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Status Not under consideration
Workspace COBOL Compilers
Created by Guest
Created on Sep 30, 2015

RELATED IDEAS

Secured Move Overlapping

Sometimes it may be necessary to shift data within a structure.
Example:
- Insert / remove an item in a sorted memory table.
- Insert / replace / remove a substring in a string.
For this we can define a more or less complex and CPU expensive algorithms, or attempt to do a "MOVE OVERLAPPING".
In Enterprise Cobol V5 (and earlier versions), the "MOVE OVERLAPPING" works fine from right to left (the source address is greater than the target address), but for a shift from the left to the right part of data are overwrited. This is due to the use of the assembler instruction MVCL and the call to IGZCVMO routine when MVCL fire a "Condition 3".

Would it be possible to provide data shift functions (intrinsic function or native code) in structures without risk of overwriting data ?

Idea priority Low
  • Guest
    Reply
    |     Dec 16, 2020

    IBM Enterprise COBOL for z/OS is a continuous delivery offering, and aims to satisfy the needs of a rapidly evolving market segment. Product strategy evolves and requirements are continuously evaluated against that strategy. This RFE has recently been reappraised against the wider product strategy and does not fall into IBMs delivery plans for the next 12 month. Whilst this RFE might be valid and we might look to deliver longer term, this RFE is being rejected at this time. The requirement will be kept in our internal RFE backlog and might be reassessed in the future.

  • Guest
    Reply
    |     Jan 6, 2016

    Valid RFE. Will be updated once put into plan.

  • Guest
    Reply
    |     Nov 4, 2015

    This RFE is still under consideration.

  • Guest
    Reply
    |     Oct 2, 2015

    See attachment for OVERLAP2 program wich use "memmove" routine to shift data.
    Problem : call to "memmove" need a static call (abend S0C1 with dynamic call)... :-(
    "memmove" do a call to CEEEV003, runtime C/C++.

  • Guest
    Reply
    |     Oct 2, 2015

    Attachment (Description): Version of OVERLAP program with call to "memmove" routine to shift data in secured move

    OVERLAP2.zip
    OVERLAP2.zip
    Open full size
    OVERLAP2.zip
  • Guest
    Reply
    |     Oct 1, 2015

    We need same function as "memmove" in C/C++

  • Guest
    Reply
    |     Sep 30, 2015

    Attachment (Description): Run of OVERLAP.cbl

    OVERLAP run.txt
    OVERLAP run.txt
    Open full size
    OVERLAP run.txt
  • Guest
    Reply
    |     Sep 30, 2015

    Attachment (Description): Correction of OVERLAP.cbl

    OVERLAP.cbl
    OVERLAP.cbl
    Open full size
    OVERLAP.cbl
  • Guest
    Reply
    |     Sep 30, 2015

    Attachment (Description): Sample program with table shifting

    Move Overlappin...
    Move Overlapping.zip
    Open full size
    Move Overlapping.zip

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