var BSON = (function (exports) {
	'use strict';

	function createCommonjsModule(fn, module) {
		return module = { exports: {} }, fn(module, module.exports), module.exports;
	}

	var byteLength_1 = byteLength;
	var toByteArray_1 = toByteArray;
	var fromByteArray_1 = fromByteArray;
	var lookup = [];
	var revLookup = [];
	var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array;
	var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';

	for (var i = 0, len = code.length; i < len; ++i) {
	  lookup[i] = code[i];
	  revLookup[code.charCodeAt(i)] = i;
	} // Support decoding URL-safe base64 strings, as Node.js does.
	// See: https://en.wikipedia.org/wiki/Base64#URL_applications


	revLookup['-'.charCodeAt(0)] = 62;
	revLookup['_'.charCodeAt(0)] = 63;

	function getLens(b64) {
	  var len = b64.length;

	  if (len % 4 > 0) {
	    throw new Error('Invalid string. Length must be a multiple of 4');
	  } // Trim off extra bytes after placeholder bytes are found
	  // See: https://github.com/beatgammit/base64-js/issues/42


	  var validLen = b64.indexOf('=');
	  if (validLen === -1) validLen = len;
	  var placeHoldersLen = validLen === len ? 0 : 4 - validLen % 4;
	  return [validLen, placeHoldersLen];
	} // base64 is 4/3 + up to two characters of the original data


	function byteLength(b64) {
	  var lens = getLens(b64);
	  var validLen = lens[0];
	  var placeHoldersLen = lens[1];
	  return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;
	}

	function _byteLength(b64, validLen, placeHoldersLen) {
	  return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;
	}

	function toByteArray(b64) {
	  var tmp;
	  var lens = getLens(b64);
	  var validLen = lens[0];
	  var placeHoldersLen = lens[1];
	  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen));
	  var curByte = 0; // if there are placeholders, only get up to the last complete 4 chars

	  var len = placeHoldersLen > 0 ? validLen - 4 : validLen;
	  var i;

	  for (i = 0; i < len; i += 4) {
	    tmp = revLookup[b64.charCodeAt(i)] << 18 | revLookup[b64.charCodeAt(i + 1)] << 12 | revLookup[b64.charCodeAt(i + 2)] << 6 | revLookup[b64.charCodeAt(i + 3)];
	    arr[curByte++] = tmp >> 16 & 0xFF;
	    arr[curByte++] = tmp >> 8 & 0xFF;
	    arr[curByte++] = tmp & 0xFF;
	  }

	  if (placeHoldersLen === 2) {
	    tmp = revLookup[b64.charCodeAt(i)] << 2 | revLookup[b64.charCodeAt(i + 1)] >> 4;
	    arr[curByte++] = tmp & 0xFF;
	  }

	  if (placeHoldersLen === 1) {
	    tmp = revLookup[b64.charCodeAt(i)] << 10 | revLookup[b64.charCodeAt(i + 1)] << 4 | revLookup[b64.charCodeAt(i + 2)] >> 2;
	    arr[curByte++] = tmp >> 8 & 0xFF;
	    arr[curByte++] = tmp & 0xFF;
	  }

	  return arr;
	}

	function tripletToBase64(num) {
	  return lookup[num >> 18 & 0x3F] + lookup[num >> 12 & 0x3F] + lookup[num >> 6 & 0x3F] + lookup[num & 0x3F];
	}

	function encodeChunk(uint8, start, end) {
	  var tmp;
	  var output = [];

	  for (var i = start; i < end; i += 3) {
	    tmp = (uint8[i] << 16 & 0xFF0000) + (uint8[i + 1] << 8 & 0xFF00) + (uint8[i + 2] & 0xFF);
	    output.push(tripletToBase64(tmp));
	  }

	  return output.join('');
	}

	function fromByteArray(uint8) {
	  var tmp;
	  var len = uint8.length;
	  var extraBytes = len % 3; // if we have 1 byte left, pad 2 bytes

	  var parts = [];
	  var maxChunkLength = 16383; // must be multiple of 3
	  // go through the array every three bytes, we'll deal with trailing stuff later

	  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
	    parts.push(encodeChunk(uint8, i, i + maxChunkLength > len2 ? len2 : i + maxChunkLength));
	  } // pad the end with zeros, but make sure to not forget the extra bytes


	  if (extraBytes === 1) {
	    tmp = uint8[len - 1];
	    parts.push(lookup[tmp >> 2] + lookup[tmp << 4 & 0x3F] + '==');
	  } else if (extraBytes === 2) {
	    tmp = (uint8[len - 2] << 8) + uint8[len - 1];
	    parts.push(lookup[tmp >> 10] + lookup[tmp >> 4 & 0x3F] + lookup[tmp << 2 & 0x3F] + '=');
	  }

	  return parts.join('');
	}

	var base64Js = {
	  byteLength: byteLength_1,
	  toByteArray: toByteArray_1,
	  fromByteArray: fromByteArray_1
	};

	/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
	var read = function read(buffer, offset, isLE, mLen, nBytes) {
	  var e, m;
	  var eLen = nBytes * 8 - mLen - 1;
	  var eMax = (1 << eLen) - 1;
	  var eBias = eMax >> 1;
	  var nBits = -7;
	  var i = isLE ? nBytes - 1 : 0;
	  var d = isLE ? -1 : 1;
	  var s = buffer[offset + i];
	  i += d;
	  e = s & (1 << -nBits) - 1;
	  s >>= -nBits;
	  nBits += eLen;

	  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}

	  m = e & (1 << -nBits) - 1;
	  e >>= -nBits;
	  nBits += mLen;

	  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}

	  if (e === 0) {
	    e = 1 - eBias;
	  } else if (e === eMax) {
	    return m ? NaN : (s ? -1 : 1) * Infinity;
	  } else {
	    m = m + Math.pow(2, mLen);
	    e = e - eBias;
	  }

	  return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
	};

	var write = function write(buffer, value, offset, isLE, mLen, nBytes) {
	  var e, m, c;
	  var eLen = nBytes * 8 - mLen - 1;
	  var eMax = (1 << eLen) - 1;
	  var eBias = eMax >> 1;
	  var rt = mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0;
	  var i = isLE ? 0 : nBytes - 1;
	  var d = isLE ? 1 : -1;
	  var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;
	  value = Math.abs(value);

	  if (isNaN(value) || value === Infinity) {
	    m = isNaN(value) ? 1 : 0;
	    e = eMax;
	  } else {
	    e = Math.floor(Math.log(value) / Math.LN2);

	    if (value * (c = Math.pow(2, -e)) < 1) {
	      e--;
	      c *= 2;
	    }

	    if (e + eBias >= 1) {
	      value += rt / c;
	    } else {
	      value += rt * Math.pow(2, 1 - eBias);
	    }

	    if (value * c >= 2) {
	      e++;
	      c /= 2;
	    }

	    if (e + eBias >= eMax) {
	      m = 0;
	      e = eMax;
	    } else if (e + eBias >= 1) {
	      m = (value * c - 1) * Math.pow(2, mLen);
	      e = e + eBias;
	    } else {
	      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
	      e = 0;
	    }
	  }

	  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}

	  e = e << mLen | m;
	  eLen += mLen;

	  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}

	  buffer[offset + i - d] |= s * 128;
	};

	var ieee754 = {
	  read: read,
	  write: write
	};

	var buffer$1 = createCommonjsModule(function (module, exports) {

	  var 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;
	  var K_MAX_LENGTH = 0x7fffffff;
	  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 {
	      var arr = new Uint8Array(1);
	      var proto = {
	        foo: function foo() {
	          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 get() {
	      if (!Buffer.isBuffer(this)) return undefined;
	      return this.buffer;
	    }
	  });
	  Object.defineProperty(Buffer.prototype, 'offset', {
	    enumerable: true,
	    get: function get() {
	      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


	    var 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 ' + babelHelpers["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');
	    }

	    var valueOf = value.valueOf && value.valueOf();

	    if (valueOf != null && valueOf !== value) {
	      return Buffer.from(valueOf, encodingOrOffset, length);
	    }

	    var 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 ' + babelHelpers["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);
	    }

	    var length = byteLength(string, encoding) | 0;
	    var buf = createBuffer(length);
	    var 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) {
	    var length = array.length < 0 ? 0 : checked(array.length) | 0;
	    var buf = createBuffer(length);

	    for (var i = 0; i < length; i += 1) {
	      buf[i] = array[i] & 255;
	    }

	    return buf;
	  }

	  function fromArrayView(arrayView) {
	    if (isInstance(arrayView, Uint8Array)) {
	      var 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');
	    }

	    var 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)) {
	      var len = checked(obj.length) | 0;
	      var 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;
	    var x = a.length;
	    var y = b.length;

	    for (var 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);
	    }

	    var i;

	    if (length === undefined) {
	      length = 0;

	      for (i = 0; i < list.length; ++i) {
	        length += list[i].length;
	      }
	    }

	    var buffer = Buffer.allocUnsafe(length);
	    var pos = 0;

	    for (i = 0; i < list.length; ++i) {
	      var buf = list[i];

	      if (isInstance(buf, Uint8Array)) {
	        if (pos + buf.length > buffer.length) {
	          Buffer.from(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 ' + babelHelpers["typeof"](string));
	    }

	    var len = string.length;
	    var mustMatch = arguments.length > 2 && arguments[2] === true;
	    if (!mustMatch && len === 0) return 0; // Use a for loop to avoid recursion

	    var 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) {
	    var 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) {
	    var i = b[n];
	    b[n] = b[m];
	    b[m] = i;
	  }

	  Buffer.prototype.swap16 = function swap16() {
	    var len = this.length;

	    if (len % 2 !== 0) {
	      throw new RangeError('Buffer size must be a multiple of 16-bits');
	    }

	    for (var i = 0; i < len; i += 2) {
	      swap(this, i, i + 1);
	    }

	    return this;
	  };

	  Buffer.prototype.swap32 = function swap32() {
	    var len = this.length;

	    if (len % 4 !== 0) {
	      throw new RangeError('Buffer size must be a multiple of 32-bits');
	    }

	    for (var i = 0; i < len; i += 4) {
	      swap(this, i, i + 3);
	      swap(this, i + 1, i + 2);
	    }

	    return this;
	  };

	  Buffer.prototype.swap64 = function swap64() {
	    var len = this.length;

	    if (len % 8 !== 0) {
	      throw new RangeError('Buffer size must be a multiple of 64-bits');
	    }

	    for (var 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() {
	    var 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() {
	    var str = '';
	    var 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 ' + babelHelpers["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;
	    var x = thisEnd - thisStart;
	    var y = end - start;
	    var len = Math.min(x, y);
	    var thisCopy = this.slice(thisStart, thisEnd);
	    var targetCopy = target.slice(start, end);

	    for (var 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) {
	    var indexSize = 1;
	    var arrLength = arr.length;
	    var 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);
	      }
	    }

	    var i;

	    if (dir) {
	      var 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--) {
	        var found = true;

	        for (var 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;
	    var remaining = buf.length - offset;

	    if (!length) {
	      length = remaining;
	    } else {
	      length = Number(length);

	      if (length > remaining) {
	        length = remaining;
	      }
	    }

	    var strLen = string.length;

	    if (length > strLen / 2) {
	      length = strLen / 2;
	    }

	    for (var i = 0; i < length; ++i) {
	      var 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');
	    }

	    var 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';
	    var 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 base64Js.fromByteArray(buf);
	    } else {
	      return base64Js.fromByteArray(buf.slice(start, end));
	    }
	  }

	  function utf8Slice(buf, start, end) {
	    end = Math.min(buf.length, end);
	    var res = [];
	    var i = start;

	    while (i < end) {
	      var firstByte = buf[i];
	      var codePoint = null;
	      var bytesPerSequence = firstByte > 0xEF ? 4 : firstByte > 0xDF ? 3 : firstByte > 0xBF ? 2 : 1;

	      if (i + bytesPerSequence <= end) {
	        var 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


	  var MAX_ARGUMENTS_LENGTH = 0x1000;

	  function decodeCodePointsArray(codePoints) {
	    var 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".


	    var res = '';
	    var i = 0;

	    while (i < len) {
	      res += String.fromCharCode.apply(String, codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH));
	    }

	    return res;
	  }

	  function asciiSlice(buf, start, end) {
	    var ret = '';
	    end = Math.min(buf.length, end);

	    for (var i = start; i < end; ++i) {
	      ret += String.fromCharCode(buf[i] & 0x7F);
	    }

	    return ret;
	  }

	  function latin1Slice(buf, start, end) {
	    var ret = '';
	    end = Math.min(buf.length, end);

	    for (var i = start; i < end; ++i) {
	      ret += String.fromCharCode(buf[i]);
	    }

	    return ret;
	  }

	  function hexSlice(buf, start, end) {
	    var len = buf.length;
	    if (!start || start < 0) start = 0;
	    if (!end || end < 0 || end > len) end = len;
	    var out = '';

	    for (var i = start; i < end; ++i) {
	      out += hexSliceLookupTable[buf[i]];
	    }

	    return out;
	  }

	  function utf16leSlice(buf, start, end) {
	    var bytes = buf.slice(start, end);
	    var res = ''; // If bytes.length is odd, the last 8 bits must be ignored (same as node.js)

	    for (var 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) {
	    var 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;
	    var 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);
	    var val = this[offset];
	    var mul = 1;
	    var 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);
	    }

	    var val = this[offset + --byteLength];
	    var 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.readIntLE = function readIntLE(offset, byteLength, noAssert) {
	    offset = offset >>> 0;
	    byteLength = byteLength >>> 0;
	    if (!noAssert) checkOffset(offset, byteLength, this.length);
	    var val = this[offset];
	    var mul = 1;
	    var 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);
	    var i = byteLength;
	    var mul = 1;
	    var 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);
	    var 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);
	    var 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.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) {
	      var maxBytes = Math.pow(2, 8 * byteLength) - 1;
	      checkInt(this, value, offset, byteLength, maxBytes, 0);
	    }

	    var mul = 1;
	    var 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) {
	      var maxBytes = Math.pow(2, 8 * byteLength) - 1;
	      checkInt(this, value, offset, byteLength, maxBytes, 0);
	    }

	    var i = byteLength - 1;
	    var 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;
	  };

	  Buffer.prototype.writeIntLE = function writeIntLE(value, offset, byteLength, noAssert) {
	    value = +value;
	    offset = offset >>> 0;

	    if (!noAssert) {
	      var limit = Math.pow(2, 8 * byteLength - 1);
	      checkInt(this, value, offset, byteLength, limit - 1, -limit);
	    }

	    var i = 0;
	    var mul = 1;
	    var 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) {
	      var limit = Math.pow(2, 8 * byteLength - 1);
	      checkInt(this, value, offset, byteLength, limit - 1, -limit);
	    }

	    var i = byteLength - 1;
	    var mul = 1;
	    var 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;
	  };

	  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);
	    }

	    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);
	    }

	    ieee754.write(buf, value, offset, littleEndian, 52, 8);
	    return offset + 8;
	  }

	  Buffer.prototype.writeDoubleLE = function writeDoubleLE(value, offset, noAssert) {
	    return writeDouble(this, value, offset, true, noAssert);
	  };

	  Buffer.prototype.writeDoubleBE = function writeDoubleBE(value, offset, noAssert) {
	    return writeDouble(this, value, offset, false, noAssert);
	  }; // copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)


	  Buffer.prototype.copy = function copy(target, targetStart, start, end) {
	    if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer');
	    if (!start) start = 0;
	    if (!end && end !== 0) end = this.length;
	    if (targetStart >= target.length) targetStart = target.length;
	    if (!targetStart) targetStart = 0;
	    if (end > 0 && end < start) end = start; // Copy 0 bytes; we're done

	    if (end === start) return 0;
	    if (target.length === 0 || this.length === 0) return 0; // Fatal error conditions

	    if (targetStart < 0) {
	      throw new RangeError('targetStart out of bounds');
	    }

	    if (start < 0 || start >= this.length) throw new RangeError('Index out of range');
	    if (end < 0) throw new RangeError('sourceEnd out of bounds'); // Are we oob?

	    if (end > this.length) end = this.length;

	    if (target.length - targetStart < end - start) {
	      end = target.length - targetStart + start;
	    }

	    var len = end - start;

	    if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
	      // Use built-in when available, missing from IE11
	      this.copyWithin(targetStart, start, end);
	    } else {
	      Uint8Array.prototype.set.call(target, this.subarray(start, end), targetStart);
	    }

	    return len;
	  }; // Usage:
	  //    buffer.fill(number[, offset[, end]])
	  //    buffer.fill(buffer[, offset[, end]])
	  //    buffer.fill(string[, offset[, end]][, encoding])


	  Buffer.prototype.fill = function fill(val, start, end, encoding) {
	    // Handle string cases:
	    if (typeof val === 'string') {
	      if (typeof start === 'string') {
	        encoding = start;
	        start = 0;
	        end = this.length;
	      } else if (typeof end === 'string') {
	        encoding = end;
	        end = this.length;
	      }

	      if (encoding !== undefined && typeof encoding !== 'string') {
	        throw new TypeError('encoding must be a string');
	      }

	      if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
	        throw new TypeError('Unknown encoding: ' + encoding);
	      }

	      if (val.length === 1) {
	        var code = val.charCodeAt(0);

	        if (encoding === 'utf8' && code < 128 || encoding === 'latin1') {
	          // Fast path: If `val` fits into a single byte, use that numeric value.
	          val = code;
	        }
	      }
	    } else if (typeof val === 'number') {
	      val = val & 255;
	    } else if (typeof val === 'boolean') {
	      val = Number(val);
	    } // Invalid ranges are not set to a default, so can range check early.


	    if (start < 0 || this.length < start || this.length < end) {
	      throw new RangeError('Out of range index');
	    }

	    if (end <= start) {
	      return this;
	    }

	    start = start >>> 0;
	    end = end === undefined ? this.length : end >>> 0;
	    if (!val) val = 0;
	    var i;

	    if (typeof val === 'number') {
	      for (i = start; i < end; ++i) {
	        this[i] = val;
	      }
	    } else {
	      var bytes = Buffer.isBuffer(val) ? val : Buffer.from(val, encoding);
	      var len = bytes.length;

	      if (len === 0) {
	        throw new TypeError('The value "' + val + '" is invalid for argument "value"');
	      }

	      for (i = 0; i < end - start; ++i) {
	        this[i + start] = bytes[i % len];
	      }
	    }

	    return this;
	  }; // HELPER FUNCTIONS
	  // ================


	  var INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g;

	  function base64clean(str) {
	    // Node takes equal signs as end of the Base64 encoding
	    str = str.split('=')[0]; // Node strips out invalid characters like \n and \t from the string, base64-js does not

	    str = str.trim().replace(INVALID_BASE64_RE, ''); // Node converts strings with length < 2 to ''

	    if (str.length < 2) return ''; // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not

	    while (str.length % 4 !== 0) {
	      str = str + '=';
	    }

	    return str;
	  }

	  function utf8ToBytes(string, units) {
	    units = units || Infinity;
	    var codePoint;
	    var length = string.length;
	    var leadSurrogate = null;
	    var bytes = [];

	    for (var i = 0; i < length; ++i) {
	      codePoint = string.charCodeAt(i); // is surrogate component

	      if (codePoint > 0xD7FF && codePoint < 0xE000) {
	        // last char was a lead
	        if (!leadSurrogate) {
	          // no lead yet
	          if (codePoint > 0xDBFF) {
	            // unexpected trail
	            if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);
	            continue;
	          } else if (i + 1 === length) {
	            // unpaired lead
	            if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);
	            continue;
	          } // valid lead


	          leadSurrogate = codePoint;
	          continue;
	        } // 2 leads in a row


	        if (codePoint < 0xDC00) {
	          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);
	          leadSurrogate = codePoint;
	          continue;
	        } // valid surrogate pair


	        codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000;
	      } else if (leadSurrogate) {
	        // valid bmp char, but last char was a lead
	        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);
	      }

	      leadSurrogate = null; // encode utf8

	      if (codePoint < 0x80) {
	        if ((units -= 1) < 0) break;
	        bytes.push(codePoint);
	      } else if (codePoint < 0x800) {
	        if ((units -= 2) < 0) break;
	        bytes.push(codePoint >> 0x6 | 0xC0, codePoint & 0x3F | 0x80);
	      } else if (codePoint < 0x10000) {
	        if ((units -= 3) < 0) break;
	        bytes.push(codePoint >> 0xC | 0xE0, codePoint >> 0x6 & 0x3F | 0x80, codePoint & 0x3F | 0x80);
	      } else if (codePoint < 0x110000) {
	        if ((units -= 4) < 0) break;
	        bytes.push(codePoint >> 0x12 | 0xF0, codePoint >> 0xC & 0x3F | 0x80, codePoint >> 0x6 & 0x3F | 0x80, codePoint & 0x3F | 0x80);
	      } else {
	        throw new Error('Invalid code point');
	      }
	    }

	    return bytes;
	  }

	  function asciiToBytes(str) {
	    var byteArray = [];

	    for (var i = 0; i < str.length; ++i) {
	      // Node's code seems to be doing this and not & 0x7F..
	      byteArray.push(str.charCodeAt(i) & 0xFF);
	    }

	    return byteArray;
	  }

	  function utf16leToBytes(str, units) {
	    var c, hi, lo;
	    var byteArray = [];

	    for (var i = 0; i < str.length; ++i) {
	      if ((units -= 2) < 0) break;
	      c = str.charCodeAt(i);
	      hi = c >> 8;
	      lo = c % 256;
	      byteArray.push(lo);
	      byteArray.push(hi);
	    }

	    return byteArray;
	  }

	  function base64ToBytes(str) {
	    return base64Js.toByteArray(base64clean(str));
	  }

	  function blitBuffer(src, dst, offset, length) {
	    for (var i = 0; i < length; ++i) {
	      if (i + offset >= dst.length || i >= src.length) break;
	      dst[i + offset] = src[i];
	    }

	    return i;
	  } // ArrayBuffer or Uint8Array objects from other contexts (i.e. iframes) do not pass
	  // the `instanceof` check but they should be treated as of that type.
	  // See: https://github.com/feross/buffer/issues/166


	  function isInstance(obj, type) {
	    return obj instanceof type || obj != null && obj.constructor != null && obj.constructor.name != null && obj.constructor.name === type.name;
	  }

	  function numberIsNaN(obj) {
	    // For IE11 support
	    return obj !== obj; // eslint-disable-line no-self-compare
	  } // Create lookup table for `toString('hex')`
	  // See: https://github.com/feross/buffer/issues/219


	  var hexSliceLookupTable = function () {
	    var alphabet = '0123456789abcdef';
	    var table = new Array(256);

	    for (var i = 0; i < 16; ++i) {
	      var i16 = i * 16;

	      for (var j = 0; j < 16; ++j) {
	        table[i16 + j] = alphabet[i] + alphabet[j];
	      }
	    }

	    return table;
	  }();
	});
	var buffer_1 = buffer$1.Buffer;
	buffer$1.SlowBuffer;
	buffer$1.INSPECT_MAX_BYTES;
	buffer$1.kMaxLength;

	/*! *****************************************************************************
	Copyright (c) Microsoft Corporation.

	Permission to use, copy, modify, and/or distribute this software for any
	purpose with or without fee is hereby granted.

	THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
	REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
	AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
	INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
	LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
	OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
	PERFORMANCE OF THIS SOFTWARE.
	***************************************************************************** */

	/* global Reflect, Promise */
	var _extendStatics = function extendStatics(d, b) {
	  _extendStatics = Object.setPrototypeOf || {
	    __proto__: []
	  } instanceof Array && function (d, b) {
	    d.__proto__ = b;
	  } || function (d, b) {
	    for (var p in b) {
	      if (b.hasOwnProperty(p)) d[p] = b[p];
	    }
	  };

	  return _extendStatics(d, b);
	};

	function __extends(d, b) {
	  _extendStatics(d, b);

	  function __() {
	    this.constructor = d;
	  }

	  d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
	}

	var _assign = function __assign() {
	  _assign = Object.assign || function __assign(t) {
	    for (var s, i = 1, n = arguments.length; i < n; i++) {
	      s = arguments[i];

	      for (var p in s) {
	        if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
	      }
	    }

	    return t;
	  };

	  return _assign.apply(this, arguments);
	};

	/** @public */
	var BSONError = /** @class */ (function (_super) {
	    __extends(BSONError, _super);
	    function BSONError(message) {
	        var _this = _super.call(this, message) || this;
	        Object.setPrototypeOf(_this, BSONError.prototype);
	        return _this;
	    }
	    Object.defineProperty(BSONError.prototype, "name", {
	        get: function () {
	            return 'BSONError';
	        },
	        enumerable: false,
	        configurable: true
	    });
	    return BSONError;
	}(Error));
	/** @public */
	var BSONTypeError = /** @class */ (function (_super) {
	    __extends(BSONTypeError, _super);
	    function BSONTypeError(message) {
	        var _this = _super.call(this, message) || this;
	        Object.setPrototypeOf(_this, BSONTypeError.prototype);
	        return _this;
	    }
	    Object.defineProperty(BSONTypeError.prototype, "name", {
	        get: function () {
	            return 'BSONTypeError';
	        },
	        enumerable: false,
	        configurable: true
	    });
	    return BSONTypeError;
	}(TypeError));

	function checkForMath(potentialGlobal) {
	    // eslint-disable-next-line eqeqeq
	    return potentialGlobal && potentialGlobal.Math == Math && potentialGlobal;
	}
	// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
	function getGlobal() {
	    return (checkForMath(typeof globalThis === 'object' && globalThis) ||
	        checkForMath(typeof window === 'object' && window) ||
	        checkForMath(typeof self === 'object' && self) ||
	        checkForMath(typeof global === 'object' && global) ||
	        // eslint-disable-next-line @typescript-eslint/no-implied-eval
	        Function('return this')());
	}

	/**
	 * Normalizes our expected stringified form of a function across versions of node
	 * @param fn - The function to stringify
	 */
	function normalizedFunctionString(fn) {
	    return fn.toString().replace('function(', 'function (');
	}
	function isReactNative() {
	    var g = getGlobal();
	    return typeof g.navigator === 'object' && g.navigator.product === 'ReactNative';
	}
	var insecureRandomBytes = function insecureRandomBytes(size) {
	    var insecureWarning = isReactNative()
	        ? 'BSON: For React Native please polyfill crypto.getRandomValues, e.g. using: https://www.npmjs.com/package/react-native-get-random-values.'
	        : 'BSON: No cryptographic implementation for random bytes present, falling back to a less secure implementation.';
	    console.warn(insecureWarning);
	    var result = buffer_1.alloc(size);
	    for (var i = 0; i < size; ++i)
	        result[i] = Math.floor(Math.random() * 256);
	    return result;
	};
	var detectRandomBytes = function () {
	    {
	        if (typeof window !== 'undefined') {
	            // browser crypto implementation(s)
	            var target_1 = window.crypto || window.msCrypto; // allow for IE11
	            if (target_1 && target_1.getRandomValues) {
	                return function (size) { return target_1.getRandomValues(buffer_1.alloc(size)); };
	            }
	        }
	        if (typeof global !== 'undefined' && global.crypto && global.crypto.getRandomValues) {
	            // allow for RN packages such as https://www.npmjs.com/package/react-native-get-random-values to populate global
	            return function (size) { return global.crypto.getRandomValues(buffer_1.alloc(size)); };
	        }
	        return insecureRandomBytes;
	    }
	};
	var randomBytes = detectRandomBytes();
	function isAnyArrayBuffer(value) {
	    return ['[object ArrayBuffer]', '[object SharedArrayBuffer]'].includes(Object.prototype.toString.call(value));
	}
	function isUint8Array(value) {
	    return Object.prototype.toString.call(value) === '[object Uint8Array]';
	}
	function isBigInt64Array(value) {
	    return Object.prototype.toString.call(value) === '[object BigInt64Array]';
	}
	function isBigUInt64Array(value) {
	    return Object.prototype.toString.call(value) === '[object BigUint64Array]';
	}
	function isRegExp(d) {
	    return Object.prototype.toString.call(d) === '[object RegExp]';
	}
	function isMap(d) {
	    return Object.prototype.toString.call(d) === '[object Map]';
	}
	// To ensure that 0.4 of node works correctly
	function isDate(d) {
	    return isObjectLike(d) && Object.prototype.toString.call(d) === '[object Date]';
	}
	/**
	 * @internal
	 * this is to solve the `'someKey' in x` problem where x is unknown.
	 * https://github.com/typescript-eslint/typescript-eslint/issues/1071#issuecomment-541955753
	 */
	function isObjectLike(candidate) {
	    return typeof candidate === 'object' && candidate !== null;
	}
	function deprecate(fn, message) {
	    var warned = false;
	    function deprecated() {
	        var args = [];
	        for (var _i = 0; _i < arguments.length; _i++) {
	            args[_i] = arguments[_i];
	        }
	        if (!warned) {
	            console.warn(message);
	            warned = true;
	        }
	        return fn.apply(this, args);
	    }
	    return deprecated;
	}

