Function winnow::binary::be_f64

pub fn be_f64<I, E: ParserError<I>>(input: &mut I) -> PResult<f64, E>
where
    I: StreamIsPartial + Stream<Token = u8>,
    <I as Stream>::Slice: AsBytes,

Recognizes a big endian 8 bytes floating point number.

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::be_f64;

fn parser(s: &[u8]) -> IResult<&[u8], f64> {
      be_f64.parse_peek(s)
}

assert_eq!(parser(&[0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 12.5)));
assert_eq!(parser(&b"abc"[..]), Err(ErrMode::Backtrack(InputError::new(&b"abc"[..], ErrorKind::Slice))));

use winnow::binary::be_f64;

fn parser(s: Partial<&[u8]>) -> IResult<Partial<&[u8]>, f64> {
      be_f64::<_, InputError<_>>.parse_peek(s)
}

assert_eq!(parser(Partial::new(&[0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..])), Ok((Partial::new(&b""[..]), 12.5)));
assert_eq!(parser(Partial::new(&[0x01][..])), Err(ErrMode::Incomplete(Needed::new(7))));