dist/lib/streams.js.map

{
  "version": 3,
  "sources": ["../../lib/streams.ts"],
  "sourcesContent": ["/**\n * Streams\n * Pokemon Showdown - http://pokemonshowdown.com/\n *\n * The Node.js standard library's Streams are really hard to use. This\n * offers a better stream API.\n *\n * Documented in STREAMS.md.\n *\n * @license MIT\n */\n\nconst BUF_SIZE = 65536 * 4;\n\ntype BufferEncoding =\n\t'ascii' | 'utf8' | 'utf-8' | 'utf16le' | 'ucs2' | 'ucs-2' | 'base64' | 'latin1' | 'binary' | 'hex';\n\nexport class ReadStream {\n\tbuf: Buffer;\n\tbufStart: number;\n\tbufEnd: number;\n\tbufCapacity: number;\n\treadSize: number;\n\tatEOF: boolean;\n\terrorBuf: Error[] | null;\n\tencoding: BufferEncoding;\n\tisReadable: boolean;\n\tisWritable: boolean;\n\tnodeReadableStream: NodeJS.ReadableStream | null;\n\tnextPushResolver: (() => void) | null;\n\tnextPush: Promise<void>;\n\tawaitingPush: boolean;\n\n\tconstructor(optionsOrStreamLike: { [k: string]: any } | NodeJS.ReadableStream | string | Buffer = {}) {\n\t\tthis.buf = Buffer.allocUnsafe(BUF_SIZE);\n\t\tthis.bufStart = 0;\n\t\tthis.bufEnd = 0;\n\t\tthis.bufCapacity = BUF_SIZE;\n\t\tthis.readSize = 0;\n\t\tthis.atEOF = false;\n\t\tthis.errorBuf = null;\n\t\tthis.encoding = 'utf8';\n\t\tthis.isReadable = true;\n\t\tthis.isWritable = false;\n\t\tthis.nodeReadableStream = null;\n\t\tthis.nextPushResolver = null;\n\t\tthis.nextPush = new Promise(resolve => {\n\t\t\tthis.nextPushResolver = resolve;\n\t\t});\n\t\tthis.awaitingPush = false;\n\n\t\tlet options: { [k: string]: any };\n\t\tif (typeof optionsOrStreamLike === 'string') {\n\t\t\toptions = { buffer: optionsOrStreamLike };\n\t\t} else if (optionsOrStreamLike instanceof Buffer) {\n\t\t\toptions = { buffer: optionsOrStreamLike };\n\t\t} else if (typeof (optionsOrStreamLike as any)._readableState === 'object') {\n\t\t\toptions = { nodeStream: optionsOrStreamLike as NodeJS.ReadableStream };\n\t\t} else {\n\t\t\toptions = optionsOrStreamLike;\n\t\t}\n\t\tif (options.nodeStream) {\n\t\t\tconst nodeStream: NodeJS.ReadableStream = options.nodeStream;\n\t\t\tthis.nodeReadableStream = nodeStream;\n\t\t\tnodeStream.on('data', data => {\n\t\t\t\tthis.push(data);\n\t\t\t});\n\t\t\tnodeStream.on('end', () => {\n\t\t\t\tthis.pushEnd();\n\t\t\t});\n\n\t\t\toptions.read = function (this: ReadStream, unusedBytes: number) {\n\t\t\t\tthis.nodeReadableStream!.resume();\n\t\t\t};\n\n\t\t\toptions.pause = function (this: ReadStream, unusedBytes: number) {\n\t\t\t\tthis.nodeReadableStream!.pause();\n\t\t\t};\n\t\t}\n\n\t\tif (options.read) this._read = options.read;\n\t\tif (options.pause) this._pause = options.pause;\n\t\tif (options.destroy) this._destroy = options.destroy;\n\t\tif (options.encoding) this.encoding = options.encoding;\n\t\tif (options.buffer !== undefined) {\n\t\t\tthis.push(options.buffer);\n\t\t\tthis.pushEnd();\n\t\t}\n\t}\n\n\tget bufSize() {\n\t\treturn this.bufEnd - this.bufStart;\n\t}\n\n\tmoveBuf() {\n\t\tif (this.bufStart !