vendor/sysinfo/src/apple/utils.rs

   1 // Take a look at the license at the top of the repository in the LICENSE file.
   2
   3 use libc::c_char;
   4
   5 pub(crate) fn cstr_to_rust(c: *const c_char) -> Option<String> {
   6     cstr_to_rust_with_size(c, None)
   7 }
   8
   9 pub(crate) fn cstr_to_rust_with_size(c: *const c_char, size: Option<usize>) -> Option<String> {
  10     if c.is_null() {
  11         return None;
  12     }
  13     let mut s = match size {
  14         Some(len) => Vec::with_capacity(len),
  15         None => Vec::new(),
  16     };
  17     let mut i = 0;
  18     unsafe {
  19         loop {
  20             let value = *c.offset(i) as u8;
  21             if value == 0 {
  22                 break;
  23             }
  24             s.push(value);
  25             i += 1;
  26         }
  27         String::from_utf8(s).ok()
  28     }
  29 }
  30
  31 #[cfg(target_os = "macos")]
  32 pub(crate) fn vec_to_rust(buf: Vec<i8>) -> Option<String> {
  33     String::from_utf8(
  34         buf.into_iter()
  35             .flat_map(|b| if b > 0 { Some(b as u8) } else { None })
  36             .collect(),
  37     )
  38     .ok()
  39 }