pub fn walk(pack: &[u8], oid_len: usize) -> Result<PackWalk>Expand description
Walk a pushed pack’s entries.
oid_len is 20 for sha1 and 32 for sha256 — a REF_DELTA’s base oid is raw
bytes with no length prefix, so the width has to be known from outside the
pack. That is git’s own situation.
P-4: a malformed or hostile pack returns Err, never a panic and never a
half-truth. Every arithmetic step is checked against the buffer’s end.