Function getUnsignedBitfield

app/redis-6.2.6/src/bitops.c:229–241

}

uint64_t getUnsignedBitfield(unsigned char *p, uint64_t offset, uint64_t bits) {
    uint64_t byte, bit, byteval, bitval, j, value = 0;

    for (j = 0; j < bits; j++) {
        byte = offset >> 3;
        bit = 7 - (offset & 0x7);
        byteval = p[byte];
        bitval = (byteval >> bit) & 1;
        value = (value<<1) | bitval;
        offset++;
    }
    return value;
}

int64_t getSignedBitfield(unsigned char *p, uint64_t offset, uint64_t bits) {
    int64_t value;