Function winnow::number::u128

pub fn u128<I, E: ParseError<I>>(endian: Endianness) -> impl Parser<I, u128, E>where
    I: StreamIsPartial + Stream<Token = u8>,
    <I as Stream>::Slice: AsBytes,

Recognizes an unsigned 16 byte integer

If the parameter is winnow::number::Endianness::Big, parse a big endian u128 integer, otherwise if winnow::number::Endianness::Little parse a little endian u128 integer.

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::number::u128;

let be_u128 = |s| {
    u128(winnow::number::Endianness::Big).parse_next(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(ErrMode::Backtrack(Error::new(&[0x01][..], ErrorKind::Slice))));

let le_u128 = |s| {
    u128(winnow::number::Endianness::Little).parse_next(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(ErrMode::Backtrack(Error::new(&[0x01][..], ErrorKind::Slice))));

use winnow::number::u128;

let be_u128 = |s| {
    u128::<_, Error<_>>(winnow::number::Endianness::Big).parse_next(s)
};

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

let le_u128 = |s| {
    u128::<_, Error<_>>(winnow::number::Endianness::Little).parse_next(s)
};

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