openpgp/dist/lightweight/ponyfill.es6.min.mjs.map

OpenPGP.js is a Javascript implementation of the OpenPGP protocol. This is defined in RFC 4880.

{"version":3,"file":"ponyfill.es6.min.mjs","sources":["../../node_modules/@openpgp/web-stream-tools/node_modules/web-streams-polyfill/dist/ponyfill.es6.mjs"],"sourcesContent":["/**\n * web-streams-polyfill v3.0.3\n */\n/// <reference lib=\"es2015.symbol\" />\nconst SymbolPolyfill = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ?\n    Symbol :\n    description => `Symbol(${description})`;\n\n/// <reference lib=\"dom\" />\nfunction noop() {\n    return undefined;\n}\nfunction getGlobals() {\n    if (typeof self !== 'undefined') {\n        return self;\n    }\n    else if (typeof window !== 'undefined') {\n        return window;\n    }\n    else if (typeof global !== 'undefined') {\n        return global;\n    }\n    return undefined;\n}\nconst globals = getGlobals();\n\nfunction typeIsObject(x) {\n    return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\nconst rethrowAssertionErrorRejection = noop;\n\nconst originalPromise = Promise;\nconst originalPromiseThen = Promise.prototype.then;\nconst originalPromiseResolve = Promise.resolve.bind(originalPromise);\nconst originalPromiseReject = Promise.reject.bind(originalPromise);\nfunction newPromise(executor) {\n    return new originalPromise(executor);\n}\nfunction promiseResolvedWith(value) {\n    return originalPromiseResolve(value);\n}\nfunction promiseRejectedWith(reason) {\n    return originalPromiseReject(reason);\n}\nfunction PerformPromiseThen(promise, onFulfilled, onRejected) {\n    // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n    // approximation.\n    return originalPromiseThen.call(promise, onFulfilled, onRejected);\n}\nfunction uponPromise(promise, onFulfilled, onRejected) {\n    PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection);\n}\nfunction uponFulfillment(promise, onFulfilled) {\n    uponPromise(promise, onFulfilled);\n}\nfunction uponRejection(promise, onRejected) {\n    uponPromise(promise, undefined, onRejected);\n}\nfunction transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) {\n    return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n}\nfunction setPromiseIsHandledToTrue(promise) {\n    PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n}\nconst queueMicrotask = (() => {\n    const globalQueueMicrotask = globals && globals.queueMicrotask;\n    if (typeof globalQueueMicrotask === 'function') {\n        return globalQueueMicrotask;\n    }\n    const resolvedPromise = promiseResolvedWith(undefined);\n    return (fn) => PerformPromiseThen(resolvedPromise, fn);\n})();\nfunction reflectCall(F, V, args) {\n    if (typeof F !== 'function') {\n        throw new TypeError('Argument is not a function');\n    }\n    return Function.prototype.apply.call(F, V, args);\n}\nfunction promiseCall(F, V, args) {\n    try {\n        return promiseResolvedWith(reflectCall(F, V, args));\n    }\n    catch (value) {\n        return promiseRejectedWith(value);\n    }\n}\n\n// Original from Chromium\n// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\nconst QUEUE_MAX_ARRAY_SIZE = 16384;\n/**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\nclass SimpleQueue {\n    constructor() {\n        this._cursor = 0;\n        this._size = 0;\n        // _front and _back are always defined.\n        this._front = {\n            _elements: [],\n            _next: undefined\n        };\n        this._back = this._front;\n        // The cursor is used to avoid calling Array.shift().\n        // It contains the index of the front element of the array inside the\n        // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n        this._cursor = 0;\n        // When there is only one node, size === elements.length - cursor.\n        this._size = 0;\n    }\n    get length() {\n        return this._size;\n    }\n    // For exception safety, this method is structured in order:\n    // 1. Read state\n    // 2. Calculate required state mutations\n    // 3. Perform state mutations\n    push(element) {\n        const oldBack = this._back;\n        let newBack = oldBack;\n        if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n            newBack = {\n                _elements: [],\n                _next: undefined\n            };\n        }\n        // push() is the mutation most likely to throw an exception, so it\n        // goes first.\n        oldBack._elements.push(element);\n        if (newBack !== oldBack) {\n            this._back = newBack;\n            oldBack._next = newBack;\n        }\n        ++this._size;\n    }\n    // Like push(), shift() follows the read -> calculate -> mutate pattern for\n    // exception safety.\n    shift() { // must not be called on an empty queue\n        const oldFront = this._front;\n        let newFront = oldFront;\n        const oldCursor = this._cursor;\n        let newCursor = oldCursor + 1;\n        const elements = oldFront._elements;\n        const element = elements[oldCursor];\n        if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n            newFront = oldFront._next;\n            newCursor = 0;\n        }\n        // No mutations before this point.\n        --this._size;\n        this._cursor = newCursor;\n        if (oldFront !== newFront) {\n            this._front = newFront;\n        }\n        // Permit shifted element to be garbage collected.