25 releases

Uses old Rust 2015

0.5.1 Jul 26, 2021
0.4.6 Jan 15, 2021
0.4.5 Jun 21, 2020
0.4.4 Jan 25, 2020
0.1.3 Oct 9, 2016

#688 in Development tools

Download history 1548/week @ 2021-08-18 1790/week @ 2021-08-25 1449/week @ 2021-09-01 1324/week @ 2021-09-08 1818/week @ 2021-09-15 820/week @ 2021-09-22 1523/week @ 2021-09-29 1673/week @ 2021-10-06 2105/week @ 2021-10-13 2234/week @ 2021-10-20 1472/week @ 2021-10-27 959/week @ 2021-11-03 666/week @ 2021-11-10 1236/week @ 2021-11-17 1125/week @ 2021-11-24 1158/week @ 2021-12-01

4,327 downloads per month
Used in 22 crates (8 directly)

Apache-2.0

1MB
16K SLoC

C 15K SLoC // 0.2% comments Rust 1K SLoC

croaring-rs https://travis-ci.org/saulius/croaring-rs

A Rust wrapper for CRoaring (a C/C++ implementation at https://github.com/RoaringBitmap/CRoaring)

The original java version can be found at https://github.com/RoaringBitmap/RoaringBitmap

Bitmap usage example

use croaring::Bitmap;

let mut rb1 = Bitmap::create();
rb1.add(1);
rb1.add(2);
rb1.add(3);
rb1.add(4);
rb1.add(5);
rb1.add(100);
rb1.add(1000);
rb1.run_optimize();

let mut rb2 = Bitmap::create();
rb2.add(3);
rb2.add(4);
rb2.add(1000);
rb2.run_optimize();

let mut rb3 = Bitmap::create();

assert_eq!(rb1.cardinality(), 7);
assert!(rb1.contains(3));

rb1.and_inplace(&rb2);
rb3.add(5);
rb3.or_inplace(&rb1);

let mut rb4 = Bitmap::fast_or(&[&rb1, &rb2, &rb3]);

rb1.and_inplace(&rb2);
println!("{:?}", rb1);

rb3.add(5);
rb3.or_inplace(&rb1);

println!("{:?}", rb1);

rb3.add(5);
rb3.or_inplace(&rb1);

println!("{:?}", rb3.to_vec());
println!("{:?}", rb3);
println!("{:?}", rb4);

rb4 = Bitmap::fast_or(&[&rb1, &rb2, &rb3]);

println!("{:?}", rb4);

For 64bit Bitmap support, checkout the Treemap. Treemap is not API-compatible with Bitmap, yet most the functionality is overlapping.

Treemap usage example

use std::u64;
use croaring::Treemap;

let mut treemap = Treemap::create();
treemap.add(u64::MAX);
treemap.remove(u64::MAX);

/// Serialization compatible with croaring Treemap version at https://github.com/RoaringBitmap/CRoaring/blob/b88b002407b42fafaea23ea5009a54a24d1c1ed4/cpp/roaring64map.hh

use croaring::treemap::NativeSerializer;

let mut treemap1 = Treemap::create();

for i in 100..1000 {
  treemap1.add(i);
}

treemap1.add(std::u32::MAX as u64);
treemap1.add(std::u64::MAX);

/// Serialization compatible with JVM Treemap version at https://github.com/RoaringBitmap/RoaringBitmap/blob/34654b2d5c3e75e7f9bca1672f4c0b5800d60cf3/roaringbitmap/src/main/java/org/roaringbitmap/longlong/Roaring64NavigableMap.java
use croaring::treemap::JvmSerializer;

let mut treemap2 = Treemap::create();

for i in 100..1000 {
  treemap2.add(i);
}

treemap2.add(std::u32::MAX as u64);
treemap2.add(std::u64::MAX);

Building

git clone --recursive https://github.com/saulius/croaring-rs/
cd croaring-rs
cargo build

In croaring-rs, just like in CRoaring, some CPU related code optimizations are enabled dynamically at runtime. If you are building binaries for specific CPU architectures you can specify ROARING_ARCH environment variable to control enabled code optimizations, e.g. ROARING_ARCH=ivybridge cargo build --release.

Testing

Running unit tests and doc tests:

cargo test

Running benchmark suite (currently on Rust nightly toolchain only):

cargo bench

Documentation

Current documentation is available at https://docs.rs/croaring/latest/croaring/

Dependencies

~0–1.7MB
~35K SLoC