upstream: import some hacked systemd headers

This brings journal-file data structures and byte swapping
helpers I may as well just reuse.

I've had to do some minor messing about to make things workable in
isolation out of the systemd tree without pulling in too much.

I've also added a new HashedObjectHeader type to encompass the
slightly larger common header components of FieldObject and
DataObject to facilitate a generic hash table iterator that can
operate on just loading HashedObjectHeader when nothing more
than the object size is needed for accounting.  Basically the
HashedObjectHeader is ObjectHeader+hash+next_hash_offset.

0 files changed, 0 insertions, 0 deletions