neo4j-driver/lib/v1/integer.js

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.toString = exports.toNumber = exports.inSafeRange = exports.isInt = exports.int = undefined;

var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _createClass2 = require('babel-runtime/helpers/createClass');

var _createClass3 = _interopRequireDefault(_createClass2);

var _error = require('./error');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Constructs a 64 bit two's-complement integer, given its low and high 32 bit values as *signed* integers.
 * See exported functions for more convenient ways of operating integers.
 * Use <code>int()</code> function to create new integers, <code>isInt()</code> to check if given object is integer,
 * <code>inSafeRange()</code> to check if it is safe to convert given value to native number,
 * <code>toNumber()</code> and <code>toString()</code> to convert given integer to number or string respectively.
 * @access public
 * @exports Integer
 * @class A Integer class for representing a 64 bit two's-complement integer value.
 * @param {number} low The low (signed) 32 bits of the long
 * @param {number} high The high (signed) 32 bits of the long
 * @constructor
 *
 * @deprecated This class will be removed or made internal in a future version of the driver.
 */
var Integer = function () {
  function Integer(low, high) {
    (0, _classCallCheck3.default)(this, Integer);

    /**
     * The low 32 bits as a signed value.
     * @type {number}
     * @expose
     */
    this.low = low | 0;

    /**
     * The high 32 bits as a signed value.
     * @type {number}
     * @expose
     */
    this.high = high | 0;
  }

  // The internal representation of an Integer 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 defined below the from*
  // methods on which they depend.


  (0, _createClass3.default)(Integer, [{
    key: 'inSafeRange',
    value: function inSafeRange() {
      return this.greaterThanOrEqual(Integer.MIN_SAFE_VALUE) && this.lessThanOrEqual(Integer.MAX_SAFE_VALUE);
    }
    /**
     * Converts the Integer to an exact javascript Number, assuming it is a 32 bit integer.
     * @returns {number}
     * @expose
     */

  }, {
    key: 'toInt',
    value: function toInt() {
      return this.low;
    }
  }, {
    key: 'toNumber',


    /**
     * Converts the Integer to a the nearest floating-point representation of this value (double, 53 bit mantissa).
     * @returns {number}
     * @expose
     */
    value: function toNumber() {
      return this.high * TWO_PWR_32_DBL + (this.low >>> 0);
    }

    /**
     * Converts the Integer to native number or -Infinity/+Infinity when it does not fit.
     * @return {number}
     * @package
     */

  }, {
    key: 'toNumberOrInfinity',
    value: function toNumberOrInfinity() {
      if (this.lessThan(Integer.MIN_SAFE_VALUE)) {
        return Number.NEGATIVE_INFINITY;
      } else if (this.greaterThan(Integer.MAX_SAFE_VALUE)) {
        return Number.POSITIVE_INFINITY;
      } else {
        return this.toNumber();
      }
    }

    /**
     * Converts the Integer to a string written in the specified radix.
     * @param {number=} radix Radix (2-36), defaults to 10
     * @returns {string}
     * @override
     * @throws {RangeError} If `radix` is out of range
     * @expose
     */

  }, {
    key: 'toString',
    value: function toString(radix) {
      radix = radix || 10;
      if (radix < 2 || 36 < radix) throw RangeError('radix out of range: ' + radix);
      if (this.isZero()) return '0';
      var rem;
      if (this.isNegative()) {
        if (this.equals(Integer.MIN_VALUE)) {
          // We need to change the Integer value before it can be negated, so we remove
          // the bottom-most digit in this base and then recurse to do the rest.
          var radixInteger = Integer.fromNumber(radix);
          var div = this.div(radixInteger);
          rem = div.multiply(radixInteger).subtract(this);
          return div.toString(radix) + rem.toInt().toString(radix);
        } else return '-' + this.negate().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 = Integer.fromNumber(Math.pow(radix, 6));
      rem = this;
      var result = '';
      while (true) {
        var remDiv = rem.div(radixToPower),
            intval = rem.subtract(remDiv.multiply(radixToPower)).toInt() >>> 0,
            digits = intval.toString(radix);
        rem = remDiv;
        if (rem.isZero()) return digits + result;else {
          while (digits.length < 6) {
            digits = '0' + digits;
          }result = '' + digits + result;
        }
      }
    }

