Function silicera_variant_select 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn silicera_variant_select(
    profile: *mut SiliceraProfile,
    size_bytes: c_ulonglong,
    buf: *mut c_char,
    buf_len: usize,
) -> c_int

Select a variant name for size_bytes into buf (NUL-terminated).

Writes at most buf_len bytes including the trailing NUL.

Safety

profile must be a handle from silicera_profile_load (or null → -1). buf must point to a writable buffer of buf_len bytes when buf_len > 0.