RE: [C400-L] Reading file with NULL fields

["Elvis Budimlic" <ebudimlic@xxxxxxxxxxxxxxxxxxxxxxxxx>]

Jevgeni, 

You need "rr nullcap=Y" when you open the file so you can handle the null
capable fields.
If that doesn't suffice you may want to learn more about file handle's null
input map (fp->in_null_map).

Elvis

-----Original Message-----
From: c400-l-bounces@xxxxxxxxxxxx [mailto:c400-l-bounces@xxxxxxxxxxxx] On
Behalf Of Jevgeni Astanovski
Sent: Wednesday, December 17, 2003 4:13 PM
To: C programming iSeries / AS400
Subject: [C400-L] Reading file with NULL fields

There should be some trick about reading files with NULL-capable fields!
But I deal with it for the first time....
 
Have a file Y6CPF:
 
A          R Y6CPFR                                              
A            CPNC           6A         TEXT('Account number')    
A            DLP            3A         TEXT('Deal type') ALWNULL 
 
Try to read it :
 
fp = _Ropen("*LIBL/Y6CPF", "rr") ;
 
fb = _Rreadf(fp, &Collateral, sizeof(y6cpf), __NO_LOCK) ;
while (fb->num_bytes == sizeof(y6cpf))                   
{
  ...
  fb = _Rreadn(fp, &Collateral, sizeof(y6cpf), __NO_LOCK) ;
}
 
Nothing strange, I always do it like this.
Program gets out of the loop on first record, having field DLP=NULL.
Shit! And my goal was to find just these records...
What's wrong? It SHOULD be as simple as usual!
Any help will be really appreciated.
 
Jevgeni Astanovski.