README.markdown @ cd52795d9ecd default tip

Update URLs
author Steve Losh <>
date Tue, 14 Jan 2020 19:53:05 -0500
parents 7e8b0e494c82
children (none)
`cl-pcg` is a [permuted congruential generator][pcg] implementation in pure
Common Lisp.

Permuted congruential generators are seedable, small, fast,
fairly-hard-to-predict random number generators.  They can be useful for things
like games.  They can also be advanced and rewound efficiently.

PCGs are **not** cryptographically secure.  If you need that, look elsewhere.


* **License:** MIT
* **Documentation:** <>
* **Mercurial:** <>
* **Git:** <>

Testing with Dieharder

There's a Roswell script you can use to make a little executable that will spew
random bytes to stdout, suitable for piping into `dieharder`:

make build/pcg
./build/pcg | dieharder -a -g 200

`build/pcg` will dump out infinite random bytes until stdout breaks, so maybe
don't run it in a bare terminal unless you want to just totally hose it.