Re: [gobo-eiffel-develop] File URI resolution

[Colin P. A. <co...@co...>]

>>>>> "Colin" == Colin Paul Adams <co...@co...> writes:

    Colin> xgespr%C3%A4ch.xml

    Colin> The percent encoding equates to lower case a-umlaut.

    Colin> Now on my linux system, file name encoding is UTF-8 (I
    Colin> think), but the file supplied with the test suite exists on
    Colin> my system with the a-umlaut as a Latin-1 character. I am
    Colin> not sure if this is a bug with the unzip command, or what
    Colin> (in fact, I am very unsure about everything to do with this
    Colin> - the one thing I am certain about is that the percent
    Colin> encoding MUST be interpreted as UTF-8, and the file name
    Colin> decoded accordingly).

    Colin> Not surprsingly, the test fails on my system.

    Colin> But I begin to wonder if the test would not also have
    Colin> failed if the file name were correct as a UTF-8 file name.

    Colin> The resolver uses UT_FILE_URI_ROUTINES, whichj in turn make
    Colin> use of

    Colin> file_system.pathname_to_string (uri_to_pathname (a_uri))

    Colin> As far as I can tell, the net result of this is to pass a
    Colin> UTF-8 byte string to the Eiffel runtime as a
    Colin> STRING/STRING_8.

    Colin> I suspect the runtime expects a Latin-1 name, but I don't
    Colin> know.  What about on a windows system with the file system
    Colin> using UTF-16.

I tried some experimenting.

Changing the LANG env. var. on my system from en_GB.UTF-8 to en_GB,
and then unzipping the distribution afresh didn't help.

So Instead I renamed the file to give it its proper Unicode name (in
UTF-8).
Now the test works on Linux.

This confirms that the byte-sequence is being passed straight to
fopen, and apparently fopen isn't doing any translations with it.

I shall try to find the time to repeat the tests on Windows.

Does anyone have a Linux system where ISO-8859-1 is the standard
encoding? If so, perhaps we can try the test there. But I bet it
fails.

It looks like we can't do any better within Gobo though.
-- 
Colin Adams
Preston Lancashire