Re: [ECOS] zlib_uncompress usage(more info)

[Thomas Koeller <thomas.koeller@baslerweb.com>]

Zlib needs _huge_ buffers in RAM. A description of how to
estimate the amount of ram required can be found in
packages/services/compress/zlib/current/include/zconf.h.

tk


John Newlin wrote:
> Most likely you need to skip around the gzip header (or strip the header
> prior to programming the image into flash)
>
> If you have the zlib code, look in gzio.c for the function check_header
> as an example
>
> -john
>
> bhanuprakash kandimalla wrote:
> >Just want to put some more info to my previous mail.
> >
> >Hello Ecos World:
> >Did any one use the zlib uncompress function. This
> >funtion has the following structure:uncompress(dest,
> >dest_len, source, source_len). Is there anylimit on
> >the souce_len to use. I have a compressed image stored
> >in boot flash and want to uncompress onto RAM. The
> >source file is of 177768 bytes. Some how when I use
> >this function, it always returns Z_MEM_ERROR. (I used
> >the Cygwin tool to create the compressed image
> >(gzip)).
> >
> >>>This Z_MEM_ERROR is returning from inflate_blocks()
> >
> >function. What does this mean...
> >
> >Can someone suggest me where I am doing wrong. I
> >appreciate any help.
> >Thanks in advance
> >
> >
> >
> >
> >__________________________________
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-- 
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Thomas Koeller, Software Development
Basler Vision Technologies

thomas dot koeller at baslerweb dot com
http://www.baslerweb.com

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