\n        elements[oldCursor] = undefined;\n        return element;\n    }\n    // The tricky thing about forEach() is that it can be called\n    // re-entrantly. The queue may be mutated inside the callback. It is easy to\n    // see that push() within the callback has no negative effects since the end\n    // of the queue is checked for on every iteration. If shift() is called\n    // repeatedly within the callback then the next iteration may return an\n    // element that has been removed. In this case the callback will be called\n    // with undefined values until we either \"catch up\" with elements that still\n    // exist or reach the back of the queue.\n    forEach(callback) {\n        let i = this._cursor;\n        let node = this._front;\n        let elements = node._elements;\n        while (i !== elements.length || node._next !== undefined) {\n            if (i === elements.length) {\n                node = node._next;\n                elements = node._elements;\n                i = 0;\n                if (elements.length === 0) {\n                    break;\n                }\n            }\n            callback(elements[i]);\n            ++i;\n        }\n    }\n    // Return the element that would be returned if shift() was called now,\n    // without modifying the queue.\n    peek() { // must not be called on an empty queue\n        const front = this._front;\n        const cursor = this._cursor;\n        return front._elements[cursor];\n    }\n}\n\nfunction ReadableStreamReaderGenericInitialize(reader, stream) {\n    reader._ownerReadableStream = stream;\n    stream._reader = reader;\n    if (stream._state === 'readable') {\n        defaultReaderClosedPromiseInitialize(reader);\n    }\n    else if (stream._state === 'closed') {\n        defaultReaderClosedPromiseInitializeAsResolved(reader);\n    }\n    else {\n        defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n    }\n}\n// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n// check.\nfunction ReadableStreamReaderGenericCancel(reader, reason) {\n    const stream = reader._ownerReadableStream;\n    return ReadableStreamCancel(stream, reason);\n}\nfunction ReadableStreamReaderGenericRelease(reader) {\n    if (reader._ownerReadableStream._state === 'readable') {\n        defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n    }\n    else {\n        defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n    }\n    reader._ownerReadableStream._reader = undefined;\n    reader._ownerReadableStream = undefined;\n}\n// Helper functions for the readers.\nfunction readerLockException(name) {\n    return new TypeError('Cannot ' + name + ' a stream using a released reader');\n}\n// Helper functions for the ReadableStreamDefaultReader.\nfunction defaultReaderClosedPromiseInitialize(reader) {\n    reader._closedPromise = newPromise((resolve, reject) => {\n        reader._closedPromise_resolve = resolve;\n        reader._closedPromise_reject = reject;\n    });\n}\nfunction defaultReaderClosedPromiseInitializeAsRejected(reader, reason) {\n    defaultReaderClosedPromiseInitialize(reader);\n    defaultReaderClosedPromiseReject(reader, reason);\n}\nfunction defaultReaderClosedPromiseInitializeAsResolved(reader) {\n    defaultReaderClosedPromiseInitialize(reader);\n    defaultReaderClosedPromiseResolve(reader);\n}\nfunction defaultReaderClosedPromiseReject(reader, reason) {\n    if (reader._closedPromise_reject === undefined) {\n        return;\n    }\n    setPromiseIsHandledToTrue(reader._closedPromise);\n    reader._closedPromise_reject(reason);\n    reader._closedPromise_resolve = undefined;\n    reader._closedPromise_reject = undefined;\n}\nfunction defaultReaderClosedPromiseResetToRejected(reader, reason) {\n    defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n}\nfunction defaultReaderClosedPromiseResolve(reader) {\n    if (reader._closedPromise_resolve === undefined) {\n        return;\n    }\n    reader._closedPromise_resolve(undefined);\n    reader._closedPromise_resolve = undefined;\n    reader._closedPromise_reject = undefined;\n}\n\nconst AbortSteps = SymbolPolyfill('[[AbortSteps]]');\nconst ErrorSteps = SymbolPolyfill('[[ErrorSteps]]');\nconst CancelSteps = SymbolPolyfill('[[CancelSteps]]');\nconst PullSteps = SymbolPolyfill('[[PullSteps]]');\n\n/// <reference lib=\"es2015.core\" />\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\nconst NumberIsFinite = Number.isFinite || function (x) {\n    return typeof x === 'number' && isFinite(x);\n};\n\n/// <reference lib=\"es2015.core\" />\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\nconst MathTrunc = Math.trunc || function (v) {\n    return v < 0 ? Math.ceil(v) : Math.floor(v);\n};\n\n// https://heycam.github.io/webidl/#idl-dictionaries\nfunction isDictionary(x) {\n    return typeof x === 'object' || typeof x === 'function';\n}\nfunction assertDictionary(obj, context) {\n    if (obj !== undefined && !isDictionary(obj)) {\n        throw new TypeError(`${context} is not an object.`);\n    }\n}\n// https://heycam.github.io/webidl/#idl-callback-functions\nfunction assertFunction(x, context) {\n    if (typeof x !== 'function') {\n        throw new TypeError(`${context} is not a function.`);\n    }\n}\n// https://heycam.github.io/webidl/#idl-object\nfunction isObject(x) {\n    return (typeof x === 'object' && x !== null) || typeof x === 'function';\n}\nfunction assertObject(x, context) {\n    if (!isObject(x)) {\n        throw new TypeError(`${context} is not an object.`);\n    }\n}\nfunction assertRequiredArgument(x, position, context) {\n    if (x === undefined) {\n        throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n    }\n}\nfunction assertRequiredField(x, field, context) {\n    if (x === undefined) {\n        throw new TypeError(`${field} is required in '${context}'.`);\n    }\n}\n// https://heycam.github.io/webidl/#idl-unrestricted-double\nfunction convertUnrestrictedDouble(value) {\n    return Number(value);\n}\nfunction censorNegativeZero(x) {\n    return x === 0 ? 