Re: Properly comparing file NSURLs for equality?
Re: Properly comparing file NSURLs for equality?
- Subject: Re: Properly comparing file NSURLs for equality?
- From: Douglas Davidson <email@hidden>
- Date: Fri, 27 May 2011 16:57:17 -0700
On May 27, 2011, at 4:45 PM, James Walker wrote:
> On 5/27/2011 4:35 PM, Jens Alfke wrote:
>
>> Comparing paths has its own set of pitfalls: even if you’re not
>> concerned about symlinks, there’s case-insensitivity to deal with. I’m
>> not sure what the best way is to deal with that. You could canonicalize
>> each path; or you could convert each URL to an FSRef and then compare
>> those for equality.
>
> If you were going to compare FSRefs (FSCompareFSRefs), you wouldn't need to convert to a path, just use CFURLGetFSRef via toll-free bridging.
It shouldn't be necessary to go to FSRefs for this now that we have resource properties such as NSURLFileResourceIdentifierKey/kCFURLFileResourceIdentifierKey. For other usages of FSRefs, consider file reference URLs instead.
Douglas Davidson
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