    /**
     * Gets the high 32 bits as a signed integer.
     * @returns {number} Signed high bits
     * @expose
     */

  }, {
    key: 'getHighBits',
    value: function getHighBits() {
      return this.high;
    }

    /**
     * Gets the low 32 bits as a signed integer.
     * @returns {number} Signed low bits
     * @expose
     */

  }, {
    key: 'getLowBits',
    value: function getLowBits() {
      return this.low;
    }

    /**
     * Gets the number of bits needed to represent the absolute value of this Integer.
     * @returns {number}
     * @expose
     */

  }, {
    key: 'getNumBitsAbs',
    value: function getNumBitsAbs() {
      if (this.isNegative()) return this.equals(Integer.MIN_VALUE) ? 64 : this.negate().getNumBitsAbs();
      var val = this.high != 0 ? this.high : this.low;
      for (var bit = 31; bit > 0; bit--) {
        if ((val & 1 << bit) != 0) break;
      }return this.high != 0 ? bit + 33 : bit + 1;
    }

    /**
     * Tests if this Integer's value equals zero.
     * @returns {boolean}
     * @expose
     */

  }, {
    key: 'isZero',
    value: function isZero() {
      return this.high === 0 && this.low === 0;
    }

    /**
     * Tests if this Integer's value is negative.
     * @returns {boolean}
     * @expose
     */

  }, {
    key: 'isNegative',
    value: function isNegative() {
      return this.high < 0;
    }

    /**
     * Tests if this Integer's value is positive.
     * @returns {boolean}
     * @expose
     */

  }, {
    key: 'isPositive',
    value: function isPositive() {
      return this.high >= 0;
    }

    /**
     * Tests if this Integer's value is odd.
     * @returns {boolean}
     * @expose
     */

  }, {
    key: 'isOdd',
    value: function isOdd() {
      return (this.low & 1) === 1;
    }

    /**
     * Tests if this Integer's value is even.
     * @returns {boolean}
     * @expose
     */

  }, {
    key: 'isEven',
    value: function isEven() {
      return (this.low & 1) === 0;
    }
  }, {
    key: 'equals',


    /**
     * Tests if this Integer's value equals the specified's.
     * @param {!Integer|number|string} other Other value
     * @returns {boolean}
     * @expose
     */
    value: function equals(other) {
      if (!Integer.isInteger(other)) other = Integer.fromValue(other);
      return this.high === other.high && this.low === other.low;
    }

    /**
     * Tests if this Integer's value differs from the specified's.
     * @param {!Integer|number|string} other Other value
     * @returns {boolean}
     * @expose
     */

  }, {
    key: 'notEquals',
    value: function notEquals(other) {
      return !this.equals( /* validates */other);
    }

    /**
     * Tests if this Integer's value is less than the specified's.
     * @param {!Integer|number|string} other Other value
     * @returns {boolean}
     * @expose
     */

  }, {
    key: 'lessThan',
    value: function lessThan(other) {
      return this.compare( /* validates */other) < 0;
    }

    /**
     * Tests if this Integer's value is less than or equal the specified's.
     * @param {!Integer|number|string} other Other value
     * @returns {boolean}
     * @expose
     */

  }, {
    key: 'lessThanOrEqual',
    value: function lessThanOrEqual(other) {
      return this.compare( /* validates */other) <= 0;
    }

    /**
     * Tests if this Integer's value is greater than the specified's.
     * @param {!Integer|number|string} other Other value
     * @returns {boolean}
     * @expose
     */

  }, {
    key: 'greaterThan',
    value: function greaterThan(other) {
      return this.compare( /* validates */other) > 0;
    }

    /**
     * Tests if this Integer's value is greater than or equal the specified's.
     * @param {!Integer|number|string} other Other value
     * @returns {boolean}
     * @expose
     */

  }, {
    key: 'greaterThanOrEqual',
    value: function greaterThanOrEqual(other) {
      return this.compare( /* validates */other) >= 0;
    }

    /**
     * Compares this Integer's value with the specified's.
     * @param {!Integer|number|string} other Other value
     * @returns {number} 0 if they are the same, 1 if the this is greater and -1
     *  if the given one is greater
     * @expose
     */

