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hash.xxhash.c
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/*
* The MIT License (MIT)
*
* Copyright (c) 2021 TheVice
*
*/
/*
* As reference used:
* xxHash fast digest algorithm. Version 0.1.1 (10/10/18)
* https://github.com/Cyan4973/xxHash/blob/ff5df558b7bad19bc060d756f4dbd528b202c820/doc/xxhash_spec.md
*/
#include "stdc_secure_api.h"
#include "hash.h"
#include "common.h"
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#define ROTATE_LEFT_UINT32_T(VALUE, OFFSET) \
(((VALUE) << (OFFSET)) | (VALUE) >> (32 - (OFFSET)))
static const uint32_t PRIME32_1 = 0x9E3779B1U;
static const uint32_t PRIME32_2 = 0x85EBCA77U;
static const uint32_t PRIME32_3 = 0xC2B2AE3DU;
static const uint32_t PRIME32_4 = 0x27D4EB2FU;
static const uint32_t PRIME32_5 = 0x165667B1U;
#define XXH32_INIT_ACCUMULATORS(ACCUMULATORS, SEED, IS_CHUNK_ONE) \
if (!(ACCUMULATORS)) \
{ \
return 0; \
} \
\
if (IS_CHUNK_ONE) \
{ \
(ACCUMULATORS)[0] = (SEED) + PRIME32_5; \
} \
else \
{ \
(ACCUMULATORS)[0] = (SEED) + PRIME32_1 + PRIME32_2; \
(ACCUMULATORS)[1] = (SEED) + PRIME32_2; \
(ACCUMULATORS)[2] = (SEED); \
(ACCUMULATORS)[3] = (SEED) - PRIME32_1; \
}
#define XXH32_INIT_ACCUMULATORS_ZERO(ACCUMULATORS, SEED, IS_CHUNK_ONE) \
if (!(ACCUMULATORS)) \
{ \
return 0; \
} \
{ \
(ACCUMULATORS)[0] = (SEED) + PRIME32_1 + PRIME32_2; \
(ACCUMULATORS)[1] = (SEED) + PRIME32_2; \
(ACCUMULATORS)[2] = (SEED); \
(ACCUMULATORS)[3] = (SEED) - PRIME32_1; \
}
#define XXH32_INIT_ACCUMULATORS_ONE(ACCUMULATORS, SEED, IS_CHUNK_ONE) \
if (!(ACCUMULATORS)) \
{ \
return 0; \
} \
\
{ \
(ACCUMULATORS)[0] = (SEED) + PRIME32_5; \
} \
#define XXH32_CORE_CHUNKS(START, FINISH, ACCUMULATORS) \
while (16 <= (FINISH) - (START))\
{\
for (uint8_t i = 0; i < 4; ++i, (START) += 4)\
{\
uint32_t result; \
\
if (!hash_algorithm_uint8_t_array_to_uint32_t((START), (START) + 4, &result)) \
{ \
return 0; \
} \
\
(ACCUMULATORS)[i] += result * PRIME32_2; \
(ACCUMULATORS)[i] = ROTATE_LEFT_UINT32_T((ACCUMULATORS)[i], 13); \
(ACCUMULATORS)[i] *= PRIME32_1; \
} \
}
#define XXH32_CORE_CHUNKS_POST(ACCUMULATORS) \
(ACCUMULATORS)[4] += \
ROTATE_LEFT_UINT32_T((ACCUMULATORS)[0], 1) + \
ROTATE_LEFT_UINT32_T((ACCUMULATORS)[1], 7) + \
ROTATE_LEFT_UINT32_T((ACCUMULATORS)[2], 12) + \
ROTATE_LEFT_UINT32_T((ACCUMULATORS)[3], 18);
#define XXH32_FINAL(START, FINISH, LAST_ACCUMULATOR) \
for (; 4 <= (FINISH) - (START); (START) += 4) \
{ \
uint32_t result; \
