Re: Exporting functions from vsprintf.c for Rust

[Remo Senekowitsch]

On Fri Apr 11, 2025 at 11:42 AM CEST, Petr Mladek wrote:
>
> Honestly, I do not have a good feeling about exporting the internal
> vsprintf() functions. They have a very specific semantic.
>
> Especially, they return pointer to the next-to-write character.
> And it might be even beyond the given *end pointer. It is because, for
> example, vsnprintf() returns the number of characters which would
> have been written to the buffer when it was big enough.
>
> Instead, I suggest to create a wrapper which would have a sane
> semantic and call scnprintf() internally. Something like:
>
> int fwnode_full_name_to_string(char *buf, size_t size,
> 			       struct fwnode_handle *fwnode)
> {
> 	return scnprintf(buf, size, "%pfwf", fwnode);
> }

That makes sense. I tried your suggestion and it works, thank you!

Best regards,
Remo