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From: minow@mountn.dec.com (Martin Minow)
Newsgroups: comp.sys.mac.programmer
Subject: Re: textEdit 32000 char barrier - advice sought
Message-ID: <2062@mountn.dec.com>
Date: 17 Dec 90 15:25:42 GMT
References: <32576.276B8C23@stjhmc.fidonet.org>
Reply-To: minow@mountn.UUCP (Martin Minow)
Organization: Digital Equipment Corporation
Lines: 29

In article <32576.276B8C23@stjhmc.fidonet.org>
Lawson.English@p88.f15.n300.z1.fidonet.org (Lawson English) writes:
>audit038@spacm1.spac.spc.com writes in a message to All
>
>A> I need the ability to scroll thru more than 32000 characters 
>A> in textEdit [...] Anyone have ideas on this or know where I
>can find source code?
>
>MacTutor recently had an article (with sources) to do this by replacing the
>TEdit calls with ones that handle up to 2^32 bytes. I can't find it offhand,
>but I believe that the author frequents this board, so he will probably answer
>in depth (if not, I'll find the mag and post a reference).

The article appeared in Feb + March 1990 MacTutor.  It will probably
re-appear in their year-end collection.

Rather than type the code in and debug it (and discover that it
intentionally does not include data-management algorithms), I would
recommend that you look at one of the commercial products (these are
advertised in MacTutor).

These have the advantage of support (if something goes wrong, the
company has a certain obligation to fix it) and a better data storage
mechanism.  The code I wrote handles large file sizes very slowly.
It is probably most useful as an example of what you have to do to
implement a minimal text editor.

Martin Minow
minow@bolt.enet.dec.com