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|
#ifndef ANY_HASH_INCLUDE
#define ANY_HASH_INCLUDE
#include <stdint.h>
#include <stddef.h>
#ifndef ANY_HASH_NO_XXH32
typedef uint32_t any_hash32_t;
any_hash32_t any_hash_xxh32(const uint8_t *data, size_t length, any_hash32_t seed);
#endif
#ifndef ANY_HASH_NO_XXH64
typedef uint64_t any_hash64_t;
any_hash64_t any_hash_xxh64(const uint8_t *data, size_t length, any_hash64_t seed);
#endif
#endif
#ifdef ANY_HASH_IMPLEMENT
#include <string.h>
#define ANY_HASH_ALIGNED 0
#define ANY_HASH_ROTL1 1
#define ANY_HASH_ROTL2 7
#define ANY_HASH_ROTL3 12
#define ANY_HASH_ROTL4 18
#ifndef ANY_HASH_LIKELY
#ifdef __has_builtin
#if __has_builtin(__builtin_expect)
#define ANY_HASH_LIKELY(...) __builtin_expect(!!(__VA_ARGS__), 1)
#endif
#endif
#ifndef ANY_HASH_LIKELY
#define ANY_HASH_LIKELY(...)
#endif
#endif
#ifndef ANY_HASH_RUNTIME_ENDIAN
#ifndef ANY_HASH_LE
#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ || \
defined(__BIG_ENDIAN__) || defined(__BIG_ENDIAN) || defined(_BIG_ENDIAN)
#define ANY_HASH_LE 0
#else
#define ANY_HASH_LE 1
#endif
#endif
static bool any_hash_little_endian = ANY_HASH_LE;
#else
static int any_hash_test_endian = 1;
static bool any_hash_little_endian = *((char *)&any_hash_test_endian);
#endif
#ifndef ANY_HASH_NO_XXH32
#define ANY_HASH_BYTES32 sizeof(any_hash32_t)
#define ANY_HASH_DATALEN32 16
#define ANY_HASH_ALIGN32 3
#define ANY_HASH_ROUND32 13
#define ANY_HASH_AV32_1 15
#define ANY_HASH_AV32_2 13
#define ANY_HASH_AV32_3 16
#define ANY_HASH_PROC32_1 17
#define ANY_HASH_PROC32_2 11
#define ANY_HASH_PRIME32_1 2654435761u
#define ANY_HASH_PRIME32_2 2246822519u
#define ANY_HASH_PRIME32_3 3266489917u
#define ANY_HASH_PRIME32_4 668265263u
#define ANY_HASH_PRIME32_5 374761393u
#ifdef __has_builtin
#if __has_builtin(__builtin_bswap32)
#define ANY_HASH_SWAP32 __builtin_bswap32
#endif
#if __has_builtin(__builtin_rotateleft32)
#define ANY_HASH_ROTL32 __builtin_rotateleft32
#endif
#endif
#ifndef ANY_HASH_SWAP32
#define ANY_HASH_SWAP32 any_hash_swap32
static inline any_hash32_t any_hash_swap32(any_hash32_t hash)
{
return ((hash << 24) & 0xff000000) |
((hash << 8) & 0x00ff0000) |
((hash << 8) & 0x0000ff00) |
((hash << 24) & 0x000000ff);
}
#endif
#ifndef ANY_HASH_ROTL32
#define ANY_HASH_ROTL32 any_hash_rotl32
static inline any_hash32_t any_hash_rotl32(any_hash32_t hash, uint32_t bits)
{
return (hash << bits) | (hash >> (32 - bits));
}
#endif
static inline any_hash32_t any_hash_fetch32(const uint8_t *data, int_fast32_t align)
{
if (ANY_HASH_LIKELY(align == ANY_HASH_ALIGNED))
return any_hash_little_endian
? *(const any_hash32_t *)data
: ANY_HASH_SWAP32(*(const any_hash32_t *)data);
any_hash32_t hash;
memcpy(&hash, data, 4);
return any_hash_little_endian
? hash
: ANY_HASH_SWAP32(hash);
}
static inline any_hash32_t any_hash_avalanche32(any_hash32_t hash)
{
hash ^= hash >> ANY_HASH_AV32_1;
hash *= ANY_HASH_PRIME32_2;
hash ^= hash >> ANY_HASH_AV32_2;
hash *= ANY_HASH_PRIME32_3;
hash ^= hash >> ANY_HASH_AV32_3;
return hash;