== this.bufEnd) {\n\t\t\tthis.buf.copy(this.buf, 0, this.bufStart, this.bufEnd);\n\t\t}\n\t\tthis.bufEnd -= this.bufStart;\n\t\tthis.bufStart = 0;\n\t}\n\n\texpandBuf(newCapacity = this.bufCapacity * 2) {\n\t\tconst newBuf = Buffer.allocUnsafe(newCapacity);\n\t\tthis.buf.copy(newBuf, 0, this.bufStart, this.bufEnd);\n\t\tthis.bufEnd -= this.bufStart;\n\t\tthis.bufStart = 0;\n\t\tthis.bufCapacity = newCapacity;\n\t\tthis.buf = newBuf;\n\t}\n\n\tensureCapacity(additionalCapacity: number) {\n\t\tif (this.bufEnd + additionalCapacity <= this.bufCapacity) return;\n\t\tconst capacity = this.bufEnd - this.bufStart + additionalCapacity;\n\t\tif (capacity <= this.bufCapacity) {\n\t\t\treturn this.moveBuf();\n\t\t}\n\t\tlet newCapacity = this.bufCapacity * 2;\n\t\twhile (newCapacity < capacity) newCapacity *= 2;\n\t\tthis.expandBuf(newCapacity);\n\t}\n\n\tpush(buf: Buffer | string, encoding: BufferEncoding = this.encoding) {\n\t\tlet size;\n\t\tif (this.atEOF) return;\n\t\tif (typeof buf === 'string') {\n\t\t\tsize = Buffer.byteLength(buf, encoding);\n\t\t\tthis.ensureCapacity(size);\n\t\t\tthis.buf.write(buf, this.bufEnd);\n\t\t} else {\n\t\t\tsize = buf.length;\n\t\t\tthis.ensureCapacity(size);\n\t\t\tbuf.copy(this.buf, this.bufEnd);\n\t\t}\n\t\tthis.bufEnd += size;\n\t\tif (this.bufSize > this.readSize && size * 2 < this.bufSize) this._pause();\n\t\tthis.resolvePush();\n\t}\n\n\tpushEnd() {\n\t\tthis.atEOF = true;\n\t\tthis.resolvePush();\n\t}\n\n\tpushError(err: Error, recoverable?: boolean) {\n\t\tif (!this.errorBuf) this.errorBuf = [];\n\t\tthis.errorBuf.push(err);\n\t\tif (!recoverable) this.atEOF = true;\n\t\tthis.resolvePush();\n\t}\n\n\treadError() {\n\t\tif (this.errorBuf) {\n\t\t\tconst err = this.errorBuf.shift()!;\n\t\t\tif (!this.errorBuf.length) this.errorBuf = null;\n\t\t\tthrow err;\n\t\t}\n\t}\n\n\tpeekError() {\n\t\tif (this.errorBuf) {\n\t\t\tthrow this.errorBuf[0];\n\t\t}\n\t}\n\n\tresolvePush() {\n\t\tif (!this.nextPushResolver) throw new Error(`Push after end of read stream`);\n\t\tthis.nextPushResolver();\n\t\tif (this.atEOF) {\n\t\t\tthis.nextPushResolver = null;\n\t\t\treturn;\n\t\t}\n\t\tthis.nextPush = new Promise(resolve => {\n\t\t\tthis.nextPushResolver = resolve;\n\t\t});\n\t}\n\n\t_read(size = 0): void | Promise<void> {\n\t\tthrow new Error(`ReadStream needs to be subclassed and the _read function needs to be implemented.`);\n\t}\n\n\t_destroy(): void | Promise<void> {}\n\t_pause() {}\n\n\t/**\n\t * Reads until the internal buffer is non-empty. Does nothing if the\n\t * internal buffer is already non-empty.\n\t *\n\t * If `byteCount` is a number, instead read until the internal buffer\n\t * contains at least `byteCount` bytes.\n\t *\n\t * If `byteCount` is `true`, reads even if the internal buffer is\n\t * non-empty.\n\t */\n\tloadIntoBuffer(byteCount: number | null | true = null, readError?: boolean) {\n\t\tthis[readError ? 