Re: TESTN/BITON/BITOFF

[Simon Coulter <shc@xxxxxxxxxxxxxxxxx>]

On 21/03/2009, at 9:27 AM, Jon Sinner wrote:

> %BITAND and %BITOR.  Maybe it is because it is late on Friday, but I
> just do understand the bit masks and how to use these BIF's.

In general:

If you want to test bits use %BITAND with a mask where the bits you  
want to test are ON and test the result is equal to the mask.

If you want to set bits on use %BITOR with a mask where the bits you  
want to set are ON. The result will have those bits set.

If you want to set bits off use either %BITXOR with a mask where the  
bits you want off are on, or use %BITAND with a mask that is the  
inverse of the bits you want off. The result will have those bits off.

The ILE RPG Reference has plenty of examples.

Regards,
Simon Coulter.
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