	/**
	 * Makes sure that, if a Uint8Array is passed in, it is wrapped in a Buffer.
	 *
	 * @param potentialBuffer - The potential buffer
	 * @returns Buffer the input if potentialBuffer is a buffer, or a buffer that
	 * wraps a passed in Uint8Array
	 * @throws BSONTypeError If anything other than a Buffer or Uint8Array is passed in
	 */
	function ensureBuffer(potentialBuffer) {
	    if (ArrayBuffer.isView(potentialBuffer)) {
	        return buffer_1.from(potentialBuffer.buffer, potentialBuffer.byteOffset, potentialBuffer.byteLength);
	    }
	    if (isAnyArrayBuffer(potentialBuffer)) {
	        return buffer_1.from(potentialBuffer);
	    }
	    throw new BSONTypeError('Must use either Buffer or TypedArray');
	}

	// Validation regex for v4 uuid (validates with or without dashes)
	var VALIDATION_REGEX = /^(?:[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|[0-9a-f]{12}4[0-9a-f]{3}[89ab][0-9a-f]{15})$/i;
	var uuidValidateString = function (str) {
	    return typeof str === 'string' && VALIDATION_REGEX.test(str);
	};
	var uuidHexStringToBuffer = function (hexString) {
	    if (!uuidValidateString(hexString)) {
	        throw new BSONTypeError('UUID string representations must be a 32 or 36 character hex string (dashes excluded/included). Format: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" or "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx".');
	    }
	    var sanitizedHexString = hexString.replace(/-/g, '');
	    return buffer_1.from(sanitizedHexString, 'hex');
	};
	var bufferToUuidHexString = function (buffer, includeDashes) {
	    if (includeDashes === void 0) { includeDashes = true; }
	    return includeDashes
	        ? buffer.toString('hex', 0, 4) +
	            '-' +
	            buffer.toString('hex', 4, 6) +
	            '-' +
	            buffer.toString('hex', 6, 8) +
	            '-' +
	            buffer.toString('hex', 8, 10) +
	            '-' +
	            buffer.toString('hex', 10, 16)
	        : buffer.toString('hex');
	};

	/** @internal */
	var BSON_INT32_MAX$1 = 0x7fffffff;
	/** @internal */
	var BSON_INT32_MIN$1 = -0x80000000;
	/** @internal */
	var BSON_INT64_MAX$1 = Math.pow(2, 63) - 1;
	/** @internal */
	var BSON_INT64_MIN$1 = -Math.pow(2, 63);
	/**
	 * Any integer up to 2^53 can be precisely represented by a double.
	 * @internal
	 */
	var JS_INT_MAX = Math.pow(2, 53);
	/**
	 * Any integer down to -2^53 can be precisely represented by a double.
	 * @internal
	 */
	var JS_INT_MIN = -Math.pow(2, 53);
	/** Number BSON Type @internal */
	var BSON_DATA_NUMBER = 1;
	/** String BSON Type @internal */
	var BSON_DATA_STRING = 2;
	/** Object BSON Type @internal */
	var BSON_DATA_OBJECT = 3;
	/** Array BSON Type @internal */
	var BSON_DATA_ARRAY = 4;
	/** Binary BSON Type @internal */
	var BSON_DATA_BINARY = 5;
	/** Binary BSON Type @internal */
	var BSON_DATA_UNDEFINED = 6;
	/** ObjectId BSON Type @internal */
	var BSON_DATA_OID = 7;
	/** Boolean BSON Type @internal */
	var BSON_DATA_BOOLEAN = 8;
	/** Date BSON Type @internal */
	var BSON_DATA_DATE = 9;
	/** null BSON Type @internal */
	var BSON_DATA_NULL = 10;
	/** RegExp BSON Type @internal */
	var BSON_DATA_REGEXP = 11;
	/** Code BSON Type @internal */
	var BSON_DATA_DBPOINTER = 12;
	/** Code BSON Type @internal */
	var BSON_DATA_CODE = 13;
	/** Symbol BSON Type @internal */
	var BSON_DATA_SYMBOL = 14;
	/** Code with Scope BSON Type @internal */
	var BSON_DATA_CODE_W_SCOPE = 15;
	/** 32 bit Integer BSON Type @internal */
	var BSON_DATA_INT = 16;
	/** Timestamp BSON Type @internal */
	var BSON_DATA_TIMESTAMP = 17;
	/** Long BSON Type @internal */
	var BSON_DATA_LONG = 18;
	/** Decimal128 BSON Type @internal */
	var BSON_DATA_DECIMAL128 = 19;
	/** MinKey BSON Type @internal */
	var BSON_DATA_MIN_KEY = 0xff;
	/** MaxKey BSON Type @internal */
	var BSON_DATA_MAX_KEY = 0x7f;
	/** Binary Default Type @internal */
	var BSON_BINARY_SUBTYPE_DEFAULT = 0;
	/** Binary Function Type @internal */
	var BSON_BINARY_SUBTYPE_FUNCTION = 1;
	/** Binary Byte Array Type @internal */
	var BSON_BINARY_SUBTYPE_BYTE_ARRAY = 2;
	/** Binary Deprecated UUID Type @deprecated Please use BSON_BINARY_SUBTYPE_UUID_NEW @internal */
	var BSON_BINARY_SUBTYPE_UUID = 3;
	/** Binary UUID Type @internal */
	var BSON_BINARY_SUBTYPE_UUID_NEW = 4;
	/** Binary MD5 Type @internal */
	var BSON_BINARY_SUBTYPE_MD5 = 5;
	/** Encrypted BSON type @internal */
	var BSON_BINARY_SUBTYPE_ENCRYPTED = 6;
	/** Column BSON type @internal */
	var BSON_BINARY_SUBTYPE_COLUMN = 7;
	/** Binary User Defined Type @internal */
	var BSON_BINARY_SUBTYPE_USER_DEFINED = 128;

	/**
	 * A class representation of the BSON Binary type.
	 * @public
	 * @category BSONType
	 */
	var Binary = /** @class */ (function () {
	    /**
	     * Create a new Binary instance.
	     *
	     * This constructor can accept a string as its first argument. In this case,
	     * this string will be encoded using ISO-8859-1, **not** using UTF-8.
	     * This is almost certainly not what you want. Use `new Binary(Buffer.from(string))`
	     * instead to convert the string to a Buffer using UTF-8 first.
	     *
	     * @param buffer - a buffer object containing the binary data.
	     * @param subType - the option binary type.
	     */
	    function Binary(buffer, subType) {
	        if (!(this instanceof Binary))
	            return new Binary(buffer, subType);
	        if (!(buffer == null) &&
	            !(typeof buffer === 'string') &&
	            !ArrayBuffer.isView(buffer) &&
	            !(buffer instanceof ArrayBuffer) &&
	            !Array.isArray(buffer)) {
	            throw new BSONTypeError('Binary can only be constructed from string, Buffer, TypedArray, or Array<number>');
	        }
	        this.sub_type = subType !== null && subType !== void 0 ? subType : Binary.BSON_BINARY_SUBTYPE_DEFAULT;
	        if (buffer == null) {
	            // create an empty binary buffer
	            this.buffer = buffer_1.alloc(Binary.BUFFER_SIZE);
	            this.position = 0;
	        }
	        else {
	            if (typeof buffer === 'string') {
	                // string
	                this.buffer = buffer_1.from(buffer, 'binary');
	            }
	            else if (Array.isArray(buffer)) {
	                // number[]
	                this.buffer = buffer_1.from(buffer);
	            }
	            else {
	                // Buffer | TypedArray | ArrayBuffer
	                this.buffer = ensureBuffer(buffer);
	            }
	            this.position = this.buffer.byteLength;
	        }
	    }
	    /**
	     * Updates this binary with byte_value.
	     *
	     * @param byteValue - a single byte we wish to write.
	     */
	    Binary.prototype.put = function (byteValue) {
	        // If it's a string and a has more than one character throw an error
	        if (typeof byteValue === 'string' && byteValue.length !== 1) {
	            throw new BSONTypeError('only accepts single character String');
	        }
	        else if (typeof byteValue !== 'number' && byteValue.length !== 1)
	            throw new BSONTypeError('only accepts single character Uint8Array or Array');
	        // Decode the byte value once
	        var decodedByte;
	        if (typeof byteValue === 'string') {
	            decodedByte = byteValue.charCodeAt(0);
	        }
	        else if (typeof byteValue === 'number') {
	            decodedByte = byteValue;
	        }
	        else {
	            decodedByte = byteValue[0];
	        }
	        if (decodedByte < 0 || decodedByte > 255) {
	            throw new BSONTypeError('only accepts number in a valid unsigned byte range 0-255');
	        }
	        if (this.buffer.length > this.position) {
	            this.buffer[this.position++] = decodedByte;
	        }
	        else {
	            var buffer = buffer_1.alloc(Binary.BUFFER_SIZE + this.buffer.length);
	            // Combine the two buffers together
	            this.buffer.copy(buffer, 0, 0, this.buffer.length);
	            this.buffer = buffer;
	            this.buffer[this.position++] = decodedByte;
	        }
	    };
	    /**
	     * Writes a buffer or string to the binary.
	     *
	     * @param sequence - a string or buffer to be written to the Binary BSON object.
	     * @param offset - specify the binary of where to write the content.
	     */
	    Binary.prototype.write = function (sequence, offset) {
	        offset = typeof offset === 'number' ? offset : this.position;
	        // If the buffer is to small let's extend the buffer
	        if (this.buffer.length < offset + sequence.length) {
	            var buffer = buffer_1.alloc(this.buffer.length + sequence.length);
	            this.buffer.copy(buffer, 0, 0, this.buffer.length);
	            // Assign the new buffer
	            this.buffer = buffer;
	        }
	        if (ArrayBuffer.isView(sequence)) {
	            this.buffer.set(ensureBuffer(sequence), offset);
	            this.position =
	                offset + sequence.byteLength > this.position ? offset + sequence.length : this.position;
	        }
	        else if (typeof sequence === 'string') {
	            this.buffer.write(sequence, offset, sequence.length, 'binary');
	            this.position =
	                offset + sequence.length > this.position ? offset + sequence.length : this.position;
	        }
	    };
	    /**
	     * Reads **length** bytes starting at **position**.
	     *
	     * @param position - read from the given position in the Binary.
	     * @param length - the number of bytes to read.
	     */
	    Binary.prototype.read = function (position, length) {
	        length = length && length > 0 ? length : this.position;
	        // Let's return the data based on the type we have
	        return this.buffer.slice(position, position + length);
	    };
	    /**
	     * Returns the value of this binary as a string.
	     * @param asRaw - Will skip converting to a string
	     * @remarks
	     * This is handy when calling this function conditionally for some key value pairs and not others
	     */
	    Binary.prototype.value = function (asRaw) {
	        asRaw = !!asRaw;
	        // Optimize to serialize for the situation where the data == size of buffer
	        if (asRaw && this.buffer.length === this.position) {
	            return this.buffer;
	        }
	        // If it's a node.js buffer object
	        if (asRaw) {
	            return this.buffer.slice(0, this.position);
	        }
	        return this.buffer.toString('binary', 0, this.position);
	    };
	    /** the length of the binary sequence */
	    Binary.prototype.length = function () {
	        return this.position;
	    };
	    Binary.prototype.toJSON = function () {
	        return this.buffer.toString('base64');
	    };
	    Binary.prototype.toString = function (format) {
	        return this.buffer.toString(format);
	    };
	    /** @internal */
	    Binary.prototype.toExtendedJSON = function (options) {
	        options = options || {};
	        var base64String = this.buffer.toString('base64');
	        var subType = Number(this.sub_type).toString(16);
	        if (options.legacy) {
	            return {
	                $binary: base64String,
	                $type: subType.length === 1 ? '0' + subType : subType
	            };
	        }
	        return {
	            $binary: {
	                base64: base64String,
	                subType: subType.length === 1 ? '0' + subType : subType
	            }
	        };
	    };
	    Binary.prototype.toUUID = function () {
	        if (this.sub_type === Binary.SUBTYPE_UUID) {
	            return new UUID(this.buffer.slice(0, this.position));
	        }
	        throw new BSONError("Binary sub_type \"".concat(this.sub_type, "\" is not supported for converting to UUID. Only \"").concat(Binary.SUBTYPE_UUID, "\" is currently supported."));
	    };
	    /** @internal */
	    Binary.fromExtendedJSON = function (doc, options) {
	        options = options || {};
	        var data;
	        var type;
	        if ('$binary' in doc) {
	            if (options.legacy && typeof doc.$binary === 'string' && '$type' in doc) {
	                type = doc.$type ? parseInt(doc.$type, 16) : 0;
	                data = buffer_1.from(doc.$binary, 'base64');
	            }
	            else {
	                if (typeof doc.$binary !== 'string') {
	                    type = doc.$binary.subType ? parseInt(doc.$binary.subType, 16) : 0;
	                    data = buffer_1.from(doc.$binary.base64, 'base64');
	                }
	            }
	        }
	        else if ('$uuid' in doc) {
	            type = 4;
	            data = uuidHexStringToBuffer(doc.$uuid);
	        }
	        if (!data) {
	            throw new BSONTypeError("Unexpected Binary Extended JSON format ".concat(JSON.stringify(doc)));
	        }
	        return type === BSON_BINARY_SUBTYPE_UUID_NEW ? new UUID(data) : new Binary(data, type);
	    };
	    /** @internal */
	    Binary.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    Binary.prototype.inspect = function () {
	        var asBuffer = this.value(true);
	        return "new Binary(Buffer.from(\"".concat(asBuffer.toString('hex'), "\", \"hex\"), ").concat(this.sub_type, ")");
	    };
	    /**
	     * Binary default subtype
	     * @internal
	     */
	    Binary.BSON_BINARY_SUBTYPE_DEFAULT = 0;
	    /** Initial buffer default size */
	    Binary.BUFFER_SIZE = 256;
	    /** Default BSON type */
	    Binary.SUBTYPE_DEFAULT = 0;
	    /** Function BSON type */
	    Binary.SUBTYPE_FUNCTION = 1;
	    /** Byte Array BSON type */
	    Binary.SUBTYPE_BYTE_ARRAY = 2;
	    /** Deprecated UUID BSON type @deprecated Please use SUBTYPE_UUID */
	    Binary.SUBTYPE_UUID_OLD = 3;
	    /** UUID BSON type */
	    Binary.SUBTYPE_UUID = 4;
	    /** MD5 BSON type */
	    Binary.SUBTYPE_MD5 = 5;
	    /** Encrypted BSON type */
	    Binary.SUBTYPE_ENCRYPTED = 6;
	    /** Column BSON type */
	    Binary.SUBTYPE_COLUMN = 7;
	    /** User BSON type */
	    Binary.SUBTYPE_USER_DEFINED = 128;
	    return Binary;
	}());
	Object.defineProperty(Binary.prototype, '_bsontype', { value: 'Binary' });
	var UUID_BYTE_LENGTH = 16;
	/**
	 * A class representation of the BSON UUID type.
	 * @public
	 */
	var UUID = /** @class */ (function (_super) {
	    __extends(UUID, _super);
	    /**
	     * Create an UUID type
	     *
	     * @param input - Can be a 32 or 36 character hex string (dashes excluded/included) or a 16 byte binary Buffer.
	     */
	    function UUID(input) {
	        var _this = this;
	        var bytes;
	        var hexStr;
	        if (input == null) {
	            bytes = UUID.generate();
	        }
	        else if (input instanceof UUID) {
	            bytes = buffer_1.from(input.buffer);
	            hexStr = input.__id;
	        }
	        else if (ArrayBuffer.isView(input) && input.byteLength === UUID_BYTE_LENGTH) {
	            bytes = ensureBuffer(input);
	        }
	        else if (typeof input === 'string') {
	            bytes = uuidHexStringToBuffer(input);
	        }
	        else {
	            throw new BSONTypeError('Argument passed in UUID constructor must be a UUID, a 16 byte Buffer or a 32/36 character hex string (dashes excluded/included, format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx).');
	        }
	        _this = _super.call(this, bytes, BSON_BINARY_SUBTYPE_UUID_NEW) || this;
	        _this.__id = hexStr;
	        return _this;
	    }
	    Object.defineProperty(UUID.prototype, "id", {
	        /**
	         * The UUID bytes
	         * @readonly
	         */
	        get: function () {
	            return this.buffer;
	        },
	        set: function (value) {
	            this.buffer = value;
	            if (UUID.cacheHexString) {
	                this.__id = bufferToUuidHexString(value);
	            }
	        },
	        enumerable: false,
	        configurable: true
	    });
	    /**
	     * Returns the UUID id as a 32 or 36 character hex string representation, excluding/including dashes (defaults to 36 character dash separated)
	     * @param includeDashes - should the string exclude dash-separators.
	     * */
	    UUID.prototype.toHexString = function (includeDashes) {
	        if (includeDashes === void 0) { includeDashes = true; }
	        if (UUID.cacheHexString && this.__id) {
	            return this.__id;
	        }
	        var uuidHexString = bufferToUuidHexString(this.id, includeDashes);
	        if (UUID.cacheHexString) {
	            this.__id = uuidHexString;
	        }
	        return uuidHexString;
	    };
	    /**
	     * Converts the id into a 36 character (dashes included) hex string, unless a encoding is specified.
	     */
	    UUID.prototype.toString = function (encoding) {
	        return encoding ? this.id.toString(encoding) : this.toHexString();
	    };
	    /**
	     * Converts the id into its JSON string representation.
	     * A 36 character (dashes included) hex string in the format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
	     */
	    UUID.prototype.toJSON = function () {
	        return this.toHexString();
	    };
	    /**
	     * Compares the equality of this UUID with `otherID`.
	     *
	     * @param otherId - UUID instance to compare against.
	     */
	    UUID.prototype.equals = function (otherId) {
	        if (!otherId) {
	            return false;
	        }
	        if (otherId instanceof UUID) {
	            return otherId.id.equals(this.id);
	        }
	        try {
	            return new UUID(otherId).id.equals(this.id);
	        }
	        catch (_a) {
	            return false;
	        }
	    };
	    /**
	     * Creates a Binary instance from the current UUID.
	     */
	    UUID.prototype.toBinary = function () {
	        return new Binary(this.id, Binary.SUBTYPE_UUID);
	    };
	    /**
	     * Generates a populated buffer containing a v4 uuid
	     */
	    UUID.generate = function () {
	        var bytes = randomBytes(UUID_BYTE_LENGTH);
	        // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
	        // Kindly borrowed from https://github.com/uuidjs/uuid/blob/master/src/v4.js
	        bytes[6] = (bytes[6] & 0x0f) | 0x40;
	        bytes[8] = (bytes[8] & 0x3f) | 0x80;
	        return buffer_1.from(bytes);
	    };
	    /**
	     * Checks if a value is a valid bson UUID
	     * @param input - UUID, string or Buffer to validate.
	     */
	    UUID.isValid = function (input) {
	        if (!input) {
	            return false;
	        }
	        if (input instanceof UUID) {
	            return true;
	        }
	        if (typeof input === 'string') {
	            return uuidValidateString(input);
	        }
	        if (isUint8Array(input)) {
	            // check for length & uuid version (https://tools.ietf.org/html/rfc4122#section-4.1.3)
	            if (input.length !== UUID_BYTE_LENGTH) {
	                return false;
	            }
	            return (input[6] & 0xf0) === 0x40 && (input[8] & 0x80) === 0x80;
	        }
	        return false;
	    };
	    /**
	     * Creates an UUID from a hex string representation of an UUID.
	     * @param hexString - 32 or 36 character hex string (dashes excluded/included).
	     */
	    UUID.createFromHexString = function (hexString) {
	        var buffer = uuidHexStringToBuffer(hexString);
	        return new UUID(buffer);
	    };
	    /**
	     * Converts to a string representation of this Id.
	     *
	     * @returns return the 36 character hex string representation.
	     * @internal
	     */
	    UUID.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    UUID.prototype.inspect = function () {
	        return "new UUID(\"".concat(this.toHexString(), "\")");
	    };
	    return UUID;
	}(Binary));

	/**
	 * A class representation of the BSON Code type.
	 * @public
	 * @category BSONType
	 */
	var Code = /** @class */ (function () {
	    /**
	     * @param code - a string or function.
	     * @param scope - an optional scope for the function.
	     */
	    function Code(code, scope) {
	        if (!(this instanceof Code))
	            return new Code(code, scope);
	        this.code = code;
	        this.scope = scope;
	    }
	    Code.prototype.toJSON = function () {
	        return { code: this.code, scope: this.scope };
	    };
	    /** @internal */
	    Code.prototype.toExtendedJSON = function () {
	        if (this.scope) {
	            return { $code: this.code, $scope: this.scope };
	        }
	        return { $code: this.code };
	    };
	    /** @internal */
	    Code.fromExtendedJSON = function (doc) {
	        return new Code(doc.$code, doc.$scope);
	    };
	    /** @internal */
	    Code.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    Code.prototype.inspect = function () {
	        var codeJson = this.toJSON();
	        return "new Code(\"".concat(String(codeJson.code), "\"").concat(codeJson.scope ? ", ".concat(JSON.stringify(codeJson.scope)) : '', ")");
	    };
	    return Code;
	}());
	Object.defineProperty(Code.prototype, '_bsontype', { value: 'Code' });

	/** @internal */
	function isDBRefLike(value) {
	    return (isObjectLike(value) &&
	        value.$id != null &&
	        typeof value.$ref === 'string' &&
	        (value.$db == null || typeof value.$db === 'string'));
	}
	/**
	 * A class representation of the BSON DBRef type.
	 * @public
	 * @category BSONType
	 */
	var DBRef = /** @class */ (function () {
	    /**
	     * @param collection - the collection name.
	     * @param oid - the reference ObjectId.
	     * @param db - optional db name, if omitted the reference is local to the current db.
	     */
	    function DBRef(collection, oid, db, fields) {
	        if (!(this instanceof DBRef))
	            return new DBRef(collection, oid, db, fields);
	        // check if namespace has been provided
	        var parts = collection.split('.');
	        if (parts.length === 2) {
	            db = parts.shift();
	            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
	            collection = parts.shift();
	        }
	        this.collection = collection;
	        this.oid = oid;
	        this.db = db;
	        this.fields = fields || {};
	    }
	    Object.defineProperty(DBRef.prototype, "namespace", {
	        // Property provided for compatibility with the 1.x parser
	        // the 1.x parser used a "namespace" property, while 4.x uses "collection"
	        /** @internal */
	        get: function () {
	            return this.collection;
	        },
	        set: function (value) {
	            this.collection = value;
	        },
	        enumerable: false,
	        configurable: true
	    });
	    DBRef.prototype.toJSON = function () {
	        var o = Object.assign({
	            $ref: this.collection,
	            $id: this.oid
	        }, this.fields);
	        if (this.db != null)
	            o.$db = this.db;
	        return o;
	    };
	    /** @internal */
	    DBRef.prototype.toExtendedJSON = function (options) {
	        options = options || {};
	        var o = {
	            $ref: this.collection,
	            $id: this.oid
	        };
	        if (options.legacy) {
	            return o;
	        }
	        if (this.db)
	            o.$db = this.db;
	        o = Object.assign(o, this.fields);
	        return o;
	    };
	    /** @internal */
	    DBRef.fromExtendedJSON = function (doc) {
	        var copy = Object.assign({}, doc);
	        delete copy.$ref;
	        delete copy.$id;
	        delete copy.$db;
	        return new DBRef(doc.$ref, doc.$id, doc.$db, copy);
	    };
	    /** @internal */
	    DBRef.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    DBRef.prototype.inspect = function () {
	        // NOTE: if OID is an ObjectId class it will just print the oid string.
	        var oid = this.oid === undefined || this.oid.toString === undefined ? this.oid : this.oid.toString();
	        return "new DBRef(\"".concat(this.namespace, "\", new ObjectId(\"").concat(String(oid), "\")").concat(this.db ? ", \"".concat(this.db, "\"") : '', ")");
	    };
	    return DBRef;
	}());
	Object.defineProperty(DBRef.prototype, '_bsontype', { value: 'DBRef' });

