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Re: preflighting a file
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Re: preflighting a file


  • Subject: Re: preflighting a file
  • From: Shane Stanley <email@hidden>
  • Date: Tue, 19 Feb 2002 19:56:04 +1100

On 19/2/02 6:34 PM +1000, Emmanuel, email@hidden, wrote:

> At 4:45 AM +0100 19/2/02, Shane Stanley wrote:
>
>>> set theFile to open for access (choose file)
>>> set theData to read theFile
>>> close access theFile
>>> if "CalGray" is in theData then display dialog "I wouldn't if I were you..."
>>>
>>> (Accepting of course that limiting the read command - with something like
>>> 'for 4024' - might still be required where large files may be involved.)
>>
>> As long as theData is never more than 32K, that should work.
>
> Sorry for probably asking the obvious, but I do not understand what it is
> that will not work beyond 32K.
>
> Only the method with the AppleScript's text item delimiters may break for
> long strings (specially if they are full of "Calgray"'s!).

The "is in" comparison fails with strings greater than 32K. Run this:

set n to 10
set x to "abcdefghijklmnop"
repeat n times
set x to x & x
end repeat
{count of x, "a" is in x}

then change n to 11 and run it again.

Yes?

--
Shane Stanley, email@hidden
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  • Follow-Ups:
    • Re: preflighting a file
      • From: Deivy Petrescu <email@hidden>
    • Re: preflighting a file
      • From: Emmanuel <email@hidden>
References: 
 >Re: preflighting a file (From: Emmanuel <email@hidden>)

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