\
if (!hash_algorithm_uint8_t_array_to_uint32_t((START), (START) + 4, &result)) \
{ \
return 0; \
} \
\
(LAST_ACCUMULATOR) += result * PRIME32_3; \
(LAST_ACCUMULATOR) = ROTATE_LEFT_UINT32_T((LAST_ACCUMULATOR), 17) * PRIME32_4; \
} \
\
for (; 1 <= (FINISH)- (START); ++(START)) \
{ \
(LAST_ACCUMULATOR) += ((uint32_t)(*(START))) * PRIME32_5; \
(LAST_ACCUMULATOR) = ROTATE_LEFT_UINT32_T((LAST_ACCUMULATOR), 11) * PRIME32_1; \
} \
\
(LAST_ACCUMULATOR) ^= (LAST_ACCUMULATOR) >> 15; \
(LAST_ACCUMULATOR) *= PRIME32_2; \
(LAST_ACCUMULATOR) ^= (LAST_ACCUMULATOR) >> 13; \
(LAST_ACCUMULATOR) *= PRIME32_3; \
(LAST_ACCUMULATOR) ^= (LAST_ACCUMULATOR) >> 16;
#define XXHASH_CORE(START, FINISH, QUEUE, QUEUE_SIZE, MAX_QUEUE_SIZE, \
ACCUMULATORS, IS_ACCUMULATORS_INITIALIZED, SEED, \
TYPE, INIT_ACCUMULATORS, CORE_CHUNKS) \
if (!(START) || \
!(FINISH) || \
!(QUEUE) || \
!(ACCUMULATORS) || \
!(IS_ACCUMULATORS_INITIALIZED) || \
(FINISH) < (START)) \
{ \
return 0; \
} \
\
(ACCUMULATORS)[4] += (TYPE)((FINISH) - (START)); \
\
if (*(QUEUE_SIZE)) \
{ \
const ptrdiff_t size = MIN((MAX_QUEUE_SIZE) - *(QUEUE_SIZE), (FINISH) - (START)); \
uint8_t* queue_finish = (QUEUE) + *(QUEUE_SIZE); \
MEM_CPY_C(queue_finish, (START), size); \
*(QUEUE_SIZE) += (uint8_t)size; \
(START) += size; \
} \
\
if (!(*(IS_ACCUMULATORS_INITIALIZED))) \
{ \
if ((MAX_QUEUE_SIZE) == *(QUEUE_SIZE) || (MAX_QUEUE_SIZE) <= (FINISH) - (START)) \
{ \
INIT_ACCUMULATORS((ACCUMULATORS), (SEED), 0) \
*(IS_ACCUMULATORS_INITIALIZED) = 1; \
} \
} \
\
if ((MAX_QUEUE_SIZE) == *(QUEUE_SIZE)) \
{ \
const uint8_t* queue_start = (QUEUE); \
const uint8_t* queue_finish = (QUEUE) + *(QUEUE_SIZE); \
CORE_CHUNKS(queue_start, queue_finish, (ACCUMULATORS)) \
*(QUEUE_SIZE) = 0; \
} \
\
CORE_CHUNKS((START), (FINISH), (ACCUMULATORS)); \
\
if (start < finish) \
{ \
const uint8_t size = MIN((MAX_QUEUE_SIZE), (uint8_t)((FINISH) - (START))); \
MEM_CPY_C((QUEUE), (START), size); \
*(QUEUE_SIZE) += size; \
(START) += size; \
} \
\
return (START) == (FINISH);
uint8_t hash_algorithm_XXH32_core(
const uint8_t* start, const uint8_t* finish,
uint8_t* queue, uint8_t* queue_size, uint8_t max_queue_size,
uint32_t* accumulators, uint8_t* is_accumulators_initialized,
uint32_t seed)
{
#if defined(_MSC_VER) && (_MSC_VER < 1910)
XXHASH_CORE(
start, finish,
queue, queue_size, max_queue_size,
accumulators, is_accumulators_initialized,
seed,
uint32_t,
XXH32_INIT_ACCUMULATORS_ZERO,
XXH32_CORE_CHUNKS);
#else