	/**
	 * wasm optimizations, to do native i64 multiplication and divide
	 */
	var wasm = undefined;
	try {
	    wasm = new WebAssembly.Instance(new WebAssembly.Module(
	    // prettier-ignore
	    new Uint8Array([0, 97, 115, 109, 1, 0, 0, 0, 1, 13, 2, 96, 0, 1, 127, 96, 4, 127, 127, 127, 127, 1, 127, 3, 7, 6, 0, 1, 1, 1, 1, 1, 6, 6, 1, 127, 1, 65, 0, 11, 7, 50, 6, 3, 109, 117, 108, 0, 1, 5, 100, 105, 118, 95, 115, 0, 2, 5, 100, 105, 118, 95, 117, 0, 3, 5, 114, 101, 109, 95, 115, 0, 4, 5, 114, 101, 109, 95, 117, 0, 5, 8, 103, 101, 116, 95, 104, 105, 103, 104, 0, 0, 10, 191, 1, 6, 4, 0, 35, 0, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 126, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 127, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 128, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 129, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 130, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11])), {}).exports;
	}
	catch (_a) {
	    // no wasm support
	}
	var TWO_PWR_16_DBL = 1 << 16;
	var TWO_PWR_24_DBL = 1 << 24;
	var TWO_PWR_32_DBL = TWO_PWR_16_DBL * TWO_PWR_16_DBL;
	var TWO_PWR_64_DBL = TWO_PWR_32_DBL * TWO_PWR_32_DBL;
	var TWO_PWR_63_DBL = TWO_PWR_64_DBL / 2;
	/** A cache of the Long representations of small integer values. */
	var INT_CACHE = {};
	/** A cache of the Long representations of small unsigned integer values. */
	var UINT_CACHE = {};
	/**
	 * A class representing a 64-bit integer
	 * @public
	 * @category BSONType
	 * @remarks
	 * The internal representation of a long is the two given signed, 32-bit values.
	 * We use 32-bit pieces because these are the size of integers on which
	 * Javascript performs bit-operations.  For operations like addition and
	 * multiplication, we split each number into 16 bit pieces, which can easily be
	 * multiplied within Javascript's floating-point representation without overflow
	 * or change in sign.
	 * In the algorithms below, we frequently reduce the negative case to the
	 * positive case by negating the input(s) and then post-processing the result.
	 * Note that we must ALWAYS check specially whether those values are MIN_VALUE
	 * (-2^63) because -MIN_VALUE == MIN_VALUE (since 2^63 cannot be represented as
	 * a positive number, it overflows back into a negative).  Not handling this
	 * case would often result in infinite recursion.
	 * Common constant values ZERO, ONE, NEG_ONE, etc. are found as static properties on this class.
	 */
	var Long = /** @class */ (function () {
	    /**
	     * Constructs a 64 bit two's-complement integer, given its low and high 32 bit values as *signed* integers.
	     *  See the from* functions below for more convenient ways of constructing Longs.
	     *
	     * Acceptable signatures are:
	     * - Long(low, high, unsigned?)
	     * - Long(bigint, unsigned?)
	     * - Long(string, unsigned?)
	     *
	     * @param low - The low (signed) 32 bits of the long
	     * @param high - The high (signed) 32 bits of the long
	     * @param unsigned - Whether unsigned or not, defaults to signed
	     */
	    function Long(low, high, unsigned) {
	        if (low === void 0) { low = 0; }
	        if (!(this instanceof Long))
	            return new Long(low, high, unsigned);
	        if (typeof low === 'bigint') {
	            Object.assign(this, Long.fromBigInt(low, !!high));
	        }
	        else if (typeof low === 'string') {
	            Object.assign(this, Long.fromString(low, !!high));
	        }
	        else {
	            this.low = low | 0;
	            this.high = high | 0;
	            this.unsigned = !!unsigned;
	        }
	        Object.defineProperty(this, '__isLong__', {
	            value: true,
	            configurable: false,
	            writable: false,
	            enumerable: false
	        });
	    }
	    /**
	     * Returns a Long representing the 64 bit integer that comes by concatenating the given low and high bits.
	     * Each is assumed to use 32 bits.
	     * @param lowBits - The low 32 bits
	     * @param highBits - The high 32 bits
	     * @param unsigned - Whether unsigned or not, defaults to signed
	     * @returns The corresponding Long value
	     */
	    Long.fromBits = function (lowBits, highBits, unsigned) {
	        return new Long(lowBits, highBits, unsigned);
	    };
	    /**
	     * Returns a Long representing the given 32 bit integer value.
	     * @param value - The 32 bit integer in question
	     * @param unsigned - Whether unsigned or not, defaults to signed
	     * @returns The corresponding Long value
	     */
	    Long.fromInt = function (value, unsigned) {
	        var obj, cachedObj, cache;
	        if (unsigned) {
	            value >>>= 0;
	            if ((cache = 0 <= value && value < 256)) {
	                cachedObj = UINT_CACHE[value];
	                if (cachedObj)
	                    return cachedObj;
	            }
	            obj = Long.fromBits(value, (value | 0) < 0 ? -1 : 0, true);
	            if (cache)
	                UINT_CACHE[value] = obj;
	            return obj;
	        }
	        else {
	            value |= 0;
	            if ((cache = -128 <= value && value < 128)) {
	                cachedObj = INT_CACHE[value];
	                if (cachedObj)
	                    return cachedObj;
	            }
	            obj = Long.fromBits(value, value < 0 ? -1 : 0, false);
	            if (cache)
	                INT_CACHE[value] = obj;
	            return obj;
	        }
	    };
	    /**
	     * Returns a Long representing the given value, provided that it is a finite number. Otherwise, zero is returned.
	     * @param value - The number in question
	     * @param unsigned - Whether unsigned or not, defaults to signed
	     * @returns The corresponding Long value
	     */
	    Long.fromNumber = function (value, unsigned) {
	        if (isNaN(value))
	            return unsigned ? Long.UZERO : Long.ZERO;
	        if (unsigned) {
	            if (value < 0)
	                return Long.UZERO;
	            if (value >= TWO_PWR_64_DBL)
	                return Long.MAX_UNSIGNED_VALUE;
	        }
	        else {
	            if (value <= -TWO_PWR_63_DBL)
	                return Long.MIN_VALUE;
	            if (value + 1 >= TWO_PWR_63_DBL)
	                return Long.MAX_VALUE;
	        }
	        if (value < 0)
	            return Long.fromNumber(-value, unsigned).neg();
	        return Long.fromBits(value % TWO_PWR_32_DBL | 0, (value / TWO_PWR_32_DBL) | 0, unsigned);
	    };
	    /**
	     * Returns a Long representing the given value, provided that it is a finite number. Otherwise, zero is returned.
	     * @param value - The number in question
	     * @param unsigned - Whether unsigned or not, defaults to signed
	     * @returns The corresponding Long value
	     */
	    Long.fromBigInt = function (value, unsigned) {
	        return Long.fromString(value.toString(), unsigned);
	    };
	    /**
	     * Returns a Long representation of the given string, written using the specified radix.
	     * @param str - The textual representation of the Long
	     * @param unsigned - Whether unsigned or not, defaults to signed
	     * @param radix - The radix in which the text is written (2-36), defaults to 10
	     * @returns The corresponding Long value
	     */
	    Long.fromString = function (str, unsigned, radix) {
	        if (str.length === 0)
	            throw Error('empty string');
	        if (str === 'NaN' || str === 'Infinity' || str === '+Infinity' || str === '-Infinity')
	            return Long.ZERO;
	        if (typeof unsigned === 'number') {
	            // For goog.math.long compatibility
	            (radix = unsigned), (unsigned = false);
	        }
	        else {
	            unsigned = !!unsigned;
	        }
	        radix = radix || 10;
	        if (radix < 2 || 36 < radix)
	            throw RangeError('radix');
	        var p;
	        if ((p = str.indexOf('-')) > 0)
	            throw Error('interior hyphen');
	        else if (p === 0) {
	            return Long.fromString(str.substring(1), unsigned, radix).neg();
	        }
	        // Do several (8) digits each time through the loop, so as to
	        // minimize the calls to the very expensive emulated div.
	        var radixToPower = Long.fromNumber(Math.pow(radix, 8));
	        var result = Long.ZERO;
	        for (var i = 0; i < str.length; i += 8) {
	            var size = Math.min(8, str.length - i), value = parseInt(str.substring(i, i + size), radix);
	            if (size < 8) {
	                var power = Long.fromNumber(Math.pow(radix, size));
	                result = result.mul(power).add(Long.fromNumber(value));
	            }
	            else {
	                result = result.mul(radixToPower);
	                result = result.add(Long.fromNumber(value));
	            }
	        }
	        result.unsigned = unsigned;
	        return result;
	    };
	    /**
	     * Creates a Long from its byte representation.
	     * @param bytes - Byte representation
	     * @param unsigned - Whether unsigned or not, defaults to signed
	     * @param le - Whether little or big endian, defaults to big endian
	     * @returns The corresponding Long value
	     */
	    Long.fromBytes = function (bytes, unsigned, le) {
	        return le ? Long.fromBytesLE(bytes, unsigned) : Long.fromBytesBE(bytes, unsigned);
	    };
	    /**
	     * Creates a Long from its little endian byte representation.
	     * @param bytes - Little endian byte representation
	     * @param unsigned - Whether unsigned or not, defaults to signed
	     * @returns The corresponding Long value
	     */
	    Long.fromBytesLE = function (bytes, unsigned) {
	        return new Long(bytes[0] | (bytes[1] << 8) | (bytes[2] << 16) | (bytes[3] << 24), bytes[4] | (bytes[5] << 8) | (bytes[6] << 16) | (bytes[7] << 24), unsigned);
	    };
	    /**
	     * Creates a Long from its big endian byte representation.
	     * @param bytes - Big endian byte representation
	     * @param unsigned - Whether unsigned or not, defaults to signed
	     * @returns The corresponding Long value
	     */
	    Long.fromBytesBE = function (bytes, unsigned) {
	        return new Long((bytes[4] << 24) | (bytes[5] << 16) | (bytes[6] << 8) | bytes[7], (bytes[0] << 24) | (bytes[1] << 16) | (bytes[2] << 8) | bytes[3], unsigned);
	    };
	    /**
	     * Tests if the specified object is a Long.
	     */
	    Long.isLong = function (value) {
	        return isObjectLike(value) && value['__isLong__'] === true;
	    };
	    /**
	     * Converts the specified value to a Long.
	     * @param unsigned - Whether unsigned or not, defaults to signed
	     */
	    Long.fromValue = function (val, unsigned) {
	        if (typeof val === 'number')
	            return Long.fromNumber(val, unsigned);
	        if (typeof val === 'string')
	            return Long.fromString(val, unsigned);
	        // Throws for non-objects, converts non-instanceof Long:
	        return Long.fromBits(val.low, val.high, typeof unsigned === 'boolean' ? unsigned : val.unsigned);
	    };
	    /** Returns the sum of this and the specified Long. */
	    Long.prototype.add = function (addend) {
	        if (!Long.isLong(addend))
	            addend = Long.fromValue(addend);
	        // Divide each number into 4 chunks of 16 bits, and then sum the chunks.
	        var a48 = this.high >>> 16;
	        var a32 = this.high & 0xffff;
	        var a16 = this.low >>> 16;
	        var a00 = this.low & 0xffff;
	        var b48 = addend.high >>> 16;
	        var b32 = addend.high & 0xffff;
	        var b16 = addend.low >>> 16;
	        var b00 = addend.low & 0xffff;
	        var c48 = 0, c32 = 0, c16 = 0, c00 = 0;
	        c00 += a00 + b00;
	        c16 += c00 >>> 16;
	        c00 &= 0xffff;
	        c16 += a16 + b16;
	        c32 += c16 >>> 16;
	        c16 &= 0xffff;
	        c32 += a32 + b32;
	        c48 += c32 >>> 16;
	        c32 &= 0xffff;
	        c48 += a48 + b48;
	        c48 &= 0xffff;
	        return Long.fromBits((c16 << 16) | c00, (c48 << 16) | c32, this.unsigned);
	    };
	    /**
	     * Returns the sum of this and the specified Long.
	     * @returns Sum
	     */
	    Long.prototype.and = function (other) {
	        if (!Long.isLong(other))
	            other = Long.fromValue(other);
	        return Long.fromBits(this.low & other.low, this.high & other.high, this.unsigned);
	    };
	    /**
	     * Compares this Long's value with the specified's.
	     * @returns 0 if they are the same, 1 if the this is greater and -1 if the given one is greater
	     */
	    Long.prototype.compare = function (other) {
	        if (!Long.isLong(other))
	            other = Long.fromValue(other);
	        if (this.eq(other))
	            return 0;
	        var thisNeg = this.isNegative(), otherNeg = other.isNegative();
	        if (thisNeg && !otherNeg)
	            return -1;
	        if (!thisNeg && otherNeg)
	            return 1;
	        // At this point the sign bits are the same
	        if (!this.unsigned)
	            return this.sub(other).isNegative() ? -1 : 1;
	        // Both are positive if at least one is unsigned
	        return other.high >>> 0 > this.high >>> 0 ||
	            (other.high === this.high && other.low >>> 0 > this.low >>> 0)
	            ? -1
	            : 1;
	    };
	    /** This is an alias of {@link Long.compare} */
	    Long.prototype.comp = function (other) {
	        return this.compare(other);
	    };
	    /**
	     * Returns this Long divided by the specified. The result is signed if this Long is signed or unsigned if this Long is unsigned.
	     * @returns Quotient
	     */
	    Long.prototype.divide = function (divisor) {
	        if (!Long.isLong(divisor))
	            divisor = Long.fromValue(divisor);
	        if (divisor.isZero())
	            throw Error('division by zero');
	        // use wasm support if present
	        if (wasm) {
	            // guard against signed division overflow: the largest
	            // negative number / -1 would be 1 larger than the largest
	            // positive number, due to two's complement.
	            if (!this.unsigned &&
	                this.high === -0x80000000 &&
	                divisor.low === -1 &&
	                divisor.high === -1) {
	                // be consistent with non-wasm code path
	                return this;
	            }
	            var low = (this.unsigned ? wasm.div_u : wasm.div_s)(this.low, this.high, divisor.low, divisor.high);
	            return Long.fromBits(low, wasm.get_high(), this.unsigned);
	        }
	        if (this.isZero())
	            return this.unsigned ? Long.UZERO : Long.ZERO;
	        var approx, rem, res;
	        if (!this.unsigned) {
	            // This section is only relevant for signed longs and is derived from the
	            // closure library as a whole.
	            if (this.eq(Long.MIN_VALUE)) {
	                if (divisor.eq(Long.ONE) || divisor.eq(Long.NEG_ONE))
	                    return Long.MIN_VALUE;
	                // recall that -MIN_VALUE == MIN_VALUE
	                else if (divisor.eq(Long.MIN_VALUE))
	                    return Long.ONE;
	                else {
	                    // At this point, we have |other| >= 2, so |this/other| < |MIN_VALUE|.
	                    var halfThis = this.shr(1);
	                    approx = halfThis.div(divisor).shl(1);
	                    if (approx.eq(Long.ZERO)) {
	                        return divisor.isNegative() ? Long.ONE : Long.NEG_ONE;
	                    }
	                    else {
	                        rem = this.sub(divisor.mul(approx));
	                        res = approx.add(rem.div(divisor));
	                        return res;
	                    }
	                }
	            }
	            else if (divisor.eq(Long.MIN_VALUE))
	                return this.unsigned ? Long.UZERO : Long.ZERO;
	            if (this.isNegative()) {
	                if (divisor.isNegative())
	                    return this.neg().div(divisor.neg());
	                return this.neg().div(divisor).neg();
	            }
	            else if (divisor.isNegative())
	                return this.div(divisor.neg()).neg();
	            res = Long.ZERO;
	        }
	        else {
	            // The algorithm below has not been made for unsigned longs. It's therefore
	            // required to take special care of the MSB prior to running it.
	            if (!divisor.unsigned)
	                divisor = divisor.toUnsigned();
	            if (divisor.gt(this))
	                return Long.UZERO;
	            if (divisor.gt(this.shru(1)))
	                // 15 >>> 1 = 7 ; with divisor = 8 ; true
	                return Long.UONE;
	            res = Long.UZERO;
	        }
	        // Repeat the following until the remainder is less than other:  find a
	        // floating-point that approximates remainder / other *from below*, add this
	        // into the result, and subtract it from the remainder.  It is critical that
	        // the approximate value is less than or equal to the real value so that the
	        // remainder never becomes negative.
	        // eslint-disable-next-line @typescript-eslint/no-this-alias
	        rem = this;
	        while (rem.gte(divisor)) {
	            // Approximate the result of division. This may be a little greater or
	            // smaller than the actual value.
	            approx = Math.max(1, Math.floor(rem.toNumber() / divisor.toNumber()));
	            // We will tweak the approximate result by changing it in the 48-th digit or
	            // the smallest non-fractional digit, whichever is larger.
	            var log2 = Math.ceil(Math.log(approx) / Math.LN2);
	            var delta = log2 <= 48 ? 1 : Math.pow(2, log2 - 48);
	            // Decrease the approximation until it is smaller than the remainder.  Note
	            // that if it is too large, the product overflows and is negative.
	            var approxRes = Long.fromNumber(approx);
	            var approxRem = approxRes.mul(divisor);
	            while (approxRem.isNegative() || approxRem.gt(rem)) {
	                approx -= delta;
	                approxRes = Long.fromNumber(approx, this.unsigned);
	                approxRem = approxRes.mul(divisor);
	            }
	            // We know the answer can't be zero... and actually, zero would cause
	            // infinite recursion since we would make no progress.
	            if (approxRes.isZero())
	                approxRes = Long.ONE;
	            res = res.add(approxRes);
	            rem = rem.sub(approxRem);
	        }
	        return res;
	    };
	    /**This is an alias of {@link Long.divide} */
	    Long.prototype.div = function (divisor) {
	        return this.divide(divisor);
	    };
	    /**
	     * Tests if this Long's value equals the specified's.
	     * @param other - Other value
	     */
	    Long.prototype.equals = function (other) {
	        if (!Long.isLong(other))
	            other = Long.fromValue(other);
	        if (this.unsigned !== other.unsigned && this.high >>> 31 === 1 && other.high >>> 31 === 1)
	            return false;
	        return this.high === other.high && this.low === other.low;
	    };
	    /** This is an alias of {@link Long.equals} */
	    Long.prototype.eq = function (other) {
	        return this.equals(other);
	    };
	    /** Gets the high 32 bits as a signed integer. */
	    Long.prototype.getHighBits = function () {
	        return this.high;
	    };
	    /** Gets the high 32 bits as an unsigned integer. */
	    Long.prototype.getHighBitsUnsigned = function () {
	        return this.high >>> 0;
	    };
	    /** Gets the low 32 bits as a signed integer. */
	    Long.prototype.getLowBits = function () {
	        return this.low;
	    };
	    /** Gets the low 32 bits as an unsigned integer. */
	    Long.prototype.getLowBitsUnsigned = function () {
	        return this.low >>> 0;
	    };
	    /** Gets the number of bits needed to represent the absolute value of this Long. */
	    Long.prototype.getNumBitsAbs = function () {
	        if (this.isNegative()) {
	            // Unsigned Longs are never negative
	            return this.eq(Long.MIN_VALUE) ? 64 : this.neg().getNumBitsAbs();
	        }
	        var val = this.high !== 0 ? this.high : this.low;
	        var bit;
	        for (bit = 31; bit > 0; bit--)
	            if ((val & (1 << bit)) !== 0)
	                break;
	        return this.high !== 0 ? bit + 33 : bit + 1;
	    };
	    /** Tests if this Long's value is greater than the specified's. */
	    Long.prototype.greaterThan = function (other) {
	        return this.comp(other) > 0;
	    };
	    /** This is an alias of {@link Long.greaterThan} */
	    Long.prototype.gt = function (other) {
	        return this.greaterThan(other);
	    };
	    /** Tests if this Long's value is greater than or equal the specified's. */
	    Long.prototype.greaterThanOrEqual = function (other) {
	        return this.comp(other) >= 0;
	    };
	    /** This is an alias of {@link Long.greaterThanOrEqual} */
	    Long.prototype.gte = function (other) {
	        return this.greaterThanOrEqual(other);
	    };
	    /** This is an alias of {@link Long.greaterThanOrEqual} */
	    Long.prototype.ge = function (other) {
	        return this.greaterThanOrEqual(other);
	    };
	    /** Tests if this Long's value is even. */
	    Long.prototype.isEven = function () {
	        return (this.low & 1) === 0;
	    };
	    /** Tests if this Long's value is negative. */
	    Long.prototype.isNegative = function () {
	        return !this.unsigned && this.high < 0;
	    };
	    /** Tests if this Long's value is odd. */
	    Long.prototype.isOdd = function () {
	        return (this.low & 1) === 1;
	    };
	    /** Tests if this Long's value is positive. */
	    Long.prototype.isPositive = function () {
	        return this.unsigned || this.high >= 0;
	    };
	    /** Tests if this Long's value equals zero. */
	    Long.prototype.isZero = function () {
	        return this.high === 0 && this.low === 0;
	    };
	    /** Tests if this Long's value is less than the specified's. */
	    Long.prototype.lessThan = function (other) {
	        return this.comp(other) < 0;
	    };
	    /** This is an alias of {@link Long#lessThan}. */
	    Long.prototype.lt = function (other) {
	        return this.lessThan(other);
	    };
	    /** Tests if this Long's value is less than or equal the specified's. */
	    Long.prototype.lessThanOrEqual = function (other) {
	        return this.comp(other) <= 0;
	    };
	    /** This is an alias of {@link Long.lessThanOrEqual} */
	    Long.prototype.lte = function (other) {
	        return this.lessThanOrEqual(other);
	    };
	    /** Returns this Long modulo the specified. */
	    Long.prototype.modulo = function (divisor) {
	        if (!Long.isLong(divisor))
	            divisor = Long.fromValue(divisor);
	        // use wasm support if present
	        if (wasm) {
	            var low = (this.unsigned ? wasm.rem_u : wasm.rem_s)(this.low, this.high, divisor.low, divisor.high);
	            return Long.fromBits(low, wasm.get_high(), this.unsigned);
	        }
	        return this.sub(this.div(divisor).mul(divisor));
	    };
	    /** This is an alias of {@link Long.modulo} */
	    Long.prototype.mod = function (divisor) {
	        return this.modulo(divisor);
	    };
	    /** This is an alias of {@link Long.modulo} */
	    Long.prototype.rem = function (divisor) {
	        return this.modulo(divisor);
	    };
	    /**
	     * Returns the product of this and the specified Long.
	     * @param multiplier - Multiplier
	     * @returns Product
	     */
	    Long.prototype.multiply = function (multiplier) {
	        if (this.isZero())
	            return Long.ZERO;
	        if (!Long.isLong(multiplier))
	            multiplier = Long.fromValue(multiplier);
	        // use wasm support if present
	        if (wasm) {
	            var low = wasm.mul(this.low, this.high, multiplier.low, multiplier.high);
	            return Long.fromBits(low, wasm.get_high(), this.unsigned);
	        }
	        if (multiplier.isZero())
	            return Long.ZERO;
	        if (this.eq(Long.MIN_VALUE))
	            return multiplier.isOdd() ? Long.MIN_VALUE : Long.ZERO;
	        if (multiplier.eq(Long.MIN_VALUE))
	            return this.isOdd() ? Long.MIN_VALUE : Long.ZERO;
	        if (this.isNegative()) {
	            if (multiplier.isNegative())
	                return this.neg().mul(multiplier.neg());
	            else
	                return this.neg().mul(multiplier).neg();
	        }
	        else if (multiplier.isNegative())
	            return this.mul(multiplier.neg()).neg();
	        // If both longs are small, use float multiplication
	        if (this.lt(Long.TWO_PWR_24) && multiplier.lt(Long.TWO_PWR_24))
	            return Long.fromNumber(this.toNumber() * multiplier.toNumber(), this.unsigned);
	        // Divide each long into 4 chunks of 16 bits, and then add up 4x4 products.
	        // We can skip products that would overflow.
	        var a48 = this.high >>> 16;
	        var a32 = this.high & 0xffff;
	        var a16 = this.low >>> 16;
	        var a00 = this.low & 0xffff;
	        var b48 = multiplier.high >>> 16;
	        var b32 = multiplier.high & 0xffff;
	        var b16 = multiplier.low >>> 16;
	        var b00 = multiplier.low & 0xffff;
	        var c48 = 0, c32 = 0, c16 = 0, c00 = 0;
	        c00 += a00 * b00;
	        c16 += c00 >>> 16;
	        c00 &= 0xffff;
	        c16 += a16 * b00;
	        c32 += c16 >>> 16;
	        c16 &= 0xffff;
	        c16 += a00 * b16;
	        c32 += c16 >>> 16;
	        c16 &= 0xffff;
	        c32 += a32 * b00;
	        c48 += c32 >>> 16;
	        c32 &= 0xffff;
	        c32 += a16 * b16;
	        c48 += c32 >>> 16;
	        c32 &= 0xffff;
	        c32 += a00 * b32;
	        c48 += c32 >>> 16;
	        c32 &= 0xffff;
	        c48 += a48 * b00 + a32 * b16 + a16 * b32 + a00 * b48;
	        c48 &= 0xffff;
	        return Long.fromBits((c16 << 16) | c00, (c48 << 16) | c32, this.unsigned);
	    };
	    /** This is an alias of {@link Long.multiply} */
	    Long.prototype.mul = function (multiplier) {
	        return this.multiply(multiplier);
	    };
	    /** Returns the Negation of this Long's value. */
	    Long.prototype.negate = function () {
	        if (!this.unsigned && this.eq(Long.MIN_VALUE))
	            return Long.MIN_VALUE;
	        return this.not().add(Long.ONE);
	    };
	    /** This is an alias of {@link Long.negate} */
	    Long.prototype.neg = function () {
	        return this.negate();
	    };
	    /** Returns the bitwise NOT of this Long. */
	    Long.prototype.not = function () {
	        return Long.fromBits(~this.low, ~this.high, this.unsigned);
	    };
	    /** Tests if this Long's value differs from the specified's. */
	    Long.prototype.notEquals = function (other) {
	        return !this.equals(other);
	    };
	    /** This is an alias of {@link Long.notEquals} */
	    Long.prototype.neq = function (other) {
	        return this.notEquals(other);
	    };
	    /** This is an alias of {@link Long.notEquals} */
	    Long.prototype.ne = function (other) {
	        return this.notEquals(other);
	    };
	    /**
	     * Returns the bitwise OR of this Long and the specified.
	     */
	    Long.prototype.or = function (other) {
	        if (!Long.isLong(other))
	            other = Long.fromValue(other);
	        return Long.fromBits(this.low | other.low, this.high | other.high, this.unsigned);
	    };
	    /**
	     * Returns this Long with bits shifted to the left by the given amount.
	     * @param numBits - Number of bits
	     * @returns Shifted Long
	     */
	    Long.prototype.shiftLeft = function (numBits) {
	        if (Long.isLong(numBits))
	            numBits = numBits.toInt();
	        if ((numBits &= 63) === 0)
	            return this;
	        else if (numBits < 32)
	            return Long.fromBits(this.low << numBits, (this.high << numBits) | (this.low >>> (32 - numBits)), this.unsigned);
	        else
	            return Long.fromBits(0, this.low << (numBits - 32), this.unsigned);
	    };
	    /** This is an alias of {@link Long.shiftLeft} */
	    Long.prototype.shl = function (numBits) {
	        return this.shiftLeft(numBits);
	    };
	    /**
	     * Returns this Long with bits arithmetically shifted to the right by the given amount.
	     * @param numBits - Number of bits
	     * @returns Shifted Long
	     */
	    Long.prototype.shiftRight = function (numBits) {
	        if (Long.isLong(numBits))
	            numBits = numBits.toInt();
	        if ((numBits &= 63) === 0)
	            return this;
	        else if (numBits < 32)
	            return Long.fromBits((this.low >>> numBits) | (this.high << (32 - numBits)), this.high >> numBits, this.unsigned);
	        else
	            return Long.fromBits(this.high >> (numBits - 32), this.high >= 0 ? 0 : -1, this.unsigned);
	    };
	    /** This is an alias of {@link Long.shiftRight} */
	    Long.prototype.shr = function (numBits) {
	        return this.shiftRight(numBits);
	    };
	    /**
	     * Returns this Long with bits logically shifted to the right by the given amount.
	     * @param numBits - Number of bits
	     * @returns Shifted Long
	     */
	    Long.prototype.shiftRightUnsigned = function (numBits) {
	        if (Long.isLong(numBits))
	            numBits = numBits.toInt();
	        numBits &= 63;
	        if (numBits === 0)
	            return this;
	        else {
	            var high = this.high;
	            if (numBits < 32) {
	                var low = this.low;
	                return Long.fromBits((low >>> numBits) | (high << (32 - numBits)), high >>> numBits, this.unsigned);
	            }
	            else if (numBits === 32)
	                return Long.fromBits(high, 0, this.unsigned);
	            else
	                return Long.fromBits(high >>> (numBits - 32), 0, this.unsigned);
	        }
	    };
	    /** This is an alias of {@link Long.shiftRightUnsigned} */
	    Long.prototype.shr_u = function (numBits) {
	        return this.shiftRightUnsigned(numBits);
	    };
	    /** This is an alias of {@link Long.shiftRightUnsigned} */
	    Long.prototype.shru = function (numBits) {
	        return this.shiftRightUnsigned(numBits);
	    };
	    /**
	     * Returns the difference of this and the specified Long.
	     * @param subtrahend - Subtrahend
	     * @returns Difference
	     */
	    Long.prototype.subtract = function (subtrahend) {
	        if (!Long.isLong(subtrahend))
	            subtrahend = Long.fromValue(subtrahend);
	        return this.add(subtrahend.neg());
	    };
	    /** This is an alias of {@link Long.subtract} */
	    Long.prototype.sub = function (subtrahend) {
	        return this.subtract(subtrahend);
	    };
	    /** Converts the Long to a 32 bit integer, assuming it is a 32 bit integer. */
	    Long.prototype.toInt = function () {
	        return this.unsigned ? this.low >>> 0 : this.low;
	    };
	    /** Converts the Long to a the nearest floating-point representation of this value (double, 53 bit mantissa). */
	    Long.prototype.toNumber = function () {
	        if (this.unsigned)
	            return (this.high >>> 0) * TWO_PWR_32_DBL + (this.low >>> 0);
	        return this.high * TWO_PWR_32_DBL + (this.low >>> 0);
	    };
	    /** Converts the Long to a BigInt (arbitrary precision). */
	    Long.prototype.toBigInt = function () {
	        return BigInt(this.toString());
	    };
	    /**
	     * Converts this Long to its byte representation.
	     * @param le - Whether little or big endian, defaults to big endian
	     * @returns Byte representation
	     */
	    Long.prototype.toBytes = function (le) {
	        return le ? this.toBytesLE() : this.toBytesBE();
	    };
	    /**
	     * Converts this Long to its little endian byte representation.
	     * @returns Little endian byte representation
	     */
	    Long.prototype.toBytesLE = function () {
	        var hi = this.high, lo = this.low;
	        return [
	            lo & 0xff,
	            (lo >>> 8) & 0xff,
	            (lo >>> 16) & 0xff,
	            lo >>> 24,
	            hi & 0xff,
	            (hi >>> 8) & 0xff,
	            (hi >>> 16) & 0xff,
	            hi >>> 24
	        ];
	    };
	    /**
	     * Converts this Long to its big endian byte representation.
	     * @returns Big endian byte representation
	     */
	    Long.prototype.toBytesBE = function () {
	        var hi = this.high, lo = this.low;
	        return [
	            hi >>> 24,
	            (hi >>> 16) & 0xff,
	            (hi >>> 8) & 0xff,
	            hi & 0xff,
	            lo >>> 24,
	            (lo >>> 16) & 0xff,
	            (lo >>> 8) & 0xff,
	            lo & 0xff
	        ];
	    };
	    /**
	     * Converts this Long to signed.
	     */
	    Long.prototype.toSigned = function () {
	        if (!this.unsigned)
	            return this;
	        return Long.fromBits(this.low, this.high, false);
	    };
	    /**
	     * Converts the Long to a string written in the specified radix.
	     * @param radix - Radix (2-36), defaults to 10
	     * @throws RangeError If `radix` is out of range
	     */
	    Long.prototype.toString = function (radix) {
	        radix = radix || 10;
	        if (radix < 2 || 36 < radix)
	            throw RangeError('radix');
	        if (this.isZero())
	            return '0';
	        if (this.isNegative()) {
	            // Unsigned Longs are never negative
	            if (this.eq(Long.MIN_VALUE)) {
	                // We need to change the Long value before it can be negated, so we remove
	                // the bottom-most digit in this base and then recurse to do the rest.
	                var radixLong = Long.fromNumber(radix), div = this.div(radixLong), rem1 = div.mul(radixLong).sub(this);
	                return div.toString(radix) + rem1.toInt().toString(radix);
	            }
	            else
	                return '-' + this.neg().toString(radix);
	        }
	        // Do several (6) digits each time through the loop, so as to
	        // minimize the calls to the very expensive emulated div.
	        var radixToPower = Long.fromNumber(Math.pow(radix, 6), this.unsigned);
	        // eslint-disable-next-line @typescript-eslint/no-this-alias
	        var rem = this;
	        var result = '';
	        // eslint-disable-next-line no-constant-condition
	        while (true) {
	            var remDiv = rem.div(radixToPower);
	            var intval = rem.sub(remDiv.mul(radixToPower)).toInt() >>> 0;
	            var digits = intval.toString(radix);
	            rem = remDiv;
	            if (rem.isZero()) {
	                return digits + result;
	            }
	            else {
	                while (digits.length < 6)
	                    digits = '0' + digits;
	                result = '' + digits + result;
	            }
	        }
	    };
	    /** Converts this Long to unsigned. */
	    Long.prototype.toUnsigned = function () {
	        if (this.unsigned)
	            return this;
	        return Long.fromBits(this.low, this.high, true);
	    };
	    /** Returns the bitwise XOR of this Long and the given one. */
	    Long.prototype.xor = function (other) {
	        if (!Long.isLong(other))
	            other = Long.fromValue(other);
	        return Long.fromBits(this.low ^ other.low, this.high ^ other.high, this.unsigned);
	    };
	    /** This is an alias of {@link Long.isZero} */
	    Long.prototype.eqz = function () {
	        return this.isZero();
	    };
	    /** This is an alias of {@link Long.lessThanOrEqual} */
	    Long.prototype.le = function (other) {
	        return this.lessThanOrEqual(other);
	    };
	    /*
	     ****************************************************************
	     *                  BSON SPECIFIC ADDITIONS                     *
	     ****************************************************************
	     */
	    Long.prototype.toExtendedJSON = function (options) {
	        if (options && options.relaxed)
	            return this.toNumber();
	        return { $numberLong: this.toString() };
	    };
	    Long.fromExtendedJSON = function (doc, options) {
	        var result = Long.fromString(doc.$numberLong);
	        return options && options.relaxed ? result.toNumber() : result;
	    };
	    /** @internal */
	    Long.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    Long.prototype.inspect = function () {
	        return "new Long(\"".concat(this.toString(), "\"").concat(this.unsigned ? ', true' : '', ")");
	    };
	    Long.TWO_PWR_24 = Long.fromInt(TWO_PWR_24_DBL);
	    /** Maximum unsigned value. */
	    Long.MAX_UNSIGNED_VALUE = Long.fromBits(0xffffffff | 0, 0xffffffff | 0, true);
	    /** Signed zero */
	    Long.ZERO = Long.fromInt(0);
	    /** Unsigned zero. */
	    Long.UZERO = Long.fromInt(0, true);
	    /** Signed one. */
	    Long.ONE = Long.fromInt(1);
	    /** Unsigned one. */
	    Long.UONE = Long.fromInt(1, true);
	    /** Signed negative one. */
	    Long.NEG_ONE = Long.fromInt(-1);
	    /** Maximum signed value. */
	    Long.MAX_VALUE = Long.fromBits(0xffffffff | 0, 0x7fffffff | 0, false);
	    /** Minimum signed value. */
	    Long.MIN_VALUE = Long.fromBits(0, 0x80000000 | 0, false);
	    return Long;
	}());
	Object.defineProperty(Long.prototype, '__isLong__', { value: true });
	Object.defineProperty(Long.prototype, '_bsontype', { value: 'Long' });

