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

import_stdlib!();

pub fn flanked(s: &str, left: &str, right: &str) -> String {
    left.to_owned() + s + right
}

pub fn is_printable(c: char) -> bool {
    !c.is_ascii() || (32..=126).contains(&(c as u32))
}

pub fn sanitized(string: &str) -> Option<String> {
    let mut has_printable = false;
    let chars: Vec<_> = string.chars().map(|c| {
        if is_printable(c) {
            has_printable = true;
            c
        } else {
            '.'
        }
    }).collect();
    if !has_printable {
        None
    } else {
        Some(chars.into_iter().collect())
    }
}