Re: Checking for NULL field in C when using Record I/O - part 2

Hi Patric

given the shortage, any help is good.

I am correcting a small generic utility for saving and clearing records
(purge) from a given table. I am including null handling. In this case I
just copy (memcpy) 'in_null_map' into 'out_null_map'.

Thanks for your help.

Javier Mora

El lun, 24 feb 2025 a las 19:45, Patrik Schindler (<poc@xxxxxxxxxx>)
escribió:

Hello Javier,

Am 24.02.2025 um 09:53 schrieb datil400 <datil400@xxxxxxxxx>:

I find the information provided in the manuals on this subject very poor.

It's very, very terse, yes.

Macros are not conveniently explained and there are no good examples.

Hence my expansion on the subject from a few days ago.

I am doing “reverse engineering” and “trial and error”.

Same here. I strongly recommend to add options(*showusr) to the compiler
arguments, so you can see the includes which have been generated by #pragma
mapinc. Helps a lot!

For what I need I have discovered that I have to adjust the

_RFILE.out_null_map subfield.

Adjust what precisely in which manner?

:wq! PoC


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