deno.land / std@0.177.1 / io / multi_reader.ts
12345678910111213141516171819202122232425// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import type { Reader } from "../types.d.ts";
/** Reader utility for combining multiple readers */export class MultiReader implements Reader { readonly #readers: Reader[]; #currentIndex = 0;
constructor(readers: Reader[]) { this.#readers = [...readers]; }
async read(p: Uint8Array): Promise<number | null> { const r = this.#readers[this.#currentIndex]; if (!r) return null; const result = await r.read(p); if (result === null) { this.#currentIndex++; return 0; } return result; }}
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