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

use std::ops::AddAssign;
use crate::octet::Octet;
use crate::octets::mulassign_scalar;
use crate::octets::fused_addassign_mul_scalar;
use crate::octets::add_assign;

#[derive(Clone, Debug, PartialEq)]
pub struct Symbol {
    value: Vec<u8>
}

impl Symbol {
    pub fn new(value: Vec<u8>) -> Symbol {
        Symbol {
            value
        }
    }

    pub fn zero(size: usize) -> Symbol {
        Symbol {
            value: vec![0; size]
        }
    }

    pub fn len(&self) -> usize {
        self.value.len()
    }

    pub fn bytes(&self) -> &Vec<u8> {
        &self.value
    }

    pub fn mulassign_scalar(&mut self, scalar: &Octet) {
        mulassign_scalar(&mut self.value, scalar);
    }

    pub fn fused_addassign_mul_scalar(&mut self, other: &Symbol, scalar: &Octet) {
        fused_addassign_mul_scalar(&mut self.value, &other.value, scalar);
    }
}

impl<'a> AddAssign<&'a Symbol> for Symbol {
    fn add_assign(&mut self, other: &'a Symbol) {
        add_assign(&mut self.value, &other.value);
    }
}

#[cfg(test)]
mod tests {
    use rand::Rng;

    use crate::symbol::Symbol;

    #[test]
    fn add_assign() {
        let symbol_size = 41;
        let mut data1: Vec<u8> = vec![0; symbol_size];
        let mut data2: Vec<u8> = vec![0; symbol_size];
        let mut result: Vec<u8> = vec![0; symbol_size];
        for i in 0..symbol_size {
            data1[i] = rand::thread_rng().gen();
            data2[i] = rand::thread_rng().gen();
            result[i] = data1[i] ^ data2[i];
        }
        let mut symbol1 = Symbol::new(data1);
        let symbol2 = Symbol::new(data2);

        symbol1 += &symbol2;
        assert_eq!(result, *symbol1.bytes());
    }
}