pcg_rand

To use this library add the following to your Cargo.toml

pcg_rand = "0.7.0"

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 more generator types
• Implement seeking for the generators
• Implement Extended generators (If I can figure out that code)

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.