RE: [C400-L] using _Rreadk with a partial key - any examples?

["Jevgeni Astanovski" <J.Astanovski@xxxxxxxxxxxx>]

Adam,

The most obvious would be the following:

pFeedback = _Rreadk(pFile, pRecBuffer ,nRecLength, __KEY_EQ, pKey->Seq, 4);

Which is exactly the same, as what you did - in this particular case.

Not absolutely sure, what would happen with your program in case seq in the 
your PF is not decimal(7,0) but rather decimal(9,0). 
Because decimal(7,0) occupies 4 bytes. And probably this will be the size of 
your structure SXKey. 
But what will be the size of structure, keeping decimal of size 5 bytes?
Anyway, manual states, that key type is void. For me that means, that is 
treated as void. So I see no reason to send structure to it. As far as my 
experience says, PF do not keep any padding spaces, so probably structures must 
be unaligned (packed).

Jevgeni.


> -----Original Message-----
> From: Adam Walker [mailto:adamwalker79@xxxxxxxxxxx]
> Sent: Monday, January 10, 2005 12:59 PM
> To: c400-l@xxxxxxxxxxxx
> Subject: RE: [C400-L] using _Rreadk with a partial key - any examples?
> 
> 
> I tried setting the other fields to blank or 0, but no joy.  
> So i've removed those fields from the struct and just kept 
> the seq.  The key length is set to the struct size.  this 
> approach seems to work well.
>  
> thanks for your help guys.
>  
> solution:
>  
> typedef struct {
>  decimal(7,0) seq;     
>  //char sCus[6];
>  //char sCLC[3];
>  //char cPrime;
> } SXKey;
>  
> ....
> ....
>  
>     char* pKeyBuffer = malloc(sizeof(SXKey));
>     SXKey* pKey = (SXKey*) pKeyBuffer;
>     int nKeyLength = sizeof(SXKey);
>     pKey->seq = 28;
>  
> ....
> ....
>  
>     pFeedback = _Rreadk(pFile, 
> pRecBuffer,nRecLength,__KEY_EQ,pKeyBuffer,nKeyLength);
>  
>  
> 
>               
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