| pub fn discard_exact(avail: usize, len: usize) -> Result<usize, u8> { | |
| let mut avail = avail; | |
| let mut len = len; | |
| let mut rounds = 0usize; | |
| let mut eof = false; | |
| while len > 0 && !eof { | |
| let consume_len = if avail < len { avail } else { len }; | |
| if consume_len == 0 { | |
| eof = true; | |
| } else { | |
| avail -= consume_len; | |
| len -= consume_len; | |
| rounds += 1; | |
| } | |
| } | |
| if eof { Err(1) } else { Ok(rounds) } | |
| } | |