}
static any_hash32_t any_hash_round32(any_hash32_t hash, any_hash32_t next)
{
hash += next * ANY_HASH_PRIME32_2;
hash = ANY_HASH_ROTL32(hash, ANY_HASH_ROUND32);
hash *= ANY_HASH_PRIME32_1;
return hash;
}
any_hash32_t any_hash_xxh32(const uint8_t *data, size_t length, any_hash32_t seed)
{
any_hash32_t hash;
const int_fast32_t align = (uintptr_t)data & ANY_HASH_ALIGN32;
if (length >= ANY_HASH_DATALEN32) {
const uint8_t *const end = data + length - ANY_HASH_DATALEN32;
any_hash32_t st1 = seed + ANY_HASH_PRIME32_1 + ANY_HASH_PRIME32_2;
any_hash32_t st2 = seed + ANY_HASH_PRIME32_2;
any_hash32_t st3 = seed;
any_hash32_t st4 = seed - ANY_HASH_PRIME32_1;
do {
st1 = any_hash_round32(st1, any_hash_fetch32(data, align));
data += ANY_HASH_BYTES32;
st2 = any_hash_round32(st2, any_hash_fetch32(data, align));
data += ANY_HASH_BYTES32;
st3 = any_hash_round32(st3, any_hash_fetch32(data, align));
data += ANY_HASH_BYTES32;
st4 = any_hash_round32(st4, any_hash_fetch32(data, align));
data += ANY_HASH_BYTES32;
} while (data <= end);
hash = ANY_HASH_ROTL32(st1, ANY_HASH_ROTL1) + ANY_HASH_ROTL32(st2, ANY_HASH_ROTL2)
+ ANY_HASH_ROTL32(st3, ANY_HASH_ROTL3) + ANY_HASH_ROTL32(st4, ANY_HASH_ROTL4);
} else
hash = seed + ANY_HASH_PRIME32_5;
hash += length;
length &= (ANY_HASH_DATALEN32 - 1);
while (length >= 4) {
hash += any_hash_fetch32(data, align) * ANY_HASH_PRIME32_3;
hash = ANY_HASH_ROTL32(hash, ANY_HASH_PROC32_1) * ANY_HASH_PRIME32_4;
data += ANY_HASH_BYTES32;
length -= ANY_HASH_BYTES32;
}
while (length > 0) {
hash += (*data++) * ANY_HASH_PRIME32_5;
hash = ANY_HASH_ROTL32(hash, ANY_HASH_PROC32_2) * ANY_HASH_PRIME32_1;
--length;
}
return any_hash_avalanche32(hash);
}
#endif
#ifndef ANY_HASH_NO_XXH64
#define ANY_HASH_BYTES64 sizeof(any_hash64_t)
#define ANY_HASH_DATALEN64 32
#define ANY_HASH_ALIGN64 7
#define ANY_HASH_ROUND64 31
#define ANY_HASH_AV64_1 33
#define ANY_HASH_AV64_2 29
#define ANY_HASH_AV64_3 32
#define ANY_HASH_PROC64_1 27
#define ANY_HASH_PROC64_2 23
#define ANY_HASH_PROC64_3 11
#define ANY_HASH_PRIME64_1 11400714785074694791ull
#define ANY_HASH_PRIME64_2 14029467366897019727ull
#define ANY_HASH_PRIME64_3 1609587929392839161ull
#define ANY_HASH_PRIME64_4 9650029242287828579ull
#define ANY_HASH_PRIME64_5 2870177450012600261ull
#ifdef __has_builtin
#if __has_builtin(__builtin_bswap64)
#define ANY_HASH_SWAP64 __builtin_bswap64
#endif
#if __has_builtin(__builtin_rotateleft64)
#define ANY_HASH_ROTL64 __builtin_rotateleft64
#endif
#endif
#ifndef ANY_HASH_SWAP64
#define ANY_HASH_SWAP64 any_hash_swap64
static inline any_hash64_t any_hash_swap64(any_hash64_t hash)
{
return ((hash << 56) & 0xff00000000000000ull) |
((hash << 40) & 0x00ff000000000000ull) |
((hash << 24) & 0x0000ff0000000000ull) |
((hash << 8) & 0x000000ff00000000ull) |
((hash >> 8) & 0x00000000ff000000ull) |
((hash >> 24) & 0x0000000000ff0000ull) |
((hash >> 40) & 0x000000000000ff00ull) |
((hash >> 56) & 0x00000000000000ffull);
}
#endif
#ifndef ANY_HASH_ROTL64
#define ANY_HASH_ROTL64 any_hash_rotl64
