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toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};","'use strict';\n\nexports.byteLength = byteLength;\nexports.toByteArray = toByteArray;\nexports.fromByteArray = fromByteArray;\nvar lookup = [];\nvar revLookup = [];\nvar Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array;\nvar code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';\n\nfor (var i = 0, len = code.length; i < len; ++i) {\n  lookup[i] = code[i];\n  revLookup[code.charCodeAt(i)] = i;\n} // Support decoding URL-safe base64 strings, as Node.js does.\n// See: https://en.wikipedia.org/wiki/Base64#URL_applications\n\n\nrevLookup['-'.charCodeAt(0)] = 62;\nrevLookup['_'.charCodeAt(0)] = 63;\n\nfunction getLens(b64) {\n  var len = b64.length;\n\n  if (len % 4 > 0) {\n    throw new Error('Invalid string. Length must be a multiple of 4');\n  } // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n\n\n  var validLen = b64.indexOf('=');\n  if (validLen === -1) validLen = len;\n  var placeHoldersLen = validLen === len ? 0 : 4 - validLen % 4;\n  return [validLen, placeHoldersLen];\n} // base64 is 4/3 + up to two characters of the original data\n\n\nfunction byteLength(b64) {\n  var lens = getLens(b64);\n  var validLen = lens[0];\n  var placeHoldersLen = lens[1];\n  return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;\n}\n\nfunction _byteLength(b64, validLen, placeHoldersLen) {\n  return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;\n}\n\nfunction toByteArray(b64) {\n  var tmp;\n  var lens = getLens(b64);\n  var validLen = lens[0];\n  var placeHoldersLen = lens[1];\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen));\n  var curByte = 0; // if there are placeholders, only get up to the last complete 4 chars\n\n  var len = placeHoldersLen > 0 ? validLen - 4 : validLen;\n  var i;\n\n  for (i = 0; i < len; i += 4) {\n    tmp = revLookup[b64.charCodeAt(i)] << 18 | revLookup[b64.charCodeAt(i + 1)] << 12 | revLookup[b64.charCodeAt(i + 2)] << 6 | revLookup[b64.charCodeAt(i + 3)];\n    arr[curByte++] = tmp >> 16 & 0xFF;\n    arr[curByte++] = tmp >> 8 & 0xFF;\n    arr[curByte++] = tmp & 0xFF;\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp = revLookup[b64.charCodeAt(i)] << 2 | revLookup[b64.charCodeAt(i + 1)] >> 4;\n    arr[curByte++] = tmp & 0xFF;\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp = revLookup[b64.charCodeAt(i)] << 10 | revLookup[b64.charCodeAt(i + 1)] << 4 | revLookup[b64.charCodeAt(i + 2)] >> 2;\n    arr[curByte++] = tmp >> 8 & 0xFF;\n    arr[curByte++] = tmp & 0xFF;\n  }\n\n  return arr;\n}\n\nfunction tripletToBase64(num) {\n  return lookup[num >> 18 & 0x3F] + lookup[num >> 12 & 0x3F] + lookup[num >> 6 & 0x3F] + lookup[num & 0x3F];\n}\n\nfunction encodeChunk(uint8, start, end) {\n  var tmp;\n  var output = [];\n\n  for (var i = start; i < end; i += 3) {\n    tmp = (uint8[i] << 16 & 0xFF0000) + (uint8[i + 1] << 8 & 0xFF00) + (uint8[i + 2] & 0xFF);\n    output.push(tripletToBase64(tmp));\n  }\n\n  return output.join('');\n}\n\nfunction fromByteArray(uint8) {\n  var tmp;\n  var len = uint8.length;\n  var extraBytes = len % 3; // if we have 1 byte left, pad 2 bytes\n\n  var parts = [];\n  var maxChunkLength = 16383; // must be multiple of 3\n  // go through the array every three bytes, we'll deal with trailing stuff later\n\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(uint8, i, i + maxChunkLength > len2 ? len2 : i + maxChunkLength));\n  } // pad the end with zeros, but make sure to not forget the extra bytes\n\n\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1];\n    parts.push(lookup[tmp >> 2] + lookup[tmp << 4 & 0x3F] + '==');\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1];\n    parts.push(lookup[tmp >> 10] + lookup[tmp >> 4 & 0x3F] + lookup[tmp << 2 & 0x3F] + '=');\n  }\n\n  return parts.join('');\n}","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <http://feross.org>\n * @license  MIT\n */\n\n/* eslint-disable no-proto */\n'use strict';\n\nvar base64 = require('base64-js');\n\nvar ieee754 = require('ieee754');\n\nvar isArray = require('isarray');\n\nexports.Buffer = Buffer;\nexports.SlowBuffer = SlowBuffer;\nexports.INSPECT_MAX_BYTES = 50;\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\n\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined ? global.TYPED_ARRAY_SUPPORT : typedArraySupport();\n/*\n * Export kMaxLength after typed array support is determined.\n */\n\nexports.kMaxLength = kMaxLength();\n\nfunction typedArraySupport() {\n  try {\n    var arr = new Uint8Array(1);\n    arr.__proto__ = {\n      __proto__: Uint8Array.prototype,\n      foo: function foo() {\n        return 42;\n      }\n    };\n    return arr.foo() === 42 && // typed array instances can be augmented\n    typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n    arr.subarray(1, 1).byteLength === 0; // ie10 has broken `subarray`\n  } catch (e) {\n    return false;\n  }\n}\n\nfunction kMaxLength() {\n  return Buffer.TYPED_ARRAY_SUPPORT ? 0x7fffffff : 0x3fffffff;\n}\n\nfunction createBuffer(that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length');\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length);\n    that.__proto__ = Buffer.prototype;\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length);\n    }\n\n    that.length = length;\n  }\n\n  return that;\n}\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\n\nfunction Buffer(arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length);\n  } // Common case.\n\n\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error('If encoding is specified then the first argument must be a string');\n    }\n\n    return allocUnsafe(this, arg);\n  }\n\n  return from(this, arg, encodingOrOffset, length);\n}\n\nBuffer.poolSize = 8192; // not used by this implementation\n// TODO: Legacy, not needed anymore. Remove in next major version.\n\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype;\n  return arr;\n};\n\nfunction from(that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number');\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length);\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset);\n  }\n\n  return fromObject(that, value);\n}\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\n\n\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length);\n};\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype;\n  Buffer.__proto__ = Uint8Array;\n\n  if (typeof Symbol !== 'undefined' && Symbol.species && Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    });\n  }\n}\n\nfunction assertSize(size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number');\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative');\n  }\n}\n\nfunction alloc(that, size, fill, encoding) {\n  assertSize(size);\n\n  if (size <= 0) {\n    return createBuffer(that, size);\n  }\n\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string' ? createBuffer(that, size).fill(fill, encoding) : createBuffer(that, size).fill(fill);\n  }\n\n  return createBuffer(that, size);\n}\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\n\n\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding);\n};\n\nfunction allocUnsafe(that, size) {\n  assertSize(size);\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0);\n\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0;\n    }\n  }\n\n  return that;\n}\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\n\n\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size);\n};\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\n\n\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size);\n};\n\nfunction fromString(that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8';\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding');\n  }\n\n  var length = byteLength(string, encoding) | 0;\n  that = createBuffer(that, length);\n  var actual = that.write(string, encoding);\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual);\n  }\n\n  return that;\n}\n\nfunction fromArrayLike(that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0;\n  that = createBuffer(that, length);\n\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255;\n  }\n\n  return that;\n}\n\nfunction fromArrayBuffer(that, array, byteOffset, length) {\n  array.byteLength; // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds');\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds');\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array);\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset);\n  } else {\n    array = new Uint8Array(array, byteOffset, length);\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array;\n    that.