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

Hello Mark,

Am 20.10.2024 um 15:55 schrieb Mark Waterbury <[email protected]>:

> See:
>      https://www.ibm.com/docs/en/ssw_ibm_i_74/rzarh/sc092712.pdf
> 
> 
> Read pages 200-201.

Thanks for the pointer!

To make it more easy for other readers, these things need to be considered:

- Expand #pragma mapinc. The "options" field must contain "nullflds".
- Expand the _Rropen() call. The options string must contain "nullcap=y".
- Compile with OPTIONS(*SHOWUSR) to see the additional struct(s) in the compiler log for subsequent writing of appropriate code.

Everything else is somewhat tersely explained in the PDF linked by Mark.

:wq! PoC



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