Messages in this thread | | | Subject | Re: [PATCH 3/4] auxdisplay: charlcd: fix x/y address commands | From | Robert Abel <> | Date | Mon, 26 Feb 2018 23:43:36 +0100 |
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On 26 Feb 2018 17:49, Miguel Ojeda wrote: > On a general note, the code seems a bit convoluted for what it does, > specially without the comment written in the commit message :-) Isn't > it simpler to use a tiny array in the stack and put the numbers to be > converted instead of modifying the input sequence and dancing with > pointers?
That's what I felt at first, too. If we can drop the backwards compatibility of repeated xy commands, the whole affair gets much easier, but will unfortunately break existing use.
Ex. ^[[Lx004y002x006; --> x6y2, because repeats of x would just overwrite earlier values. That's what the while loop allowed in the first place.
I suspect the while loop to parse was just a clever way of parsing y followed by x and x followed by y using the same code and the overwriting behavior is actually an unaccounted-for side-effect.
Regards,
Robert
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