Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: Apache-2.0 OR MIT
2
3pub(crate) fn skip(mut s: &str) -> &str {
4 'skip: while !s.is_empty() {
5 let byte = s.as_bytes()[0];
6 if byte == b'/' {
7 if s.starts_with("//")
8 && (!s.starts_with("///") || s.starts_with("////"))
9 && !s.starts_with("//!")
10 {
11 if let Some(i) = s.find('\n') {
12 s = &s[i + 1..];
13 continue;
14 } else {
15 return "";
16 }
17 } else if s.starts_with("/**/") {
18 s = &s[4..];
19 continue;
20 } else if s.starts_with("/*")
21 && (!s.starts_with("/**") || s.starts_with("/***"))
22 && !s.starts_with("/*!")
23 {
24 let mut depth = 0;
25 let bytes = s.as_bytes();
26 let mut i = 0;
27 let upper = bytes.len() - 1;
28 while i < upper {
29 if bytes[i] == b'/' && bytes[i + 1] == b'*' {
30 depth += 1;
31 i += 1; // eat '*'
32 } else if bytes[i] == b'*' && bytes[i + 1] == b'/' {
33 depth -= 1;
34 if depth == 0 {
35 s = &s[i + 2..];
36 continue 'skip;
37 }
38 i += 1; // eat '/'
39 }
40 i += 1;
41 }
42 return s;
43 }
44 }
45 match byte {
46 b' ' | 0x09..=0x0D => {
47 s = &s[1..];
48 continue;
49 }
50 b if b <= 0x7F => {}
51 _ => {
52 let ch = s.chars().next().unwrap();
53 if is_whitespace(ch) {
54 s = &s[ch.len_utf8()..];
55 continue;
56 }
57 }
58 }
59 return s;
60 }
61 s
62}
63
64fn is_whitespace(ch: char) -> bool {
65 // Rust treats left-to-right mark and right-to-left mark as whitespace
66 ch.is_whitespace() || ch == '\u{200e}' || ch == '\u{200f}'
67}