Method multiply

cpp/fory/serialization/compatible_scalar.cc:64–78

  }

  void multiply(uint32_t factor) {
    if (factor == 0 || is_zero()) {
      limbs.clear();
      return;
    }
    uint64_t carry = 0;
    for (uint32_t &limb : limbs) {
      uint64_t value = static_cast<uint64_t>(limb) * factor + carry;
      limb = static_cast<uint32_t>(value);
      carry = value >> 32;
    }
    if (carry != 0) {
      limbs.push_back(static_cast<uint32_t>(carry));
    }
  }

  void add(uint32_t value) {
    uint64_t carry = value;