Function winnow::binary::le_u64

source · 
pub fn le_u64<Input, Error>(input: &mut Input) -> PResult<u64, Error>
where
    Input: StreamIsPartial + Stream<Token = u8>,
    Error: ParserError<Input>,
Expand description

Recognizes a little endian unsigned 8 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::binary::le_u64;

fn parser(s: &[u8]) -> IResult<&[u8], u64> {
      le_u64.parse_peek(s)
}

assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x0706050403020100)));
assert_eq!(parser(&b"\x01"[..]), Err(ErrMode::Backtrack(InputError::new(&[0x01][..], ErrorKind::Slice))));
use winnow::binary::le_u64;

fn parser(s: Partial<&[u8]>) -> IResult<Partial<&[u8]>, u64> {
      le_u64::<_, InputError<_>>.parse_peek(s)
}

assert_eq!(parser(Partial::new(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcd"[..])), Ok((Partial::new(&b"abcd"[..]), 0x0706050403020100)));
assert_eq!(parser(Partial::new(&b"\x01"[..])), Err(ErrMode::Incomplete(Needed::new(7))));