mchar_map_charset(3m17n) on Linux
The text 9a05a064b4a3, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
Call a function for all the characters in a specified charset.