On Mar 21, 2012, at 10:49 PM, Seth Willits wrote: > On Mar 21, 2012, at 6:00 PM, Grandinetti Philip wrote: > >> I am confused about different behavior I'm seeing with CFData and NSData. >> If I create a new project in XCode 4.3.1 as a Core Foundation command line >> tool, and enter the code below… > > You've triggered a bug! > > And it took me a long time, but I found it. The bug is in > __CFDataRoundUpCapacity, and has to do with a bad (1 << ….) which should be > (1L << …). > > > I'll file a report.
Filed as 11097403. And yeah, setting the length to anything > 0 when the data is created will avoid the bug because the CFData is not "growable", and CFDataSetLength is handled a little different for growable CFDatas vs fixed-length mutable ones. I'm not sure what [NSMutableData dataWithCapacity:0] does, but it's not a simple call to CFDataCreateMutable(kCFAllocatorDefault, 0) which is why it behaves differently as well. -- Seth Willits _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
