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Hello!I've been fiddling with C, modules, bound service programs, etc, and have come to a situation where I need the expertise of someone a bit more knowledgeable.
midrange.com
Given the following C Source:
0001.00 #include <stdio.h>
0002.00 #include <string.h>
0003.00 #include <stdlib.h>
0004.00
0005.00 char* getStr(int incomingVar);
0006.00
0007.00 char* getStr(int incomingVar)
0008.00 {
0009.00 char foo[25];
0010.00 sprintf(foo,"%d",incomingVar);
0011.00 return foo;
0012.00 }
And given the following ILE RPG Source:
0001.00 D getStr PR 25A extproc('getStr')
0002.00 D 5I 0 VALUE
0003.00 C MOVEL *BLANKS FOOSTR 25
0004.00 C Eval FOOSTR = getStr(1)
0005.00 C Eval *INLR = *ON
(I've compiled the C source as a module, then created a service program
using crtsrvpgm -- kudos to IBM for having an example of how to write a
QSRVSRC file!)
I was expecting when I ran the rpg program, named USESTR, that FOOSTR would equal something akin to '1 ' -- that is, the visual depiction of 1 and 24 other spaces. I was greeted instead by gibberish.
I think that this has something to do with the pointer that I'm creating doesn't exist outside of the service program? Is this correct, or am I just making a big goof?
What is the "Right Way" for me to return a char* array (or even a data structure) via a bound-C service program to a RPG program? Is there even a right way to do it?
Any help would be appreciated! Peter Grace
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