diff --git a/elide/runtime/js/polyfills/BUILD.bazel b/elide/runtime/js/polyfills/BUILD.bazel index 2f4bc5d..a1fc519 100644 --- a/elide/runtime/js/polyfills/BUILD.bazel +++ b/elide/runtime/js/polyfills/BUILD.bazel @@ -15,7 +15,7 @@ package( POLYFILLS = { "abort-controller": ["abort-controller.js"], - "buffer": ["base64.js", "buffer.js", "ieee754.js"], + "buffer": ["base64.js", "ieee754.js"], "once": ["once.js"], "readable-stream": ["readable-stream.mjs"], # --- Disabled (Implemented Natively) ------- diff --git a/elide/runtime/js/polyfills/buffer.js b/elide/runtime/js/polyfills/buffer.js deleted file mode 100644 index c57b459..0000000 --- a/elide/runtime/js/polyfills/buffer.js +++ /dev/null @@ -1,2113 +0,0 @@ -/*! - * The buffer module from node.js, for the browser. - * - * @author Feross Aboukhadijeh - * @license MIT - */ -/* eslint-disable no-proto */ - -'use strict' - -import base64 from './base64'; -import ieee754 from './ieee754'; - -const customInspectSymbol = - (typeof Symbol === 'function' && typeof Symbol['for'] === 'function') // eslint-disable-line dot-notation - ? Symbol['for']('nodejs.util.inspect.custom') // eslint-disable-line dot-notation - : null - -const K_MAX_LENGTH = 0x7fffffff; -const INSPECT_MAX_BYTES = 50; - -/** - * If `Buffer.TYPED_ARRAY_SUPPORT`: - * === true Use Uint8Array implementation (fastest) - * === false Print warning and recommend using `buffer` v4.x which has an Object - * implementation (most compatible, even IE6) - * - * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+, - * Opera 11.6+, iOS 4.2+. - * - * We report that the browser does not support typed arrays if the are not subclassable - * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array` - * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support - * for __proto__ and has a buggy typed array implementation. - */ -Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport() - -if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' && - typeof console.error === 'function') { - console.error( - 'This browser lacks typed array (Uint8Array) support which is required by ' + - '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.' - ) -} - -function typedArraySupport () { - // Can typed array instances can be augmented? - try { - const arr = new Uint8Array(1) - const proto = { foo: function () { return 42 } } - Object.setPrototypeOf(proto, Uint8Array.prototype) - Object.setPrototypeOf(arr, proto) - return arr.foo() === 42 - } catch (e) { - return false - } -} - -Object.defineProperty(Buffer.prototype, 'parent', { - enumerable: true, - get: function () { - if (!Buffer.isBuffer(this)) return undefined - return this.buffer - } -}) - -Object.defineProperty(Buffer.prototype, 'offset', { - enumerable: true, - get: function () { - if (!Buffer.isBuffer(this)) return undefined - return this.byteOffset - } -}) - -function createBuffer (length) { - if (length > K_MAX_LENGTH) { - throw new RangeError('The value "' + length + '" is invalid for option "size"') - } - // Return an augmented `Uint8Array` instance - const buf = new Uint8Array(length) - Object.setPrototypeOf(buf, Buffer.prototype) - return buf -} - -/** - * The Buffer constructor returns instances of `Uint8Array` that have their - * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of - * `Uint8Array`, so the returned instances will have all the node `Buffer` methods - * and the `Uint8Array` methods. Square bracket notation works as expected -- it - * returns a single octet. - * - * The `Uint8Array` prototype remains unmodified. - */ - -function Buffer (arg, encodingOrOffset, length) { - // Common case. - if (typeof arg === 'number') { - if (typeof encodingOrOffset === 'string') { - throw new TypeError( - 'The "string" argument must be of type string. Received type number' - ) - } - return allocUnsafe(arg) - } - return from(arg, encodingOrOffset, length) -} - -Buffer.poolSize = 8192 // not used by this implementation - -function from (value, encodingOrOffset, length) { - if (typeof value === 'string') { - return fromString(value, encodingOrOffset) - } - - if (ArrayBuffer.isView(value)) { - return fromArrayView(value) - } - - if (value == null) { - throw new TypeError( - 'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' + - 'or Array-like Object. Received type ' + (typeof value) - ) - } - - if (isInstance(value, ArrayBuffer) || - (value && isInstance(value.buffer, ArrayBuffer))) { - return fromArrayBuffer(value, encodingOrOffset, length) - } - - if (typeof SharedArrayBuffer !== 'undefined' && - (isInstance(value, SharedArrayBuffer) || - (value && isInstance(value.buffer, SharedArrayBuffer)))) { - return fromArrayBuffer(value, encodingOrOffset, length) - } - - if (typeof value === 'number') { - throw new TypeError( - 'The "value" argument must not be of type number. Received type number' - ) - } - - const valueOf = value.valueOf && value.valueOf() - if (valueOf != null && valueOf !== value) { - return Buffer.from(valueOf, encodingOrOffset, length) - } - - const b = fromObject(value) - if (b) return b - - if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null && - typeof value[Symbol.toPrimitive] === 'function') { - return Buffer.from(value[Symbol.toPrimitive]('string'), encodingOrOffset, length) - } - - throw new TypeError( - 'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' + - 'or Array-like Object. Received type ' + (typeof value) - ) -} - -/** - * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError - * if value is a number. - * Buffer.from(str[, encoding]) - * Buffer.from(array) - * Buffer.from(buffer) - * Buffer.from(arrayBuffer[, byteOffset[, length]]) - **/ -Buffer.from = function (value, encodingOrOffset, length) { - return from(value, encodingOrOffset, length) -} - -// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug: -// https://github.com/feross/buffer/pull/148 -Object.setPrototypeOf(Buffer.prototype, Uint8Array.prototype) -Object.setPrototypeOf(Buffer, Uint8Array) - -function assertSize (size) { - if (typeof size !== 'number') { - throw new TypeError('"size" argument must be of type number') - } else if (size < 0) { - throw new RangeError('The value "' + size + '" is invalid for option "size"') - } -} - -function alloc (size, fill, encoding) { - assertSize(size) - if (size <= 0) { - return createBuffer(size) - } - if (fill !== undefined) { - // Only pay attention to encoding if it's a string. This - // prevents accidentally sending in a number that would - // be interpreted as a start offset. - return typeof encoding === 'string' - ? createBuffer(size).fill(fill, encoding) - : createBuffer(size).fill(fill) - } - return createBuffer(size) -} - -/** - * Creates a new filled Buffer instance. - * alloc(size[, fill[, encoding]]) - **/ -Buffer.alloc = function (size, fill, encoding) { - return alloc(size, fill, encoding) -} - -function allocUnsafe (size) { - assertSize(size) - return createBuffer(size < 0 ? 