From vseloved at gmail.com  Wed Aug  4 14:07:18 2010
From: vseloved at gmail.com (Vsevolod Dyomkin)
Date: Wed, 4 Aug 2010 17:07:18 +0300
Subject: [babel-devel] question about #\Nul char and Unicode
Message-ID: <AANLkTinN6KxLsHHV1ZHAW=o-jh73Q8GkkgUWcUFkcAug@mail.gmail.com>

Hi,

I'm stuck with a problem:  I'm using CL-ZMQ, that in turn uses CFFI, that in
turn uses BABEL for such tasks as FOREIGN-STRING-TO-LISP conversion.
There seams to be a problem with 0 (#\Nul) characters for such strings,
which can be seen below:

Illegal :UTF-8 character starting at position 328.
   [Condition of type BABEL-ENCODINGS:INVALID-UTF8-CONTINUATION-BYTE]

Restarts:
...

Backtrace:
  0: ((LAMBDA (BABEL-ENCODINGS::SRC BABEL-ENCODINGS::START
BABEL-ENCODINGS::END BABEL-ENCODINGS::DEST BABEL-ENCODINGS::D-START)) ..)
  1: (CFFI:FOREIGN-STRING-TO-LISP #.(SB-SYS:INT-SAP #X0808E13C))[:EXTERNAL]
...

The translated string in the current example is this:
#(#\5 #\4 #\c #\6 #\7 #\5 #\5 #\b #\- #\9 #\6 #\2 #\8 #\- #\4 #\0 #\a #\4
#\- #\9 #\a #\2 #\d #\- #\c #\c #\8 #\2 #\a #\8 #\1 #\6 #\3 #\4 #\5 #\e #\
#\1 #\8 #\  #\/ #\h #\a #\n #\d #\l #\e #\r #\t #\e #\s #\t #\  #\2 #\6 #\0
#\Space #\{ #\" #\P #\A #\T #\H #\" #\Space #\" #\/ #\h #\a #\n #\d #\l #\e
#\r #\t #\e #\s #\t #\" #\, #\" #\M #\E #\T #\H #\O #\D #\" #\Space #\" #\G
#\E #\T #\" #\, #\" #\V #\E #\R #\S #\I #\O #\N #\" #\Space #\" #\H #\T #\T
#\P #\/ #\1 #\. #\1 #\" #\, #\" #\U #\R #\I #\" #\Space #\" #\/ #\h #\a #\n
#\d #\l #\e #\r #\t #\e #\s #\t #\" #\, #\" #\P #\A #\T #\T #\E #\R #\N #\"
#\Space #\" #\/ #\h #\a #\n #\d #\l #\e #\r #\t #\e #\s #\t #\" #\, #\" #\A
#\c #\c #\e #\p #\t #\" #\Space #\" #\* #\/ #\* #\" #\, #\" #\H #\o #\s #\t
#\" #\Space #\" #\l #\o #\c #\a #\l #\h #\o #\s #\t #\Space #\6 #\7 #\6 #\7
#\" #\, #\" #\U #\s #\e #\r #\- #\A #\g #\e #\n #\t #\" #\Space #\" #\c #\u
#\r #\l #\/ #\7 #\. #\2 #\0 #\. #\0 #\  #\( #\i #\4 #\8 #\6 #\- #\p #\c #\-
#\l #\i #\n #\u #\x #\- #\g #\n #\u #\) #\  #\l #\i #\b #\c #\u #\r #\l #\/
#\7 #\. #\2 #\0 #\. #\0 #\  #\O #\p #\e #\n #\S #\S #\L #\/ #\0 #\. #\9 #\.
#\8 #\n #\  #\z #\l #\i #\b #\/ #\1 #\. #\2 #\. #\3 #\. #\4 #\  #\l #\i #\b
#\i #\d #\n #\/ #\1 #\. #\1 #\5 #\  #\l #\i #\b #\s #\s #\h #\2 #\/ #\1 #\.
#\2 #\. #\4 #\" #\} #\, #\0 #\Space #\, #\n #\S #\S #\L #\/ #\0 #\. #\Nul
#\Nul)

Maybe, someone here can explain, why this 0-characters are not recognized as
proper utf-8 ones?

