Re: Arrays

[Igor.Beslic@xxxxxxxxxxxx]

It's true that this is good way way for saving necessary mem space but 
still  this array is limited to 20000 elements!!
For exapmple replace line
 C     1             DO        50            index
with this
 C     1             DO        20001         index

and you'll get a array out of bounds error at line
C                   MOVE      index         array(index)

Best regards,
Igor Bešlić, dipl. ing. rač. 
VOLKSBANK d.d.
OJ Informatika
Zelinska 2, 10000 Zagreb
tel: +385 1 6326422



MWalter@xxxxxxxxxxxxxxx 
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29.03.2005 16:15
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Re: Arrays






Yes, you'll have to base you're array on a pointer. Then increase the
allocation size. Take a look at the ALLOC, REALLOC, and DEALLOC op codes.
Here's a quick 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
****************** End of data *******************************************
Thanks,

Mark

Mark D. Walter
Senior Programmer/Analyst
CCX, Inc.
mwalter@xxxxxxxxxx
http://www.ccxinc.com


 
             "Douglas W. 
             Palme" 
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                                       Arrays 
 
             03/29/2005 09:08 
             AM 
 
 
             Please respond to 
              RPG programming 
              on the AS400 / 
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In using VB and C I have the ability to dynamically increase an array's
size
from say 50 to 100 without losing the existing data, is this possible in
RPG?

>From all that I have been able to read on arrays in RPG so far I don't 
see

it as possible, but I'm hoping there is something available that the books
and PDF's don't cover.

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