[#94] Backend

https://project.mdnd-it.cc/work_packages/94

SerpentRace_Backend/node_modules/pure-rand/lib/distribution/UnsafeUniformBigIntDistribution.js

@@ -0,0 +1,36 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.unsafeUniformBigIntDistribution = unsafeUniformBigIntDistribution;
+var SBigInt = typeof BigInt !== 'undefined' ? BigInt : undefined;
+var One = typeof BigInt !== 'undefined' ? BigInt(1) : undefined;
+var ThirtyTwo = typeof BigInt !== 'undefined' ? BigInt(32) : undefined;
+var NumValues = typeof BigInt !== 'undefined' ? BigInt(0x100000000) : undefined;
+function unsafeUniformBigIntDistribution(from, to, rng) {
+    var diff = to - from + One;
+    var FinalNumValues = NumValues;
+    var NumIterations = 1;
+    while (FinalNumValues < diff) {
+        FinalNumValues <<= ThirtyTwo;
+        ++NumIterations;
+    }
+    var value = generateNext(NumIterations, rng);
+    if (value < diff) {
+        return value + from;
+    }
+    if (value + diff < FinalNumValues) {
+        return (value % diff) + from;
+    }
+    var MaxAcceptedRandom = FinalNumValues - (FinalNumValues % diff);
+    while (value >= MaxAcceptedRandom) {
+        value = generateNext(NumIterations, rng);
+    }
+    return (value % diff) + from;
+}
+function generateNext(NumIterations, rng) {
+    var value = SBigInt(rng.unsafeNext() + 0x80000000);
+    for (var num = 1; num < NumIterations; ++num) {
+        var out = rng.unsafeNext();
+        value = (value << ThirtyTwo) + SBigInt(out + 0x80000000);
+    }
+    return value;
+}