pub fn get_hex(prefix_len: u32, data: Vec<u8>) -> String {
  let mut header_begin = prefix_len >> 4;
  let mut counter = prefix_len % 16;
  // println!("{}", header_begin);
  // println!("{}", counter);
  let mut ret = String::new();

  for i in data {
    if counter % 16 == 0 {
      counter = 0;
      // if header_begin != 0 {
      //   ret.push('\n');
      // }
      header_begin += 1;
      ret += &format!("{:04x}\t", header_begin - 1);
    }
    counter += 1;
    ret = ret + &*format!("{:02x} ", i);
    if counter % 16 ==0 {
      ret.push('\n');
    }
  }
  return ret;
}

pub fn get_ascii(prefix_len: u32, data: Vec<u8>) -> String {
  let mut header_begin = prefix_len >> 4;
  let mut counter = prefix_len % 16;
  // println!("{}", header_begin);
  // println!("{}", counter);
  let mut ret = String::new();

  for i in data {
    if counter % 16 == 0 {
      counter = 0;
      // if header_begin != 0 { ret.push('\n'); }
      header_begin += 1;
      ret += &format!("{:04x}\t", header_begin - 1);
    }
    counter += 1;

    if i.is_ascii_alphanumeric()  || i.is_ascii_punctuation() || i.is_ascii_graphic() {
      // ret += &*(i as char).to_string();
      ret.push(char::from(i));
      // basic_show.push(i as char);
    } else {
      ret += ".";
    }

    if counter % 16 ==0 {
      ret.push('\n');
    }
  }
  return ret;
}

#[cfg(test)]
mod tests {
  use crate::hexdump::get_hex;

  #[test]
  fn exploration() {
    let data = vec![10, 20, 203];
    let tmp = get_hex(14, data);
    println!("{}", tmp);
    // assert_eq!(2 + 2, 4);
  }
}