0 : x;\n}\nfunction integerPart(x) {\n    return censorNegativeZero(MathTrunc(x));\n}\n// https://heycam.github.io/webidl/#idl-unsigned-long-long\nfunction convertUnsignedLongLongWithEnforceRange(value, context) {\n    const lowerBound = 0;\n    const upperBound = Number.MAX_SAFE_INTEGER;\n    let x = Number(value);\n    x = censorNegativeZero(x);\n    if (!NumberIsFinite(x)) {\n        throw new TypeError(`${context} is not a finite number`);\n    }\n    x = integerPart(x);\n    if (x < lowerBound || x > upperBound) {\n        throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n    }\n    if (!NumberIsFinite(x) || x === 0) {\n        return 0;\n    }\n    // TODO Use BigInt if supported?\n    // let xBigInt = BigInt(integerPart(x));\n    // xBigInt = BigInt.asUintN(64, xBigInt);\n    // return Number(xBigInt);\n    return x;\n}\n\nfunction assertReadableStream(x, context) {\n    if (!IsReadableStream(x)) {\n        throw new TypeError(`${context} is not a ReadableStream.`);\n    }\n}\n\n// Abstract operations for the ReadableStream.\nfunction AcquireReadableStreamDefaultReader(stream) {\n    return new ReadableStreamDefaultReader(stream);\n}\n// ReadableStream API exposed for controllers.\nfunction ReadableStreamAddReadRequest(stream, readRequest) {\n    stream._reader._readRequests.push(readRequest);\n}\nfunction ReadableStreamFulfillReadRequest(stream, chunk, done) {\n    const reader = stream._reader;\n    const readRequest = reader._readRequests.shift();\n    if (done) {\n        readRequest._closeSteps();\n    }\n    else {\n        readRequest._chunkSteps(chunk);\n    }\n}\nfunction ReadableStreamGetNumReadRequests(stream) {\n    return stream._reader._readRequests.length;\n}\nfunction ReadableStreamHasDefaultReader(stream) {\n    const reader = stream._reader;\n    if (reader === undefined) {\n        return false;\n    }\n    if (!IsReadableStreamDefaultReader(reader)) {\n        return false;\n    }\n    return true;\n}\n/**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\nclass ReadableStreamDefaultReader {\n    constructor(stream) {\n        assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n        assertReadableStream(stream, 'First parameter');\n        if (IsReadableStreamLocked(stream)) {\n            throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n        }\n        ReadableStreamReaderGenericInitialize(this, stream);\n        this._readRequests = new SimpleQueue();\n    }\n    /**\n     * Returns a promise that will be fulfilled when the stream becomes closed,\n     * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n     */\n    get closed() {\n        if (!IsReadableStreamDefaultReader(this)) {\n            return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n        }\n        return this._closedPromise;\n    }\n    /**\n     * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n     */\n    cancel(reason = undefined) {\n        if (!IsReadableStreamDefaultReader(this)) {\n            return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n        }\n        if (this._ownerReadableStream === undefined) {\n            return promiseRejectedWith(readerLockException('cancel'));\n        }\n        return ReadableStreamReaderGenericCancel(this, reason);\n    }\n    /**\n     * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n     *\n     * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n     */\n    read() {\n        if (!IsReadableStreamDefaultReader(this)) {\n            return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n        }\n        if (this._ownerReadableStream === undefined) {\n            return promiseRejectedWith(readerLockException('read from'));\n        }\n        let resolvePromise;\n        let rejectPromise;\n        const promise = newPromise((resolve, reject) => {\n            resolvePromise = resolve;\n            rejectPromise = reject;\n        });\n        const readRequest = {\n            _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n            _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n            _errorSteps: e => rejectPromise(e)\n        };\n        ReadableStreamDefaultReaderRead(this, readRequest);\n        return promise;\n    }\n    /**\n     * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n     * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n     * from now on; otherwise, the reader will appear closed.\n     *\n     * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n     * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n     * do so will throw a `TypeError` and leave the reader locked to the stream.\n     */\n    releaseLock() {\n        if (!IsReadableStreamDefaultReader(this)) {\n            throw defaultReaderBrandCheckException('releaseLock');\n        }\n        if (this._ownerReadableStream === undefined) {\n            return;\n        }\n        if (this._readRequests.length > 0) {\n            throw new TypeError('Tried to release a reader lock when that reader has pending read() calls un-settled');\n        }\n        ReadableStreamReaderGenericRelease(this);\n    }\n}\nObject.defineProperties(ReadableStreamDefaultReader.prototype, {\n    cancel: { enumerable: true },\n    read: { enumerable: true },\n    releaseLock: { enumerable: true },\n    closed: { enumerable: true }\n});\nif (typeof SymbolPolyfill.toStringTag === 'symbol') {\n    Object.defineProperty(ReadableStreamDefaultReader.prototype, SymbolPolyfill.toStringTag, {\n        value: 'ReadableStreamDefaultReader',\n        configurable: true\n    });\n}\n// Abstract operations for the readers.