  }, {
    key: 'compare',
    value: function compare(other) {
      if (!Integer.isInteger(other)) other = Integer.fromValue(other);
      if (this.equals(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
      return this.subtract(other).isNegative() ? -1 : 1;
    }

    /**
     * Negates this Integer's value.
     * @returns {!Integer} Negated Integer
     * @expose
     */

  }, {
    key: 'negate',
    value: function negate() {
      if (this.equals(Integer.MIN_VALUE)) return Integer.MIN_VALUE;
      return this.not().add(Integer.ONE);
    }

    /**
     * Returns the sum of this and the specified Integer.
     * @param {!Integer|number|string} addend Addend
     * @returns {!Integer} Sum
     * @expose
     */

  }, {
    key: 'add',
    value: function add(addend) {
      if (!Integer.isInteger(addend)) addend = Integer.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 Integer.fromBits(c16 << 16 | c00, c48 << 16 | c32);
    }

    /**
     * Returns the difference of this and the specified Integer.
     * @param {!Integer|number|string} subtrahend Subtrahend
     * @returns {!Integer} Difference
     * @expose
     */

  }, {
    key: 'subtract',
    value: function subtract(subtrahend) {
      if (!Integer.isInteger(subtrahend)) subtrahend = Integer.fromValue(subtrahend);
      return this.add(subtrahend.negate());
    }

    /**
     * Returns the product of this and the specified Integer.
     * @param {!Integer|number|string} multiplier Multiplier
     * @returns {!Integer} Product
     * @expose
     */

  }, {
    key: 'multiply',
    value: function multiply(multiplier) {
      if (this.isZero()) return Integer.ZERO;
      if (!Integer.isInteger(multiplier)) multiplier = Integer.fromValue(multiplier);
      if (multiplier.isZero()) return Integer.ZERO;
      if (this.equals(Integer.MIN_VALUE)) return multiplier.isOdd() ? Integer.MIN_VALUE : Integer.ZERO;
      if (multiplier.equals(Integer.MIN_VALUE)) return this.isOdd() ? Integer.MIN_VALUE : Integer.ZERO;

      if (this.isNegative()) {
        if (multiplier.isNegative()) return this.negate().multiply(multiplier.negate());else return this.negate().multiply(multiplier).negate();
      } else if (multiplier.isNegative()) return this.multiply(multiplier.negate()).negate();

      // If both longs are small, use float multiplication
      if (this.lessThan(TWO_PWR_24) && multiplier.lessThan(TWO_PWR_24)) return Integer.fromNumber(this.toNumber() * multiplier.toNumber());

      // 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 Integer.fromBits(c16 << 16 | c00, c48 << 16 | c32);
    }
  }, {
    key: 'div',


    /**
     * Returns this Integer divided by the specified.
     * @param {!Integer|number|string} divisor Divisor
     * @returns {!Integer} Quotient
     * @expose
     */
    value: function div(divisor) {
      if (!Integer.isInteger(divisor)) divisor = Integer.fromValue(divisor);
      if (divisor.isZero()) throw (0, _error.newError)('division by zero');
      if (this.isZero()) return Integer.ZERO;
      var approx, rem, res;
      if (this.equals(Integer.MIN_VALUE)) {
        if (divisor.equals(Integer.ONE) || divisor.equals(Integer.NEG_ONE)) return Integer.MIN_VALUE; // recall that -MIN_VALUE == MIN_VALUE
        else if (divisor.equals(Integer.MIN_VALUE)) return Integer.ONE;else {
            // At this point, we have |other| >= 2, so |this/other| < |MIN_VALUE|.
            var halfThis = this.shiftRight(1);
            approx = halfThis.div(divisor).shiftLeft(1);
            if (approx.equals(Integer.ZERO)) {
              return divisor.isNegative() ? Integer.ONE : Integer.NEG_ONE;
            } else {
              rem = this.subtract(divisor.multiply(approx));
              res = approx.add(rem.div(divisor));
              return res;
            }
          }
      } else if (divisor.equals(Integer.MIN_VALUE)) return Integer.ZERO;
      if (this.isNegative()) {
        if (divisor.isNegative()) return this.negate().div(divisor.negate());
        return this.negate().div(divisor).negate();
      } else if (divisor.isNegative()) return this.div(divisor.negate()).negate();

