catchupSize, catchupSize);
- XXH_memcpy(lastStripe + catchupSize, state->buffer, state->bufferedSize);
- lastStripePtr = lastStripe;
- }
- /* Last stripe */
- XXH3_accumulate_512(acc,
- lastStripePtr,
- secret + state->secretLimit - XXH_SECRET_LASTACC_START);
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH64_hash_t XXH3_64bits_digest (XXH_NOESCAPE const XXH3_state_t* state)
-{
- const unsigned char* const secret = (state->extSecret == NULL) ? state->customSecret : state->extSecret;
- if (state->totalLen > XXH3_MIDSIZE_MAX) {
- XXH_ALIGN(XXH_ACC_ALIGN) XXH64_hash_t acc[XXH_ACC_NB];
- XXH3_digest_long(acc, state, secret);
- return XXH3_mergeAccs(acc,
- secret + XXH_SECRET_MERGEACCS_START,
- (xxh_u64)state->totalLen * XXH_PRIME64_1);
- }
- /* totalLen <= XXH3_MIDSIZE_MAX: digesting a short input */
- if (state->useSeed)
- return XXH3_64bits_withSeed(state->buffer, (size_t)state->totalLen, state->seed);
- return XXH3_64bits_withSecret(state->buffer, (size_t)(state->totalLen),
- secret, state->secretLimit + XXH_STRIPE_LEN);
-}
-#endif /* !XXH_NO_STREAM */
-
-
-/* ==========================================
- * XXH3 128 bits (a.k.a XXH128)
- * ==========================================
- * XXH3's 128-bit variant has better mixing and strength than the 64-bit variant,
- * even without counting the significantly larger output size.
- *
- * For example, extra steps are taken to avoid the seed-dependent collisions
- * in 17-240 byte inputs (See XXH3_mix16B and XXH128_mix32B).
- *
- * This strength naturally comes at the cost of some speed, especially on short
- * lengths. Note that longer hashes are about as fast as the 64-bit version
- * due to it using only a slight modification of the 64-bit loop.
- *
- * XXH128 is also more oriented towards 64-bit machines. It is still extremely
- * fast for a _128-bit_ hash on 32-bit (it usually clears XXH64).
- */
-
-XXH_FORCE_INLINE XXH_PUREF XXH128_hash_t
-XXH3_len_1to3_128b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- /* A doubled version of 1to3_64b with different constants. */
- XXH_ASSERT(input != NULL);
- XXH_ASSERT(1 <= len && len <= 3);
- XXH_ASSERT(secret != NULL);
- /*
- * len = 1: combinedl = { input[0], 0x01, input[0], input[0] }
- * len = 2: combinedl = { input[1], 0x02, input[0], input[1] }
- * len = 3: combinedl = { input[2], 0x03, input[0], input[1] }
- */
- { xxh_u8 const c1 = input[0];
- xxh_u8 const c2 = input[len >> 1];
- xxh_u8 const c3 = input[len - 1];
- xxh_u32 const combinedl = ((xxh_u32)c1 <<16) | ((xxh_u32)c2 << 24)
- | ((xxh_u32)c3 << 0) | ((xxh_u32)len << 8);
- xxh_u32 const combinedh = XXH_rotl32(XXH_swap32(combinedl), 13);
- xxh_u64 const bitflipl = (XXH_readLE32(secret) ^ XXH_readLE32(secret+4)) + seed;
- xxh_u64 const bitfliph = (XXH_readLE32(secret+8) ^ XXH_readLE32(secret+12)) - seed;
- xxh_u64 const keyed_lo = (xxh_u64)combinedl ^ bitflipl;
- xxh_u64 const keyed_hi = (xxh_u64)combinedh ^ bitfliph;
- XXH128_hash_t h128;
- h128.low64 = XXH64_avalanche(keyed_lo);
- h128.high64 = XXH64_avalanche(keyed_hi);
- return h128;
- }
-}
-
-XXH_FORCE_INLINE XXH_PUREF XXH128_hash_t
-XXH3_len_4to8_128b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(input != NULL);
- XXH_ASSERT(secret != NULL);
- XXH_ASSERT(4 <= len && len <= 8);
- seed ^= (xxh_u64)XXH_swap32((xxh_u32)seed) << 32;
- { xxh_u32 const input_lo = XXH_readLE32(input);
- xxh_u32 const input_hi = XXH_readLE32(input + len - 4);
- xxh_u64 const input_64 = input_lo + ((xxh_u64)input_hi << 32);
- xxh_u64 const bitflip = (XXH_readLE64(secret+16) ^ XXH_readLE64(secret+24)) + seed;
- xxh_u64 const keyed = input_64 ^ bitflip;
-
- /* Shift len to the left to ensure it is even, this avoids even multiplies. */
- XXH128_hash_t m128 = XXH_mult64to128(keyed, XXH_PRIME64_1 + (len << 2));