\nfunction IsReadableStreamDefaultReader(x) {\n    if (!typeIsObject(x)) {\n        return false;\n    }\n    if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n        return false;\n    }\n    return true;\n}\nfunction ReadableStreamDefaultReaderRead(reader, readRequest) {\n    const stream = reader._ownerReadableStream;\n    stream._disturbed = true;\n    if (stream._state === 'closed') {\n        readRequest._closeSteps();\n    }\n    else if (stream._state === 'errored') {\n        readRequest._errorSteps(stream._storedError);\n    }\n    else {\n        stream._readableStreamController[PullSteps](readRequest);\n    }\n}\n// Helper functions for the ReadableStreamDefaultReader.\nfunction defaultReaderBrandCheckException(name) {\n    return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n}\n\n/// <reference lib=\"es2018.asynciterable\" />\nlet AsyncIteratorPrototype;\nif (typeof SymbolPolyfill.asyncIterator === 'symbol') {\n    // We're running inside a ES2018+ environment, but we're compiling to an older syntax.\n    // We cannot access %AsyncIteratorPrototype% without non-ES2018 syntax, but we can re-create it.\n    AsyncIteratorPrototype = {\n        // 25.1.3.1 %AsyncIteratorPrototype% [ @@asyncIterator ] ( )\n        // https://tc39.github.io/ecma262/#sec-asynciteratorprototype-asynciterator\n        [SymbolPolyfill.asyncIterator]() {\n            return this;\n        }\n    };\n    Object.defineProperty(AsyncIteratorPrototype, SymbolPolyfill.asyncIterator, { enumerable: false });\n}\n\n/// <reference lib=\"es2018.asynciterable\" />\nclass ReadableStreamAsyncIteratorImpl {\n    constructor(reader, preventCancel) {\n        this._ongoingPromise = undefined;\n        this._isFinished = false;\n        this._reader = reader;\n        this._preventCancel = preventCancel;\n    }\n    next() {\n        const nextSteps = () => this._nextSteps();\n        this._ongoingPromise = this._ongoingPromise ?\n            transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n            nextSteps();\n        return this._ongoingPromise;\n    }\n    return(value) {\n        const returnSteps = () => this._returnSteps(value);\n        return this._ongoingPromise ?\n            transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n            returnSteps();\n    }\n    _nextSteps() {\n        if (this._isFinished) {\n            return Promise.resolve({ value: undefined, done: true });\n        }\n        const reader = this._reader;\n        if (reader._ownerReadableStream === undefined) {\n            return promiseRejectedWith(readerLockException('iterate'));\n        }\n        let resolvePromise;\n        let rejectPromise;\n        const promise = newPromise((resolve, reject) => {\n            resolvePromise = resolve;\n            rejectPromise = reject;\n        });\n        const readRequest = {\n            _chunkSteps: chunk => {\n                this._ongoingPromise = undefined;\n                // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n                // FIXME Is this a bug in the specification, or in the test?\n                queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n            },\n            _closeSteps: () => {\n                this._ongoingPromise = undefined;\n                this._isFinished = true;\n                ReadableStreamReaderGenericRelease(reader);\n                resolvePromise({ value: undefined, done: true });\n            },\n            _errorSteps: reason => {\n                this._ongoingPromise = undefined;\n                this._isFinished = true;\n                ReadableStreamReaderGenericRelease(reader);\n                rejectPromise(reason);\n            }\n        };\n        ReadableStreamDefaultReaderRead(reader, readRequest);\n        return promise;\n    }\n    _returnSteps(value) {\n        if (this._isFinished) {\n            return Promise.resolve({ value, done: true });\n        }\n        this._isFinished = true;\n        const reader = this._reader;\n        if (reader._ownerReadableStream === undefined) {\n            return promiseRejectedWith(readerLockException('finish iterating'));\n        }\n        if (!this._preventCancel) {\n            const result = ReadableStreamReaderGenericCancel(reader, value);\n            ReadableStreamReaderGenericRelease(reader);\n            return transformPromiseWith(result, () => ({ value, done: true }));\n        }\n        ReadableStreamReaderGenericRelease(reader);\n        return promiseResolvedWith({ value, done: true });\n    }\n}\nconst ReadableStreamAsyncIteratorPrototype = {\n    next() {\n        if (!IsReadableStreamAsyncIterator(this)) {\n            return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n        }\n        return this._asyncIteratorImpl.next();\n    },\n    return(value) {\n        if (!IsReadableStreamAsyncIterator(this)) {\n            return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n        }\n        return this._asyncIteratorImpl.return(value);\n    }\n};\nif (AsyncIteratorPrototype !== undefined) {\n    Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n}\n// Abstract operations for the ReadableStream.\nfunction AcquireReadableStreamAsyncIterator(stream, preventCancel) {\n    const reader = AcquireReadableStreamDefaultReader(stream);\n    const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n    const iterator = Object.create(ReadableStreamAsyncIteratorPrototype);\n    iterator._asyncIteratorImpl = impl;\n    return iterator;\n}\nfunction IsReadableStreamAsyncIterator(x) {\n    if (!typeIsObject(x)) {\n        return false;\n    }\n    if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n        return false;\n    }\n    return true;\n}\n// Helper functions for the ReadableStream.