Function core_foundation_sys::string::CFStringGetBytes

pub unsafe extern fn CFStringGetBytes(theString: CFStringRef,
                                      range: CFRange,
                                      encoding: CFStringEncoding,
                                      lossByte: u8,
                                      isExternalRepresentation: Boolean,
                                      buffer: *mut u8,
                                      maxBufLen: CFIndex,
                                      usedBufLen: *mut CFIndex)
                                      -> CFIndex