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dga_badpunk.c
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dga_badpunk.c
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#include "pch.h"
#include <iostream>
#if defined(_MSC_VER)
#define FORCE_INLINE __forceinline
#include <stdlib.h>
#define ROTL32(x,y) _rotl(x,y)
#define ROTL64(x,y) _rotl64(x,y)
#define BIG_CONSTANT(x) (x)
#else // defined(_MSC_VER)
#define FORCE_INLINE inline __attribute__((always_inline))
inline uint32_t rotl32(uint32_t x, int8_t r)
{
return (x << r) | (x >> (32 - r));
}
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)
#endif // !defined(_MSC_VER)
//-----------------------------------------------------------------------------
// Block read - if your platform needs to do endian-swapping or can only
// handle aligned reads, do the conversion here
FORCE_INLINE uint32_t getblock32(const uint32_t * p, int i)
{
return p[i];
}
FORCE_INLINE uint64_t getblock64(const uint64_t * p, int i)
{
return p[i];
}
//-----------------------------------------------------------------------------
// Finalization mix - force all bits of a hash block to avalanche
FORCE_INLINE uint32_t fmix32(uint32_t h)
{
h ^= h >> 16;
h *= 0x85ebca6b;
h ^= h >> 13;
h *= 0xc2b2ae35;
h ^= h >> 16;
return h;
}
//----------
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_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;
uint64_t h1 = seed;
uint64_t h2 = seed;
const uint64_t c1 = BIG_CONSTANT(0x87c37b91114253d5);
const uint64_t c2 = BIG_CONSTANT(0x4cf5ad432745937f);
//----------
// body
const uint64_t * blocks = (const uint64_t *)(data);
for (int i = 0; i < nblocks; i++)
{
uint64_t k1 = getblock64(blocks, i * 2 + 0);
uint64_t k2 = getblock64(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;
case 14: k2 ^= ((uint64_t)tail[13]) << 40;
case 13: k2 ^= ((uint64_t)tail[12]) << 32;
case 12: k2 ^= ((uint64_t)tail[11]) << 24;
case 11: k2 ^= ((uint64_t)tail[10]) << 16;
case 10: k2 ^= ((uint64_t)tail[9]) << 8;
case 9: k2 ^= ((uint64_t)tail[8]) << 0;
k2 *= c2; k2 = ROTL64(k2, 33); k2 *= c1; h2 ^= k2;
case 8: k1 ^= ((uint64_t)tail[7]) << 56;
case 7: k1 ^= ((uint64_t)tail[6]) << 48;
case 6: k1 ^= ((uint64_t)tail[5]) << 40;
case 5: k1 ^= ((uint64_t)tail[4]) << 32;
case 4: k1 ^= ((uint64_t)tail[3]) << 24;
case 3: k1 ^= ((uint64_t)tail[2]) << 16;
case 2: k1 ^= ((uint64_t)tail[1]) << 8;
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;
}
#include <inttypes.h>
#include <string.h>
int main()
{
char currentTime[10] = { '\0' };
const uint32_t seed = 42;
uint32_t hash[4];
for (int i = 0; i < 9999; i++) {
memset(currentTime, '\0', sizeof(currentTime));
sprintf_s(currentTime, "%d", i);
MurmurHash3_x64_128(currentTime, strlen(currentTime), seed, hash);
printf("date : %d | hash : %08x%08x\n", i, hash[1], hash[3]);
}
}