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Subject: bug#6707: cut is not multi byte (wide char) aware
Resent-From: Mihai Moldovan <ionic@HIDDEN>
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Date: Thu, 22 Jul 2010 20:49:13 +0200
From: Mihai Moldovan <ionic@HIDDEN>
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Hi,

I have come to notice that cut is not yet multi byte/wide char aware.

That it, you cannot use characters as delimiters, which consist of two
bytes or more in the current char set.

Simplest example:

ionic@nopileos~% echo "this=E2=82=ACis=E2=82=ACa=E2=82=ACbug=E2=82=ACtest=
" | gcut -d '=E2=82=AC' -f4
gcut: the delimiter must be a single character
Try `gcut --help' for more information.
1 [0 running job(s)] {history#1425}  20:47:43 10-07-22

BSD cut however has got no problems with that:

ionic@nopileos~% echo "this=E2=82=ACis=E2=82=ACa=E2=82=ACbug=E2=82=ACtest=
" | cut -d '=E2=82=AC' -f4
bug


(Is this even considerable as a bug, or just a "feature" in that only
one byte delimiters are allowed by default?)

Best regards,


Mihai


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Subject: bug#6707: Acknowledgement (cut is not multi byte (wide char) aware)
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Subject: bug#6707: cut is not multi byte (wide char) aware
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On 07/22/2010 12:49 PM, Mihai Moldovan wrote:
> Hi,
>=20
> I have come to notice that cut is not yet multi byte/wide char aware.

Yes, and so are a lot of the coreutils.  This is a well-known issue, and
mentioned in the TODO.  Several distros have add-on patches that add
wide char support, but to date, no one has yet submitted a patch
upstream that is both easy to maintain (doesn't needlessly duplicate big
blocks of code over char vs. wchar_t) and which doesn't penalize speed
on single-byte locales.  We've got some ideas on what is needed, and
gnulib is certainly getting closer to what we need (Bruno's work on
libunistring will be a key player in an acceptable patch), but it takes
time to pull it all together.

> (Is this even considerable as a bug, or just a "feature" in that only
> one byte delimiters are allowed by default?)

Yes, it can be considered a bug, and any extra help would be welcome.
Unfortunately, to date there has been no one willing to step forward to
scratch this itch as their highest priority.

--=20
Eric Blake   eblake@HIDDEN    +1-801-349-2682
Libvirt virtualization library http://libvirt.org


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Message sent to owner <at> debbugs.gnu.org, bug-coreutils@HIDDEN:

Subject: bug#6707: cut is not multi byte (wide char) aware
Resent-From: =?UTF-8?Q?P=C3=A1draig?= Brady <P@HIDDEN>
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To: Mihai Moldovan <ionic@HIDDEN>
Cc: 6707 <at> debbugs.gnu.org
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Date: Fri, 23 Jul 2010 00:24:42 +0100
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On 22/07/10 19:49, Mihai Moldovan wrote:
> Hi,
> 
> I have come to notice that cut is not yet multi byte/wide char aware.
> 
> That it, you cannot use characters as delimiters, which consist of two
> bytes or more in the current char set.
> 
> Simplest example:
> 
> ionic@nopileos~% echo "this€is€a€bug€test" | gcut -d '€' -f4
> gcut: the delimiter must be a single character
> Try `gcut --help' for more information.
> 1 [0 running job(s)] {history#1425}  20:47:43 10-07-22
> 
> BSD cut however has got no problems with that:
> 
> ionic@nopileos~% echo "this€is€a€bug€test" | cut -d '€' -f4
> bug
> 
> 
> (Is this even considerable as a bug, or just a "feature" in that only
> one byte delimiters are allowed by default?)

We're working on it.
Something is coming soon.

cheers,
Pádraig.

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severity 6707 wishlist
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severity 6707 wishlist
retitle 6707 multibyte: cut is not multi byte (wide char) aware

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