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Subject: bug#9680: [Bug 868747] Re: fmt -f <unlimited> should be supported
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From: Jim Meyering <jim@HIDDEN>
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Date: Thu, 06 Oct 2011 08:39:37 +0200
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jimav wrote:
> Strictly speaking this is an enhancement request.
>
> fmt imposes an artificial limit on the maximum output line length
> controlled by the -f option, which prevents using this tool to "join"
You meant -w, not -f, throughout.
Thanks for the suggestion. Note that the code has this:
/* Size of paragraph buffer, in words and characters. Longer paragraphs
are handled neatly (cf. flush_paragraph()), so long as these values
are considerably greater than required by the width. These values
cannot be extended indefinitely: doing so would run into size limits
and/or cause more overflows in cost calculations. FIXME: Remove these
arbitrary limits. */
#define MAXWORDS 1000
#define MAXCHARS 5000
where MAXCHARS/2 specifies the largest width.
I.e., fmt -w 2500 works, but not 2501.
We agree that there should not be such a limit.
But the internals of fmt are not pretty -- significantly less
so than most other parts of the coreutils, and as the comment says
we cannot easily increase them arbitrarily.
In the mean time what can you do if you want truly unlimited-length
paragraphs? It's not trivial since you want to retain paragraph delimiters.
This perl command should do the trick.
It processes your input a paragraph at a time, replacing each newline
(and spaces before/after) with a single space:
perl -00ple 's/\s*\n\s*/ /g'
E.g., given this input,
1
2
3
4
1
2
3
4
5
It prints this:
$ (seq 4; echo; seq 5) | perl -00ple 's/\s*\n\s*/ /g'
1 2 3 4
1 2 3 4 5
It doesn't preserve indentation, but if you're just going to
paste it into libreoffice, that should be fine.
I've Cc'd the upstream bug-tracker, so we'll have a bug number there, too.
Content-Disposition: inline Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Mailer: MIME-tools 5.427 (Entity 5.427) Content-Type: text/plain; charset=utf-8 X-Loop: help-debbugs@HIDDEN From: help-debbugs@HIDDEN (GNU bug Tracking System) To: Jim Meyering <jim@HIDDEN> Subject: bug#9680: Acknowledgement ([Bug 868747] Re: fmt -f <unlimited> should be supported) Message-ID: <handler.9680.B.13178832012861.ack <at> debbugs.gnu.org> References: <87zkhe1v4m.fsf@HIDDEN> X-Gnu-PR-Message: ack 9680 X-Gnu-PR-Package: coreutils Reply-To: 9680 <at> debbugs.gnu.org Date: Thu, 06 Oct 2011 06:40:03 +0000 Thank you for filing a new bug report with debbugs.gnu.org. This is an automatically generated reply to let you know your message has been received. Your message is being forwarded to the package maintainers and other interested parties for their attention; they will reply in due course. Your message has been sent to the package maintainer(s): bug-coreutils@HIDDEN If you wish to submit further information on this problem, please send it to 9680 <at> debbugs.gnu.org. Please do not send mail to help-debbugs@HIDDEN unless you wish to report a problem with the Bug-tracking system. --=20 9680: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D9680 GNU Bug Tracking System Contact help-debbugs@HIDDEN with problems
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