Thanks!
Vsevolod
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From luismbo at gmail.com  Wed Aug  4 19:02:48 2010
From: luismbo at gmail.com (=?ISO-8859-1?Q?Lu=EDs_Oliveira?=)
Date: Wed, 4 Aug 2010 20:02:48 +0100
Subject: [babel-devel] question about #\Nul char and Unicode
In-Reply-To: <AANLkTinN6KxLsHHV1ZHAW=o-jh73Q8GkkgUWcUFkcAug@mail.gmail.com>
References: <AANLkTinN6KxLsHHV1ZHAW=o-jh73Q8GkkgUWcUFkcAug@mail.gmail.com>
Message-ID: <AANLkTimq7LJTuu4vJZWqMZTVXunEH9AN61kxn0Fa71tm@mail.gmail.com>

On Wed, Aug 4, 2010 at 3:07 PM, Vsevolod Dyomkin <vseloved at gmail.com> wrote:
> Maybe, someone here can explain, why this 0-characters are not recognized as
> proper utf-8 ones?

Seems to work for me. Can you come up with a short reproducible example?

CL-USER> (defparameter *array* #(#\5 #\4 #\c #\6 #\7 #\5 #\5 #\b #\-
#\9 #\6 #\2 #\8 #\- #\4 #\0 #\a #\4 #\- #\9 #\a #\2 #\d #\- #\c #\c
#\8 #\2 #\a #\8 #\1 #\6 #\3 #\4 #\5 #\e #\  #\1 #\8 #\  #\/ #\h #\a
#\n #\d #\l #\e #\r #\t #\e #\s #\t #\  #\2 #\6 #\0 #\Space #\{ #\"
#\P #\A #\T #\H #\" #\Space #\" #\/ #\h #\a #\n #\d #\l #\e #\r #\t
#\e #\s #\t #\" #\, #\" #\M #\E #\T #\H #\O #\D #\" #\Space #\" #\G
#\E #\T #\" #\, #\" #\V #\E #\R #\S #\I #\O #\N #\" #\Space #\" #\H
#\T #\T #\P #\/ #\1 #\. #\1 #\" #\, #\" #\U #\R #\I #\" #\Space #\"
#\/ #\h #\a #\n #\d #\l #\e #\r #\t #\e #\s #\t #\" #\, #\" #\P #\A
#\T #\T #\E #\R #\N #\" #\Space #\" #\/ #\h #\a #\n #\d #\l #\e #\r
#\t #\e #\s #\t #\" #\, #\" #\A #\c #\c #\e #\p #\t #\" #\Space #\"
#\* #\/ #\* #\" #\, #\" #\H #\o #\s #\t #\" #\Space #\" #\l #\o #\c
#\a #\l #\h #\o #\s #\t #\Space #\6 #\7 #\6 #\7 #\" #\, #\" #\U #\s
#\e #\r #\- #\A #\g #\e #\n #\t #\" #\Space #\" #\c #\u #\r #\l #\/
#\7 #\. #\2 #\0 #\. #\0 #\  #\( #\i #\4 #\8 #\6 #\- #\p #\c #\- #\l
#\i #\n #\u #\x #\- #\g #\n #\u #\) #\  #\l #\i #\b #\c #\u #\r #\l
#\/ #\7 #\. #\2 #\0 #\. #\0 #\  #\O #\p #\e #\n #\S #\S #\L #\/ #\0
#\. #\9 #\. #\8 #\n #\  #\z #\l #\i #\b #\/ #\1 #\. #\2 #\. #\3 #\.
#\4 #\  #\l #\i #\b #\i #\d #\n #\/ #\1 #\. #\1 #\5 #\  #\l #\i #\b
#\s #\s #\h #\2 #\/ #\1 #\. #\2 #\. #\4 #\" #\} #\, #\0 #\Space #\,
#\n #\S #\S #\L #\/ #\0 #\. #\Nul #\Nul))
*ARRAY*
CL-USER> (cffi:with-foreign-string (fs (coerce *array* 'string)
:encoding :utf-8)
           (cffi:foreign-string-to-lisp fs :encoding :utf-8))
"54c6755b-9628-40a4-9a2d-cc82a816345e 18 /handlertest 260 {\"PATH\"
\"/handlertest\",\"METHOD\" \"GET\",\"VERSION\" \"HTTP/1.1\",\"URI\"
\"/handlertest\",\"PATTERN\" \"/handlertest\",\"Accept\"
\"*/*\",\"Host\" \"localhost 6767\",\"User-Agent\" \"curl/7.20.0
(i486-pc-linux-gnu) libcurl/7.20.0 OpenSSL/0.9.8n zlib/1.2.3.4
libidn/1.15 libssh2/1.2.4\"},0 ,nSSL/0."
328