      // 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.
      res = Integer.ZERO;
      rem = this;
      while (rem.greaterThanOrEqual(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),
            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.
        approxRes = Integer.fromNumber(approx),
            approxRem = approxRes.multiply(divisor);
        while (approxRem.isNegative() || approxRem.greaterThan(rem)) {
          approx -= delta;
          approxRes = Integer.fromNumber(approx);
          approxRem = approxRes.multiply(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 = Integer.ONE;

        res = res.add(approxRes);
        rem = rem.subtract(approxRem);
      }
      return res;
    }

    /**
     * Returns this Integer modulo the specified.
     * @param {!Integer|number|string} divisor Divisor
     * @returns {!Integer} Remainder
     * @expose
     */

  }, {
    key: 'modulo',
    value: function modulo(divisor) {
      if (!Integer.isInteger(divisor)) divisor = Integer.fromValue(divisor);
      return this.subtract(this.div(divisor).multiply(divisor));
    }

    /**
     * Returns the bitwise NOT of this Integer.
     * @returns {!Integer}
     * @expose
     */

  }, {
    key: 'not',
    value: function not() {
      return Integer.fromBits(~this.low, ~this.high);
    }

    /**
     * Returns the bitwise AND of this Integer and the specified.
     * @param {!Integer|number|string} other Other Integer
     * @returns {!Integer}
     * @expose
     */

  }, {
    key: 'and',
    value: function and(other) {
      if (!Integer.isInteger(other)) other = Integer.fromValue(other);
      return Integer.fromBits(this.low & other.low, this.high & other.high);
    }

    /**
     * Returns the bitwise OR of this Integer and the specified.
     * @param {!Integer|number|string} other Other Integer
     * @returns {!Integer}
     * @expose
     */

  }, {
    key: 'or',
    value: function or(other) {
      if (!Integer.isInteger(other)) other = Integer.fromValue(other);
      return Integer.fromBits(this.low | other.low, this.high | other.high);
    }

    /**
     * Returns the bitwise XOR of this Integer and the given one.
     * @param {!Integer|number|string} other Other Integer
     * @returns {!Integer}
     * @expose
     */

  }, {
    key: 'xor',
    value: function xor(other) {
      if (!Integer.isInteger(other)) other = Integer.fromValue(other);
      return Integer.fromBits(this.low ^ other.low, this.high ^ other.high);
    }

    /**
     * Returns this Integer with bits shifted to the left by the given amount.
     * @param {number|!Integer} numBits Number of bits
     * @returns {!Integer} Shifted Integer
     * @expose
     */

  }, {
    key: 'shiftLeft',
    value: function shiftLeft(numBits) {
      if (Integer.isInteger(numBits)) numBits = numBits.toInt();
      if ((numBits &= 63) === 0) return this;else if (numBits < 32) return Integer.fromBits(this.low << numBits, this.high << numBits | this.low >>> 32 - numBits);else return Integer.fromBits(0, this.low << numBits - 32);
    }

    /**
     * Returns this Integer with bits arithmetically shifted to the right by the given amount.
     * @param {number|!Integer} numBits Number of bits
     * @returns {!Integer} Shifted Integer
     * @expose
     */

  }, {
    key: 'shiftRight',
    value: function shiftRight(numBits) {
      if (Integer.isInteger(numBits)) numBits = numBits.toInt();
      if ((numBits &= 63) === 0) return this;else if (numBits < 32) return Integer.fromBits(this.low >>> numBits | this.high << 32 - numBits, this.high >> numBits);else return Integer.fromBits(this.high >> numBits - 32, this.high >= 0 ? 0 : -1);
    }
  }]);
  return Integer;
}();

/**
 * An indicator used to reliably determine if an object is a Integer or not.
 * @type {boolean}
 * @const
 * @expose
 * @private
 */
/**
 * Copyright (c) 2002-2018 Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// 64-bit Integer library, originally from Long.js by dcodeIO
// https://github.com/dcodeIO/Long.js
// License Apache 2

Integer.__isInteger__;

Object.defineProperty(Integer.prototype, "__isInteger__", {
  value: true,
  enumerable: false,
  configurable: false
});

/**
 * Tests if the specified object is a Integer.
 * @access private
 * @param {*} obj Object
 * @returns {boolean}
 * @expose
 */
Integer.isInteger = function (obj) {
  return (obj && obj["__isInteger__"]) === true;
};