0 : checked(size) | 0) -} - -/** - * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance. - * */ -Buffer.allocUnsafe = function (size) { - return allocUnsafe(size) -} -/** - * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance. - */ -Buffer.allocUnsafeSlow = function (size) { - return allocUnsafe(size) -} - -function fromString (string, encoding) { - if (typeof encoding !== 'string' || encoding === '') { - encoding = 'utf8' - } - - if (!Buffer.isEncoding(encoding)) { - throw new TypeError('Unknown encoding: ' + encoding) - } - - const length = byteLength(string, encoding) | 0 - let buf = createBuffer(length) - - const actual = buf.write(string, encoding) - - if (actual !== length) { - // Writing a hex string, for example, that contains invalid characters will - // cause everything after the first invalid character to be ignored. (e.g. - // 'abxxcd' will be treated as 'ab') - buf = buf.slice(0, actual) - } - - return buf -} - -function fromArrayLike (array) { - const length = array.length < 0 ? 0 : checked(array.length) | 0 - const buf = createBuffer(length) - for (let i = 0; i < length; i += 1) { - buf[i] = array[i] & 255 - } - return buf -} - -function fromArrayView (arrayView) { - if (isInstance(arrayView, Uint8Array)) { - const copy = new Uint8Array(arrayView) - return fromArrayBuffer(copy.buffer, copy.byteOffset, copy.byteLength) - } - return fromArrayLike(arrayView) -} - -function fromArrayBuffer (array, byteOffset, length) { - if (byteOffset < 0 || array.byteLength < byteOffset) { - throw new RangeError('"offset" is outside of buffer bounds') - } - - if (array.byteLength < byteOffset + (length || 0)) { - throw new RangeError('"length" is outside of buffer bounds') - } - - let buf - if (byteOffset === undefined && length === undefined) { - buf = new Uint8Array(array) - } else if (length === undefined) { - buf = new Uint8Array(array, byteOffset) - } else { - buf = new Uint8Array(array, byteOffset, length) - } - - // Return an augmented `Uint8Array` instance - Object.setPrototypeOf(buf, Buffer.prototype) - - return buf -} - -function fromObject (obj) { - if (Buffer.isBuffer(obj)) { - const len = checked(obj.length) | 0 - const buf = createBuffer(len) - - if (buf.length === 0) { - return buf - } - - obj.copy(buf, 0, 0, len) - return buf - } - - if (obj.length !== undefined) { - if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) { - return createBuffer(0) - } - return fromArrayLike(obj) - } - - if (obj.type === 'Buffer' && Array.isArray(obj.data)) { - return fromArrayLike(obj.data) - } -} - -function checked (length) { - // Note: cannot use `length < K_MAX_LENGTH` here because that fails when - // length is NaN (which is otherwise coerced to zero.) - if (length >= K_MAX_LENGTH) { - throw new RangeError('Attempt to allocate Buffer larger than maximum ' + - 'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes') - } - return length | 0 -} - -function SlowBuffer (length) { - if (+length != length) { // eslint-disable-line eqeqeq - length = 0 - } - return Buffer.alloc(+length) -} - -Buffer.isBuffer = function isBuffer (b) { - return b != null && b._isBuffer === true && - b !== Buffer.prototype // so Buffer.isBuffer(Buffer.prototype) will be false -} - -Buffer.compare = function compare (a, b) { - if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength) - if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength) - if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) { - throw new TypeError( - 'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array' - ) - } - - if (a === b) return 0 - - let x = a.length - let y = b.length - - for (let i = 0, len = Math.min(x, y); i < len; ++i) { - if (a[i] !== b[i]) { - x = a[i] - y = b[i] - break - } - } - - if (x < y) return -1 - if (y < x) return 1 - return 0 -} - -Buffer.isEncoding = function isEncoding (encoding) { - switch (String(encoding).toLowerCase()) { - case 'hex': - case 'utf8': - case 'utf-8': - case 'ascii': - case 'latin1': - case 'binary': - case 'base64': - case 'ucs2': - case 'ucs-2': - case 'utf16le': - case 'utf-16le': - return true - default: - return false - } -} - -Buffer.concat = function concat (list, length) { - if (!Array.isArray(list)) { - throw new TypeError('"list" argument must be an Array of Buffers') - } - - if (list.length === 0) { - return Buffer.alloc(0) - } - - let i - if (length === undefined) { - length = 0 - for (i = 0; i < list.length; ++i) { - length += list[i].length - } - } - - const buffer = Buffer.allocUnsafe(length) - let pos = 0 - for (i = 0; i < list.length; ++i) { - let buf = list[i] - if (isInstance(buf, Uint8Array)) { - if (pos + buf.length > buffer.length) { - if (!Buffer.isBuffer(buf)) buf = Buffer.from(buf) - buf.copy(buffer, pos) - } else { - Uint8Array.prototype.set.call( - buffer, - buf, - pos - ) - } - } else if (!Buffer.isBuffer(buf)) { - throw new TypeError('"list" argument must be an Array of Buffers') - } else { - buf.copy(buffer, pos) - } - pos += buf.length - } - return buffer -} - -function byteLength (string, encoding) { - if (Buffer.isBuffer(string)) { - return string.length - } - if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) { - return string.byteLength - } - if (typeof string !== 'string') { - throw new TypeError( - 'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' + - 'Received type ' + typeof string - ) - } - - const len = string.length - const mustMatch = (arguments.length > 2 && arguments[2] === true) - if (!mustMatch && len === 0) return 0 - - // Use a for loop to avoid recursion - let loweredCase = false - for (;;) { - switch (encoding) { - case 'ascii': - case 'latin1': - case 'binary': - return len - case 'utf8': - case 'utf-8': - return utf8ToBytes(string).length - case 'ucs2': - case 'ucs-2': - case 'utf16le': - case 'utf-16le': - return len * 2 - case 'hex': - return len >>> 1 - case 'base64': - return base64ToBytes(string).length - default: - if (loweredCase) { - return mustMatch ? -1 : utf8ToBytes(string).length // assume utf8 - } - encoding = ('' + encoding).toLowerCase() - loweredCase = true - } - } -} -Buffer.byteLength = byteLength - -function slowToString (encoding, start, end) { - let loweredCase = false - - // No need to verify that "this.length <= MAX_UINT32" since it's a read-only - // property of a typed array. - - // This behaves neither like String nor Uint8Array in that we set start/end - // to their upper/lower bounds if the value passed is out of range. - // undefined is handled specially as per ECMA-262 6th