Re: [cc65] returning structs

From: Oliver Schmidt <>
Date: 2009-08-10 11:31:04
Hi Groepaz,

>> I know that you cant return a struct by value.  Is there any way around
>> this?  If I return a pointer to the struct, the values are lost upon
>> leaving the function.  Can anyone provide an example workaround?

> make it return a pointer, and then copy it to a local struct:
> memcpy(&localstruct,functhatreturnsstruct(),sizeof(localstruct));
> (thats pretty much almost exactly what a compiler would do too)

Maybe it's woth mentioning that your proposal presumes that memcpy()
a) is inlined / is a specially designed intrinsic / <you name it>
b) doesn't use the stack itself
because otherwise calling it could overwrite the data you want to
copy. From that perspective I'd rather classify this approach as hack
than as workaround.

Best, Oliver
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Received on Mon Aug 10 11:31:08 2009

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