nanorand 0.1.0

A tiny, fast, zero-dep library for random number generation.
Documentation

nanorand

nanorand is a Rust crate, meant for fast, high-level, zero-dependency random number generation.

Example

use nanorand::rand;

fn gen_in_range(lower: u64, upper: u64) -> u64 {
    let random_number = rand();
    (random_number % (upper - lower + 1)) + lower
}

fn main() {
    println!("Random 64-bit number: {}", rand());
    println!("Random number in 0-100 range: {}", gen_in_range(0, 100));
}

RNG Implementations

Current default (nanohash::rand) is wyrand.

Entropy Sources

  • Unix-like (Linux, Android, macOS, iOS, FreeBSD, OpenBSD)
    • with no_std - libc rand (#[deny(unsafe_code)])
    • without no_std - first /dev/urandom, else /dev/random, else system time. (#[forbid(unsafe_code)])
  • Windows - BCryptGenRandom with system-preferred RNG. (#[deny(unsafe_code)])

Manually Seeding

nanorand by default has the ctor feature enabled, which will seed the global state using the default entropy source.
If needed, you can seed it yourself:

fn main() {
    nanorand::seed_global(42);
}

License

The zlib/libpng License

Copyright (c) 2020 aspen

This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.

  2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.

  3. This notice may not be removed or altered from any source distribution.