Function compare_c_str 

pub fn compare_c_str<A: AsRef<CStr>, B: AsRef<CStr>>(a: A, b: B) -> Ordering

Available on crate feature std only.

Compare two CStr.

The alphanumeric algorithm is used only when both values can be converted to UTF-8 with CStr::to_str. If either value cannot be converted, this falls back to the native CStr ordering.