-
- m128.high64 += (m128.low64 << 1);
- m128.low64 ^= (m128.high64 >> 3);
-
- m128.low64 = XXH_xorshift64(m128.low64, 35);
- m128.low64 *= PRIME_MX2;
- m128.low64 = XXH_xorshift64(m128.low64, 28);
- m128.high64 = XXH3_avalanche(m128.high64);
- return m128;
- }
-}
-
-XXH_FORCE_INLINE XXH_PUREF XXH128_hash_t
-XXH3_len_9to16_128b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(input != NULL);
- XXH_ASSERT(secret != NULL);
- XXH_ASSERT(9 <= len && len <= 16);
- { xxh_u64 const bitflipl = (XXH_readLE64(secret+32) ^ XXH_readLE64(secret+40)) - seed;
- xxh_u64 const bitfliph = (XXH_readLE64(secret+48) ^ XXH_readLE64(secret+56)) + seed;
- xxh_u64 const input_lo = XXH_readLE64(input);
- xxh_u64 input_hi = XXH_readLE64(input + len - 8);
- XXH128_hash_t m128 = XXH_mult64to128(input_lo ^ input_hi ^ bitflipl, XXH_PRIME64_1);
- /*
- * Put len in the middle of m128 to ensure that the length gets mixed to
- * both the low and high bits in the 128x64 multiply below.
- */
- m128.low64 += (xxh_u64)(len - 1) << 54;
- input_hi ^= bitfliph;
- /*
- * Add the high 32 bits of input_hi to the high 32 bits of m128, then
- * add the long product of the low 32 bits of input_hi and XXH_PRIME32_2 to
- * the high 64 bits of m128.
- *
- * The best approach to this operation is different on 32-bit and 64-bit.
- */
- if (sizeof(void *) < sizeof(xxh_u64)) { /* 32-bit */
- /*
- * 32-bit optimized version, which is more readable.
- *
- * On 32-bit, it removes an ADC and delays a dependency between the two
- * halves of m128.high64, but it generates an extra mask on 64-bit.
- */
- m128.high64 += (input_hi & 0xFFFFFFFF00000000ULL) + XXH_mult32to64((xxh_u32)input_hi, XXH_PRIME32_2);
- } else {
- /*
- * 64-bit optimized (albeit more confusing) version.
- *
- * Uses some properties of addition and multiplication to remove the mask:
- *
- * Let:
- * a = input_hi.lo = (input_hi & 0x00000000FFFFFFFF)
- * b = input_hi.hi = (input_hi & 0xFFFFFFFF00000000)
- * c = XXH_PRIME32_2
- *
- * a + (b * c)
- * Inverse Property: x + y - x == y
- * a + (b * (1 + c - 1))
- * Distributive Property: x * (y + z) == (x * y) + (x * z)
- * a + (b * 1) + (b * (c - 1))
- * Identity Property: x * 1 == x
- * a + b + (b * (c - 1))
- *
- * Substitute a, b, and c:
- * input_hi.hi + input_hi.lo + ((xxh_u64)input_hi.lo * (XXH_PRIME32_2 - 1))
- *
- * Since input_hi.hi + input_hi.lo == input_hi, we get this:
- * input_hi + ((xxh_u64)input_hi.lo * (XXH_PRIME32_2 - 1))
- */
- m128.high64 += input_hi + XXH_mult32to64((xxh_u32)input_hi, XXH_PRIME32_2 - 1);
- }
- /* m128 ^= XXH_swap64(m128 >> 64); */
- m128.low64 ^= XXH_swap64(m128.high64);
-
- { /* 128x64 multiply: h128 = m128 * XXH_PRIME64_2; */
- XXH128_hash_t h128 = XXH_mult64to128(m128.low64, XXH_PRIME64_2);
- h128.high64 += m128.high64 * XXH_PRIME64_2;
-
- h128.low64 = XXH3_avalanche(h128.low64);
- h128.high64 = XXH3_avalanche(h128.high64);
- return h128;
- } }
-}
-
-/*
- * Assumption: `secret` size is >= XXH3_SECRET_SIZE_MIN
- */
-XXH_FORCE_INLINE XXH_PUREF XXH128_hash_t
-XXH3_len_0to16_128b(const xxh_u8* input, size_t len, const xxh_u8* secret, XXH64_hash_t seed)
-{
- XXH_ASSERT(len <= 16);
- { if (len > 8) return XXH3_len_9to16_128b(input, len, secret, seed);
- if (len >= 4) return XXH3_len_4to8_128b(input, len, secret, seed);
- if (len) return XXH3_len_1to3_128b(input, len, secret, seed);
- { XXH128_hash_t h128;
- xxh_u64 const bitflipl = XXH_readLE64(secret+64) ^ XXH_readLE64(secret+72);
- xxh_u64 const bitfliph = XXH_readLE64(secret+80) ^ XXH_readLE64(secret+88);
- h128.low64 = XXH64_avalanche(seed ^ bitflipl);
- h128.high64 = XXH64_avalanche( seed ^ bitfliph);
- return h128;
- } }
-}
-
-/*
- * A bit slower than XXH3_mix16B, but handles multiply by zero better.