Thanks,

-- 
Lu?s Oliveira
http://r42.eu/~luis/



From luismbo at gmail.com  Wed Aug  4 21:35:02 2010
From: luismbo at gmail.com (=?ISO-8859-1?Q?Lu=EDs_Oliveira?=)
Date: Wed, 4 Aug 2010 22:35:02 +0100
Subject: [babel-devel] question about #\Nul char and Unicode
In-Reply-To: <AANLkTik_eK5bh9GwJudZoqRfsDn+wUsd6xuOwv-4dh7G@mail.gmail.com>
References: <AANLkTinN6KxLsHHV1ZHAW=o-jh73Q8GkkgUWcUFkcAug@mail.gmail.com> 
	<AANLkTimq7LJTuu4vJZWqMZTVXunEH9AN61kxn0Fa71tm@mail.gmail.com> 
	<AANLkTik_eK5bh9GwJudZoqRfsDn+wUsd6xuOwv-4dh7G@mail.gmail.com>
Message-ID: <AANLkTikXgJKAv6AMq9DY4BjHHL_F-=vJ2odDg_JJiMwA@mail.gmail.com>

Hello Vsevolod,

On Wed, Aug 4, 2010 at 9:42 PM, Vsevolod Dyomkin <vseloved at gmail.com> wrote:
> It's also worth mentioning, that I'm using babel-0.3.

Perhaps you should try with the development versions of babel and
CFFI. Let me know if that helps.

Cheers,

-- 
Lu?s Oliveira
http://r42.eu/~luis/



From vseloved at gmail.com  Wed Aug  4 20:42:03 2010
From: vseloved at gmail.com (Vsevolod Dyomkin)
Date: Wed, 4 Aug 2010 23:42:03 +0300
Subject: [babel-devel] question about #\Nul char and Unicode
In-Reply-To: <AANLkTimq7LJTuu4vJZWqMZTVXunEH9AN61kxn0Fa71tm@mail.gmail.com>
References: <AANLkTinN6KxLsHHV1ZHAW=o-jh73Q8GkkgUWcUFkcAug@mail.gmail.com> 
	<AANLkTimq7LJTuu4vJZWqMZTVXunEH9AN61kxn0Fa71tm@mail.gmail.com>
Message-ID: <AANLkTik_eK5bh9GwJudZoqRfsDn+wUsd6xuOwv-4dh7G@mail.gmail.com>

Lu?s, thanks for the answer!

The issue is connected with my recent experiment with creating CL bindings
to the upcoming mongrel2 web-server.  And it arises only sometimes.

 You can see the initial variant at http://github.com/vseloved/cl-mongrel2.
If you are willing to dive in and spend some time, try to run the example
code in http://github.com/vseloved/cl-mongrel2/blob/master/example.lisp

It will also require you to install and run mongrel2 itself (see
http://mongrel2.org/doc/tip/docs/manual/book.wiki for details), which will
in turn require to setup a working Python environment (if you don't have one
already, obviously).  All the other instructions are in example.lisp.  If
something is unclear, feel free to write me.

It's also worth mentioning, that I'm using babel-0.3.

