# Function nom::number::streaming::u128

source · [−]

    pub fn u128<I, E: ParseError<I>>(
        endian: Endianness
    ) -> fn(_: I) -> IResult<I, u128, E> where
        I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength,

Expand description

Recognizes an unsigned 16 byte integer

If the parameter is `nom::number::Endianness::Big`, parse a big endian u128 integer, otherwise if `nom::number::Endianness::Little` parse a little endian u128 integer. Streaming version: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data.

    use nom::number::streaming::u128;

    let be_u128 = |s| {
      u128::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s)
    };

    assert_eq!(be_u128(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00010203040506070001020304050607)));
    assert_eq!(be_u128(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(15))));

    let le_u128 = |s| {
      u128::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s)
    };

    assert_eq!(le_u128(&b"\x00\x01\x02\x03\x04\x05\x06\x07\x00\x01\x02\x03\x04\x05\x06\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x07060504030201000706050403020100)));
    assert_eq!(le_u128(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(15))));