setcchar(3) on FreeBSD
The text b95ce972f28e, as FreeBSD 14.1-RELEASE, FreeBSD 14.0-RELEASE, FreeBSD 13.5-RELEASE, FreeBSD 13.4-RELEASE, FreeBSD 13.3-RELEASE, FreeBSD 13.2-RELEASE, FreeBSD 13.1-RELEASE, FreeBSD 13.0-RELEASE shipped it.
Get a wide character string and rendition from a cchar_t or set a cchar_t from a wide-character string