Function u16

pub fn u16<I, E>(endian: Endianness) -> impl Parser<I, Output = u16, Error = E>
where
    E: ParseError<I>,
    I: Input<Item = u8>,

Recognizes an unsigned 2 bytes integer

If the parameter is nom::number::Endianness::Big, parse a big endian u16 integer, otherwise if nom::number::Endianness::Little parse a little endian u16 integer.

use nom::number::u16;

let be_u16 = |s| {
  u16::<_, (_, ErrorKind)>(nom::number::Endianness::Big).parse(s)
};

assert_eq!(be_u16(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0003)));
assert_eq!(be_u16(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(1))));

let le_u16 = |s| {
  u16::<_, (_, ErrorKind)>(nom::number::Endianness::Little).parse(s)
};

assert_eq!(le_u16(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0300)));
assert_eq!(le_u16(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(1))));