nanvm_lib/parser/
path.rs

1use crate::common::default::default;
2
3pub fn normalize(path: &str) -> String {
4    let path_split: Vec<_> = path.split('/').collect();
5    let mut result_split: Vec<&str> = Vec::new();
6    for &dir in path_split.iter() {
7        match dir {
8            "" => {}
9            ".." => {
10                let last = result_split.last();
11                match last {
12                    Some(x) if x != &".." => {
13                        result_split.pop();
14                    }
15                    _ => {
16                        result_split.push(dir);
17                    }
18                }
19            }
20            _ => {
21                result_split.push(dir);
22            }
23        }
24    }
25    result_split.join("/")
26}
27
28pub fn concat(a: &str, b: &str) -> String {
29    let mut concat = a.to_string();
30    concat.push('/');
31    concat.push_str(b);
32    normalize(&concat)
33}
34
35pub fn split(path: &str) -> (&str, &str) {
36    match path.rsplit_once('/') {
37        None => (default(), path),
38        Some(t) => t,
39    }
40}
41
42#[cfg(test)]
43mod test {
44    use wasm_bindgen_test::wasm_bindgen_test;
45
46    use crate::parser::path::{concat, normalize};
47
48    #[test]
49    #[wasm_bindgen_test]
50    fn test_norm() {
51        let norm = normalize("../../dir/file.json");
52        assert_eq!(norm, "../../dir/file.json");
53
54        let norm = normalize("../../dir/../file.json");
55        assert_eq!(norm, "../../file.json");
56    }
57
58    #[test]
59    #[wasm_bindgen_test]
60    fn test_concat() {
61        let result = concat("a", "b");
62        assert_eq!(result, "a/b");
63
64        let result = concat("a///b/", "c");
65        assert_eq!(result, "a/b/c");
66
67        let result = concat("a/../b/..", "c");
68        assert_eq!(result, "c");
69    }
70}
nanvm_lib/parser/path.rs

nanvm_lib/parser/
path.rs