XXHASH_CORE(
start, finish,
queue, queue_size, max_queue_size,
accumulators, is_accumulators_initialized,
seed,
uint32_t,
XXH32_INIT_ACCUMULATORS,
XXH32_CORE_CHUNKS);
#endif
}
#define XXHASH_FINAL(QUEUE_START, QUEUE_FINISH, \
ACCUMULATORS, IS_ACCUMULATORS_INITIALIZED, \
SEED, OUTPUT, \
INIT_ACCUMULATORS, CORE_CHUNKS, CORE_CHUNKS_POST, \
FINAL) \
if (!(QUEUE_START) || \
!(QUEUE_FINISH) || \
!(ACCUMULATORS) || \
!(OUTPUT) || \
(QUEUE_FINISH) < (QUEUE_START)) \
{ \
return 0; \
} \
\
if (!(IS_ACCUMULATORS_INITIALIZED)) \
{ \
INIT_ACCUMULATORS((ACCUMULATORS), (SEED), 1) \
(ACCUMULATORS)[4] += (ACCUMULATORS)[0]; \
} \
else \
{ \
CORE_CHUNKS((QUEUE_START), (QUEUE_FINISH), (ACCUMULATORS)); \
CORE_CHUNKS_POST(ACCUMULATORS); \
} \
\
FINAL((QUEUE_START), (QUEUE_FINISH), (ACCUMULATORS)[4]); \
*(OUTPUT) = (ACCUMULATORS)[4]; \
return 1;
uint8_t hash_algorithm_XXH32_final(
const uint8_t* queue_start, const uint8_t* queue_finish,
uint32_t* accumulators, uint8_t is_accumulators_initialized,
uint32_t seed, uint32_t* output)
{
#if defined(_MSC_VER) && (_MSC_VER < 1910)
XXHASH_FINAL(
queue_start, queue_finish,
accumulators, is_accumulators_initialized,
seed, output,
XXH32_INIT_ACCUMULATORS_ONE,
XXH32_CORE_CHUNKS,
XXH32_CORE_CHUNKS_POST,
XXH32_FINAL);
#else
XXHASH_FINAL(
queue_start, queue_finish,
accumulators, is_accumulators_initialized,
seed, output,
XXH32_INIT_ACCUMULATORS,
XXH32_CORE_CHUNKS,
XXH32_CORE_CHUNKS_POST,
XXH32_FINAL);
#endif
}
uint8_t hash_algorithm_XXH32(
const uint8_t* start, const uint8_t* finish,
uint32_t seed, uint32_t* output)
{
if (!start ||
!finish ||
!output ||
finish < start)
{
return 0;
}
uint8_t queue[16];
uint8_t queue_size = 0;
const uint8_t max_queue_size = 16;
uint32_t accumulators[5];
uint8_t is_accumulators_initialized = 0;
/**/
accumulators[4] = 0;
if (!hash_algorithm_XXH32_core(start, finish,
queue, &queue_size, max_queue_size,
accumulators, &is_accumulators_initialized, seed))
{
return 0;
}
return hash_algorithm_XXH32_final(
queue, queue + queue_size,
accumulators, is_accumulators_initialized, seed, output);
}
#define ROTATE_LEFT_UINT64_T(VALUE, OFFSET) \
(((VALUE) << (OFFSET)) | (VALUE) >> (64 - (OFFSET)))
#define XXH64_ROUND(OUT, IN, LINE) \
(OUT) = (IN) + (LINE) * PRIME64_2; \
(OUT) = ROTATE_LEFT_UINT64_T((OUT), 31); \
(OUT) *= PRIME64_1;
#define XXH64_MERGE(OUT, SUB_OUT, IN) \
XXH64_ROUND((SUB_OUT), 0, (IN)); \
(OUT) ^= (SUB_OUT); \
(OUT) *= PRIME64_1; \
(OUT) += PRIME64_4;
