C++ (Cpp) fch_calc_p2 Examples

Example #1

File: fch.c Project: fullstackenviormentss/sbmt

static fch_buckets_t * mapping(cmph_config_t *mph)
{
	cmph_uint32 i = 0;
	fch_buckets_t *buckets = NULL;
	fch_config_data_t *fch = (fch_config_data_t *)mph->data;
	if (fch->h1) hash_state_destroy(fch->h1);
	fch->h1 = hash_state_new(fch->hashfuncs[0], fch->m);  
	fch->b = fch_calc_b(fch->c, fch->m);
	fch->p1 = fch_calc_p1(fch->m);
	fch->p2 = fch_calc_p2(fch->b);
	//DEBUGP("b:%u   p1:%f   p2:%f\n", fch->b, fch->p1, fch->p2);
	buckets = fch_buckets_new(fch->b);

	mph->key_source->rewind(mph->key_source->data);  
	for(i = 0; i < fch->m; i++)
	{
		cmph_uint32 h1, keylen;
		char *key = NULL;
		mph->key_source->read(mph->key_source->data, &key, &keylen);	
		h1 = hash(fch->h1, key, keylen) % fch->m;
		h1 = mixh10h11h12 (fch->b, fch->p1, fch->p2, h1);
		fch_buckets_insert(buckets, h1, key, keylen);
		key = NULL; // transger memory ownership
		
	}
	return buckets;  
}

Example #2

File: brz.c Project: ceibal-tatu/gobject-introspection

static cmph_uint32 brz_fch_search_packed(cmph_uint32 *packed_mphf, const char *key, cmph_uint32 keylen, cmph_uint32 * fingerprint)
{
	register CMPH_HASH h0_type = *packed_mphf++;
	
	register cmph_uint32 *h0_ptr = packed_mphf;
	packed_mphf = (cmph_uint32 *)(((cmph_uint8 *)packed_mphf) + hash_state_packed_size(h0_type)); 
	
	register cmph_uint32 k = *packed_mphf++;

	register double c = (double)(*((cmph_uint64*)packed_mphf));
	packed_mphf += 2;

	register CMPH_HASH h1_type = *packed_mphf++; 

	register CMPH_HASH h2_type = *packed_mphf++; 

	register cmph_uint8 * size = (cmph_uint8 *) packed_mphf;
	packed_mphf = (cmph_uint32 *)(size + k);  
	
	register cmph_uint32 * offset = packed_mphf;
	packed_mphf += k;
	
	register cmph_uint32 h0;
	
	hash_vector_packed(h0_ptr, h0_type, key, keylen, fingerprint);
	h0 = fingerprint[2] % k;
	
	register cmph_uint32 m = size[h0];
	register cmph_uint32 b = fch_calc_b(c, m);
	register double p1 = fch_calc_p1(m);
	register double p2 = fch_calc_p2(b);
	
	#if defined (__ia64) || defined (__x86_64__)
		register cmph_uint64 * g_is_ptr = (cmph_uint64 *)packed_mphf;
	#else
		register cmph_uint32 * g_is_ptr = packed_mphf;
	#endif
	
	register cmph_uint8 * h1_ptr = (cmph_uint8 *) g_is_ptr[h0];
	
	register cmph_uint8 * h2_ptr = h1_ptr + hash_state_packed_size(h1_type);

	register cmph_uint8 * g = h2_ptr + hash_state_packed_size(h2_type);
	
	register cmph_uint32 h1 = hash_packed(h1_ptr, h1_type, key, keylen) % m;
	register cmph_uint32 h2 = hash_packed(h2_ptr, h2_type, key, keylen) % m;

	register cmph_uint8 mphf_bucket = 0;
	h1 = mixh10h11h12(b, p1, p2, h1);
	mphf_bucket = (cmph_uint8)((h2 + g[h1]) % m);
	return (mphf_bucket + offset[h0]);
}

Example #3

File: brz.c Project: ceibal-tatu/gobject-introspection

static cmph_uint32 brz_fch_search(brz_data_t *brz, const char *key, cmph_uint32 keylen, cmph_uint32 * fingerprint)
{
	register cmph_uint32 h0;

	hash_vector(brz->h0, key, keylen, fingerprint);
	h0 = fingerprint[2] % brz->k;

	register cmph_uint32 m = brz->size[h0];
	register cmph_uint32 b = fch_calc_b(brz->c, m);
	register double p1 = fch_calc_p1(m);
	register double p2 = fch_calc_p2(b);
	register cmph_uint32 h1 = hash(brz->h1[h0], key, keylen) % m;
	register cmph_uint32 h2 = hash(brz->h2[h0], key, keylen) % m;
	register cmph_uint8 mphf_bucket = 0;
	h1 = mixh10h11h12(b, p1, p2, h1);
	mphf_bucket = (cmph_uint8)((h2 + brz->g[h0][h1]) % m);
	return (mphf_bucket + brz->offset[h0]);
}