Edition, - // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization. - if (start === undefined || start < 0) { - start = 0 - } - // Return early if start > this.length. Done here to prevent potential uint32 - // coercion fail below. - if (start > this.length) { - return '' - } - - if (end === undefined || end > this.length) { - end = this.length - } - - if (end <= 0) { - return '' - } - - // Force coercion to uint32. This will also coerce falsey/NaN values to 0. - end >>>= 0 - start >>>= 0 - - if (end <= start) { - return '' - } - - if (!encoding) encoding = 'utf8' - - while (true) { - switch (encoding) { - case 'hex': - return hexSlice(this, start, end) - - case 'utf8': - case 'utf-8': - return utf8Slice(this, start, end) - - case 'ascii': - return asciiSlice(this, start, end) - - case 'latin1': - case 'binary': - return latin1Slice(this, start, end) - - case 'base64': - return base64Slice(this, start, end) - - case 'ucs2': - case 'ucs-2': - case 'utf16le': - case 'utf-16le': - return utf16leSlice(this, start, end) - - default: - if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding) - encoding = (encoding + '').toLowerCase() - loweredCase = true - } - } -} - -// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package) -// to detect a Buffer instance. It's not possible to use `instanceof Buffer` -// reliably in a browserify context because there could be multiple different -// copies of the 'buffer' package in use. This method works even for Buffer -// instances that were created from another copy of the `buffer` package. -// See: https://github.com/feross/buffer/issues/154 -Buffer.prototype._isBuffer = true - -function swap (b, n, m) { - const i = b[n] - b[n] = b[m] - b[m] = i -} - -Buffer.prototype.swap16 = function swap16 () { - const len = this.length - if (len % 2 !== 0) { - throw new RangeError('Buffer size must be a multiple of 16-bits') - } - for (let i = 0; i < len; i += 2) { - swap(this, i, i + 1) - } - return this -} - -Buffer.prototype.swap32 = function swap32 () { - const len = this.length - if (len % 4 !== 0) { - throw new RangeError('Buffer size must be a multiple of 32-bits') - } - for (let i = 0; i < len; i += 4) { - swap(this, i, i + 3) - swap(this, i + 1, i + 2) - } - return this -} - -Buffer.prototype.swap64 = function swap64 () { - const len = this.length - if (len % 8 !== 0) { - throw new RangeError('Buffer size must be a multiple of 64-bits') - } - for (let i = 0; i < len; i += 8) { - swap(this, i, i + 7) - swap(this, i + 1, i + 6) - swap(this, i + 2, i + 5) - swap(this, i + 3, i + 4) - } - return this -} - -Buffer.prototype.toString = function toString () { - const length = this.length - if (length === 0) return '' - if (arguments.length === 0) return utf8Slice(this, 0, length) - return slowToString.apply(this, arguments) -} - -Buffer.prototype.toLocaleString = Buffer.prototype.toString - -Buffer.prototype.equals = function equals (b) { - if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer') - if (this === b) return true - return Buffer.compare(this, b) === 0 -} - -Buffer.prototype.inspect = function inspect () { - let str = '' - const max = INSPECT_MAX_BYTES; - str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim() - if (this.length > max) str += ' ... ' - return '' -} -if (customInspectSymbol) { - Buffer.prototype[customInspectSymbol] = Buffer.prototype.inspect -} - -Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) { - if (isInstance(target, Uint8Array)) { - target = Buffer.from(target, target.offset, target.byteLength) - } - if (!Buffer.isBuffer(target)) { - throw new TypeError( - 'The "target" argument must be one of type Buffer or Uint8Array. ' + - 'Received type ' + (typeof target) - ) - } - - if (start === undefined) { - start = 0 - } - if (end === undefined) { - end = target ? target.length : 0 - } - if (thisStart === undefined) { - thisStart = 0 - } - if (thisEnd === undefined) { - thisEnd = this.length - } - - if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) { - throw new RangeError('out of range index') - } - - if (thisStart >= thisEnd && start >= end) { - return 0 - } - if (thisStart >= thisEnd) { - return -1 - } - if (start >= end) { - return 1 - } - - start >>>= 0 - end >>>= 0 - thisStart >>>= 0 - thisEnd >>>= 0 - - if (this === target) return 0 - - let x = thisEnd - thisStart - let y = end - start - const len = Math.min(x, y) - - const thisCopy = this.slice(thisStart, thisEnd) - const targetCopy = target.slice(start, end) - - for (let i = 0; i < len; ++i) { - if (thisCopy[i] !== targetCopy[i]) { - x = thisCopy[i] - y = targetCopy[i] - break - } - } - - if (x < y) return -1 - if (y < x) return 1 - return 0 -} - -// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`, -// OR the last index of `val` in `buffer` at offset <= `byteOffset`. -// -// Arguments: -// - buffer - a Buffer to search -// - val - a string, Buffer, or number -// - byteOffset - an index into `buffer`; will be clamped to an int32 -// - encoding - an optional encoding, relevant is val is a string -// - dir - true for indexOf, false for lastIndexOf -function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) { - // Empty buffer means no match - if (buffer.length === 0) return -1 - - // Normalize byteOffset - if (typeof byteOffset === 'string') { - encoding = byteOffset - byteOffset = 0 - } else if (byteOffset > 0x7fffffff) { - byteOffset = 0x7fffffff - } else if (byteOffset < -0x80000000) { - byteOffset = -0x80000000 - } - byteOffset = +byteOffset // Coerce to Number. - if (numberIsNaN(byteOffset)) { - // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer - byteOffset = dir ? 0 : (buffer.length - 1) - } - - // Normalize byteOffset: negative offsets start from the end of the buffer - if (byteOffset < 0) byteOffset = buffer.length + byteOffset - if (byteOffset >= buffer.length) { - if (dir) return -1 - else byteOffset = buffer.length - 1 - } else if (byteOffset < 0) { - if (dir) byteOffset = 0 - else return -1 - } - - // Normalize val - if (typeof val === 'string') { - val = Buffer.from(val, encoding) - } - - // Finally, search either indexOf (if dir is true) or lastIndexOf - if (Buffer.isBuffer(val)) { - // Special case: looking for empty string/buffer always fails - if (val.length === 0) { - return -1 - } - return arrayIndexOf(buffer, val, byteOffset, encoding, dir) - } else if (typeof val === 'number') { - val = val & 0xFF // Search for a byte value [0-255] - if (typeof Uint8Array.prototype.indexOf === 'function') { - if (dir) { - return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset) - } else { - return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset) - } - } - return arrayIndexOf(buffer, [val], byteOffset, encoding, dir) - } - - throw new TypeError('val must be string, number or Buffer') -} - -function arrayIndexOf (arr, val, byteOffset, encoding, dir) { - let indexSize = 1 - let arrLength = arr.length - let valLength = val.length - - if (encoding !