[BRLTTY] Low-level BrlAPI questions

[Dave Mielke]

[quoted lines by Samuel Thibault on 2021/05/11 at 01:11 +0200]

>I'm also thinking that we could as well just squash the fields isArray
>and hasSubparam into a flags field, since we also want to add can_read
>and can_write, and possibly others in the future. We can make it a 16bit
>field and make isarray bit 0 and hasubparam bit 8. That copes with ABI
>compatibility on little-endian platforms, which is probably all that we
>really care about concerning any potential use of brltty 6.3.

Yes. I tend to prefer the uint16_t :1 syntax, because it makes the code cleaner, but, for now, that'd require a lot of filler fields to make hasSubparam be the eighth.

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