subio

Implementing IO traits on regions of IO-compatible types.

Use case

It is often convenient to read, write, and seek within a portion of a file as if it were itself a standalone file. For example, a tar or zip archive, which are a number of file entries concatenated together with some metadata.

subio does the (trivial) bookkeeping to allow that to happen, for standard traits std::io::Read, std::io::Write, std::io::Seek etc..

Extension

The provided types could be extended to support other IO traits like those provided by various async runtimes and io_uring.