RE: Dynamic Arrays

["Himanshu Mohan, Gurgaon" <himanshum@xxxxxxxxxxxxxxx>]

Exactly, I am asking same thing...I am not able to understand why this can
not be done in RPGLE..

-----Original Message-----
From: meovino@estes-express.com [mailto:meovino@estes-express.com]
Sent: Wednesday, October 16, 2002 7:04 PM
To: rpg400-l@midrange.com
Subject: RE: Dynamic Arrays



Himanshu,

Are you asking for something like REDIM in Visual Basic, where you can
redimension an array on the fly (and preserve the existing array elements
if you want to)?  The RPG gurus in my shop say it can't be done, but I'm
hoping someone here can prove them wrong.

Mike E.





                    "Himanshu Mohan,
                    Gurgaon"                To:     rpg400-l@midrange.com
                    <himanshum@ggn.hc       cc:
                    ltech.com>              Subject:     RE: Dynamic Arrays
                    Sent by:
                    rpg400-l-admin@mi
                    drange.com


                    10/16/2002 09:25
                    AM
                    Please respond to
                    rpg400-l






If you execute DO loop to 20001 instead of 50 times, this program will give
error because array dimension is fixed at 20000. program is allocating more
memory to array but it dimensions is fixed to 20000. I want to increase its
dimension at run time from 20000.

Himanshu

-----Original Message-----
From: MWalter@hanoverwire.com [mailto:MWalter@hanoverwire.com]
Sent: Wednesday, October 16, 2002 5:39 PM
To: rpg400-l@midrange.com
Subject: Re: Dynamic Arrays



define the array as based. Here is an example.
?     * array definitions
     Darray            S             10    DIM(20000) BASED(PTR)
     Dindex            s              7  0
?     * memory allocation data items
     Dptr              S               *
     Dnbr_of_elems     S              5  0 INZ(10)
     Dmem_size         S              7  0 INZ
     Dx                S             10i 0
?     * allocate the initial memory heap (initial # of elements * the size
of the array)
     C                   EVAL      mem_size = %size(array) * nbr_of_elems
     C                   ALLOC     mem_size      ptr
     C                   EVAL      x = %elem(array)
?     * loop to test
?    C     1             DO        50            index
?     * does the index exceed the current # of array elements?
?    C                   IF        index > nbr_of_elems
?     * recalculate the memory heap size by adding 10 to the number of
elements
?     * and multiplying the size of the array by the new number of
elements.
     C                   EVAL      nbr_of_elems = nbr_of_elems + 10
     C                   EVAL      mem_size = %size(array) * nbr_of_elems
?     * reallocate the memory heap and increase the size
     C                   REALLOC   mem_size      ptr
?    C                   ENDIF
?     * move data for test
     C                   MOVE      index         array(index)
?     *
?    C                   ENDDO
?     * deallocate the memory utilized
     C                   DEALLOC                 ptr
     C                   EVAL      *inlr = *on

Thanks,

Mark


Mark Walter
Sr. Programmer/Analyst
Hanover Wire Cloth a div of CCX, Inc.
mwalter@hanoverwire.com
http://www.hanoverwire.com
717.637.3795 Ext.3040

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