Re: [icu-support] Loading a custom converter in icu4c

[mow <mo...@ic...>]

You can get more information about custom converters here:

http://userguide.icu-project.org/conversion/data

You should use the makeconv tool to convert the ucm file to cnv file.

The ucnv_countAvailable function lists only the converters in the alias
file.

You should be able to load the converter (after using the makeconv tool)
by either using the ICU_DATA or u_setDataDirectory() to where the dat file
is located.

-M



On Tue, 12 Jan 2016 11:39:09 +0100, Jonatan Pålsson
<jon...@pe...> wrote:
> Hello,
> 
> I'm trying to load a custom converter, and use this converter to convert
> into Unicode, but I am having issues. I don't want to install thisy 
> converter globally in my system, but I would like to load it only for my
> program.
> 
> I have written a ucm file for a custom converter (the European
Broadcasting
> Union Latin code). I then created a cnv file from this ucm using gencmn.
> I've also created a dat file using pkgdata.
> 
> After I have created these files, I am a bit unclear on what I should
do. I
> have tried the following:
> 
> Create a C program which lists the number of available converters
> using ucnv_countAvailable, and run this program with the ICU_DATA
> environment variable exported to the directory containing my cnv file.
This
> yields 231 converters, which I can only assume are my system-global
> converters. So it seems my converter is not picked up here.
> u_setDataDirectory() yields the same results as exporting ICU_DATA. I
also
> tried specifying the cnv file itself using u_setDataDirectory(), as well
as
> the dat file. Same result.
> 
> I also tried using ucnv_openPackage() to open the dat file, specifically
I
> tried:
> 
>> ucnv_openPackage("./ebu-latin.dat", "ebu-latin", &error);
> 
> I also tried absolute paths. From the documentation it seems like I
should
> not use a path, but a package name, I therefore tried "ebu-latin" as
well.
> Each of these combinations yield a U_FILE_ACCESS_ERROR.
> 
> I am trying this on a Debian system, with the stock version of ICU.. Do
I
> need to compile ICU with some special options in order to allow loading
of
> custom converters/resources?
> 
> I think I am unclear of the entire process of how a custom converter can
be
> loaded, could someone help me out by specifying the steps of loading a
> custom converter?
> 
> Thanks a lot.
>  -- Jonatan