__proto__ = Buffer.prototype;\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array);\n  }\n\n  return that;\n}\n\nfunction fromObject(that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0;\n    that = createBuffer(that, len);\n\n    if (that.length === 0) {\n      return that;\n    }\n\n    obj.copy(that, 0, 0, len);\n    return that;\n  }\n\n  if (obj) {\n    if (typeof ArrayBuffer !== 'undefined' && obj.buffer instanceof ArrayBuffer || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0);\n      }\n\n      return fromArrayLike(that, obj);\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data);\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.');\n}\n\nfunction checked(length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' + 'size: 0x' + kMaxLength().toString(16) + ' bytes');\n  }\n\n  return length | 0;\n}\n\nfunction SlowBuffer(length) {\n  if (+length != length) {\n    // eslint-disable-line eqeqeq\n    length = 0;\n  }\n\n  return Buffer.alloc(+length);\n}\n\nBuffer.isBuffer = function isBuffer(b) {\n  return !!(b != null && b._isBuffer);\n};\n\nBuffer.compare = function compare(a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers');\n  }\n\n  if (a === b) return 0;\n  var x = a.length;\n  var y = b.length;\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i];\n      y = b[i];\n      break;\n    }\n  }\n\n  if (x < y) return -1;\n  if (y < x) return 1;\n  return 0;\n};\n\nBuffer.isEncoding = function isEncoding(encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true;\n\n    default:\n      return false;\n  }\n};\n\nBuffer.concat = function concat(list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers');\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0);\n  }\n\n  var i;\n\n  if (length === undefined) {\n    length = 0;\n\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length;\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length);\n  var pos = 0;\n\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i];\n\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers');\n    }\n\n    buf.copy(buffer, pos);\n    pos += buf.length;\n  }\n\n  return buffer;\n};\n\nfunction byteLength(string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length;\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' && (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength;\n  }\n\n  if (typeof string !== 'string') {\n    string = '' + string;\n  }\n\n  var len = string.length;\n  if (len === 0) return 0; // Use a for loop to avoid recursion\n\n  var loweredCase = false;\n\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len;\n\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length;\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2;\n\n      case 'hex':\n        return len >>> 1;\n\n      case 'base64':\n        return base64ToBytes(string).length;\n\n      default:\n        if (loweredCase) return utf8ToBytes(string).length; // assume utf8\n\n        encoding = ('' + encoding).toLowerCase();\n        loweredCase = true;\n    }\n  }\n}\n\nBuffer.byteLength = byteLength;\n\nfunction slowToString(encoding, start, end) {\n  var loweredCase = false; // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n\n  if (start === undefined || start < 0) {\n    start = 0;\n  } // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n\n\n  if (start > this.length) {\n    return '';\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length;\n  }\n\n  if (end <= 0) {\n    return '';\n  } // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n\n\n  end >>>= 0;\n  start >>>= 0;\n\n  if (end <= start) {\n    return '';\n  }\n\n  if (!encoding) encoding = 'utf8';\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end);\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end);\n\n      case 'ascii':\n        return asciiSlice(this, start, end);\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end);\n\n      case 'base64':\n        return base64Slice(this, start, end);\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end);\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding);\n        encoding = (encoding + '').toLowerCase();\n        loweredCase = true;\n    }\n  }\n} // The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\n\n\nBuffer.prototype._isBuffer = true;\n\nfunction swap(b, n, m) {\n  var i = b[n];\n  b[n] = b[m];\n  b[m] = i;\n}\n\nBuffer.prototype.swap16 = function swap16() {\n  var len = this.length;\n\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits');\n  }\n\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1);\n  }\n\n  return this;\n};\n\nBuffer.prototype.swap32 = function swap32() {\n  var len = this.length;\n\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits');\n  }\n\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3);\n    swap(this, i + 1, i + 2);\n  }\n\n  return this;\n};\n\nBuffer.prototype.swap64 = function swap64() {\n  var len = this.length;\n\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits');\n  }\n\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7);\n    swap(this, i + 1, i + 6);\n    swap(this, i + 2, i + 5);\n    swap(this, i + 3, i + 4);\n  }\n\n  return this;\n};\n\nBuffer.prototype.toString = function toString() {\n  var length = this.length | 0;\n  if (length === 0) return '';\n  if (arguments.length === 0) return utf8Slice(this, 0, length);\n  return slowToString.apply(this, arguments);\n};\n\nBuffer.prototype.equals = function equals(b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer');\n  if (this === b) return true;\n  return Buffer.compare(this, b) === 0;\n};\n\nBuffer.prototype.inspect = function inspect() {\n  var str = '';\n  var max = exports.INSPECT_MAX_BYTES;\n\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ');\n    if (this.length > max) str += ' ... ';\n  }\n\n  return '<Buffer ' + str + '>';\n};\n\nBuffer.prototype.compare = function compare(target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer');\n  }\n\n  if (start === undefined) {\n    start = 0;\n  }\n\n  if (end === undefined) {\n    end = target ? target.length : 0;\n  }\n\n  if (thisStart === undefined) {\n    thisStart = 0;\n  }\n\n  if (thisEnd === undefined) {\n    thisEnd = this.length;\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index');\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0;\n  }\n\n  if (thisStart >= thisEnd) {\n    return -1;\n  }\n\n  if (start >= end) {\n    return 1;\n  }\n\n  start >>>= 0;\n  end >>>= 0;\n  thisStart >>>= 0;\n  thisEnd >>>= 0;\n  if (this === target) return 0;\n  var x = thisEnd - thisStart;\n  var y = end - start;\n  var len = Math.min(x, y);\n  var thisCopy = this.slice(thisStart, thisEnd);\n  var targetCopy = target.slice(start, end);\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i];\n      y = targetCopy[i];\n      break;\n    }\n  }\n\n  if (x < y) return -1;\n  if (y < x) return 1;\n  return 0;\n}; // Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\n\n\nfunction bidirectionalIndexOf(buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1; // Normalize byteOffset\n\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset;\n    byteOffset = 0;\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff;\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000;\n  }\n\n  byteOffset = +byteOffset; // Coerce to Number.