\nfunction streamAsyncIteratorBrandCheckException(name) {\n    return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n}\n\n/// <reference lib=\"es2015.core\" />\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\nconst NumberIsNaN = Number.isNaN || function (x) {\n    // eslint-disable-next-line no-self-compare\n    return x !== x;\n};\n\nfunction IsFiniteNonNegativeNumber(v) {\n    if (!IsNonNegativeNumber(v)) {\n        return false;\n    }\n    if (v === Infinity) {\n        return false;\n    }\n    return true;\n}\nfunction IsNonNegativeNumber(v) {\n    if (typeof v !== 'number') {\n        return false;\n    }\n    if (NumberIsNaN(v)) {\n        return false;\n    }\n    if (v < 0) {\n        return false;\n    }\n    return true;\n}\n\nfunction DequeueValue(container) {\n    const pair = container._queue.shift();\n    container._queueTotalSize -= pair.size;\n    if (container._queueTotalSize < 0) {\n        container._queueTotalSize = 0;\n    }\n    return pair.value;\n}\nfunction EnqueueValueWithSize(container, value, size) {\n    size = Number(size);\n    if (!IsFiniteNonNegativeNumber(size)) {\n        throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n    }\n    container._queue.push({ value, size });\n    container._queueTotalSize += size;\n}\nfunction PeekQueueValue(container) {\n    const pair = container._queue.peek();\n    return pair.value;\n}\nfunction ResetQueue(container) {\n    container._queue = new SimpleQueue();\n    container._queueTotalSize = 0;\n}\n\nfunction CreateArrayFromList(elements) {\n    // We use arrays to represent lists, so this is basically a no-op.\n    // Do a slice though just in case we happen to depend on the unique-ness.\n    return elements.slice();\n}\nfunction CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) {\n    new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n}\n// Not implemented correctly\nfunction TransferArrayBuffer(O) {\n    return O;\n}\n// Not implemented correctly\nfunction IsDetachedBuffer(O) {\n    return false;\n}\n\n/**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\nclass ReadableStreamBYOBRequest {\n    constructor() {\n        throw new TypeError('Illegal constructor');\n    }\n    /**\n     * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n     */\n    get view() {\n        if (!IsReadableStreamBYOBRequest(this)) {\n            throw byobRequestBrandCheckException('view');\n        }\n        return this._view;\n    }\n    respond(bytesWritten) {\n        if (!IsReadableStreamBYOBRequest(this)) {\n            throw byobRequestBrandCheckException('respond');\n        }\n        assertRequiredArgument(bytesWritten, 1, 'respond');\n        bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n        if (this._associatedReadableByteStreamController === undefined) {\n            throw new TypeError('This BYOB request has been invalidated');\n        }\n        if (IsDetachedBuffer(this._view.buffer)) ;\n        ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n    }\n    respondWithNewView(view) {\n        if (!IsReadableStreamBYOBRequest(this)) {\n            throw byobRequestBrandCheckException('respondWithNewView');\n        }\n        assertRequiredArgument(view, 1, 'respondWithNewView');\n        if (!ArrayBuffer.isView(view)) {\n            throw new TypeError('You can only respond with array buffer views');\n        }\n        if (view.byteLength === 0) {\n            throw new TypeError('chunk must have non-zero byteLength');\n        }\n        if (view.buffer.byteLength === 0) {\n            throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n        }\n        if (this._associatedReadableByteStreamController === undefined) {\n            throw new TypeError('This BYOB request has been invalidated');\n        }\n        ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n    }\n}\nObject.defineProperties(ReadableStreamBYOBRequest.prototype, {\n    respond: { enumerable: true },\n    respondWithNewView: { enumerable: true },\n    view: { enumerable: true }\n});\nif (typeof SymbolPolyfill.toStringTag === 'symbol') {\n    Object.defineProperty(ReadableStreamBYOBRequest.prototype, SymbolPolyfill.toStringTag, {\n        value: 'ReadableStreamBYOBRequest',\n        configurable: true\n    });\n}\n/**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\nclass ReadableByteStreamController {\n    constructor() {\n        throw new TypeError('Illegal constructor');\n    }\n    /**\n     * Returns the current BYOB pull request, or `null` if there isn't one.\n     */\n    get byobRequest() {\n        if (!IsReadableByteStreamController(this)) {\n            throw byteStreamControllerBrandCheckException('byobRequest');\n        }\n        if (this._byobRequest === null && this._pendingPullIntos.length > 0) {\n            const firstDescriptor = this._pendingPullIntos.peek();\n            const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n            const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n            SetUpReadableStreamBYOBRequest(byobRequest, this, view);\n            this._byobRequest = byobRequest;\n        }\n        return this._byobRequest;\n    }\n    /**\n     * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n     * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n     */\n    get desiredSize() {\n        if (!IsReadableByteStreamController(this)) {\n            throw byteStreamControllerBrandCheckException('desiredSize');\n        }\n        return ReadableByteStreamControllerGetDesiredSize(this);\n    }\n    /**\n     * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n     * the stream, but once those are read, the stream will become closed.