Crate divbuf

Recursively divisible buffer class

The divbuf crate provides a buffer structure (DivBufShared) that can be efficiently and safely divided into multiple smaller buffers. Each child buffer can be further divided, recursively. A primitive form of range-locking is available: there is no way to create overlapping mutable child buffers.

This crate is similar to bytes, but with a few key differences:

• bytes is a COW crate. Data will be shared between multiple objects as much as possible, but sometimes the data will be copied to new storage. divbuf, onthe other hand, will never copy data unless explicitly requested.
• A BytesMut object always has the sole ability to access its own data. Once a BytesMut object is created, there is no other way to modify or even read its data that doesn’t involve that object. A DivBufMut, on the other hand, shares its data with its parent DivBufShared. After that DivBufMut has been dropped, another can be created from the parent.
• bytes contains numerous optimizations for dealing with small arrays, such as inline storage. However, some of those optimizations result in data copying, which is anathema to divbuf. divbuf therefore does not include them, and is optimized for working with large arrays.

Examples

use divbuf::*;

let v = String::from("Some Green Stuff").into_bytes();
let dbs = DivBufShared::from(v);
{
    let mut dbm = dbs.try_mut().unwrap();
    let mut right_half = dbm.split_off(5);
    let mut color_buffer = right_half.split_to(5);
    color_buffer[..].copy_from_slice(&b"Black"[..]);
}
let db = dbs.try_const().unwrap();
assert_eq!(db, b"Some Black Stuff"[..]);

Structs

Chunks

The return type of DivBuf::into_chunks

ChunksMut

The return type of DivBufMut::into_chunks

DivBuf

Provides read-only access to a buffer.

DivBufInaccessible

Does not offer either read or write access to the data, but can be upgraded to a buffer that does.

DivBufMut

Provides read-write access to a buffer

DivBufShared

The “entry point” to the divbuf crate.