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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
pub trait StartsWithIgnoreAsciiCase {
fn starts_with_ignore_ascii_case<S: AsRef<[u8]>>(&self, b: S) -> bool;
fn starts_with_ignore_ascii_case_with_lowercase<S: AsRef<[u8]>>(&self, b: S) -> bool;
fn starts_with_ignore_ascii_case_with_uppercase<S: AsRef<[u8]>>(&self, b: S) -> bool;
}
impl<T: AsRef<[u8]>> StartsWithIgnoreAsciiCase for T {
#[inline]
fn starts_with_ignore_ascii_case<S: AsRef<[u8]>>(&self, b: S) -> bool {
let b = b.as_ref();
let b_length = b.len();
if b_length == 0 {
return true;
}
let a = self.as_ref();
let a_length = a.len();
if a_length >= b_length {
unsafe { a.get_unchecked(..b_length) }.eq_ignore_ascii_case(b)
} else {
false
}
}
#[inline]
fn starts_with_ignore_ascii_case_with_lowercase<S: AsRef<[u8]>>(&self, b: S) -> bool {
let b = b.as_ref();
debug_assert!(!b.iter().any(|e| e.is_ascii_uppercase()));
let b_length = b.len();
if b_length == 0 {
return true;
}
let a = self.as_ref();
let a_length = a.len();
if a_length >= b_length {
!unsafe { a.get_unchecked(..b_length) }
.iter()
.map(|e| e.to_ascii_lowercase())
.zip(b.iter().copied())
.any(|(ac, bc)| ac != bc)
} else {
false
}
}
#[inline]
fn starts_with_ignore_ascii_case_with_uppercase<S: AsRef<[u8]>>(&self, b: S) -> bool {
let b = b.as_ref();
debug_assert!(!b.iter().any(|e| e.is_ascii_lowercase()));
let b_length = b.len();
if b_length == 0 {
return true;
}
let a = self.as_ref();
let a_length = a.len();
if a_length >= b_length {
!unsafe { a.get_unchecked(..b_length) }
.iter()
.map(|e| e.to_ascii_uppercase())
.zip(b.iter().copied())
.any(|(ac, bc)| ac != bc)
} else {
false
}
}
}