https://github.com/imneme/pcg-c-basic

PCG — Minimal C Implementation
https://github.com/imneme/pcg-c-basic

Last synced: about 1 month ago
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PCG — Minimal C Implementation

• Host: GitHub
• URL: https://github.com/imneme/pcg-c-basic
• Owner: imneme
• License: apache-2.0
• Created: 2014-10-17T18:46:23.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2023-11-25T11:44:58.000Z (about 1 year ago)
• Last Synced: 2024-08-04T04:03:02.405Z (5 months ago)
• Language: C
• Size: 197 KB
• Stars: 400
• Watchers: 22
• Forks: 51
• Open Issues: 17
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

Awesome Lists containing this project

• awesome-embedded-software - pcg-c-basic - Code provides a minimal implementation of one member of the PCG family of random number generators, which are fast, statistically excellent, and offer a number of useful features. (Cryptography / Random Number Generation)

README

        
# PCG Random Number Generation, Minimal C Edition

[PCG-Random website]: http://www.pcg-random.org

This code provides a minimal implementation of one member of the PCG family

of random number generators, which are fast, statistically excellent,

and offer a number of useful features.

Full details can be found at the [PCG-Random website].  This version

of the code provides a single family member and skips some useful features

(such as jump-ahead/jump-back) -- if you want a more full-featured library, 

you may prefer the full version of the C library, or for all features,

the C++ library.

## Documentation and Examples

Visit [PCG-Random website] for information on how to use this library, or look

at the sample code -- hopefully it should be fairly self explanatory.

## Building

There is no library to build.  Just use the code.  You can however build the

three demo programs.

The code is written in C89-style C with no significant platform dependencies.

On a Unix-style system (e.g., Linux, Mac OS X), or any system with `make`,

you should be able to just type type

    make

Almost all the real code is in `pcg_basic.c`, with type and function

declarations in `pcg_basic.h`.  

On other systems, it should be straightforward to build.  For example, you

even run the code directly using the tinycc compiler, using

    cat pcg_basic.c pcg32-demo.c | tcc -run

## Testing

This command will build the three provided demo programs, `pcg32-global-demo`

(which uses the global rng), `pcg32-demo` (which uses a local generator), and

pcg32x2-demo (which gangs together two generators, showing the usefulness of

creating multiple generators).

To run the demos using a fixed seed (same output every time), run

    ./pcg32-demo

    

To produce different output, run

    ./pcg32-demo -r

You can also pass an integer count to specify how may rounds of output you

would like.