OpenEuphoria

Re: Size of files

• Posted by Vincent <darkvincentdude at yahoo.com> Oct 25, 2005
• 459 views

Juergen Luethje wrote:
> 
> Hi all,
> 
> how big are the biggest files that Euphoria can handle (especially
> interesting for me: on Windows)?
> 
> I stumbled across the following text in the Eu 2.5 documentation of
> where():   "i = where(fn)".
> In the Euphoria documentation, 'i' means an integer, doesn't it?
> Since where() is zero based(*), this would mean that it works with
> files up to
>      MAX_INTEGER+1 bytes = power(2,30) bytes = 1 GB
> 
> Does where() actually not work with files > 1 GB?
> 
> Regards,
>    Juergen
> 
> (*) This is not mentioned in the documentation of where(), BTW.
> 
> -- 
> Have you read a good program lately?
> 
> 

That was a bug fix in Euphoria 2.4 Alpha:

bug fixed: where() was not always reporting file positions greater than 1 Gb
correctly. Arithmetic performed on the position would probably fail. It now
handles up to 2 Gb.


You can use integer atoms up to 32 bits long, but the limit of 2 GB is based on
the open() routine who's OP uses an obsolete C file routine, I think. Thus 2 GB
is the limit for Euphoria applications, libraries, opening files, file inclusion,
EDB files, etc.

Rob should use newer C file I/O routines in the C backend that offer the full 4
GB limit/8 byte offsets or something. Rob should also be thinking about 64 bit
compliant products sooner rather than later.

4 GB these days is not very much let alone 2 GB, especially for databases.


Regards,
Vincent

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