\n\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : buffer.length - 1;\n  } // Normalize byteOffset: negative offsets start from the end of the buffer\n\n\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset;\n\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1;else byteOffset = buffer.length - 1;\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0;else return -1;\n  } // Normalize val\n\n\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding);\n  } // Finally, search either indexOf (if dir is true) or lastIndexOf\n\n\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1;\n    }\n\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir);\n  } else if (typeof val === 'number') {\n    val = val & 0xFF; // Search for a byte value [0-255]\n\n    if (Buffer.TYPED_ARRAY_SUPPORT && typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset);\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset);\n      }\n    }\n\n    return arrayIndexOf(buffer, [val], byteOffset, encoding, dir);\n  }\n\n  throw new TypeError('val must be string, number or Buffer');\n}\n\nfunction arrayIndexOf(arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1;\n  var arrLength = arr.length;\n  var valLength = val.length;\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase();\n\n    if (encoding === 'ucs2' || encoding === 'ucs-2' || encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1;\n      }\n\n      indexSize = 2;\n      arrLength /= 2;\n      valLength /= 2;\n      byteOffset /= 2;\n    }\n  }\n\n  function read(buf, i) {\n    if (indexSize === 1) {\n      return buf[i];\n    } else {\n      return buf.readUInt16BE(i * indexSize);\n    }\n  }\n\n  var i;\n\n  if (dir) {\n    var foundIndex = -1;\n\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i;\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize;\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex;\n        foundIndex = -1;\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength;\n\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true;\n\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false;\n          break;\n        }\n      }\n\n      if (found) return i;\n    }\n  }\n\n  return -1;\n}\n\nBuffer.prototype.includes = function includes(val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1;\n};\n\nBuffer.prototype.indexOf = function indexOf(val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true);\n};\n\nBuffer.prototype.lastIndexOf = function lastIndexOf(val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false);\n};\n\nfunction hexWrite(buf, string, offset, length) {\n  offset = Number(offset) || 0;\n  var remaining = buf.length - offset;\n\n  if (!length) {\n    length = remaining;\n  } else {\n    length = Number(length);\n\n    if (length > remaining) {\n      length = remaining;\n    }\n  } // must be an even number of digits\n\n\n  var strLen = string.length;\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string');\n\n  if (length > strLen / 2) {\n    length = strLen / 2;\n  }\n\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16);\n    if (isNaN(parsed)) return i;\n    buf[offset + i] = parsed;\n  }\n\n  return i;\n}\n\nfunction utf8Write(buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length);\n}\n\nfunction asciiWrite(buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length);\n}\n\nfunction latin1Write(buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length);\n}\n\nfunction base64Write(buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length);\n}\n\nfunction ucs2Write(buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length);\n}\n\nBuffer.prototype.write = function write(string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8';\n    length = this.length;\n    offset = 0; // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset;\n    length = this.length;\n    offset = 0; // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0;\n\n    if (isFinite(length)) {\n      length = length | 0;\n      if (encoding === undefined) encoding = 'utf8';\n    } else {\n      encoding = length;\n      length = undefined;\n    } // legacy write(string, encoding, offset, length) - remove in v0.13\n\n  } else {\n    throw new Error('Buffer.write(string, encoding, offset[, length]) is no longer supported');\n  }\n\n  var remaining = this.length - offset;\n  if (length === undefined || length > remaining) length = remaining;\n\n  if (string.length > 0 && (length < 0 || offset < 0) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds');\n  }\n\n  if (!encoding) encoding = 'utf8';\n  var loweredCase = false;\n\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length);\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length);\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length);\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length);\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length);\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length);\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding);\n        encoding = ('' + encoding).toLowerCase();\n        loweredCase = true;\n    }\n  }\n};\n\nBuffer.prototype.toJSON = function toJSON() {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  };\n};\n\nfunction base64Slice(buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf);\n  } else {\n    return base64.fromByteArray(buf.slice(start, end));\n  }\n}\n\nfunction utf8Slice(buf, start, end) {\n  end = Math.min(buf.length, end);\n  var res = [];\n  var i = start;\n\n  while (i < end) {\n    var firstByte = buf[i];\n    var codePoint = null;\n    var bytesPerSequence = firstByte > 0xEF ? 4 : firstByte > 0xDF ? 3 : firstByte > 0xBF ? 2 : 1;\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint;\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte;\n          }\n\n          break;\n\n        case 2:\n          secondByte = buf[i + 1];\n\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | secondByte & 0x3F;\n\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint;\n            }\n          }\n\n          break;\n\n        case 3:\n          secondByte = buf[i + 1];\n          thirdByte = buf[i + 2];\n\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | thirdByte & 0x3F;\n\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint;\n            }\n          }\n\n          break;\n\n        case 4:\n          secondByte = buf[i + 1];\n          thirdByte = buf[i + 2];\n          fourthByte = buf[i + 3];\n\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | fourthByte & 0x3F;\n\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint;\n            }\n          }\n\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD;\n      bytesPerSequence = 1;\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000;\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800);\n      codePoint = 0xDC00 | codePoint & 0x3FF;\n    }\n\n    res.push(codePoint);\n    i += bytesPerSequence;\n  }\n\n  return decodeCodePointsArray(res);\n} // Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\n\n\nvar MAX_ARGUMENTS_LENGTH = 0x1000;\n\nfunction decodeCodePointsArray(codePoints) {\n  var len = codePoints.length;\n\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints); // avoid extra slice()\n  } // Decode in chunks to avoid \"call stack size exceeded\".\n\n\n  var res = '';\n  var i = 0;\n\n  while (i < len) {\n    res += String.fromCharCode.apply(String, codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH));\n  }\n\n  return res;\n}\n\nfunction asciiSlice(buf, start, end) {\n  var ret = '';\n  end = Math.min(buf.length, end);\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F);\n  }\n\n  return ret;\n}\n\nfunction latin1Slice(buf, start, end) {\n  var ret = '';\n  end = Math.min(buf.length, end);\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i]);\n  }\n\n  return ret;\n}\n\nfunction hexSlice(buf, start, end) {\n  var len = buf.length;\n  if (!start || start < 0) start = 0;\n  if (!end || end < 0 || end > len) end = len;\n  var out = '';\n\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i]);\n  }\n\n  return out;\n}\n\nfunction utf16leSlice(buf, start, end) {\n  var bytes = buf.slice(start, end);\n  var res = '';\n\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256);\n  }\n\n  return res;\n}\n\nBuffer.prototype.slice = function slice(start, end) {\n  var len = this.length;\n  start = ~~start;\n  end = end === undefined ? len : ~~end;\n\n  if (start < 0) {\n    start += len;\n    if (start < 0) start = 0;\n  } else if (start > len) {\n    start = len;\n  }\n\n  if (end < 0) {\n    end += len;\n    if (end < 0) end = 0;\n  } else if (end > len) {\n    end = len;\n  }\n\n  if (end < start) end = start;\n  var newBuf;\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end);\n    newBuf.__proto__ = Buffer.prototype;\n  } else {\n    var sliceLen = end - start;\n    newBuf = new Buffer(sliceLen, undefined);\n\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start];\n    }\n  }\n\n  return newBuf;\n};\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\n\n\nfunction checkOffset(offset, ext, length) {\n  if (offset % 1 !