== undefined) { - encoding = String(encoding).toLowerCase() - if (encoding === 'ucs2' || encoding === 'ucs-2' || - encoding === 'utf16le' || encoding === 'utf-16le') { - if (arr.length < 2 || val.length < 2) { - return -1 - } - indexSize = 2 - arrLength /= 2 - valLength /= 2 - byteOffset /= 2 - } - } - - function read (buf, i) { - if (indexSize === 1) { - return buf[i] - } else { - return buf.readUInt16BE(i * indexSize) - } - } - - let i - if (dir) { - let foundIndex = -1 - for (i = byteOffset; i < arrLength; i++) { - if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) { - if (foundIndex === -1) foundIndex = i - if (i - foundIndex + 1 === valLength) return foundIndex * indexSize - } else { - if (foundIndex !== -1) i -= i - foundIndex - foundIndex = -1 - } - } - } else { - if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength - for (i = byteOffset; i >= 0; i--) { - let found = true - for (let j = 0; j < valLength; j++) { - if (read(arr, i + j) !== read(val, j)) { - found = false - break - } - } - if (found) return i - } - } - - return -1 -} - -Buffer.prototype.includes = function includes (val, byteOffset, encoding) { - return this.indexOf(val, byteOffset, encoding) !== -1 -} - -Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) { - return bidirectionalIndexOf(this, val, byteOffset, encoding, true) -} - -Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) { - return bidirectionalIndexOf(this, val, byteOffset, encoding, false) -} - -function hexWrite (buf, string, offset, length) { - offset = Number(offset) || 0 - const remaining = buf.length - offset - if (!length) { - length = remaining - } else { - length = Number(length) - if (length > remaining) { - length = remaining - } - } - - const strLen = string.length - - if (length > strLen / 2) { - length = strLen / 2 - } - let i - for (i = 0; i < length; ++i) { - const parsed = parseInt(string.substr(i * 2, 2), 16) - if (numberIsNaN(parsed)) return i - buf[offset + i] = parsed - } - return i -} - -function utf8Write (buf, string, offset, length) { - return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length) -} - -function asciiWrite (buf, string, offset, length) { - return blitBuffer(asciiToBytes(string), buf, offset, length) -} - -function base64Write (buf, string, offset, length) { - return blitBuffer(base64ToBytes(string), buf, offset, length) -} - -function ucs2Write (buf, string, offset, length) { - return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length) -} - -Buffer.prototype.write = function write (string, offset, length, encoding) { - // Buffer#write(string) - if (offset === undefined) { - encoding = 'utf8' - length = this.length - offset = 0 - // Buffer#write(string, encoding) - } else if (length === undefined && typeof offset === 'string') { - encoding = offset - length = this.length - offset = 0 - // Buffer#write(string, offset[, length][, encoding]) - } else if (isFinite(offset)) { - offset = offset >>> 0 - if (isFinite(length)) { - length = length >>> 0 - if (encoding === undefined) encoding = 'utf8' - } else { - encoding = length - length = undefined - } - } else { - throw new Error( - 'Buffer.write(string, encoding, offset[, length]) is no longer supported' - ) - } - - const remaining = this.length - offset - if (length === undefined || length > remaining) length = remaining - - if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) { - throw new RangeError('Attempt to write outside buffer bounds') - } - - if (!encoding) encoding = 'utf8' - - let loweredCase = false - for (;;) { - switch (encoding) { - case 'hex': - return hexWrite(this, string, offset, length) - - case 'utf8': - case 'utf-8': - return utf8Write(this, string, offset, length) - - case 'ascii': - case 'latin1': - case 'binary': - return asciiWrite(this, string, offset, length) - - case 'base64': - // Warning: maxLength not taken into account in base64Write - return base64Write(this, string, offset, length) - - case 'ucs2': - case 'ucs-2': - case 'utf16le': - case 'utf-16le': - return ucs2Write(this, string, offset, length) - - default: - if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding) - encoding = ('' + encoding).toLowerCase() - loweredCase = true - } - } -} - -Buffer.prototype.toJSON = function toJSON () { - return { - type: 'Buffer', - data: Array.prototype.slice.call(this._arr || this, 0) - } -} - -function base64Slice (buf, start, end) { - if (start === 0 && end === buf.length) { - return base64.fromByteArray(buf) - } else { - return base64.fromByteArray(buf.slice(start, end)) - } -} - -function utf8Slice (buf, start, end) { - end = Math.min(buf.length, end) - const res = [] - - let i = start - while (i < end) { - const firstByte = buf[i] - let codePoint = null - let bytesPerSequence = (firstByte > 0xEF) - ? 4 - : (firstByte > 0xDF) - ? 3 - : (firstByte > 0xBF) - ? 2 - : 1 - - if (i + bytesPerSequence <= end) { - let secondByte, thirdByte, fourthByte, tempCodePoint - - switch (bytesPerSequence) { - case 1: - if (firstByte < 0x80) { - codePoint = firstByte - } - break - case 2: - secondByte = buf[i + 1] - if ((secondByte & 0xC0) === 0x80) { - tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F) - if (tempCodePoint > 0x7F) { - codePoint = tempCodePoint - } - } - break - case 3: - secondByte = buf[i + 1] - thirdByte = buf[i + 2] - if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) { - tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F) - if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) { - codePoint = tempCodePoint - } - } - break - case 4: - secondByte = buf[i + 1] - thirdByte = buf[i + 2] - fourthByte = buf[i + 3] - if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) { - tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F) - if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) { - codePoint = tempCodePoint - } - } - } - } - - if (codePoint === null) { - // we did not generate a valid codePoint so insert a - // replacement char (U+FFFD) and advance only 1 byte - codePoint = 0xFFFD - bytesPerSequence = 1 - } else if (codePoint > 0xFFFF) { - // encode to utf16 (surrogate pair dance) - codePoint -= 0x10000 - res.push(codePoint >>> 10 & 0x3FF | 0xD800) - codePoint = 0xDC00 | codePoint & 0x3FF - } - - res.push(codePoint) - i += bytesPerSequence - } - - return decodeCodePointsArray(res) -} - -// Based on http://stackoverflow.com/a/22747272/680742, the browser with -// the lowest limit is Chrome, with 0x10000 args. -// We go 1 magnitude less, for safety -const MAX_ARGUMENTS_LENGTH = 0x1000 - -function decodeCodePointsArray (codePoints) { - const len = codePoints.length - if (len <= MAX_ARGUMENTS_LENGTH) { - return String.fromCharCode.apply(String, codePoints) // avoid extra slice() - } - - // Decode in chunks to avoid "call stack size exceeded". - let res = '' - let i = 0 - while (i < len) { - res += String.fromCharCode.apply( - String, - codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH) - ) - } - return res -} - -function asciiSlice (buf, start, end) { - let ret = '' - end = Math.min(buf.length, end) - - for (let i = start; i < end; ++i) { - ret += String.fromCharCode(buf[i] & 0x7F) - } - return ret -} - -function latin1Slice (buf, start, end) { - let ret = '' - end = Math.min(buf.length, end) - - for (let i = start; i < end; ++i) { - ret += String.fromCharCode(buf[i]) - } - return ret -} - -function hexSlice (buf, start, end) { - const len = buf.length - - if (!start || start < 0) start = 0 - if (!end || end < 0 || end > len) end = len - - let out = '' - for (let i = start; i < end; ++i) { - out += hexSliceLookupTable[buf[i]] - } - return out -} - -function utf16leSlice (buf, start, end) { - const bytes = buf.slice(start, end) - let res = '' - // If bytes.length is odd, the last 8 bits must be ignored (same as node.js) - for (let i = 0; i < bytes.length - 1; i += 2) { - res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256)) - } - return res -} - -Buffer.prototype.slice = function slice (start, end) { - const len = this.length - start = ~~start - end = end === undefined ? len : ~~end - - if (start < 0) { - start += len - if (start < 0) start = 0 - } else if (start > len) { - start = len - } - - if (end < 0) { - end += len - if (end < 0) end = 0 - } else if (end > len) { - end = len - } - - if (end < start) end = start - - const newBuf = this.subarray(start, end) - // Return an augmented `Uint8Array` instance - Object.setPrototypeOf(newBuf, Buffer.prototype) - - return newBuf -} - -/* - * Need to make sure that buffer isn't trying to write out of bounds. - */ -function checkOffset (offset, ext, length) { - if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint') - if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length') -} - -Buffer.prototype.readUintLE = - Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) { - offset = offset >>> 0 - byteLength = byteLength >>> 0 - if (!noAssert) checkOffset(offset, byteLength, this.length) - - let val = this[offset] - let mul = 1 - let i = 0 - while (++i < byteLength && (mul *= 0x100)) { - val += this[offset + i] * mul - } - - return val - } - -Buffer.prototype.readUintBE = - Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) { - offset = offset >>> 0 - byteLength = byteLength >>> 0 - if (!noAssert) { - checkOffset(offset, byteLength, this.length) - } - - let val = this[offset + --byteLength] - let mul = 1 - while (byteLength > 0 && (mul *= 0x100)) { - val += this[offset + --byteLength] * mul - } - - return val - } - -Buffer.prototype.readUint8 = - Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 1, this.length) - return this[offset] - } - -Buffer.prototype.readUint16LE = - Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 2, this.length) - return this[offset] | (this[offset + 1] << 8) - } - -Buffer.prototype.readUint16BE = - Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 2, this.length) - return (this[offset] << 8) | this[offset + 1] - } - -Buffer.prototype.readUint32LE = - Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 4, this.length) - - return ((this[offset]) | - (this[offset + 1] << 8) | - (this[offset + 2] << 16)) + - (this[offset + 3] * 0x1000000) - } - -Buffer.prototype.readUint32BE = - Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 4, this.length) - - return (this[offset] * 0x1000000) + - ((this[offset + 1] << 16) | - (this[offset + 2] << 8) | - this[offset + 3]) - } - -Buffer.prototype.readBigUInt64LE = defineBigIntMethod(function readBigUInt64LE (offset) { - offset = offset >>> 0 - validateNumber(offset, 'offset') - const first = this[offset] - const last = this[offset + 7] - if (first === undefined || last === undefined) { - boundsError(offset, this.length - 8) - } - - const lo = first + - this[++offset] * 2 ** 8 + - this[++offset] * 2 ** 16 + - this[++offset] * 2 ** 24 - - const hi = this[++offset] + - this[++offset] * 2 ** 8 + - this[++offset] * 2 ** 16 + - last * 2 ** 24 - - return BigInt(lo) + (BigInt(hi) << BigInt(32)) -}) - -Buffer.prototype.readBigUInt64BE = defineBigIntMethod(function readBigUInt64BE (offset) { - offset = offset >>> 0 - validateNumber(offset, 'offset') - const first = this[offset] - const last = this[offset + 7] - if (first === undefined || last === undefined) { - boundsError(offset, this.length - 8) - } - - const hi = first * 2 ** 24 + - this[++offset] * 2 ** 16 + - this[++offset] * 2 ** 8 + - this[++offset] - - const lo = this[++offset] * 2 ** 24 + - this[++offset] * 2 ** 16 + - this[++offset] * 2 ** 8 + - last - - return (BigInt(hi) << BigInt(32)) + BigInt(lo) -}) - -Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) { - offset = offset >>> 0 - byteLength = byteLength >>> 0 - if (!noAssert) checkOffset(offset, byteLength, this.length) - - let val = this[offset] - let mul = 1 - let i = 0 - while (++i < byteLength && (mul *= 0x100)) { - val += this[offset + i] * mul - } - mul *= 0x80 - - if (val >= mul) val -= Math.pow(2, 8 * byteLength) - - return val -} - -Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) { - offset = offset >>> 0 - byteLength = byteLength >>> 0 - if (!noAssert) checkOffset(offset, byteLength, this.length) - - let i = byteLength - let mul = 1 - let val = this[offset + --i] - while (i > 0 && (mul *= 0x100)) { - val += this[offset + --i] * mul - } - mul *= 0x80 - - if (val >= mul) val -= Math.pow(2, 8 * byteLength) - - return val -} - -Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 1, this.length) - if (!