Working with large files.

[Quell]

Say i have a 1 GB file (text file or something), and i wanna read it. I use scroll view with custom drawing to show the data as i scroll though the file. Now i can't really read in 1 GB file and draw it into CView when i need to. So i load 1 MB chunks of it, and display that until the user scrolls to the bottom of the chunk at which point i load the new chunk.

Thats the general idea. If you have another idea on how to do that without file mapping it would be great.

BTW, i wanted to add a seamless ability to edit the file...so file mapping worked pretty well here too.

The problem with this is to find the most efficient way of loading the next/previous chunk. Keep it as one chunk mapped? Or map 3 overlapped file chunks?

I am basically looking for suggestions on what would be the most effective way to do this. Right now i am liking the 3 chunks method, sure a bit more memory usage, but the drawing can be seamless, and the only case when there will be a pause is when the user jumps to some location in a file and i have to reload all 3 chunks (shouldn't happen too often).