== 0 || offset < 0) throw new RangeError('offset is not uint');\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length');\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE(offset, byteLength, noAssert) {\n  offset = offset | 0;\n  byteLength = byteLength | 0;\n  if (!noAssert) checkOffset(offset, byteLength, this.length);\n  var val = this[offset];\n  var mul = 1;\n  var i = 0;\n\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul;\n  }\n\n  return val;\n};\n\nBuffer.prototype.readUIntBE = function readUIntBE(offset, byteLength, noAssert) {\n  offset = offset | 0;\n  byteLength = byteLength | 0;\n\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length);\n  }\n\n  var val = this[offset + --byteLength];\n  var mul = 1;\n\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul;\n  }\n\n  return val;\n};\n\nBuffer.prototype.readUInt8 = function readUInt8(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length);\n  return this[offset];\n};\n\nBuffer.prototype.readUInt16LE = function readUInt16LE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length);\n  return this[offset] | this[offset + 1] << 8;\n};\n\nBuffer.prototype.readUInt16BE = function readUInt16BE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length);\n  return this[offset] << 8 | this[offset + 1];\n};\n\nBuffer.prototype.readUInt32LE = function readUInt32LE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length);\n  return (this[offset] | this[offset + 1] << 8 | this[offset + 2] << 16) + this[offset + 3] * 0x1000000;\n};\n\nBuffer.prototype.readUInt32BE = function readUInt32BE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length);\n  return this[offset] * 0x1000000 + (this[offset + 1] << 16 | this[offset + 2] << 8 | this[offset + 3]);\n};\n\nBuffer.prototype.readIntLE = function readIntLE(offset, byteLength, noAssert) {\n  offset = offset | 0;\n  byteLength = byteLength | 0;\n  if (!noAssert) checkOffset(offset, byteLength, this.length);\n  var val = this[offset];\n  var mul = 1;\n  var i = 0;\n\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul;\n  }\n\n  mul *= 0x80;\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength);\n  return val;\n};\n\nBuffer.prototype.readIntBE = function readIntBE(offset, byteLength, noAssert) {\n  offset = offset | 0;\n  byteLength = byteLength | 0;\n  if (!noAssert) checkOffset(offset, byteLength, this.length);\n  var i = byteLength;\n  var mul = 1;\n  var val = this[offset + --i];\n\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul;\n  }\n\n  mul *= 0x80;\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength);\n  return val;\n};\n\nBuffer.prototype.readInt8 = function readInt8(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length);\n  if (!(this[offset] & 0x80)) return this[offset];\n  return (0xff - this[offset] + 1) * -1;\n};\n\nBuffer.prototype.readInt16LE = function readInt16LE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length);\n  var val = this[offset] | this[offset + 1] << 8;\n  return val & 0x8000 ? val | 0xFFFF0000 : val;\n};\n\nBuffer.prototype.readInt16BE = function readInt16BE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length);\n  var val = this[offset + 1] | this[offset] << 8;\n  return val & 0x8000 ? val | 0xFFFF0000 : val;\n};\n\nBuffer.prototype.readInt32LE = function readInt32LE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length);\n  return this[offset] | this[offset + 1] << 8 | this[offset + 2] << 16 | this[offset + 3] << 24;\n};\n\nBuffer.prototype.readInt32BE = function readInt32BE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length);\n  return this[offset] << 24 | this[offset + 1] << 16 | this[offset + 2] << 8 | this[offset + 3];\n};\n\nBuffer.prototype.readFloatLE = function readFloatLE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length);\n  return ieee754.read(this, offset, true, 23, 4);\n};\n\nBuffer.prototype.readFloatBE = function readFloatBE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length);\n  return ieee754.read(this, offset, false, 23, 4);\n};\n\nBuffer.prototype.readDoubleLE = function readDoubleLE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length);\n  return ieee754.read(this, offset, true, 52, 8);\n};\n\nBuffer.prototype.readDoubleBE = function readDoubleBE(offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length);\n  return ieee754.read(this, offset, false, 52, 8);\n};\n\nfunction checkInt(buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance');\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds');\n  if (offset + ext > buf.length) throw new RangeError('Index out of range');\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE(value, offset, byteLength, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  byteLength = byteLength | 0;\n\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1;\n    checkInt(this, value, offset, byteLength, maxBytes, 0);\n  }\n\n  var mul = 1;\n  var i = 0;\n  this[offset] = value & 0xFF;\n\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = value / mul & 0xFF;\n  }\n\n  return offset + byteLength;\n};\n\nBuffer.prototype.writeUIntBE = function writeUIntBE(value, offset, byteLength, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  byteLength = byteLength | 0;\n\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1;\n    checkInt(this, value, offset, byteLength, maxBytes, 0);\n  }\n\n  var i = byteLength - 1;\n  var mul = 1;\n  this[offset + i] = value & 0xFF;\n\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = value / mul & 0xFF;\n  }\n\n  return offset + byteLength;\n};\n\nBuffer.prototype.writeUInt8 = function writeUInt8(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0);\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value);\n  this[offset] = value & 0xff;\n  return offset + 1;\n};\n\nfunction objectWriteUInt16(buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1;\n\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & 0xff << 8 * (littleEndian ? i : 1 - i)) >>> (littleEndian ? i : 1 - i) * 8;\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value & 0xff;\n    this[offset + 1] = value >>> 8;\n  } else {\n    objectWriteUInt16(this, value, offset, true);\n  }\n\n  return offset + 2;\n};\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value >>> 8;\n    this[offset + 1] = value & 0xff;\n  } else {\n    objectWriteUInt16(this, value, offset, false);\n  }\n\n  return offset + 2;\n};\n\nfunction objectWriteUInt32(buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1;\n\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = value >>> (littleEndian ? i : 3 - i) * 8 & 0xff;\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = value >>> 24;\n    this[offset + 2] = value >>> 16;\n    this[offset + 1] = value >>> 8;\n    this[offset] = value & 0xff;\n  } else {\n    objectWriteUInt32(this, value, offset, true);\n  }\n\n  return offset + 4;\n};\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value >>> 24;\n    this[offset + 1] = value >>> 16;\n    this[offset + 2] = value >>> 8;\n    this[offset + 3] = value & 0xff;\n  } else {\n    objectWriteUInt32(this, value, offset, false);\n  }\n\n  return offset + 4;\n};\n\nBuffer.prototype.writeIntLE = function writeIntLE(value, offset, byteLength, noAssert) {\n  value = +value;\n  offset = offset | 0;\n\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1);\n    checkInt(this, value, offset, byteLength, limit - 1, -limit);\n  }\n\n  var i = 0;\n  var mul = 1;\n  var sub = 0;\n  this[offset] = value & 0xFF;\n\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1;\n    }\n\n    this[offset + i] = (value / mul >> 0) - sub & 0xFF;\n  }\n\n  return offset + byteLength;\n};\n\nBuffer.prototype.writeIntBE = function writeIntBE(value, offset, byteLength, noAssert) {\n  value = +value;\n  offset = offset | 0;\n\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1);\n    checkInt(this, value, offset, byteLength, limit - 1, -limit);\n  }\n\n  var i = byteLength - 1;\n  var mul = 1;\n  var sub = 0;\n  this[offset + i] = value & 0xFF;\n\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1;\n    }\n\n    this[offset + i] = (value / mul >> 0) - sub & 0xFF;\n  }\n\n  return offset + byteLength;\n};\n\nBuffer.prototype.writeInt8 = function writeInt8(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80);\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value);\n  if (value < 0) value = 0xff + value + 1;\n  this[offset] = value & 0xff;\n  return offset + 1;\n};\n\nBuffer.prototype.writeInt16LE = function writeInt16LE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value & 0xff;\n    this[offset + 1] = value >>> 8;\n  } else {\n    objectWriteUInt16(this, value, offset, true);\n  }\n\n  return offset + 2;\n};\n\nBuffer.prototype.writeInt16BE = function writeInt16BE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value >>> 8;\n    this[offset + 