Function `be_u16`

fn be_u16<Input, Error>(input: &mut Input) -> Result<u16, Error>
where
    Input: StreamIsPartial + Stream<Token = u8>,
    Error: ParserError<Input>

Recognizes a big endian unsigned 2 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::{error::ErrMode, error::InputError, error::Needed};
# use winnow::prelude::*;
# use winnow::error::Needed::Size;
use winnow::binary::be_u16;

fn parser(s: &mut &[u8]) -> ModalResult<u16> {
    be_u16.parse_next(s)
}

assert_eq!(parser.parse_peek(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0003)));
assert!(parser.parse_peek(&b"\x01"[..]).is_err());

# use winnow::{error::ErrMode, error::InputError, error::Needed};
# use winnow::prelude::*;
# use winnow::Partial;
use winnow::binary::be_u16;

fn parser(s: &mut Partial<&[u8]>) -> ModalResult<u16> {
    be_u16.parse_next(s)
}

assert_eq!(parser.parse_peek(Partial::new(&b"\x00\x01abcd"[..])), Ok((Partial::new(&b"abcd"[..]), 0x0001)));
assert_eq!(parser.parse_peek(Partial::new(&b"\x01"[..])), Err(ErrMode::Incomplete(Needed::new(1))));