#[cfg(feature = "debug-trace")]
macro_rules! trace {
    ($($arg:tt)*) => {
        eprintln!("[TRACE] {}", format!($($arg)*));
    };
}

#[cfg(not(feature = "debug-trace"))]
macro_rules! trace {
    ($($arg:tt)*) => {};
}

pub(crate) use trace;

#[allow(dead_code)]
pub fn hex_preview(data: &[u8], len: usize) -> String {
    let preview: Vec<String> = data
        .iter()
        .take(len)
        .map(|b| format!("{:02x}", b))
        .collect();
    if data.len() > len {
        format!("{}... ({} bytes)", preview.join(""), data.len())
    } else {
        preview.join("")
    }
}