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Re: NSInteger versus int


From: Martin Kalbfuß
Subject: Re: NSInteger versus int
Date: Thu, 6 Aug 2009 10:26:35 -0700 (PDT)

I don't understand completely. Isn't 64bit register always big enough to hold
an int?


David Chisnall wrote:
> 
> On 6 Aug 2009, at 17:50, Martin Kalbfuß wrote:
> 
>> When should I use the NS types? I can't see a reason for there  
>> exsistens. I'm
>> not sure if my sdl wrapper should use them.
> 
> NSInteger exists to make it easier for C89 code to be 64-bit safe.   
> NSInteger is equivalent to C99's intptr_t; an integer which is  
> guaranteed to be the same width as a pointer.  You can safely cast  
> between void* and NSInteger, but you can't (always) safely cast  
> between void* and int.
> 
> David
> 
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