pub fn u16<I, E: ParseError<I>>(
endian: Endianness
) -> fn(_: I) -> IResult<I, u16, E> where
I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength,
Expand description
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.
Streaming version: Will return Err(nom::Err::Incomplete(_))
if there is not enough data.
use nom::number::streaming::u16;
let be_u16 = |s| {
u16::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(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)(s)
};
assert_eq!(le_u16(&b"\x00\x03abcefg"[..]), Ok((&b"abcefg"[..], 0x0300)));
assert_eq!(le_u16(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(1))));