- */
-XXH_FORCE_INLINE XXH128_hash_t
-XXH128_mix32B(XXH128_hash_t acc, const xxh_u8* input_1, const xxh_u8* input_2,
- const xxh_u8* secret, XXH64_hash_t seed)
-{
- acc.low64 += XXH3_mix16B (input_1, secret+0, seed);
- acc.low64 ^= XXH_readLE64(input_2) + XXH_readLE64(input_2 + 8);
- acc.high64 += XXH3_mix16B (input_2, secret+16, seed);
- acc.high64 ^= XXH_readLE64(input_1) + XXH_readLE64(input_1 + 8);
- return acc;
-}
-
-
-XXH_FORCE_INLINE XXH_PUREF XXH128_hash_t
-XXH3_len_17to128_128b(const xxh_u8* XXH_RESTRICT input, size_t len,
- const xxh_u8* XXH_RESTRICT secret, size_t secretSize,
- XXH64_hash_t seed)
-{
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN); (void)secretSize;
- XXH_ASSERT(16 < len && len <= 128);
-
- { XXH128_hash_t acc;
- acc.low64 = len * XXH_PRIME64_1;
- acc.high64 = 0;
-
-#if XXH_SIZE_OPT >= 1
- {
- /* Smaller, but slightly slower. */
- unsigned int i = (unsigned int)(len - 1) / 32;
- do {
- acc = XXH128_mix32B(acc, input+16*i, input+len-16*(i+1), secret+32*i, seed);
- } while (i-- != 0);
- }
-#else
- if (len > 32) {
- if (len > 64) {
- if (len > 96) {
- acc = XXH128_mix32B(acc, input+48, input+len-64, secret+96, seed);
- }
- acc = XXH128_mix32B(acc, input+32, input+len-48, secret+64, seed);
- }
- acc = XXH128_mix32B(acc, input+16, input+len-32, secret+32, seed);
- }
- acc = XXH128_mix32B(acc, input, input+len-16, secret, seed);
-#endif
- { XXH128_hash_t h128;
- h128.low64 = acc.low64 + acc.high64;
- h128.high64 = (acc.low64 * XXH_PRIME64_1)
- + (acc.high64 * XXH_PRIME64_4)
- + ((len - seed) * XXH_PRIME64_2);
- h128.low64 = XXH3_avalanche(h128.low64);
- h128.high64 = (XXH64_hash_t)0 - XXH3_avalanche(h128.high64);
- return h128;
- }
- }
-}
-
-XXH_NO_INLINE XXH_PUREF XXH128_hash_t
-XXH3_len_129to240_128b(const xxh_u8* XXH_RESTRICT input, size_t len,
- const xxh_u8* XXH_RESTRICT secret, size_t secretSize,
- XXH64_hash_t seed)
-{
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN); (void)secretSize;
- XXH_ASSERT(128 < len && len <= XXH3_MIDSIZE_MAX);
-
- { XXH128_hash_t acc;
- unsigned i;
- acc.low64 = len * XXH_PRIME64_1;
- acc.high64 = 0;
- /*
- * We set as `i` as offset + 32. We do this so that unchanged
- * `len` can be used as upper bound. This reaches a sweet spot
- * where both x86 and aarch64 get simple agen and good codegen
- * for the loop.
