Tandem Port of Info ZIP (unzip)=======================Recent changes:1. Support UNZIPing of EDIT (text) files by use of the "-a" parameter2. Changes for version 2.2 affected files:- TANDEMC     (changes to stat() to pass file creation time)- ZIPINFOC    (exclude TANDEM from tzset() test)3. Fix to default time/date field to UK format (dd/mm/yyyy)03/08/98  5.33f   Updates for TANDEMC/H to keep instep with ZIP (file buffering)                 New DOIT macro for extracting files from archive                 Fix in2ex to expand full vol/subvol depending on '-j' flag17/08/98  5.33f   Set USE_EF_UT_TIME to allow for timezone changes18/08/98  5.33f   Use define LICENSED to buld object able to update timestamps19/08/98  5.33f   Add -X flag support (restore file owner id) via unzip.c/h                 new chown function in tandem.c.                 Modified close_outfile to make the chown the last step.30/11/98  5.41a  Updated mapname/chmod/in2ex, include licensing in MAKE21/12/98  5.41a  Add decoding of new Tandem extra field EF_TANDEM                 Make '-a' default option.  Add '-b' option to force creation                 of 'C' filecode 180 type text files.                 If available populate Tandem file code (e.g. Object files)                 Rationalised TANDEMH and TANDEMC wth ZIP 2.3i                 Fixed MORE (-M flag) processing by creating zgetch()12/01/99  5.41a  Correct bug stopping setting of last open timestamp24/03/99  5.41b  Split TANDEMC into TANDEMC/TANZIPC/TANUNZC24/03/99  5.41b  Added TANNSKH to allow for declarations which require                 structures defined in ZIPH after call to TANDEMH07/05/99  5.41c  Assume not DST if can't resolve time (no DST table available)01/06/99  5.41c  Add steps to make Self Extracting files (SFX)12/01/01  5.42g  Fix problems with MAKE for WIDE objects, updated TANDEMC/H                 in line with ZIP, updated DOIT to remove TIMEZONE.C                 If we ever want to use TIMEZONE.C then we need to set the                 define IZTZ_DEFINESTDGLOBALS, it then compiles OK.  The object                 would need to be added to the building of UNZIPLIB in make.09/02/01  5.50a  Added code to tandem.c to create files with appropriate                 extent sizes, or actual values if file was originally NSK15/02/01         Update tandem.c to force first character to 'A' for Tandem                 filenames12/04/01  5.50c  Fix problem with duff EF lengths in ef_scan_for_tandem12/04/01         Change definition of nsk_attrs to allow for Wide mode and                 subsequent respecifications of procedures that use it12/04/01         Fix bug in tanunz.c so that call to FILE_ALTERLIST_ has upper                 case filename12/04/01         Update tandem.c to only allow '$' in in2ex as appropriate16/07/01  5.50g  Fixed bug in tandem.c for incorrect use of slist_items rather                 than vlist_items18/07/01         Allow edit files to be created with original extentsA few notes about the files on this subvolCOMMACS   -  required by MAKE, *** held on ZIP subvol ***DOIT      -  macro to extract required Tandem files from archive and renameMACROS    -  required by MAKE, *** held on ZIP subvol ***MAKE      -  recompile UNZIP code, attempts to only recompile changed codeMAKESFX   -  make SFX header fileREADME    -  this fileUNZIPLIB  -  library of ZIP compiled routines, used by ZIP/ZIPNOTE etcUNZIPL    -  ZIP object (bound using LARGE memory model)*C        -  Source file*H        -  Header files*O        -  Individual object files (when compiled by MAKE)Install Notes:==============Stage 1 - get UNZIP object onto Tandem- download Tandem Unzip executables archive from Web- using PC unzip program (e.g. pkunzip/WinZip) extract UNZIP- copy UNZIP from PC to Tandem in Binary mode s(FTP/IXF)- alter file code to 100- optionally place in $SYSTEM.SYSTEM to allow easy access from command lineStage 2 - (optional) retrieve source code (requires UNZIP on Tandem)- download UNZIP source archive from web - contains all supported platforms- copy archive onto Tandem as Binary- extract Tandem DOIT macro ( UNZIP -j <archive> tandem/DOIT )- update DOIT macro to point at archive file- restore relevant files by running DOIT- replace references to $T with a collector on your system- replace references to SUPER.DAVES with whatever user id you use- to compile run MAKE (compiles, accelerates, licences)- NOTE:  Always run the accelerated object on TNS/R systems, otherwise         it runs extremely slow.Additional Notes - LICENSE the object:======================================If you wish to be able to update the last modified time of files you unzipyou need to add the line "#define LICENSED" to the TANDEMH file.  If you setthis option you MUST FUP LICENSE the file as SUPER.SUPER.This is a Tandem restriction since we have to call a PRIV procedure to updatethe file label.  For UNZIP the define is setup (default) in tandem.hAdditional Notes - Self Extracting==================================To create a Self Extracting (SFX) file you need to do the following- run the MAKESFX file to create the SFX object files- create a normal Zip file- create an empty Unstructured file- FUP COPY SFX into new file- FUP COPY your Zip file to the end of this new file- run ZIP -A <zipfile> to fix the internal pointers- alter the filecode of <zipfile> to 100 (I'll do this in Zip -A soon)For performance you should Axcel the finished file.