nom::take_until!

macro_rules! take_until(
  ($i:expr, $inp:expr) => (
    {
      #[inline(always)]
      fn as_bytes<T: $crate::AsBytes>(b: &T) -> &[u8] {
        b.as_bytes()
      }

      let expected   = $inp;
      let bytes      = as_bytes(&expected);
      let mut index  = 0;
      let mut parsed = false;

      for idx in 0..$i.len() {
        if idx + bytes.len() > $i.len() {
          index = idx;
          break;
        }
        if &$i[idx..idx+bytes.len()] == bytes {
          parsed = true;
          index  = idx;
          break;
        }
      }

      if index + bytes.len() > $i.len() {
        $crate::IResult::Incomplete($crate::Needed::Size(index + bytes.len()))
      } else {
        if parsed {
          $crate::IResult::Done(&$i[index..], &$i[0..index])
        } else {
          $crate::IResult::Error($crate::Err::Position($crate::ErrorCode::TakeUntil as u32,$i))
        }
      }
    }
  );
);

take_until!(tag) => &[T] -> IResult<&[T], &[T]>