Hi,

I am using zlib 1.2.1 the following way:

- Compress mmap'ed file with the "compress"-function.
  The original size of the file is saved in the first 4 bytes of the
compressed file

- Decompress mmap'ed files with the "uncompress"-function

Everthing works fine, but if the compressed file is approximately larger
than 1 MB "uncompress" returns Z_DATA_ERROR. In the result file I can see
that zlib stops prematurely.

After digging around I suspect checksum problems or windows size problems
(windowBits parameter). Unfortunately I do not know how to set this
parameters.
I want continue to use mmap'ed files - not streams.

Any help would be greatly appreciated.

Martin

"Martin Koppmann" <martin.koppmann@deutsche-software.de> wrote in message news:<bvb7jj$bi8$02$1@news.t-online.com>...
> - Compress mmap'ed file with the "compress"-function.
>   The original size of the file is saved in the first 4 bytes of the
> compressed file
> 
> - Decompress mmap'ed files with the "uncompress"-function

I recommend that you first get it working without mmap (and it will),
and then introduce mmap to see where the problem is.

mark