[Monotone-devel] zlib vs gzip

[Markus Schiltknecht]

Hi,

Markus Schiltknecht wrote:
> Aha.. yeah, that would explain the incompatibility between the two. 
> Thanks for the hint.

Okay, in the meantime, I figured that gzip and zlib really are two 
different encapsulation formats (for the same type of compression 
algorithm, though). Matt's [1] mail explains that quite well.

Looks like zlib (> 1.2) supports both, but botan only supports zlib 
style headers and footers. We could (and probably should) use zlib only, 
instead of gzip, but that would cost a netsync flag day.

> I'd still like it best, if we could get rid of gzip.cpp, to get closer 
> to compatibility with the default botan distribution. Otherwise 
> maintenance work will grow infinitely.

Well. As I've cold-heartedly deleted the gzip files Matt created from 
the n.v.m.botan branch, I fear I've killed history for those files.

I've now readded those files in the monotone main directory, because I'm 
under the impression that it's "our" code, which we have to maintain. 
Even if it's botan derived, I don't think that code belongs to the botan 
directory. And having it there will prevent similar mistakes like mine 
this morning. Sorry for the trouble.

For some reason the update to botan 1.7.2 caused a unit test to fail 
(transform_corruption_check). That was the main reason for me to look 
into that whole issue at all. Anyway, I've now fixed that in the newly 
added gzip.cc, so we are at botan 1.7.2, and at least on my box, all 
tests are fine.

Regards

Markus

[1]: Matt: comments on .sqlite3.binary branch
http://thread.gmane.org/gmane.comp.version-control.monotone.devel/5755/focus=5783