fixed_buffer/
deframe_crlf.rs

1use super::MalformedInputError;
2
3/// Deframes lines that are terminated by `b"\r\n"`.
4/// Ignores solitary `b'\n'`.
5///
6/// See [`read_frame`](struct.FixedBuf.html#method.read_frame).
7///
8/// # Errors
9/// Returns an error when `data` does not contain `b"\r\n"`.
10pub fn deframe_crlf(
11    data: &[u8],
12) -> Result<(usize, Option<core::ops::Range<usize>>), MalformedInputError> {
13    if data.len() > 1 {
14        for n in 1..data.len() {
15            if data[n - 1] == b'\r' && data[n] == b'\n' {
16                let payload_range = 0..(n - 1);
17                let frame_len = n + 1;
18                return Ok((frame_len, Some(payload_range)));
19            }
20        }
21    }
22    Ok((0, None))
23}