type Writer = Deno.Writer;import { decode, encode } from "../strings/mod.ts";
export class StringWriter implements Writer { private chunks: Uint8Array[] = []; private byteLength = 0; private cache: string | undefined;
constructor(private base: string = "") { const c = encode(base); this.chunks.push(c); this.byteLength += c.byteLength; }
async write(p: Uint8Array): Promise<number> { this.chunks.push(p); this.byteLength += p.byteLength; this.cache = undefined; return p.byteLength; }
toString(): string { if (this.cache) { return this.cache; } const buf = new Uint8Array(this.byteLength); let offs = 0; for (const chunk of this.chunks) { buf.set(chunk, offs); offs += chunk.byteLength; } this.cache = decode(buf); return this.cache; }}