I'm not an expert on this, but doing a little digging I see some links on
calculating utf-8 character sizes and it seems like a lookup table is not
necessary:

http://www.daemonology.net/blog/2008-06-05-faster-utf8-strlen.html

"by looking at the first byte of a multibyte character, we can determine
the length of the character: If the first byte is between 0xC0 and 0xDF,
the UTF-8 character has two bytes; if it is between 0xE0 and 0xEF, the
UTF-8 character has 3 bytes; and if it is 0xF0 and 0xFF, the UTF-8
character has 4 bytes."

On Sat, Jan 27, 2018 at 11:54 PM, Danilo Kordic <danilo.kor...@gmail.com>
wrote:
>
>   GNU Emacs can be used as a line editor.  Execute elisp expression
> ``(term "/absolute/path/to/pil")'' then activate `term-line-mode' with
> ``C-C C-j''.
>
>   Is this of any help?  How much does it count :) ?
>
> --
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