Re: [cc65] Compression (was: Atmos (was: Regbank))

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From: Ullrich von Bassewitz (uz_at_musoftware.de)
Date: 2003-01-05 22:25:27


On Sun, Jan 05, 2003 at 10:19:47PM +0100, Piotr Fusik wrote:
> file_unpack() doesn't seem to operate on files -- rather on memory,
> just like my functions. What's the compression format? My functions
> operate on standard ZLIB and DEFLATE formats.

From the comments it seems to be LZ77. I'm no compression specialist, but
wasn't this the (patented) compression algorithm used in the old compress
program and GIF images? If so, INFLATE/DEFLATE should work better for most
input files. However, the zlib unpacker seems to be larger than the LZ77 one
written by Jede.

Regards


        Uz


-- 
Ullrich von Bassewitz                                  uz_at_musoftware.de
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