'readError' : 'peekError']();\n\t\tif (byteCount === 0) return;\n\t\tthis.readSize = Math.max(\n\t\t\tbyteCount === true ? this.bufSize + 1 : byteCount === null ? 1 : byteCount,\n\t\t\tthis.readSize\n\t\t);\n\t\tif (!this.errorBuf && !this.atEOF && this.bufSize < this.readSize) {\n\t\t\tlet bytes: number | null = this.readSize - this.bufSize;\n\t\t\tif (bytes === Infinity || byteCount === null || byteCount === true) bytes = null;\n\t\t\treturn this.doLoad(bytes, readError);\n\t\t}\n\t}\n\n\tasync doLoad(chunkSize?: number | null, readError?: boolean) {\n\t\twhile (!this.errorBuf && !this.atEOF && this.bufSize < this.readSize) {\n\t\t\tif (chunkSize) void this._read(chunkSize);\n\t\t\telse void this._read();\n\t\t\tawait this.nextPush;\n\t\t\tthis[readError ? 'readError' : 'peekError']();\n\t\t}\n\t}\n\n\tpeek(byteCount?: number | null, encoding?: BufferEncoding): string | null | Promise<string | null>;\n\tpeek(encoding: BufferEncoding): string | null | Promise<string | null>;\n\tpeek(byteCount: number | string | null = null, encoding: BufferEncoding = this.encoding) {\n\t\tif (typeof byteCount === 'string') {\n\t\t\tencoding = byteCount as BufferEncoding;\n\t\t\tbyteCount = null;\n\t\t}\n\t\tconst maybeLoad = this.loadIntoBuffer(byteCount);\n\t\tif (maybeLoad) return maybeLoad.then(() => this.peek(byteCount as number, encoding));\n\n\t\tif (!this.bufSize && byteCount !== 0) return null;\n\t\tif (byteCount === null) return this.buf.toString(encoding, this.bufStart, this.bufEnd);\n\t\tif (byteCount > this.bufSize) byteCount = this.bufSize;\n\t\treturn this.buf.toString(encoding, this.bufStart, this.bufStart + byteCount);\n\t}\n\n\tpeekBuffer(byteCount: number | null = null): Buffer | null | Promise<Buffer | null> {\n\t\tconst maybeLoad = this.loadIntoBuffer(byteCount);\n\t\tif (maybeLoad) return maybeLoad.then(() => this.peekBuffer(byteCount));\n\n\t\tif (!this.bufSize && byteCount !== 0) return null;\n\t\tif (byteCount === null) return this.buf.slice(this.bufStart, this.bufEnd);\n\t\tif (byteCount > this.bufSize) byteCount = this.bufSize;\n\t\treturn this.buf.slice(this.bufStart, this.bufStart + byteCount);\n\t}\n\n\tasync read(byteCount?: number | null, encoding?: BufferEncoding): Promise<string | null>;\n\tasync read(encoding: BufferEncoding): Promise<string | null>;\n\tasync read(byteCount: number | string | null = null, encoding: BufferEncoding = this.encoding) {\n\t\tif (typeof byteCount === 'string') {\n\t\t\tencoding = byteCount as BufferEncoding;\n\t\t\tbyteCount = null;\n\t\t}\n\t\tawait this.loadIntoBuffer(byteCount, true);\n\n\t\t// This MUST NOT be awaited: we MUST synchronously clear byteCount after peeking\n\t\t// if the buffer is written to after peek but before clearing the buffer, the write\n\t\t// will be lost forever\n\t\tconst out = this.peek(byteCount, encoding);\n\t\tif (out && typeof out !