1] = value & 0xff;\n  } else {\n    objectWriteUInt16(this, value, offset, false);\n  }\n\n  return offset + 2;\n};\n\nBuffer.prototype.writeInt32LE = function writeInt32LE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000);\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value & 0xff;\n    this[offset + 1] = value >>> 8;\n    this[offset + 2] = value >>> 16;\n    this[offset + 3] = value >>> 24;\n  } else {\n    objectWriteUInt32(this, value, offset, true);\n  }\n\n  return offset + 4;\n};\n\nBuffer.prototype.writeInt32BE = function writeInt32BE(value, offset, noAssert) {\n  value = +value;\n  offset = offset | 0;\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000);\n  if (value < 0) value = 0xffffffff + value + 1;\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = value >>> 24;\n    this[offset + 1] = value >>> 16;\n    this[offset + 2] = value >>> 8;\n    this[offset + 3] = value & 0xff;\n  } else {\n    objectWriteUInt32(this, value, offset, false);\n  }\n\n  return offset + 4;\n};\n\nfunction checkIEEE754(buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range');\n  if (offset < 0) throw new RangeError('Index out of range');\n}\n\nfunction writeFloat(buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38);\n  }\n\n  ieee754.write(buf, value, offset, littleEndian, 23, 4);\n  return offset + 4;\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE(value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert);\n};\n\nBuffer.prototype.writeFloatBE = function writeFloatBE(value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert);\n};\n\nfunction writeDouble(buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308);\n  }\n\n  ieee754.write(buf, value, offset, littleEndian, 52, 8);\n  return offset + 8;\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE(value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert);\n};\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE(value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert);\n}; // copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\n\n\nBuffer.prototype.copy = function copy(target, targetStart, start, end) {\n  if (!start) start = 0;\n  if (!end && end !== 0) end = this.length;\n  if (targetStart >= target.length) targetStart = target.length;\n  if (!targetStart) targetStart = 0;\n  if (end > 0 && end < start) end = start; // Copy 0 bytes; we're done\n\n  if (end === start) return 0;\n  if (target.length === 0 || this.length === 0) return 0; // Fatal error conditions\n\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds');\n  }\n\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds');\n  if (end < 0) throw new RangeError('sourceEnd out of bounds'); // Are we oob?\n\n  if (end > this.length) end = this.length;\n\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start;\n  }\n\n  var len = end - start;\n  var i;\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start];\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start];\n    }\n  } else {\n    Uint8Array.prototype.set.call(target, this.subarray(start, start + len), targetStart);\n  }\n\n  return len;\n}; // Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\n\n\nBuffer.prototype.fill = function fill(val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start;\n      start = 0;\n      end = this.length;\n    } else if (typeof end === 'string') {\n      encoding = end;\n      end = this.length;\n    }\n\n    if (val.length === 1) {\n      var code = val.charCodeAt(0);\n\n      if (code < 256) {\n        val = code;\n      }\n    }\n\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string');\n    }\n\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding);\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255;\n  } // Invalid ranges are not set to a default, so can range check early.\n\n\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index');\n  }\n\n  if (end <= start) {\n    return this;\n  }\n\n  start = start >>> 0;\n  end = end === undefined ? this.length : end >>> 0;\n  if (!val) val = 0;\n  var i;\n\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val;\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val) ? val : utf8ToBytes(new Buffer(val, encoding).toString());\n    var len = bytes.length;\n\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len];\n    }\n  }\n\n  return this;\n}; // HELPER FUNCTIONS\n// ================\n\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g;\n\nfunction base64clean(str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, ''); // Node converts strings with length < 2 to ''\n\n  if (str.length < 2) return ''; // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n\n  while (str.length % 4 !== 0) {\n    str = str + '=';\n  }\n\n  return str;\n}\n\nfunction stringtrim(str) {\n  if (str.trim) return str.trim();\n  return str.replace(/^\\s+|\\s+$/g, '');\n}\n\nfunction toHex(n) {\n  if (n < 16) return '0' + n.toString(16);\n  return n.toString(16);\n}\n\nfunction utf8ToBytes(string, units) {\n  units = units || Infinity;\n  var codePoint;\n  var length = string.length;\n  var leadSurrogate = null;\n  var bytes = [];\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i); // is surrogate component\n\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);\n          continue;\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);\n          continue;\n        } // valid lead\n\n\n        leadSurrogate = codePoint;\n        continue;\n      } // 2 leads in a row\n\n\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);\n        leadSurrogate = codePoint;\n        continue;\n      } // valid surrogate pair\n\n\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000;\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);\n    }\n\n    leadSurrogate = null; // encode utf8\n\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break;\n      bytes.push(codePoint);\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break;\n      bytes.push(codePoint >> 0x6 | 0xC0, codePoint & 0x3F | 0x80);\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break;\n      bytes.push(codePoint >> 0xC | 0xE0, codePoint >> 0x6 & 0x3F | 0x80, codePoint & 0x3F | 0x80);\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break;\n      bytes.push(codePoint >> 0x12 | 0xF0, codePoint >> 0xC & 0x3F | 0x80, codePoint >> 0x6 & 0x3F | 0x80, codePoint & 0x3F | 0x80);\n    } else {\n      throw new Error('Invalid code point');\n    }\n  }\n\n  return bytes;\n}\n\nfunction asciiToBytes(str) {\n  var byteArray = [];\n\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF);\n  }\n\n  return byteArray;\n}\n\nfunction utf16leToBytes(str, units) {\n  var c, hi, lo;\n  var byteArray = [];\n\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break;\n    c = str.charCodeAt(i);\n    hi = c >> 8;\n    lo = c % 256;\n    byteArray.push(lo);\n    byteArray.push(hi);\n  }\n\n  return byteArray;\n}\n\nfunction base64ToBytes(str) {\n  return base64.toByteArray(base64clean(str));\n}\n\nfunction blitBuffer(src, dst, offset, length) {\n  for (var i = 0; i < length; ++i) {\n    if (i + offset >= dst.length || i >= src.length) break;\n    dst[i + offset] = src[i];\n  }\n\n  return i;\n}\n\nfunction isnan(val) {\n  return val !== val; // eslint-disable-line no-self-compare\n}","if (typeof Object.create === 'function') {\n  // implementation from standard node.js 'util' module\n  module.exports = function inherits(ctor, superCtor) {\n    if (superCtor) {\n      ctor.super_ = superCtor;\n      ctor.prototype = Object.create(superCtor.prototype, {\n        constructor: {\n          value: ctor,\n          enumerable: false,\n          writable: true,\n          configurable: true\n        }\n      });\n    }\n  };\n} else {\n  // old school shim for old browsers\n  module.exports = function inherits(ctor, superCtor) {\n    if (superCtor) {\n      ctor.super_ = superCtor;\n\n      var TempCtor = function TempCtor() {};\n\n      TempCtor.prototype = superCtor.prototype;\n      ctor.prototype = new TempCtor();\n      ctor.prototype.constructor = ctor;\n    }\n  };\n}","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n'use strict';\n\nvar R = typeof Reflect === 'object' ? Reflect : null;\nvar ReflectApply = R && typeof R.apply === 'function' ? R.apply : function ReflectApply(target, receiver, args) {\n  return Function.prototype.apply.call(target, receiver, args);\n};\nvar ReflectOwnKeys;\n\nif (R && typeof R.ownKeys === 'function') {\n  ReflectOwnKeys = R.ownKeys;\n} else if (Object.getOwnPropertySymbols) {\n  ReflectOwnKeys = function ReflectOwnKeys(target) {\n    return Object.getOwnPropertyNames(target).concat(Object.getOwnPropertySymbols(target));\n  };\n} else {\n  ReflectOwnKeys = function ReflectOwnKeys(target) {\n    return Object.getOwnPropertyNames(target);\n  };\n}\n\nfunction ProcessEmitWarning(warning) {\n  if (console && console.warn) console.warn(warning);\n}\n\nvar NumberIsNaN = Number.isNaN || function NumberIsNaN(value) {\n  return value !