4 use smallvec::SmallVec;
9 const SIZE: usize = 36;
11 /// Like SmallVec but for C strings.
13 pub struct SmallCStr {
14 data: SmallVec<[u8; SIZE]>,
19 pub fn new(s: &str) -> SmallCStr {
22 let data = if len < SIZE {
23 let mut buf = [0; SIZE];
24 buf[..len].copy_from_slice(s.as_bytes());
25 SmallVec::from_buf_and_len(buf, len1)
27 let mut data = Vec::with_capacity(len1);
28 data.extend_from_slice(s.as_bytes());
30 SmallVec::from_vec(data)
32 if let Err(e) = ffi::CStr::from_bytes_with_nul(&data) {
33 panic!("The string \"{}\" cannot be converted into a CStr: {}", s, e);
39 pub fn new_with_nul(s: &str) -> SmallCStr {
41 if let Err(e) = ffi::CStr::from_bytes_with_nul(b) {
42 panic!("The string \"{}\" cannot be converted into a CStr: {}", s, e);
44 SmallCStr { data: SmallVec::from_slice(s.as_bytes()) }
49 pub fn as_c_str(&self) -> &ffi::CStr {
51 ffi::CStr::from_bytes_with_nul_unchecked(&self.data[..])
56 pub fn len_with_nul(&self) -> usize {
60 pub fn spilled(&self) -> bool {
65 impl Deref for SmallCStr {
66 type Target = ffi::CStr;
68 fn deref(&self) -> &ffi::CStr {