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61 lines
2.1 KiB
61 lines
2.1 KiB
// A library of seedable RNGs implemented in Javascript.
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//
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// Usage:
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//
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// var seedrandom = require('seedrandom');
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// var random = seedrandom(1); // or any seed.
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// var x = random(); // 0 <= x < 1. Every bit is random.
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// var x = random.quick(); // 0 <= x < 1. 32 bits of randomness.
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// alea, a 53-bit multiply-with-carry generator by Johannes Baagøe.
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// Period: ~2^116
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// Reported to pass all BigCrush tests.
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var alea = require('./lib/alea');
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// xor128, a pure xor-shift generator by George Marsaglia.
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// Period: 2^128-1.
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// Reported to fail: MatrixRank and LinearComp.
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var xor128 = require('./lib/xor128');
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// xorwow, George Marsaglia's 160-bit xor-shift combined plus weyl.
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// Period: 2^192-2^32
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// Reported to fail: CollisionOver, SimpPoker, and LinearComp.
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var xorwow = require('./lib/xorwow');
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// xorshift7, by François Panneton and Pierre L'ecuyer, takes
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// a different approach: it adds robustness by allowing more shifts
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// than Marsaglia's original three. It is a 7-shift generator
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// with 256 bits, that passes BigCrush with no systmatic failures.
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// Period 2^256-1.
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// No systematic BigCrush failures reported.
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var xorshift7 = require('./lib/xorshift7');
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// xor4096, by Richard Brent, is a 4096-bit xor-shift with a
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// very long period that also adds a Weyl generator. It also passes
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// BigCrush with no systematic failures. Its long period may
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// be useful if you have many generators and need to avoid
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// collisions.
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// Period: 2^4128-2^32.
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// No systematic BigCrush failures reported.
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var xor4096 = require('./lib/xor4096');
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// Tyche-i, by Samuel Neves and Filipe Araujo, is a bit-shifting random
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// number generator derived from ChaCha, a modern stream cipher.
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// https://eden.dei.uc.pt/~sneves/pubs/2011-snfa2.pdf
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// Period: ~2^127
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// No systematic BigCrush failures reported.
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var tychei = require('./lib/tychei');
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// The original ARC4-based prng included in this library.
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// Period: ~2^1600
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var sr = require('./seedrandom');
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sr.alea = alea;
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sr.xor128 = xor128;
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sr.xorwow = xorwow;
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sr.xorshift7 = xorshift7;
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sr.xor4096 = xor4096;
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sr.tychei = tychei;
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module.exports = sr;
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