Revlog NG == version 1 (since Mercurial 0.9)

revision index: file extension .i

Two storage types:

• each revision record is followed by patch data (next revision record starts after that data)

  This is for rather small files.

• patch data corresponding to revisions are stored externally, in a file with same base name (stem), but extension `.d'

Index record format is described at http://mercurial.selenic.com/wiki/RevlogNG

A data chunk starts either with

u	uncompressed, skip 1 byte (the `u')

0	uncompressed, dont skip

or x zlib compressed

A data chunk consists of a collection of hunks, each starting with three 4-byte values: start, end, length, followed by the data.

/home/micha/ib/wmipf.de/home/ib/mercurial/mercurial/revlog.py