Re: Binary bit map in IBM i (was as/400)

You can't map binary values to EBCDIC; it wouldn't help if you could.

You just need to use RPG's bitwise operations %BITxxx against the bitmap field.

However - looking at the definition of ISO8583 bitmaps here: https://en.wikipedia.org/wiki/ISO_8583 <https://en.wikipedia.org/wiki/ISO_8583> it might be simpler to convert the whole bitmap string to an array by repetitively dividing by zero. A value of 1 indicating that the field in question is present.

It really depends on what you want to do. For example, using the %BITxxx BIFs would be the most useful if you just want to know "does the message include field x" and the division approach is better if you need to know which fields need to be processed.

It is also possible that there is an underlying MI instruction that may be surfaced that will perfomr the equivalent iof the array operation but I'm not familiar with it.

And then of course you could always call PHP, Python, node from RPG to perform the operation.

Why the heck in this day and age ISO are bothering with bitmaps is beyond me but ...


Jon P.

On Apr 19, 2023, at 12:39 AM, krishna MAdiraju via RPG400-L <rpg400-l@xxxxxxxxxxxxxxxxxx> wrote:

Hi, I am facing difficulty in reading binary bitmap in as/400.is binary bitmap need to be converted to ebcidic?how ISO8583 BINARY BITMAP is decoded in as/400
thankskrishnaM

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