On Tue, Oct 18, 2011 at 9:22 AM, Jens Alfke j...@mooseyard.com wrote:
On Oct 17, 2011, at 9:26 PM, Wilker wrote:
if the user is acessing a
file from an external drive, and the file has 8gb, I only wanna read 64kb,
so, I don't wanna read it all just for 64kb.
Just use
Thanks for the answers guys.
I mean I will use the f* operations.
But they are really safe? There is anything that I can do for extreme
situations in case to avoid bad memory access?
---
Wilker Lúcio
http://about.me/wilkerlucio/bio
Kajabi Consultant
+55 81 82556600
On Thu, Oct 20, 2011 at
On Thu, Oct 20, 2011 at 8:19 PM, Wilker wilkerlu...@gmail.com wrote:
But they are really safe? There is anything that I can do for extreme
situations in case to avoid bad memory access?
Yes they are safe. The f I/O calls go back to the very beginnings
of the C standard library in the late
On Thu, Oct 20, 2011 at 8:48 PM, Jens Alfke j...@mooseyard.com wrote:
What’s unsafe is accessing file-mapped memory after the file becomes
unavailable.
If you use fread (or read), you’re not doing that. You're allocating your
own memory from the heap first, then copying data from the file
On Oct 20, 2011, at 8:56 PM, Don Quixote de la Mancha
quix...@dulcineatech.com wrote:
For C++, you would need to throw an exception on I/O error, then write
exception-safe code. I have not yet really figured out the right way
to do the equivalent for Objective-C, because Objective-C
On Oct 17, 2011, at 10:26 PM, Wilker wrote:
NSData *fileData = [NSData dataWithContentsOfFile:path
options:NSDataReadingMappedAlways | NSDataReadingUncached error:error];
Do you retain fileData?
--
Scott Ribe
scott_r...@elevated-dev.com
http://www.elevated-dev.com/
(303) 722-0567 voice
On Oct 17, 2011, at 9:26 PM, Wilker wrote:
I wanna it mapped always and uncached because I don't wanna read the entire
file, just some pieces of it (small pieces), so, if the user is acessing a
file from an external drive, and the file has 8gb, I only wanna read 64kb,
so, I don't wanna read
On Mon, Oct 17, 2011 at 9:26 PM, Wilker wilkerlu...@gmail.com wrote:
Hi guys,
Im having a little problem here with reading NSData from a file, this is the
line that starts the reading:
NSData *fileData = [NSData dataWithContentsOfFile:path
options:NSDataReadingMappedAlways |
