ILE RPG & List API's

[nigel.percy@xxxxxxxxxxxxx]

     Hi All,
     
     
     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?
     
     If I set it 'Really Big' this will obviously have a negative impact on
     the amount of storage that the pgm uses.
     
     You can't use dynamic allocation because I don't know how items are 
     going to be returned via the API.
     
     The pointer method seems to be at a disadvantage when compared with 
     using the QUSRTVUS and incrementing the offset
     
     Please someone tell me I got it wrong and that the pointer method is 
     the way to go.
     
     
     Nigel Percy
     
       _______________________________________________________________
                Please note that the e-mail address for 
               P&O Cruises has changed to @pocruises.com
{\rtf1\ansi \deff0\deflang1024{\fonttbl{\f0\froman Tms Rmn;}{\f1\froman Symbol;}{\f2\fswiss Helv;}}
{\colortbl;\red0\green0\blue127;\red0\green127\blue0;\red0\green127\blue127;\red127\green0\blue0;
\red127\green0\blue127;\red127\green127\blue0;\red127\green127\blue127;;\red0\green0\blue255;
\red0\green255\blue0;\red0\green255\blue255;\red255\green0\blue0;\red255\green0\blue255;
\red255\green255\blue0;\red255\green255\blue255;}\paperw12240\paperh15840\margl1800\margr1800\margt1440\margb1440
\gutter0 \defformat\sectd \pard\plain {\plain \f0 \cb7 \cf0 \cb7 \cf0      \cb7 \cf0 Hi All,\
\cb7 \cf0      \
\cb7 \cf0      \
\cb7 \cf0      \cb7 \cf0 Could someone give me some advice regarding using ILE RPG and list \
\cb7 \cf0      \cb7 \cf0 API's via user spaces. As you know you can manipulate data in user\
\cb7 \cf0      \cb7 \cf0 spaces via pointers in ILE RPG. If I going to be retrieving data via \
\cb7 \cf0      \cb7 \cf0 an API into a user space and I have no idea how much data is going to \
\cb7 \cf0      \cb7 \cf0 be returned, what do I set the Data Structure/Array Size to?\
\cb7 \cf0      \
\cb7 \cf0      \cb7 \cf0 If I set it 'Really Big' this will obviously have a negative impact on\
\cb7 \cf0      \cb7 \cf0 the amount of storage that the pgm uses.\
\cb7 \cf0      \
\cb7 \cf0      \cb7 \cf0 You can't use dynamic allocation because I don't know how items are \
\cb7 \cf0      \cb7 \cf0 going to be returned via the API.\
\cb7 \cf0      \
\cb7 \cf0      \cb7 \cf0 The pointer method seems to be at a disadvantage when compared with \
\cb7 \cf0      \cb7 \cf0 using the QUSRTVUS and incrementing the offset\
\cb7 \cf0      \
\cb7 \cf0      \cb7 \cf0 Please someone tell me I got it wrong and that the pointer method is \
\cb7 \cf0      \cb7 \cf0 the way to go.\
\cb7 \cf0      \
\cb7 \cf0      \
\cb7 \cf0      \cb7 \cf0 Nigel Percy\
\cb7 \cf0      \
\par }}