-//-----------------------------------------------------------------------------
-//MurmurHash3 was written by Austin Appleby, and is placed in the public
-//domain. The author hereby disclaims copyright to this source code.
-
-// Note - The x86 and x64 versions do _not_ produce the same results, as the
-// algorithms are optimized for their respective platforms. You can still
-// compile and run any of them on any platform, but your performance with the
-// non-native version will be less than optimal.
+/*
+ +--------------------------------------------------------------------+
+ | libmemcached - C/C++ Client Library for memcached |
+ +--------------------------------------------------------------------+
+ | Redistribution and use in source and binary forms, with or without |
+ | modification, are permitted under the terms of the BSD license. |
+ | You should have received a copy of the license in a bundled file |
+ | named LICENSE; in case you did not receive a copy you can review |
+ | the terms online at: https://opensource.org/licenses/BSD-3-Clause |
+ +--------------------------------------------------------------------+
+ | Copyright (c) 2006-2014 Brian Aker https://datadifferential.com/ |
+ | Copyright (c) 2020 Michael Wallner <mike@php.net> |
+ +--------------------------------------------------------------------+
+*/
#include "libhashkit/hashkitcon.h"
// Platform-specific functions and macros
#ifdef __GNUC__
-#define FORCE_INLINE __attribute__((always_inline)) inline
+# define FORCE_INLINE __attribute__((always_inline)) inline
#else
-#define FORCE_INLINE inline
+# define FORCE_INLINE inline
#endif
-static FORCE_INLINE uint32_t rotl32 ( uint32_t x, int8_t r )
-{
+static FORCE_INLINE uint32_t rotl32(uint32_t x, int8_t r) {
return (x << r) | (x >> (32 - r));
}
-static FORCE_INLINE uint64_t rotl64 ( uint64_t x, int8_t r )
-{
- return (x << r) | (x >> (64 - r));
-}
-
-#define ROTL32(x,y) rotl32(x,y)
-#define ROTL64(x,y) rotl64(x,y)
-
-#define BIG_CONSTANT(x) (x##LLU)
+#define ROTL32(x, y) rotl32(x, y)
//-----------------------------------------------------------------------------
// Block read - if your platform needs to do endian-swapping or can only
// handle aligned reads, do the conversion here
+#include <cassert>
#include <cstring>
-template <typename T>
+template<typename T>
static inline T getblock(const T *blocks, int i) {
T b;
memcpy(&b, ((const uint8_t *) blocks) + i * sizeof(T), sizeof(T));
//-----------------------------------------------------------------------------
// Finalization mix - force all bits of a hash block to avalanche
-static FORCE_INLINE uint32_t fmix32 ( uint32_t h )
-{
+static FORCE_INLINE uint32_t fmix32(uint32_t h) {
h ^= h >> 16;
h *= 0x85ebca6b;
h ^= h >> 13;
return h;
}
-//----------
-
-static FORCE_INLINE uint64_t fmix64 ( uint64_t k )
-{
- k ^= k >> 33;
- k *= BIG_CONSTANT(0xff51afd7ed558ccd);
- k ^= k >> 33;
- k *= BIG_CONSTANT(0xc4ceb9fe1a85ec53);
- k ^= k >> 33;
-
- return k;
-}
-
//-----------------------------------------------------------------------------
-void MurmurHash3_x86_32 ( const void * key, int len,
- uint32_t seed, void * out )
-{
- const uint8_t * data = (const uint8_t*)key;
+void MurmurHash3_x86_32(const void *key, int len, uint32_t seed, void *out) {
