RE: Resolve pointer on ifs file -- RPG400-L

Normally in Unix/PC world you read the entire file into memory do something
on it, and then write it back out.
For an entire IFS file, as long as it does not exceed 16 megabytes, you can
use a user space instead of real memory and read the file into a buffer
whose address is that of a user space object. 
Then cipher the data in the user space and write it back out to IFS disk.

Bob Cozzi

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Stephane Leon
Sent: Friday, February 28, 2003 2:03 AM
To: RPG programming on the AS400 / iSeries
Subject: RE: Resolve pointer on ifs file


The goal is to use _CIpher to get a md5 of ifs files.
I put x'00' in file name, but with the same error.

But maybe i posted the problem in a wrong way.

How to get a md5 fingerprint for ifs files ?

Md5 with string is ok.
I need now to process in _Cipher a ifs file.
Maybe later with *File.
My approach was to put the resolved ifs pointer in _cipher
and processed the md5 as usual.

How can i do that ?

I read ''ACCESS to IFS'' thread and only see is X'1E01'
and its possible to resolve but don't see how.
I don't know if ifs api can resolve my pb.


Thanks.

-----Message d'origine-----
De : rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]De
la part de Scott Klement Envoye : jeudi, 27. fevrier 2003 23:11 A : RPG
programming on the AS400 / iSeries Objet : Re: Resolve pointer on ifs file



Why are you trying to resolve a system pointer to an IFS object?  Why not
use the IFS APIs?   The speed bottleneck will be in disk access, not the
cost of calling the APIs.

There was a long thread discussing IFS access on the MI400 list, back in
Dec 2001 - Jan 2002.   There wasn't much RPG involved in the discussion,
but perhaps it'll explain to you which MI functions you want to use, or
convince you to skip the MI built-ins, and go for the APIs :)

http://archive.midrange.com/mi400/200112/threads.html#00078
http://archive.midrange.com/mi400/200201/threads.html#00000


If you decide to use the APIs, I wrote an eBook on the subject which you can
find here:
http://www.snap-ebooks.com/RPGIV%20and%20the%20Integrated%20File%20System.ht
m


On Thu, 27 Feb 2003, Stephane Leon wrote:
>
> I try to resolve a ptr on ifs.
> I try with rslvsp but without library name.
> So i try with _RSLVSP2 on this :
>
>  HBndDir('QC2LE')
>
>  DResolve_Ptr      PR                  EXTPROC('_RSLVSP2')
>  D Ptr                                 Like(SysPtr)
>  D Template                            Like(RslvTemplt) Const
>

[SNIP]

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