/**
 * A cache of the Integer representations of small integer values.
 * @type {!Object}
 * @inner
 * @private
 */
var INT_CACHE = {};

/**
 * Returns a Integer representing the given 32 bit integer value.
 * @access private
 * @param {number} value The 32 bit integer in question
 * @returns {!Integer} The corresponding Integer value
 * @expose
 */
Integer.fromInt = function (value) {
  var obj, cachedObj;
  value = value | 0;
  if (-128 <= value && value < 128) {
    cachedObj = INT_CACHE[value];
    if (cachedObj) return cachedObj;
  }
  obj = new Integer(value, value < 0 ? -1 : 0, false);
  if (-128 <= value && value < 128) INT_CACHE[value] = obj;
  return obj;
};

/**
 * Returns a Integer representing the given value, provided that it is a finite number. Otherwise, zero is returned.
 * @access private
 * @param {number} value The number in question
 * @returns {!Integer} The corresponding Integer value
 * @expose
 */
Integer.fromNumber = function (value) {
  if (isNaN(value) || !isFinite(value)) return Integer.ZERO;
  if (value <= -TWO_PWR_63_DBL) return Integer.MIN_VALUE;
  if (value + 1 >= TWO_PWR_63_DBL) return Integer.MAX_VALUE;
  if (value < 0) return Integer.fromNumber(-value).negate();
  return new Integer(value % TWO_PWR_32_DBL | 0, value / TWO_PWR_32_DBL | 0);
};

/**
 * Returns a Integer representing the 64 bit integer that comes by concatenating the given low and high bits. Each is
 *  assumed to use 32 bits.
 * @access private
 * @param {number} lowBits The low 32 bits
 * @param {number} highBits The high 32 bits
 * @returns {!Integer} The corresponding Integer value
 * @expose
 */
Integer.fromBits = function (lowBits, highBits) {
  return new Integer(lowBits, highBits);
};

/**
 * Returns a Integer representation of the given string, written using the specified radix.
 * @access private
 * @param {string} str The textual representation of the Integer
 * @param {number=} radix The radix in which the text is written (2-36), defaults to 10
 * @returns {!Integer} The corresponding Integer value
 * @expose
 */
Integer.fromString = function (str, radix) {
  if (str.length === 0) throw (0, _error.newError)('number format error: empty string');
  if (str === "NaN" || str === "Infinity" || str === "+Infinity" || str === "-Infinity") return Integer.ZERO;
  radix = radix || 10;
  if (radix < 2 || 36 < radix) throw (0, _error.newError)('radix out of range: ' + radix);

  var p;
  if ((p = str.indexOf('-')) > 0) throw (0, _error.newError)('number format error: interior "-" character: ' + str);else if (p === 0) return Integer.fromString(str.substring(1), radix).negate();

  // Do several (8) digits each time through the loop, so as to
  // minimize the calls to the very expensive emulated div.
  var radixToPower = Integer.fromNumber(Math.pow(radix, 8));

  var result = Integer.ZERO;
  for (var i = 0; i < str.length; i += 8) {
    var size = Math.min(8, str.length - i);
    var value = parseInt(str.substring(i, i + size), radix);
    if (size < 8) {
      var power = Integer.fromNumber(Math.pow(radix, size));
      result = result.multiply(power).add(Integer.fromNumber(value));
    } else {
      result = result.multiply(radixToPower);
      result = result.add(Integer.fromNumber(value));
    }
  }
  return result;
};

/**
 * Converts the specified value to a Integer.
 * @access private
 * @param {!Integer|number|string|!{low: number, high: number}} val Value
 * @returns {!Integer}
 * @expose
 */
Integer.fromValue = function (val) {
  if (val /* is compatible */ instanceof Integer) return val;
  if (typeof val === 'number') return Integer.fromNumber(val);
  if (typeof val === 'string') return Integer.fromString(val);
  // Throws for non-objects, converts non-instanceof Integer:
  return new Integer(val.low, val.high);
};

/**
 * Converts the specified value to a number.
 * @access private
 * @param {!Integer|number|string|!{low: number, high: number}} val Value
 * @returns {number}
 * @expose
 */
Integer.toNumber = function (val) {
  return Integer.fromValue(val).toNumber();
};

