Problems with KDE_stat on systems where the default locale is not utf-8

Thiago Macieira thiago at
Mon Dec 1 07:47:08 GMT 2008

Thiago Macieira wrote:
>Ralf Habacker wrote:
>>Christian Ehrlicher schrieb:
>>> Thiago Macieira schrieb:
>>>> On Thursday 20 November 2008 09:11:22 Christian Ehrlicher wrote:
>>>>>> The Qt API will. Or, alternatively, the Win32 API will (the *W
>>>>>> functions).
>>>>> How fast is QFileInfo in Qt4.5? If it's too slow I'm still for a
>>>>> new small
>>>>> wrapper class for local files inside KDE to handle stat() and
>>>>> others. Adding ifdefs everywhere isn't a nice solution at all.
>>>> No improvement.
>>>> The problem is systematic and can't be improved. It can only be made
>>>> faster by ditching the file engine support we added in older
>>>> versions of Qt. That is, only for Qt 5.
>>> I would like to add some new functions to kde_file.h - if possible
>>> before 4.2 so we can handle non-encodeable filenames on windows.
>>> namespace KDE
>>> {
>>>   KDECORE_EXPORT int chmod(const QString &path, mode_t mode);
>>>   KDECORE_EXPORT int link(const QString &in, const QString &out);
>>>   KDECORE_EXPORT int lstat(const QString &path, KDE_struct_stat
>>> *buf); KDECORE_EXPORT int mkdir(const QString &pathname, mode_t
>>> mode); KDECORE_EXPORT int open(const QString &pathname, int flags);
>>> KDECORE_EXPORT int open(const QString &pathname, int flags, mode_t
>>> mode);
>>>   KDECORE_EXPORT int rmdir(const QString &pathname);
>>>   KDECORE_EXPORT int remove(const QString &pathname);
>>>   KDECORE_EXPORT int rename(const QString &in, const QString &out);
>>>   KDECORE_EXPORT int stat(const QString &path, KDE_struct_stat *buf);
>>>   KDECORE_EXPORT int symlink(const QString &in, const QString &out);
>>>   KDECORE_EXPORT int unlink(const QString &pathname);
>>>   KDECORE_EXPORT int utime(const QString &filename, struct utimbuf
>>> *buf); };
>>> Maybe I forgot some
>>close(), read(), write(), lseek(),creat()
>Yes for creat, but we should use the three-argument open instead.
>As for the others, they do not take the file name, only a file
> descriptor. So there's no need to overload with QString.

It has just occurred to me: what's your point with this?

Do you want people to write code like?

#ifdef Q_OS_WIN
	int fd = open(filename, O_RDONLY);
	int fd = open(QFile::encodeName(filename), O_RDONLY);

Why should we have all of those #ifdefs everywhere in KDE code?

The QString overloads are not enough for the Unix side, so they can't be 
used. At the same side, the const char* are not enough for the Windows 

If we're going to do anything about this, how about using the preferred 
final solution: QUrl/KUrl ? That's the only thing that meets the needs of 
both sides. (Not KUrl yet)

  Thiago Macieira  -  thiago (AT) - thiago (AT)
    PGP/GPG: 0x6EF45358; fingerprint:
    E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
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