(this[offset] & 0x80)) return (this[offset]) - return ((0xff - this[offset] + 1) * -1) -} - -Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 2, this.length) - const val = this[offset] | (this[offset + 1] << 8) - return (val & 0x8000) ? val | 0xFFFF0000 : val -} - -Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 2, this.length) - const val = this[offset + 1] | (this[offset] << 8) - return (val & 0x8000) ? val | 0xFFFF0000 : val -} - -Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 4, this.length) - - return (this[offset]) | - (this[offset + 1] << 8) | - (this[offset + 2] << 16) | - (this[offset + 3] << 24) -} - -Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 4, this.length) - - return (this[offset] << 24) | - (this[offset + 1] << 16) | - (this[offset + 2] << 8) | - (this[offset + 3]) -} - -Buffer.prototype.readBigInt64LE = defineBigIntMethod(function readBigInt64LE (offset) { - offset = offset >>> 0 - validateNumber(offset, 'offset') - const first = this[offset] - const last = this[offset + 7] - if (first === undefined || last === undefined) { - boundsError(offset, this.length - 8) - } - - const val = this[offset + 4] + - this[offset + 5] * 2 ** 8 + - this[offset + 6] * 2 ** 16 + - (last << 24) // Overflow - - return (BigInt(val) << BigInt(32)) + - BigInt(first + - this[++offset] * 2 ** 8 + - this[++offset] * 2 ** 16 + - this[++offset] * 2 ** 24) -}) - -Buffer.prototype.readBigInt64BE = defineBigIntMethod(function readBigInt64BE (offset) { - offset = offset >>> 0 - validateNumber(offset, 'offset') - const first = this[offset] - const last = this[offset + 7] - if (first === undefined || last === undefined) { - boundsError(offset, this.length - 8) - } - - const val = (first << 24) + // Overflow - this[++offset] * 2 ** 16 + - this[++offset] * 2 ** 8 + - this[++offset] - - return (BigInt(val) << BigInt(32)) + - BigInt(this[++offset] * 2 ** 24 + - this[++offset] * 2 ** 16 + - this[++offset] * 2 ** 8 + - last) -}) - -Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 4, this.length) - return ieee754.read(this, offset, true, 23, 4) -} - -Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 4, this.length) - return ieee754.read(this, offset, false, 23, 4) -} - -Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 8, this.length) - return ieee754.read(this, offset, true, 52, 8) -} - -Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) { - offset = offset >>> 0 - if (!noAssert) checkOffset(offset, 8, this.length) - return ieee754.read(this, offset, false, 52, 8) -} - -function checkInt (buf, value, offset, ext, max, min) { - if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance') - if (value > max || value < min) throw new RangeError('"value" argument is out of bounds') - if (offset + ext > buf.length) throw new RangeError('Index out of range') -} - -Buffer.prototype.writeUintLE = - Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) { - value = +value - offset = offset >>> 0 - byteLength = byteLength >>> 0 - if (!noAssert) { - const maxBytes = Math.pow(2, 8 * byteLength) - 1 - checkInt(this, value, offset, byteLength, maxBytes, 0) - } - - let mul = 1 - let i = 0 - this[offset] = value & 0xFF - while (++i < byteLength && (mul *= 0x100)) { - this[offset + i] = (value / mul) & 0xFF - } - - return offset + byteLength - } - -Buffer.prototype.writeUintBE = - Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) { - value = +value - offset = offset >>> 0 - byteLength = byteLength >>> 0 - if (!noAssert) { - const maxBytes = Math.pow(2, 8 * byteLength) - 1 - checkInt(this, value, offset, byteLength, maxBytes, 0) - } - - let i = byteLength - 1 - let mul = 1 - this[offset + i] = value & 0xFF - while (--i >= 0 && (mul *= 0x100)) { - this[offset + i] = (value / mul) & 0xFF - } - - return offset + byteLength - } - -Buffer.prototype.writeUint8 = - Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0) - this[offset] = (value & 0xff) - return offset + 1 - } - -Buffer.prototype.writeUint16LE = - Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0) - this[offset] = (value & 0xff) - this[offset + 1] = (value >>> 8) - return offset + 2 - } - -Buffer.prototype.writeUint16BE = - Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0) - this[offset] = (value >>> 8) - this[offset + 1] = (value & 0xff) - return offset + 2 - } - -Buffer.prototype.writeUint32LE = - Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0) - this[offset + 3] = (value >>> 24) - this[offset + 2] = (value >>> 16) - this[offset + 1] = (value >>> 8) - this[offset] = (value & 0xff) - return offset + 4 - } - -Buffer.prototype.writeUint32BE = - Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0) - this[offset] = (value >>> 24) - this[offset + 1] = (value >>> 16) - this[offset + 2] = (value >>> 8) - this[offset + 3] = (value & 0xff) - return offset + 4 - } - -function wrtBigUInt64LE (buf, value, offset, min, max) { - checkIntBI(value, min, max, buf, offset, 7) - - let lo = Number(value & BigInt(0xffffffff)) - buf[offset++] = lo - lo = lo >> 8 - buf[offset++] = lo - lo = lo >> 8 - buf[offset++] = lo - lo = lo >> 8 - buf[offset++] = lo - let hi = Number(value >> BigInt(32) & BigInt(0xffffffff)) - buf[offset++] = hi - hi = hi >> 8 - buf[offset++] = hi - hi = hi >> 8 - buf[offset++] = hi - hi = hi >> 8 - buf[offset++] = hi - return offset -} - -function wrtBigUInt64BE (buf, value, offset, min, max) { - checkIntBI(value, min, max, buf, offset, 7) - - let lo = Number(value & BigInt(0xffffffff)) - buf[offset + 7] = lo - lo = lo >> 8 - buf[offset + 6] = lo - lo = lo >> 8 - buf[offset + 5] = lo - lo = lo >> 8 - buf[offset + 4] = lo - let hi = Number(value >> BigInt(32) & BigInt(0xffffffff)) - buf[offset + 3] = hi - hi = hi >> 8 - buf[offset + 2] = hi - hi = hi >> 8 - buf[offset + 1] = hi - hi = hi >> 8 - buf[offset] = hi - return offset + 8 -} - -Buffer.prototype.writeBigUInt64LE = defineBigIntMethod(function writeBigUInt64LE (value, offset = 0) { - return wrtBigUInt64LE(this, value, offset, BigInt(0), BigInt('0xffffffffffffffff')) -}) - -Buffer.prototype.writeBigUInt64BE = defineBigIntMethod(function writeBigUInt64BE (value, offset = 0) { - return wrtBigUInt64BE(this, value, offset, BigInt(0), BigInt('0xffffffffffffffff')) -}) - -Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) { - const limit = Math.pow(2, (8 * byteLength) - 1) - - checkInt(this, value, offset, byteLength, limit - 1, -limit) - } - - let i = 0 - let mul = 1 - let sub = 0 - this[offset] = value & 0xFF - while (++i < byteLength && (mul *= 0x100)) { - if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) { - sub = 1 - } - this[offset + i] = ((value / mul) >> 0) - sub & 0xFF - } - - return offset + byteLength -} - -Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) { - const limit = Math.pow(2, (8 * byteLength) - 1) - - checkInt(this, value, offset, byteLength, limit - 1, -limit) - } - - let i = byteLength - 1 - let mul = 1 - let sub = 0 - this[offset + i] = value & 0xFF - while (--i >= 0 && (mul *= 0x100)) { - if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) { - sub = 1 - } - this[offset + i] = ((value / mul) >> 0) - sub & 0xFF - } - - return offset + byteLength -} - -Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80) - if (value < 0) value = 0xff + value + 1 - this[offset] = (value & 0xff) - return offset + 1 -} - -Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000) - this[offset] = (value & 0xff) - this[offset + 1] = (value >>> 8) - return offset + 2 -} - -Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000) - this[offset] = (value >>> 8) - this[offset + 1] = (value & 0xff) - return