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/*
 * Copyright 2016 The Closure Compiler Authors.
 *
 * 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.
 */

'require util/polyfill';

$jscomp.polyfill('Math.log1p', function(orig) {
  if (orig) return orig;

  /**
   * Returns the natural logarithm of 1+x, implemented in a way that is
   * accurate for numbers close to zero.
   *
   * 

Polyfills the static function Math.log1p(). * * @param {number} x Any number, or value that can be coerced to a number. * @return {number} The natural log of 1+x. */ var polyfill = function(x) { // This implementation is based on the Taylor expansion // log(1 + x) ~ x - x^2/2 + x^3/3 - x^4/4 + x^5/5 - ... x = Number(x); if (x < 0.25 && x > -0.25) { var y = x; var d = 1; var z = x; var zPrev = 0; var s = 1; while (zPrev != z) { y *= x; s *= -1; z = (zPrev = z) + s * y / (++d); } return z; } return Math.log(1 + x); }; return polyfill; }, 'es6', 'es3');





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