Function decode_u64 

pub fn decode_u64(buf: &mut ReadBuf<'_>) -> Result<u64>

Decode a u64 varint from buf.

Errors

• Error::UnexpectedEof if buf is exhausted before the terminator byte.
• Error::VarintOverflow if more than MAX_LEN_U64 bytes would be consumed or the final byte carries bits that would overflow u64.

The cursor is unchanged on error.

Example

use wire_codec::{varint, ReadBuf};
let bytes = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01];
let mut buf = ReadBuf::new(&bytes);
assert_eq!(varint::decode_u64(&mut buf).unwrap(), u64::MAX);
assert!(buf.is_empty());