blob: 368cf77c56584f485eb07dfaa3a8ffa9ad108502 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
use bstr::ByteSlice;
use crate::{pattern, pattern::Mode};
#[inline]
/// A sloppy parser that performs only the most basic checks, providing additional information
/// using `pattern::Mode` flags.
///
/// If `may_alter` is `false`, we won't parse leading `!` or its escaped form.
///
/// Returns `(pattern, mode, no_wildcard_len)`
pub fn pattern(mut pat: &[u8], may_alter: bool) -> Option<(&[u8], pattern::Mode, Option<usize>)> {
let mut mode = Mode::empty();
if pat.is_empty() {
return None;
};
if may_alter {
if pat.first() == Some(&b'!') {
mode |= Mode::NEGATIVE;
pat = &pat[1..];
} else if pat.first() == Some(&b'\\') {
let second = pat.get(1);
if second == Some(&b'!') || second == Some(&b'#') {
pat = &pat[1..];
}
}
}
if pat.iter().all(u8::is_ascii_whitespace) {
return None;
}
if pat.first() == Some(&b'/') {
mode |= Mode::ABSOLUTE;
pat = &pat[1..];
}
if pat.last() == Some(&b'/') {
mode |= Mode::MUST_BE_DIR;
pat = &pat[..pat.len() - 1];
}
if !pat.contains(&b'/') {
mode |= Mode::NO_SUB_DIR;
}
if pat.first() == Some(&b'*') && first_wildcard_pos(&pat[1..]).is_none() {
mode |= Mode::ENDS_WITH;
}
let pos_of_first_wildcard = first_wildcard_pos(pat);
Some((pat, mode, pos_of_first_wildcard))
}
fn first_wildcard_pos(pat: &[u8]) -> Option<usize> {
pat.find_byteset(GLOB_CHARACTERS)
}
pub(crate) const GLOB_CHARACTERS: &[u8] = br"*?[\";
|