static const uint64_t PRIME64_1 = 0x9E3779B185EBCA87ULL;
static const uint64_t PRIME64_2 = 0xC2B2AE3D27D4EB4FULL;
static const uint64_t PRIME64_3 = 0x165667B19E3779F9ULL;
static const uint64_t PRIME64_4 = 0x85EBCA77C2B2AE63ULL;
static const uint64_t PRIME64_5 = 0x27D4EB2F165667C5ULL;
#define XXH64_INIT_ACCUMULATORS(ACCUMULATORS, SEED, IS_CHUNK_ONE) \
if (!(ACCUMULATORS)) \
{ \
return 0; \
} \
\
if (IS_CHUNK_ONE) \
{ \
(ACCUMULATORS)[0] = (SEED) + PRIME64_5; \
} \
else \
{ \
(ACCUMULATORS)[0] = (SEED) + PRIME64_1 + PRIME64_2; \
(ACCUMULATORS)[1] = (SEED) + PRIME64_2; \
(ACCUMULATORS)[2] = (SEED); \
(ACCUMULATORS)[3] = (SEED) - PRIME64_1; \
}
#define XXH64_INIT_ACCUMULATORS_ZERO(ACCUMULATORS, SEED, IS_CHUNK_ONE) \
if (!(ACCUMULATORS)) \
{ \
return 0; \
} \
\
{ \
(ACCUMULATORS)[0] = (SEED) + PRIME64_1 + PRIME64_2; \
(ACCUMULATORS)[1] = (SEED) + PRIME64_2; \
(ACCUMULATORS)[2] = (SEED); \
(ACCUMULATORS)[3] = (SEED) - PRIME64_1; \
}
#define XXH64_INIT_ACCUMULATORS_ONE(ACCUMULATORS, SEED, IS_CHUNK_ONE) \
if (!(ACCUMULATORS)) \
{ \
return 0; \
} \
\
{ \
(ACCUMULATORS)[0] = (SEED) + PRIME64_5; \
}
#define XXH64_CORE_CHUNKS(START, FINISH, ACCUMULATORS) \
while (32 <= (FINISH) - (START)) \
{ \
for (uint8_t i = 0; i < 4; ++i, (START) += 8) \
{\
uint64_t result; \
\
if (!hash_algorithm_uint8_t_array_to_uint64_t((START), (START) + 8, &result)) \
{ \
return 0; \
} \
\
XXH64_ROUND((ACCUMULATORS)[i], (ACCUMULATORS)[i], result); \
} \
}
#define XXH64_CORE_CHUNKS_POST(ACCUMULATORS) \
uint64_t result_1 = \
ROTATE_LEFT_UINT64_T((ACCUMULATORS)[0], 1) + \
ROTATE_LEFT_UINT64_T((ACCUMULATORS)[1], 7) + \
ROTATE_LEFT_UINT64_T((ACCUMULATORS)[2], 12) + \
ROTATE_LEFT_UINT64_T((ACCUMULATORS)[3], 18); \
\
for (uint8_t i = 0; i < 4; ++i) \
{ \
uint64_t result_2; \
XXH64_MERGE(result_1, result_2, (ACCUMULATORS)[i]); \
} \
\
(ACCUMULATORS)[4] += result_1;
#define XXH64_FINAL(START, FINISH, LAST_ACCUMULATOR) \
for (; 8 <= (FINISH) - (START); (START) += 8) \
{ \
uint64_t result; \
\
if (!hash_algorithm_uint8_t_array_to_uint64_t((START), (START) + 8, &result)) \
{ \
return 0; \
} \
\
XXH64_ROUND(result, 0, result); \
(LAST_ACCUMULATOR) ^= result; \
(LAST_ACCUMULATOR) = ROTATE_LEFT_UINT64_T((LAST_ACCUMULATOR), 27) * PRIME64_1; \
(LAST_ACCUMULATOR) += PRIME64_4; \
} \
\
for (; 4 <= (FINISH) - (START); (START) += 4) \
{ \
uint32_t result; \
\
if (!hash_algorithm_uint8_t_array_to_uint32_t((START), (START) + 4, &result)) \
{ \
return 0; \
