parsing a large text file

• Subject: parsing a large text file
• From: email@hidden
• Date: Thu, 6 Jul 2006 13:52:19 -0600
• Delivered-to: email@hidden
• Delivered-to: email@hidden

I need help parsing a large text file.
I need to examine the file one line at a time.
I make changes to it and then write it back out as a text file.

In the past I have put it all into one variable with:

set datafileref to (choose file with prompt "Choose the file:")
set file_data to (read datafileref as {text} using delimiter return)

But it doesn't work on a 32MB text file.

I can read the first line with:

set file_data to (read datafileref as {text} until return)

But how do I read the next line? ... and the next, etc., etc.?
--
DOS

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