- */
- for (i = 32; i < 160; i += 32) {
- acc = XXH128_mix32B(acc,
- input + i - 32,
- input + i - 16,
- secret + i - 32,
- seed);
- }
- acc.low64 = XXH3_avalanche(acc.low64);
- acc.high64 = XXH3_avalanche(acc.high64);
- /*
- * NB: `i <= len` will duplicate the last 32-bytes if
- * len % 32 was zero. This is an unfortunate necessity to keep
- * the hash result stable.
- */
- for (i=160; i <= len; i += 32) {
- acc = XXH128_mix32B(acc,
- input + i - 32,
- input + i - 16,
- secret + XXH3_MIDSIZE_STARTOFFSET + i - 160,
- seed);
- }
- /* last bytes */
- acc = XXH128_mix32B(acc,
- input + len - 16,
- input + len - 32,
- secret + XXH3_SECRET_SIZE_MIN - XXH3_MIDSIZE_LASTOFFSET - 16,
- (XXH64_hash_t)0 - seed);
-
- { XXH128_hash_t h128;
- h128.low64 = acc.low64 + acc.high64;
- h128.high64 = (acc.low64 * XXH_PRIME64_1)
- + (acc.high64 * XXH_PRIME64_4)
- + ((len - seed) * XXH_PRIME64_2);
- h128.low64 = XXH3_avalanche(h128.low64);
- h128.high64 = (XXH64_hash_t)0 - XXH3_avalanche(h128.high64);
- return h128;
- }
- }
-}
-
-XXH_FORCE_INLINE XXH128_hash_t
-XXH3_hashLong_128b_internal(const void* XXH_RESTRICT input, size_t len,
- const xxh_u8* XXH_RESTRICT secret, size_t secretSize,
- XXH3_f_accumulate f_acc,
- XXH3_f_scrambleAcc f_scramble)
-{
- XXH_ALIGN(XXH_ACC_ALIGN) xxh_u64 acc[XXH_ACC_NB] = XXH3_INIT_ACC;
-
- XXH3_hashLong_internal_loop(acc, (const xxh_u8*)input, len, secret, secretSize, f_acc, f_scramble);
-
- /* converge into final hash */
- XXH_STATIC_ASSERT(sizeof(acc) == 64);
- XXH_ASSERT(secretSize >= sizeof(acc) + XXH_SECRET_MERGEACCS_START);
- { XXH128_hash_t h128;
- h128.low64 = XXH3_mergeAccs(acc,
- secret + XXH_SECRET_MERGEACCS_START,
- (xxh_u64)len * XXH_PRIME64_1);
- h128.high64 = XXH3_mergeAccs(acc,
- secret + secretSize
- - sizeof(acc) - XXH_SECRET_MERGEACCS_START,
- ~((xxh_u64)len * XXH_PRIME64_2));
- return h128;
- }
-}
-
-/*
- * It's important for performance that XXH3_hashLong() is not inlined.
- */
-XXH_NO_INLINE XXH_PUREF XXH128_hash_t
-XXH3_hashLong_128b_default(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed64,
- const void* XXH_RESTRICT secret, size_t secretLen)
-{
- (void)seed64; (void)secret; (void)secretLen;
- return XXH3_hashLong_128b_internal(input, len, XXH3_kSecret, sizeof(XXH3_kSecret),
- XXH3_accumulate, XXH3_scrambleAcc);
-}
-
-/*
- * It's important for performance to pass @p secretLen (when it's static)
- * to the compiler, so that it can properly optimize the vectorized loop.
- *
- * When the secret size is unknown, or on GCC 12 where the mix of NO_INLINE and FORCE_INLINE
- * breaks -Og, this is XXH_NO_INLINE.