\n     */\n    close() {\n        if (!IsReadableByteStreamController(this)) {\n            throw byteStreamControllerBrandCheckException('close');\n        }\n        if (this._closeRequested) {\n            throw new TypeError('The stream has already been closed; do not close it again!');\n        }\n        const state = this._controlledReadableByteStream._state;\n        if (state !== 'readable') {\n            throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n        }\n        ReadableByteStreamControllerClose(this);\n    }\n    enqueue(chunk) {\n        if (!IsReadableByteStreamController(this)) {\n            throw byteStreamControllerBrandCheckException('enqueue');\n        }\n        assertRequiredArgument(chunk, 1, 'enqueue');\n        if (!ArrayBuffer.isView(chunk)) {\n            throw new TypeError('chunk must be an array buffer view');\n        }\n        if (chunk.byteLength === 0) {\n            throw new TypeError('chunk must have non-zero byteLength');\n        }\n        if (chunk.buffer.byteLength === 0) {\n            throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n        }\n        if (this._closeRequested) {\n            throw new TypeError('stream is closed or draining');\n        }\n        const state = this._controlledReadableByteStream._state;\n        if (state !== 'readable') {\n            throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n        }\n        ReadableByteStreamControllerEnqueue(this, chunk);\n    }\n    /**\n     * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n     */\n    error(e = undefined) {\n        if (!IsReadableByteStreamController(this)) {\n            throw byteStreamControllerBrandCheckException('error');\n        }\n        ReadableByteStreamControllerError(this, e);\n    }\n    /** @internal */\n    [CancelSteps](reason) {\n        if (this._pendingPullIntos.length > 0) {\n            const firstDescriptor = this._pendingPullIntos.peek();\n            firstDescriptor.bytesFilled = 0;\n        }\n        ResetQueue(this);\n        const result = this._cancelAlgorithm(reason);\n        ReadableByteStreamControllerClearAlgorithms(this);\n        return result;\n    }\n    /** @internal */\n    [PullSteps](readRequest) {\n        const stream = this._controlledReadableByteStream;\n        if (this._queueTotalSize > 0) {\n            const entry = this._queue.shift();\n            this._queueTotalSize -= entry.byteLength;\n            ReadableByteStreamControllerHandleQueueDrain(this);\n            const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n            readRequest._chunkSteps(view);\n            return;\n        }\n        const autoAllocateChunkSize = this._autoAllocateChunkSize;\n        if (autoAllocateChunkSize !== undefined) {\n            let buffer;\n            try {\n                buffer = new ArrayBuffer(autoAllocateChunkSize);\n            }\n            catch (bufferE) {\n                readRequest._errorSteps(bufferE);\n                return;\n            }\n            const pullIntoDescriptor = {\n                buffer,\n                byteOffset: 0,\n                byteLength: autoAllocateChunkSize,\n                bytesFilled: 0,\n                elementSize: 1,\n                viewConstructor: Uint8Array,\n                readerType: 'default'\n            };\n            this._pendingPullIntos.push(pullIntoDescriptor);\n        }\n        ReadableStreamAddReadRequest(stream, readRequest);\n        ReadableByteStreamControllerCallPullIfNeeded(this);\n    }\n}\nObject.defineProperties(ReadableByteStreamController.prototype, {\n    close: { enumerable: true },\n    enqueue: { enumerable: true },\n    error: { enumerable: true },\n    byobRequest: { enumerable: true },\n    desiredSize: { enumerable: true }\n});\nif (typeof SymbolPolyfill.toStringTag === 'symbol') {\n    Object.defineProperty(ReadableByteStreamController.prototype, SymbolPolyfill.toStringTag, {\n        value: 'ReadableByteStreamController',\n        configurable: true\n    });\n}\n// Abstract operations for the ReadableByteStreamController.\nfunction IsReadableByteStreamController(x) {\n    if (!typeIsObject(x)) {\n        return false;\n    }\n    if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n        return false;\n    }\n    return true;\n}\nfunction IsReadableStreamBYOBRequest(x) {\n    if (!typeIsObject(x)) {\n        return false;\n    }\n    if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n        return false;\n    }\n    return true;\n}\nfunction ReadableByteStreamControllerCallPullIfNeeded(controller) {\n    const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n    if (!shouldPull) {\n        return;\n    }\n    if (controller._pulling) {\n        controller._pullAgain = true;\n        return;\n    }\n    controller._pulling = true;\n    // TODO: Test controller argument\n    const pullPromise = controller._pullAlgorithm();\n    uponPromise(pullPromise, () => {\n        controller._pulling = false;\n        if (controller._pullAgain) {\n            controller._pullAgain = false;\n            ReadableByteStreamControllerCallPullIfNeeded(controller);\n        }\n    }, e => {\n        ReadableByteStreamControllerError(controller, e);\n    });\n}\nfunction ReadableByteStreamControllerClearPendingPullIntos(controller) {\n    ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n    controller._pendingPullIntos = new SimpleQueue();\n}\nfunction ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) {\n    let done = false;\n    if (stream._state === 'closed') {\n        done = true;\n    }\n    const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n    if (pullIntoDescriptor.readerType === 'default') {\n        