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Re: [RFH] zlib gurus out there?

From
Johannes Schindelin <johannes.schindelin@gmx.de>
Date
Mar 8, 2006, 09:46 UTC
Message-ID
<Pine.LNX.4.63.0603081042320.906@wbgn013.biozentrum.uni-wuerzburg.de>
In-Reply-To
<Pine.LNX.4.64.0603071753370.32577@g5.osdl.org>
Hi,
On Tue, 7 Mar 2006, Linus Torvalds wrote:
Show 8 quoted lines
> On Tue, 7 Mar 2006, Junio C Hamano wrote:
> > >
> > > No, I don't think that's good. You're only doing a partial deflate, you 
> > > can't ask for a Z_FULL_FLUSH. That only works if you give it the whole 
> > > buffer, and you don't.
> 
> Actually, I misread what you were trying to do, and thought this was the 
> inflate phase, not the deflate.

I don't think it matters if it is inflate or deflate. ZLib keeps an internal state depending on the data. That is the whole reason why the packing is so good: it uses the redundancy in the data already seen to construct a codebook. (And that's also the reason why you can't start to deflate in the middle.)

Ciao, Dscho

Previous: Linus TorvaldsNext: Sergey Vlasov
Message 29 of 35 in “diff-delta: produce optimal pack data”
  1. diff-delta: produce optimal pack dataNicolas Pitre, Feb 22, 2006
  2. Junio C HamanoFeb 24, 2006
  3. Nicolas PitreFeb 24, 2006
  4. Junio C HamanoFeb 24, 2006
  5. Carl BaldwinFeb 24, 2006
  6. Nicolas PitreFeb 24, 2006
  7. Carl BaldwinFeb 24, 2006
  8. Nicolas PitreFeb 24, 2006
  9. Carl BaldwinFeb 24, 2006
  10. Nicolas PitreFeb 24, 2006
  11. Carl BaldwinFeb 24, 2006
  12. Nicolas PitreFeb 24, 2006
  13. Carl BaldwinFeb 24, 2006
  14. Nicolas PitreFeb 25, 2006
  15. Linus TorvaldsFeb 24, 2006
  16. Nicolas PitreFeb 24, 2006
  17. Junio C HamanoFeb 24, 2006
  18. Nicolas PitreFeb 24, 2006
  19. Nicolas PitreFeb 24, 2006
  20. Linus TorvaldsFeb 25, 2006
  21. Nicolas PitreFeb 25, 2006
  22. Linus TorvaldsFeb 25, 2006
  23. Nicolas PitreFeb 25, 2006
  24. Nicolas PitreFeb 25, 2006
  25. [RFH] zlib gurus out there?Junio C Hamano, Mar 7, 2006
  26. Linus TorvaldsMar 8, 2006
  27. Junio C HamanoMar 8, 2006
  28. Linus TorvaldsMar 8, 2006
  29. Johannes SchindelinMar 8, 2006
  30. write_sha1_file(): Perform Z_FULL_FLUSH between header and dataSergey Vlasov, Mar 8, 2006
  31. Junio C HamanoMar 8, 2006
  32. Sergey VlasovMar 8, 2006
  33. Linus TorvaldsFeb 25, 2006
  34. Carl BaldwinFeb 24, 2006
  35. Nicolas PitreFeb 24, 2006

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