SCCS misinformation Rumor-Control (was Re: RCS vs. SCCS)

[Randal Schwartz]

In article <2265 at tellab5.tellabs.com>, segel at tellab5 (Mike Segel) writes:
|    SCCS uses forward deltas. This means that when you "check in"
|    a piece of code, the original is stored, and the later copies
|    are really deltas based on the original.

Ack. Pthpth. Not this bad piece of misinformation going around *again*.

SCCS uses a method that can get it to any delta *equally well*, (or
equally poorly, depending on your bent).  It doesn't lean in the
backwards or forwards direction *at* *all*.  Just 'cuz the doc sez
something like "noticing the differences" doesn't mean it's storing
them that way.  Internally, it uses something like tagged lines, and
it pulls out all the lines in order that match a particular mix,
computed as a function of the delta that you asked it to generate.

Just another SCCS/RCS/whatever user,
-- 
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