} \
\
(LAST_ACCUMULATOR) ^= (uint64_t)result * PRIME64_1; \
(LAST_ACCUMULATOR) = ROTATE_LEFT_UINT64_T((LAST_ACCUMULATOR), 23) * PRIME64_2; \
(LAST_ACCUMULATOR) += PRIME64_3; \
} \
\
for (; 1 <= (FINISH) - (START); ++(START)) \
{ \
(LAST_ACCUMULATOR) ^= ((uint64_t)(*(START))) * PRIME64_5; \
(LAST_ACCUMULATOR) = ROTATE_LEFT_UINT64_T((LAST_ACCUMULATOR), 11) * PRIME64_1; \
} \
\
(LAST_ACCUMULATOR) ^= (LAST_ACCUMULATOR) >> 33; \
(LAST_ACCUMULATOR) *= PRIME64_2; \
(LAST_ACCUMULATOR) ^= (LAST_ACCUMULATOR) >> 29; \
(LAST_ACCUMULATOR) *= PRIME64_3; \
(LAST_ACCUMULATOR) ^= (LAST_ACCUMULATOR) >> 32;
uint8_t hash_algorithm_XXH64_core(
const uint8_t* start, const uint8_t* finish,
uint8_t* queue, uint8_t* queue_size, uint8_t max_queue_size,
uint64_t* accumulators, uint8_t* is_accumulators_initialized,
uint64_t seed)
{
#if defined(_MSC_VER) && (_MSC_VER < 1910)
XXHASH_CORE(
start, finish,
queue, queue_size, max_queue_size,
accumulators, is_accumulators_initialized,
seed,
uint64_t,
XXH64_INIT_ACCUMULATORS_ZERO,
XXH64_CORE_CHUNKS);
#else
XXHASH_CORE(
start, finish,
queue, queue_size, max_queue_size,
accumulators, is_accumulators_initialized,
seed,
uint64_t,
XXH64_INIT_ACCUMULATORS,
XXH64_CORE_CHUNKS);
#endif
}
uint8_t hash_algorithm_XXH64_final(
const uint8_t* queue_start, const uint8_t* queue_finish,
uint64_t* accumulators, uint8_t is_accumulators_initialized,
uint64_t seed, uint64_t* output)
{
#if defined(_MSC_VER) && (_MSC_VER < 1910)
XXHASH_FINAL(
queue_start, queue_finish,
accumulators, is_accumulators_initialized,
seed, output,
XXH64_INIT_ACCUMULATORS_ONE,
XXH64_CORE_CHUNKS,
XXH64_CORE_CHUNKS_POST,
XXH64_FINAL);
#else
XXHASH_FINAL(
queue_start, queue_finish,
accumulators, is_accumulators_initialized,
seed, output,
XXH64_INIT_ACCUMULATORS,
XXH64_CORE_CHUNKS,
XXH64_CORE_CHUNKS_POST,
XXH64_FINAL);
#endif
}
uint8_t hash_algorithm_XXH64(
const uint8_t* start, const uint8_t* finish,
uint64_t seed, uint64_t* output)
{
if (!start ||
!finish ||
!output ||
finish < start)
{
return 0;
}
uint8_t queue[32];
uint8_t queue_size = 0;
const uint8_t max_queue_size = 32;
uint64_t accumulators[5];
uint8_t is_accumulators_initialized = 0;
/**/
accumulators[4] = 0;
if (!hash_algorithm_XXH64_core(start, finish,
queue, &queue_size, max_queue_size,
accumulators, &is_accumulators_initialized, seed))
{
return 0;
}
return hash_algorithm_XXH64_final(
queue, queue + queue_size,
accumulators, is_accumulators_initialized, seed, output);
}