| Re: md5 checksum of a img file, or get the value of 100th byte |
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Group: gnu.emacs.help · Group Profile
Author: Ted ZlatanovTed Zlatanov Date: Jun 6, 2008 15:45
On Fri, 06 Jun 2008 23:07:11 +0300 Eli Zaretskii gnu.org> wrote:
>> From: Ted Zlatanov lifelogs.com>
>> Date: Fri, 06 Jun 2008 13:55:18 -0500
>> EZ> ??? insert-file-contents already can read only a portion of a file.
EZ> See its doc string.
>>
>> I know about that. I'd like to be able to open a 1 GB file in Emacs and
>> view just a piece at a time, in a sliding window. I am not aware of
>> functionality to do this
EZ> For viewing such a file, it should be easy to write some Lisp using
EZ> insert-file-contents to read a file one chunk at a time.
That's what I meant, but it's definitely not easy. Emacs assumes it can
just copy all data into the kill ring, for instance. I couldn't write
such a node though I'd appreciate it very much.
EZ> For editing, I submit that there should be no reason to edit such
EZ> large files.
Maybe 10 years ago that was true. Today I see huge (over 300 MB) files
very often (as a programmer and as a sysadmin). Logs of all sorts, for
instance, and database dumps.
It gets annoying to use less, split, grep, and Perl to get things done
when in Emacs it would have been a few quick commands. But I cope.
Ted
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