I'm missing how you would call zEDC from a COBOL programming running in CICS. 
The Redbook has no examples - it just says there's a callable service for High 
Level Languages. But the Services for HLL languages just says that unauthorized 
programs can use a Unix-side library.

And google has a dearth of hits for COBOL calling zEDC.

-----Original Message-----
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Tom 
Harper
Sent: Thursday, March 30, 2023 5:07 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Unzip on z/OS ?

Michael,

I would consider using zEDC which can be called by authorized and 
non-authorized programs in z/OS, and C and JAVA.

It’s very fast, and requires zEC12 GA2, zBC12, z13 or later. You must have 
certain PTFs applied.

z15 and later machines have it built in.

This is a standard format and can be used on non-IBM systems.

If applicable, you can do it without program changes using DATACLAS.

Tom Harper

Phoenix Software International

Sent from my iPhone

> On Mar 30, 2023, at 5:05 PM, Schmitt, Michael <michael.schm...@dxc.com> wrote:
>
> What if the requirement is to compress or decompress an area of memory, by 
> calling something from a COBOL CICS transaction running on z/OS, in a way 
> that it could be compatibly decompress or compress by a program running on 
> another platform?
>
> For example: CICS > compress > send across some communication path > 
> transaction on Linux > program > decompress > same data as started with
>
> The actual algorithm isn't critical, as long as it is compatible on both ends.
>
> The compressed data isn't in a file, nor are jobs being run. This is 
> transaction processing.
>
> My preference would be an algorithm that has the compression ratio of 7zip 
> with the performance of RLE. 😊
>
>
> -----Original Message-----
> From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of 
> Rahim Azizarab
> Sent: Friday, March 24, 2023 4:05 PM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: Unzip on z/OS ?
>
> File #865 on Downloads at cbttape.org
>
> I used it many times.
>
>
> regards;
>
> Rahim
>
>
>
>
>
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