+ const uint8_t *data = (const uint8_t *) key;
const int nblocks = len / 4;
int i;
//----------
// body
- const uint32_t * blocks = (const uint32_t *)(data + nblocks*4);
+ const uint32_t *blocks = (const uint32_t *) (data + nblocks * 4);
- for(i = -nblocks; i; i++)
- {
- uint32_t k1 = getblock(blocks,i);
+ for (i = -nblocks; i; i++) {
+ uint32_t k1 = getblock(blocks, i);
+#if WORDS_BIGENDIAN
+ k1 = BYTESWAP_32(k1);
+#endif
k1 *= c1;
- k1 = ROTL32(k1,15);
+ k1 = ROTL32(k1, 15);
k1 *= c2;
-
+
h1 ^= k1;
- h1 = ROTL32(h1,13);
- h1 = h1*5+0xe6546b64;
+ h1 = ROTL32(h1, 13);
+ h1 = h1 * 5 + 0xe6546b64;
}
//----------
// tail
- const uint8_t * tail = (const uint8_t*)(data + nblocks*4);
+ const uint8_t *tail = (const uint8_t *) (data + nblocks * 4);
uint32_t k1 = 0;
+ memcpy(&k1, tail, len & 3);
+#if WORDS_BIGENDIAN
+ k1 = BYTESWAP_32(k1);
+#endif
- switch(len & 3)
- {
- case 3: k1 ^= tail[2] << 16;
- /* fall through */
- case 2: k1 ^= tail[1] << 8;
- /* fall through */
- case 1: k1 ^= tail[0];
- k1 *= c1; k1 = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
- };
+ k1 *= c1;
+ k1 = ROTL32(k1, 15);
+ k1 *= c2;
+ h1 ^= k1;
//----------
// finalization
h1 = fmix32(h1);
- *(uint32_t*)out = h1;
-}
-
-//-----------------------------------------------------------------------------
-
-void MurmurHash3_x86_128 ( const void * key, const int len,
- uint32_t seed, void * out )
-{
- const uint8_t * data = (const uint8_t*)key;
- const int nblocks = len / 16;
- int i;
-
- uint32_t h1 = seed;
- uint32_t h2 = seed;
- uint32_t h3 = seed;
- uint32_t h4 = seed;
-
- uint32_t c1 = 0x239b961b;
- uint32_t c2 = 0xab0e9789;
- uint32_t c3 = 0x38b34ae5;
- uint32_t c4 = 0xa1e38b93;
-
- //----------
- // body
-
- const uint32_t * blocks = (const uint32_t *)(data + nblocks*16);
-
- for(i = -nblocks; i; i++)
- {
- uint32_t k1 = getblock(blocks,i*4+0);
- uint32_t k2 = getblock(blocks,i*4+1);
- uint32_t k3 = getblock(blocks,i*4+2);
- uint32_t k4 = getblock(blocks,i*4+3);
-
- k1 *= c1; k1 = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
-
- h1 = ROTL32(h1,19); h1 += h2; h1 = h1*5+0x561ccd1b;
-
- k2 *= c2; k2 = ROTL32(k2,16); k2 *= c3; h2 ^= k2;
-
- h2 = ROTL32(h2,17); h2 += h3; h2 = h2*5+0x0bcaa747;
-
- k3 *= c3; k3 = ROTL32(k3,17); k3 *= c4; h3 ^= k3;
-
- h3 = ROTL32(h3,15); h3 += h4; h3 = h3*5+0x96cd1c35;
-
- k4 *= c4; k4 = ROTL32(k4,18); k4 *= c1; h4 ^= k4;
-
- h4 = ROTL32(h4,13); h4 += h1; h4 = h4*5+0x32ac3b17;
- }
-
- //----------
- // tail
-
- const uint8_t * tail = (const uint8_t*)(data + nblocks*16);
-
- uint32_t k1 = 0;
- uint32_t k2 = 0;
- uint32_t k3 = 0;
- uint32_t k4 = 0;
-
- switch(len & 15)
- {
- case 15: k4 ^= tail[14] << 16;
- /* fall through */
- case 14: k4 ^= tail[13] << 8;
- /* fall through */
- case 13: k4 ^= tail[12] << 0;
- k4 *= c4; k4 = ROTL32(k4,18); k4 *= c1; h4 ^= k4;
- /* fall through */
- case 12: k3 ^= tail[11] << 24;
- /* fall through */
- case 11: k3 ^= tail[10] << 16;
- /* fall through */
- case 10: k3 ^= tail[ 9] << 8;
- /* fall through */
- case 9: k3 ^= tail[ 8] << 0;
- k3 *= c3; k3 = ROTL32(k3,17); k3 *= c4; h3 ^= k3;
- /* fall through */
- case 8: k2 ^= tail[ 7] << 24;
- /* fall through */
- case 7: k2 ^= tail[ 6] << 16;
- /* fall through */
- case 6: k2 ^= tail[ 5] << 8;
