Function rlecode_hqx

crates/stdlib/src/binascii.rs:680–712

(s: ArgAsciiBuffer)

    #[pyfunction]
    fn rlecode_hqx(s: ArgAsciiBuffer) -> PyResult<Vec<u8>> {
        const RUN_CHAR: u8 = 0x90; // b'\x90'
        s.with_ref(|buffer| {
            let len = buffer.len();
            let mut out_data = Vec::<u8>::with_capacity((len * 2) + 2);

            let mut idx = 0;
            while idx < len {
                let ch = buffer[idx];

                if ch == RUN_CHAR {
                    out_data.push(RUN_CHAR);
                    out_data.push(0);
                    return Ok(out_data);
                } else {
                    let mut in_end = idx + 1;
                    while in_end < len && buffer[in_end] == ch && in_end < idx + 255 {
                        in_end += 1;
                    }
                    if in_end - idx > 3 {
                        out_data.push(ch);
                        out_data.push(RUN_CHAR);
                        out_data.push(((in_end - idx) % 256) as u8);
                        idx = in_end - 1;
                    } else {
                        out_data.push(ch);
                    }
                }
                idx += 1;
            }
            Ok(out_data)
        })
    }

    #[pyfunction]
    fn rledecode_hqx(s: ArgAsciiBuffer) -> PyResult<Vec<u8>> {