The SIXPACK program implements a faithful port from C of a unique
compression algorithm submitted to the DR DOBBS compression contest
a few years back by Philip G. Gage.

The algorithm is implemented in the context of a stand-alone file
compression utility, which can be used to compress/decompress files
one at a time.



NOTE: There is a statement in sixpack:

CONST
  MaxDistance : Integer = CopyMax[PRED(COPYRANGES)];

  which causes the TP7 compiler to give the error "cannot evaluate
  this expression".  I have no idea why, but so long as you don't
  change anything else, you can hard code the value to be:

CONST
  MaxDistance : integer = 21839;

  TP6 does not have this problem.


Douglas P. Webb
dwebb@binkley.cs.mcgill.ca