== 'string') {\n\t\t\tthrow new Error(\"Race condition; you must not read before a previous read has completed\");\n\t\t}\n\n\t\tif (byteCount === null || byteCount >= this.bufSize) {\n\t\t\tthis.bufStart = 0;\n\t\t\tthis.bufEnd = 0;\n\t\t\tthis.readSize = 0;\n\t\t} else {\n\t\t\tthis.bufStart += byteCount;\n\t\t\tthis.readSize -= byteCount;\n\t\t}\n\t\treturn out;\n\t}\n\n\tbyChunk(byteCount?: number | null) {\n\t\t// eslint-disable-next-line @typescript-eslint/no-this-alias\n\t\tconst byteStream = this;\n\t\treturn new ObjectReadStream<string>({\n\t\t\tasync read(this: ObjectReadStream<string>) {\n\t\t\t\tconst next = await byteStream.read(byteCount);\n\t\t\t\tif (typeof next === 'string') this.push(next);\n\t\t\t\telse this.pushEnd();\n\t\t\t},\n\t\t});\n\t}\n\n\tbyLine() {\n\t\t// eslint-disable-next-line @typescript-eslint/no-this-alias\n\t\tconst byteStream = this;\n\t\treturn new ObjectReadStream<string>({\n\t\t\tasync read(this: ObjectReadStream<string>) {\n\t\t\t\tconst next = await byteStream.readLine();\n\t\t\t\tif (typeof next === 'string') this.push(next);\n\t\t\t\telse this.pushEnd();\n\t\t\t},\n\t\t});\n\t}\n\n\tdelimitedBy(delimiter: string) {\n\t\t// eslint-disable-next-line @typescript-eslint/no-this-alias\n\t\tconst byteStream = this;\n\t\treturn new ObjectReadStream<string>({\n\t\t\tasync read(this: ObjectReadStream<string>) {\n\t\t\t\tconst next = await byteStream.readDelimitedBy(delimiter);\n\t\t\t\tif (typeof next === 'string') this.push(next);\n\t\t\t\telse this.pushEnd();\n\t\t\t},\n\t\t});\n\t}\n\n\tasync readBuffer(byteCount: number | null = null) {\n\t\tawait this.loadIntoBuffer(byteCount, true);\n\n\t\t// This MUST NOT be awaited: we must synchronously clear the buffer after peeking\n\t\t// (see `read`)\n\t\tconst out = this.peekBuffer(byteCount);\n\t\tif (out && (out as Promise<unknown>).then) {\n\t\t\tthrow new Error(\"Race condition; you must not read before a previous read has completed\");\n\t\t}\n\n\t\tif (byteCount === null || byteCount >= this.bufSize) {\n\t\t\tthis.bufStart = 0;\n\t\t\tthis.bufEnd = 0;\n\t\t} else {\n\t\t\tthis.bufStart += byteCount;\n\t\t}\n\t\treturn out;\n\t}\n\n\tasync indexOf(symbol: string, encoding: BufferEncoding = this.encoding) {\n\t\tlet idx = this.buf.indexOf(symbol, this.bufStart, encoding);\n\t\twhile (!this.atEOF && (idx >= this.bufEnd || idx < 0)) {\n\t\t\tawait this.loadIntoBuffer(true);\n\t\t\tidx = this.buf.indexOf(symbol, this.bufStart, encoding);\n\t\t}\n\t\tif (idx >= this.bufEnd) return -1;\n\t\treturn idx - this.bufStart;\n\t}\n\n\tasync readAll(encoding: BufferEncoding = this.encoding) {\n\t\treturn (await this.read(Infinity, encoding)) || '';\n\t}\n\n\tpeekAll(encoding: BufferEncoding = this.encoding) {\n\t\treturn this.peek(Infinity, encoding);\n\t}\n\n\tasync readDelimitedBy(symbol: string, encoding: BufferEncoding = this.encoding) {\n\t\tif (this.atEOF && !this.bufSize) return null;\n\t\tconst idx = await this.indexOf(symbol, encoding);\n\t\tif (idx < 0) {\n\t\t\treturn this.readAll(encoding);\n\t\t} else {\n\t\t\tconst out = await this.read(idx, encoding);\n\t\t\tthis.bufStart += Buffer.byteLength(symbol, 'utf8');\n\t\t\treturn out;\n\t\t}\n\t}\n\n\tasync readLine(encoding: BufferEncoding = this.encoding) {\n\t\tif (!encoding) throw new Error(`readLine must have an encoding`);\n\t\tlet line = await this.readDelimitedBy('\\n', encoding);\n\t\tif (line?.endsWith('\\r')) line = line.slice(0, -1);\n\t\treturn line;\n\t}\n\n\tdestroy() {\n\t\tthis.atEOF = true;\n\t\tthis.bufStart = 0;\n\t\tthis.bufEnd = 0;\n\t\tif (this.nextPushResolver) this.resolvePush();\n\t\treturn this._destroy();\n\t}\n\n\tasync next(byteCount: number | null = null) {\n\t\tconst value = await this.read(byteCount);\n\t\treturn { value, done: value === null } as { value: string, done: false } | { value: null, done: true };\n\t}\n\n\tasync pipeTo(outStream: WriteStream, options: { noEnd?: boolean } = {}) {\n\t\tlet next;\n\t\twhile ((next = await this.next(), !next.done)) {\n\t\t\tawait outStream.write(next.value);\n\t\t}\n\t\tif (!options.noEnd) return outStream.writeEnd();\n\t}\n}\n\ninterface WriteStreamOptions {\n\tnodeStream?: NodeJS.WritableStream;\n\twrite?: (this: WriteStream, data: string | Buffer) => (Promise<undefined> | undefined | void);\n\twriteEnd?: (this: WriteStream) => Promise<any>;\n}\n\nexport class WriteStream {\n\tisReadable: boolean;\n\tisWritable: true;\n\tencoding: BufferEncoding;\n\tnodeWritableStream: NodeJS.WritableStream | null;\n\tdrainListeners: (() => void)[];\n\n\tconstructor(optionsOrStream: WriteStreamOptions | NodeJS.WritableStream = {}) {\n\t\tthis.isReadable = false;\n\t\tthis.isWritable = true;\n\t\tthis.encoding = 'utf8';\n\t\tthis.nodeWritableStream = null;\n\t\tthis.drainListeners = [];\n\n\t\tlet options: WriteStreamOptions = optionsOrStream as any;\n\t\tif ((options as any)._writableState) {\n\t\t\toptions = { nodeStream: optionsOrStream as NodeJS.WritableStream };\n\t\t}\n\t\tif (options.nodeStream) {\n\t\t\tconst nodeStream: NodeJS.WritableStream = options.nodeStream;\n\t\t\tthis.nodeWritableStream = nodeStream;\n\t\t\toptions.write = function (data: string | Buffer) {\n\t\t\t\tconst result = this.nodeWritableStream!.write(data);\n\t\t\t\tif (result !== false) return undefined;\n\t\t\t\tif (!this.drainListeners.length) {\n\t\t\t\t\tthis.nodeWritableStream!.once('drain', () => {\n\t\t\t\t\t\tfor (const listener of this.drainListeners) listener();\n\t\t\t\t\t\tthis.drainListeners = [];\n\t\t\t\t\t});\n\t\t\t\t}\n\t\t\t\treturn new Promise(resolve => {\n\t\t\t\t\t// `as () => void` is necessary because TypeScript thinks that it should be a function\n\t\t\t\t\t// that takes an undefined value as its only parameter: `(value: PromiseLike<undefined> | undefined) => void`\n\t\t\t\t\tthis.drainListeners.push(resolve as () => void);\n\t\t\t\t});\n\t\t\t};\n\t\t\t// Prior to Node v10.12.0, attempting to close STDOUT or STDERR will throw\n\t\t\tif (nodeStream !== process.stdout && nodeStream !