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Message-ID: <26c14c2a0610120520j1e8a2117w7ea03ffeadc5975b@mail.gmail.com>
Date: Thu, 12 Oct 2006 16:20:15 +0400
From: "Oleg Khaschansky" <oleg.v.khaschansky@gmail.com>
To: harmony-dev@incubator.apache.org
Subject: Re: ICU4C gurus? (was: [jira] Commented: (HARMONY-100)
 text/BidiWrapper issue?)
In-Reply-To: <c3755b3a0610120316v6e99c8e1k90f6a64544f4b69e@mail.gmail.com>
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References: <c3755b3a0610120316v6e99c8e1k90f6a64544f4b69e@mail.gmail.com>

What exactly your code is? It, probably, may rearrange the levels if
you didn't explicitely set them for all the characters including
trailing whitespace. If this is the case it may add some additional
levels and relocate the array. Could you check if the size of the
array changed?

On 10/12/06, Alexey Petrenko <alexey.a.petrenko@gmail.com> wrote:
> Is any ICU4C gurus here?
>
> I'm setting an embedding levels pointer with ubidi_setPara method. And
> it seems that ubidi_getLevels returns not the same pointer.
>
> Is this correct feeling or am I doing something wrong?
>
> SY, Alexey
>
>
> 2006/10/11, Alexey Petrenko (JIRA) <jira@apache.org>:
> >    [ http://issues.apache.org/jira/browse/HARMONY-100?page=comments#action_12441378 ]
> >
> > Alexey Petrenko commented on HARMONY-100:
> > -----------------------------------------
> >
> > I agree with Tim's suggestion and will create a patch.
> >
> > > text/BidiWrapper issue?
> > > -----------------------
> > >
> > >                 Key: HARMONY-100
> > >                 URL: http://issues.apache.org/jira/browse/HARMONY-100
> > >             Project: Harmony
> > >          Issue Type: Bug
> > >          Components: Classlib
> > >            Reporter: Vladimir Gorr
> > >
> > > Let's consider the following test:
> > > import java.text.Bidi;
> > > public class Test {
> > >       public static void main(String[] args) throws Exception {
> > >               Bidi bd = new Bidi(new char[] { 's', 's', 's' }, 0,
> > >                               new byte[] { (byte) -7, (byte) -2, (byte) -3 },
> > >                               0, 3, Bidi.DIRECTION_DEFAULT_LEFT_TO_RIGHT);
> > >               System.out.println("Expected 7, real " + "     " + bd.getLevelAt(0));
> > >       }
> > > }
> > > In my opinion the JNI implementation of Bidi (text/BidiWrapper.c file, ubidi_1setPara() function) contains a potential bug, namely:
> > > 1. If  the embeddingLevels  argument is not NULL then _embeddingLevels variable is initialized with the JNI GetByteArrayElements() function;
> > > 2. ICU function (ubidi_setPara) initializes ICU inner structure and puts the _embeddingLevels into it;
> > > 3. If _embeddingLevels pointer is not NULL then the JNI ReleaseByteArrayElements() function (with 0 as fourth parameter) is called.
> > >     This function releases the memory (according to JNI specification) the _embeddingLevels pointer refers to;
> > > 4. After that ICU inner structure isn't initialized properly. Call of ICU ubidi_getLevels() function can return incorrect values (see java test above).
> > > It seems the JNI_COMMIT parameter instead of "0" should be passed to the ReleaseByteArrayElements() to avoid this problem.
> > > I'd like to underline the test mentioned above works w/o any issues for Harmony-14 contribution (although it shouldn't sometimes IMHO).
> > > Therefore if there are any doubts in my argumentation this issue can be closed as invalid.
> >
> > --
> > This message is automatically generated by JIRA.
> > -
> > If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa
> > -
> > For more information on JIRA, see: http://www.atlassian.com/software/jira
> >
> >
> >
>
>
> --
> Alexey A. Petrenko
> Intel Middleware Products Division
>
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