Re: [Pyobjc-dev] In and out of NSData

[Ronald O. <ous...@ci...>]

On Tuesday, Jan 7, 2003, at 16:30 Europe/Amsterdam, Bob Ippolito wrote:

> I updated to latest CVS.. it seems that you may now initialize 
> NSData/NSMutableData with a python string or an array, but it breaks 
> for big ones.
>
> >>> from Foundation import *
> >>> import array
> >>> bytes = array.array('b', 'abcdef')
> >>> NSData.alloc().initWithBytes_length_(bytes, len(bytes))
> <a07e>
> >>> NSMutableData.alloc().initWithBytes_length_(bytes, len(bytes))
> <a07eda48 00000001 00000000 00000054 007db1e0 00000000 00000000 
> 00000001 76304034 3a385e76 31324931 36000001 76304034 3a384931 
> 32000000 00010002 76>
> >>> bytes = array.array('b', 'abcdef' * 1000)
> >>> NSData.alloc().initWithBytes_length_(bytes, len(bytes))
> Segmentation fault
>

You can work around this by using 'NSData.dataWithBytes_length_' for 
now. There seems to be a problem with reference counts (based on a 
quick glance at a traceback in gdb), the segfault is caused by the 
release of 'self' when deallocating the bound method 
'initWithBytes_length_', and this self doesn't have a valid 'isa' 
pointer.

Ronald