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#[derive(Debug)]
pub struct Unpacker {
pub out: Vec<u8>,
pub work: u16,
pub work_idx: usize,
}
impl Unpacker {
pub fn new() -> Self {
Self {
out: vec![],
work: 0,
work_idx: 0,
}
}
pub fn push(&mut self, byte: u8) {
self.work = self.work << 8;
self.work |= byte as u16;
self.work_idx += 8;
//println!("[{work_idx}]");
if self.work_idx >= 10 {
let to_front = self.work_idx - 10;
let fronted = self.work >> to_front;
let masked = fronted & 0b000_000_111_11_111_11;
let fixwork = fronted << to_front;
self.out.extend(masked.to_le_bytes());
self.work_idx -= 10;
self.work ^= fixwork;
}
}
pub fn finish(&mut self) {
if self.work_idx > 0 {
let remain = 10 - self.work_idx;
let out = self.work << remain;
self.out.extend(out.to_le_bytes())
}
}
}
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