== process.stderr) {\n\t\t\t\toptions.writeEnd = function () {\n\t\t\t\t\treturn new Promise<void>(resolve => {\n\t\t\t\t\t\tthis.nodeWritableStream!.end(() => resolve());\n\t\t\t\t\t});\n\t\t\t\t};\n\t\t\t}\n\t\t}\n\n\t\tif (options.write) this._write = options.write;\n\t\tif (options.writeEnd) this._writeEnd = options.writeEnd;\n\t}\n\n\twrite(chunk: Buffer | string): void | Promise<void> {\n\t\treturn this._write(chunk);\n\t}\n\n\twriteLine(chunk: string): void | Promise<void> {\n\t\tif (chunk === null) {\n\t\t\treturn this.writeEnd();\n\t\t}\n\t\treturn this.write(chunk + '\\n');\n\t}\n\n\t_write(chunk: Buffer | string): void | Promise<void> {\n\t\tthrow new Error(`WriteStream needs to be subclassed and the _write function needs to be implemented.`);\n\t}\n\n\t_writeEnd(): void | Promise<void> {}\n\n\tasync writeEnd(chunk?: string): Promise<void> {\n\t\tif (chunk) {\n\t\t\tawait this.write(chunk);\n\t\t}\n\t\treturn this._writeEnd();\n\t}\n}\n\nexport class ReadWriteStream extends ReadStream implements WriteStream {\n\tisReadable: true;\n\tisWritable: true;\n\tnodeWritableStream: NodeJS.WritableStream | null;\n\tdrainListeners: (() => void)[];\n\n\tconstructor(options: AnyObject = {}) {\n\t\tsuper(options);\n\t\tthis.isReadable = true;\n\t\tthis.isWritable = true;\n\t\tthis.nodeWritableStream = null;\n\t\tthis.drainListeners = [];\n\n\t\tif (options.nodeStream) {\n\t\t\tconst nodeStream: NodeJS.WritableStream = options.nodeStream;\n\t\t\tthis.nodeWritableStream = nodeStream;\n\t\t\toptions.write = function (data: string | Buffer) {\n\t\t\t\tconst result = this.nodeWritableStream.write(data);\n\t\t\t\tif (result !== false) return undefined;\n\t\t\t\tif (!this.drainListeners.length) {\n\t\t\t\t\tthis.nodeWritableStream.once('drain', () => {\n\t\t\t\t\t\tfor (const listener of this.drainListeners) listener();\n\t\t\t\t\t\tthis.drainListeners = [];\n\t\t\t\t\t});\n\t\t\t\t}\n\t\t\t\treturn new Promise(resolve => {\n\t\t\t\t\tthis.drainListeners.push(resolve);\n\t\t\t\t});\n\t\t\t};\n\t\t\t// Prior to Node v10.12.0, attempting to close STDOUT or STDERR will throw\n\t\t\tif (nodeStream !== process.stdout && nodeStream !== process.stderr) {\n\t\t\t\toptions.writeEnd = function () {\n\t\t\t\t\treturn new Promise<void>(resolve => {\n\t\t\t\t\t\tthis.nodeWritableStream.end(() => resolve());\n\t\t\t\t\t});\n\t\t\t\t};\n\t\t\t}\n\t\t}\n\t\tif (options.write) this._write = options.write;\n\t\tif (options.writeEnd) this._writeEnd = options.writeEnd;\n\t}\n\n\twrite(chunk: Buffer | string): Promise<void> | void {\n\t\treturn this._write(chunk);\n\t}\n\n\twriteLine(chunk: string): Promise<void> | void {\n\t\treturn this.write(chunk + '\\n');\n\t}\n\n\t_write(chunk: Buffer | string): Promise<void> | void {\n\t\tthrow new Error(`WriteStream needs to be subclassed and the _write function needs to be implemented.`);\n\t}\n\n\t/**\n\t * In a ReadWriteStream, `_read` does not need to be implemented,\n\t * because it's valid for the read stream buffer to be filled only by\n\t * `_write`.