pub fn compare<R: Read, B: AsRef<[u8]> + AsMut<[u8]>>(
sig: &Signature,
r: R,
block: B,
) -> Result<Delta, Error>Expand description
Compare a signature with an existing file. This is the second step
of the protocol, r is the local file when downloading, and the
remote file when uploading.
block must be a buffer the same size as sig.window.