Looking forward for the results,
Vsevolod

On Wed, Aug 4, 2010 at 10:02 PM, Lu?s Oliveira <luismbo at gmail.com> wrote:

> On Wed, Aug 4, 2010 at 3:07 PM, Vsevolod Dyomkin <vseloved at gmail.com>
> wrote:
> > Maybe, someone here can explain, why this 0-characters are not recognized
> as
> > proper utf-8 ones?
>
> Seems to work for me. Can you come up with a short reproducible example?
>
> CL-USER> (defparameter *array* #(#\5 #\4 #\c #\6 #\7 #\5 #\5 #\b #\-
> #\9 #\6 #\2 #\8 #\- #\4 #\0 #\a #\4 #\- #\9 #\a #\2 #\d #\- #\c #\c
> #\8 #\2 #\a #\8 #\1 #\6 #\3 #\4 #\5 #\e #\  #\1 #\8 #\  #\/ #\h #\a
> #\n #\d #\l #\e #\r #\t #\e #\s #\t #\  #\2 #\6 #\0 #\Space #\{ #\"
> #\P #\A #\T #\H #\" #\Space #\" #\/ #\h #\a #\n #\d #\l #\e #\r #\t
> #\e #\s #\t #\" #\, #\" #\M #\E #\T #\H #\O #\D #\" #\Space #\" #\G
> #\E #\T #\" #\, #\" #\V #\E #\R #\S #\I #\O #\N #\" #\Space #\" #\H
> #\T #\T #\P #\/ #\1 #\. #\1 #\" #\, #\" #\U #\R #\I #\" #\Space #\"
> #\/ #\h #\a #\n #\d #\l #\e #\r #\t #\e #\s #\t #\" #\, #\" #\P #\A
> #\T #\T #\E #\R #\N #\" #\Space #\" #\/ #\h #\a #\n #\d #\l #\e #\r
> #\t #\e #\s #\t #\" #\, #\" #\A #\c #\c #\e #\p #\t #\" #\Space #\"
> #\* #\/ #\* #\" #\, #\" #\H #\o #\s #\t #\" #\Space #\" #\l #\o #\c
> #\a #\l #\h #\o #\s #\t #\Space #\6 #\7 #\6 #\7 #\" #\, #\" #\U #\s
> #\e #\r #\- #\A #\g #\e #\n #\t #\" #\Space #\" #\c #\u #\r #\l #\/
> #\7 #\. #\2 #\0 #\. #\0 #\  #\( #\i #\4 #\8 #\6 #\- #\p #\c #\- #\l
> #\i #\n #\u #\x #\- #\g #\n #\u #\) #\  #\l #\i #\b #\c #\u #\r #\l
> #\/ #\7 #\. #\2 #\0 #\. #\0 #\  #\O #\p #\e #\n #\S #\S #\L #\/ #\0
> #\. #\9 #\. #\8 #\n #\  #\z #\l #\i #\b #\/ #\1 #\. #\2 #\. #\3 #\.
> #\4 #\  #\l #\i #\b #\i #\d #\n #\/ #\1 #\. #\1 #\5 #\  #\l #\i #\b
> #\s #\s #\h #\2 #\/ #\1 #\. #\2 #\. #\4 #\" #\} #\, #\0 #\Space #\,
> #\n #\S #\S #\L #\/ #\0 #\. #\Nul #\Nul))
> *ARRAY*
> CL-USER> (cffi:with-foreign-string (fs (coerce *array* 'string)
> :encoding :utf-8)
>           (cffi:foreign-string-to-lisp fs :encoding :utf-8))
> "54c6755b-9628-40a4-9a2d-cc82a816345e 18 /handlertest 260 {\"PATH\"
> \"/handlertest\",\"METHOD\" \"GET\",\"VERSION\" \"HTTP/1.1\",\"URI\"
> \"/handlertest\",\"PATTERN\" \"/handlertest\",\"Accept\"
> \"*/*\",\"Host\" \"localhost 6767\",\"User-Agent\" \"curl/7.20.0
> (i486-pc-linux-gnu) libcurl/7.20.0 OpenSSL/0.9.8n zlib/1.2.3.4
> libidn/1.15 libssh2/1.2.4\"},0 ,nSSL/0."
> 328
>
> Thanks,
>
> --
> Lu?s Oliveira
> http://r42.eu/~luis/ <http://r42.eu/%7Eluis/>
>
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From vseloved at gmail.com  Fri Aug  6 11:58:43 2010
From: vseloved at gmail.com (Vsevolod Dyomkin)
Date: Fri, 6 Aug 2010 14:58:43 +0300
Subject: [babel-devel] question about #\Nul char and Unicode
In-Reply-To: <AANLkTikXgJKAv6AMq9DY4BjHHL_F-=vJ2odDg_JJiMwA@mail.gmail.com>
References: <AANLkTinN6KxLsHHV1ZHAW=o-jh73Q8GkkgUWcUFkcAug@mail.gmail.com> 
	<AANLkTimq7LJTuu4vJZWqMZTVXunEH9AN61kxn0Fa71tm@mail.gmail.com> 
	<AANLkTik_eK5bh9GwJudZoqRfsDn+wUsd6xuOwv-4dh7G@mail.gmail.com> 
	<AANLkTikXgJKAv6AMq9DY4BjHHL_F-=vJ2odDg_JJiMwA@mail.gmail.com>
Message-ID: <AANLkTik3ZLYT2=YJXFePoyG9Ynknh-f82bmVCZZqHjXg@mail.gmail.com>

