1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

/// Shifts a byte to the right and returns both the shifted byte and the bits that carried.
pub const fn shr_carry(input: u8, rotation: u8) -> (u8, u8) {
    let c_mod = rotation & 0x7;
    if c_mod != 0 {
        let res = input >> c_mod;
        let carry = (input << (8 - c_mod)) >> (8 - c_mod);
        (res, carry)
    } else {
        (input, 0u8)
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    /// Tests the `shr_carry` function.
    #[test]
    fn test_shr_carry() {
        println!("{:?}", shr_carry(0, 2));
    }
}