neo4j-driver/lib/integer.js

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = exports.toString = exports.toNumber = exports.inSafeRange = exports.isInt = exports["int"] = void 0;

var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));

var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));

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

/**
 * Copyright (c) 2002-2019 "Neo4j,"
 * 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

/**
 * 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 `int()` function to create new integers, `isInt()` to check if given object is integer,
 * `inSafeRange()` to check if it is safe to convert given value to native number,
 * `toNumber()` and `toString()` 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
 */
var Integer =
/*#__PURE__*/
function () {
  function Integer(low, high) {
    (0, _classCallCheck2["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, _createClass2["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;
    }
    /**
     * Converts the Integer to a the nearest floating-point representation of this value (double, 53 bit mantissa).
     * @returns {number}
     * @expose
     */

  }, {
    key: "toNumber",
    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 || radix > 36) {
        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);
        var intval = rem.subtract(remDiv.multiply(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;
        }
      }
    }
    /**
     * 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;
    }
    /**
     * Tests if this Integer's value equals the specified's.
     * @param {!Integer|number|string} other Other value
     * @returns {boolean}
     * @expose
     */

  }, {
    key: "equals",
    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();
      var 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;
      var c32 = 0;
      var c16 = 0;
      var 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;
      var c32 = 0;
      var c16 = 0;
      var 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);
    }
    /**
     * Returns this Integer divided by the specified.
     * @param {!Integer|number|string} divisor Divisor
     * @returns {!Integer} Quotient
     * @expose
     */

  }, {
    key: "div",
    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;
        }

        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);
        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 = Integer.fromNumber(approx);
        var 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
 */


Integer.__isInteger__ = true;
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 (value >= -128 && value < 128) {
    cachedObj = INT_CACHE[value];

    if (cachedObj) {
      return cachedObj;
    }
  }

  obj = new Integer(value, value < 0 ? -1 : 0, false);

  if (value >= -128 && 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 || radix > 36) {
    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?
 */

exports["int"] = _int;
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
 */

exports.isInt = isInt;
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
 */

exports.inSafeRange = inSafeRange;
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
 */

exports.toNumber = toNumber;
var toString = Integer.toString;
exports.toString = toString;
var _default = Integer;
exports["default"] = _default;