Re: [MiNT] Max file size

[Vincent Rivière <vincent.riviere@freesbee.fr>]

Roger Burrows wrote:
> As noted by many others earlier today, 2GB is the limit for the underlying 
> Fwrite() system call (and associated file access calls).  Windows had the same 
> problem and initially pushed it to 4GB-1 with a kludge, the major one being 
> that the equivalent of Fseek() returned -1L on any error;

If I'm not wrong, reading or writing a big file with a 32-bit API is not 
such a big problem.

It would be a problem for Fwrite() if you want to write a huge section 
bigger than 2 GB. This could only be useful if you have more than 2 GB 
of RAM or strange use of virtual memory. Both reason will never occur in 
MiNT. Same for Fread().

Fsfirst() will never be able to report the size of a file > 4 GB. This 
is a limitation. However, it is probably already the case for Dfree() ?

Fseek() cannot seek directly to a position farther from 4 GB, but you 
can use Fseek() multiple times, starting from the current position. So 
you can seek as far as you want in the file.

Finally, I think that manipulating files bigger than 2 GB could be 
possible on TOS, if the applications are carefully written.
But I'm not sure this would be really useful :S

--
Vincent Rivière