Can someone please comment on this short program

[Matthias Kaeppler <matthias finitestate org>]

Hi,

since my question about Uri::append_file_name remained unanswered, I 
have set up a small test program which illustrates the problem. I still 
haven't found the error, and it would be nice if you could comment about 
why the output from this program is as it is (please assume that a file 
by the name "täst" exists in my home directory):

#include <iostream>
#include <libgnomevfsmm/uri.h>
#include <libgnomevfsmm/init.h>
#include <libgnomevfsmm/utils.h>

int main(int argc, char** argv)
{
    using namespace Gnome::Vfs;
    typedef Glib::RefPtr<Uri> UriPtr;
    init();
    std::string home_dir = Glib::getenv("HOME");
    Glib::ustring filename = "täst";

    { // Test 1
	UriPtr uri = Uri::create(get_uri_from_local_path(home_dir));
	std::cout << "Uri: " << uri->to_string() << " | exists: ";
	std::cout << std::boolalpha << uri->uri_exists() << std::endl;
    }

    { // Test 2
	UriPtr uri = Uri::create(get_uri_from_local_path(home_dir));
	uri = uri->append_file_name(filename);
	std::cout << "Uri: " << uri->to_string() << " | exists: ";
	std::cout << std::boolalpha << uri->uri_exists() << std::endl;
    }

    { // Test 3
	UriPtr uri = Uri::create(get_uri_from_local_path(home_dir));
	uri = uri->append_file_name(escape_string(filename));
	std::cout << "Uri: " << uri->to_string() << " | exists: ";
	std::cout << std::boolalpha << uri->uri_exists() << std::endl;
    }

}

Output:
Uri: file:///home/matthias | exists: true
Uri: file:///home/matthias/t%E4st | exists: false
Uri: file:///home/matthias/t%25E4st | exists: false

As soon as I append a filename which contains more than the initial 127 
ASCII characters, the Uri object never seems to point to an existing 
entity (even if the file is there!).
Furthermore, why do both outputs where the filename is appended differ 
in their "escapedness"? Will the already escaped filename which is 
passes to append_file_name() be escaped again (that is, the '%' symbol?).

I haven't yet found a way to make an Uri work when pointing to a file 
which name contains umlauts, please help.

Thanks,
Matthias