Re: losing utf8 flag on strings?

Paul Bijnens <[email protected]> writes:
>Can anyone explain what I'm doing wrong?

As I recall HTML::Entities has a build-time option as to whether it handles
Unicode - do you know if yours has that turned on?
What locale are you in (i.e. is it something that has € as a native
8-bit coding (Windows 1251 or iso-8859-15 say)?


>I have this recurring problem of strings not being flagged
>as utf8, when -- I believe -- they should be.
>
>One of those cases is in decode_entities() from the module
>HTML::Entities, but I have other occurances too (e.g. in Plucene).
>
>When I run this program:
>
>########### cut here
>#!/usr/bin/perl
>use HTML::Entities;
>use Encode;
>print "This is perl ", $], "\n";
>
>$s = "&euro;";
>$t = decode_entities($s);
>$u = decode("utf8", $t, Decode::FB_CROAK);
>
>print "t: ", Encode::is_utf8($t) ? "is" : "not", " utf8", "\n";
>print "u: ", Encode::is_utf8($u) ? "is" : "not", " utf8", "\n";
>print "t: ", ($t eq "\x{20ac}") ? "is" : "not", " Eurosign\n";
>print "u: ", ($u eq "\x{20ac}") ? "is" : "not", " Eurosign\n";
>########### cut here
>
>I get this output:
>
>This is perl 5.008005
>t: not utf8
>u: is utf8
>t: not Eurosign
>u: is Eurosign
>
>I would expect that $t does have the utf8 flag set,
>as indicated in the manpage of HTML::Entities :
>
>        decode_entities( $string )
>            This routine replaces HTML entities found in the
>            $string with the corresponding ISO-8859-1 character,
>            and if possible (under perl 5.8 or later) will replace
>            to Unicode characters.  Unrecognized entities are left
>            alone.
>
>Why do I have to force the utf8 flag using decode("utf8",..) ?

Well that does suggest what you expect I agree.


>
>One of my guesses is that the problem lies in XS-processing of strings
>where the utf8 flag is not set correctly.  True?

Certainly possible - suggest you contact author of HTML:Entities
It is also possible it is left encoded deliberately.

>Why does nobody else complain then?

>
>Is my setup wrong?  (Tried this on different installations including
>a brand new Fedore Core 3...)
>
>
>-- 
>Paul Bijnens, Xplanation                            Tel  +32 16 397.511
>Technologielaan 21 bus 2, B-3001 Leuven, BELGIUM    Fax  +32 16 397.512
>http://www.xplanation.com/          email:  [email protected]
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