pcg_rand
To use this library add the following to your Cargo.toml
pcg_rand = "0.10.0"
PCG stands for Permuted Congruential generators. They are a simple family of random number generators which use the much denounced Linear Congruential Generator as a base. To overcome the well known limitations of the LCG Generator the PCG family utilizes permutation functions to permute the output. More information about PCG can be found here.
Current Status
This library currently provides 32 and 64 bit generators. It provides the major "stream" types, including the unique stream which is determined by their current location in memory.
Future Work
- Implement seeking for the generators
Changes
- (6/8/2016): Added support for extended generators. This implementation is based on my understanding of how the extension is specified in the paper. I would love a code review on the implementation. I don't think that this particular implementation is the same as the implementation in the C++ version of PCG.
- (6/7/2016): Added back some of the macros which got removed in 0.5.0 This is in an effort to improve some performance. Hopefully associated constants can help us remove these again, but for now removing the PcgConsts trait gives some extra performance and reduces indirection. It also means that it is now easier to implement new streams and multipliers because you aren't bound to using the three things in PcgConsts.
- (7/31/2018): Remembered to update the README (including changelog). Migrated
to using the
rand: 0.5
crate which involves new methods. Most of the functions are now not based on macro's but instead are fully generic and utilize thenum-traits
wrapping traits as needed. Additionally the crate now has support for using the nativeu128
since that is stable in Rust now. This pushes the minimum Rust version to 1.26. - (8/2/2018): Provided better defaults for the
new_unseeded
function so that it can be useful for testing. Improved the docs to suggest seeding and updated the documentation examples to usefrom_entropy
instead ofnew_unseeded
to promote good use of the generators. - (10/15/2018): Added cargo features for
u128
and experimentalserde1
support. Also fixed an issue in0.9.2
which caused it to be nightly only (oops). Started migrating benchmarks to critereon. - (12/4/2018): Upgraded to
rand 0.6
andrand_core 0.3
. Fixed an issue where tests wouldn't run if there was nou128
support. Serde support is still highly experimental.