Function parse_headers

src/email.rs:756–787

(literal: &[u8])

}

fn parse_headers(literal: &[u8]) -> BTreeMap<String, String> {
    let mut headers: BTreeMap<String, String> = BTreeMap::new();
    let text = String::from_utf8_lossy(literal);
    let mut current_key: Option<String> = None;

    for raw_line in text.lines() {
        let line = raw_line.trim_end_matches('\r');
        if line.is_empty() {
            break;
        }

        if line.starts_with(' ') || line.starts_with('\t') {
            if let Some(key) = current_key.as_deref()
                && let Some(value) = headers.get_mut(key)
            {
                value.push(' ');
                value.push_str(line.trim());
            }
            continue;
        }

        let Some((name, value)) = line.split_once(':') else {
            continue;
        };

        let key = name.trim().to_ascii_lowercase();
        headers.insert(key.clone(), value.trim().to_string());
        current_key = Some(key);
    }

    headers
}

fn split_headers_and_body(raw: &[u8]) -> (BTreeMap<String, String>, &[u8]) {
    if let Some(index) = find_subsequence(raw, b"\r\n\r\n") {