rust/library/alloc/tests/c_str.rs
2022-04-14 21:53:11 +03:00

19 lines
588 B
Rust

use std::borrow::Cow::{Borrowed, Owned};
use std::ffi::{c_char, CStr};
#[test]
fn to_str() {
let data = b"123\xE2\x80\xA6\0";
let ptr = data.as_ptr() as *const c_char;
unsafe {
assert_eq!(CStr::from_ptr(ptr).to_str(), Ok("123…"));
assert_eq!(CStr::from_ptr(ptr).to_string_lossy(), Borrowed("123…"));
}
let data = b"123\xE2\0";
let ptr = data.as_ptr() as *const c_char;
unsafe {
assert!(CStr::from_ptr(ptr).to_str().is_err());
assert_eq!(CStr::from_ptr(ptr).to_string_lossy(), Owned::<str>(format!("123\u{FFFD}")));
}
}