You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mod.rs
    path of file: ./repos/UnicornConsole/unicorn/src/cartridge
    
    the code of the file until where you have to start completion: mod code;
mod gff;
mod gfx;
mod sfx;
mod map;
mod music;
mod palette;
mod utils;

use log::{debug
    
fn read_from_p8format<R: io::BufRead>(filename: &str, buf: &mut R) -> Result<Cartridge, Error> {
    info!("[CARTRIDGE] [read_from_p8format] Starting to parse the Pico8 P8");

    let mut header = String::new();
    buf.read_line(&mut header)?;

    let mut version = String::new();
    buf.read_line(&mut version)?;

    let re_delim_section = Regex::new(SECTION_DELIM_RE).unwrap();

    let mut sections: HashMap<String, Vec<String>> = HashMap::new();

    let mut section_name = "".to_string();

    let mut new_section;

    for line in buf.lines() {
        let l = line.unwrap();
        if re_delim_section.is_match(l.as_str()) {
            debug!("[CARTRIDGE] [Cartridge] NEW SECTION {:?}", l);
            section_name = l.clone();

            let vec_section = Vec::new();
            sections.insert(section_name.clone(), vec_section);
            new_section = false;
        } else {
            new_section = true;
        }

        if new_section {
            match sections.get_mut(&section_name) {
                Some(vec_section2) => vec_section2.push(l),
                _ => debug!("Impossible to find section {:?}", section_name),
            }
        }
    }

    for (section_name, section) in &sections {
        debug!("{}: \"{}\"", section_name, section.len());
    }

    let cartridge_gfx;
    let cartridge_code;
    let cartridge_map;
    let cartridge_gff;
    let cartridge_music;
    let cartridge_sfx;


    if sections.contains_key("__lua__") {
        cartridge_code = CartridgeCode::new("lua".to_string(),
                                            sections.get_mut("__lua__").unwrap());
    } else {
        return Err(Error::Err("NO CODE DATA".to_string()));
    }

    match sections.get_mut("__gfx__") {
        Some(vec_section) => cartridge_gfx = CartridgeGFX::new(vec_section),
        _ => cartridge_gfx = CartridgeGFX::empty(),
    }

    match sections.get_mut("__map__") {
        Some(vec_section) => cartridge_map = CartridgeMap::new(vec_section, DEFAULT_MAP_WIDTH as u32, DEFAULT_MAP_HEIGHT as u32),
        _ => cartridge_map = CartridgeMap::empty(),
    }

    match sections.get_mut("__gff__") {
        Some(vec_section) => cartridge_gff = CartridgeGFF::new(vec_section),
        _ => cartridge_gff = CartridgeGFF::empty(),
    }

    match sections.get_mut("__music__") { 
        Some(vec_section) => cartridge_music = CartridgeMusic::new(vec_section),
        _ => cartridge_music = CartridgeMusic::empty(),
    }

    match sections.get_mut("__sfx__") {
        Some(vec_section) => cartridge_sfx = CartridgeSFX::new(vec_section),
        _ => cartridge_sfx = CartridgeSFX::empty(),
    }


    Ok(Cartridge {
           filename: filename.to_string(),
           data_filename: "".to_string(),
           header: header.clone(),
           version: version.clone(),
           gfx: cartridge_gfx,
           code: cartridge_code,
           map: cartridge_map,
           gff: cartridge_gff,
           palette: CartridgePalette::empty(),
           music: cartridge_music,
           sfx: cartridge_sfx,
           format: CartridgeFormat::Pico8P8Format,
           mode_height: DEFAULT_MODE_HEIGHT,
           mode_width: DEFAULT_MODE_WIDTH,
       })
}