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List:       taglib-devel
Subject:    TagLib::FileRef and Unicode
From:       Jeremy Gregorio <jeremy.firefox.addon () gmail ! com>
Date:       2013-12-02 13:42:33
Message-ID: CAH2Gu2Ggtz5U7GTg7+W+nJdEvuVw01VX66rbhAwH-zbTn4M5wg () mail ! gmail ! com
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Hi all,
      I finally noticed my little tagging program doesn't handle Unicode in
the slightest :).

      Does anyone have suggestions on handling Unicode files?

      I'm on an English (United States) Windows XP install trying to build
with Visual C++.

      To deal with the headache that is passing Unicode Parameters I use
URI Encoding (like here http://meyerweb.com/eric/tools/dencoder/) to encode
the parameters to a command line program I wrote and then decode them as
they come in. This part seems to work since I can decode the strings and
write them to tags with the Unicode intact.

      But when I try to write tags to a file on a Unicode path it fails :(.
Right no I'm using QT's library to handle the strings because of a
stackoverflow post I found where the guy had good luck with it, but darned
if I can get it working.

int main(int argc, char *argv[])
{

    TagLib::List<TagLib::FileRef> fileList;

    std::string fileName( "c:\\temp\\debug " );
    std::string extension (".txt");
    ofstream a_file ( fileName + extension );

    QString filepath ( argv[argc - 1] );

    QString url = QUrl::fromPercentEncoding( filepath.toUtf8() );

    a_file << "Param: " << url.toStdString()  << "\n\n";

    QFile myQfile ( url );

    if( !myQfile.exists() ){
        a_file << "The param \""  << myQfile.error() << "\" is not a file.";
    }//END IF

    TagLib::FileRef f( QFile::encodeName(url).constData() );

    if(!f.isNull() && f.tag())
      fileList.append(f);

    argc--;

  a_file.close();

  //... If I get this far I can start applying tags.

 The above works great until I try it with a unicode path, like

"C:\temp\?\Power Up!.mp3"

which I encode as

C%3A%5Ctemp%5C%E7%A7%81%5CPower%20Up!.mp3

I know I'm at least getting the string decoded right since I write it to a
text file and it looks right in notepad++ encoded in UTF-8 without the BOM.


-- 
Jeremy D Gregorio

<http://www.linkedin.com/pub/jeremy-gregorio/36/302/429>
<http://www.glimmersoft.com/socialmedia/btn_viewmy_160x33.png>

[Attachment #5 (text/html)]

<div dir="ltr">Hi all,<br>      I finally noticed my little tagging program \
doesn&#39;t handle Unicode in the slightest :).<br><br>      Does anyone have \
suggestions on handling Unicode files?<br><br>      I&#39;m on an English (United \
States) Windows XP install trying to build with Visual C++.<br> <br>      To deal \
with the headache that is passing Unicode Parameters I use URI Encoding (like here <a \
href="http://meyerweb.com/eric/tools/dencoder/">http://meyerweb.com/eric/tools/dencoder/</a>) \
to encode the parameters to a command line program I wrote and then decode them as \
they come in. This part seems to work since I can decode the strings and write them \
to tags with the Unicode intact.<br> <br>      But when I try to write tags to a file \
on a Unicode path it fails :(. Right no I&#39;m using QT&#39;s library to handle the \
strings because of a stackoverflow post I found where the guy had good luck with it, \
but darned if I can get it working.<br> <br>int main(int argc, char \
*argv[])<br>{<br><br>    TagLib::List&lt;TagLib::FileRef&gt; fileList;<br><br>    \
std::string fileName( &quot;c:\\temp\\debug &quot; );<br>    std::string extension \
(&quot;.txt&quot;);<br>    ofstream a_file ( fileName + extension );<br> <br>    \
QString filepath ( argv[argc - 1] );<br>   <br>    QString url = \
QUrl::fromPercentEncoding( filepath.toUtf8() );<br><br>    a_file &lt;&lt; \
&quot;Param: &quot; &lt;&lt; url.toStdString()  &lt;&lt; &quot;\n\n&quot;;<br> <br>   \
QFile myQfile ( url );<br><br>    if( !myQfile.exists() ){<br>        a_file &lt;&lt; \
&quot;The param \&quot;&quot;  &lt;&lt; myQfile.error() &lt;&lt; &quot;\&quot; is not \
a file.&quot;;<br>    }//END IF<br><br>    TagLib::FileRef f( \
QFile::encodeName(url).constData() );<br>  <br>    if(!f.isNull() &amp;&amp; \
f.tag())<br>      fileList.append(f);<br><br>    argc--;<br><br>  a_file.close();<br> \
<br>  //... If I get this far I can start applying tags.<br><br> The above works \
great until I try it with a unicode path, like<br> <br>&quot;C:\temp\?\Power \
Up!.mp3&quot;<br><br>which I encode \
as<br><br>C%3A%5Ctemp%5C%E7%A7%81%5CPower%20Up!.mp3<br><br>I know I&#39;m at least \
getting the string decoded right since I write it to a text file and it looks right \
in notepad++ encoded in UTF-8 without the BOM.<br> <br clear="all"><br>-- <br>Jeremy \
D Gregorio<br><br><a href="http://www.linkedin.com/pub/jeremy-gregorio/36/302/429" \
target="_blank"><img \
src="http://www.glimmersoft.com/socialmedia/btn_viewmy_160x33.png"></a><br><a \
href="http://www.glimmersoft.com/socialmedia/btn_viewmy_160x33.png" \
target="_blank"></a> </div>



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