bfy/src/utils.rs

pub(crate) fn read_brainfuck_code_if_any(source: &Option<String>) -> Option<String> {
    match source {
        Some(source) => {
            info!("Reading brainfuck source code from file: {}", source);
            match std::fs::read_to_string(source) {
                Ok(source) => Some(clean(source)),
                Err(e) => {
                    error!("Failed to read source code file: {}", e);
                    eprintln!("Failed to read source code file: {}", e);
                    std::process::exit(1);
                }
            }
        }
        None => None,
    }
}

fn clean(source: String) -> String {
    source
        .chars()
        .filter(|c| match c {
            '+' | '-' | '<' | '>' | '[' | ']' | '.' | ',' => true,
            _ => false,
        })
        .collect()
}