Function winnow::binary::be_u32

pub fn be_u32<Input, Error>(input: &mut Input) -> PResult<u32, Error>
where
    Input: StreamIsPartial + Stream<Token = u8>,
    <Input as Stream>::Slice: AsBytes,
    Error: ParserError<Input>,

Recognizes a big endian unsigned 4 bytes integer.

Complete version: Returns an error if there is not enough input data.

[Partial version][crate::_topic::partial]: Will return Err(winnow::error::ErrMode::Incomplete(_)) if there is not enough data.

Example

use winnow::binary::be_u32;

fn parser(s: &[u8]) -> IResult<&[u8], u32> {
    be_u32.parse_peek(s)
}

assert_eq!(parser(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00030507)));
assert_eq!(parser(&b"\x01"[..]), Err(ErrMode::Backtrack(InputError::new(&[0x01][..], ErrorKind::Slice))));

use winnow::binary::be_u32;

fn parser(s: Partial<&[u8]>) -> IResult<Partial<&[u8]>, u32> {
    be_u32.parse_peek(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))));