Re: NSControls failing to set status/label on BigEndian/64bit

[Wolfgang Lux]

Am 07.01.2021 um 14:33 schrieb Riccardo Mottola <riccardo.mottola@libero.it>:
> 
> Hi all,
> 
> 
> Wolfgang Lux wrote:
>> Yes. Changing the type you pass to the {en,de}codeValueOfObjCType methods is 
>> a, errm, not so bright idea. The types are included in the binary archives. 
>> So, trying to decode a value with a different type will give you an error 
>> (for your own safety and sanity). Trying to encode values with a different 
>> type is even worse, as you would be creating archives that cannot be read by 
>> anybody else (because they are expecting some other type). If you (have to) 
>> make such changes, be sure to introduce a new archive version and be sure to 
>> include backward compatibility code for reading the old archive format.
> 
> I had a call with Gregory yesterday.. since this is a delciate subject I made 
> a branch with a proposed initial change (as I have other controls failing, it 
> will not be the conly class affected either)
> 
> BE-64-Fixes
> 
> What do you think?

I think that introducing a new archive format to address the issue with the 
_highlightsByMask and _altStateMask attributes is a bit over the top. Either 
decoding the attributes as NSUInteger values as Fred mentioned or decoding them 
as unsigned int into a temporary variable and then copying the values from 
those temporary variable into the respective attribute would do. BTW, I don't 
consider the latter a hack. It's a perfectly sane solution for dealing with 
backward compatible archives.

Wolfgang