	var PARSE_STRING_REGEXP = /^(\+|-)?(\d+|(\d*\.\d*))?(E|e)?([-+])?(\d+)?$/;
	var PARSE_INF_REGEXP = /^(\+|-)?(Infinity|inf)$/i;
	var PARSE_NAN_REGEXP = /^(\+|-)?NaN$/i;
	var EXPONENT_MAX = 6111;
	var EXPONENT_MIN = -6176;
	var EXPONENT_BIAS = 6176;
	var MAX_DIGITS = 34;
	// Nan value bits as 32 bit values (due to lack of longs)
	var NAN_BUFFER = [
	    0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
	].reverse();
	// Infinity value bits 32 bit values (due to lack of longs)
	var INF_NEGATIVE_BUFFER = [
	    0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
	].reverse();
	var INF_POSITIVE_BUFFER = [
	    0x78, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
	].reverse();
	var EXPONENT_REGEX = /^([-+])?(\d+)?$/;
	// Extract least significant 5 bits
	var COMBINATION_MASK = 0x1f;
	// Extract least significant 14 bits
	var EXPONENT_MASK = 0x3fff;
	// Value of combination field for Inf
	var COMBINATION_INFINITY = 30;
	// Value of combination field for NaN
	var COMBINATION_NAN = 31;
	// Detect if the value is a digit
	function isDigit(value) {
	    return !isNaN(parseInt(value, 10));
	}
	// Divide two uint128 values
	function divideu128(value) {
	    var DIVISOR = Long.fromNumber(1000 * 1000 * 1000);
	    var _rem = Long.fromNumber(0);
	    if (!value.parts[0] && !value.parts[1] && !value.parts[2] && !value.parts[3]) {
	        return { quotient: value, rem: _rem };
	    }
	    for (var i = 0; i <= 3; i++) {
	        // Adjust remainder to match value of next dividend
	        _rem = _rem.shiftLeft(32);
	        // Add the divided to _rem
	        _rem = _rem.add(new Long(value.parts[i], 0));
	        value.parts[i] = _rem.div(DIVISOR).low;
	        _rem = _rem.modulo(DIVISOR);
	    }
	    return { quotient: value, rem: _rem };
	}
	// Multiply two Long values and return the 128 bit value
	function multiply64x2(left, right) {
	    if (!left && !right) {
	        return { high: Long.fromNumber(0), low: Long.fromNumber(0) };
	    }
	    var leftHigh = left.shiftRightUnsigned(32);
	    var leftLow = new Long(left.getLowBits(), 0);
	    var rightHigh = right.shiftRightUnsigned(32);
	    var rightLow = new Long(right.getLowBits(), 0);
	    var productHigh = leftHigh.multiply(rightHigh);
	    var productMid = leftHigh.multiply(rightLow);
	    var productMid2 = leftLow.multiply(rightHigh);
	    var productLow = leftLow.multiply(rightLow);
	    productHigh = productHigh.add(productMid.shiftRightUnsigned(32));
	    productMid = new Long(productMid.getLowBits(), 0)
	        .add(productMid2)
	        .add(productLow.shiftRightUnsigned(32));
	    productHigh = productHigh.add(productMid.shiftRightUnsigned(32));
	    productLow = productMid.shiftLeft(32).add(new Long(productLow.getLowBits(), 0));
	    // Return the 128 bit result
	    return { high: productHigh, low: productLow };
	}
	function lessThan(left, right) {
	    // Make values unsigned
	    var uhleft = left.high >>> 0;
	    var uhright = right.high >>> 0;
	    // Compare high bits first
	    if (uhleft < uhright) {
	        return true;
	    }
	    else if (uhleft === uhright) {
	        var ulleft = left.low >>> 0;
	        var ulright = right.low >>> 0;
	        if (ulleft < ulright)
	            return true;
	    }
	    return false;
	}
	function invalidErr(string, message) {
	    throw new BSONTypeError("\"".concat(string, "\" is not a valid Decimal128 string - ").concat(message));
	}
	/**
	 * A class representation of the BSON Decimal128 type.
	 * @public
	 * @category BSONType
	 */
	var Decimal128 = /** @class */ (function () {
	    /**
	     * @param bytes - a buffer containing the raw Decimal128 bytes in little endian order,
	     *                or a string representation as returned by .toString()
	     */
	    function Decimal128(bytes) {
	        if (!(this instanceof Decimal128))
	            return new Decimal128(bytes);
	        if (typeof bytes === 'string') {
	            this.bytes = Decimal128.fromString(bytes).bytes;
	        }
	        else if (isUint8Array(bytes)) {
	            if (bytes.byteLength !== 16) {
	                throw new BSONTypeError('Decimal128 must take a Buffer of 16 bytes');
	            }
	            this.bytes = bytes;
	        }
	        else {
	            throw new BSONTypeError('Decimal128 must take a Buffer or string');
	        }
	    }
	    /**
	     * Create a Decimal128 instance from a string representation
	     *
	     * @param representation - a numeric string representation.
	     */
	    Decimal128.fromString = function (representation) {
	        // Parse state tracking
	        var isNegative = false;
	        var sawRadix = false;
	        var foundNonZero = false;
	        // Total number of significant digits (no leading or trailing zero)
	        var significantDigits = 0;
	        // Total number of significand digits read
	        var nDigitsRead = 0;
	        // Total number of digits (no leading zeros)
	        var nDigits = 0;
	        // The number of the digits after radix
	        var radixPosition = 0;
	        // The index of the first non-zero in *str*
	        var firstNonZero = 0;
	        // Digits Array
	        var digits = [0];
	        // The number of digits in digits
	        var nDigitsStored = 0;
	        // Insertion pointer for digits
	        var digitsInsert = 0;
	        // The index of the first non-zero digit
	        var firstDigit = 0;
	        // The index of the last digit
	        var lastDigit = 0;
	        // Exponent
	        var exponent = 0;
	        // loop index over array
	        var i = 0;
	        // The high 17 digits of the significand
	        var significandHigh = new Long(0, 0);
	        // The low 17 digits of the significand
	        var significandLow = new Long(0, 0);
	        // The biased exponent
	        var biasedExponent = 0;
	        // Read index
	        var index = 0;
	        // Naively prevent against REDOS attacks.
	        // TODO: implementing a custom parsing for this, or refactoring the regex would yield
	        //       further gains.
	        if (representation.length >= 7000) {
	            throw new BSONTypeError('' + representation + ' not a valid Decimal128 string');
	        }
	        // Results
	        var stringMatch = representation.match(PARSE_STRING_REGEXP);
	        var infMatch = representation.match(PARSE_INF_REGEXP);
	        var nanMatch = representation.match(PARSE_NAN_REGEXP);
	        // Validate the string
	        if ((!stringMatch && !infMatch && !nanMatch) || representation.length === 0) {
	            throw new BSONTypeError('' + representation + ' not a valid Decimal128 string');
	        }
	        if (stringMatch) {
	            // full_match = stringMatch[0]
	            // sign = stringMatch[1]
	            var unsignedNumber = stringMatch[2];
	            // stringMatch[3] is undefined if a whole number (ex "1", 12")
	            // but defined if a number w/ decimal in it (ex "1.0, 12.2")
	            var e = stringMatch[4];
	            var expSign = stringMatch[5];
	            var expNumber = stringMatch[6];
	            // they provided e, but didn't give an exponent number. for ex "1e"
	            if (e && expNumber === undefined)
	                invalidErr(representation, 'missing exponent power');
	            // they provided e, but didn't give a number before it. for ex "e1"
	            if (e && unsignedNumber === undefined)
	                invalidErr(representation, 'missing exponent base');
	            if (e === undefined && (expSign || expNumber)) {
	                invalidErr(representation, 'missing e before exponent');
	            }
	        }
	        // Get the negative or positive sign
	        if (representation[index] === '+' || representation[index] === '-') {
	            isNegative = representation[index++] === '-';
	        }
	        // Check if user passed Infinity or NaN
	        if (!isDigit(representation[index]) && representation[index] !== '.') {
	            if (representation[index] === 'i' || representation[index] === 'I') {
	                return new Decimal128(buffer_1.from(isNegative ? INF_NEGATIVE_BUFFER : INF_POSITIVE_BUFFER));
	            }
	            else if (representation[index] === 'N') {
	                return new Decimal128(buffer_1.from(NAN_BUFFER));
	            }
	        }
	        // Read all the digits
	        while (isDigit(representation[index]) || representation[index] === '.') {
	            if (representation[index] === '.') {
	                if (sawRadix)
	                    invalidErr(representation, 'contains multiple periods');
	                sawRadix = true;
	                index = index + 1;
	                continue;
	            }
	            if (nDigitsStored < 34) {
	                if (representation[index] !== '0' || foundNonZero) {
	                    if (!foundNonZero) {
	                        firstNonZero = nDigitsRead;
	                    }
	                    foundNonZero = true;
	                    // Only store 34 digits
	                    digits[digitsInsert++] = parseInt(representation[index], 10);
	                    nDigitsStored = nDigitsStored + 1;
	                }
	            }
	            if (foundNonZero)
	                nDigits = nDigits + 1;
	            if (sawRadix)
	                radixPosition = radixPosition + 1;
	            nDigitsRead = nDigitsRead + 1;
	            index = index + 1;
	        }
	        if (sawRadix && !nDigitsRead)
	            throw new BSONTypeError('' + representation + ' not a valid Decimal128 string');
	        // Read exponent if exists
	        if (representation[index] === 'e' || representation[index] === 'E') {
	            // Read exponent digits
	            var match = representation.substr(++index).match(EXPONENT_REGEX);
	            // No digits read
	            if (!match || !match[2])
	                return new Decimal128(buffer_1.from(NAN_BUFFER));
	            // Get exponent
	            exponent = parseInt(match[0], 10);
	            // Adjust the index
	            index = index + match[0].length;
	        }
	        // Return not a number
	        if (representation[index])
	            return new Decimal128(buffer_1.from(NAN_BUFFER));
	        // Done reading input
	        // Find first non-zero digit in digits
	        firstDigit = 0;
	        if (!nDigitsStored) {
	            firstDigit = 0;
	            lastDigit = 0;
	            digits[0] = 0;
	            nDigits = 1;
	            nDigitsStored = 1;
	            significantDigits = 0;
	        }
	        else {
	            lastDigit = nDigitsStored - 1;
	            significantDigits = nDigits;
	            if (significantDigits !== 1) {
	                while (digits[firstNonZero + significantDigits - 1] === 0) {
	                    significantDigits = significantDigits - 1;
	                }
	            }
	        }
	        // Normalization of exponent
	        // Correct exponent based on radix position, and shift significand as needed
	        // to represent user input
	        // Overflow prevention
	        if (exponent <= radixPosition && radixPosition - exponent > 1 << 14) {
	            exponent = EXPONENT_MIN;
	        }
	        else {
	            exponent = exponent - radixPosition;
	        }
	        // Attempt to normalize the exponent
	        while (exponent > EXPONENT_MAX) {
	            // Shift exponent to significand and decrease
	            lastDigit = lastDigit + 1;
	            if (lastDigit - firstDigit > MAX_DIGITS) {
	                // Check if we have a zero then just hard clamp, otherwise fail
	                var digitsString = digits.join('');
	                if (digitsString.match(/^0+$/)) {
	                    exponent = EXPONENT_MAX;
	                    break;
	                }
	                invalidErr(representation, 'overflow');
	            }
	            exponent = exponent - 1;
	        }
	        while (exponent < EXPONENT_MIN || nDigitsStored < nDigits) {
	            // Shift last digit. can only do this if < significant digits than # stored.
	            if (lastDigit === 0 && significantDigits < nDigitsStored) {
	                exponent = EXPONENT_MIN;
	                significantDigits = 0;
	                break;
	            }
	            if (nDigitsStored < nDigits) {
	                // adjust to match digits not stored
	                nDigits = nDigits - 1;
	            }
	            else {
	                // adjust to round
	                lastDigit = lastDigit - 1;
	            }
	            if (exponent < EXPONENT_MAX) {
	                exponent = exponent + 1;
	            }
	            else {
	                // Check if we have a zero then just hard clamp, otherwise fail
	                var digitsString = digits.join('');
	                if (digitsString.match(/^0+$/)) {
	                    exponent = EXPONENT_MAX;
	                    break;
	                }
	                invalidErr(representation, 'overflow');
	            }
	        }
	        // Round
	        // We've normalized the exponent, but might still need to round.
	        if (lastDigit - firstDigit + 1 < significantDigits) {
	            var endOfString = nDigitsRead;
	            // If we have seen a radix point, 'string' is 1 longer than we have
	            // documented with ndigits_read, so inc the position of the first nonzero
	            // digit and the position that digits are read to.
	            if (sawRadix) {
	                firstNonZero = firstNonZero + 1;
	                endOfString = endOfString + 1;
	            }
	            // if negative, we need to increment again to account for - sign at start.
	            if (isNegative) {
	                firstNonZero = firstNonZero + 1;
	                endOfString = endOfString + 1;
	            }
	            var roundDigit = parseInt(representation[firstNonZero + lastDigit + 1], 10);
	            var roundBit = 0;
	            if (roundDigit >= 5) {
	                roundBit = 1;
	                if (roundDigit === 5) {
	                    roundBit = digits[lastDigit] % 2 === 1 ? 1 : 0;
	                    for (i = firstNonZero + lastDigit + 2; i < endOfString; i++) {
	                        if (parseInt(representation[i], 10)) {
	                            roundBit = 1;
	                            break;
	                        }
	                    }
	                }
	            }
	            if (roundBit) {
	                var dIdx = lastDigit;
	                for (; dIdx >= 0; dIdx--) {
	                    if (++digits[dIdx] > 9) {
	                        digits[dIdx] = 0;
	                        // overflowed most significant digit
	                        if (dIdx === 0) {
	                            if (exponent < EXPONENT_MAX) {
	                                exponent = exponent + 1;
	                                digits[dIdx] = 1;
	                            }
	                            else {
	                                return new Decimal128(buffer_1.from(isNegative ? INF_NEGATIVE_BUFFER : INF_POSITIVE_BUFFER));
	                            }
	                        }
	                    }
	                }
	            }
	        }
	        // Encode significand
	        // The high 17 digits of the significand
	        significandHigh = Long.fromNumber(0);
	        // The low 17 digits of the significand
	        significandLow = Long.fromNumber(0);
	        // read a zero
	        if (significantDigits === 0) {
	            significandHigh = Long.fromNumber(0);
	            significandLow = Long.fromNumber(0);
	        }
	        else if (lastDigit - firstDigit < 17) {
	            var dIdx = firstDigit;
	            significandLow = Long.fromNumber(digits[dIdx++]);
	            significandHigh = new Long(0, 0);
	            for (; dIdx <= lastDigit; dIdx++) {
	                significandLow = significandLow.multiply(Long.fromNumber(10));
	                significandLow = significandLow.add(Long.fromNumber(digits[dIdx]));
	            }
	        }
	        else {
	            var dIdx = firstDigit;
	            significandHigh = Long.fromNumber(digits[dIdx++]);
	            for (; dIdx <= lastDigit - 17; dIdx++) {
	                significandHigh = significandHigh.multiply(Long.fromNumber(10));
	                significandHigh = significandHigh.add(Long.fromNumber(digits[dIdx]));
	            }
	            significandLow = Long.fromNumber(digits[dIdx++]);
	            for (; dIdx <= lastDigit; dIdx++) {
	                significandLow = significandLow.multiply(Long.fromNumber(10));
	                significandLow = significandLow.add(Long.fromNumber(digits[dIdx]));
	            }
	        }
	        var significand = multiply64x2(significandHigh, Long.fromString('100000000000000000'));
	        significand.low = significand.low.add(significandLow);
	        if (lessThan(significand.low, significandLow)) {
	            significand.high = significand.high.add(Long.fromNumber(1));
	        }
	        // Biased exponent
	        biasedExponent = exponent + EXPONENT_BIAS;
	        var dec = { low: Long.fromNumber(0), high: Long.fromNumber(0) };
	        // Encode combination, exponent, and significand.
	        if (significand.high.shiftRightUnsigned(49).and(Long.fromNumber(1)).equals(Long.fromNumber(1))) {
	            // Encode '11' into bits 1 to 3
	            dec.high = dec.high.or(Long.fromNumber(0x3).shiftLeft(61));
	            dec.high = dec.high.or(Long.fromNumber(biasedExponent).and(Long.fromNumber(0x3fff).shiftLeft(47)));
	            dec.high = dec.high.or(significand.high.and(Long.fromNumber(0x7fffffffffff)));
	        }
	        else {
	            dec.high = dec.high.or(Long.fromNumber(biasedExponent & 0x3fff).shiftLeft(49));
	            dec.high = dec.high.or(significand.high.and(Long.fromNumber(0x1ffffffffffff)));
	        }
	        dec.low = significand.low;
	        // Encode sign
	        if (isNegative) {
	            dec.high = dec.high.or(Long.fromString('9223372036854775808'));
	        }
	        // Encode into a buffer
	        var buffer = buffer_1.alloc(16);
	        index = 0;
	        // Encode the low 64 bits of the decimal
	        // Encode low bits
	        buffer[index++] = dec.low.low & 0xff;
	        buffer[index++] = (dec.low.low >> 8) & 0xff;
	        buffer[index++] = (dec.low.low >> 16) & 0xff;
	        buffer[index++] = (dec.low.low >> 24) & 0xff;
	        // Encode high bits
	        buffer[index++] = dec.low.high & 0xff;
	        buffer[index++] = (dec.low.high >> 8) & 0xff;
	        buffer[index++] = (dec.low.high >> 16) & 0xff;
	        buffer[index++] = (dec.low.high >> 24) & 0xff;
	        // Encode the high 64 bits of the decimal
	        // Encode low bits
	        buffer[index++] = dec.high.low & 0xff;
	        buffer[index++] = (dec.high.low >> 8) & 0xff;
	        buffer[index++] = (dec.high.low >> 16) & 0xff;
	        buffer[index++] = (dec.high.low >> 24) & 0xff;
	        // Encode high bits
	        buffer[index++] = dec.high.high & 0xff;
	        buffer[index++] = (dec.high.high >> 8) & 0xff;
	        buffer[index++] = (dec.high.high >> 16) & 0xff;
	        buffer[index++] = (dec.high.high >> 24) & 0xff;
	        // Return the new Decimal128
	        return new Decimal128(buffer);
	    };
	    /** Create a string representation of the raw Decimal128 value */
	    Decimal128.prototype.toString = function () {
	        // Note: bits in this routine are referred to starting at 0,
	        // from the sign bit, towards the coefficient.
	        // decoded biased exponent (14 bits)
	        var biased_exponent;
	        // the number of significand digits
	        var significand_digits = 0;
	        // the base-10 digits in the significand
	        var significand = new Array(36);
	        for (var i = 0; i < significand.length; i++)
	            significand[i] = 0;
	        // read pointer into significand
	        var index = 0;
	        // true if the number is zero
	        var is_zero = false;
	        // the most significant significand bits (50-46)
	        var significand_msb;
	        // temporary storage for significand decoding
	        var significand128 = { parts: [0, 0, 0, 0] };
	        // indexing variables
	        var j, k;
	        // Output string
	        var string = [];
	        // Unpack index
	        index = 0;
	        // Buffer reference
	        var buffer = this.bytes;
	        // Unpack the low 64bits into a long
	        // bits 96 - 127
	        var low = buffer[index++] | (buffer[index++] << 8) | (buffer[index++] << 16) | (buffer[index++] << 24);
	        // bits 64 - 95
	        var midl = buffer[index++] | (buffer[index++] << 8) | (buffer[index++] << 16) | (buffer[index++] << 24);
	        // Unpack the high 64bits into a long
	        // bits 32 - 63
	        var midh = buffer[index++] | (buffer[index++] << 8) | (buffer[index++] << 16) | (buffer[index++] << 24);
	        // bits 0 - 31
	        var high = buffer[index++] | (buffer[index++] << 8) | (buffer[index++] << 16) | (buffer[index++] << 24);
	        // Unpack index
	        index = 0;
	        // Create the state of the decimal
	        var dec = {
	            low: new Long(low, midl),
	            high: new Long(midh, high)
	        };
	        if (dec.high.lessThan(Long.ZERO)) {
	            string.push('-');
	        }
	        // Decode combination field and exponent
	        // bits 1 - 5
	        var combination = (high >> 26) & COMBINATION_MASK;
	        if (combination >> 3 === 3) {
	            // Check for 'special' values
	            if (combination === COMBINATION_INFINITY) {
	                return string.join('') + 'Infinity';
	            }
	            else if (combination === COMBINATION_NAN) {
	                return 'NaN';
	            }
	            else {
	                biased_exponent = (high >> 15) & EXPONENT_MASK;
	                significand_msb = 0x08 + ((high >> 14) & 0x01);
	            }
	        }
	        else {
	            significand_msb = (high >> 14) & 0x07;
	            biased_exponent = (high >> 17) & EXPONENT_MASK;
	        }
	        // unbiased exponent
	        var exponent = biased_exponent - EXPONENT_BIAS;
	        // Create string of significand digits
	        // Convert the 114-bit binary number represented by
	        // (significand_high, significand_low) to at most 34 decimal
	        // digits through modulo and division.
	        significand128.parts[0] = (high & 0x3fff) + ((significand_msb & 0xf) << 14);
	        significand128.parts[1] = midh;
	        significand128.parts[2] = midl;
	        significand128.parts[3] = low;
	        if (significand128.parts[0] === 0 &&
	            significand128.parts[1] === 0 &&
	            significand128.parts[2] === 0 &&
	            significand128.parts[3] === 0) {
	            is_zero = true;
	        }
	        else {
	            for (k = 3; k >= 0; k--) {
	                var least_digits = 0;
	                // Perform the divide
	                var result = divideu128(significand128);
	                significand128 = result.quotient;
	                least_digits = result.rem.low;
	                // We now have the 9 least significant digits (in base 2).
	                // Convert and output to string.
	                if (!least_digits)
	                    continue;
	                for (j = 8; j >= 0; j--) {
	                    // significand[k * 9 + j] = Math.round(least_digits % 10);
	                    significand[k * 9 + j] = least_digits % 10;
	                    // least_digits = Math.round(least_digits / 10);
	                    least_digits = Math.floor(least_digits / 10);
	                }
	            }
	        }
	        // Output format options:
	        // Scientific - [-]d.dddE(+/-)dd or [-]dE(+/-)dd
	        // Regular    - ddd.ddd
	        if (is_zero) {
	            significand_digits = 1;
	            significand[index] = 0;
	        }
	        else {
	            significand_digits = 36;
	            while (!significand[index]) {
	                significand_digits = significand_digits - 1;
	                index = index + 1;
	            }
	        }
	        // the exponent if scientific notation is used
	        var scientific_exponent = significand_digits - 1 + exponent;
	        // The scientific exponent checks are dictated by the string conversion
	        // specification and are somewhat arbitrary cutoffs.
	        //
	        // We must check exponent > 0, because if this is the case, the number
	        // has trailing zeros.  However, we *cannot* output these trailing zeros,
	        // because doing so would change the precision of the value, and would
	        // change stored data if the string converted number is round tripped.
	        if (scientific_exponent >= 34 || scientific_exponent <= -7 || exponent > 0) {
	            // Scientific format
	            // if there are too many significant digits, we should just be treating numbers
	            // as + or - 0 and using the non-scientific exponent (this is for the "invalid
	            // representation should be treated as 0/-0" spec cases in decimal128-1.json)
	            if (significand_digits > 34) {
	                string.push("".concat(0));
	                if (exponent > 0)
	                    string.push("E+".concat(exponent));
	                else if (exponent < 0)
	                    string.push("E".concat(exponent));
	                return string.join('');
	            }
	            string.push("".concat(significand[index++]));
	            significand_digits = significand_digits - 1;
	            if (significand_digits) {
	                string.push('.');
	            }
	            for (var i = 0; i < significand_digits; i++) {
	                string.push("".concat(significand[index++]));
	            }
	            // Exponent
	            string.push('E');
	            if (scientific_exponent > 0) {
	                string.push("+".concat(scientific_exponent));
	            }
	            else {
	                string.push("".concat(scientific_exponent));
	            }
	        }
	        else {
	            // Regular format with no decimal place
	            if (exponent >= 0) {
	                for (var i = 0; i < significand_digits; i++) {
	                    string.push("".concat(significand[index++]));
	                }
	            }
	            else {
	                var radix_position = significand_digits + exponent;
	                // non-zero digits before radix
	                if (radix_position > 0) {
	                    for (var i = 0; i < radix_position; i++) {
	                        string.push("".concat(significand[index++]));
	                    }
	                }
	                else {
	                    string.push('0');
	                }
	                string.push('.');
	                // add leading zeros after radix
	                while (radix_position++ < 0) {
	                    string.push('0');
	                }
	                for (var i = 0; i < significand_digits - Math.max(radix_position - 1, 0); i++) {
	                    string.push("".concat(significand[index++]));
	                }
	            }
	        }
	        return string.join('');
	    };
	    Decimal128.prototype.toJSON = function () {
	        return { $numberDecimal: this.toString() };
	    };
	    /** @internal */
	    Decimal128.prototype.toExtendedJSON = function () {
	        return { $numberDecimal: this.toString() };
	    };
	    /** @internal */
	    Decimal128.fromExtendedJSON = function (doc) {
	        return Decimal128.fromString(doc.$numberDecimal);
	    };
	    /** @internal */
	    Decimal128.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    Decimal128.prototype.inspect = function () {
	        return "new Decimal128(\"".concat(this.toString(), "\")");
	    };
	    return Decimal128;
	}());
	Object.defineProperty(Decimal128.prototype, '_bsontype', { value: 'Decimal128' });