ReadableStreamFulfillReadRequest(stream, filledView, done);\n    }\n    else {\n        ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n    }\n}\nfunction ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) {\n    const bytesFilled = pullIntoDescriptor.bytesFilled;\n    const elementSize = pullIntoDescriptor.elementSize;\n    return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize);\n}\nfunction ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) {\n    controller._queue.push({ buffer, byteOffset, byteLength });\n    controller._queueTotalSize += byteLength;\n}\nfunction ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) {\n    const elementSize = pullIntoDescriptor.elementSize;\n    const currentAlignedBytes = pullIntoDescriptor.bytesFilled - pullIntoDescriptor.bytesFilled % elementSize;\n    const maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n    const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n    const maxAlignedBytes = maxBytesFilled - maxBytesFilled % elementSize;\n    let totalBytesToCopyRemaining = maxBytesToCopy;\n    let ready = false;\n    if (maxAlignedBytes > currentAlignedBytes) {\n        totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n        ready = true;\n    }\n    const queue = controller._queue;\n    while (totalBytesToCopyRemaining > 0) {\n        const headOfQueue = queue.peek();\n        const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n        const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n        CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n        if (headOfQueue.byteLength === bytesToCopy) {\n            queue.shift();\n        }\n        else {\n            headOfQueue.byteOffset += bytesToCopy;\n            headOfQueue.byteLength -= bytesToCopy;\n        }\n        controller._queueTotalSize -= bytesToCopy;\n        ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n        totalBytesToCopyRemaining -= bytesToCopy;\n    }\n    return ready;\n}\nfunction ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) {\n    ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n    pullIntoDescriptor.bytesFilled += size;\n}\nfunction ReadableByteStreamControllerHandleQueueDrain(controller) {\n    if (controller._queueTotalSize === 0 && controller._closeRequested) {\n        ReadableByteStreamControllerClearAlgorithms(controller);\n        ReadableStreamClose(controller._controlledReadableByteStream);\n    }\n    else {\n        ReadableByteStreamControllerCallPullIfNeeded(controller);\n    }\n}\nfunction ReadableByteStreamControllerInvalidateBYOBRequest(controller) {\n    if (controller._byobRequest === null) {\n        return;\n    }\n    controller._byobRequest._associatedReadableByteStreamController = undefined;\n    controller._byobRequest._view = null;\n    controller._byobRequest = null;\n}\nfunction ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) {\n    while (controller._pendingPullIntos.length > 0) {\n        if (controller._queueTotalSize === 0) {\n            return;\n        }\n        const pullIntoDescriptor = controller._pendingPullIntos.peek();\n        if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n            ReadableByteStreamControllerShiftPendingPullInto(controller);\n            ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n        }\n    }\n}\nfunction ReadableByteStreamControllerPullInto(controller, view, readIntoRequest) {\n    const stream = controller._controlledReadableByteStream;\n    let elementSize = 1;\n    if (view.constructor !== DataView) {\n        elementSize = view.constructor.BYTES_PER_ELEMENT;\n    }\n    const ctor = view.constructor;\n    const buffer = TransferArrayBuffer(view.buffer);\n    const pullIntoDescriptor = {\n        buffer,\n        byteOffset: view.byteOffset,\n        byteLength: view.byteLength,\n        bytesFilled: 0,\n        elementSize,\n        viewConstructor: ctor,\n        readerType: 'byob'\n    };\n    if (controller._pendingPullIntos.length > 0) {\n        controller._pendingPullIntos.push(pullIntoDescriptor);\n        // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n        // - No change happens on desiredSize\n        // - The source has already been notified of that there's at least 1 pending read(view)\n        ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n        return;\n    }\n    if (stream._state === 'closed') {\n        const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n        readIntoRequest._closeSteps(emptyView);\n        return;\n    }\n    if (controller._queueTotalSize > 0) {\n        if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n            const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n            ReadableByteStreamControllerHandleQueueDrain(controller);\n            readIntoRequest._chunkSteps(filledView);\n            return;\n        }\n        if (controller._closeRequested) {\n            const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n            ReadableByteStreamControllerError(controller, e);\n            readIntoRequest._errorSteps(e);\n            return;\n        }\n    }\n    controller._pendingPullIntos.push(pullIntoDescriptor);\n    ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n    ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\nfunction ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) {\n    firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n    const stream = controller._controlledReadableByteStream;\n    if (ReadableStreamHasBYOBReader(stream)) {\n        while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n            const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n            ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n        }\n    }\n}\nfunction ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) {\n    if (pullIntoDescriptor.bytesFilled + bytesWritten > pullIntoDescriptor.byteLength) {\n        throw new RangeError('bytesWritten out of range');\n    }\n    ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n    if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.elementSize) {\n        // TODO: Figure out whether we should detach the buffer or not here.