\n\t */\n\t_read(size?: number) {}\n\n\t_writeEnd(): void | Promise<void> {}\n\n\tasync writeEnd() {\n\t\treturn this._writeEnd();\n\t}\n}\n\ntype ObjectReadStreamOptions<T> = {\n\tbuffer?: T[],\n\tread?: (this: ObjectReadStream<T>) => void | Promise<void>,\n\tpause?: (this: ObjectReadStream<T>) => void | Promise<void>,\n\tdestroy?: (this: ObjectReadStream<T>) => void | Promise<void>,\n\tnodeStream?: undefined,\n} | {\n\tbuffer?: undefined,\n\tread?: undefined,\n\tpause?: undefined,\n\tdestroy?: undefined,\n\tnodeStream: NodeJS.ReadableStream,\n};\n\nexport class ObjectReadStream<T> {\n\tbuf: T[];\n\treadSize: number;\n\tatEOF: boolean;\n\terrorBuf: Error[] | null;\n\tisReadable: boolean;\n\tisWritable: boolean;\n\tnodeReadableStream: NodeJS.ReadableStream | null;\n\tnextPushResolver: (() => void) | null;\n\tnextPush: Promise<void>;\n\tawaitingPush: boolean;\n\n\tconstructor(optionsOrStreamLike: ObjectReadStreamOptions<T> | NodeJS.ReadableStream | T[] = {}) {\n\t\tthis.buf = [];\n\t\tthis.readSize = 0;\n\t\tthis.atEOF = false;\n\t\tthis.errorBuf = null;\n\t\tthis.isReadable = true;\n\t\tthis.isWritable = false;\n\t\tthis.nodeReadableStream = null;\n\t\tthis.nextPushResolver = null;\n\t\tthis.nextPush = new Promise(resolve => {\n\t\t\tthis.nextPushResolver = resolve;\n\t\t});\n\t\tthis.awaitingPush = false;\n\n\t\tlet options: ObjectReadStreamOptions<T>;\n\t\tif (Array.isArray(optionsOrStreamLike)) {\n\t\t\toptions = { buffer: optionsOrStreamLike };\n\t\t} else if (typeof (optionsOrStreamLike as any)._readableState === 'object') {\n\t\t\toptions = { nodeStream: optionsOrStreamLike as NodeJS.ReadableStream };\n\t\t} else {\n\t\t\toptions = optionsOrStreamLike as ObjectReadStreamOptions<T>;\n\t\t}\n\t\tif ((options as any).nodeStream) {\n\t\t\tconst nodeStream: NodeJS.ReadableStream = (options as any).nodeStream;\n\t\t\tthis.nodeReadableStream = nodeStream;\n\t\t\tnodeStream.on('data', data => {\n\t\t\t\tthis.push(data);\n\t\t\t});\n\t\t\tnodeStream.on('end', () => {\n\t\t\t\tthis.pushEnd();\n\t\t\t});\n\n\t\t\toptions = {\n\t\t\t\tread() {\n\t\t\t\t\tthis.nodeReadableStream!.resume();\n\t\t\t\t},\n\t\t\t\tpause() {\n\t\t\t\t\tthis.nodeReadableStream!.pause();\n\t\t\t\t},\n\t\t\t};\n\t\t}\n\n\t\tif (options.read) this._read = options.read;\n\t\tif (options.pause) this._pause = options.pause;\n\t\tif (options.destroy) this._destroy = options.destroy;\n\t\tif (options.buffer !== undefined) {\n\t\t\tthis.buf = options.buffer.slice();\n\t\t\tthis.pushEnd();\n\t\t}\n\t}\n\n\tpush(elem: T) {\n\t\tif (this.atEOF) return;\n\t\tthis.buf.push(elem);\n\t\tif (this.buf.length > this.readSize && this.buf.length >= 16) void this._pause();\n\t\tthis.resolvePush();\n\t}\n\n\tpushEnd() {\n\t\tthis.atEOF = true;\n\t\tthis.resolvePush();\n\t}\n\n\tpushError(err: Error, recoverable?: boolean) 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