2 GB Filesize Linux C++

Reply to 2 GB Filesize Linux C++ on Fri, 30 Jan 2009 10:39:56 GMT

Pyrodragoon — Fri, 30 Jan 2009 10:39:56 GMT

Hi @ all
I've got a problem on Linux with C++:
I need to write some simulationdata to a file.
This is really much data and I always get the following
error when exceeding a filesize of 2GB:
"filesize limit exceeded"

It's not a problem with Linux itself, because
with Java I managed to write a 16.9 GB File without any problems.
For some compatibility reason I cannot do the writing of the simulationdata
without C++.

What can I do to write files bigger than that with C++?
There's really no way around, I need that much.

I hope you can help me

Reply to 2 GB Filesize Linux C++ on Fri, 30 Jan 2009 10:44:11 GMT

sothis_ — Fri, 30 Jan 2009 10:44:11 GMT

if you're using the glibc functions for writing to the file on a 32bit architecture then you might consider using the

#define _FILE_OFFSET_BITS 64

macro before including any standard headers. can't say if it affects the stream operations of libstc++ tho, haven't tested this myself yet

Reply to 2 GB Filesize Linux C++ on Fri, 30 Jan 2009 11:06:33 GMT

Pyrodragoon — Fri, 30 Jan 2009 11:06:33 GMT

Thanks for the fast reaction
That worked well.
I chanded my code and the file is now bigger than 2GB
without any errors.
Thanks a lot, with this working
I've got a lot of work to do now