This code is for creating and interpreting `vcdiff'.  

The full specification of the vcdiff format is in the draft RFC
(draft-korn-vcdiff-01.txt), and some discussion of how to *generate*
diffs may be found there as well.

This README provides an informal summary of how we implement vcdiff,
in three sections:

   1. The vcdiff format and how to use it.
   2. Generating vcdiffs.


1. The vcdiff format and how to use it.
=======================================

 *** holy cow i'm at home reading the paper.  -kff ***


A vdiff consists of a 4 byte header, followed by a series of
"sections".  Each section is 

   A 4 byte header -- the letters "VCD" with their eighth bits set,
   then a format version number:

      byte 1         byte 2           byte 3        byte 4
      ----------     ----------       ----------    -------------------
      0xd6           0xc3             0xc4          0x0
      `V' + 1<<7     `C' + 1<<7       `D' + 1<<7    Version (currently 0)

   
2. Generating vcdiffs.
======================