== value;\n};\n\nfunction EventEmitter() {\n  EventEmitter.init.call(this);\n}\n\nmodule.exports = EventEmitter;\nmodule.exports.once = once; // Backwards-compat with node 0.10.x\n\nEventEmitter.EventEmitter = EventEmitter;\nEventEmitter.prototype._events = undefined;\nEventEmitter.prototype._eventsCount = 0;\nEventEmitter.prototype._maxListeners = undefined; // By default EventEmitters will print a warning if more than 10 listeners are\n// added to it. This is a useful default which helps finding memory leaks.\n\nvar defaultMaxListeners = 10;\n\nfunction checkListener(listener) {\n  if (typeof listener !== 'function') {\n    throw new TypeError('The \"listener\" argument must be of type Function. Received type ' + typeof listener);\n  }\n}\n\nObject.defineProperty(EventEmitter, 'defaultMaxListeners', {\n  enumerable: true,\n  get: function get() {\n    return defaultMaxListeners;\n  },\n  set: function set(arg) {\n    if (typeof arg !== 'number' || arg < 0 || NumberIsNaN(arg)) {\n      throw new RangeError('The value of \"defaultMaxListeners\" is out of range. It must be a non-negative number. Received ' + arg + '.');\n    }\n\n    defaultMaxListeners = arg;\n  }\n});\n\nEventEmitter.init = function () {\n  if (this._events === undefined || this._events === Object.getPrototypeOf(this)._events) {\n    this._events = Object.create(null);\n    this._eventsCount = 0;\n  }\n\n  this._maxListeners = this._maxListeners || undefined;\n}; // Obviously not all Emitters should be limited to 10. This function allows\n// that to be increased. Set to zero for unlimited.\n\n\nEventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {\n  if (typeof n !== 'number' || n < 0 || NumberIsNaN(n)) {\n    throw new RangeError('The value of \"n\" is out of range. It must be a non-negative number. Received ' + n + '.');\n  }\n\n  this._maxListeners = n;\n  return this;\n};\n\nfunction _getMaxListeners(that) {\n  if (that._maxListeners === undefined) return EventEmitter.defaultMaxListeners;\n  return that._maxListeners;\n}\n\nEventEmitter.prototype.getMaxListeners = function getMaxListeners() {\n  return _getMaxListeners(this);\n};\n\nEventEmitter.prototype.emit = function emit(type) {\n  var args = [];\n\n  for (var i = 1; i < arguments.length; i++) {\n    args.push(arguments[i]);\n  }\n\n  var doError = type === 'error';\n  var events = this._events;\n  if (events !== undefined) doError = doError && events.error === undefined;else if (!doError) return false; // If there is no 'error' event listener then throw.\n\n  if (doError) {\n    var er;\n    if (args.length > 0) er = args[0];\n\n    if (er instanceof Error) {\n      // Note: The comments on the `throw` lines are intentional, they show\n      // up in Node's output if this results in an unhandled exception.\n      throw er; // Unhandled 'error' event\n    } // At least give some kind of context to the user\n\n\n    var err = new Error('Unhandled error.' + (er ? ' (' + er.message + ')' : ''));\n    err.context = er;\n    throw err; // Unhandled 'error' event\n  }\n\n  var handler = events[type];\n  if (handler === undefined) return false;\n\n  if (typeof handler === 'function') {\n    ReflectApply(handler, this, args);\n  } else {\n    var len = handler.length;\n    var listeners = arrayClone(handler, len);\n\n    for (var i = 0; i < len; ++i) {\n      ReflectApply(listeners[i], this, args);\n    }\n  }\n\n  return true;\n};\n\nfunction _addListener(target, type, listener, prepend) {\n  var m;\n  var events;\n  var existing;\n  checkListener(listener);\n  events = target._events;\n\n  if (events === undefined) {\n    events = target._events = Object.create(null);\n    target._eventsCount = 0;\n  } else {\n    // To avoid recursion in the case that type === \"newListener\"! Before\n    // adding it to the listeners, first emit \"newListener\".\n    if (events.newListener !== undefined) {\n      target.emit('newListener', type, listener.listener ? listener.listener : listener); // Re-assign `events` because a newListener handler could have caused the\n      // this._events to be assigned to a new object\n\n      events = target._events;\n    }\n\n    existing = events[type];\n  }\n\n  if (existing === undefined) {\n    // Optimize the case of one listener. Don't need the extra array object.\n    existing = events[type] = listener;\n    ++target._eventsCount;\n  } else {\n    if (typeof existing === 'function') {\n      // Adding the second element, need to change to array.\n      existing = events[type] = prepend ? [listener, existing] : [existing, listener]; // If we've already got an array, just append.\n    } else if (prepend) {\n      existing.unshift(listener);\n    } else {\n      existing.push(listener);\n    } // Check for listener leak\n\n\n    m = _getMaxListeners(target);\n\n    if (m > 0 && existing.length > m && !existing.warned) {\n      existing.warned = true; // No error code for this since it is a Warning\n      // eslint-disable-next-line no-restricted-syntax\n\n      var w = new Error('Possible EventEmitter memory leak detected. ' + existing.length + ' ' + String(type) + ' listeners ' + 'added. Use emitter.setMaxListeners() to ' + 'increase limit');\n      w.name = 'MaxListenersExceededWarning';\n      w.emitter = target;\n      w.type = type;\n      w.count = existing.length;\n      ProcessEmitWarning(w);\n    }\n  }\n\n  return target;\n}\n\nEventEmitter.prototype.addListener = function addListener(type, listener) {\n  return _addListener(this, type, listener, false);\n};\n\nEventEmitter.prototype.on = EventEmitter.prototype.addListener;\n\nEventEmitter.prototype.prependListener = function prependListener(type, listener) {\n  return _addListener(this, type, listener, true);\n};\n\nfunction onceWrapper() {\n  if (!this.fired) {\n    this.target.removeListener(this.type, this.wrapFn);\n    this.fired = true;\n    if (arguments.length === 0) return this.listener.call(this.target);\n    return this.listener.apply(this.target, arguments);\n  }\n}\n\nfunction _onceWrap(target, type, listener) {\n  var state = {\n    fired: false,\n    wrapFn: undefined,\n    target: target,\n    type: type,\n    listener: listener\n  };\n  var wrapped = onceWrapper.bind(state);\n  wrapped.listener = listener;\n  state.wrapFn = wrapped;\n  return wrapped;\n}\n\nEventEmitter.prototype.once = function once(type, listener) {\n  checkListener(listener);\n  this.on(type, _onceWrap(this, type, listener));\n  return this;\n};\n\nEventEmitter.prototype.prependOnceListener = function prependOnceListener(type, listener) {\n  checkListener(listener);\n  this.prependListener(type, _onceWrap(this, type, listener));\n  return this;\n}; // Emits a 'removeListener' event if and only if the listener was removed.\n\n\nEventEmitter.prototype.removeListener = function removeListener(type, listener) {\n  var list, events, position, i, originalListener;\n  checkListener(listener);\n  events = this._events;\n  if (events === undefined) return this;\n  list = events[type];\n  if (list === undefined) return this;\n\n  if (list === listener || list.listener === listener) {\n    if (--this._eventsCount === 0) this._events = Object.create(null);else {\n      delete events[type];\n      if (events.removeListener) this.emit('removeListener', type, list.listener || listener);\n    }\n  } else if (typeof list !== 'function') {\n    position = -1;\n\n    for (i = list.length - 1; i >= 0; i--) {\n      if (list[i] === listener || list[i].listener === listener) {\n        originalListener = list[i].listener;\n        position = i;\n        break;\n      }\n    }\n\n    if (position < 0) return this;\n    if (position === 0) list.shift();else {\n      spliceOne(list, position);\n    }\n    if (list.length === 1) events[type] = list[0];\n    if (events.removeListener !