A (wip) dead simple, cross platform crate for finding the locations of holes in sparse files.
Currently supports Unix-like platforms that support the SEEK_HOLE and
SEEK_DATA commands on lseek, as well as windows.
Windows support is not complete and is still being worked on, but should already be fine for most cases.
I do not currently have a Mac to test or develop MacOS support on, so no warranties or claims are currently made about MacOS.
```rust use std::fs::File; use hole_punch::*;
let mut file = File::open("a big sparse file"); let segments = file.scanchunks().expect("Unable to scan chunks"); for segment in segment { if let SegmentType::Data = segment.segmenttype { let start = segment.start; let end = segment.end;
let length = end - start;
do_something_with_data(&mut file, start, length);
}
} ```
Hole-Punch is distributed under your choice of the MIT license, or Apache Version 2.0.
The following features are on my "to implement" list, in order of importance: 1. Windows support 2. Fallback mode (reading the entire file manually looking for chunks of 0s)