Function hllAdd

src/hyperloglog.cpp:1059–1066

Call hllDenseAdd() or hllSparseAdd() according to the HLL encoding. */

/* Call hllDenseAdd() or hllSparseAdd() according to the HLL encoding. */
int hllAdd(robj *o, unsigned char *ele, size_t elesize) {
    struct hllhdr *hdr = (hllhdr*)ptrFromObj(o);
    switch(hdr->encoding) {
    case HLL_DENSE: return hllDenseAdd(hdr->registers(),ele,elesize);
    case HLL_SPARSE: return hllSparseAdd(o,ele,elesize);
    default: return -1; /* Invalid representation. */
    }
}

/* Merge by computing MAX(registers[i],hll[i]) the HyperLogLog 'hll'
 * with an array of uint8_t HLL_REGISTERS registers pointed by 'max'.