OpenEuphoria

Re: [OT] files/dir on windoze

• Posted by "Juergen Luethje" <j.lue at gmx.de> Jul 08, 2004
• 878 views

Kat wrote:

<big snip>

> Thanks for duplicating the bug, Juergen. By any chance did it stop you from
> using the computer for anything else before you got out of that crashed
> filename program?

I noticed that other programs worked slower than normally. I think this
is nothing special, because the Eu program needs some CPU time, and
writing to disk isn't a fast process. But the program didn't stop me
from using the computer for anything else.

> I have a suspicion this is related to the total bytecount of the filenames and
> the allowed space in the FAT per directory.

In the meantime, I have the same suspicion.

> It occured with me using LFN on
> win95B, on a 15gb  FAT32 partition. Keep in mind the bytecount of the
> filename may be higher than the filename as displayed to you.

Absolutely. I made some tests in the root directory of a 1.4 MB floppy
disk (e.g. 9+3 means a filename such as '123456789.txt'):

length of filenames     max. number of files
-------------------     --------------------
 1+3                     112
 ..
 9+3                     112
10+3                      74
 ..
22+3                      74
23+3                      56

Maybe someone can discover the appropriate formula, how much bytes are
actually occupied by a filename, depending on the number of its
characters. It might look somehow like this:
   occupiedBytes = ceil(numberOfCharacters/a)*a + b

Maybe a similar formula would apply to subdirectories on a hard disk?

<snip>

Regards,
   Juergen