\n        return;\n    }\n    ReadableByteStreamControllerShiftPendingPullInto(controller);\n    const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n    if (remainderSize > 0) {\n        const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n        const remainder = pullIntoDescriptor.buffer.slice(end - remainderSize, end);\n        ReadableByteStreamControllerEnqueueChunkToQueue(controller, remainder, 0, remainder.byteLength);\n    }\n    pullIntoDescriptor.buffer = TransferArrayBuffer(pullIntoDescriptor.buffer);\n    pullIntoDescriptor.bytesFilled -= remainderSize;\n    ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n    ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n}\nfunction ReadableByteStreamControllerRespondInternal(controller, bytesWritten) {\n    const firstDescriptor = controller._pendingPullIntos.peek();\n    const state = controller._controlledReadableByteStream._state;\n    if (state === 'closed') {\n        if (bytesWritten !== 0) {\n            throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n        }\n        ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n    }\n    else {\n        ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n    }\n    ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\nfunction ReadableByteStreamControllerShiftPendingPullInto(controller) {\n    const descriptor = controller._pendingPullIntos.shift();\n    ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n    return descriptor;\n}\nfunction ReadableByteStreamControllerShouldCallPull(controller) {\n    const stream = controller._controlledReadableByteStream;\n    if (stream._state !== 'readable') {\n        return false;\n    }\n    if (controller._closeRequested) {\n        return false;\n    }\n    if (!controller._started) {\n        return false;\n    }\n    if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n        return true;\n    }\n    if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n        return true;\n    }\n    const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n    if (desiredSize > 0) {\n        return true;\n    }\n    return false;\n}\nfunction ReadableByteStreamControllerClearAlgorithms(controller) {\n    controller._pullAlgorithm = undefined;\n    controller._cancelAlgorithm = undefined;\n}\n// A client of ReadableByteStreamController may use these functions directly to bypass state check.\nfunction ReadableByteStreamControllerClose(controller) {\n    const stream = controller._controlledReadableByteStream;\n    if (controller._closeRequested || stream._state !== 'readable') {\n        return;\n    }\n    if (controller._queueTotalSize > 0) {\n        controller._closeRequested = true;\n        return;\n    }\n    if (controller._pendingPullIntos.length > 0) {\n        const firstPendingPullInto = controller._pendingPullIntos.peek();\n        if (firstPendingPullInto.bytesFilled > 0) {\n            const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n            ReadableByteStreamControllerError(controller, e);\n            throw e;\n        }\n    }\n    ReadableByteStreamControllerClearAlgorithms(controller);\n    ReadableStreamClose(stream);\n}\nfunction ReadableByteStreamControllerEnqueue(controller, chunk) {\n    const stream = controller._controlledReadableByteStream;\n    if (controller._closeRequested || stream._state !== 'readable') {\n        return;\n    }\n    const buffer = chunk.buffer;\n    const byteOffset = chunk.byteOffset;\n    const byteLength = chunk.byteLength;\n    const transferredBuffer = TransferArrayBuffer(buffer);\n    if (ReadableStreamHasDefaultReader(stream)) {\n        if (ReadableStreamGetNumReadRequests(stream) === 0) {\n            ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n        }\n        else {\n            const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n            ReadableStreamFulfillReadRequest(stream, transferredView, false);\n        }\n    }\n    else if (ReadableStreamHasBYOBReader(stream)) {\n        // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n        ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n        ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n    }\n    else {\n        ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n    }\n    ReadableByteStreamControllerCallPullIfNeeded(controller);\n}\nfunction ReadableByteStreamControllerError(controller, e) {\n    const stream = controller._controlledReadableByteStream;\n    if (stream._state !== 'readable') {\n        return;\n    }\n    ReadableByteStreamControllerClearPendingPullIntos(controller);\n    ResetQueue(controller);\n    ReadableByteStreamControllerClearAlgorithms(controller);\n    ReadableStreamError(stream, e);\n}\nfunction ReadableByteStreamControllerGetDesiredSize(controller) {\n    const state = controller._controlledReadableByteStream._state;\n    if (state === 'errored') {\n        return null;\n    }\n    if (state === 'closed') {\n        return 0;\n    }\n    return controller._strategyHWM - controller._queueTotalSize;\n}\nfunction ReadableByteStreamControllerRespond(controller, bytesWritten) {\n    bytesWritten = Number(bytesWritten);\n    if (!IsFiniteNonNegativ