Function capture_quoted_token

src/email.rs:691–716

(line: &str, key: &str)

}

fn capture_quoted_token(line: &str, key: &str) -> Option<String> {
    let marker = format!("{key} ");
    let start = line.find(&marker)? + marker.len();
    let rest = line[start..].trim_start();
    let mut chars = rest.chars();
    if chars.next()? != '"' {
        return None;
    }

    let mut value = String::new();
    let mut escaped = false;
    for ch in chars {
        if escaped {
            value.push(ch);
            escaped = false;
            continue;
        }
        match ch {
            '\\' => escaped = true,
            '"' => return Some(value),
            _ => value.push(ch),
        }
    }

    None
}

fn capture_parenthesized_token(line: &str, key: &str) -> Option<String> {
    let marker = format!("{key} ");