On 27/10/2009, at 12:19 AM, Erik Olsson wrote:

I'm passing a struct that contains fields of various datatypes, including
packed decimal, from a RPG program to a C++ srvpgm. The issue is that the
decimal fields are received on the C++ side as zoned decimal, not as packed
decimal. I haven't found anything in the Programmer's guide explaining this

Are you sure the numeric fields are decimal in the RPG program? Your description implies the packed decimal fields are contained in a data structure. The default behaviour for RPG is to define numeric fields in a data structure as zoned decimal (because the data structure is presumed to be a big character field--historical reasons). Even if the packed decimal field is defined elsewhere in the program (e.g., external file description) it will be remapped to zoned decimal by the compiler.

If the above is a correct guess at the cause of your problem then you'll either need to modify the RPG program and define the fields as packed decimal in the data structure or redefine the C/C++ data structure with char[] fields and convert them to decimal before use.

Simon Coulter.
FlyByNight Software OS/400, i5/OS Technical Specialists

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