title: zlib lz77 sliding window and max match length
body: <p>I'm trying to find two parameters (sliding window size and max match length)
  in the LZ77 algorithm (source code: <a href="http://www.zlib.net/" rel="nofollow">http://www.zlib.net/</a>) in order to analyse different 
  levels of compression. At first, I found the CHUNK value in zpipe.c to be the max match length parameter, and the sliding window to be the parameter windowBits in the function deflateInit2 in deflate.c
  The problem is that the compressed files in different compression levels according
  to these parameters are identical no matter the parameters are.</p>
  
  <p>if someone used this source code and already recognized theses parameters in the code,
  it will be very helpful for me.</p>
  
  <p>Thanks!</p>