static inline any_hash64_t any_hash_rotl64(any_hash64_t hash, uint32_t bits)
{
return (hash << bits) | (hash >> (64 - bits));
}
#endif
static inline any_hash64_t any_hash_fetch64(const uint8_t *data, int_fast32_t align)
{
if (ANY_HASH_LIKELY(align == ANY_HASH_ALIGNED))
return any_hash_little_endian
? *(const any_hash64_t *)data
: ANY_HASH_SWAP64(*(const any_hash64_t *)data);
any_hash64_t hash;
memcpy(&hash, data, 8);
return any_hash_little_endian
? hash
: ANY_HASH_SWAP64(hash);
}
static inline any_hash64_t any_hash_avalanche64(any_hash64_t hash)
{
hash ^= hash >> ANY_HASH_AV64_1;
hash *= ANY_HASH_PRIME64_2;
hash ^= hash >> ANY_HASH_AV64_2;
hash *= ANY_HASH_PRIME64_3;
hash ^= hash >> ANY_HASH_AV64_3;
return hash;
}
static any_hash64_t any_hash_round64(any_hash64_t hash, any_hash64_t next)
{
hash += next * ANY_HASH_PRIME64_2;
hash = ANY_HASH_ROTL64(hash, ANY_HASH_ROUND64);
hash *= ANY_HASH_PRIME64_1;
return hash;
}
static any_hash64_t any_hash_round64_merge(any_hash64_t hash, any_hash64_t next)
{
hash ^= any_hash_round64(0, next);
hash = hash * ANY_HASH_PRIME64_1 + ANY_HASH_PRIME64_4;
return hash;
}
any_hash64_t any_hash_xxh64(const uint8_t *data, size_t length, any_hash64_t seed)
{
any_hash64_t hash;
const int_fast32_t align = (uintptr_t)data & ANY_HASH_ALIGN64;
if (length >= ANY_HASH_DATALEN64) {
const uint8_t *const end = data + length - ANY_HASH_DATALEN64;
any_hash64_t st1 = seed + ANY_HASH_PRIME64_1 + ANY_HASH_PRIME64_2;
any_hash64_t st2 = seed + ANY_HASH_PRIME64_2;
any_hash64_t st3 = seed;
any_hash64_t st4 = seed - ANY_HASH_PRIME64_1;
do {
st1 = any_hash_round64(st1, any_hash_fetch64(data, align));
data += ANY_HASH_BYTES64;
st2 = any_hash_round64(st2, any_hash_fetch64(data, align));
data += ANY_HASH_BYTES64;
st3 = any_hash_round64(st3, any_hash_fetch64(data, align));
data += ANY_HASH_BYTES64;
st4 = any_hash_round64(st4, any_hash_fetch64(data, align));
data += ANY_HASH_BYTES64;
} while (data <= end);
hash = ANY_HASH_ROTL64(st1, ANY_HASH_ROTL1) + ANY_HASH_ROTL64(st2, ANY_HASH_ROTL2)
+ ANY_HASH_ROTL64(st3, ANY_HASH_ROTL3) + ANY_HASH_ROTL64(st4, ANY_HASH_ROTL4);
hash = any_hash_round64_merge(hash, st1);
hash = any_hash_round64_merge(hash, st2);
hash = any_hash_round64_merge(hash, st3);
hash = any_hash_round64_merge(hash, st4);
} else
hash = seed + ANY_HASH_PRIME64_5;
hash += length;
length &= (ANY_HASH_DATALEN64 - 1);
while (length >= 8) {
hash ^= any_hash_round64(0, any_hash_fetch64(data, align));
hash = ANY_HASH_ROTL64(hash, ANY_HASH_PROC64_1) * ANY_HASH_PRIME64_1 + ANY_HASH_PRIME64_4;
data += ANY_HASH_BYTES64;
length -= ANY_HASH_BYTES64;
}
while (length >= 4) {
hash ^= (any_hash64_t)(any_hash_fetch32(data, align)) * ANY_HASH_PRIME64_1;
hash = ANY_HASH_ROTL64(hash, ANY_HASH_PROC64_2) * ANY_HASH_PRIME64_2 + ANY_HASH_PRIME64_3;
data += ANY_HASH_BYTES32;
length -= ANY_HASH_BYTES32;
}
while (length > 0) {
hash ^= (*data++) * ANY_HASH_PRIME64_5;
hash = ANY_HASH_ROTL64(hash, ANY_HASH_PROC64_3) * ANY_HASH_PRIME64_1;
--length;
}
return any_hash_avalanche64(hash);
}
#endif
#endif
|
