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Re: Fixed width record mode?

From: Pascal J. Bourguignon
Subject: Re: Fixed width record mode?
Date: Thu, 02 Jun 2016 15:21:09 -0000
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

Sean LeBlanc <address@hidden> writes:

> I'm just wondering if there is any mode in Emacs in which you could
> supply the "schema" of a fixed-width record format and view, possibly
> edit, files of that type?

To edit files of record, there's forms-mode.

It uses a separator bound to forms-field-sep to separate the various
fields in a record, and records are lines as per forward-line as used in

However, it has a set of filter hooks: forms-read-file-filter
forms-write-file-filter forms-new-record-filter
forms-modified-record-filter, that could be used to transform between a
fixed-length record to a fields with separator line and back.  Those
hooks work on the whole buffer, so they would be able to insert lines
in addition to field separators too.

__Pascal Bourguignon__       
“The factory of the future will have only two employees, a man and a
dog. The man will be there to feed the dog. The dog will be there to
keep the man from touching the equipment.” -- Carl Bass CEO Autodesk

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