Function decode_usize 

pub fn decode_usize(buf: &mut ReadBuf<'_>) -> Result<usize>

Decode a usize varint from buf.

The bytes are parsed as a u64 varint and then converted, so the accepted wire format is the same on every target.

Errors

• Error::UnexpectedEof if buf is exhausted before the terminator byte.
• Error::VarintOverflow if the value overflows u64, or does not fit in usize on this target (values above u32::MAX on 32-bit hosts).

The cursor is unchanged on error.

Example

use wire_codec::{varint, ReadBuf};
let mut buf = ReadBuf::new(&[0x05, b'h', b'e', b'l', b'l', b'o']);
let len = varint::decode_usize(&mut buf).unwrap();
assert_eq!(buf.read_bytes(len).unwrap(), b"hello");