	/**
	 * A class representation of the BSON Double type.
	 * @public
	 * @category BSONType
	 */
	var Double = /** @class */ (function () {
	    /**
	     * Create a Double type
	     *
	     * @param value - the number we want to represent as a double.
	     */
	    function Double(value) {
	        if (!(this instanceof Double))
	            return new Double(value);
	        if (value instanceof Number) {
	            value = value.valueOf();
	        }
	        this.value = +value;
	    }
	    /**
	     * Access the number value.
	     *
	     * @returns returns the wrapped double number.
	     */
	    Double.prototype.valueOf = function () {
	        return this.value;
	    };
	    Double.prototype.toJSON = function () {
	        return this.value;
	    };
	    Double.prototype.toString = function (radix) {
	        return this.value.toString(radix);
	    };
	    /** @internal */
	    Double.prototype.toExtendedJSON = function (options) {
	        if (options && (options.legacy || (options.relaxed && isFinite(this.value)))) {
	            return this.value;
	        }
	        // NOTE: JavaScript has +0 and -0, apparently to model limit calculations. If a user
	        // explicitly provided `-0` then we need to ensure the sign makes it into the output
	        if (Object.is(Math.sign(this.value), -0)) {
	            return { $numberDouble: "-".concat(this.value.toFixed(1)) };
	        }
	        var $numberDouble;
	        if (Number.isInteger(this.value)) {
	            $numberDouble = this.value.toFixed(1);
	            if ($numberDouble.length >= 13) {
	                $numberDouble = this.value.toExponential(13).toUpperCase();
	            }
	        }
	        else {
	            $numberDouble = this.value.toString();
	        }
	        return { $numberDouble: $numberDouble };
	    };
	    /** @internal */
	    Double.fromExtendedJSON = function (doc, options) {
	        var doubleValue = parseFloat(doc.$numberDouble);
	        return options && options.relaxed ? doubleValue : new Double(doubleValue);
	    };
	    /** @internal */
	    Double.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    Double.prototype.inspect = function () {
	        var eJSON = this.toExtendedJSON();
	        return "new Double(".concat(eJSON.$numberDouble, ")");
	    };
	    return Double;
	}());
	Object.defineProperty(Double.prototype, '_bsontype', { value: 'Double' });

	/**
	 * A class representation of a BSON Int32 type.
	 * @public
	 * @category BSONType
	 */
	var Int32 = /** @class */ (function () {
	    /**
	     * Create an Int32 type
	     *
	     * @param value - the number we want to represent as an int32.
	     */
	    function Int32(value) {
	        if (!(this instanceof Int32))
	            return new Int32(value);
	        if (value instanceof Number) {
	            value = value.valueOf();
	        }
	        this.value = +value | 0;
	    }
	    /**
	     * Access the number value.
	     *
	     * @returns returns the wrapped int32 number.
	     */
	    Int32.prototype.valueOf = function () {
	        return this.value;
	    };
	    Int32.prototype.toString = function (radix) {
	        return this.value.toString(radix);
	    };
	    Int32.prototype.toJSON = function () {
	        return this.value;
	    };
	    /** @internal */
	    Int32.prototype.toExtendedJSON = function (options) {
	        if (options && (options.relaxed || options.legacy))
	            return this.value;
	        return { $numberInt: this.value.toString() };
	    };
	    /** @internal */
	    Int32.fromExtendedJSON = function (doc, options) {
	        return options && options.relaxed ? parseInt(doc.$numberInt, 10) : new Int32(doc.$numberInt);
	    };
	    /** @internal */
	    Int32.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    Int32.prototype.inspect = function () {
	        return "new Int32(".concat(this.valueOf(), ")");
	    };
	    return Int32;
	}());
	Object.defineProperty(Int32.prototype, '_bsontype', { value: 'Int32' });

	/**
	 * A class representation of the BSON MaxKey type.
	 * @public
	 * @category BSONType
	 */
	var MaxKey = /** @class */ (function () {
	    function MaxKey() {
	        if (!(this instanceof MaxKey))
	            return new MaxKey();
	    }
	    /** @internal */
	    MaxKey.prototype.toExtendedJSON = function () {
	        return { $maxKey: 1 };
	    };
	    /** @internal */
	    MaxKey.fromExtendedJSON = function () {
	        return new MaxKey();
	    };
	    /** @internal */
	    MaxKey.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    MaxKey.prototype.inspect = function () {
	        return 'new MaxKey()';
	    };
	    return MaxKey;
	}());
	Object.defineProperty(MaxKey.prototype, '_bsontype', { value: 'MaxKey' });

	/**
	 * A class representation of the BSON MinKey type.
	 * @public
	 * @category BSONType
	 */
	var MinKey = /** @class */ (function () {
	    function MinKey() {
	        if (!(this instanceof MinKey))
	            return new MinKey();
	    }
	    /** @internal */
	    MinKey.prototype.toExtendedJSON = function () {
	        return { $minKey: 1 };
	    };
	    /** @internal */
	    MinKey.fromExtendedJSON = function () {
	        return new MinKey();
	    };
	    /** @internal */
	    MinKey.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    MinKey.prototype.inspect = function () {
	        return 'new MinKey()';
	    };
	    return MinKey;
	}());
	Object.defineProperty(MinKey.prototype, '_bsontype', { value: 'MinKey' });

	// Regular expression that checks for hex value
	var checkForHexRegExp = new RegExp('^[0-9a-fA-F]{24}$');
	// Unique sequence for the current process (initialized on first use)
	var PROCESS_UNIQUE = null;
	var kId = Symbol('id');
	/**
	 * A class representation of the BSON ObjectId type.
	 * @public
	 * @category BSONType
	 */
	var ObjectId = /** @class */ (function () {
	    /**
	     * Create an ObjectId type
	     *
	     * @param inputId - Can be a 24 character hex string, 12 byte binary Buffer, or a number.
	     */
	    function ObjectId(inputId) {
	        if (!(this instanceof ObjectId))
	            return new ObjectId(inputId);
	        // workingId is set based on type of input and whether valid id exists for the input
	        var workingId;
	        if (typeof inputId === 'object' && inputId && 'id' in inputId) {
	            if (typeof inputId.id !== 'string' && !ArrayBuffer.isView(inputId.id)) {
	                throw new BSONTypeError('Argument passed in must have an id that is of type string or Buffer');
	            }
	            if ('toHexString' in inputId && typeof inputId.toHexString === 'function') {
	                workingId = buffer_1.from(inputId.toHexString(), 'hex');
	            }
	            else {
	                workingId = inputId.id;
	            }
	        }
	        else {
	            workingId = inputId;
	        }
	        // the following cases use workingId to construct an ObjectId
	        if (workingId == null || typeof workingId === 'number') {
	            // The most common use case (blank id, new objectId instance)
	            // Generate a new id
	            this[kId] = ObjectId.generate(typeof workingId === 'number' ? workingId : undefined);
	        }
	        else if (ArrayBuffer.isView(workingId) && workingId.byteLength === 12) {
	            // If intstanceof matches we can escape calling ensure buffer in Node.js environments
	            this[kId] = workingId instanceof buffer_1 ? workingId : ensureBuffer(workingId);
	        }
	        else if (typeof workingId === 'string') {
	            if (workingId.length === 12) {
	                var bytes = buffer_1.from(workingId);
	                if (bytes.byteLength === 12) {
	                    this[kId] = bytes;
	                }
	                else {
	                    throw new BSONTypeError('Argument passed in must be a string of 12 bytes');
	                }
	            }
	            else if (workingId.length === 24 && checkForHexRegExp.test(workingId)) {
	                this[kId] = buffer_1.from(workingId, 'hex');
	            }
	            else {
	                throw new BSONTypeError('Argument passed in must be a string of 12 bytes or a string of 24 hex characters or an integer');
	            }
	        }
	        else {
	            throw new BSONTypeError('Argument passed in does not match the accepted types');
	        }
	        // If we are caching the hex string
	        if (ObjectId.cacheHexString) {
	            this.__id = this.id.toString('hex');
	        }
	    }
	    Object.defineProperty(ObjectId.prototype, "id", {
	        /**
	         * The ObjectId bytes
	         * @readonly
	         */
	        get: function () {
	            return this[kId];
	        },
	        set: function (value) {
	            this[kId] = value;
	            if (ObjectId.cacheHexString) {
	                this.__id = value.toString('hex');
	            }
	        },
	        enumerable: false,
	        configurable: true
	    });
	    Object.defineProperty(ObjectId.prototype, "generationTime", {
	        /**
	         * The generation time of this ObjectId instance
	         * @deprecated Please use getTimestamp / createFromTime which returns an int32 epoch
	         */
	        get: function () {
	            return this.id.readInt32BE(0);
	        },
	        set: function (value) {
	            // Encode time into first 4 bytes
	            this.id.writeUInt32BE(value, 0);
	        },
	        enumerable: false,
	        configurable: true
	    });
	    /** Returns the ObjectId id as a 24 character hex string representation */
	    ObjectId.prototype.toHexString = function () {
	        if (ObjectId.cacheHexString && this.__id) {
	            return this.__id;
	        }
	        var hexString = this.id.toString('hex');
	        if (ObjectId.cacheHexString && !this.__id) {
	            this.__id = hexString;
	        }
	        return hexString;
	    };
	    /**
	     * Update the ObjectId index
	     * @privateRemarks
	     * Used in generating new ObjectId's on the driver
	     * @internal
	     */
	    ObjectId.getInc = function () {
	        return (ObjectId.index = (ObjectId.index + 1) % 0xffffff);
	    };
	    /**
	     * Generate a 12 byte id buffer used in ObjectId's
	     *
	     * @param time - pass in a second based timestamp.
	     */
	    ObjectId.generate = function (time) {
	        if ('number' !== typeof time) {
	            time = Math.floor(Date.now() / 1000);
	        }
	        var inc = ObjectId.getInc();
	        var buffer = buffer_1.alloc(12);
	        // 4-byte timestamp
	        buffer.writeUInt32BE(time, 0);
	        // set PROCESS_UNIQUE if yet not initialized
	        if (PROCESS_UNIQUE === null) {
	            PROCESS_UNIQUE = randomBytes(5);
	        }
	        // 5-byte process unique
	        buffer[4] = PROCESS_UNIQUE[0];
	        buffer[5] = PROCESS_UNIQUE[1];
	        buffer[6] = PROCESS_UNIQUE[2];
	        buffer[7] = PROCESS_UNIQUE[3];
	        buffer[8] = PROCESS_UNIQUE[4];
	        // 3-byte counter
	        buffer[11] = inc & 0xff;
	        buffer[10] = (inc >> 8) & 0xff;
	        buffer[9] = (inc >> 16) & 0xff;
	        return buffer;
	    };
	    /**
	     * Converts the id into a 24 character hex string for printing
	     *
	     * @param format - The Buffer toString format parameter.
	     */
	    ObjectId.prototype.toString = function (format) {
	        // Is the id a buffer then use the buffer toString method to return the format
	        if (format)
	            return this.id.toString(format);
	        return this.toHexString();
	    };
	    /** Converts to its JSON the 24 character hex string representation. */
	    ObjectId.prototype.toJSON = function () {
	        return this.toHexString();
	    };
	    /**
	     * Compares the equality of this ObjectId with `otherID`.
	     *
	     * @param otherId - ObjectId instance to compare against.
	     */
	    ObjectId.prototype.equals = function (otherId) {
	        if (otherId === undefined || otherId === null) {
	            return false;
	        }
	        if (otherId instanceof ObjectId) {
	            return this[kId][11] === otherId[kId][11] && this[kId].equals(otherId[kId]);
	        }
	        if (typeof otherId === 'string' &&
	            ObjectId.isValid(otherId) &&
	            otherId.length === 12 &&
	            isUint8Array(this.id)) {
	            return otherId === buffer_1.prototype.toString.call(this.id, 'latin1');
	        }
	        if (typeof otherId === 'string' && ObjectId.isValid(otherId) && otherId.length === 24) {
	            return otherId.toLowerCase() === this.toHexString();
	        }
	        if (typeof otherId === 'string' && ObjectId.isValid(otherId) && otherId.length === 12) {
	            return buffer_1.from(otherId).equals(this.id);
	        }
	        if (typeof otherId === 'object' &&
	            'toHexString' in otherId &&
	            typeof otherId.toHexString === 'function') {
	            var otherIdString = otherId.toHexString();
	            var thisIdString = this.toHexString().toLowerCase();
	            return typeof otherIdString === 'string' && otherIdString.toLowerCase() === thisIdString;
	        }
	        return false;
	    };
	    /** Returns the generation date (accurate up to the second) that this ID was generated. */
	    ObjectId.prototype.getTimestamp = function () {
	        var timestamp = new Date();
	        var time = this.id.readUInt32BE(0);
	        timestamp.setTime(Math.floor(time) * 1000);
	        return timestamp;
	    };
	    /** @internal */
	    ObjectId.createPk = function () {
	        return new ObjectId();
	    };
	    /**
	     * Creates an ObjectId from a second based number, with the rest of the ObjectId zeroed out. Used for comparisons or sorting the ObjectId.
	     *
	     * @param time - an integer number representing a number of seconds.
	     */
	    ObjectId.createFromTime = function (time) {
	        var buffer = buffer_1.from([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]);
	        // Encode time into first 4 bytes
	        buffer.writeUInt32BE(time, 0);
	        // Return the new objectId
	        return new ObjectId(buffer);
	    };
	    /**
	     * Creates an ObjectId from a hex string representation of an ObjectId.
	     *
	     * @param hexString - create a ObjectId from a passed in 24 character hexstring.
	     */
	    ObjectId.createFromHexString = function (hexString) {
	        // Throw an error if it's not a valid setup
	        if (typeof hexString === 'undefined' || (hexString != null && hexString.length !== 24)) {
	            throw new BSONTypeError('Argument passed in must be a single String of 12 bytes or a string of 24 hex characters');
	        }
	        return new ObjectId(buffer_1.from(hexString, 'hex'));
	    };
	    /**
	     * Checks if a value is a valid bson ObjectId
	     *
	     * @param id - ObjectId instance to validate.
	     */
	    ObjectId.isValid = function (id) {
	        if (id == null)
	            return false;
	        try {
	            new ObjectId(id);
	            return true;
	        }
	        catch (_a) {
	            return false;
	        }
	    };
	    /** @internal */
	    ObjectId.prototype.toExtendedJSON = function () {
	        if (this.toHexString)
	            return { $oid: this.toHexString() };
	        return { $oid: this.toString('hex') };
	    };
	    /** @internal */
	    ObjectId.fromExtendedJSON = function (doc) {
	        return new ObjectId(doc.$oid);
	    };
	    /**
	     * Converts to a string representation of this Id.
	     *
	     * @returns return the 24 character hex string representation.
	     * @internal
	     */
	    ObjectId.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    ObjectId.prototype.inspect = function () {
	        return "new ObjectId(\"".concat(this.toHexString(), "\")");
	    };
	    /** @internal */
	    ObjectId.index = Math.floor(Math.random() * 0xffffff);
	    return ObjectId;
	}());
	// Deprecated methods
	Object.defineProperty(ObjectId.prototype, 'generate', {
	    value: deprecate(function (time) { return ObjectId.generate(time); }, 'Please use the static `ObjectId.generate(time)` instead')
	});
	Object.defineProperty(ObjectId.prototype, 'getInc', {
	    value: deprecate(function () { return ObjectId.getInc(); }, 'Please use the static `ObjectId.getInc()` instead')
	});
	Object.defineProperty(ObjectId.prototype, 'get_inc', {
	    value: deprecate(function () { return ObjectId.getInc(); }, 'Please use the static `ObjectId.getInc()` instead')
	});
	Object.defineProperty(ObjectId, 'get_inc', {
	    value: deprecate(function () { return ObjectId.getInc(); }, 'Please use the static `ObjectId.getInc()` instead')
	});
	Object.defineProperty(ObjectId.prototype, '_bsontype', { value: 'ObjectID' });

	function alphabetize(str) {
	    return str.split('').sort().join('');
	}
	/**
	 * A class representation of the BSON RegExp type.
	 * @public
	 * @category BSONType
	 */
	var BSONRegExp = /** @class */ (function () {
	    /**
	     * @param pattern - The regular expression pattern to match
	     * @param options - The regular expression options
	     */
	    function BSONRegExp(pattern, options) {
	        if (!(this instanceof BSONRegExp))
	            return new BSONRegExp(pattern, options);
	        this.pattern = pattern;
	        this.options = alphabetize(options !== null && options !== void 0 ? options : '');
	        if (this.pattern.indexOf('\x00') !== -1) {
	            throw new BSONError("BSON Regex patterns cannot contain null bytes, found: ".concat(JSON.stringify(this.pattern)));
	        }
	        if (this.options.indexOf('\x00') !== -1) {
	            throw new BSONError("BSON Regex options cannot contain null bytes, found: ".concat(JSON.stringify(this.options)));
	        }
	        // Validate options
	        for (var i = 0; i < this.options.length; i++) {
	            if (!(this.options[i] === 'i' ||
	                this.options[i] === 'm' ||
	                this.options[i] === 'x' ||
	                this.options[i] === 'l' ||
	                this.options[i] === 's' ||
	                this.options[i] === 'u')) {
	                throw new BSONError("The regular expression option [".concat(this.options[i], "] is not supported"));
	            }
	        }
	    }
	    BSONRegExp.parseOptions = function (options) {
	        return options ? options.split('').sort().join('') : '';
	    };
	    /** @internal */
	    BSONRegExp.prototype.toExtendedJSON = function (options) {
	        options = options || {};
	        if (options.legacy) {
	            return { $regex: this.pattern, $options: this.options };
	        }
	        return { $regularExpression: { pattern: this.pattern, options: this.options } };
	    };
	    /** @internal */
	    BSONRegExp.fromExtendedJSON = function (doc) {
	        if ('$regex' in doc) {
	            if (typeof doc.$regex !== 'string') {
	                // This is for $regex query operators that have extended json values.
	                if (doc.$regex._bsontype === 'BSONRegExp') {
	                    return doc;
	                }
	            }
	            else {
	                return new BSONRegExp(doc.$regex, BSONRegExp.parseOptions(doc.$options));
	            }
	        }
	        if ('$regularExpression' in doc) {
	            return new BSONRegExp(doc.$regularExpression.pattern, BSONRegExp.parseOptions(doc.$regularExpression.options));
	        }
	        throw new BSONTypeError("Unexpected BSONRegExp EJSON object form: ".concat(JSON.stringify(doc)));
	    };
	    return BSONRegExp;
	}());
	Object.defineProperty(BSONRegExp.prototype, '_bsontype', { value: 'BSONRegExp' });

	/**
	 * A class representation of the BSON Symbol type.
	 * @public
	 * @category BSONType
	 */
	var BSONSymbol = /** @class */ (function () {
	    /**
	     * @param value - the string representing the symbol.
	     */
	    function BSONSymbol(value) {
	        if (!(this instanceof BSONSymbol))
	            return new BSONSymbol(value);
	        this.value = value;
	    }
	    /** Access the wrapped string value. */
	    BSONSymbol.prototype.valueOf = function () {
	        return this.value;
	    };
	    BSONSymbol.prototype.toString = function () {
	        return this.value;
	    };
	    /** @internal */
	    BSONSymbol.prototype.inspect = function () {
	        return "new BSONSymbol(\"".concat(this.value, "\")");
	    };
	    BSONSymbol.prototype.toJSON = function () {
	        return this.value;
	    };
	    /** @internal */
	    BSONSymbol.prototype.toExtendedJSON = function () {
	        return { $symbol: this.value };
	    };
	    /** @internal */
	    BSONSymbol.fromExtendedJSON = function (doc) {
	        return new BSONSymbol(doc.$symbol);
	    };
	    /** @internal */
	    BSONSymbol.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    return BSONSymbol;
	}());
	Object.defineProperty(BSONSymbol.prototype, '_bsontype', { value: 'Symbol' });

	/** @public */
	var LongWithoutOverridesClass = Long;
	/**
	 * @public
	 * @category BSONType
	 * */
	var Timestamp = /** @class */ (function (_super) {
	    __extends(Timestamp, _super);
	    function Timestamp(low, high) {
	        var _this = this;
	        // eslint-disable-next-line @typescript-eslint/ban-ts-comment
	        // @ts-expect-error
	        if (!(_this instanceof Timestamp))
	            return new Timestamp(low, high);
	        if (Long.isLong(low)) {
	            _this = _super.call(this, low.low, low.high, true) || this;
	        }
	        else if (isObjectLike(low) && typeof low.t !== 'undefined' && typeof low.i !== 'undefined') {
	            _this = _super.call(this, low.i, low.t, true) || this;
	        }
	        else {
	            _this = _super.call(this, low, high, true) || this;
	        }
	        Object.defineProperty(_this, '_bsontype', {
	            value: 'Timestamp',
	            writable: false,
	            configurable: false,
	            enumerable: false
	        });
	        return _this;
	    }
	    Timestamp.prototype.toJSON = function () {
	        return {
	            $timestamp: this.toString()
	        };
	    };
	    /** Returns a Timestamp represented by the given (32-bit) integer value. */
	    Timestamp.fromInt = function (value) {
	        return new Timestamp(Long.fromInt(value, true));
	    };
	    /** Returns a Timestamp representing the given number value, provided that it is a finite number. Otherwise, zero is returned. */
	    Timestamp.fromNumber = function (value) {
	        return new Timestamp(Long.fromNumber(value, true));
	    };
	    /**
	     * Returns a Timestamp for the given high and low bits. Each is assumed to use 32 bits.
	     *
	     * @param lowBits - the low 32-bits.
	     * @param highBits - the high 32-bits.
	     */
	    Timestamp.fromBits = function (lowBits, highBits) {
	        return new Timestamp(lowBits, highBits);
	    };
	    /**
	     * Returns a Timestamp from the given string, optionally using the given radix.
	     *
	     * @param str - the textual representation of the Timestamp.
	     * @param optRadix - the radix in which the text is written.
	     */
	    Timestamp.fromString = function (str, optRadix) {
	        return new Timestamp(Long.fromString(str, true, optRadix));
	    };
	    /** @internal */
	    Timestamp.prototype.toExtendedJSON = function () {
	        return { $timestamp: { t: this.high >>> 0, i: this.low >>> 0 } };
	    };
	    /** @internal */
	    Timestamp.fromExtendedJSON = function (doc) {
	        return new Timestamp(doc.$timestamp);
	    };
	    /** @internal */
	    Timestamp.prototype[Symbol.for('nodejs.util.inspect.custom')] = function () {
	        return this.inspect();
	    };
	    Timestamp.prototype.inspect = function () {
	        return "new Timestamp({ t: ".concat(this.getHighBits(), ", i: ").concat(this.getLowBits(), " })");
	    };
	    Timestamp.MAX_VALUE = Long.MAX_UNSIGNED_VALUE;
	    return Timestamp;
	}(LongWithoutOverridesClass));

