Re: [Bug-wget] wget 1.12 IRI test failures on Mac OS X

[Ryan Schmidt]

On Sep 24, 2009, at 12:57, Micah Cowan wrote:

> It looks like the troubles your experiencing are due to the fact that
> the Wget tests assume that the filesystem can take any arbitrary set  
> of
> bytes, and will store them as they were given. This is apparently not
> the case for Mac OS, and I should probably have known better than to
> assume it would be a universal case. Ryan, can you please confirm  
> for me
> that this is indeed what's happening?


Basically yes. It's a feature of the HFS Plus volume format, which is  
the default volume format on Mac OS since before Mac OS X.

http://developer.apple.com/mac/library/technotes/tn/tn1150.html#HFSPlusNames

"HFS Plus stores strings fully decomposed and in canonical order."

http://developer.apple.com/mac/library/technotes/tn/tn1150.html#CanonicalDecomposition

"HFS Plus defines that Unicode strings will be stored in fully  
decomposed form, with composing characters stored in canonical order.  
The other equivalent forms are illegal in HFS Plus strings. An  
implementation must convert these equivalent forms to the fully  
decomposed form before storing the string on disk."