nrot

Function rot_letter

Source 
pub fn rot_letter(mode: Mode, letter: u8, rotation: u8) -> u8
Expand description

Transform single letter to ROT

The letter after rotated/shifted by n from its initial value

use nrot::{rot_letter, Mode};
let rotation = 13;

let input = b'a';
let result = b'n';
let encrypted = rot_letter(Mode::Encrypt, input, rotation);
assert_eq!(result, encrypted);
let input = b'n';
let result = b'a';
let encrypted = rot_letter(Mode::Decrypt, input, rotation);
assert_eq!(result, encrypted);
Examples found in repository?
examples/nrot.rs (line 10)
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fn encrypt(input: String) {
    let rotation = 13;

    let input_length = input.len();
    let input_bytes = input.as_bytes();

    if input_length == 1 {
        let byte_result = rot_letter(Mode::Encrypt, input_bytes[0], rotation);
        println!("{}", String::from_utf8_lossy(&[byte_result]))
    } else {
        let bytes_result = rot(Mode::Encrypt, input_bytes, rotation);
        println!("{}", String::from_utf8_lossy(&bytes_result))
    };
}

fn decrypt(input: String) {
    let rotation = 13;

    let input_length = input.len();
    let input_bytes = input.as_bytes();

    if input_length == 1 {
        let byte_result = rot_letter(Mode::Decrypt, input_bytes[0], rotation);
        println!("{}", String::from_utf8_lossy(&[byte_result]))
    } else {
        let bytes_result = rot(Mode::Decrypt, input_bytes, rotation);
        println!("{}", String::from_utf8_lossy(&bytes_result))
    };
}