Function sioul_colour_profile_name 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn sioul_colour_profile_name(
    profile: *const u8,
    length: usize,
    out: *mut u8,
    capacity: usize,
) -> usize

The profile’s name, written to out as UTF-8 with a final zero, cut to capacity; returns its length in bytes without the zero (0: no name).

Safety

profile holds length bytes; out has room for capacity bytes.