== undefined) this.emit('removeListener', type, originalListener || listener);\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.off = EventEmitter.prototype.removeListener;\n\nEventEmitter.prototype.removeAllListeners = function removeAllListeners(type) {\n  var listeners, events, i;\n  events = this._events;\n  if (events === undefined) return this; // not listening for removeListener, no need to emit\n\n  if (events.removeListener === undefined) {\n    if (arguments.length === 0) {\n      this._events = Object.create(null);\n      this._eventsCount = 0;\n    } else if (events[type] !== undefined) {\n      if (--this._eventsCount === 0) this._events = Object.create(null);else delete events[type];\n    }\n\n    return this;\n  } // emit removeListener for all listeners on all events\n\n\n  if (arguments.length === 0) {\n    var keys = Object.keys(events);\n    var key;\n\n    for (i = 0; i < keys.length; ++i) {\n      key = keys[i];\n      if (key === 'removeListener') continue;\n      this.removeAllListeners(key);\n    }\n\n    this.removeAllListeners('removeListener');\n    this._events = Object.create(null);\n    this._eventsCount = 0;\n    return this;\n  }\n\n  listeners = events[type];\n\n  if (typeof listeners === 'function') {\n    this.removeListener(type, listeners);\n  } else if (listeners !== undefined) {\n    // LIFO order\n    for (i = listeners.length - 1; i >= 0; i--) {\n      this.removeListener(type, listeners[i]);\n    }\n  }\n\n  return this;\n};\n\nfunction _listeners(target, type, unwrap) {\n  var events = target._events;\n  if (events === undefined) return [];\n  var evlistener = events[type];\n  if (evlistener === undefined) return [];\n  if (typeof evlistener === 'function') return unwrap ? [evlistener.listener || evlistener] : [evlistener];\n  return unwrap ? unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);\n}\n\nEventEmitter.prototype.listeners = function listeners(type) {\n  return _listeners(this, type, true);\n};\n\nEventEmitter.prototype.rawListeners = function rawListeners(type) {\n  return _listeners(this, type, false);\n};\n\nEventEmitter.listenerCount = function (emitter, type) {\n  if (typeof emitter.listenerCount === 'function') {\n    return emitter.listenerCount(type);\n  } else {\n    return listenerCount.call(emitter, type);\n  }\n};\n\nEventEmitter.prototype.listenerCount = listenerCount;\n\nfunction listenerCount(type) {\n  var events = this._events;\n\n  if (events !== undefined) {\n    var evlistener = events[type];\n\n    if (typeof evlistener === 'function') {\n      return 1;\n    } else if (evlistener !== undefined) {\n      return evlistener.length;\n    }\n  }\n\n  return 0;\n}\n\nEventEmitter.prototype.eventNames = function eventNames() {\n  return this._eventsCount > 0 ? ReflectOwnKeys(this._events) : [];\n};\n\nfunction arrayClone(arr, n) {\n  var copy = new Array(n);\n\n  for (var i = 0; i < n; ++i) {\n    copy[i] = arr[i];\n  }\n\n  return copy;\n}\n\nfunction spliceOne(list, index) {\n  for (; index + 1 < list.length; index++) {\n    list[index] = list[index + 1];\n  }\n\n  list.pop();\n}\n\nfunction unwrapListeners(arr) {\n  var ret = new Array(arr.length);\n\n  for (var i = 0; i < ret.length; ++i) {\n    ret[i] = arr[i].listener || arr[i];\n  }\n\n  return ret;\n}\n\nfunction once(emitter, name) {\n  return new Promise(function (resolve, reject) {\n    function errorListener(err) {\n      emitter.removeListener(name, resolver);\n      reject(err);\n    }\n\n    function resolver() {\n      if (typeof emitter.removeListener === 'function') {\n        emitter.removeListener('error', errorListener);\n      }\n\n      resolve([].slice.call(arguments));\n    }\n\n    ;\n    eventTargetAgnosticAddListener(emitter, name, resolver, {\n      once: true\n    });\n\n    if (name !== 'error') {\n      addErrorHandlerIfEventEmitter(emitter, errorListener, {\n        once: true\n      });\n    }\n  });\n}\n\nfunction addErrorHandlerIfEventEmitter(emitter, handler, flags) {\n  if (typeof emitter.on === 'function') {\n    eventTargetAgnosticAddListener(emitter, 'error', handler, flags);\n  }\n}\n\nfunction eventTargetAgnosticAddListener(emitter, name, listener, flags) {\n  if (typeof emitter.on === 'function') {\n    if (flags.once) {\n      emitter.once(name, listener);\n    } else {\n      emitter.on(name, listener);\n    }\n  } else if (typeof emitter.addEventListener === 'function') {\n    // EventTarget does not have `error` event semantics like Node\n    // EventEmitters, we do not listen for `error` events here.\n    emitter.addEventListener(name, function wrapListener(arg) {\n      // IE does not have builtin `{ once: true }` support so we\n      // have to do it manually.\n      if (flags.once) {\n        emitter.removeEventListener(name, wrapListener);\n      }\n\n      listener(arg);\n    });\n  } else {\n    throw new TypeError('The \"emitter\" argument must be of type EventEmitter. Received type ' + typeof emitter);\n  }\n}","/*! safe-buffer. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */\n\n/* eslint-disable node/no-deprecated-api */\nvar buffer = require('buffer');\n\nvar Buffer = buffer.Buffer; // alternative to using Object.keys for old browsers\n\nfunction copyProps(src, dst) {\n  for (var key in src) {\n    dst[key] = src[key];\n  }\n}\n\nif (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {\n  module.exports = buffer;\n} else {\n  // Copy properties from require('buffer')\n  copyProps(buffer, exports);\n  exports.Buffer = SafeBuffer;\n}\n\nfunction SafeBuffer(arg, encodingOrOffset, length) {\n  return Buffer(arg, encodingOrOffset, length);\n}\n\nSafeBuffer.prototype = Object.create(Buffer.prototype); // Copy static methods from Buffer\n\ncopyProps(Buffer, SafeBuffer);\n\nSafeBuffer.from = function (arg, encodingOrOffset, length) {\n  if (typeof arg === 'number') {\n    throw new TypeError('Argument must not be a number');\n  }\n\n  return Buffer(arg, encodingOrOffset, length);\n};\n\nSafeBuffer.alloc = function (size, fill, encoding) {\n  if (typeof size !== 'number') {\n    throw new TypeError('Argument must be a number');\n  }\n\n  var buf = Buffer(size);\n\n  if (fill !== undefined) {\n    if (typeof encoding === 'string') {\n      buf.fill(fill, encoding);\n    } else {\n      buf.fill(fill);\n    }\n  } else {\n    buf.fill(0);\n  }\n\n  return buf;\n};\n\nSafeBuffer.allocUnsafe = function (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('Argument must be a number');\n  }\n\n  return Buffer(size);\n};\n\nSafeBuffer.allocUnsafeSlow = function (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('Argument must be a number');\n  }\n\n  return buffer.SlowBuffer(size);\n};","/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */\nexports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m;\n  var eLen = nBytes * 8 - mLen - 1;\n  var eMax = (1 << eLen) - 1;\n  var eBias = eMax >> 1;\n  var nBits = -7;\n  var i = isLE ? nBytes - 1 : 0;\n  var d = isLE ? -1 : 1;\n  var s = buffer[offset + i];\n  i += d;\n  e = s & (1 << -nBits) - 1;\n  s >>= -nBits;\n  nBits += eLen;\n\n  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & (1 << -nBits) - 1;\n  e >>= -nBits;\n  nBits += mLen;\n\n  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias;\n  } else if (e === eMax) {\n    return m ? NaN : (s ? -1 : 1) * Infinity;\n  } else {\n    m = m + Math.pow(2, mLen);\n    e = e - eBias;\n  }\n\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen);\n};\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c;\n  var eLen = nBytes * 8 - mLen - 1;\n  var eMax = (1 << eLen) - 1;\n  var eBias = eMax >> 1;\n  var rt = mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0;\n  var i = isLE ? 0 : nBytes - 1;\n  var d = isLE ? 