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
#![allow(dead_code)]
pub fn memchr(n1: u8, haystack: &[u8]) -> Option<usize> {
haystack.iter().position(|&b| b == n1)
}
pub fn memchr2(n1: u8, n2: u8, haystack: &[u8]) -> Option<usize> {
haystack.iter().position(|&b| b == n1 || b == n2)
}
pub fn memchr3(n1: u8, n2: u8, n3: u8, haystack: &[u8]) -> Option<usize> {
haystack.iter().position(|&b| b == n1 || b == n2 || b == n3)
}
pub fn memrchr(n1: u8, haystack: &[u8]) -> Option<usize> {
haystack.iter().rposition(|&b| b == n1)
}
pub fn memrchr2(n1: u8, n2: u8, haystack: &[u8]) -> Option<usize> {
haystack.iter().rposition(|&b| b == n1 || b == n2)
}
pub fn memrchr3(n1: u8, n2: u8, n3: u8, haystack: &[u8]) -> Option<usize> {
haystack.iter().rposition(|&b| b == n1 || b == n2 || b == n3)
}