esbuild-gas-plugin/esm/deps/deno.land/std@0.190.0/io/limited_reader.js

esbuild plugin for Google Apps Script.

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// This module is browser compatible.
export class LimitedReader {
    constructor(reader, limit) {
        Object.defineProperty(this, "reader", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: reader
        });
        Object.defineProperty(this, "limit", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: limit
        });
    }
    async read(p) {
        if (this.limit <= 0) {
            return null;
        }
        if (p.length > this.limit) {
            p = p.subarray(0, this.limit);
        }
        const n = await this.reader.read(p);
        if (n == null) {
            return null;
        }
        this.limit -= n;
        return n;
    }
}