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"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.RingBuffer = void 0; var Chunk = _interopRequireWildcard(require("../Chunk.js")); var _Function = require("../Function.js"); var Option = _interopRequireWildcard(require("../Option.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 */ class RingBuffer { capacity; array; size = 0; current = 0; constructor(capacity) { this.capacity = capacity; this.array = Array.from({ length: capacity }, _Function.constUndefined); } head() { return Option.fromNullable(this.array[this.current]); } lastOrNull() { if (this.size === 0) { return undefined; } const index = this.current === 0 ? this.array.length - 1 : this.current - 1; return this.array[index] ?? undefined; } put(value) { this.array[this.current] = value; this.increment(); } dropLast() { if (this.size > 0) { this.decrement(); this.array[this.current] = undefined; } } toChunk() { const begin = this.current - this.size; const newArray = begin < 0 ? [...this.array.slice(this.capacity + begin, this.capacity), ...this.array.slice(0, this.current)] : this.array.slice(begin, this.current); return Chunk.fromIterable(newArray); } increment() { if (this.size < this.capacity) { this.size += 1; } this.current = (this.current + 1) % this.capacity; } decrement() { this.size -= 1; if (this.current > 0) { this.current -= 1; } else { this.current = this.capacity - 1; } } } exports.RingBuffer = RingBuffer; //# sourceMappingURL=ringBuffer.js.map