Function VerifyOffset

native/thirdpart/flatbuffers/flatbuffers.h:2440–2451

  }

  uoffset_t VerifyOffset(size_t start) const {
    if (!Verify<uoffset_t>(start)) return 0;
    auto o = ReadScalar<uoffset_t>(buf_ + start);
    // May not point to itself.
    if (!Check(o != 0)) return 0;
    // Can't wrap around / buffers are max 2GB.
    if (!Check(static_cast<soffset_t>(o) >= 0)) return 0;
    // Must be inside the buffer to create a pointer from it (pointer outside
    // buffer is UB).
    if (!Verify(start + o, 1)) return 0;
    return o;
  }

  uoffset_t VerifyOffset(const uint8_t *base, voffset_t start) const {
    return VerifyOffset(static_cast<size_t>(base - buf_) + start);