- */
-XXH3_WITH_SECRET_INLINE XXH128_hash_t
-XXH3_hashLong_128b_withSecret(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed64,
- const void* XXH_RESTRICT secret, size_t secretLen)
-{
- (void)seed64;
- return XXH3_hashLong_128b_internal(input, len, (const xxh_u8*)secret, secretLen,
- XXH3_accumulate, XXH3_scrambleAcc);
-}
-
-XXH_FORCE_INLINE XXH128_hash_t
-XXH3_hashLong_128b_withSeed_internal(const void* XXH_RESTRICT input, size_t len,
- XXH64_hash_t seed64,
- XXH3_f_accumulate f_acc,
- XXH3_f_scrambleAcc f_scramble,
- XXH3_f_initCustomSecret f_initSec)
-{
- if (seed64 == 0)
- return XXH3_hashLong_128b_internal(input, len,
- XXH3_kSecret, sizeof(XXH3_kSecret),
- f_acc, f_scramble);
- { XXH_ALIGN(XXH_SEC_ALIGN) xxh_u8 secret[XXH_SECRET_DEFAULT_SIZE];
- f_initSec(secret, seed64);
- return XXH3_hashLong_128b_internal(input, len, (const xxh_u8*)secret, sizeof(secret),
- f_acc, f_scramble);
- }
-}
-
-/*
- * It's important for performance that XXH3_hashLong is not inlined.
- */
-XXH_NO_INLINE XXH128_hash_t
-XXH3_hashLong_128b_withSeed(const void* input, size_t len,
- XXH64_hash_t seed64, const void* XXH_RESTRICT secret, size_t secretLen)
-{
- (void)secret; (void)secretLen;
- return XXH3_hashLong_128b_withSeed_internal(input, len, seed64,
- XXH3_accumulate, XXH3_scrambleAcc, XXH3_initCustomSecret);
-}
-
-typedef XXH128_hash_t (*XXH3_hashLong128_f)(const void* XXH_RESTRICT, size_t,
- XXH64_hash_t, const void* XXH_RESTRICT, size_t);
-
-XXH_FORCE_INLINE XXH128_hash_t
-XXH3_128bits_internal(const void* input, size_t len,
- XXH64_hash_t seed64, const void* XXH_RESTRICT secret, size_t secretLen,
- XXH3_hashLong128_f f_hl128)
-{
- XXH_ASSERT(secretLen >= XXH3_SECRET_SIZE_MIN);
- /*
- * If an action is to be taken if `secret` conditions are not respected,
- * it should be done here.
- * For now, it's a contract pre-condition.
- * Adding a check and a branch here would cost performance at every hash.
- */
- if (len <= 16)
- return XXH3_len_0to16_128b((const xxh_u8*)input, len, (const xxh_u8*)secret, seed64);
- if (len <= 128)
- return XXH3_len_17to128_128b((const xxh_u8*)input, len, (const xxh_u8*)secret, secretLen, seed64);
- if (len <= XXH3_MIDSIZE_MAX)
- return XXH3_len_129to240_128b((const xxh_u8*)input, len, (const xxh_u8*)secret, secretLen, seed64);
- return f_hl128(input, len, seed64, secret, secretLen);
-}
-
-
-/* === Public XXH128 API === */
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH128_hash_t XXH3_128bits(XXH_NOESCAPE const void* input, size_t len)
-{
- return XXH3_128bits_internal(input, len, 0,
- XXH3_kSecret, sizeof(XXH3_kSecret),
- XXH3_hashLong_128b_default);
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH128_hash_t
-XXH3_128bits_withSecret(XXH_NOESCAPE const void* input, size_t len, XXH_NOESCAPE const void* secret, size_t secretSize)
-{
- return XXH3_128bits_internal(input, len, 0,
- (const xxh_u8*)secret, secretSize,
- XXH3_hashLong_128b_withSecret);
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH128_hash_t
-XXH3_128bits_withSeed(XXH_NOESCAPE const void* input, size_t len, XXH64_hash_t seed)
-{
- return XXH3_128bits_internal(input, len, seed,
- XXH3_kSecret, sizeof(XXH3_kSecret),
- XXH3_hashLong_128b_withSeed);
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH128_hash_t
-XXH3_128bits_withSecretandSeed(XXH_NOESCAPE const void* input, size_t len, XXH_NOESCAPE const void* secret, size_t secretSize, XXH64_hash_t seed)
-{
- if (len <= XXH3_MIDSIZE_MAX)
- return XXH3_128bits_internal(input, len, seed, XXH3_kSecret, sizeof(XXH3_kSecret), NULL);
- return XXH3_hashLong_128b_withSecret(input, len, seed, secret, secretSize);
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH128_hash_t
-XXH128(XXH_NOESCAPE const void* input, size_t len, XXH64_hash_t seed)
-{
- return XXH3_128bits_withSeed(input, len, seed);
-}
-
-
-/* === XXH3 128-bit streaming === */
-#ifndef XXH_NO_STREAM
-/*
- * All initialization and update functions are identical to 64-bit streaming variant.
