Dave,
Your pointer is a pointer to a Char. You're returning a pointer to a
pointer to a Char. So, your function signature needs to be as follows:
UInt FunctionX(Handle Source,CharPtr *Result)
{
// do stuff that doesn't impact result or source
*Result = MemHandleLock(Source);
// Result is the correct value here
return retval;
}
Cheers,
Mike
> -----Original Message-----
> From: Dave Lippincott [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, March 24, 1999 11:06 AM
> To: [EMAIL PROTECTED]
> Subject: Bad Pointers
>
> Hi
> I'm having a problem passing a pointer between functions. I have a
> function
> that takes a Handle and CharPtr. The function locks the handle and
> returns
> the pointer to the string but the CharPtr always returns as NULL (even
> though the chunk was locked properly). Is this a problem with
> CodeWarrior
> (R5) or am I doing this the wrong way?
>
> Thanks
> Dave
>
> <sample code>
> CharPtr Buffer;
> Handle MemHandle;
> .
> .
> .
> MemHandle = MemHandleNew(size+1);
> FunctionX(MemHandle,Buffer);
> // At this point Buffer is NULL - Why?
> .
> .
> .
>
> UInt FunctionX(Handle Source,CharPtr Result)
> {
> // do stuff that doesn't impact result or source
>
> Result = MemHandleLock(Source);
> // Result is the correct value here
>
> return retval;
> }
>
>
