XmStringParseText(3) on Linux
The text e8bc0485d92e, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A function that converts a character string to a compound string "XmStringParseText" "compound string functions" "XmStringParseText"