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//! Null-separated path-list parsing helpers.
use std::{ffi::OsStr, os::unix::ffi::OsStrExt, path::Path};
/// Parses a NUL-separated path list into borrowed paths.
///
/// Empty segments are ignored. Returned paths borrow from `bytes`.
pub fn paths_from_null_separated_bytes(bytes: &[u8]) -> Vec<&Path> {
bytes
.split(|byte| *byte == 0)
.filter(|segment| !segment.is_empty())
.map(|segment| Path::new(OsStr::from_bytes(segment)))
.collect()
}
#[cfg(test)]
mod tests {
use std::path::Path;
use super::paths_from_null_separated_bytes;
#[test]
fn paths_from_null_separated_bytes_returns_empty_list_for_empty_input() {
let paths = paths_from_null_separated_bytes(b"");
assert!(paths.is_empty());
}
#[test]
fn paths_from_null_separated_bytes_ignores_empty_segments() {
let paths = paths_from_null_separated_bytes(b"\0a.rs\0\0b.rs\0");
assert_eq!(paths, vec![Path::new("a.rs"), Path::new("b.rs")]);
}
#[test]
fn paths_from_null_separated_bytes_accepts_final_path_without_trailing_nul() {
let paths = paths_from_null_separated_bytes(b"a.rs\0b.rs");
assert_eq!(paths, vec![Path::new("a.rs"), Path::new("b.rs")]);
}
#[test]
fn paths_from_null_separated_bytes_preserves_order() {
let paths = paths_from_null_separated_bytes(b"b.rs\0a.rs\0c.rs\0");
assert_eq!(
paths,
vec![Path::new("b.rs"), Path::new("a.rs"), Path::new("c.rs")]
);
}
}
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