- * The only difference is the finalization routine.
- */
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_128bits_reset(XXH_NOESCAPE XXH3_state_t* statePtr)
-{
- return XXH3_64bits_reset(statePtr);
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_128bits_reset_withSecret(XXH_NOESCAPE XXH3_state_t* statePtr, XXH_NOESCAPE const void* secret, size_t secretSize)
-{
- return XXH3_64bits_reset_withSecret(statePtr, secret, secretSize);
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_128bits_reset_withSeed(XXH_NOESCAPE XXH3_state_t* statePtr, XXH64_hash_t seed)
-{
- return XXH3_64bits_reset_withSeed(statePtr, seed);
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_128bits_reset_withSecretandSeed(XXH_NOESCAPE XXH3_state_t* statePtr, XXH_NOESCAPE const void* secret, size_t secretSize, XXH64_hash_t seed)
-{
- return XXH3_64bits_reset_withSecretandSeed(statePtr, secret, secretSize, seed);
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_128bits_update(XXH_NOESCAPE XXH3_state_t* state, XXH_NOESCAPE const void* input, size_t len)
-{
- return XXH3_64bits_update(state, input, len);
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH128_hash_t XXH3_128bits_digest (XXH_NOESCAPE const XXH3_state_t* state)
-{
- const unsigned char* const secret = (state->extSecret == NULL) ? state->customSecret : state->extSecret;
- if (state->totalLen > XXH3_MIDSIZE_MAX) {
- XXH_ALIGN(XXH_ACC_ALIGN) XXH64_hash_t acc[XXH_ACC_NB];
- XXH3_digest_long(acc, state, secret);
- XXH_ASSERT(state->secretLimit + XXH_STRIPE_LEN >= sizeof(acc) + XXH_SECRET_MERGEACCS_START);
- { XXH128_hash_t h128;
- h128.low64 = XXH3_mergeAccs(acc,
- secret + XXH_SECRET_MERGEACCS_START,
- (xxh_u64)state->totalLen * XXH_PRIME64_1);
- h128.high64 = XXH3_mergeAccs(acc,
- secret + state->secretLimit + XXH_STRIPE_LEN
- - sizeof(acc) - XXH_SECRET_MERGEACCS_START,
- ~((xxh_u64)state->totalLen * XXH_PRIME64_2));
- return h128;
- }
- }
- /* len <= XXH3_MIDSIZE_MAX : short code */
- if (state->seed)
- return XXH3_128bits_withSeed(state->buffer, (size_t)state->totalLen, state->seed);
- return XXH3_128bits_withSecret(state->buffer, (size_t)(state->totalLen),
- secret, state->secretLimit + XXH_STRIPE_LEN);
-}
-#endif /* !XXH_NO_STREAM */
-/* 128-bit utility functions */
-
-#include <string.h> /* memcmp, memcpy */
-
-/* return : 1 is equal, 0 if different */
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API int XXH128_isEqual(XXH128_hash_t h1, XXH128_hash_t h2)
-{
- /* note : XXH128_hash_t is compact, it has no padding byte */
- return !(memcmp(&h1, &h2, sizeof(h1)));
-}
-
-/* This prototype 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 */
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API int XXH128_cmp(XXH_NOESCAPE const void* h128_1, XXH_NOESCAPE const void* h128_2)
-{
- XXH128_hash_t const h1 = *(const XXH128_hash_t*)h128_1;
- XXH128_hash_t const h2 = *(const XXH128_hash_t*)h128_2;
- int const hcmp = (h1.high64 > h2.high64) - (h2.high64 > h1.high64);
- /* note : bets that, in most cases, hash values are different */
- if (hcmp) return hcmp;
- return (h1.low64 > h2.low64) - (h2.low64 > h1.low64);
-}
-
-
-/*====== Canonical representation ======*/
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API void
