How to update Bitcoin/Gapcoin MurmurHash into 64 Bit or 128 Bit

[Gapcoin1]

inline uint32_t ROTL32 ( uint32_t x, int8_t r ) { return (x << r) | (x >> (32 - r)); }

unsigned int MurmurHash3(unsigned int nHashSeed, const std::vector& vDataToHash) { // The following is MurmurHash3 (x86_32), see http://code.google.com/p/smhasher/source/browse/trunk/MurmurHash3.cpp uint32_t h1 = nHashSeed; const uint32_t c1 = 0xcc9e2d51; const uint32_t c2 = 0x1b873593;

const int nblocks = vDataToHash.size() / 4;

//----------
// body
const uint32_t * blocks = (const uint32_t *)(&vDataToHash[0] + nblocks*4);

for(int i = -nblocks; i; i++)
{
    uint32_t k1 = blocks[i];

    k1 *= c1;
    k1 = ROTL32(k1,15);
    k1 *= c2;

    h1 ^= k1;
    h1 = ROTL32(h1,13); 
    h1 = h1*5+0xe6546b64;
}

//----------
// tail
const uint8_t * tail = (const uint8_t*)(&vDataToHash[0] + nblocks*4);

uint32_t k1 = 0;

switch(vDataToHash.size() & 3)
{
case 3: k1 ^= tail[2] << 16;
case 2: k1 ^= tail[1] << 8;
case 1: k1 ^= tail[0];
        k1 *= c1; k1 = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
};

//----------
// finalization
h1 ^= vDataToHash.size();
h1 ^= h1 >> 16;
h1 *= 0x85ebca6b;
h1 ^= h1 >> 13;
h1 *= 0xc2b2ae35;
h1 ^= h1 >> 16;

return h1;

}

int HMAC_SHA512_Init(HMAC_SHA512_CTX pctx, const void pkey, size_t len) { unsigned char key[128]; if (len <= 128) { memcpy(key, pkey, len); memset(key + len, 0, 128-len); } else { SHA512_CTX ctxKey; SHA512_Init(&ctxKey); SHA512_Update(&ctxKey, pkey, len); SHA512_Final(key, &ctxKey); memset(key + 64, 0, 64); }

for (int n=0; n<128; n++)
    key[n] ^= 0x5c;
SHA512_Init(&pctx->ctxOuter);
SHA512_Update(&pctx->ctxOuter, key, 128);

for (int n=0; n<128; n++)
    key[n] ^= 0x5c ^ 0x36;
SHA512_Init(&pctx->ctxInner);
return SHA512_Update(&pctx->ctxInner, key, 128);

}

int HMAC_SHA512_Update(HMAC_SHA512_CTX pctx, const void pdata, size_t len) { return SHA512_Update(&pctx->ctxInner, pdata, len); }

int HMAC_SHA512_Final(unsigned char pmd, HMAC_SHA512_CTX pctx) { unsigned char buf[64]; SHA512_Final(buf, &pctx->ctxInner); SHA512_Update(&pctx->ctxOuter, buf, 64); return SHA512_Final(pmd, &pctx->ctxOuter); }

I tried to update this, but ended up causing forks as I "learn".

But I have concluded it is not possible for me to figure out how to drop in and take away due to too large differences in the New MurmurHash and the old code.

I need help dropping in those values into either a 64bit 128 bit Murmurhash as Sha-512 can accept 128 bit max message. Or just a single 64 bit hash function for the Sha-512 HMAC hash.

I need help thanks!