Re: [Swig-user] Java path string conversion UTF-16 / locale 8bits / Windows

[Mathieu M. <mat...@gm...>]

Just to close this thread, Umberto was perfectly right, the following
did the trick for me:

http://gdcm.git.sourceforge.net/git/gitweb.cgi?p=gdcm/gdcm;a=commitdiff;h=8f0b51c044a2c2a5028392652722d57f880b31d2#patch4

This is documented at:

http://java.sun.com/docs/books/jni/html/pitfalls.html#12400

...
Strings in the Java virtual machine consist of Unicode characters,
whereas native strings are typically in a locale-specific encoding.
Use utility functions such as JNU_NewStringNative (§8.2.1) and
JNU_GetStringNativeChars (§8.2.2) to translate between Unicode
jstrings and locale-specific native strings of the underlying host
environment. Pay special attention to message strings and file names,
which typically are internationalized. If a native method gets a file
name as a jstring, the file name must be translated to a native string
before being passed to a C library routine.
...

As a side note Umberto your code did not compile for me, for example:

jclass cls = (*env)->FindClass(env, name);

should read:

jclass cls = env->FindClass(name);

anyway thanks a *lot* for the quick solution !

On Thu, Jul 7, 2011 at 11:49 AM, Mathieu Malaterre
<mat...@gm...> wrote:
> On a different subject, I am not clear why it only fails on
> windows7/64bits and not on my UTF8 debian/amd64 box...
>
> On Thu, Jul 7, 2011 at 11:47 AM, Mathieu Malaterre
> <mat...@gm...> wrote:
>> Dear William,
>>
>>  I have reproduced the issue I am seeing here at:
>>
>> https://github.com/malaterre/PublicRep/tree/master/SWIG/string
>>
>>  I used cmake to build the swig module. Once the module and
>> testdemo.java are build just follow the instruction to execute:
>>
>> $ mkdir toto
>> $ CLASSPATH=demo.jar;. java testdemo toto
>> could not open toto\tête.txt
>>
>>  The testdemo will create a file called 'tête' within the directory
>> 'toto' in this above scenario. However this path cannot be passed
>> properly to the fopen function.
>>
>>  Hoping to be clear.
>>
>> Thanks !
>>
>> On Thu, Jul 7, 2011 at 8:01 AM, William S Fulton
>> <ws...@fu...> wrote:
>>> I don't understand what the problem is here? SWIG provides wrappers for char
>>> * which converts ASCII C strings to and from a Java string. What more do you
>>> need?
>>>
>>> William
>>>
>>> On 04/07/11 17:59, Umberto Nicoletti wrote:
>>>>
>>>> I would rather say the issue is with java because all java strings are
>>>> utf16.
>>>> Dunno why swig doesn't provide standard wrappers.
>>>>
>>>> /Umberto
>>>>
>>>> On Monday, July 4, 2011, Mathieu Malaterre<mat...@gm...>
>>>>  wrote:
>>>>>
>>>>> Umberto,
>>>>>
>>>>>   Thanks for the code. However I still do not understand if this is an
>>>>> actual swig issue ? Why can't I simply use swig to do that ?
>>>>>
>>>>> Thanks
>>>>>
>>>>> On Mon, May 30, 2011 at 2:29 PM, Umberto Nicoletti
>>>>> <umb...@gm...>  wrote:
>>>>>>
>>>>>> Take a look at the mappings used by the mapserver project in:
>>>>>>
>>>>>> https://trac.osgeo.org/mapserver/browser/trunk/mapserver/mapscript/java/javamodule.i
>>>>>>
>>>>>> starting from line 44.
>>>>>> HTH,
>>>>>> Umberto
>>>>>> On Mon, May 30, 2011 at 2:11 PM, Mathieu Malaterre
>>>>>> <mat...@gm...>  wrote:
>>>>>>>
>>>>>>> Hi there,
>>>>>>>
>>>>>>>  I am wrapping a C library which basically fopen a file and so some
>>>>>>> stuff. I could not figure out how to convert the java string given by
>>>>>>> FileUtil.toFile(fo).getPath() into a proper local 8bits representation
>>>>>>> (const char * expected by fopen).
>>>>>>>
>>>>>>>  Does anyone has something already implemented ?
>>>>>>>
>>>>>>> Thanks
>>>>>>> --
>>>>>>> Mathieu
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ------------------------------------------------------------------------------
>>>>>>> vRanger cuts backup time in half-while increasing security.
>>>>>>> With the market-leading solution for virtual backup and recovery,
>>>>>>> you get blazing-fast, flexible, and affordable data protection.
>>>>>>> Download your free trial now.
>>>>>>> http://p.sf.net/sfu/quest-d2dcopy1
>>>>>>> _______________________________________________
>>>>>>> Swig-user mailing list
>>>>>>> Swi...@li...
>>>>>>> https://lists.sourceforge.net/lists/listinfo/swig-user
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Mathieu
>>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
>>>> All of the data generated in your IT infrastructure is seriously valuable.
>>>> Why? It contains a definitive record of application performance, security
>>>> threats, fraudulent activity, and more. Splunk takes this data and makes
>>>> sense of it. IT sense. And common sense.
>>>> http://p.sf.net/sfu/splunk-d2d-c2
>>>> _______________________________________________
>>>> Swig-user mailing list
>>>> Swi...@li...
>>>> https://lists.sourceforge.net/lists/listinfo/swig-user
>>>>
>>>
>>>
>>
>>
>>
>> --
>> Mathieu
>>
>
>
>
> --
> Mathieu
>



-- 
Mathieu