RE: Dealing with very large blocks of character data

If you don't mind, can you send us the link to get to these RPG procedures so that we can also share your knowledge and learn from you?

Wai Mok
System Analysis
CMRG

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Rory Hewitt
Sent: Wednesday, November 30, 2011 1:16 PM
To: RPG programming on the IBM i / System i
Subject: Re: Dealing with very large blocks of character data

David,

The C APIs are actually pretty easy to use, but as Henrik says, you can use
plain ole' RPG to do much of what you want. I have a bunch of RPG
procedures to do memory scanning/replacing/trimming etc. Want them?

Rory

On Wed, Nov 30, 2011 at 9:50 AM, Henrik Rützou <hr@xxxxxxxxxxxx> wrote:

David,

what are you analyzing and how do you need to manipulate the data ?

Can you give a breif description of the task ?


On Wed, Nov 30, 2011 at 6:37 PM, Monnier, Gary <Gary.Monnier@xxxxxxxxx

wrote:

Can you use a user space? That gives you 16 Mb.

Sent from my iPhone

On Nov 30, 2011, at 9:26 AM, "David Gibbs" <david@xxxxxxxxxxxx> wrote:

Folks:

I've got a problem where I need to analyze and manipulate very large

blocks of character data.

This character data could be well in excess of 64k.

Since the limit for RPG character fields on 5.4 is 64k ... I can't use

normal BIF's.

Upgrading to 6.1 isn't an option due to customer requirements (this was

my first idea, but it got shot down).

My current thought is to use pointers and C functions to analyze the

text in the space.

%alloc to create space and get a pointer

strstr in place of %scan(s)
strlen in place of %len(%trim(s))
strcat & %realloc in place of s1 + s2
strncpy in place of %subst

dealloc when I'm done with the space.

Obviously I would wrapper the C functions in procedures so I don't have

to deal with the individual C api's directly.

I'm not supper happy with the idea of having to deal with this data

using pointers and C api's ... Any suggestions on a different approach to
handling these large character variables?

Thanks!

david
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