CRUNCH and UNCR


                       New in Version 2.8
                           May 5, 1991
                          Gene Pizzetta


Two variations of each program are included.  CRUNCH28 and UNCR28 
     are the normal assemblies for both CP/M and ZCPR3.  CR28Z 
     and UNCR28Z run only under ZCPR3 but are smaller programs 
     with larger output buffers.  The Z-only assemblies implement 
     a suggestion from Bruce Morgen that a ZCPR3-only version of 
     UNCR could handle LZH files and still be under 8K.

This release fixes a very minor bug that would have never been 
     noticed by the user:  date stamps for files copied but not 
     crunched were transferred twice.


                       New in Version 2.7
                         April 27, 1991
                          Gene Pizzetta

First release of smaller ZCPR3-only version.

A bug was fixed that kept the archive attribute from being set on 
     the source file if the destination file was in a different 
     user area.

Another bug was fixed that caused an arbitrary number of "files 
     processed" to be reported if either program aborted because 
     of insufficient memory.


                       New in Version 2.6
                         March 26, 1991
                          Gene Pizzetta

Maybe a few sharp-eyed users spotted the fact that CRUNCH didn't 
     always create identical crunched files from identical source 
     files.  (Then again, maybe not; no one has complained.)  Be 
     assured that all the crunched files are valid, even though 
     they may contain a few extra bytes.  Failure to initialize a 
     flag before crunching each file caused the Telenet-PCPursuit 
     trapping routine sometimes to insert an extra null code or 
     two.


                       New in Version 2.5
                         March 21, 1991
                          Gene Pizzetta

Under ZSDOS, the date stamp is stored in the header of the 
     crunched file, in the same manner as the 2.3D versions, and 
     restored to disk when the file is uncrunched.

The outfile, whether crunched, uncrunched, or just copied, will 
     have the same on-disk date stamp as the source file.  You 
     can check the original date stamp of the file without 
     uncrunching it!

UNCR now uncrunches LZH-encoded files, using the R. Warren's 
     UNLZH.REL module, in addition to unsqueezing and native LZW 
     uncrunching.

UNCR checks the header of LZH files for an embedded date stamp, 
     although no LZH cruncher inserts the date at this time.  
     Nevertheless, UNCR is ready if it ever happens!

CRUNCH now recognizes LZH encoded files as "already crunched".

Now handles up to 512 matching files, if an ambiguous filename is 
     given.  If system files are excluded, they don't count 
     toward this maximum.  Version 2.4 could handle 256 and 
     version 2.3D only 127 matching files, and system files were 
     always included.

New "S" option toggles between including and excluding system 
     (hidden) files.  As distributed, system files are excluded 
     by default.

The "E" option (erase existing files) is the old "O" option.  It 
     was renamed for compatibility with most Z utilities.  "O" 
     still works, for those who prefer it.

The "I" option (inspect mode) is the old "C" option.  It was 
     renamed for compatibility with most Z utilities.  "C" and 
     "T" both still work, for those who prefer them.

All options are configurable as the default operating mode using 
     ZCNFG.  Command line options are actually toggles.

"Smart" usage screen now reflects the current effect of the 
     command line options.  Under ZCPR3 the name by which the 
     program was invoked is used in the syntax line, even if re- 
     executed with the GO command.

CRUNCH's file exclusion list can be modified with ZCNFG.

The same CFG file is used for both CRUNCH and UNCR, but some 
     configuration options are not effective for both programs.  
     See the ZCNFG help screens for full details.

If either program is aborted with a ^C, the partial output file 
     will be closed and erased, so zero-length files will no 
     longer be left behind.

Traps the Telenet and PC-Pursuit command mode sequence, using 
     Bridger Mitchell's routines from version 2.3D, so file 
     transfers will not be aborted on those systems.

If the original file already has a "Z" as the middle character of 
     its filetype (for example, "AZM"), CRUNCH will now change 
     only the last character of the filetype to a "Z", unless 
     that character is also already a "Z".  This change is from a 
     public domain patch, author unknown.

Screen displays have been compacted somewhat to allow display of 
     more filenames on the screen (twice as many in quiet mode).

High bits are now filtered when displaying filenames so you won't 
     see weird characters on some terminals.

Under ZCPR3 the command processor parses the filespecs, so all 
     permissible user areas and named directories are available.

Invalid directory specs will be trapped and generate an error, 
     rather than defaulting to the current directory, if running 
     under ZCPR33 and above.

Various messages have been added or altered to be more specific 
     or for aesthetic reasons.

Version 2.5 is a direct descendant of Steve Greenberg's version 
     2.4 and still offers all the features of that release.

Many, many thanks go to HOWARD GOLDSTEIN for his ideas, his bug 
finding skills, and his help in getting this show on the road.  
Also, my appreciation to STEVE GREENBERG for permission to 
release a new version of CRUNCH, and to BRIDGER MITCHELL for his 
conception of the embedded date stamp.

Source code has been distributed separately as CR25SRC.LBR.

     Gene Pizzetta
     481 Revere St.
     Revere, MA 02151

     Voice:  (617) 284-0891
     Newton Centre Z-Node:  (617) 965-7259
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