[Pythonmac-SIG] AppleEvents in MacPython 2.3?

[Larry Meyn]

Jack,

Thanks! This should should work great for my application. Although I'm 
wanting paths to new files, I'm only placing them in existing 
directories and your function can give me robust OS 9 paths for those.

Larry

On Friday, August 15, 2003, at 02:58 PM, Jack Jansen wrote:
>
> This will work for 90% of the paths, but fail on all sorts of 
> exceptional
> ones. Some of the problems:
> - It doesn't handle ':' in unix filenames (should be converted to /)
> - It only handles 7-bit ascii (unix filenames use utf8 encoding, OS9 
> paths
>   use MacRoman or another encoding)
> - It will fail for filenames longer than 32 (or 31) characters
>
>
> What you should do is create an FSSpec for the file, and recursively 
> get
> the pathname components from it. Here it is:
>
> def makeOS9abspath(path):
> 	"""Returns an ":" delimited, OS 9 style absolute path.
> 	"""
> 	import Carbon.File, os.path
> 	
> 	rv = []
> 	fss = Carbon.File.FSSpec(path)
> 	while 1:
> 		vrefnum, dirid, filename = fss.as_tuple()
> 		rv.insert(0, filename)
> 		if dirid == 1: break
> 		fss = Carbon.File.FSSpec((vrefnum, dirid, ""))
> 	if len(rv) == 1:
> 		rv.append('')
> 	return ':'.join(rv)
>
> This one still has a problem in that it will not work if path doesn't 
> yet
> exist, on OSX FSSpec(path) goes via FSRef's, and these are only 
> defined on
> existing files. The bad news is that I don't think there is a 100% 
> failsafe
> way to create an OS9 path for a nonexisting item on OSX (given a UTF8 
> unix
> path).
> --
> - Jack Jansen        <Jack.Jansen at oratrix.com>        
> http://www.cwi.nl/~jack -
> - If I can't dance I don't want to be part of your revolution -- Emma 
> Goldman -
>
>
> _______________________________________________
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>
>


Larry Meyn
Aerospace Operations Modeling Office

M/S 210-10                      Phone:  (650) 604-5038
NASA Ames Research Center       Fax:    (650) 604-0222
Moffett Field, CA 94035-1000    E-mail: Larry.A.Meyn at nasa.gov
                                 E-Fax:  (425) 944-5526 sent via e-mail
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