positioned-io
This crate allows you to specify an offset for reads and writes, without changing the current
position in a file. This is similar to pread() and pwrite() in C.
The major advantages of this type of I/O are:
- You don't need to seek before doing a random-access read or write, which is convenient.
- Reads don't modify the file at all, so don't require mutability.
Example
Read the fifth 512-byte sector of a file:
use positioned_io::ReadAt;
// Note that file does not need to be mut!
let file = try!(File::open("foo.data"));
let mut buf = vec![0; 512];
let bytes_read = try!(file.read_at(2048, &mut buf));Documentation
http://vasi.github.io/positioned-io/positioned_io/
Usage
This crate works with Cargo and is on
crates.io. Add it to your Cargo.toml like so:
[dependencies]
positioned-io = "0.2.0"