Eric Chatonet wrote:
Hi Dave,
You are perfectly right: I missed this one.
So a reliable function could be:
getting close ... but not quite there yet, because of the issue of comma
being an allowed character in file names.
(I don't know if this applies to Mac - but I'm 99% sure it will, since
this is a relatively common thing to do in Unix, so I'd expect the OSX
file system to allow it).
If the Mac doesn't allow this, then your function is OK - but beware of
the problem for any other operation you do on "the detailed files".
If Mac does allow commas in file names, then it causes two problems.
The first is easy - but rather dangerous. You cannot use "item 11" for
the file creator - you should alway use "item -1". The same applies to
all the items returned - you should use "item -10" for file size, rather
than "item 2", etc.
However, this doesn't work as it should on Windows.
The docs say
* The file's access permissions
* The file's creator and file type (Mac OS and OS X only)
Any attribute that is not supported on the current system is reported
as "0" (zero).
But in fact on Windows, the creator and file type (not supported) are
set to empty, not "0".
This is a real pain, because it means that you always have an empty last
item - so the number of items is 10.
[Does the Mac ever return empty Creator and file type ?]
Therefore you need to add a check for the last character being comma,
and if it is append some safe string (e.g. a space), before using the
negative index numbers.
The second problem is rather more obscure - but if we want to claim to
work in 100% of the cases, not 99.99..% we should cover it.
I believe you cannot use a "filter" to match any arbitrary filename you
might be given.
filter ... pFileName & ",*"
fails because "name" and "name,date" both match pFileName = "name"
You might think you could depend on the fact that the files are
alphabetic to always get the one you want first (I certainly did when I
started writing this email), but you can't. Using the filename "a,11"
will falsely match the file "a" if it happens to be 11 bytes long (or
110, or 11234, ...). Since "a" comes before "a,11" it will be the first
one found.
You could try (I did !!) using the trick I saw from Richard a couple of
weeks ago, using a complex filter expression to ensure the right number
of items - e.g.
filter ... pFileName & ",*,*,*,*,*,*,*,*,*,*"
but that also fails the "a,11" case as above.
So I think you need to loop through them, checking the file name. But
you cannot do as Dave suggested, and compare item 1 of each line against
the file name, because that would fail to match a filename containing a
comma that should match.
You instead need to compare "item 1 to -11" (once you've done the above
check for empty last item).
So we finish up with what I *think* is a truly reliable version
function CreatorAndType pFilePath
local tDefaultFolder,tFile,tCreatorType, theLine, L, tNewFiles, tName
-----
if the platform <> "MacOs" then return "Error: filetype not supported"
put the defaultFolder into tDefaultFolder
set the itemdel to slash
set the defaultFolder to item 1 to -2 of pFilePath
put urlDecode(the detailed files) into tFile
put empty into tNewFiles
put item -1 of pFilePath into tName
set the itemDel to comma
repeat for each line L in tFile
put L into theLine
if the last char of theLine = comma then put space after theLine
if item 1 to -11 of theLine = tName then put L & cr after tNewFiles
end repeat
put tNewFiles into tFile
-- put tFile & cr after msg
if tFile = empty then return "Error: could not find file"
set the defaultFolder to tDefaultFolder
return tFile
end CreatorAndType
Le 30 juil. 05 à 13:07, Dave Cragg a écrit :
On 30 Jul 2005, at 10:40, Eric Chatonet wrote:
Hi Brian,
As the files function returns a list sorted by alphabetical order,
I don't think it's necessary.
But, for example, if you were looking for a file named "mend.png"
and there was a file named "amend.png" in the folder, you'd find
"amend.png".
A bit cumbersome, but when I've done this, I've repeated through all
lines in the detailed files and done a match on the first item in each.
Cheers
dave
Best Regards from Paris,
Eric Chatonet.
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