1 : -1;\n  var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;\n  value = Math.abs(value);\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0;\n    e = eMax;\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2);\n\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--;\n      c *= 2;\n    }\n\n    if (e + eBias >= 1) {\n      value += rt / c;\n    } else {\n      value += rt * Math.pow(2, 1 - eBias);\n    }\n\n    if (value * c >= 2) {\n      e++;\n      c /= 2;\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0;\n      e = eMax;\n    } else if (e + eBias >= 1) {\n      m = (value * c - 1) * Math.pow(2, mLen);\n      e = e + eBias;\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);\n      e = 0;\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = e << mLen | m;\n  eLen += mLen;\n\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128;\n};","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n'use strict';\n/*<replacement>*/\n\nvar Buffer = require('safe-buffer').Buffer;\n/*</replacement>*/\n\n\nvar isEncoding = Buffer.isEncoding || function (encoding) {\n  encoding = '' + encoding;\n\n  switch (encoding && encoding.toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n    case 'raw':\n      return true;\n\n    default:\n      return false;\n  }\n};\n\nfunction _normalizeEncoding(enc) {\n  if (!enc) return 'utf8';\n  var retried;\n\n  while (true) {\n    switch (enc) {\n      case 'utf8':\n      case 'utf-8':\n        return 'utf8';\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return 'utf16le';\n\n      case 'latin1':\n      case 'binary':\n        return 'latin1';\n\n      case 'base64':\n      case 'ascii':\n      case 'hex':\n        return enc;\n\n      default:\n        if (retried) return; // undefined\n\n        enc = ('' + enc).toLowerCase();\n        retried = true;\n    }\n  }\n}\n\n; // Do not cache `Buffer.isEncoding` when checking encoding names as some\n// modules monkey-patch it to support additional encodings\n\nfunction normalizeEncoding(enc) {\n  var nenc = _normalizeEncoding(enc);\n\n  if (typeof nenc !== 'string' && (Buffer.isEncoding === isEncoding || !isEncoding(enc))) throw new Error('Unknown encoding: ' + enc);\n  return nenc || enc;\n} // StringDecoder provides an interface for efficiently splitting a series of\n// buffers into a series of JS strings without breaking apart multi-byte\n// characters.\n\n\nexports.StringDecoder = StringDecoder;\n\nfunction StringDecoder(encoding) {\n  this.encoding = normalizeEncoding(encoding);\n  var nb;\n\n  switch (this.encoding) {\n    case 'utf16le':\n      this.text = utf16Text;\n      this.end = utf16End;\n      nb = 4;\n      break;\n\n    case 'utf8':\n      this.fillLast = utf8FillLast;\n      nb = 4;\n      break;\n\n    case 'base64':\n      this.text = base64Text;\n      this.end = base64End;\n      nb = 3;\n      break;\n\n    default:\n      this.write = simpleWrite;\n      this.end = simpleEnd;\n      return;\n  }\n\n  this.lastNeed = 0;\n  this.lastTotal = 0;\n  this.lastChar = Buffer.allocUnsafe(nb);\n}\n\nStringDecoder.prototype.write = function (buf) {\n  if (buf.length === 0) return '';\n  var r;\n  var i;\n\n  if (this.lastNeed) {\n    r = this.fillLast(buf);\n    if (r === undefined) return '';\n    i = this.lastNeed;\n    this.lastNeed = 0;\n  } else {\n    i = 0;\n  }\n\n  if (i < buf.length) return r ? r + this.text(buf, i) : this.text(buf, i);\n  return r || '';\n};\n\nStringDecoder.prototype.end = utf8End; // Returns only complete characters in a Buffer\n\nStringDecoder.prototype.text = utf8Text; // Attempts to complete a partial non-UTF-8 character using bytes from a Buffer\n\nStringDecoder.prototype.fillLast = function (buf) {\n  if (this.lastNeed <= buf.length) {\n    buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, this.lastNeed);\n    return this.lastChar.toString(this.encoding, 0, this.lastTotal);\n  }\n\n  buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, buf.length);\n  this.lastNeed -= buf.length;\n}; // Checks the type of a UTF-8 byte, whether it's ASCII, a leading byte, or a\n// continuation byte. If an invalid byte is detected, -2 is returned.\n\n\nfunction utf8CheckByte(byte) {\n  if (byte <= 0x7F) return 0;else if (byte >> 5 === 0x06) return 2;else if (byte >> 4 === 0x0E) return 3;else if (byte >> 3 === 0x1E) return 4;\n  return byte >> 6 === 0x02 ? -1 : -2;\n} // Checks at most 3 bytes at the end of a Buffer in order to detect an\n// incomplete multi-byte UTF-8 character. The total number of bytes (2, 3, or 4)\n// needed to complete the UTF-8 character (if applicable) are returned.\n\n\nfunction utf8CheckIncomplete(self, buf, i) {\n  var j = buf.length - 1;\n  if (j < i) return 0;\n  var nb = utf8CheckByte(buf[j]);\n\n  if (nb >= 0) {\n    if (nb > 0) self.lastNeed = nb - 1;\n    return nb;\n  }\n\n  if (--j < i || nb === -2) return 0;\n  nb = utf8CheckByte(buf[j]);\n\n  if (nb >= 0) {\n    if (nb > 0) self.lastNeed = nb - 2;\n    return nb;\n  }\n\n  if (--j < i || nb === -2) return 0;\n  nb = utf8CheckByte(buf[j]);\n\n  if (nb >= 0) {\n    if (nb > 0) {\n      if (nb === 2) nb = 0;else self.lastNeed = nb - 3;\n    }\n\n    return nb;\n  }\n\n  return 0;\n} // Validates as many continuation bytes for a multi-byte UTF-8 character as\n// needed or are available. If we see a non-continuation byte where we expect\n// one, we \"replace\" the validated continuation bytes we've seen so far with\n// a single UTF-8 replacement character ('\\ufffd'), to match v8's UTF-8 decoding\n// behavior. The continuation byte check is included three times in the case\n// where all of the continuation bytes for a character exist in the same buffer.\n// It is also done this way as a slight performance increase instead of using a\n// loop.\n\n\nfunction utf8CheckExtraBytes(self, buf, p) {\n  if ((buf[0] & 0xC0) !== 0x80) {\n    self.lastNeed = 0;\n    return \"\\uFFFD\";\n  }\n\n  if (self.lastNeed > 1 && buf.length > 1) {\n    if ((buf[1] & 0xC0) !== 0x80) {\n      self.lastNeed = 1;\n      return \"\\uFFFD\";\n    }\n\n    if (self.lastNeed > 2 && buf.length > 2) {\n      if ((buf[2] & 0xC0) !== 0x80) {\n        self.lastNeed = 2;\n        return \"\\uFFFD\";\n      }\n    }\n  }\n} // Attempts to complete a multi-byte UTF-8 character using bytes from a Buffer.\n\n\nfunction utf8FillLast(buf) {\n  var p = this.lastTotal - this.lastNeed;\n  var r = utf8CheckExtraBytes(this, buf, p);\n  if (r !== undefined) return r;\n\n  if (this.lastNeed <= buf.length) {\n    buf.copy(this.lastChar, p, 0, this.lastNeed);\n    return this.lastChar.toString(this.encoding, 0, this.lastTotal);\n  }\n\n  buf.copy(this.lastChar, p, 0, buf.length);\n  this.lastNeed -= buf.length;\n} // Returns all complete UTF-8 characters in a Buffer. If the Buffer ended on a\n// partial character, the character's bytes are buffered until the required\n// number of bytes are available.\n\n\nfunction utf8Text(buf, i) {\n  var total = utf8CheckIncomplete(this, buf, i);\n  if (!this.lastNeed) return buf.toString('utf8', i);\n  this.lastTotal = total;\n  var end = buf.length - (total - this.lastNeed);\n  buf.copy(this.lastChar, 0, end);\n  return buf.toString('utf8', i, end);\n} // For UTF-8, a replacement character is added when ending on a partial\n// character.\n\n\nfunction utf8End(buf) {\n  var r = buf && buf.length ? this.write(buf) : '';\n  if (this.lastNeed) return r + \"\\uFFFD\";\n  return r;\n} // UTF-16LE typically needs two bytes per character, but even if we have an even\n// number of bytes available, we need to check if we end on a leading/high\n// surrogate. In that case, we need to wait for the next two bytes in order to\n// decode the last character properly.\n\n\nfunction utf16Text(buf, i) {\n  if ((buf.length - i) % 2 === 0) {\n    var r = buf.toString('utf16le', i);\n\n    if (r) {\n      var c = r.charCodeAt(r.length - 1);\n\n      if (c >= 0xD800 && c <= 0xDBFF) {\n        this.lastNeed = 2;\n        this.lastTotal = 4;\n        this.lastChar[0] = buf[buf.length - 2];\n        this.lastChar[1] = buf[buf.length - 1];\n        return r.slice(0, -1);\n      }\n    }\n\n    return r;\n  }\n\n  this.lastNeed = 1;\n  this.lastTotal = 2;\n  this.lastChar[0] = buf[buf.length - 1];\n  return buf.toString('utf16le', i, buf.length - 1);\n} // For UTF-16LE we do not explicitly append special replacement characters if we\n// end on a partial character, we simply let v8 handle that.\n\n\nfunction utf16End(buf) {\n  var r = buf && buf.length ? this.write(buf) : '';\n\n  if (this.lastNeed) {\n    var end = this.lastTotal - this.lastNeed;\n    return r + this.lastChar.toString('utf16le', 0, end);\n  }\n\n  return r;\n}\n\nfunction base64Text(buf, i) {\n  var n = (buf.length - i) % 3;\n  if (n === 0) return buf.toString('base64', i);\n  this.lastNeed = 3 - n;\n  this.lastTotal = 3;\n\n  if (n === 1) {\n    this.lastChar[0] = buf[buf.length - 1];\n  } else {\n    this.lastChar[0] = buf[buf.length - 2];\n    this.lastChar[1] = buf[buf.length - 1];\n  }\n\n  return buf.toString('base64', i, buf.length - n);\n}\n\nfunction base64End(buf) {\n  var r = buf && buf.length ? this.write(buf) : '';\n  if (this.lastNeed) return r + this.lastChar.toString('base64', 0, 3 - this.lastNeed);\n  return r;\n} // Pass bytes on through for single-byte encodings (e.g. ascii, latin1, hex)\n\n\nfunction simpleWrite(buf) {\n  return buf.toString(this.encoding);\n}\n\nfunction simpleEnd(buf) {\n  return buf && buf.length ? this.write(buf) : '';\n}"],"sourceRoot":""}