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RE: DEFLATE, ZLIB and RFC1951

To: "'Joern Sierwald'" <joern.sierwald@F-Secure.com>
Subject: RE: DEFLATE, ZLIB and RFC1951
From: "Paul Onions" <Paul_Onions@siliconinfusion.com>
Date: Tue, 24 Jul 2001 11:30:47 +0100
Cc: <ipsec@lists.tislabs.com>
Importance: Normal
In-Reply-To: <3.0.5.32.20010724090805.0500b510@smtp.datafellows.com>
Sender: owner-ipsec@lists.tislabs.com


> From: Joern Sierwald
>
> ZLIB _does_ produce these. And when single stepping through the
> inflate_blocks() routine, it certainly interprets them
> correcty.
>
>       NEEDBITS(3)
>       t = (uInt)b & 7;
>       s->last = t & 1;
>       switch (t >> 1)
>       {
>         case 0:                         /* stored */
>           [cut]
>         case 1:                         /* fixed */
>           [cut]
>         case 2:                         /* dynamic */
>           [cut]
>         case 3:                         /* illegal */
>           [cut]
> 	}
>
> s->last is your BFINAL and t >> 1 is BTYPE.
>
> Jörn
>

Ah, thank you!

I was looking at the most-significant bits of the first byte instead of the
least-significant.  Silly me :-(

Regards,
Paul(o)

References:

Re: DEFLATE, ZLIB and RFC1951

From: Joern Sierwald <joern.sierwald@F-Secure.com>

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