offset + 2 -} - -Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000) - this[offset] = (value & 0xff) - this[offset + 1] = (value >>> 8) - this[offset + 2] = (value >>> 16) - this[offset + 3] = (value >>> 24) - return offset + 4 -} - -Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000) - if (value < 0) value = 0xffffffff + value + 1 - this[offset] = (value >>> 24) - this[offset + 1] = (value >>> 16) - this[offset + 2] = (value >>> 8) - this[offset + 3] = (value & 0xff) - return offset + 4 -} - -Buffer.prototype.writeBigInt64LE = defineBigIntMethod(function writeBigInt64LE (value, offset = 0) { - return wrtBigUInt64LE(this, value, offset, -BigInt('0x8000000000000000'), BigInt('0x7fffffffffffffff')) -}) - -Buffer.prototype.writeBigInt64BE = defineBigIntMethod(function writeBigInt64BE (value, offset = 0) { - return wrtBigUInt64BE(this, value, offset, -BigInt('0x8000000000000000'), BigInt('0x7fffffffffffffff')) -}) - -function checkIEEE754 (buf, value, offset, ext, max, min) { - if (offset + ext > buf.length) throw new RangeError('Index out of range') - if (offset < 0) throw new RangeError('Index out of range') -} - -function writeFloat (buf, value, offset, littleEndian, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) { - checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38) - } - ieee754.write(buf, value, offset, littleEndian, 23, 4) - return offset + 4 -} - -Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) { - return writeFloat(this, value, offset, true, noAssert) -} - -Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) { - return writeFloat(this, value, offset, false, noAssert) -} - -function writeDouble (buf, value, offset, littleEndian, noAssert) { - value = +value - offset = offset >>> 0 - if (!noAssert) { - checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308) - } - ieee754.write(buf, value, offset, littleEndian, 52, 8) - return offset + 8 -} - -Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) { - return writeDouble(this, value, offset, true, noAssert) -} - -Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) { - return writeDouble(this, value, offset, false, noAssert) -} - -// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length) -Buffer.prototype.copy = function copy (target, targetStart, start, end) { - if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer') - if (!start) start = 0 - if (!end && end !== 0) end = this.length - if (targetStart >= target.length) targetStart = target.length - if (!targetStart) targetStart = 0 - if (end > 0 && end < start) end = start - - // Copy 0 bytes; we're done - if (end === start) return 0 - if (target.length === 0 || this.length === 0) return 0 - - // Fatal error conditions - if (targetStart < 0) { - throw new RangeError('targetStart out of bounds') - } - if (start < 0 || start >= this.length) throw new RangeError('Index out of range') - if (end < 0) throw new RangeError('sourceEnd out of bounds') - - // Are we oob? - if (end > this.length) end = this.length - if (target.length - targetStart < end - start) { - end = target.length - targetStart + start - } - - const len = end - start - - if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') { - // Use built-in when available, missing from IE11 - this.copyWithin(targetStart, start, end) - } else { - Uint8Array.prototype.set.call( - target, - this.subarray(start, end), - targetStart - ) - } - - return len -} - -// Usage: -// buffer.fill(number[, offset[, end]]) -// buffer.fill(buffer[, offset[, end]]) -// buffer.fill(string[, offset[, end]][, encoding]) -Buffer.prototype.fill = function fill (val, start, end, encoding) { - // Handle string cases: - if (typeof val === 'string') { - if (typeof start === 'string') { - encoding = start - start = 0 - end = this.length - } else if (typeof end === 'string') { - encoding = end - end = this.length - } - if (encoding !== undefined && typeof encoding !== 'string') { - throw new TypeError('encoding must be a string') - } - if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) { - throw new TypeError('Unknown encoding: ' + encoding) - } - if (val.length === 1) { - const code = val.charCodeAt(0) - if ((encoding === 'utf8' && code < 128) || - encoding === 'latin1') { - // Fast path: If `val` fits into a single byte, use that numeric value. - val = code - } - } - } else if (typeof val === 'number') { - val = val & 255 - } else if (typeof val === 'boolean') { - val = Number(val) - } - - // Invalid ranges are not set to a default, so can range check early. - if (start < 0 || this.length < start || this.length < end) { - throw new RangeError('Out of range index') - } - - if (end <= start) { - return this - } - - start = start >>> 0 - end = end === undefined ? this.length : end >>> 0 - - if (!val) val = 0 - - let i - if (typeof val === 'number') { - for (i = start; i < end; ++i) { - this[i] = val - } - } else { - const bytes = Buffer.isBuffer(val) - ? val - : Buffer.from(val, encoding) - const len = bytes.length - if (len === 0) { - throw new TypeError('The value "' + val + - '" is invalid for argument "value"') - } - for (i = 0; i < end - start; ++i) { - this[i + start] = bytes[i % len] - } - } - - return this -} - -// CUSTOM ERRORS -// ============= - -// Simplified versions from Node, changed for Buffer-only usage -const errors = {} -function E (sym, getMessage, Base) { - errors[sym] = class NodeError extends Base { - constructor () { - super() - - Object.defineProperty(this, 'message', { - value: getMessage.apply(this, arguments), - writable: true, - configurable: true - }) - - // Add the error code to the name to include it in the stack trace. - this.name = `${this.name} [${sym}]` - // Access the stack to generate the error message including the error code - // from the name. - this.stack // eslint-disable-line no-unused-expressions - // Reset the name to the actual name. - delete this.name - } - - get code () { - return sym - } - - set code (value) { - Object.defineProperty(this, 'code', { - configurable: true, - enumerable: true, - value, - writable: true - }) - } - - toString () { - return `${this.name} [${sym}]: ${this.message}` - } - } -} - -E('ERR_BUFFER_OUT_OF_BOUNDS', - function (name) { - if (name) { - return `${name} is outside of buffer bounds` - } - - return 'Attempt to access memory outside buffer bounds' - }, RangeError) -E('ERR_INVALID_ARG_TYPE', - function (name, actual) { - return `The "${name}" argument must be of type number. Received type ${typeof actual}` - }, TypeError) -E('ERR_OUT_OF_RANGE', - function (str, range, input) { - let msg = `The value of "${str}" is out of range.