Hello Lu?s,

after some more examination I've discovered, that the error really was not
connected with Babel, but rather with some "impedance mismatch" between CFFI
and ZMQ: CFFI currently is able to support only null-terminated strings,
while ZMQ operates in blobs, so TRANSLATE-FROM-FOREIGN was fed with the
data, it was not ready to handle.

I've prepared a patch to CFFI, that can handle this situation (additional
TRANSLATE- method for string blobs of known size) and will soon send it, if
I no better solution will be found.

Best regards,
Vsevolod


On Thu, Aug 5, 2010 at 12:35 AM, Lu?s Oliveira <luismbo at gmail.com> wrote:

> Hello Vsevolod,
>
> On Wed, Aug 4, 2010 at 9:42 PM, Vsevolod Dyomkin <vseloved at gmail.com>
> wrote:
> > It's also worth mentioning, that I'm using babel-0.3.
>
> Perhaps you should try with the development versions of babel and
> CFFI. Let me know if that helps.
>
> Cheers,
>
> --
> Lu?s Oliveira
> http://r42.eu/~luis/ <http://r42.eu/%7Eluis/>
>
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From luismbo at gmail.com  Sat Aug  7 06:35:41 2010
From: luismbo at gmail.com (=?ISO-8859-1?Q?Lu=EDs_Oliveira?=)
Date: Sat, 7 Aug 2010 07:35:41 +0100
Subject: [babel-devel] question about #\Nul char and Unicode
In-Reply-To: <AANLkTinXo_dSv9LHBPy-L84JVvH8E2FZTKxKcaYKgJKm@mail.gmail.com>
References: <AANLkTinN6KxLsHHV1ZHAW=o-jh73Q8GkkgUWcUFkcAug@mail.gmail.com> 
	<AANLkTimq7LJTuu4vJZWqMZTVXunEH9AN61kxn0Fa71tm@mail.gmail.com> 
	<AANLkTik_eK5bh9GwJudZoqRfsDn+wUsd6xuOwv-4dh7G@mail.gmail.com> 
	<AANLkTikXgJKAv6AMq9DY4BjHHL_F-=vJ2odDg_JJiMwA@mail.gmail.com> 
	<AANLkTik3ZLYT2=YJXFePoyG9Ynknh-f82bmVCZZqHjXg@mail.gmail.com> 
	<AANLkTik-VcMT=fJMPk5-hnnAeorGy0_=KUrHWqK0Hd8-@mail.gmail.com> 
	<AANLkTinXo_dSv9LHBPy-L84JVvH8E2FZTKxKcaYKgJKm@mail.gmail.com>
Message-ID: <AANLkTikiKt0v+zr+Twzu=mt4zmUwceKAs4iii2y8E+LL@mail.gmail.com>

On Sat, Aug 7, 2010 at 7:23 AM, Vsevolod Dyomkin <vseloved at gmail.com> wrote:
> Actually, the string type doesn't have such a slot now (and that was kind of
> what I thought to add).
> But the more simple solution (not involving the need to patch CFFI) was just
> to use (foreign-string-to-lisp data :count size), which is also used
> internally by translate-from-foreign (but without the count parameter).

Sorry I wasn't clear. What I meant is that you could add such a slot,
then use it in translate-from-foreign to feed foreign-string-to-lisp's
count parameter.

