Re: bringing windows c++ code to Macintosh
Re: bringing windows c++ code to Macintosh
- Subject: Re: bringing windows c++ code to Macintosh
- From: Ken Thomases <email@hidden>
- Date: Wed, 10 Sep 2008 09:24:54 -0500
On Sep 10, 2008, at 6:52 AM, M Pulis wrote:
What is the difference between ".m" and ".mm" files? A .m file can
not access C++ code?
A .m file is Objective-C, and .mm is Objective-C++. So, correct, a .m
file can't include C++ code (even indirectly in the headers it
#includes).
You need to examine what those HGLOBAL fields are being used for
(their semantics, not their syntax), research what the appropriate
alternative would be to achieve similar semantics in the Mac API(s)
that you've chosen, and then rework the code in terms of those new
Mac APIs. It is never going to be as simple as just declaring the
same fields with different type. You may not need those fields,
you may need different fields, you may need more fields or fewer --
it requires redesign.
Of course, yes, that was the case in my other porting projects. In
the case of the fields I am looking at they appear to be simple
pointers to pointers to globally allocated blocks of memory, much
like having an opaque handle as a field in a record.
If you're just looking for a data type which is a handle (pointer to
pointer), then you might use Handle. At this point, Handle is
archaic. It dates back to classic Mac OS (pre-Mac OS X) and isn't
used much by modern Mac APIs.
You might also just use a void** or YourCustomType**.
Regards,
Ken
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