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Re: 32 -> 64 bit serializations, NSNumber, int, NSInteger
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Re: 32 -> 64 bit serializations, NSNumber, int, NSInteger


  • Subject: Re: 32 -> 64 bit serializations, NSNumber, int, NSInteger
  • From: Quincey Morris <email@hidden>
  • Date: Tue, 19 Jul 2011 12:46:29 -0700

On Jul 19, 2011, at 12:32, Nick Zitzmann wrote:

> The only problem I ever had with unarchiving 32-bit app archives in a 64-bit app was with longs in non-keyed archives that were encoded using @encode(long)*, and that doesn't apply to your scenario.

The other issue that might rear its head is that the meaning of NSNotFound changes between 32- and 64-bit runtimes**, which makes a mess of archives that use it. The answer, of course, is to keep NSNotFound out of archives, but (as I found to my own cost) if existing code archives NSNotFound, it's really, really hard to clean the mess up.



** I mean: if you archive NSNotFound in a 32-bit application, it's no longer NSNotFound when you unarchive it in a 64-bit application. And vice versa, probably.


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  • Follow-Ups:
    • Re: 32 -> 64 bit serializations, NSNumber, int, NSInteger
      • From: Philip Dow <email@hidden>
References: 
 >Reading old NSArchiver serialization, expecting CGRect, finding {?={?=ff}{?=ff}} (From: Philip Dow <email@hidden>)
 >Re: Reading old NSArchiver serialization, expecting CGRect, finding {?={?=ff}{?=ff}} (From: glenn andreas <email@hidden>)
 >Re: Reading old NSArchiver serialization, expecting CGRect, finding {?={?=ff}{?=ff}} (From: Philip Dow <email@hidden>)
 >32 -> 64 bit serializations, NSNumber, int, NSInteger (From: Philip Dow <email@hidden>)
 >Re: 32 -> 64 bit serializations, NSNumber, int, NSInteger (From: Nick Zitzmann <email@hidden>)

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