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
fn v1(word: &str) -> u32 {
let word = &word.to_lowercase();
let it = &mut word.chars();
let c1 = it.next().unwrap() as u32;
return (c1 & 0x7f) << 21;
}
fn v2(word: &str) -> u32 {
let word = &word.to_lowercase();
let it = &mut word.chars();
let c1 = it.next().unwrap() as u32;
let c2 = it.next().unwrap() as u32;
return ((c1 & 0x7f) << 21) + ((c2 & 0x7f) << 14);
}
fn v3(word: &str) -> u32 {
let word = &word.to_lowercase();
let it = &mut word.chars();
let c1 = it.next().unwrap() as u32;
let c2 = it.next().unwrap() as u32;
let c3 = it.next().unwrap() as u32;
return ((c1 & 0x7f) << 21) + ((c2 & 0x7f) << 14) + ((c3 & 0x7f) << 7);
}
fn v4(word: &str) -> u32 {
let word = &word.to_lowercase();
let it = &mut word.chars();
let c1 = it.next().unwrap() as u32;
let c2 = it.next().unwrap() as u32;
let c3 = it.next().unwrap() as u32;
let c4 = it.next().unwrap() as u32;
return ((c1 & 0x7f) << 21) + ((c2 & 0x7f) << 14) + ((c3 & 0x7f) << 7) + (c4 & 0x7f);
}
pub fn str_value(word: &str) -> u32 {
let len = word.len();
match len {
n if n >= 8 => { (v4(&word[..4]) << 2) + v4(&word[len - 4..]) }
7 => { (v4(&word[..4]) << 2) + v3(&word[4..]) }
6 => { (v4(&word[..4]) << 2) + v2(&word[4..]) }
5 => { (v4(&word[..4]) << 2) + v1(&word[4..]) }
4 => { v4(word) << 2 }
3 => { v3(word) << 2 }
2 => { v2(word) << 2 }
1 => { v1(word) << 2 }
_ => { 0 }
}
}
#[cfg(test)]
mod tests {
use veho::vector::iterate;
use super::*;
#[test]
fn test() {
let texts = [
"Warren",
"WSJ",
"GlobalTimes",
"ZZZZ",
"zzzz",
"MetalGear 1",
"MetalGear 2",
"123",
"abc",
"---",
];
iterate(&texts, |word| {
println!("{}: {}", word, str_value(word))
})
}
}