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Bob,

I understand what you are saying.  But I'm not sure it applies here.

Let's say my example DS is based and I use it to write to the buffer I'm going 
to pass into QUSCUSAT.  If I've got another based DS defined for another 
attribute, then my the docs, I need that 3 byte filter in the first DS so when 
I write into the buffer through the second based DS the second key in the 
buffer is at a four byte boundary.

Since the two key are separate DS's, align wouldn't affect the alignment of how 
they point into the buffer, right?

I suppose the easiest way to handle this is to only set one attribute at a time.

But for my own enlightenment, I want to understand how to do multiple ones.

Charles Wilt
iSeries Systems Administrator / Developer
Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121
 

> -----Original Message-----
> From: rpg400-l-bounces@xxxxxxxxxxxx
> [mailto:rpg400-l-bounces@xxxxxxxxxxxx]On Behalf Of Bob Cozzi
> Sent: Friday, February 04, 2005 11:15 AM
> To: 'RPG programming on the AS400 / iSeries'
> Subject: RE: Byte Alignment question with Change User Space
> AttributesAPI(QUSCUSAT)
> 
> 
> You can't really align a DS subfield, 
> Use the ALIGN keyword on the DS itself, but I think RPG 
> aligns DS's anyway
> so it shouldn't be an issue for you.
> -Bob
> 
> 
> -----Original Message-----
> From: rpg400-l-bounces@xxxxxxxxxxxx 
> [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
> On Behalf Of Wilt, Charles
> Sent: Friday, February 04, 2005 10:04 AM
> To: RPG Programming Mailing List (E-mail)
> Subject: Byte Alignment question with Change User Space Attributes
> API(QUSCUSAT)
> 
> In the docs for the  Change User Space Attributes API 
> (QUSCUSAT) is the
> following:
> 
> "Each variable length record must be 4-byte aligned. If not, 
> unpredictable
> results may occur."
> 
> also this:
> 
> "If you specify a length of data that is longer than the key 
> field's defined
> data length, the data will be truncated at the right. No 
> error message will
> be returned."
> 
> Now for example, the Initial value key has a data field that 
> is only 1 byte
> long.  Does this mean that you should add 3 bytes of filler 
> so that the next
> key is on a 4 byte boundary?
> 
> example ds
> 
>      d t_InitialValueAttr...
>      d                 ds                  qualified
>      d  key                          10I 0 inz(2)
>      d  dataLength                   10I 0 inz(%sizeof(data))
>      d  data
>      d   initialValue                 1a   overlay( data : *NEXT )
>      d                                3a   overlay( data : *NEXT )
> 
> 
> Thanks,
> 
> 
> Charles Wilt
> iSeries Systems Administrator / Developer
> Mitsubishi Electric Automotive America
> ph: 513-573-4343
> fax: 513-398-1121
>  
> 
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> 
> 
> -- 
> This is the RPG programming on the AS400 / iSeries (RPG400-L) 
> mailing list
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