/**
* Converts the specified value to a string.
* @access private
* @param {!Integer|number|string|!{low: number, high: number}} val Value
* @param {number} radix optional radix for string conversion, defaults to 10
* @returns {String}
* @expose
*/
Integer.toString = function (val, radix) {
  return Integer.fromValue(val).toString(radix);
};

/**
 * Checks if the given value is in the safe range in order to be converted to a native number
 * @access private
 * @param {!Integer|number|string|!{low: number, high: number}} val Value
 * @param {number} radix optional radix for string conversion, defaults to 10
 * @returns {boolean}
 * @expose
 */
Integer.inSafeRange = function (val) {
  return Integer.fromValue(val).inSafeRange();
};

/**
 * @type {number}
 * @const
 * @inner
 * @private
 */
var TWO_PWR_16_DBL = 1 << 16;

/**
 * @type {number}
 * @const
 * @inner
 * @private
 */
var TWO_PWR_24_DBL = 1 << 24;

/**
 * @type {number}
 * @const
 * @inner
 * @private
 */
var TWO_PWR_32_DBL = TWO_PWR_16_DBL * TWO_PWR_16_DBL;

/**
 * @type {number}
 * @const
 * @inner
 * @private
 */
var TWO_PWR_64_DBL = TWO_PWR_32_DBL * TWO_PWR_32_DBL;

/**
 * @type {number}
 * @const
 * @inner
 * @private
 */
var TWO_PWR_63_DBL = TWO_PWR_64_DBL / 2;

/**
 * @type {!Integer}
 * @const
 * @inner
 * @private
 */
var TWO_PWR_24 = Integer.fromInt(TWO_PWR_24_DBL);

/**
 * Signed zero.
 * @type {!Integer}
 * @expose
 */
Integer.ZERO = Integer.fromInt(0);

/**
 * Signed one.
 * @type {!Integer}
 * @expose
 */
Integer.ONE = Integer.fromInt(1);

/**
 * Signed negative one.
 * @type {!Integer}
 * @expose
 */
Integer.NEG_ONE = Integer.fromInt(-1);

/**
 * Maximum signed value.
 * @type {!Integer}
 * @expose
 */
Integer.MAX_VALUE = Integer.fromBits(0xFFFFFFFF | 0, 0x7FFFFFFF | 0, false);

/**
 * Minimum signed value.
 * @type {!Integer}
 * @expose
 */
Integer.MIN_VALUE = Integer.fromBits(0, 0x80000000 | 0, false);

/**
 * Minimum safe value.
 * @type {!Integer}
 * @expose
 */
Integer.MIN_SAFE_VALUE = Integer.fromBits(0x1 | 0, 0xFFFFFFFFFFE00000 | 0);

/**
* Maximum safe value.
* @type {!Integer}
* @expose
*/
Integer.MAX_SAFE_VALUE = Integer.fromBits(0xFFFFFFFF | 0, 0x1FFFFF | 0);

/**
 * Cast value to Integer type.
 * @access public
 * @param {Mixed} value - The value to use.
 * @return {Integer} - An object of type Integer.
 */
var int = Integer.fromValue;

/**
 * Check if a variable is of Integer type.
 * @access public
 * @param {Mixed} value - The variable to check.
 * @return {Boolean} - Is it of the Integer type?
 */
var isInt = Integer.isInteger;

/**
 * Check if a variable can be safely converted to a number
 * @access public
 * @param {Mixed} value - The variable to check
 * @return {Boolean} - true if it is safe to call toNumber on variable otherwise false
 */
var inSafeRange = Integer.inSafeRange;

/**
 * Converts a variable to a number
 * @access public
 * @param {Mixed} value - The variable to convert
 * @return {number} - the variable as a number
 */
var toNumber = Integer.toNumber;

/**
 * Converts the integer to a string representation
 * @access public
 * @param {Mixed} value - The variable to convert
 * @param {number} radix - radix to use in string conversion, defaults to 10
 * @return {String} - returns a string representation of the integer
 */
var toString = Integer.toString;

exports.int = int;
exports.isInt = isInt;
exports.inSafeRange = inSafeRange;
exports.toNumber = toNumber;
exports.toString = toString;
exports.default = Integer;