@ralphwetzel/node-red-ds2482-mcu/mcu/buffer.js

DS2482 I2C 1-Wire Master controller for Node-RED w/ MCU support

/*
    This module is based on buffer:

    *
    * The buffer module from node.js, for the browser.
    *
    * @author   Feross Aboukhadijeh <https://feross.org>
    * @license  MIT
    *

    Adaptations to node-red-mcu by @ralphwetzel
    https://github.com/ralphwetzel/node-red-ds2482-mcu
    License: MIT

    Attention:
    !! This module covers just a subset of the original code.
    !! It is stripped down to the functions demanded by the ds2482-mcu!

*/


/* eslint-disable no-proto */

'use strict'

// const base64 = require('base64-js')
// const ieee754 = require('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

// exports.Buffer = Buffer
// exports.SlowBuffer = SlowBuffer
// exports.INSPECT_MAX_BYTES = 50

const K_MAX_LENGTH = 0xffff   // this is just a SmallBuffer! ;)
// exports.kMaxLength = K_MAX_LENGTH

/**
 * 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.buffer, buf.byteOffset, buf.byteLength)
//         }
//         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 = exports.INSPECT_MAX_BYTES
//   str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
//   if (this.length > max) str += ' ... '
//   return '<Buffer ' + str + '>'
// }
// 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