	function isBSONType(value) {
	    return (isObjectLike(value) && Reflect.has(value, '_bsontype') && typeof value._bsontype === 'string');
	}
	// INT32 boundaries
	var BSON_INT32_MAX = 0x7fffffff;
	var BSON_INT32_MIN = -0x80000000;
	// INT64 boundaries
	// const BSON_INT64_MAX = 0x7fffffffffffffff; // TODO(NODE-4377): This number cannot be precisely represented in JS
	var BSON_INT64_MAX = 0x8000000000000000;
	var BSON_INT64_MIN = -0x8000000000000000;
	// all the types where we don't need to do any special processing and can just pass the EJSON
	//straight to type.fromExtendedJSON
	var keysToCodecs = {
	    $oid: ObjectId,
	    $binary: Binary,
	    $uuid: Binary,
	    $symbol: BSONSymbol,
	    $numberInt: Int32,
	    $numberDecimal: Decimal128,
	    $numberDouble: Double,
	    $numberLong: Long,
	    $minKey: MinKey,
	    $maxKey: MaxKey,
	    $regex: BSONRegExp,
	    $regularExpression: BSONRegExp,
	    $timestamp: Timestamp
	};
	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	function deserializeValue(value, options) {
	    if (options === void 0) { options = {}; }
	    if (typeof value === 'number') {
	        if (options.relaxed || options.legacy) {
	            return value;
	        }
	        // if it's an integer, should interpret as smallest BSON integer
	        // that can represent it exactly. (if out of range, interpret as double.)
	        if (Math.floor(value) === value) {
	            if (value >= BSON_INT32_MIN && value <= BSON_INT32_MAX)
	                return new Int32(value);
	            if (value >= BSON_INT64_MIN && value <= BSON_INT64_MAX)
	                return Long.fromNumber(value);
	        }
	        // If the number is a non-integer or out of integer range, should interpret as BSON Double.
	        return new Double(value);
	    }
	    // from here on out we're looking for bson types, so bail if its not an object
	    if (value == null || typeof value !== 'object')
	        return value;
	    // upgrade deprecated undefined to null
	    if (value.$undefined)
	        return null;
	    var keys = Object.keys(value).filter(function (k) { return k.startsWith('$') && value[k] != null; });
	    for (var i = 0; i < keys.length; i++) {
	        var c = keysToCodecs[keys[i]];
	        if (c)
	            return c.fromExtendedJSON(value, options);
	    }
	    if (value.$date != null) {
	        var d = value.$date;
	        var date = new Date();
	        if (options.legacy) {
	            if (typeof d === 'number')
	                date.setTime(d);
	            else if (typeof d === 'string')
	                date.setTime(Date.parse(d));
	        }
	        else {
	            if (typeof d === 'string')
	                date.setTime(Date.parse(d));
	            else if (Long.isLong(d))
	                date.setTime(d.toNumber());
	            else if (typeof d === 'number' && options.relaxed)
	                date.setTime(d);
	        }
	        return date;
	    }
	    if (value.$code != null) {
	        var copy = Object.assign({}, value);
	        if (value.$scope) {
	            copy.$scope = deserializeValue(value.$scope);
	        }
	        return Code.fromExtendedJSON(value);
	    }
	    if (isDBRefLike(value) || value.$dbPointer) {
	        var v = value.$ref ? value : value.$dbPointer;
	        // we run into this in a "degenerate EJSON" case (with $id and $ref order flipped)
	        // because of the order JSON.parse goes through the document
	        if (v instanceof DBRef)
	            return v;
	        var dollarKeys = Object.keys(v).filter(function (k) { return k.startsWith('$'); });
	        var valid_1 = true;
	        dollarKeys.forEach(function (k) {
	            if (['$ref', '$id', '$db'].indexOf(k) === -1)
	                valid_1 = false;
	        });
	        // only make DBRef if $ keys are all valid
	        if (valid_1)
	            return DBRef.fromExtendedJSON(v);
	    }
	    return value;
	}
	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	function serializeArray(array, options) {
	    return array.map(function (v, index) {
	        options.seenObjects.push({ propertyName: "index ".concat(index), obj: null });
	        try {
	            return serializeValue(v, options);
	        }
	        finally {
	            options.seenObjects.pop();
	        }
	    });
	}
	function getISOString(date) {
	    var isoStr = date.toISOString();
	    // we should only show milliseconds in timestamp if they're non-zero
	    return date.getUTCMilliseconds() !== 0 ? isoStr : isoStr.slice(0, -5) + 'Z';
	}
	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	function serializeValue(value, options) {
	    if ((typeof value === 'object' || typeof value === 'function') && value !== null) {
	        var index = options.seenObjects.findIndex(function (entry) { return entry.obj === value; });
	        if (index !== -1) {
	            var props = options.seenObjects.map(function (entry) { return entry.propertyName; });
	            var leadingPart = props
	                .slice(0, index)
	                .map(function (prop) { return "".concat(prop, " -> "); })
	                .join('');
	            var alreadySeen = props[index];
	            var circularPart = ' -> ' +
	                props
	                    .slice(index + 1, props.length - 1)
	                    .map(function (prop) { return "".concat(prop, " -> "); })
	                    .join('');
	            var current = props[props.length - 1];
	            var leadingSpace = ' '.repeat(leadingPart.length + alreadySeen.length / 2);
	            var dashes = '-'.repeat(circularPart.length + (alreadySeen.length + current.length) / 2 - 1);
	            throw new BSONTypeError('Converting circular structure to EJSON:\n' +
	                "    ".concat(leadingPart).concat(alreadySeen).concat(circularPart).concat(current, "\n") +
	                "    ".concat(leadingSpace, "\\").concat(dashes, "/"));
	        }
	        options.seenObjects[options.seenObjects.length - 1].obj = value;
	    }
	    if (Array.isArray(value))
	        return serializeArray(value, options);
	    if (value === undefined)
	        return null;
	    if (value instanceof Date || isDate(value)) {
	        var dateNum = value.getTime(), 
	        // is it in year range 1970-9999?
	        inRange = dateNum > -1 && dateNum < 253402318800000;
	        if (options.legacy) {
	            return options.relaxed && inRange
	                ? { $date: value.getTime() }
	                : { $date: getISOString(value) };
	        }
	        return options.relaxed && inRange
	            ? { $date: getISOString(value) }
	            : { $date: { $numberLong: value.getTime().toString() } };
	    }
	    if (typeof value === 'number' && (!options.relaxed || !isFinite(value))) {
	        // it's an integer
	        if (Math.floor(value) === value) {
	            var int32Range = value >= BSON_INT32_MIN && value <= BSON_INT32_MAX, int64Range = value >= BSON_INT64_MIN && value <= BSON_INT64_MAX;
	            // interpret as being of the smallest BSON integer type that can represent the number exactly
	            if (int32Range)
	                return { $numberInt: value.toString() };
	            if (int64Range)
	                return { $numberLong: value.toString() };
	        }
	        return { $numberDouble: value.toString() };
	    }
	    if (value instanceof RegExp || isRegExp(value)) {
	        var flags = value.flags;
	        if (flags === undefined) {
	            var match = value.toString().match(/[gimuy]*$/);
	            if (match) {
	                flags = match[0];
	            }
	        }
	        var rx = new BSONRegExp(value.source, flags);
	        return rx.toExtendedJSON(options);
	    }
	    if (value != null && typeof value === 'object')
	        return serializeDocument(value, options);
	    return value;
	}
	var BSON_TYPE_MAPPINGS = {
	    Binary: function (o) { return new Binary(o.value(), o.sub_type); },
	    Code: function (o) { return new Code(o.code, o.scope); },
	    DBRef: function (o) { return new DBRef(o.collection || o.namespace, o.oid, o.db, o.fields); },
	    Decimal128: function (o) { return new Decimal128(o.bytes); },
	    Double: function (o) { return new Double(o.value); },
	    Int32: function (o) { return new Int32(o.value); },
	    Long: function (o) {
	        return Long.fromBits(
	        // underscore variants for 1.x backwards compatibility
	        o.low != null ? o.low : o.low_, o.low != null ? o.high : o.high_, o.low != null ? o.unsigned : o.unsigned_);
	    },
	    MaxKey: function () { return new MaxKey(); },
	    MinKey: function () { return new MinKey(); },
	    ObjectID: function (o) { return new ObjectId(o); },
	    ObjectId: function (o) { return new ObjectId(o); },
	    BSONRegExp: function (o) { return new BSONRegExp(o.pattern, o.options); },
	    Symbol: function (o) { return new BSONSymbol(o.value); },
	    Timestamp: function (o) { return Timestamp.fromBits(o.low, o.high); }
	};
	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	function serializeDocument(doc, options) {
	    if (doc == null || typeof doc !== 'object')
	        throw new BSONError('not an object instance');
	    var bsontype = doc._bsontype;
	    if (typeof bsontype === 'undefined') {
	        // It's a regular object. Recursively serialize its property values.
	        var _doc = {};
	        for (var name in doc) {
	            options.seenObjects.push({ propertyName: name, obj: null });
	            try {
	                var value = serializeValue(doc[name], options);
	                if (name === '__proto__') {
	                    Object.defineProperty(_doc, name, {
	                        value: value,
	                        writable: true,
	                        enumerable: true,
	                        configurable: true
	                    });
	                }
	                else {
	                    _doc[name] = value;
	                }
	            }
	            finally {
	                options.seenObjects.pop();
	            }
	        }
	        return _doc;
	    }
	    else if (isBSONType(doc)) {
	        // the "document" is really just a BSON type object
	        // eslint-disable-next-line @typescript-eslint/no-explicit-any
	        var outDoc = doc;
	        if (typeof outDoc.toExtendedJSON !== 'function') {
	            // There's no EJSON serialization function on the object. It's probably an
	            // object created by a previous version of this library (or another library)
	            // that's duck-typing objects to look like they were generated by this library).
	            // Copy the object into this library's version of that type.
	            var mapper = BSON_TYPE_MAPPINGS[doc._bsontype];
	            if (!mapper) {
	                throw new BSONTypeError('Unrecognized or invalid _bsontype: ' + doc._bsontype);
	            }
	            outDoc = mapper(outDoc);
	        }
	        // Two BSON types may have nested objects that may need to be serialized too
	        if (bsontype === 'Code' && outDoc.scope) {
	            outDoc = new Code(outDoc.code, serializeValue(outDoc.scope, options));
	        }
	        else if (bsontype === 'DBRef' && outDoc.oid) {
	            outDoc = new DBRef(serializeValue(outDoc.collection, options), serializeValue(outDoc.oid, options), serializeValue(outDoc.db, options), serializeValue(outDoc.fields, options));
	        }
	        return outDoc.toExtendedJSON(options);
	    }
	    else {
	        throw new BSONError('_bsontype must be a string, but was: ' + typeof bsontype);
	    }
	}
	/**
	 * EJSON parse / stringify API
	 * @public
	 */
	// the namespace here is used to emulate `export * as EJSON from '...'`
	// which as of now (sept 2020) api-extractor does not support
	// eslint-disable-next-line @typescript-eslint/no-namespace
	exports.EJSON = void 0;
	(function (EJSON) {
	    /**
	     * Parse an Extended JSON string, constructing the JavaScript value or object described by that
	     * string.
	     *
	     * @example
	     * ```js
	     * const { EJSON } = require('bson');
	     * const text = '{ "int32": { "$numberInt": "10" } }';
	     *
	     * // prints { int32: { [String: '10'] _bsontype: 'Int32', value: '10' } }
	     * console.log(EJSON.parse(text, { relaxed: false }));
	     *
	     * // prints { int32: 10 }
	     * console.log(EJSON.parse(text));
	     * ```
	     */
	    function parse(text, options) {
	        var finalOptions = Object.assign({}, { relaxed: true, legacy: false }, options);
	        // relaxed implies not strict
	        if (typeof finalOptions.relaxed === 'boolean')
	            finalOptions.strict = !finalOptions.relaxed;
	        if (typeof finalOptions.strict === 'boolean')
	            finalOptions.relaxed = !finalOptions.strict;
	        return JSON.parse(text, function (key, value) {
	            if (key.indexOf('\x00') !== -1) {
	                throw new BSONError("BSON Document field names cannot contain null bytes, found: ".concat(JSON.stringify(key)));
	            }
	            return deserializeValue(value, finalOptions);
	        });
	    }
	    EJSON.parse = parse;
	    /**
	     * Converts a BSON document to an Extended JSON string, optionally replacing values if a replacer
	     * function is specified or optionally including only the specified properties if a replacer array
	     * is specified.
	     *
	     * @param value - The value to convert to extended JSON
	     * @param replacer - A function that alters the behavior of the stringification process, or an array of String and Number objects that serve as a whitelist for selecting/filtering the properties of the value object to be included in the JSON string. If this value is null or not provided, all properties of the object are included in the resulting JSON string
	     * @param space - A String or Number object that's used to insert white space into the output JSON string for readability purposes.
	     * @param options - Optional settings
	     *
	     * @example
	     * ```js
	     * const { EJSON } = require('bson');
	     * const Int32 = require('mongodb').Int32;
	     * const doc = { int32: new Int32(10) };
	     *
	     * // prints '{"int32":{"$numberInt":"10"}}'
	     * console.log(EJSON.stringify(doc, { relaxed: false }));
	     *
	     * // prints '{"int32":10}'
	     * console.log(EJSON.stringify(doc));
	     * ```
	     */
	    function stringify(value, 
	    // eslint-disable-next-line @typescript-eslint/no-explicit-any
	    replacer, space, options) {
	        if (space != null && typeof space === 'object') {
	            options = space;
	            space = 0;
	        }
	        if (replacer != null && typeof replacer === 'object' && !Array.isArray(replacer)) {
	            options = replacer;
	            replacer = undefined;
	            space = 0;
	        }
	        var serializeOptions = Object.assign({ relaxed: true, legacy: false }, options, {
	            seenObjects: [{ propertyName: '(root)', obj: null }]
	        });
	        var doc = serializeValue(value, serializeOptions);
	        return JSON.stringify(doc, replacer, space);
	    }
	    EJSON.stringify = stringify;
	    /**
	     * Serializes an object to an Extended JSON string, and reparse it as a JavaScript object.
	     *
	     * @param value - The object to serialize
	     * @param options - Optional settings passed to the `stringify` function
	     */
	    function serialize(value, options) {
	        options = options || {};
	        return JSON.parse(stringify(value, options));
	    }
	    EJSON.serialize = serialize;
	    /**
	     * Deserializes an Extended JSON object into a plain JavaScript object with native/BSON types
	     *
	     * @param ejson - The Extended JSON object to deserialize
	     * @param options - Optional settings passed to the parse method
	     */
	    function deserialize(ejson, options) {
	        options = options || {};
	        return parse(JSON.stringify(ejson), options);
	    }
	    EJSON.deserialize = deserialize;
	})(exports.EJSON || (exports.EJSON = {}));

	/* eslint-disable @typescript-eslint/no-explicit-any */
	/** @public */
	exports.Map = void 0;
	var bsonGlobal = getGlobal();
	if (bsonGlobal.Map) {
	    exports.Map = bsonGlobal.Map;
	}
	else {
	    // We will return a polyfill
	    exports.Map = /** @class */ (function () {
	        function Map(array) {
	            if (array === void 0) { array = []; }
	            this._keys = [];
	            this._values = {};
	            for (var i = 0; i < array.length; i++) {
	                if (array[i] == null)
	                    continue; // skip null and undefined
	                var entry = array[i];
	                var key = entry[0];
	                var value = entry[1];
	                // Add the key to the list of keys in order
	                this._keys.push(key);
	                // Add the key and value to the values dictionary with a point
	                // to the location in the ordered keys list
	                this._values[key] = { v: value, i: this._keys.length - 1 };
	            }
	        }
	        Map.prototype.clear = function () {
	            this._keys = [];
	            this._values = {};
	        };
	        Map.prototype.delete = function (key) {
	            var value = this._values[key];
	            if (value == null)
	                return false;
	            // Delete entry
	            delete this._values[key];
	            // Remove the key from the ordered keys list
	            this._keys.splice(value.i, 1);
	            return true;
	        };
	        Map.prototype.entries = function () {
	            var _this = this;
	            var index = 0;
	            return {
	                next: function () {
	                    var key = _this._keys[index++];
	                    return {
	                        value: key !== undefined ? [key, _this._values[key].v] : undefined,
	                        done: key !== undefined ? false : true
	                    };
	                }
	            };
	        };
	        Map.prototype.forEach = function (callback, self) {
	            self = self || this;
	            for (var i = 0; i < this._keys.length; i++) {
	                var key = this._keys[i];
	                // Call the forEach callback
	                callback.call(self, this._values[key].v, key, self);
	            }
	        };
	        Map.prototype.get = function (key) {
	            return this._values[key] ? this._values[key].v : undefined;
	        };
	        Map.prototype.has = function (key) {
	            return this._values[key] != null;
	        };
	        Map.prototype.keys = function () {
	            var _this = this;
	            var index = 0;
	            return {
	                next: function () {
	                    var key = _this._keys[index++];
	                    return {
	                        value: key !== undefined ? key : undefined,
	                        done: key !== undefined ? false : true
	                    };
	                }
	            };
	        };
	        Map.prototype.set = function (key, value) {
	            if (this._values[key]) {
	                this._values[key].v = value;
	                return this;
	            }
	            // Add the key to the list of keys in order
	            this._keys.push(key);
	            // Add the key and value to the values dictionary with a point
	            // to the location in the ordered keys list
	            this._values[key] = { v: value, i: this._keys.length - 1 };
	            return this;
	        };
	        Map.prototype.values = function () {
	            var _this = this;
	            var index = 0;
	            return {
	                next: function () {
	                    var key = _this._keys[index++];
	                    return {
	                        value: key !== undefined ? _this._values[key].v : undefined,
	                        done: key !== undefined ? false : true
	                    };
	                }
	            };
	        };
	        Object.defineProperty(Map.prototype, "size", {
	            get: function () {
	                return this._keys.length;
	            },
	            enumerable: false,
	            configurable: true
	        });
	        return Map;
	    }());
	}

	function calculateObjectSize$1(object, serializeFunctions, ignoreUndefined) {
	    var totalLength = 4 + 1;
	    if (Array.isArray(object)) {
	        for (var i = 0; i < object.length; i++) {
	            totalLength += calculateElement(i.toString(), object[i], serializeFunctions, true, ignoreUndefined);
	        }
	    }
	    else {
	        // If we have toBSON defined, override the current object
	        if (typeof (object === null || object === void 0 ? void 0 : object.toBSON) === 'function') {
	            object = object.toBSON();
	        }
	        // Calculate size
	        for (var key in object) {
	            totalLength += calculateElement(key, object[key], serializeFunctions, false, ignoreUndefined);
	        }
	    }
	    return totalLength;
	}
	/** @internal */
	function calculateElement(name, 
	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	value, serializeFunctions, isArray, ignoreUndefined) {
	    if (serializeFunctions === void 0) { serializeFunctions = false; }
	    if (isArray === void 0) { isArray = false; }
	    if (ignoreUndefined === void 0) { ignoreUndefined = false; }
	    // If we have toBSON defined, override the current object
	    if (typeof (value === null || value === void 0 ? void 0 : value.toBSON) === 'function') {
	        value = value.toBSON();
	    }
	    switch (typeof value) {
	        case 'string':
	            return 1 + buffer_1.byteLength(name, 'utf8') + 1 + 4 + buffer_1.byteLength(value, 'utf8') + 1;
	        case 'number':
	            if (Math.floor(value) === value &&
	                value >= JS_INT_MIN &&
	                value <= JS_INT_MAX) {
	                if (value >= BSON_INT32_MIN$1 && value <= BSON_INT32_MAX$1) {
	                    // 32 bit
	                    return (name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) + (4 + 1);
	                }
	                else {
	                    return (name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) + (8 + 1);
	                }
	            }
	            else {
	                // 64 bit
	                return (name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) + (8 + 1);
	            }
	        case 'undefined':
	            if (isArray || !ignoreUndefined)
	                return (name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) + 1;
	            return 0;
	        case 'boolean':
	            return (name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) + (1 + 1);
	        case 'object':
	            if (value == null || value['_bsontype'] === 'MinKey' || value['_bsontype'] === 'MaxKey') {
	                return (name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) + 1;
	            }
	            else if (value['_bsontype'] === 'ObjectId' || value['_bsontype'] === 'ObjectID') {
	                return (name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) + (12 + 1);
	            }
	            else if (value instanceof Date || isDate(value)) {
	                return (name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) + (8 + 1);
	            }
	            else if (ArrayBuffer.isView(value) ||
	                value instanceof ArrayBuffer ||
	                isAnyArrayBuffer(value)) {
	                return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) + (1 + 4 + 1) + value.byteLength);
	            }
	            else if (value['_bsontype'] === 'Long' ||
	                value['_bsontype'] === 'Double' ||
	                value['_bsontype'] === 'Timestamp') {
	                return (name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) + (8 + 1);
	            }
	            else if (value['_bsontype'] === 'Decimal128') {
	                return (name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) + (16 + 1);
	            }
	            else if (value['_bsontype'] === 'Code') {
	                // Calculate size depending on the availability of a scope
	                if (value.scope != null && Object.keys(value.scope).length > 0) {
	                    return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) +
	                        1 +
	                        4 +
	                        4 +
	                        buffer_1.byteLength(value.code.toString(), 'utf8') +
	                        1 +
	                        calculateObjectSize$1(value.scope, serializeFunctions, ignoreUndefined));
	                }
	                else {
	                    return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) +
	                        1 +
	                        4 +
	                        buffer_1.byteLength(value.code.toString(), 'utf8') +
	                        1);
	                }
	            }
	            else if (value['_bsontype'] === 'Binary') {
	                var binary = value;
	                // Check what kind of subtype we have
	                if (binary.sub_type === Binary.SUBTYPE_BYTE_ARRAY) {
	                    return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) +
	                        (binary.position + 1 + 4 + 1 + 4));
	                }
	                else {
	                    return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) + (binary.position + 1 + 4 + 1));
	                }
	            }
	            else if (value['_bsontype'] === 'Symbol') {
	                return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) +
	                    buffer_1.byteLength(value.value, 'utf8') +
	                    4 +
	                    1 +
	                    1);
	            }
	            else if (value['_bsontype'] === 'DBRef') {
	                // Set up correct object for serialization
	                var ordered_values = Object.assign({
	                    $ref: value.collection,
	                    $id: value.oid
	                }, value.fields);
	                // Add db reference if it exists
	                if (value.db != null) {
	                    ordered_values['$db'] = value.db;
	                }
	                return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) +
	                    1 +
	                    calculateObjectSize$1(ordered_values, serializeFunctions, ignoreUndefined));
	            }
	            else if (value instanceof RegExp || isRegExp(value)) {
	                return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) +
	                    1 +
	                    buffer_1.byteLength(value.source, 'utf8') +
	                    1 +
	                    (value.global ? 1 : 0) +
	                    (value.ignoreCase ? 1 : 0) +
	                    (value.multiline ? 1 : 0) +
	                    1);
	            }
	            else if (value['_bsontype'] === 'BSONRegExp') {
	                return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) +
	                    1 +
	                    buffer_1.byteLength(value.pattern, 'utf8') +
	                    1 +
	                    buffer_1.byteLength(value.options, 'utf8') +
	                    1);
	            }
	            else {
	                return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) +
	                    calculateObjectSize$1(value, serializeFunctions, ignoreUndefined) +
	                    1);
	            }
	        case 'function':
	            // WTF for 0.4.X where typeof /someregexp/ === 'function'
	            if (value instanceof RegExp || isRegExp(value) || String.call(value) === '[object RegExp]') {
	                return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) +
	                    1 +
	                    buffer_1.byteLength(value.source, 'utf8') +
	                    1 +
	                    (value.global ? 1 : 0) +
	                    (value.ignoreCase ? 1 : 0) +
	                    (value.multiline ? 1 : 0) +
	                    1);
	            }
	            else {
	                if (serializeFunctions && value.scope != null && Object.keys(value.scope).length > 0) {
	                    return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) +
	                        1 +
	                        4 +
	                        4 +
	                        buffer_1.byteLength(normalizedFunctionString(value), 'utf8') +
	                        1 +
	                        calculateObjectSize$1(value.scope, serializeFunctions, ignoreUndefined));
	                }
	                else if (serializeFunctions) {
	                    return ((name != null ? buffer_1.byteLength(name, 'utf8') + 1 : 0) +
	                        1 +
	                        4 +
	                        buffer_1.byteLength(normalizedFunctionString(value), 'utf8') +
	                        1);
	                }
	            }
	    }
	    return 0;
	}

	var FIRST_BIT = 0x80;
	var FIRST_TWO_BITS = 0xc0;
	var FIRST_THREE_BITS = 0xe0;
	var FIRST_FOUR_BITS = 0xf0;
	var FIRST_FIVE_BITS = 0xf8;
	var TWO_BIT_CHAR = 0xc0;
	var THREE_BIT_CHAR = 0xe0;
	var FOUR_BIT_CHAR = 0xf0;
	var CONTINUING_CHAR = 0x80;
	/**
	 * Determines if the passed in bytes are valid utf8
	 * @param bytes - An array of 8-bit bytes. Must be indexable and have length property
	 * @param start - The index to start validating
	 * @param end - The index to end validating
	 */
	function validateUtf8(bytes, start, end) {
	    var continuation = 0;
	    for (var i = start; i < end; i += 1) {
	        var byte = bytes[i];
	        if (continuation) {
	            if ((byte & FIRST_TWO_BITS) !== CONTINUING_CHAR) {
	                return false;
	            }
	            continuation -= 1;
	        }
	        else if (byte & FIRST_BIT) {
	            if ((byte & FIRST_THREE_BITS) === TWO_BIT_CHAR) {
	                continuation = 1;
	            }
	            else if ((byte & FIRST_FOUR_BITS) === THREE_BIT_CHAR) {
	                continuation = 2;
	            }
	            else if ((byte & FIRST_FIVE_BITS) === FOUR_BIT_CHAR) {
	                continuation = 3;
	            }
	            else {
	                return false;
	            }
	        }
	    }
	    return !continuation;
	}

