rustfs-erasure-codec 7.0.1

Rust implementation of Reed-Solomon erasure coding
Documentation 
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

pub(crate) fn mul_slice_pure_rust(c: u8, input: &[u8], out: &mut [u8]) {
    if c == 0 {
        out.fill(0);
        return;
    }
    if c == 1 {
        out.copy_from_slice(input);
        return;
    }
    let mt = &super::MUL_TABLE[c as usize];
    assert_eq!(input.len(), out.len());
    for (i, o) in input.iter().zip(out.iter_mut()) {
        *o = mt[*i as usize];
    }
}

pub(crate) fn mul_slice_xor_pure_rust(c: u8, input: &[u8], out: &mut [u8]) {
    if c == 0 {
        return;
    }
    if c == 1 {
        assert_eq!(input.len(), out.len());
        for (i, o) in input.iter().zip(out.iter_mut()) {
            *o ^= *i;
        }
        return;
    }
    let mt = &super::MUL_TABLE[c as usize];
    assert_eq!(input.len(), out.len());
    for (i, o) in input.iter().zip(out.iter_mut()) {
        *o ^= mt[*i as usize];
    }
}

#[cfg(test)]
pub(crate) fn slice_xor(input: &[u8], out: &mut [u8]) {
    assert_eq!(input.len(), out.len());
    for (i, o) in input.iter().zip(out.iter_mut()) {
        *o ^= *i;
    }
}