Re: ILE RPG & List API's

[Pete Hall <peteh@xxxxxxxxxx>]

At 02:32 PM 4/14/98 +0000, Nigel Percy wrote:
>     Could someone give me some advice regarding using ILE RPG and list 
>     API's via user spaces. As you know you can manipulate data in user
>     spaces via pointers in ILE RPG. If I going to be retrieving data via 
>     an API into a user space and I have no idea how much data is going to 
>     be returned, what do I set the Data Structure/Array Size to?

Nigel,

The list API header contains an offset to the start of the list, and the number 
of bytes in a list entry. You declare a based structure that provides a 
template for a single list entry, and then set the pointer to the first byte of 
the entry. This can easily be accomplished by overlaying the entire data space 
with an array of bytes. Length 32767 is usually sufficient. This doesn't 
actually use up any space in your program, just make sure not to reference 
space beyond the length of the data actually returned (also in the API header).

Pete

Pete Hall
peteh@inwave.com 
http://www.inwave.com/~peteh/

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