Re: Open File Error?

Hello,

this problem comes from the fact under Windows the \ char is the
separator inside pathnames. Most built-in predicates handling file
names call absolute_file_name/2 which computes the absolute path
(resolving for instance variable substitutions, relative path like .\
and ..\, etc). Since gprolog does not yet handle wide chars when it
sees a \ it treats it as a separator. Until such an extension is done
there is no "clean" way to solve this. However, I'd like to provide a
"not too dirty" workaround for the special case of pathnames. The
easiest way I see to fix this

is to use an enviroment variable (or a Windows register key) to
indicate if a \ preceded by a char >= 128 is not a separator. What
do you think ?

Daniel

Yasuhisa Matsumura wrote:

Dear Prof. Daniel Diaz and other GNU-Prolog
developers!

Thank you very much for your splendid
Prolog compiler.

I would like to report the following 'BUG'
(or 'Short-coming') under Windows OS.

I would be very glad as a Japanese user, if
you could fix it some time.

Thank you very much, again.

Yasuhisa Matsumura

[email protected]

OS: Windows Vista

GNU-Prolog version: 1.3.1

The Japanese Windows system encoding (=
Shift_JIS) includes such a 2-byte character:

'\x95\\\' i.e.
name('\x95\\\',[149,92]).

%%%%%%%%%%%%%%%%%%%%%

But you can NOT open the file with the file
name '\x95\\\.txt', for example,

test(C) :-
see('\x95\\\.txt'),get0(C),seen.

uncaught exception:
error(existence_error(source_sink,'\x95\\\.txt'),see/1)

%%%%%%%%%%%%%%%%%%%%%%%%%

In contrast, you CAN open the file with the
file name '\x95\[.txt' i.e. name('\x95\[',[149,91]).

test(C) :- see('\x95\[.txt'), get0(C),
seen.

C = 97 in case you wrote the
character 'a' in the file.

%%%%%%%%%%%%%%%%

PS.　　The
characters have the following appearance on Windows system:

'\x95\\\'　 =　　'表'.

'\x95\['　 =　　'票'.

But I think you cannot view the character
appearance on your French or English Operating System.

--

Ce message a été vérifié par
MailScanner

pour des virus ou des polluriels et rien de

suspect n'a été trouvé.

----------

_______________________________________________
Bug-prolog mailing list
[email protected]
http://lists.gnu.org/mailman/listinfo/bug-prolog

--

Ce message a été vérifié par
MailScanner

pour des virus ou des polluriels et rien de

suspect n'a été trouvé.

_______________________________________________
Bug-prolog mailing list
[email protected]
http://lists.gnu.org/mailman/listinfo/bug-prolog