Re: Bit Operation - BITAND

TESTBIT()

is available at www.rpglanguage.com/boolean

Regards,
John McKay mba

----- Original Message -----
From: "Adam Glauser" <adamglauser@xxxxxxxxx>
Newsgroups: midrange.rpg400-l
To: <rpg400-l@xxxxxxxxxxxx>
Sent: Monday, June 22, 2009 5:24 PM
Subject: Re: Bit Operation - BITAND

Michael Ryan wrote:

Hi Adam -

Actually, I have to test each bit in PrimaryBitMap to see if that bit is
on
or off.

It's too bad that there isn't a %testbit() function. As far as I know,
the most straightforward way of doing this would be to define a "mask"
for each bit you want to test.

For example, say your bit map is a set of customer information flags.
http://code.midrange.com/71a457c8f6.html

Another possibility would be to define eight masks, one mask for each
bit in a byte, then loop through each byte in the bitmap field, setting
elements of a 64-element array of indicators to *ON or *OFF as
appropriate. Then you could set up constants to name each of the bits

D ACTIVE_CUST...
D C 1
// binary 01000000....0000, test second bit
D PAYMENT_DUE_MASK...
D C 2

and say things like

if (flag(ACTIVE_CUST) = *ON);
// do active cust processing

Yet another possibility is to build a service program with one procedure
per flag, where each procedure would use one of the masks from the first
example. This might be the best way to go if you need to test these
flags in more than one place.

HTH,
Adam
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