- /* fall through */
- case 5: k2 ^= tail[ 4] << 0;
- k2 *= c2; k2 = ROTL32(k2,16); k2 *= c3; h2 ^= k2;
- /* fall through */
- case 4: k1 ^= tail[ 3] << 24;
- /* fall through */
- case 3: k1 ^= tail[ 2] << 16;
- /* fall through */
- case 2: k1 ^= tail[ 1] << 8;
- /* fall through */
- case 1: k1 ^= tail[ 0] << 0;
- k1 *= c1; k1 = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
- };
-
- //----------
- // finalization
-
- h1 ^= len; h2 ^= len; h3 ^= len; h4 ^= len;
-
- h1 += h2; h1 += h3; h1 += h4;
- h2 += h1; h3 += h1; h4 += h1;
-
- h1 = fmix32(h1);
- h2 = fmix32(h2);
- h3 = fmix32(h3);
- h4 = fmix32(h4);
-
- h1 += h2; h1 += h3; h1 += h4;
- h2 += h1; h3 += h1; h4 += h1;
-
- ((uint32_t*)out)[0] = h1;
- ((uint32_t*)out)[1] = h2;
- ((uint32_t*)out)[2] = h3;
- ((uint32_t*)out)[3] = h4;
+ *(uint32_t *) out = h1;
}
-
-//-----------------------------------------------------------------------------
-
-void MurmurHash3_x64_128 ( const void * key, const int len,
- const uint32_t seed, void * out )
-{
- const uint8_t * data = (const uint8_t*)key;
- const int nblocks = len / 16;
- int i;
-
- uint64_t h1 = seed;
- uint64_t h2 = seed;
-
- uint64_t c1 = BIG_CONSTANT(0x87c37b91114253d5);
- uint64_t c2 = BIG_CONSTANT(0x4cf5ad432745937f);
-
- //----------
- // body
-
- const uint64_t * blocks = (const uint64_t *)(data);
-
- for(i = 0; i < nblocks; i++)
- {
- uint64_t k1 = getblock(blocks,i*2+0);
- uint64_t k2 = getblock(blocks,i*2+1);
-
- k1 *= c1; k1 = ROTL64(k1,31); k1 *= c2; h1 ^= k1;
-
- h1 = ROTL64(h1,27); h1 += h2; h1 = h1*5+0x52dce729;
-
- k2 *= c2; k2 = ROTL64(k2,33); k2 *= c1; h2 ^= k2;
-
- h2 = ROTL64(h2,31); h2 += h1; h2 = h2*5+0x38495ab5;
- }
-
- //----------
- // tail
-
- const uint8_t * tail = (const uint8_t*)(data + nblocks*16);
-
- uint64_t k1 = 0;
- uint64_t k2 = 0;
-
- switch(len & 15)
- {
- case 15: k2 ^= (uint64_t)(tail[14]) << 48;
- /* fall through */
- case 14: k2 ^= (uint64_t)(tail[13]) << 40;
- /* fall through */
- case 13: k2 ^= (uint64_t)(tail[12]) << 32;
- /* fall through */
- case 12: k2 ^= (uint64_t)(tail[11]) << 24;
- /* fall through */
- case 11: k2 ^= (uint64_t)(tail[10]) << 16;
- /* fall through */
- case 10: k2 ^= (uint64_t)(tail[ 9]) << 8;
- /* fall through */
- case 9: k2 ^= (uint64_t)(tail[ 8]) << 0;
- k2 *= c2; k2 = ROTL64(k2,33); k2 *= c1; h2 ^= k2;
- /* fall through */
- case 8: k1 ^= (uint64_t)(tail[ 7]) << 56;
- /* fall through */
- case 7: k1 ^= (uint64_t)(tail[ 6]) << 48;
- /* fall through */
- case 6: k1 ^= (uint64_t)(tail[ 5]) << 40;
- /* fall through */
- case 5: k1 ^= (uint64_t)(tail[ 4]) << 32;
- /* fall through */
- case 4: k1 ^= (uint64_t)(tail[ 3]) << 24;
- /* fall through */
- case 3: k1 ^= (uint64_t)(tail[ 2]) << 16;
- /* fall through */
- case 2: k1 ^= (uint64_t)(tail[ 1]) << 8;
- /* fall through */
- case 1: k1 ^= (uint64_t)(tail[ 0]) << 0;
- k1 *= c1; k1 = ROTL64(k1,31); k1 *= c2; h1 ^= k1;
- };
-
- //----------
- // finalization
-
- h1 ^= len; h2 ^= len;
-
- h1 += h2;
- h2 += h1;
-
- h1 = fmix64(h1);
- h2 = fmix64(h2);
-
- h1 += h2;
- h2 += h1;
-
- ((uint64_t*)out)[0] = h1;
- ((uint64_t*)out)[1] = h2;
-}
-
-//-----------------------------------------------------------------------------
-
projects / awesomized / libmemcached / blobdiff