Cheers,

-- 
Lu?s Oliveira
http://r42.eu/~luis/



From luismbo at gmail.com  Sat Aug  7 06:11:53 2010
From: luismbo at gmail.com (=?ISO-8859-1?Q?Lu=EDs_Oliveira?=)
Date: Sat, 7 Aug 2010 07:11:53 +0100
Subject: [babel-devel] question about #\Nul char and Unicode
In-Reply-To: <AANLkTik3ZLYT2=YJXFePoyG9Ynknh-f82bmVCZZqHjXg@mail.gmail.com>
References: <AANLkTinN6KxLsHHV1ZHAW=o-jh73Q8GkkgUWcUFkcAug@mail.gmail.com> 
	<AANLkTimq7LJTuu4vJZWqMZTVXunEH9AN61kxn0Fa71tm@mail.gmail.com> 
	<AANLkTik_eK5bh9GwJudZoqRfsDn+wUsd6xuOwv-4dh7G@mail.gmail.com> 
	<AANLkTikXgJKAv6AMq9DY4BjHHL_F-=vJ2odDg_JJiMwA@mail.gmail.com> 
	<AANLkTik3ZLYT2=YJXFePoyG9Ynknh-f82bmVCZZqHjXg@mail.gmail.com>
Message-ID: <AANLkTik-VcMT=fJMPk5-hnnAeorGy0_=KUrHWqK0Hd8-@mail.gmail.com>

On Fri, Aug 6, 2010 at 12:58 PM, Vsevolod Dyomkin <vseloved at gmail.com> wrote:
> I've prepared a patch to CFFI, that can handle this situation (additional
> TRANSLATE- method for string blobs of known size) and will soon send it, if
> I no better solution will be found.

Cool. I think you can support that through a :size argument for the :string
type. Let me know if you need help implementing such a thing.

-- 
Lu?s Oliveira
http://r42.eu/~luis/



From vseloved at gmail.com  Sat Aug  7 06:23:56 2010
From: vseloved at gmail.com (Vsevolod Dyomkin)
Date: Sat, 7 Aug 2010 09:23:56 +0300
Subject: [babel-devel] question about #\Nul char and Unicode
In-Reply-To: <AANLkTik-VcMT=fJMPk5-hnnAeorGy0_=KUrHWqK0Hd8-@mail.gmail.com>
References: <AANLkTinN6KxLsHHV1ZHAW=o-jh73Q8GkkgUWcUFkcAug@mail.gmail.com> 
	<AANLkTimq7LJTuu4vJZWqMZTVXunEH9AN61kxn0Fa71tm@mail.gmail.com> 
	<AANLkTik_eK5bh9GwJudZoqRfsDn+wUsd6xuOwv-4dh7G@mail.gmail.com> 
	<AANLkTikXgJKAv6AMq9DY4BjHHL_F-=vJ2odDg_JJiMwA@mail.gmail.com> 
	<AANLkTik3ZLYT2=YJXFePoyG9Ynknh-f82bmVCZZqHjXg@mail.gmail.com> 
	<AANLkTik-VcMT=fJMPk5-hnnAeorGy0_=KUrHWqK0Hd8-@mail.gmail.com>
Message-ID: <AANLkTinXo_dSv9LHBPy-L84JVvH8E2FZTKxKcaYKgJKm@mail.gmail.com>

Actually, the string type doesn't have such a slot now (and that was kind of
what I thought to add).
But the more simple solution (not involving the need to patch CFFI) was just
to use (foreign-string-to-lisp data :count size), which is also used
internally by translate-from-foreign (but without the count parameter).

Thanks!
Vsevolod

On Sat, Aug 7, 2010 at 9:11 AM, Lu?s Oliveira <luismbo at gmail.com> wrote:

> On Fri, Aug 6, 2010 at 12:58 PM, Vsevolod Dyomkin <vseloved at gmail.com>
> wrote:
> > I've prepared a patch to CFFI, that can handle this situation (additional
> > TRANSLATE- method for string blobs of known size) and will soon send it,
> if
> > I no better solution will be found.
>
> Cool. I think you can support that through a :size argument for the :string
> type. Let me know if you need help implementing such a thing.
>
> --
> Lu?s Oliveira
> http://r42.eu/~luis/ <http://r42.eu/%7Eluis/>
>
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