Re: [GD-General] meaning of sizeof(int) on all plateform

[Evan R. <ev...@en...>]

On Friday, June 27, 2003, at 04:52 PM, Jay Woodward wrote:

> Hold on -- it seems to me that the existence of forward declaration  
> necessitates that all pointers be the same size.
>
> I suppose you wouldn't lose information when casting, as long as it's  
> guaranteed that sizeof(void*) >= sizeof(any other pointer).  Still, my  
> understanding has always been that all pointers are the same size.

Once again, the segmented architecture of the 8088 under DOS is a  
counterexample.  There are "near pointers" which are 16 bit offsets  
into a standardized segment, and "far pointers" which are 32 bit  
segment:offset pairs (which makes comparing far pointers interesting,  
BTW).

I can easily imagine an embedded architecture having different length  
pointers for code pointers and data pointers, as well.  In that case, I  
assume (always dangerous) that void * would be large enough to hold the  
largest pointer, as Jay suggests, above.

	Evan

>> -----Original Message-----
>> From: Gareth Lewin [mailto:GL...@cl...]
>> Sent: Friday, June 27, 2003 1:45 AM
>> To: gam...@li...
>> Subject: RE: [GD-General] meaning of sizeof(int) on all plateform
>>
>>
>> btw, sizeof(pointer) isn't a real value, it is perfectly
>> valid for a certain
>> platform to have differant sizes of pointers, so sizeof (void*) is not
>> always == sizeof(int*).
>
>
>
> -------------------------------------------------------
> This SF.Net email sponsored by: Free pre-built ASP.NET sites including
> Data Reports, E-commerce, Portals, and Forums are available now.
> Download today and enter to win an XBOX or Visual Studio .NET.
> http://aspnet.click-url.com/go/psa00100006ave/direct;at.asp_061203_01/ 
> 01
> _______________________________________________
> Gamedevlists-general mailing list
> Gam...@li...
> https://lists.sourceforge.net/lists/listinfo/gamedevlists-general
> Archives:
> http://sourceforge.net/mailarchive/forum.php?forum_idU7
>
>
>
--
Engines of Mischief Consulting               
<http://www.enginesofmischief.com>
Mischievous Ramblings        
<http://www.enginesofmischief.com/blogs/ramblings>
The Engine of Mischief                
<http://www.enginesofmischief.com/engine>
Mischief's Travelblog       
<http://www.enginesofmischief.com/blogs/travelblog>

Today's Oxymoron:
    Act naturally