` - let received = input - if (Number.isInteger(input) && Math.abs(input) > 2 ** 32) { - received = addNumericalSeparator(String(input)) - } else if (typeof input === 'bigint') { - received = String(input) - if (input > BigInt(2) ** BigInt(32) || input < -(BigInt(2) ** BigInt(32))) { - received = addNumericalSeparator(received) - } - received += 'n' - } - msg += ` It must be ${range}. Received ${received}` - return msg - }, RangeError) - -function addNumericalSeparator (val) { - let res = '' - let i = val.length - const start = val[0] === '-' ? 1 : 0 - for (; i >= start + 4; i -= 3) { - res = `_${val.slice(i - 3, i)}${res}` - } - return `${val.slice(0, i)}${res}` -} - -// CHECK FUNCTIONS -// =============== - -function checkBounds (buf, offset, byteLength) { - validateNumber(offset, 'offset') - if (buf[offset] === undefined || buf[offset + byteLength] === undefined) { - boundsError(offset, buf.length - (byteLength + 1)) - } -} - -function checkIntBI (value, min, max, buf, offset, byteLength) { - if (value > max || value < min) { - const n = typeof min === 'bigint' ? 'n' : '' - let range - if (byteLength > 3) { - if (min === 0 || min === BigInt(0)) { - range = `>= 0${n} and < 2${n} ** ${(byteLength + 1) * 8}${n}` - } else { - range = `>= -(2${n} ** ${(byteLength + 1) * 8 - 1}${n}) and < 2 ** ` + - `${(byteLength + 1) * 8 - 1}${n}` - } - } else { - range = `>= ${min}${n} and <= ${max}${n}` - } - throw new errors.ERR_OUT_OF_RANGE('value', range, value) - } - checkBounds(buf, offset, byteLength) -} - -function validateNumber (value, name) { - if (typeof value !== 'number') { - throw new errors.ERR_INVALID_ARG_TYPE(name, 'number', value) - } -} - -function boundsError (value, length, type) { - if (Math.floor(value) !== value) { - validateNumber(value, type) - throw new errors.ERR_OUT_OF_RANGE(type || 'offset', 'an integer', value) - } - - if (length < 0) { - throw new errors.ERR_BUFFER_OUT_OF_BOUNDS() - } - - throw new errors.ERR_OUT_OF_RANGE(type || 'offset', - `>= ${type ? 1 : 0} and <= ${length}`, - value) -} - -// HELPER FUNCTIONS -// ================ - -const INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g - -function base64clean (str) { - // Node takes equal signs as end of the Base64 encoding - str = str.split('=')[0] - // Node strips out invalid characters like \n and \t from the string, base64-js does not - str = str.trim().replace(INVALID_BASE64_RE, '') - // Node converts strings with length < 2 to '' - if (str.length < 2) return '' - // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not - while (str.length % 4 !== 0) { - str = str + '=' - } - return str -} - -function utf8ToBytes (string, units) { - units = units || Infinity - let codePoint - const length = string.length - let leadSurrogate = null - const bytes = [] - - for (let i = 0; i < length; ++i) { - codePoint = string.charCodeAt(i) - - // is surrogate component - if (codePoint > 0xD7FF && codePoint < 0xE000) { - // last char was a lead - if (!leadSurrogate) { - // no lead yet - if (codePoint > 0xDBFF) { - // unexpected trail - if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD) - continue - } else if (i + 1 === length) { - // unpaired lead - if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD) - continue - } - - // valid lead - leadSurrogate = codePoint - - continue - } - - // 2 leads in a row - if (codePoint < 0xDC00) { - if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD) - leadSurrogate = codePoint - continue - } - - // valid surrogate pair - codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000 - } else if (leadSurrogate) { - // valid bmp char, but last char was a lead - if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD) - } - - leadSurrogate = null - - // encode utf8 - if (codePoint < 0x80) { - if ((units -= 1) < 0) break - bytes.push(codePoint) - } else if (codePoint < 0x800) { - if ((units -= 2) < 0) break - bytes.push( - codePoint >> 0x6 | 0xC0, - codePoint & 0x3F | 0x80 - ) - } else if (codePoint < 0x10000) { - if ((units -= 3) < 0) break - bytes.push( - codePoint >> 0xC | 0xE0, - codePoint >> 0x6 & 0x3F | 0x80, - codePoint & 0x3F | 0x80 - ) - } else if (codePoint < 0x110000) { - if ((units -= 4) < 0) break - bytes.push( - codePoint >> 0x12 | 0xF0, - codePoint >> 0xC & 0x3F | 0x80, - codePoint >> 0x6 & 0x3F | 0x80, - codePoint & 0x3F | 0x80 - ) - } else { - throw new Error('Invalid code point') - } - } - - return bytes -} - -function asciiToBytes (str) { - const byteArray = [] - for (let i = 0; i < str.length; ++i) { - // Node's code seems to be doing this and not & 0x7F.. - byteArray.push(str.charCodeAt(i) & 0xFF) - } - return byteArray -} - -function utf16leToBytes (str, units) { - let c, hi, lo - const byteArray = [] - for (let i = 0; i < str.length; ++i) { - if ((units -= 2) < 0) break - - c = str.charCodeAt(i) - hi = c >> 8 - lo = c % 256 - byteArray.push(lo) - byteArray.push(hi) - } - - return byteArray -} - -function base64ToBytes (str) { - return base64.toByteArray(base64clean(str)) -} - -function blitBuffer (src, dst, offset, length) { - let i - for (i = 0; i < length; ++i) { - if ((i + offset >= dst.length) || (i >= src.length)) break - dst[i + offset] = src[i] - } - return i -} - -// ArrayBuffer or Uint8Array objects from other contexts (i.e. iframes) do not pass -// the `instanceof` check but they should be treated as of that type. -// See: https://github.com/feross/buffer/issues/166 -function isInstance (obj, type) { - return obj instanceof type || - (obj != null && obj.constructor != null && obj.constructor.name != null && - obj.constructor.name === type.name) -} -function numberIsNaN (obj) { - // For IE11 support - return obj !== obj // eslint-disable-line no-self-compare -} - -// Create lookup table for `toString('hex')` -// See: https://github.com/feross/buffer/issues/219 -const hexSliceLookupTable = (function () { - const alphabet = '0123456789abcdef' - const table = new Array(256) - for (let i = 0; i < 16; ++i) { - const i16 = i * 16 - for (let j = 0; j < 16; ++j) { - table[i16 + j] = alphabet[i] + alphabet[j] - } - } - return table -})() - -// Return not function with Error if BigInt not supported -function defineBigIntMethod (fn) { - return typeof BigInt === 'undefined' ? BufferBigIntNotDefined : fn -} - -function BufferBigIntNotDefined () { - throw new Error('BigInt not supported') -} - -globalThis['Buffer'] = Buffer; -globalThis['SlowBuffer'] = SlowBuffer; - -export default { - Buffer, - SlowBuffer, - INSPECT_MAX_BYTES, - kMaxLength: K_MAX_LENGTH, -} diff --git a/elide/runtime/js/polyfills/polyfills.js b/elide/runtime/js/polyfills/polyfills.js index 20fb917..216872b 100644 --- a/elide/runtime/js/polyfills/polyfills.js +++ b/elide/runtime/js/polyfills/polyfills.js @@ -12,6 +12,5 @@ */ import "./abort-controller.js"; -import "./buffer.js"; import "./once.js"; import "./readable-stream.mjs";