CONTENT
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LZW.FOR        implementation of LZW-algorithm written in "almost standard"
               FORTRAN
HSH.FOR        hash-table routines written in "almost standard"
               FORTRAN
BF.FOR         bit-manipulation routines written in Salford Fortran 77
               for DOS (se documentation below)
STR.FOR        string routines written in Salford Fortran 77
               for DOS (se documentation below)
TST.FOR        test-program for testing the routines  written in
               Salford Fortran 77
TST.LNK        link file for Fortran 77

The needed support routines supplied in Salford Fortran 77 for DOS
has the following functionality:

  BF_PACK ( CHARSTRING, FROMBIT, NOBIT, VALUE )
     -         c*(*)      i*4     i*4    i*4
  BF_UNPACK ( CHARSTRING, FROMBIT, NOBIT, VALUE )
     -           c*(*)      i*4     i*4    i*4
  STR_INIT ( CHARSTRING, SINGLECHAR )
     -          c*(*)       c*1
  STR_HASH ( CHARSTRING, MODULUSVAL )
     i*4       c*(*)        i*4

These four routines had been VMS assembler routines written by 
Arne Vajhoj. They are the only part of the files which are
system-dependent. 

Many thanks to Arne to offer the LZW-package via internet and
for help on translation to Salford Fortran.

Graz, Mai 1995                                   Robert Hoschek
                           (e-mail: hoschek@igte.tu-graz.ac.at)