	// Internal long versions
	var JS_INT_MAX_LONG = Long.fromNumber(JS_INT_MAX);
	var JS_INT_MIN_LONG = Long.fromNumber(JS_INT_MIN);
	var functionCache = {};
	function deserialize$1(buffer, options, isArray) {
	    options = options == null ? {} : options;
	    var index = options && options.index ? options.index : 0;
	    // Read the document size
	    var size = buffer[index] |
	        (buffer[index + 1] << 8) |
	        (buffer[index + 2] << 16) |
	        (buffer[index + 3] << 24);
	    if (size < 5) {
	        throw new BSONError("bson size must be >= 5, is ".concat(size));
	    }
	    if (options.allowObjectSmallerThanBufferSize && buffer.length < size) {
	        throw new BSONError("buffer length ".concat(buffer.length, " must be >= bson size ").concat(size));
	    }
	    if (!options.allowObjectSmallerThanBufferSize && buffer.length !== size) {
	        throw new BSONError("buffer length ".concat(buffer.length, " must === bson size ").concat(size));
	    }
	    if (size + index > buffer.byteLength) {
	        throw new BSONError("(bson size ".concat(size, " + options.index ").concat(index, " must be <= buffer length ").concat(buffer.byteLength, ")"));
	    }
	    // Illegal end value
	    if (buffer[index + size - 1] !== 0) {
	        throw new BSONError("One object, sized correctly, with a spot for an EOO, but the EOO isn't 0x00");
	    }
	    // Start deserializtion
	    return deserializeObject(buffer, index, options, isArray);
	}
	var allowedDBRefKeys = /^\$ref$|^\$id$|^\$db$/;
	function deserializeObject(buffer, index, options, isArray) {
	    if (isArray === void 0) { isArray = false; }
	    var evalFunctions = options['evalFunctions'] == null ? false : options['evalFunctions'];
	    var cacheFunctions = options['cacheFunctions'] == null ? false : options['cacheFunctions'];
	    var fieldsAsRaw = options['fieldsAsRaw'] == null ? null : options['fieldsAsRaw'];
	    // Return raw bson buffer instead of parsing it
	    var raw = options['raw'] == null ? false : options['raw'];
	    // Return BSONRegExp objects instead of native regular expressions
	    var bsonRegExp = typeof options['bsonRegExp'] === 'boolean' ? options['bsonRegExp'] : false;
	    // Controls the promotion of values vs wrapper classes
	    var promoteBuffers = options['promoteBuffers'] == null ? false : options['promoteBuffers'];
	    var promoteLongs = options['promoteLongs'] == null ? true : options['promoteLongs'];
	    var promoteValues = options['promoteValues'] == null ? true : options['promoteValues'];
	    // Ensures default validation option if none given
	    var validation = options.validation == null ? { utf8: true } : options.validation;
	    // Shows if global utf-8 validation is enabled or disabled
	    var globalUTFValidation = true;
	    // Reflects utf-8 validation setting regardless of global or specific key validation
	    var validationSetting;
	    // Set of keys either to enable or disable validation on
	    var utf8KeysSet = new Set();
	    // Check for boolean uniformity and empty validation option
	    var utf8ValidatedKeys = validation.utf8;
	    if (typeof utf8ValidatedKeys === 'boolean') {
	        validationSetting = utf8ValidatedKeys;
	    }
	    else {
	        globalUTFValidation = false;
	        var utf8ValidationValues = Object.keys(utf8ValidatedKeys).map(function (key) {
	            return utf8ValidatedKeys[key];
	        });
	        if (utf8ValidationValues.length === 0) {
	            throw new BSONError('UTF-8 validation setting cannot be empty');
	        }
	        if (typeof utf8ValidationValues[0] !== 'boolean') {
	            throw new BSONError('Invalid UTF-8 validation option, must specify boolean values');
	        }
	        validationSetting = utf8ValidationValues[0];
	        // Ensures boolean uniformity in utf-8 validation (all true or all false)
	        if (!utf8ValidationValues.every(function (item) { return item === validationSetting; })) {
	            throw new BSONError('Invalid UTF-8 validation option - keys must be all true or all false');
	        }
	    }
	    // Add keys to set that will either be validated or not based on validationSetting
	    if (!globalUTFValidation) {
	        for (var _i = 0, _a = Object.keys(utf8ValidatedKeys); _i < _a.length; _i++) {
	            var key = _a[_i];
	            utf8KeysSet.add(key);
	        }
	    }
	    // Set the start index
	    var startIndex = index;
	    // Validate that we have at least 4 bytes of buffer
	    if (buffer.length < 5)
	        throw new BSONError('corrupt bson message < 5 bytes long');
	    // Read the document size
	    var size = buffer[index++] | (buffer[index++] << 8) | (buffer[index++] << 16) | (buffer[index++] << 24);
	    // Ensure buffer is valid size
	    if (size < 5 || size > buffer.length)
	        throw new BSONError('corrupt bson message');
	    // Create holding object
	    var object = isArray ? [] : {};
	    // Used for arrays to skip having to perform utf8 decoding
	    var arrayIndex = 0;
	    var done = false;
	    var isPossibleDBRef = isArray ? false : null;
	    // While we have more left data left keep parsing
	    var dataview = new DataView(buffer.buffer, buffer.byteOffset, buffer.byteLength);
	    while (!done) {
	        // Read the type
	        var elementType = buffer[index++];
	        // If we get a zero it's the last byte, exit
	        if (elementType === 0)
	            break;
	        // Get the start search index
	        var i = index;
	        // Locate the end of the c string
	        while (buffer[i] !== 0x00 && i < buffer.length) {
	            i++;
	        }
	        // If are at the end of the buffer there is a problem with the document
	        if (i >= buffer.byteLength)
	            throw new BSONError('Bad BSON Document: illegal CString');
	        // Represents the key
	        var name = isArray ? arrayIndex++ : buffer.toString('utf8', index, i);
	        // shouldValidateKey is true if the key should be validated, false otherwise
	        var shouldValidateKey = true;
	        if (globalUTFValidation || utf8KeysSet.has(name)) {
	            shouldValidateKey = validationSetting;
	        }
	        else {
	            shouldValidateKey = !validationSetting;
	        }
	        if (isPossibleDBRef !== false && name[0] === '$') {
	            isPossibleDBRef = allowedDBRefKeys.test(name);
	        }
	        var value = void 0;
	        index = i + 1;
	        if (elementType === BSON_DATA_STRING) {
	            var stringSize = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            if (stringSize <= 0 ||
	                stringSize > buffer.length - index ||
	                buffer[index + stringSize - 1] !== 0) {
	                throw new BSONError('bad string length in bson');
	            }
	            value = getValidatedString(buffer, index, index + stringSize - 1, shouldValidateKey);
	            index = index + stringSize;
	        }
	        else if (elementType === BSON_DATA_OID) {
	            var oid = buffer_1.alloc(12);
	            buffer.copy(oid, 0, index, index + 12);
	            value = new ObjectId(oid);
	            index = index + 12;
	        }
	        else if (elementType === BSON_DATA_INT && promoteValues === false) {
	            value = new Int32(buffer[index++] | (buffer[index++] << 8) | (buffer[index++] << 16) | (buffer[index++] << 24));
	        }
	        else if (elementType === BSON_DATA_INT) {
	            value =
	                buffer[index++] |
	                    (buffer[index++] << 8) |
	                    (buffer[index++] << 16) |
	                    (buffer[index++] << 24);
	        }
	        else if (elementType === BSON_DATA_NUMBER && promoteValues === false) {
	            value = new Double(dataview.getFloat64(index, true));
	            index = index + 8;
	        }
	        else if (elementType === BSON_DATA_NUMBER) {
	            value = dataview.getFloat64(index, true);
	            index = index + 8;
	        }
	        else if (elementType === BSON_DATA_DATE) {
	            var lowBits = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            var highBits = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            value = new Date(new Long(lowBits, highBits).toNumber());
	        }
	        else if (elementType === BSON_DATA_BOOLEAN) {
	            if (buffer[index] !== 0 && buffer[index] !== 1)
	                throw new BSONError('illegal boolean type value');
	            value = buffer[index++] === 1;
	        }
	        else if (elementType === BSON_DATA_OBJECT) {
	            var _index = index;
	            var objectSize = buffer[index] |
	                (buffer[index + 1] << 8) |
	                (buffer[index + 2] << 16) |
	                (buffer[index + 3] << 24);
	            if (objectSize <= 0 || objectSize > buffer.length - index)
	                throw new BSONError('bad embedded document length in bson');
	            // We have a raw value
	            if (raw) {
	                value = buffer.slice(index, index + objectSize);
	            }
	            else {
	                var objectOptions = options;
	                if (!globalUTFValidation) {
	                    objectOptions = _assign(_assign({}, options), { validation: { utf8: shouldValidateKey } });
	                }
	                value = deserializeObject(buffer, _index, objectOptions, false);
	            }
	            index = index + objectSize;
	        }
	        else if (elementType === BSON_DATA_ARRAY) {
	            var _index = index;
	            var objectSize = buffer[index] |
	                (buffer[index + 1] << 8) |
	                (buffer[index + 2] << 16) |
	                (buffer[index + 3] << 24);
	            var arrayOptions = options;
	            // Stop index
	            var stopIndex = index + objectSize;
	            // All elements of array to be returned as raw bson
	            if (fieldsAsRaw && fieldsAsRaw[name]) {
	                arrayOptions = {};
	                for (var n in options) {
	                    arrayOptions[n] = options[n];
	                }
	                arrayOptions['raw'] = true;
	            }
	            if (!globalUTFValidation) {
	                arrayOptions = _assign(_assign({}, arrayOptions), { validation: { utf8: shouldValidateKey } });
	            }
	            value = deserializeObject(buffer, _index, arrayOptions, true);
	            index = index + objectSize;
	            if (buffer[index - 1] !== 0)
	                throw new BSONError('invalid array terminator byte');
	            if (index !== stopIndex)
	                throw new BSONError('corrupted array bson');
	        }
	        else if (elementType === BSON_DATA_UNDEFINED) {
	            value = undefined;
	        }
	        else if (elementType === BSON_DATA_NULL) {
	            value = null;
	        }
	        else if (elementType === BSON_DATA_LONG) {
	            // Unpack the low and high bits
	            var lowBits = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            var highBits = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            var long = new Long(lowBits, highBits);
	            // Promote the long if possible
	            if (promoteLongs && promoteValues === true) {
	                value =
	                    long.lessThanOrEqual(JS_INT_MAX_LONG) && long.greaterThanOrEqual(JS_INT_MIN_LONG)
	                        ? long.toNumber()
	                        : long;
	            }
	            else {
	                value = long;
	            }
	        }
	        else if (elementType === BSON_DATA_DECIMAL128) {
	            // Buffer to contain the decimal bytes
	            var bytes = buffer_1.alloc(16);
	            // Copy the next 16 bytes into the bytes buffer
	            buffer.copy(bytes, 0, index, index + 16);
	            // Update index
	            index = index + 16;
	            // Assign the new Decimal128 value
	            var decimal128 = new Decimal128(bytes);
	            // If we have an alternative mapper use that
	            if ('toObject' in decimal128 && typeof decimal128.toObject === 'function') {
	                value = decimal128.toObject();
	            }
	            else {
	                value = decimal128;
	            }
	        }
	        else if (elementType === BSON_DATA_BINARY) {
	            var binarySize = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            var totalBinarySize = binarySize;
	            var subType = buffer[index++];
	            // Did we have a negative binary size, throw
	            if (binarySize < 0)
	                throw new BSONError('Negative binary type element size found');
	            // Is the length longer than the document
	            if (binarySize > buffer.byteLength)
	                throw new BSONError('Binary type size larger than document size');
	            // Decode as raw Buffer object if options specifies it
	            if (buffer['slice'] != null) {
	                // If we have subtype 2 skip the 4 bytes for the size
	                if (subType === Binary.SUBTYPE_BYTE_ARRAY) {
	                    binarySize =
	                        buffer[index++] |
	                            (buffer[index++] << 8) |
	                            (buffer[index++] << 16) |
	                            (buffer[index++] << 24);
	                    if (binarySize < 0)
	                        throw new BSONError('Negative binary type element size found for subtype 0x02');
	                    if (binarySize > totalBinarySize - 4)
	                        throw new BSONError('Binary type with subtype 0x02 contains too long binary size');
	                    if (binarySize < totalBinarySize - 4)
	                        throw new BSONError('Binary type with subtype 0x02 contains too short binary size');
	                }
	                if (promoteBuffers && promoteValues) {
	                    value = buffer.slice(index, index + binarySize);
	                }
	                else {
	                    value = new Binary(buffer.slice(index, index + binarySize), subType);
	                    if (subType === BSON_BINARY_SUBTYPE_UUID_NEW) {
	                        value = value.toUUID();
	                    }
	                }
	            }
	            else {
	                var _buffer = buffer_1.alloc(binarySize);
	                // If we have subtype 2 skip the 4 bytes for the size
	                if (subType === Binary.SUBTYPE_BYTE_ARRAY) {
	                    binarySize =
	                        buffer[index++] |
	                            (buffer[index++] << 8) |
	                            (buffer[index++] << 16) |
	                            (buffer[index++] << 24);
	                    if (binarySize < 0)
	                        throw new BSONError('Negative binary type element size found for subtype 0x02');
	                    if (binarySize > totalBinarySize - 4)
	                        throw new BSONError('Binary type with subtype 0x02 contains too long binary size');
	                    if (binarySize < totalBinarySize - 4)
	                        throw new BSONError('Binary type with subtype 0x02 contains too short binary size');
	                }
	                // Copy the data
	                for (i = 0; i < binarySize; i++) {
	                    _buffer[i] = buffer[index + i];
	                }
	                if (promoteBuffers && promoteValues) {
	                    value = _buffer;
	                }
	                else if (subType === BSON_BINARY_SUBTYPE_UUID_NEW) {
	                    value = new Binary(buffer.slice(index, index + binarySize), subType).toUUID();
	                }
	                else {
	                    value = new Binary(buffer.slice(index, index + binarySize), subType);
	                }
	            }
	            // Update the index
	            index = index + binarySize;
	        }
	        else if (elementType === BSON_DATA_REGEXP && bsonRegExp === false) {
	            // Get the start search index
	            i = index;
	            // Locate the end of the c string
	            while (buffer[i] !== 0x00 && i < buffer.length) {
	                i++;
	            }
	            // If are at the end of the buffer there is a problem with the document
	            if (i >= buffer.length)
	                throw new BSONError('Bad BSON Document: illegal CString');
	            // Return the C string
	            var source = buffer.toString('utf8', index, i);
	            // Create the regexp
	            index = i + 1;
	            // Get the start search index
	            i = index;
	            // Locate the end of the c string
	            while (buffer[i] !== 0x00 && i < buffer.length) {
	                i++;
	            }
	            // If are at the end of the buffer there is a problem with the document
	            if (i >= buffer.length)
	                throw new BSONError('Bad BSON Document: illegal CString');
	            // Return the C string
	            var regExpOptions = buffer.toString('utf8', index, i);
	            index = i + 1;
	            // For each option add the corresponding one for javascript
	            var optionsArray = new Array(regExpOptions.length);
	            // Parse options
	            for (i = 0; i < regExpOptions.length; i++) {
	                switch (regExpOptions[i]) {
	                    case 'm':
	                        optionsArray[i] = 'm';
	                        break;
	                    case 's':
	                        optionsArray[i] = 'g';
	                        break;
	                    case 'i':
	                        optionsArray[i] = 'i';
	                        break;
	                }
	            }
	            value = new RegExp(source, optionsArray.join(''));
	        }
	        else if (elementType === BSON_DATA_REGEXP && bsonRegExp === true) {
	            // Get the start search index
	            i = index;
	            // Locate the end of the c string
	            while (buffer[i] !== 0x00 && i < buffer.length) {
	                i++;
	            }
	            // If are at the end of the buffer there is a problem with the document
	            if (i >= buffer.length)
	                throw new BSONError('Bad BSON Document: illegal CString');
	            // Return the C string
	            var source = buffer.toString('utf8', index, i);
	            index = i + 1;
	            // Get the start search index
	            i = index;
	            // Locate the end of the c string
	            while (buffer[i] !== 0x00 && i < buffer.length) {
	                i++;
	            }
	            // If are at the end of the buffer there is a problem with the document
	            if (i >= buffer.length)
	                throw new BSONError('Bad BSON Document: illegal CString');
	            // Return the C string
	            var regExpOptions = buffer.toString('utf8', index, i);
	            index = i + 1;
	            // Set the object
	            value = new BSONRegExp(source, regExpOptions);
	        }
	        else if (elementType === BSON_DATA_SYMBOL) {
	            var stringSize = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            if (stringSize <= 0 ||
	                stringSize > buffer.length - index ||
	                buffer[index + stringSize - 1] !== 0) {
	                throw new BSONError('bad string length in bson');
	            }
	            var symbol = getValidatedString(buffer, index, index + stringSize - 1, shouldValidateKey);
	            value = promoteValues ? symbol : new BSONSymbol(symbol);
	            index = index + stringSize;
	        }
	        else if (elementType === BSON_DATA_TIMESTAMP) {
	            var lowBits = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            var highBits = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            value = new Timestamp(lowBits, highBits);
	        }
	        else if (elementType === BSON_DATA_MIN_KEY) {
	            value = new MinKey();
	        }
	        else if (elementType === BSON_DATA_MAX_KEY) {
	            value = new MaxKey();
	        }
	        else if (elementType === BSON_DATA_CODE) {
	            var stringSize = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            if (stringSize <= 0 ||
	                stringSize > buffer.length - index ||
	                buffer[index + stringSize - 1] !== 0) {
	                throw new BSONError('bad string length in bson');
	            }
	            var functionString = getValidatedString(buffer, index, index + stringSize - 1, shouldValidateKey);
	            // If we are evaluating the functions
	            if (evalFunctions) {
	                // If we have cache enabled let's look for the md5 of the function in the cache
	                if (cacheFunctions) {
	                    // Got to do this to avoid V8 deoptimizing the call due to finding eval
	                    value = isolateEval(functionString, functionCache, object);
	                }
	                else {
	                    value = isolateEval(functionString);
	                }
	            }
	            else {
	                value = new Code(functionString);
	            }
	            // Update parse index position
	            index = index + stringSize;
	        }
	        else if (elementType === BSON_DATA_CODE_W_SCOPE) {
	            var totalSize = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            // Element cannot be shorter than totalSize + stringSize + documentSize + terminator
	            if (totalSize < 4 + 4 + 4 + 1) {
	                throw new BSONError('code_w_scope total size shorter minimum expected length');
	            }
	            // Get the code string size
	            var stringSize = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            // Check if we have a valid string
	            if (stringSize <= 0 ||
	                stringSize > buffer.length - index ||
	                buffer[index + stringSize - 1] !== 0) {
	                throw new BSONError('bad string length in bson');
	            }
	            // Javascript function
	            var functionString = getValidatedString(buffer, index, index + stringSize - 1, shouldValidateKey);
	            // Update parse index position
	            index = index + stringSize;
	            // Parse the element
	            var _index = index;
	            // Decode the size of the object document
	            var objectSize = buffer[index] |
	                (buffer[index + 1] << 8) |
	                (buffer[index + 2] << 16) |
	                (buffer[index + 3] << 24);
	            // Decode the scope object
	            var scopeObject = deserializeObject(buffer, _index, options, false);
	            // Adjust the index
	            index = index + objectSize;
	            // Check if field length is too short
	            if (totalSize < 4 + 4 + objectSize + stringSize) {
	                throw new BSONError('code_w_scope total size is too short, truncating scope');
	            }
	            // Check if totalSize field is too long
	            if (totalSize > 4 + 4 + objectSize + stringSize) {
	                throw new BSONError('code_w_scope total size is too long, clips outer document');
	            }
	            // If we are evaluating the functions
	            if (evalFunctions) {
	                // If we have cache enabled let's look for the md5 of the function in the cache
	                if (cacheFunctions) {
	                    // Got to do this to avoid V8 deoptimizing the call due to finding eval
	                    value = isolateEval(functionString, functionCache, object);
	                }
	                else {
	                    value = isolateEval(functionString);
	                }
	                value.scope = scopeObject;
	            }
	            else {
	                value = new Code(functionString, scopeObject);
	            }
	        }
	        else if (elementType === BSON_DATA_DBPOINTER) {
	            // Get the code string size
	            var stringSize = buffer[index++] |
	                (buffer[index++] << 8) |
	                (buffer[index++] << 16) |
	                (buffer[index++] << 24);
	            // Check if we have a valid string
	            if (stringSize <= 0 ||
	                stringSize > buffer.length - index ||
	                buffer[index + stringSize - 1] !== 0)
	                throw new BSONError('bad string length in bson');
	            // Namespace
	            if (validation != null && validation.utf8) {
	                if (!validateUtf8(buffer, index, index + stringSize - 1)) {
	                    throw new BSONError('Invalid UTF-8 string in BSON document');
	                }
	            }
	            var namespace = buffer.toString('utf8', index, index + stringSize - 1);
	            // Update parse index position
	            index = index + stringSize;
	            // Read the oid
	            var oidBuffer = buffer_1.alloc(12);
	            buffer.copy(oidBuffer, 0, index, index + 12);
	            var oid = new ObjectId(oidBuffer);
	            // Update the index
	            index = index + 12;
	            // Upgrade to DBRef type
	            value = new DBRef(namespace, oid);
	        }
	        else {
	            throw new BSONError("Detected unknown BSON type ".concat(elementType.toString(16), " for fieldname \"").concat(name, "\""));
	        }
	        if (name === '__proto__') {
	            Object.defineProperty(object, name, {
	                value: value,
	                writable: true,
	                enumerable: true,
	                configurable: true
	            });
	        }
	        else {
	            object[name] = value;
	        }
	    }
	    // Check if the deserialization was against a valid array/object
	    if (size !== index - startIndex) {
	        if (isArray)
	            throw new BSONError('corrupt array bson');
	        throw new BSONError('corrupt object bson');
	    }
	    // if we did not find "$ref", "$id", "$db", or found an extraneous $key, don't make a DBRef
	    if (!isPossibleDBRef)
	        return object;
	    if (isDBRefLike(object)) {
	        var copy = Object.assign({}, object);
	        delete copy.$ref;
	        delete copy.$id;
	        delete copy.$db;
	        return new DBRef(object.$ref, object.$id, object.$db, copy);
	    }
	    return object;
	}
	/**
	 * Ensure eval is isolated, store the result in functionCache.
	 *
	 * @internal
	 */
	function isolateEval(functionString, functionCache, object) {
	    // eslint-disable-next-line @typescript-eslint/no-implied-eval
	    if (!functionCache)
	        return new Function(functionString);
	    // Check for cache hit, eval if missing and return cached function
	    if (functionCache[functionString] == null) {
	        // eslint-disable-next-line @typescript-eslint/no-implied-eval
	        functionCache[functionString] = new Function(functionString);
	    }
	    // Set the object
	    return functionCache[functionString].bind(object);
	}
	function getValidatedString(buffer, start, end, shouldValidateUtf8) {
	    var value = buffer.toString('utf8', start, end);
	    // if utf8 validation is on, do the check
	    if (shouldValidateUtf8) {
	        for (var i = 0; i < value.length; i++) {
	            if (value.charCodeAt(i) === 0xfffd) {
	                if (!validateUtf8(buffer, start, end)) {
	                    throw new BSONError('Invalid UTF-8 string in BSON document');
	                }
	                break;
	            }
	        }
	    }
	    return value;
	}

