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C++: No output for Char* when on AIX. Worked on Linux

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Top Forums Programming C++: No output for Char* when on AIX. Worked on Linux
# 8  
Old 12-06-2010
Quote:
Originally Posted by Leedor
I tried changing the signature to
Code:
char *CrncyFmt (const char* CharIn, const char* CharDecPrecNum)

but then compilation failed:
Code:
"CrncyFmt.cpp", line 63.24: 1540-0258 (S) A return value of type "char *" cannot be initialized with an expression of type "const char *".

It means what it says it means. You're trying to return a const char * as a char *.

I have no idea what you're doing now, but whatever it is, you shouldn't be doing that. Are you at least returning a static local buffer yet?
This User Gave Thanks to Corona688 For This Post:
Leedor
# 9  
Old 12-06-2010
Just take the orginal and change the return statement at the end to this:

Code:
return( ::strdup( StrOut.c_str() ) );

Just make sure you call ::free() on the returned pointer. Not delete - ::free().

Passing in a buffer means you have to deal with the off chance of getting a string longer than you buffer - you can't ignore that.
This User Gave Thanks to achenle For This Post:
Leedor
# 10  
Old 12-07-2010
Corona, thanks for your reply and help, unfortunately my almost non-existent C++ knowledge means I'm sure I've misunderstood you and am not doing it right.

Achenle: I tried your solution and it seems to work fine. Have not yet been able to test from within Datastage yet, but thanks very much for you help!
# 11  
Old 12-08-2010
Quote:
Originally Posted by Leedor
Corona, thanks for your reply and help, unfortunately my almost non-existent C++ knowledge means I'm sure I've misunderstood you and am not doing it right.
Don't apologize, I don't expect you to know everything. But I can't correct your code if I can't see it from here either! You have to post it! Smilie
Quote:
Achenle: I tried your solution and it seems to work fine. Have not yet been able to test from within Datastage yet, but thanks very much for you help!
Will Datastage be able to free() the resulting memory after? if not, your application will leak memory. I suspect it would not, hence why I was suggesting static local variables instead.
# 12  
Old 12-08-2010
Hi Corona,

Thanks again for getting back to me. My final code is as achenle suggested: as per my original attachment with that single change. This seems to work fine and I have checked the Datastage forums and verified that it handles memory allocation to ensure no leaks.

Cheers,

Lee
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