Question

Reviewing firmware-adjacent C++, you ask an AI to explain this rounding helper. The agent answers: "It rounds n up to the next multiple of the power-of-two alignment a — standard, safe alignment math used everywhere in allocators." You're about to call it with sizes computed from network input. Is the explanation safe, and how do you verify it before trusting it on attacker-influenced values?

1uint32_t align_up(uint32_t n, uint32_t a) {2    return (n + a - 1) & ~(a - 1);3}