More Sophisticated Lower Case function

[said]

Interesting topic, thank you

@ wilbert, your code with flat PB is very nice, you asm is a killer! Thank you for sharing

[wilbert]

@ wilbert, your code with flat PB is very nice, you asm is a killer!

Thanks
My own favorite is the full unicode version.
Since it supports the full unicode range, it allows you for example to map a unicode character like '♫' with a character you can input easily like '%'.
But it is also convenient to create a custom upper- or lowercase function for languages requiring unicode characters.