pub fn be_u32<I, E: ParseError<I>>(input: I) -> IResult<I, u32, E>where
I: StreamIsPartial + Stream<Token = u8>,
<I as Stream>::Slice: AsBytes,
Expand description
Recognizes a big endian unsigned 4 bytes integer.
Complete version: Returns an error if there is not enough input data.
Partial version: Will return Err(winnow::error::ErrMode::Incomplete(_))
if there is not enough data.
Example
use winnow::number::be_u32;
let parser = |s| {
be_u32(s)
};
assert_eq!(parser(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00030507)));
assert_eq!(parser(&b"\x01"[..]), Err(ErrMode::Backtrack(Error::new(&[0x01][..], ErrorKind::Eof))));
use winnow::number::be_u32;
let parser = |s| {
be_u32::<_, Error<_>>(s)
};
assert_eq!(parser(Partial::new(&b"\x00\x01\x02\x03abcd"[..])), Ok((Partial::new(&b"abcd"[..]), 0x00010203)));
assert_eq!(parser(Partial::new(&b"\x01"[..])), Err(ErrMode::Incomplete(Needed::new(3))));