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_node_modules/effect/dist/cjs/internal/random.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.randomTag = exports.make = exports.fixed = exports.RandomTypeId = void 0;
+var Chunk = _interopRequireWildcard(require("../Chunk.js"));
+var Context = _interopRequireWildcard(require("../Context.js"));
+var _Function = require("../Function.js");
+var Hash = _interopRequireWildcard(require("../Hash.js"));
+var PCGRandom = _interopRequireWildcard(require("../Utils.js"));
+var core = _interopRequireWildcard(require("./core.js"));
+function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function (e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, default: e }; if (null === e || "object" != typeof e && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (const t in e) "default" !== t && {}.hasOwnProperty.call(e, t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, t)) && (i.get || i.set) ? o(f, t, i) : f[t] = e[t]); return f; })(e, t); }
+/** @internal */
+const RandomSymbolKey = "effect/Random";
+/** @internal */
+const RandomTypeId = exports.RandomTypeId = /*#__PURE__*/Symbol.for(RandomSymbolKey);
+/** @internal */
+const randomTag = exports.randomTag = /*#__PURE__*/Context.GenericTag("effect/Random");
+/** @internal */
+class RandomImpl {
+  seed;
+  [RandomTypeId] = RandomTypeId;
+  PRNG;
+  constructor(seed) {
+    this.seed = seed;
+    this.PRNG = new PCGRandom.PCGRandom(seed);
+  }
+  get next() {
+    return core.sync(() => this.PRNG.number());
+  }
+  get nextBoolean() {
+    return core.map(this.next, n => n > 0.5);
+  }
+  get nextInt() {
+    return core.sync(() => this.PRNG.integer(Number.MAX_SAFE_INTEGER));
+  }
+  nextRange(min, max) {
+    return core.map(this.next, n => (max - min) * n + min);
+  }
+  nextIntBetween(min, max) {
+    return core.sync(() => this.PRNG.integer(max - min) + min);
+  }
+  shuffle(elements) {
+    return shuffleWith(elements, n => this.nextIntBetween(0, n));
+  }
+}
+const shuffleWith = (elements, nextIntBounded) => {
+  return core.suspend(() => (0, _Function.pipe)(core.sync(() => Array.from(elements)), core.flatMap(buffer => {
+    const numbers = [];
+    for (let i = buffer.length; i >= 2; i = i - 1) {
+      numbers.push(i);
+    }
+    return (0, _Function.pipe)(numbers, core.forEachSequentialDiscard(n => (0, _Function.pipe)(nextIntBounded(n), core.map(k => swap(buffer, n - 1, k)))), core.as(Chunk.fromIterable(buffer)));
+  })));
+};
+const swap = (buffer, index1, index2) => {
+  const tmp = buffer[index1];
+  buffer[index1] = buffer[index2];
+  buffer[index2] = tmp;
+  return buffer;
+};
+const make = seed => new RandomImpl(Hash.hash(seed));
+/** @internal */
+exports.make = make;
+class FixedRandomImpl {
+  values;
+  [RandomTypeId] = RandomTypeId;
+  index = 0;
+  constructor(values) {
+    this.values = values;
+    if (values.length === 0) {
+      throw new Error("Requires at least one value");
+    }
+  }
+  getNextValue() {
+    const value = this.values[this.index];
+    this.index = (this.index + 1) % this.values.length;
+    return value;
+  }
+  get next() {
+    return core.sync(() => {
+      const value = this.getNextValue();
+      if (typeof value === "number") {
+        return Math.max(0, Math.min(1, value));
+      }
+      return Hash.hash(value) / 2147483647;
+    });
+  }
+  get nextBoolean() {
+    return core.sync(() => {
+      const value = this.getNextValue();
+      if (typeof value === "boolean") {
+        return value;
+      }
+      return Hash.hash(value) % 2 === 0;
+    });
+  }
+  get nextInt() {
+    return core.sync(() => {
+      const value = this.getNextValue();
+      if (typeof value === "number" && Number.isFinite(value)) {
+        return Math.round(value);
+      }
+      return Math.abs(Hash.hash(value));
+    });
+  }
+  nextRange(min, max) {
+    return core.map(this.next, n => (max - min) * n + min);
+  }
+  nextIntBetween(min, max) {
+    return core.sync(() => {
+      const value = this.getNextValue();
+      if (typeof value === "number" && Number.isFinite(value)) {
+        return Math.max(min, Math.min(max - 1, Math.round(value)));
+      }
+      const hash = Math.abs(Hash.hash(value));
+      return min + hash % (max - min);
+    });
+  }
+  shuffle(elements) {
+    return shuffleWith(elements, n => this.nextIntBetween(0, n));
+  }
+}
+/** @internal */
+const fixed = values => new FixedRandomImpl(values);
+exports.fixed = fixed;
+//# sourceMappingURL=random.js.map