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Apple binar property lost format

From: Fred Kiefer
Subject: Apple binar property lost format
Date: Sun, 08 May 2005 19:42:39 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050414

I did just commit the writing of property lists in the Apple binary format. This should make it easier to write NIB files that may be used on Apple systems. But of course we will need full keyed encoding first.

There are two known limitations to this implementation. First NSNumber objects containing char values with 0 or 1 are treated as NO and YES. This wont make much of a difference for the applications reading this data, but is not strictly correct. I could not find any way to handle this better, apart from checking for an internal class name. After all this is still a lot better than the XML output format code, which treats all char numbers as boolean.

The other limitation is that when reading in a binary property list and storing it again in the same format, the number of objects decreses. I am not sure what is causing this, it also only happens with big NIB files. My only idea is that my code in [BinaryPLGenerator indexForObject:] removes duplicate occurences of objects. Maybe Apple stores them each anew. If somebody can confirm this, I would adjust my code. But then the code would no longer be able to handle recursive property list.


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