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/var/runtime/node_modules/@aws-sdk/node_modules/mqtt-packet

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3 dirs
13 files
generate.js1.1 KB · 53 lines
const writeToStream = require('./writeToStream')const EventEmitter = require('events') function generate (packet, opts) {  const stream = new Accumulator()  writeToStream(packet, stream, opts)  return stream.concat()} class Accumulator extends EventEmitter {  constructor () {    super()    this._array = new Array(20)    this._i = 0  }   write (chunk) {    this._array[this._i++] = chunk    return true  }   concat () {    let length = 0    const lengths = new Array(this._array.length)    const list = this._array    let pos = 0    let i     for (i = 0; i < list.length && list[i] !== undefined; i++) {      if (typeof list[i] !== 'string') lengths[i] = list[i].length      else lengths[i] = Buffer.byteLength(list[i])       length += lengths[i]    }     const result = Buffer.allocUnsafe(length)     for (i = 0; i < list.length && list[i] !== undefined; i++) {      if (typeof list[i] !== 'string') {        list[i].copy(result, pos)        pos += lengths[i]      } else {        result.write(list[i], pos)        pos += lengths[i]      }    }     return result  }} module.exports = generate