-XXH128_canonicalFromHash(XXH_NOESCAPE XXH128_canonical_t* dst, XXH128_hash_t hash)
-{
- XXH_STATIC_ASSERT(sizeof(XXH128_canonical_t) == sizeof(XXH128_hash_t));
- if (XXH_CPU_LITTLE_ENDIAN) {
- hash.high64 = XXH_swap64(hash.high64);
- hash.low64 = XXH_swap64(hash.low64);
- }
- XXH_memcpy(dst, &hash.high64, sizeof(hash.high64));
- XXH_memcpy((char*)dst + sizeof(hash.high64), &hash.low64, sizeof(hash.low64));
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH128_hash_t
-XXH128_hashFromCanonical(XXH_NOESCAPE const XXH128_canonical_t* src)
-{
- XXH128_hash_t h;
- h.high64 = XXH_readBE64(src);
- h.low64 = XXH_readBE64(src->digest + 8);
- return h;
-}
-
-
-
-/* ==========================================
- * Secret generators
- * ==========================================
- */
-#define XXH_MIN(x, y) (((x) > (y)) ? (y) : (x))
-
-XXH_FORCE_INLINE void XXH3_combine16(void* dst, XXH128_hash_t h128)
-{
- XXH_writeLE64( dst, XXH_readLE64(dst) ^ h128.low64 );
- XXH_writeLE64( (char*)dst+8, XXH_readLE64((char*)dst+8) ^ h128.high64 );
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API XXH_errorcode
-XXH3_generateSecret(XXH_NOESCAPE void* secretBuffer, size_t secretSize, XXH_NOESCAPE const void* customSeed, size_t customSeedSize)
-{
-#if (XXH_DEBUGLEVEL >= 1)
- XXH_ASSERT(secretBuffer != NULL);
- XXH_ASSERT(secretSize >= XXH3_SECRET_SIZE_MIN);
-#else
- /* production mode, assert() are disabled */
- if (secretBuffer == NULL) return XXH_ERROR;
- if (secretSize < XXH3_SECRET_SIZE_MIN) return XXH_ERROR;
-#endif
-
- if (customSeedSize == 0) {
- customSeed = XXH3_kSecret;
- customSeedSize = XXH_SECRET_DEFAULT_SIZE;
- }
-#if (XXH_DEBUGLEVEL >= 1)
- XXH_ASSERT(customSeed != NULL);
-#else
- if (customSeed == NULL) return XXH_ERROR;
-#endif
-
- /* Fill secretBuffer with a copy of customSeed - repeat as needed */
- { size_t pos = 0;
- while (pos < secretSize) {
- size_t const toCopy = XXH_MIN((secretSize - pos), customSeedSize);
- memcpy((char*)secretBuffer + pos, customSeed, toCopy);
- pos += toCopy;
- } }
-
- { size_t const nbSeg16 = secretSize / 16;
- size_t n;
- XXH128_canonical_t scrambler;
- XXH128_canonicalFromHash(&scrambler, XXH128(customSeed, customSeedSize, 0));
- for (n=0; n<nbSeg16; n++) {
- XXH128_hash_t const h128 = XXH128(&scrambler, sizeof(scrambler), n);
- XXH3_combine16((char*)secretBuffer + n*16, h128);
- }
- /* last segment */
- XXH3_combine16((char*)secretBuffer + secretSize - 16, XXH128_hashFromCanonical(&scrambler));
- }
- return XXH_OK;
-}
-
-/*! @ingroup XXH3_family */
-XXH_PUBLIC_API void
-XXH3_generateSecret_fromSeed(XXH_NOESCAPE void* secretBuffer, XXH64_hash_t seed)
-{
- XXH_ALIGN(XXH_SEC_ALIGN) xxh_u8 secret[XXH_SECRET_DEFAULT_SIZE];
- XXH3_initCustomSecret(secret, seed);
- XXH_ASSERT(secretBuffer != NULL);
- memcpy(secretBuffer, secret, XXH_SECRET_DEFAULT_SIZE);
-}
-
-
-
-/* Pop our optimization override from above */
-#if XXH_VECTOR == XXH_AVX2 /* AVX2 */ \
- && defined(__GNUC__) && !defined(__clang__) /* GCC, not Clang */ \
- && defined(__OPTIMIZE__) && XXH_SIZE_OPT <= 0 /* respect -O0 and -Os */
-# pragma GCC pop_options
-#endif
-
-#endif /* XXH_NO_LONG_LONG */
-
-#endif /* XXH_NO_XXH3 */
-
-/*!
- * @}
- */
-#endif /* XXH_IMPLEMENTATION */
-
-
-#if defined (__cplusplus)
-} /* extern "C" */
-#endif
projects / thirdparty / ccache.git / commitdiff