	var regexp = /\x00/; // eslint-disable-line no-control-regex
	var ignoreKeys = new Set(['$db', '$ref', '$id', '$clusterTime']);
	/*
	 * isArray indicates if we are writing to a BSON array (type 0x04)
	 * which forces the "key" which really an array index as a string to be written as ascii
	 * This will catch any errors in index as a string generation
	 */
	function serializeString(buffer, key, value, index, isArray) {
	    // Encode String type
	    buffer[index++] = BSON_DATA_STRING;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes + 1;
	    buffer[index - 1] = 0;
	    // Write the string
	    var size = buffer.write(value, index + 4, undefined, 'utf8');
	    // Write the size of the string to buffer
	    buffer[index + 3] = ((size + 1) >> 24) & 0xff;
	    buffer[index + 2] = ((size + 1) >> 16) & 0xff;
	    buffer[index + 1] = ((size + 1) >> 8) & 0xff;
	    buffer[index] = (size + 1) & 0xff;
	    // Update index
	    index = index + 4 + size;
	    // Write zero
	    buffer[index++] = 0;
	    return index;
	}
	var SPACE_FOR_FLOAT64 = new Uint8Array(8);
	var DV_FOR_FLOAT64 = new DataView(SPACE_FOR_FLOAT64.buffer, SPACE_FOR_FLOAT64.byteOffset, SPACE_FOR_FLOAT64.byteLength);
	function serializeNumber(buffer, key, value, index, isArray) {
	    // We have an integer value
	    // TODO(NODE-2529): Add support for big int
	    if (Number.isInteger(value) &&
	        value >= BSON_INT32_MIN$1 &&
	        value <= BSON_INT32_MAX$1) {
	        // If the value fits in 32 bits encode as int32
	        // Set int type 32 bits or less
	        buffer[index++] = BSON_DATA_INT;
	        // Number of written bytes
	        var numberOfWrittenBytes = !isArray
	            ? buffer.write(key, index, undefined, 'utf8')
	            : buffer.write(key, index, undefined, 'ascii');
	        // Encode the name
	        index = index + numberOfWrittenBytes;
	        buffer[index++] = 0;
	        // Write the int value
	        buffer[index++] = value & 0xff;
	        buffer[index++] = (value >> 8) & 0xff;
	        buffer[index++] = (value >> 16) & 0xff;
	        buffer[index++] = (value >> 24) & 0xff;
	    }
	    else {
	        // Encode as double
	        buffer[index++] = BSON_DATA_NUMBER;
	        // Number of written bytes
	        var numberOfWrittenBytes = !isArray
	            ? buffer.write(key, index, undefined, 'utf8')
	            : buffer.write(key, index, undefined, 'ascii');
	        // Encode the name
	        index = index + numberOfWrittenBytes;
	        buffer[index++] = 0;
	        // Write float
	        DV_FOR_FLOAT64.setFloat64(0, value, true);
	        buffer.set(SPACE_FOR_FLOAT64, index);
	        // Adjust index
	        index = index + 8;
	    }
	    return index;
	}
	function serializeNull(buffer, key, _, index, isArray) {
	    // Set long type
	    buffer[index++] = BSON_DATA_NULL;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    return index;
	}
	function serializeBoolean(buffer, key, value, index, isArray) {
	    // Write the type
	    buffer[index++] = BSON_DATA_BOOLEAN;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    // Encode the boolean value
	    buffer[index++] = value ? 1 : 0;
	    return index;
	}
	function serializeDate(buffer, key, value, index, isArray) {
	    // Write the type
	    buffer[index++] = BSON_DATA_DATE;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    // Write the date
	    var dateInMilis = Long.fromNumber(value.getTime());
	    var lowBits = dateInMilis.getLowBits();
	    var highBits = dateInMilis.getHighBits();
	    // Encode low bits
	    buffer[index++] = lowBits & 0xff;
	    buffer[index++] = (lowBits >> 8) & 0xff;
	    buffer[index++] = (lowBits >> 16) & 0xff;
	    buffer[index++] = (lowBits >> 24) & 0xff;
	    // Encode high bits
	    buffer[index++] = highBits & 0xff;
	    buffer[index++] = (highBits >> 8) & 0xff;
	    buffer[index++] = (highBits >> 16) & 0xff;
	    buffer[index++] = (highBits >> 24) & 0xff;
	    return index;
	}
	function serializeRegExp(buffer, key, value, index, isArray) {
	    // Write the type
	    buffer[index++] = BSON_DATA_REGEXP;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    if (value.source && value.source.match(regexp) != null) {
	        throw Error('value ' + value.source + ' must not contain null bytes');
	    }
	    // Adjust the index
	    index = index + buffer.write(value.source, index, undefined, 'utf8');
	    // Write zero
	    buffer[index++] = 0x00;
	    // Write the parameters
	    if (value.ignoreCase)
	        buffer[index++] = 0x69; // i
	    if (value.global)
	        buffer[index++] = 0x73; // s
	    if (value.multiline)
	        buffer[index++] = 0x6d; // m
	    // Add ending zero
	    buffer[index++] = 0x00;
	    return index;
	}
	function serializeBSONRegExp(buffer, key, value, index, isArray) {
	    // Write the type
	    buffer[index++] = BSON_DATA_REGEXP;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    // Check the pattern for 0 bytes
	    if (value.pattern.match(regexp) != null) {
	        // The BSON spec doesn't allow keys with null bytes because keys are
	        // null-terminated.
	        throw Error('pattern ' + value.pattern + ' must not contain null bytes');
	    }
	    // Adjust the index
	    index = index + buffer.write(value.pattern, index, undefined, 'utf8');
	    // Write zero
	    buffer[index++] = 0x00;
	    // Write the options
	    index = index + buffer.write(value.options.split('').sort().join(''), index, undefined, 'utf8');
	    // Add ending zero
	    buffer[index++] = 0x00;
	    return index;
	}
	function serializeMinMax(buffer, key, value, index, isArray) {
	    // Write the type of either min or max key
	    if (value === null) {
	        buffer[index++] = BSON_DATA_NULL;
	    }
	    else if (value._bsontype === 'MinKey') {
	        buffer[index++] = BSON_DATA_MIN_KEY;
	    }
	    else {
	        buffer[index++] = BSON_DATA_MAX_KEY;
	    }
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    return index;
	}
	function serializeObjectId(buffer, key, value, index, isArray) {
	    // Write the type
	    buffer[index++] = BSON_DATA_OID;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    // Write the objectId into the shared buffer
	    if (typeof value.id === 'string') {
	        buffer.write(value.id, index, undefined, 'binary');
	    }
	    else if (isUint8Array(value.id)) {
	        // Use the standard JS methods here because buffer.copy() is buggy with the
	        // browser polyfill
	        buffer.set(value.id.subarray(0, 12), index);
	    }
	    else {
	        throw new BSONTypeError('object [' + JSON.stringify(value) + '] is not a valid ObjectId');
	    }
	    // Adjust index
	    return index + 12;
	}
	function serializeBuffer(buffer, key, value, index, isArray) {
	    // Write the type
	    buffer[index++] = BSON_DATA_BINARY;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    // Get size of the buffer (current write point)
	    var size = value.length;
	    // Write the size of the string to buffer
	    buffer[index++] = size & 0xff;
	    buffer[index++] = (size >> 8) & 0xff;
	    buffer[index++] = (size >> 16) & 0xff;
	    buffer[index++] = (size >> 24) & 0xff;
	    // Write the default subtype
	    buffer[index++] = BSON_BINARY_SUBTYPE_DEFAULT;
	    // Copy the content form the binary field to the buffer
	    buffer.set(ensureBuffer(value), index);
	    // Adjust the index
	    index = index + size;
	    return index;
	}
	function serializeObject(buffer, key, value, index, checkKeys, depth, serializeFunctions, ignoreUndefined, isArray, path) {
	    if (checkKeys === void 0) { checkKeys = false; }
	    if (depth === void 0) { depth = 0; }
	    if (serializeFunctions === void 0) { serializeFunctions = false; }
	    if (ignoreUndefined === void 0) { ignoreUndefined = true; }
	    if (isArray === void 0) { isArray = false; }
	    if (path === void 0) { path = []; }
	    for (var i = 0; i < path.length; i++) {
	        if (path[i] === value)
	            throw new BSONError('cyclic dependency detected');
	    }
	    // Push value to stack
	    path.push(value);
	    // Write the type
	    buffer[index++] = Array.isArray(value) ? BSON_DATA_ARRAY : BSON_DATA_OBJECT;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    var endIndex = serializeInto(buffer, value, checkKeys, index, depth + 1, serializeFunctions, ignoreUndefined, path);
	    // Pop stack
	    path.pop();
	    return endIndex;
	}
	function serializeDecimal128(buffer, key, value, index, isArray) {
	    buffer[index++] = BSON_DATA_DECIMAL128;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    // Write the data from the value
	    // Prefer the standard JS methods because their typechecking is not buggy,
	    // unlike the `buffer` polyfill's.
	    buffer.set(value.bytes.subarray(0, 16), index);
	    return index + 16;
	}
	function serializeLong(buffer, key, value, index, isArray) {
	    // Write the type
	    buffer[index++] =
	        value._bsontype === 'Long' ? BSON_DATA_LONG : BSON_DATA_TIMESTAMP;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    // Write the date
	    var lowBits = value.getLowBits();
	    var highBits = value.getHighBits();
	    // Encode low bits
	    buffer[index++] = lowBits & 0xff;
	    buffer[index++] = (lowBits >> 8) & 0xff;
	    buffer[index++] = (lowBits >> 16) & 0xff;
	    buffer[index++] = (lowBits >> 24) & 0xff;
	    // Encode high bits
	    buffer[index++] = highBits & 0xff;
	    buffer[index++] = (highBits >> 8) & 0xff;
	    buffer[index++] = (highBits >> 16) & 0xff;
	    buffer[index++] = (highBits >> 24) & 0xff;
	    return index;
	}
	function serializeInt32(buffer, key, value, index, isArray) {
	    value = value.valueOf();
	    // Set int type 32 bits or less
	    buffer[index++] = BSON_DATA_INT;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    // Write the int value
	    buffer[index++] = value & 0xff;
	    buffer[index++] = (value >> 8) & 0xff;
	    buffer[index++] = (value >> 16) & 0xff;
	    buffer[index++] = (value >> 24) & 0xff;
	    return index;
	}
	function serializeDouble(buffer, key, value, index, isArray) {
	    // Encode as double
	    buffer[index++] = BSON_DATA_NUMBER;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    // Write float
	    DV_FOR_FLOAT64.setFloat64(0, value.value, true);
	    buffer.set(SPACE_FOR_FLOAT64, index);
	    // Adjust index
	    index = index + 8;
	    return index;
	}
	function serializeFunction(buffer, key, value, index, _checkKeys, _depth, isArray) {
	    buffer[index++] = BSON_DATA_CODE;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    // Function string
	    var functionString = normalizedFunctionString(value);
	    // Write the string
	    var size = buffer.write(functionString, index + 4, undefined, 'utf8') + 1;
	    // Write the size of the string to buffer
	    buffer[index] = size & 0xff;
	    buffer[index + 1] = (size >> 8) & 0xff;
	    buffer[index + 2] = (size >> 16) & 0xff;
	    buffer[index + 3] = (size >> 24) & 0xff;
	    // Update index
	    index = index + 4 + size - 1;
	    // Write zero
	    buffer[index++] = 0;
	    return index;
	}
	function serializeCode(buffer, key, value, index, checkKeys, depth, serializeFunctions, ignoreUndefined, isArray) {
	    if (checkKeys === void 0) { checkKeys = false; }
	    if (depth === void 0) { depth = 0; }
	    if (serializeFunctions === void 0) { serializeFunctions = false; }
	    if (ignoreUndefined === void 0) { ignoreUndefined = true; }
	    if (isArray === void 0) { isArray = false; }
	    if (value.scope && typeof value.scope === 'object') {
	        // Write the type
	        buffer[index++] = BSON_DATA_CODE_W_SCOPE;
	        // Number of written bytes
	        var numberOfWrittenBytes = !isArray
	            ? buffer.write(key, index, undefined, 'utf8')
	            : buffer.write(key, index, undefined, 'ascii');
	        // Encode the name
	        index = index + numberOfWrittenBytes;
	        buffer[index++] = 0;
	        // Starting index
	        var startIndex = index;
	        // Serialize the function
	        // Get the function string
	        var functionString = typeof value.code === 'string' ? value.code : value.code.toString();
	        // Index adjustment
	        index = index + 4;
	        // Write string into buffer
	        var codeSize = buffer.write(functionString, index + 4, undefined, 'utf8') + 1;
	        // Write the size of the string to buffer
	        buffer[index] = codeSize & 0xff;
	        buffer[index + 1] = (codeSize >> 8) & 0xff;
	        buffer[index + 2] = (codeSize >> 16) & 0xff;
	        buffer[index + 3] = (codeSize >> 24) & 0xff;
	        // Write end 0
	        buffer[index + 4 + codeSize - 1] = 0;
	        // Write the
	        index = index + codeSize + 4;
	        //
	        // Serialize the scope value
	        var endIndex = serializeInto(buffer, value.scope, checkKeys, index, depth + 1, serializeFunctions, ignoreUndefined);
	        index = endIndex - 1;
	        // Writ the total
	        var totalSize = endIndex - startIndex;
	        // Write the total size of the object
	        buffer[startIndex++] = totalSize & 0xff;
	        buffer[startIndex++] = (totalSize >> 8) & 0xff;
	        buffer[startIndex++] = (totalSize >> 16) & 0xff;
	        buffer[startIndex++] = (totalSize >> 24) & 0xff;
	        // Write trailing zero
	        buffer[index++] = 0;
	    }
	    else {
	        buffer[index++] = BSON_DATA_CODE;
	        // Number of written bytes
	        var numberOfWrittenBytes = !isArray
	            ? buffer.write(key, index, undefined, 'utf8')
	            : buffer.write(key, index, undefined, 'ascii');
	        // Encode the name
	        index = index + numberOfWrittenBytes;
	        buffer[index++] = 0;
	        // Function string
	        var functionString = value.code.toString();
	        // Write the string
	        var size = buffer.write(functionString, index + 4, undefined, 'utf8') + 1;
	        // Write the size of the string to buffer
	        buffer[index] = size & 0xff;
	        buffer[index + 1] = (size >> 8) & 0xff;
	        buffer[index + 2] = (size >> 16) & 0xff;
	        buffer[index + 3] = (size >> 24) & 0xff;
	        // Update index
	        index = index + 4 + size - 1;
	        // Write zero
	        buffer[index++] = 0;
	    }
	    return index;
	}
	function serializeBinary(buffer, key, value, index, isArray) {
	    // Write the type
	    buffer[index++] = BSON_DATA_BINARY;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    // Extract the buffer
	    var data = value.value(true);
	    // Calculate size
	    var size = value.position;
	    // Add the deprecated 02 type 4 bytes of size to total
	    if (value.sub_type === Binary.SUBTYPE_BYTE_ARRAY)
	        size = size + 4;
	    // Write the size of the string to buffer
	    buffer[index++] = size & 0xff;
	    buffer[index++] = (size >> 8) & 0xff;
	    buffer[index++] = (size >> 16) & 0xff;
	    buffer[index++] = (size >> 24) & 0xff;
	    // Write the subtype to the buffer
	    buffer[index++] = value.sub_type;
	    // If we have binary type 2 the 4 first bytes are the size
	    if (value.sub_type === Binary.SUBTYPE_BYTE_ARRAY) {
	        size = size - 4;
	        buffer[index++] = size & 0xff;
	        buffer[index++] = (size >> 8) & 0xff;
	        buffer[index++] = (size >> 16) & 0xff;
	        buffer[index++] = (size >> 24) & 0xff;
	    }
	    // Write the data to the object
	    buffer.set(data, index);
	    // Adjust the index
	    index = index + value.position;
	    return index;
	}
	function serializeSymbol(buffer, key, value, index, isArray) {
	    // Write the type
	    buffer[index++] = BSON_DATA_SYMBOL;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    // Write the string
	    var size = buffer.write(value.value, index + 4, undefined, 'utf8') + 1;
	    // Write the size of the string to buffer
	    buffer[index] = size & 0xff;
	    buffer[index + 1] = (size >> 8) & 0xff;
	    buffer[index + 2] = (size >> 16) & 0xff;
	    buffer[index + 3] = (size >> 24) & 0xff;
	    // Update index
	    index = index + 4 + size - 1;
	    // Write zero
	    buffer[index++] = 0x00;
	    return index;
	}
	function serializeDBRef(buffer, key, value, index, depth, serializeFunctions, isArray) {
	    // Write the type
	    buffer[index++] = BSON_DATA_OBJECT;
	    // Number of written bytes
	    var numberOfWrittenBytes = !isArray
	        ? buffer.write(key, index, undefined, 'utf8')
	        : buffer.write(key, index, undefined, 'ascii');
	    // Encode the name
	    index = index + numberOfWrittenBytes;
	    buffer[index++] = 0;
	    var startIndex = index;
	    var output = {
	        $ref: value.collection || value.namespace,
	        $id: value.oid
	    };
	    if (value.db != null) {
	        output.$db = value.db;
	    }
	    output = Object.assign(output, value.fields);
	    var endIndex = serializeInto(buffer, output, false, index, depth + 1, serializeFunctions);
	    // Calculate object size
	    var size = endIndex - startIndex;
	    // Write the size
	    buffer[startIndex++] = size & 0xff;
	    buffer[startIndex++] = (size >> 8) & 0xff;
	    buffer[startIndex++] = (size >> 16) & 0xff;
	    buffer[startIndex++] = (size >> 24) & 0xff;
	    // Set index
	    return endIndex;
	}
	function serializeInto(buffer, object, checkKeys, startingIndex, depth, serializeFunctions, ignoreUndefined, path) {
	    if (checkKeys === void 0) { checkKeys = false; }
	    if (startingIndex === void 0) { startingIndex = 0; }
	    if (depth === void 0) { depth = 0; }
	    if (serializeFunctions === void 0) { serializeFunctions = false; }
	    if (ignoreUndefined === void 0) { ignoreUndefined = true; }
	    if (path === void 0) { path = []; }
	    startingIndex = startingIndex || 0;
	    path = path || [];
	    // Push the object to the path
	    path.push(object);
	    // Start place to serialize into
	    var index = startingIndex + 4;
	    // Special case isArray
	    if (Array.isArray(object)) {
	        // Get object keys
	        for (var i = 0; i < object.length; i++) {
	            var key = "".concat(i);
	            var value = object[i];
	            // Is there an override value
	            if (typeof (value === null || value === void 0 ? void 0 : value.toBSON) === 'function') {
	                value = value.toBSON();
	            }
	            if (typeof value === 'string') {
	                index = serializeString(buffer, key, value, index, true);
	            }
	            else if (typeof value === 'number') {
	                index = serializeNumber(buffer, key, value, index, true);
	            }
	            else if (typeof value === 'bigint') {
	                throw new BSONTypeError('Unsupported type BigInt, please use Decimal128');
	            }
	            else if (typeof value === 'boolean') {
	                index = serializeBoolean(buffer, key, value, index, true);
	            }
	            else if (value instanceof Date || isDate(value)) {
	                index = serializeDate(buffer, key, value, index, true);
	            }
	            else if (value === undefined) {
	                index = serializeNull(buffer, key, value, index, true);
	            }
	            else if (value === null) {
	                index = serializeNull(buffer, key, value, index, true);
	            }
	            else if (value['_bsontype'] === 'ObjectId' || value['_bsontype'] === 'ObjectID') {
	                index = serializeObjectId(buffer, key, value, index, true);
	            }
	            else if (isUint8Array(value)) {
	                index = serializeBuffer(buffer, key, value, index, true);
	            }
	            else if (value instanceof RegExp || isRegExp(value)) {
	                index = serializeRegExp(buffer, key, value, index, true);
	            }
	            else if (typeof value === 'object' && value['_bsontype'] == null) {
	                index = serializeObject(buffer, key, value, index, checkKeys, depth, serializeFunctions, ignoreUndefined, true, path);
	            }
	            else if (typeof value === 'object' &&
	                isBSONType(value) &&
	                value._bsontype === 'Decimal128') {
	                index = serializeDecimal128(buffer, key, value, index, true);
	            }
	            else if (value['_bsontype'] === 'Long' || value['_bsontype'] === 'Timestamp') {
	                index = serializeLong(buffer, key, value, index, true);
	            }
	            else if (value['_bsontype'] === 'Double') {
	                index = serializeDouble(buffer, key, value, index, true);
	            }
	            else if (typeof value === 'function' && serializeFunctions) {
	                index = serializeFunction(buffer, key, value, index, checkKeys, depth, true);
	            }
	            else if (value['_bsontype'] === 'Code') {
	                index = serializeCode(buffer, key, value, index, checkKeys, depth, serializeFunctions, ignoreUndefined, true);
	            }
	            else if (value['_bsontype'] === 'Binary') {
	                index = serializeBinary(buffer, key, value, index, true);
	            }
	            else if (value['_bsontype'] === 'Symbol') {
	                index = serializeSymbol(buffer, key, value, index, true);
	            }
	            else if (value['_bsontype'] === 'DBRef') {
	                index = serializeDBRef(buffer, key, value, index, depth, serializeFunctions, true);
	            }
	            else if (value['_bsontype'] === 'BSONRegExp') {
	                index = serializeBSONRegExp(buffer, key, value, index, true);
	            }
	            else if (value['_bsontype'] === 'Int32') {
	                index = serializeInt32(buffer, key, value, index, true);
	            }
	            else if (value['_bsontype'] === 'MinKey' || value['_bsontype'] === 'MaxKey') {
	                index = serializeMinMax(buffer, key, value, index, true);
	            }
	            else if (typeof value['_bsontype'] !== 'undefined') {
	                throw new BSONTypeError("Unrecognized or invalid _bsontype: ".concat(String(value['_bsontype'])));
	            }
	        }
	    }
	    else if (object instanceof exports.Map || isMap(object)) {
	        var iterator = object.entries();
	        var done = false;
	        while (!done) {
	            // Unpack the next entry
	            var entry = iterator.next();
	            done = !!entry.done;
	            // Are we done, then skip and terminate
	            if (done)
	                continue;
	            // Get the entry values
	            var key = entry.value[0];
	            var value = entry.value[1];
	            // Check the type of the value
	            var type = typeof value;
	            // Check the key and throw error if it's illegal
	            if (typeof key === 'string' && !ignoreKeys.has(key)) {
	                if (key.match(regexp) != null) {
	                    // The BSON spec doesn't allow keys with null bytes because keys are
	                    // null-terminated.
	                    throw Error('key ' + key + ' must not contain null bytes');
	                }
	                if (checkKeys) {
	                    if ('$' === key[0]) {
	                        throw Error('key ' + key + " must not start with '$'");
	                    }
	                    else if (~key.indexOf('.')) {
	                        throw Error('key ' + key + " must not contain '.'");
	                    }
	                }
	            }
	            if (type === 'string') {
	                index = serializeString(buffer, key, value, index);
	            }
	            else if (type === 'number') {
	                index = serializeNumber(buffer, key, value, index);
	            }
	            else if (type === 'bigint' || isBigInt64Array(value) || isBigUInt64Array(value)) {
	                throw new BSONTypeError('Unsupported type BigInt, please use Decimal128');
	            }
	            else if (type === 'boolean') {
	                index = serializeBoolean(buffer, key, value, index);
	            }
	            else if (value instanceof Date || isDate(value)) {
	                index = serializeDate(buffer, key, value, index);
	            }
	            else if (value === null || (value === undefined && ignoreUndefined === false)) {
	                index = serializeNull(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'ObjectId' || value['_bsontype'] === 'ObjectID') {
	                index = serializeObjectId(buffer, key, value, index);
	            }
	            else if (isUint8Array(value)) {
	                index = serializeBuffer(buffer, key, value, index);
	            }
	            else if (value instanceof RegExp || isRegExp(value)) {
	                index = serializeRegExp(buffer, key, value, index);
	            }
	            else if (type === 'object' && value['_bsontype'] == null) {
	                index = serializeObject(buffer, key, value, index, checkKeys, depth, serializeFunctions, ignoreUndefined, false, path);
	            }
	            else if (type === 'object' && value['_bsontype'] === 'Decimal128') {
	                index = serializeDecimal128(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'Long' || value['_bsontype'] === 'Timestamp') {
	                index = serializeLong(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'Double') {
	                index = serializeDouble(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'Code') {
	                index = serializeCode(buffer, key, value, index, checkKeys, depth, serializeFunctions, ignoreUndefined);
	            }
	            else if (typeof value === 'function' && serializeFunctions) {
	                index = serializeFunction(buffer, key, value, index, checkKeys, depth, serializeFunctions);
	            }
	            else if (value['_bsontype'] === 'Binary') {
	                index = serializeBinary(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'Symbol') {
	                index = serializeSymbol(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'DBRef') {
	                index = serializeDBRef(buffer, key, value, index, depth, serializeFunctions);
	            }
	            else if (value['_bsontype'] === 'BSONRegExp') {
	                index = serializeBSONRegExp(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'Int32') {
	                index = serializeInt32(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'MinKey' || value['_bsontype'] === 'MaxKey') {
	                index = serializeMinMax(buffer, key, value, index);
	            }
	            else if (typeof value['_bsontype'] !== 'undefined') {
	                throw new BSONTypeError("Unrecognized or invalid _bsontype: ".concat(String(value['_bsontype'])));
	            }
	        }
	    }
	    else {
	        if (typeof (object === null || object === void 0 ? void 0 : object.toBSON) === 'function') {
	            // Provided a custom serialization method
	            object = object.toBSON();
	            if (object != null && typeof object !== 'object') {
	                throw new BSONTypeError('toBSON function did not return an object');
	            }
	        }
	        // Iterate over all the keys
	        for (var key in object) {
	            var value = object[key];
	            // Is there an override value
	            if (typeof (value === null || value === void 0 ? void 0 : value.toBSON) === 'function') {
	                value = value.toBSON();
	            }
	            // Check the type of the value
	            var type = typeof value;
	            // Check the key and throw error if it's illegal
	            if (typeof key === 'string' && !ignoreKeys.has(key)) {
	                if (key.match(regexp) != null) {
	                    // The BSON spec doesn't allow keys with null bytes because keys are
	                    // null-terminated.
	                    throw Error('key ' + key + ' must not contain null bytes');
	                }
	                if (checkKeys) {
	                    if ('$' === key[0]) {
	                        throw Error('key ' + key + " must not start with '$'");
	                    }
	                    else if (~key.indexOf('.')) {
	                        throw Error('key ' + key + " must not contain '.'");
	                    }
	                }
	            }
	            if (type === 'string') {
	                index = serializeString(buffer, key, value, index);
	            }
	            else if (type === 'number') {
	                index = serializeNumber(buffer, key, value, index);
	            }
	            else if (type === 'bigint') {
	                throw new BSONTypeError('Unsupported type BigInt, please use Decimal128');
	            }
	            else if (type === 'boolean') {
	                index = serializeBoolean(buffer, key, value, index);
	            }
	            else if (value instanceof Date || isDate(value)) {
	                index = serializeDate(buffer, key, value, index);
	            }
	            else if (value === undefined) {
	                if (ignoreUndefined === false)
	                    index = serializeNull(buffer, key, value, index);
	            }
	            else if (value === null) {
	                index = serializeNull(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'ObjectId' || value['_bsontype'] === 'ObjectID') {
	                index = serializeObjectId(buffer, key, value, index);
	            }
	            else if (isUint8Array(value)) {
	                index = serializeBuffer(buffer, key, value, index);
	            }
	            else if (value instanceof RegExp || isRegExp(value)) {
	                index = serializeRegExp(buffer, key, value, index);
	            }
	            else if (type === 'object' && value['_bsontype'] == null) {
	                index = serializeObject(buffer, key, value, index, checkKeys, depth, serializeFunctions, ignoreUndefined, false, path);
	            }
	            else if (type === 'object' && value['_bsontype'] === 'Decimal128') {
	                index = serializeDecimal128(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'Long' || value['_bsontype'] === 'Timestamp') {
	                index = serializeLong(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'Double') {
	                index = serializeDouble(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'Code') {
	                index = serializeCode(buffer, key, value, index, checkKeys, depth, serializeFunctions, ignoreUndefined);
	            }
	            else if (typeof value === 'function' && serializeFunctions) {
	                index = serializeFunction(buffer, key, value, index, checkKeys, depth, serializeFunctions);
	            }
	            else if (value['_bsontype'] === 'Binary') {
	                index = serializeBinary(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'Symbol') {
	                index = serializeSymbol(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'DBRef') {
	                index = serializeDBRef(buffer, key, value, index, depth, serializeFunctions);
	            }
	            else if (value['_bsontype'] === 'BSONRegExp') {
	                index = serializeBSONRegExp(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'Int32') {
	                index = serializeInt32(buffer, key, value, index);
	            }
	            else if (value['_bsontype'] === 'MinKey' || value['_bsontype'] === 'MaxKey') {
	                index = serializeMinMax(buffer, key, value, index);
	            }
	            else if (typeof value['_bsontype'] !== 'undefined') {
	                throw new BSONTypeError("Unrecognized or invalid _bsontype: ".concat(String(value['_bsontype'])));
	            }
	        }
	    }
	    // Remove the path
	    path.pop();
	    // Final padding byte for object
	    buffer[index++] = 0x00;
	    // Final size
	    var size = index - startingIndex;
	    // Write the size of the object
	    buffer[startingIndex++] = size & 0xff;
	    buffer[startingIndex++] = (size >> 8) & 0xff;
	    buffer[startingIndex++] = (size >> 16) & 0xff;
	    buffer[startingIndex++] = (size >> 24) & 0xff;
	    return index;
	}

	/** @internal */
	// Default Max Size
	var MAXSIZE = 1024 * 1024 * 17;
	// Current Internal Temporary Serialization Buffer
	var buffer = buffer_1.alloc(MAXSIZE);
	/**
	 * Sets the size of the internal serialization buffer.
	 *
	 * @param size - The desired size for the internal serialization buffer
	 * @public
	 */
	function setInternalBufferSize(size) {
	    // Resize the internal serialization buffer if needed
	    if (buffer.length < size) {
	        buffer = buffer_1.alloc(size);
	    }
	}
	/**
	 * Serialize a Javascript object.
	 *
	 * @param object - the Javascript object to serialize.
	 * @returns Buffer object containing the serialized object.
	 * @public
	 */
	function serialize(object, options) {
	    if (options === void 0) { options = {}; }
	    // Unpack the options
	    var checkKeys = typeof options.checkKeys === 'boolean' ? options.checkKeys : false;
	    var serializeFunctions = typeof options.serializeFunctions === 'boolean' ? options.serializeFunctions : false;
	    var ignoreUndefined = typeof options.ignoreUndefined === 'boolean' ? options.ignoreUndefined : true;
	    var minInternalBufferSize = typeof options.minInternalBufferSize === 'number' ? options.minInternalBufferSize : MAXSIZE;
	    // Resize the internal serialization buffer if needed
	    if (buffer.length < minInternalBufferSize) {
	        buffer = buffer_1.alloc(minInternalBufferSize);
	    }
	    // Attempt to serialize
	    var serializationIndex = serializeInto(buffer, object, checkKeys, 0, 0, serializeFunctions, ignoreUndefined, []);
	    // Create the final buffer
	    var finishedBuffer = buffer_1.alloc(serializationIndex);
	    // Copy into the finished buffer
	    buffer.copy(finishedBuffer, 0, 0, finishedBuffer.length);
	    // Return the buffer
	    return finishedBuffer;
	}
	/**
	 * Serialize a Javascript object using a predefined Buffer and index into the buffer,
	 * useful when pre-allocating the space for serialization.
	 *
	 * @param object - the Javascript object to serialize.
	 * @param finalBuffer - the Buffer you pre-allocated to store the serialized BSON object.
	 * @returns the index pointing to the last written byte in the buffer.
	 * @public
	 */
	function serializeWithBufferAndIndex(object, finalBuffer, options) {
	    if (options === void 0) { options = {}; }
	    // Unpack the options
	    var checkKeys = typeof options.checkKeys === 'boolean' ? options.checkKeys : false;
	    var serializeFunctions = typeof options.serializeFunctions === 'boolean' ? options.serializeFunctions : false;
	    var ignoreUndefined = typeof options.ignoreUndefined === 'boolean' ? options.ignoreUndefined : true;
	    var startIndex = typeof options.index === 'number' ? options.index : 0;
	    // Attempt to serialize
	    var serializationIndex = serializeInto(buffer, object, checkKeys, 0, 0, serializeFunctions, ignoreUndefined);
	    buffer.copy(finalBuffer, startIndex, 0, serializationIndex);
	    // Return the index
	    return startIndex + serializationIndex - 1;
	}
	/**
	 * Deserialize data as BSON.
	 *
	 * @param buffer - the buffer containing the serialized set of BSON documents.
	 * @returns returns the deserialized Javascript Object.
	 * @public
	 */
	function deserialize(buffer, options) {
	    if (options === void 0) { options = {}; }
	    return deserialize$1(buffer instanceof buffer_1 ? buffer : ensureBuffer(buffer), options);
	}
	/**
	 * Calculate the bson size for a passed in Javascript object.
	 *
	 * @param object - the Javascript object to calculate the BSON byte size for
	 * @returns size of BSON object in bytes
	 * @public
	 */
	function calculateObjectSize(object, options) {
	    if (options === void 0) { options = {}; }
	    options = options || {};
	    var serializeFunctions = typeof options.serializeFunctions === 'boolean' ? options.serializeFunctions : false;
	    var ignoreUndefined = typeof options.ignoreUndefined === 'boolean' ? options.ignoreUndefined : true;
	    return calculateObjectSize$1(object, serializeFunctions, ignoreUndefined);
	}
	/**
	 * Deserialize stream data as BSON documents.
	 *
	 * @param data - the buffer containing the serialized set of BSON documents.
	 * @param startIndex - the start index in the data Buffer where the deserialization is to start.
	 * @param numberOfDocuments - number of documents to deserialize.
	 * @param documents - an array where to store the deserialized documents.
	 * @param docStartIndex - the index in the documents array from where to start inserting documents.
	 * @param options - additional options used for the deserialization.
	 * @returns next index in the buffer after deserialization **x** numbers of documents.
	 * @public
	 */
	function deserializeStream(data, startIndex, numberOfDocuments, documents, docStartIndex, options) {
	    var internalOptions = Object.assign({ allowObjectSmallerThanBufferSize: true, index: 0 }, options);
	    var bufferData = ensureBuffer(data);
	    var index = startIndex;
	    // Loop over all documents
	    for (var i = 0; i < numberOfDocuments; i++) {
	        // Find size of the document
	        var size = bufferData[index] |
	            (bufferData[index + 1] << 8) |
	            (bufferData[index + 2] << 16) |
	            (bufferData[index + 3] << 24);
	        // Update options with index
	        internalOptions.index = index;
	        // Parse the document at this point
	        documents[docStartIndex + i] = deserialize$1(bufferData, internalOptions);
	        // Adjust index by the document size
	        index = index + size;
	    }
	    // Return object containing end index of parsing and list of documents
	    return index;
	}
	/**
	 * BSON default export
	 * @deprecated Please use named exports
	 * @privateRemarks
	 * We want to someday deprecate the default export,
	 * so none of the new TS types are being exported on the default
	 * @public
	 */
	var BSON = {
	    Binary: Binary,
	    Code: Code,
	    DBRef: DBRef,
	    Decimal128: Decimal128,
	    Double: Double,
	    Int32: Int32,
	    Long: Long,
	    UUID: UUID,
	    Map: exports.Map,
	    MaxKey: MaxKey,
	    MinKey: MinKey,
	    ObjectId: ObjectId,
	    ObjectID: ObjectId,
	    BSONRegExp: BSONRegExp,
	    BSONSymbol: BSONSymbol,
	    Timestamp: Timestamp,
	    EJSON: exports.EJSON,
	    setInternalBufferSize: setInternalBufferSize,
	    serialize: serialize,
	    serializeWithBufferAndIndex: serializeWithBufferAndIndex,
	    deserialize: deserialize,
	    calculateObjectSize: calculateObjectSize,
	    deserializeStream: deserializeStream,
	    BSONError: BSONError,
	    BSONTypeError: BSONTypeError
	};

	exports.BSONError = BSONError;
	exports.BSONRegExp = BSONRegExp;
	exports.BSONSymbol = BSONSymbol;
	exports.BSONTypeError = BSONTypeError;
	exports.BSON_BINARY_SUBTYPE_BYTE_ARRAY = BSON_BINARY_SUBTYPE_BYTE_ARRAY;
	exports.BSON_BINARY_SUBTYPE_COLUMN = BSON_BINARY_SUBTYPE_COLUMN;
	exports.BSON_BINARY_SUBTYPE_DEFAULT = BSON_BINARY_SUBTYPE_DEFAULT;
	exports.BSON_BINARY_SUBTYPE_ENCRYPTED = BSON_BINARY_SUBTYPE_ENCRYPTED;
	exports.BSON_BINARY_SUBTYPE_FUNCTION = BSON_BINARY_SUBTYPE_FUNCTION;
	exports.BSON_BINARY_SUBTYPE_MD5 = BSON_BINARY_SUBTYPE_MD5;
	exports.BSON_BINARY_SUBTYPE_USER_DEFINED = BSON_BINARY_SUBTYPE_USER_DEFINED;
	exports.BSON_BINARY_SUBTYPE_UUID = BSON_BINARY_SUBTYPE_UUID;
	exports.BSON_BINARY_SUBTYPE_UUID_NEW = BSON_BINARY_SUBTYPE_UUID_NEW;
	exports.BSON_DATA_ARRAY = BSON_DATA_ARRAY;
	exports.BSON_DATA_BINARY = BSON_DATA_BINARY;
	exports.BSON_DATA_BOOLEAN = BSON_DATA_BOOLEAN;
	exports.BSON_DATA_CODE = BSON_DATA_CODE;
	exports.BSON_DATA_CODE_W_SCOPE = BSON_DATA_CODE_W_SCOPE;
	exports.BSON_DATA_DATE = BSON_DATA_DATE;
	exports.BSON_DATA_DBPOINTER = BSON_DATA_DBPOINTER;
	exports.BSON_DATA_DECIMAL128 = BSON_DATA_DECIMAL128;
	exports.BSON_DATA_INT = BSON_DATA_INT;
	exports.BSON_DATA_LONG = BSON_DATA_LONG;
	exports.BSON_DATA_MAX_KEY = BSON_DATA_MAX_KEY;
	exports.BSON_DATA_MIN_KEY = BSON_DATA_MIN_KEY;
	exports.BSON_DATA_NULL = BSON_DATA_NULL;
	exports.BSON_DATA_NUMBER = BSON_DATA_NUMBER;
	exports.BSON_DATA_OBJECT = BSON_DATA_OBJECT;
	exports.BSON_DATA_OID = BSON_DATA_OID;
	exports.BSON_DATA_REGEXP = BSON_DATA_REGEXP;
	exports.BSON_DATA_STRING = BSON_DATA_STRING;
	exports.BSON_DATA_SYMBOL = BSON_DATA_SYMBOL;
	exports.BSON_DATA_TIMESTAMP = BSON_DATA_TIMESTAMP;
	exports.BSON_DATA_UNDEFINED = BSON_DATA_UNDEFINED;
	exports.BSON_INT32_MAX = BSON_INT32_MAX$1;
	exports.BSON_INT32_MIN = BSON_INT32_MIN$1;
	exports.BSON_INT64_MAX = BSON_INT64_MAX$1;
	exports.BSON_INT64_MIN = BSON_INT64_MIN$1;
	exports.Binary = Binary;
	exports.Code = Code;
	exports.DBRef = DBRef;
	exports.Decimal128 = Decimal128;
	exports.Double = Double;
	exports.Int32 = Int32;
	exports.Long = Long;
	exports.LongWithoutOverridesClass = LongWithoutOverridesClass;
	exports.MaxKey = MaxKey;
	exports.MinKey = MinKey;
	exports.ObjectID = ObjectId;
	exports.ObjectId = ObjectId;
	exports.Timestamp = Timestamp;
	exports.UUID = UUID;
	exports.calculateObjectSize = calculateObjectSize;
	exports.default = BSON;
	exports.deserialize = deserialize;
	exports.deserializeStream = deserializeStream;
	exports.serialize = serialize;
	exports.serializeWithBufferAndIndex = serializeWithBufferAndIndex;
	exports.setInternalBufferSize = setInternalBufferSize;

	Object.defineProperty(exports, '__esModule', { value: true });

	return exports;

}({}));
//# sourceMappingURL=bson.bundle.js.map