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99 lines
3.3 KiB
JavaScript
Executable File
99 lines
3.3 KiB
JavaScript
Executable File
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is JavaScript Engine testing utilities.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2007
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s): Brendan Eich
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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var gTestfile = 'regress-363040-01.js';
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//-----------------------------------------------------------------------------
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var BUGNUMBER = 363040;
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var summary = 'Array.prototype.reduce application in continued fraction';
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var actual = '';
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var expect = '';
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//-----------------------------------------------------------------------------
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test();
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//-----------------------------------------------------------------------------
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function test()
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{
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enterFunc ('test');
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printBugNumber(BUGNUMBER);
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printStatus (summary);
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// Print x as a continued fraction in compact abbreviated notation and return
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// the convergent [n, d] such that x - (n / d) <= epsilon.
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function contfrac(x, epsilon) {
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let i = Math.floor(x);
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let a = [i];
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x = x - i;
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let maxerr = x;
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while (maxerr > epsilon) {
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x = 1 / x;
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i = Math.floor(x);
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a.push(i);
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x = x - i;
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maxerr = x * maxerr / i;
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}
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print(uneval(a));
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a.push([1, 0]);
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a.reverse();
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return a.reduce(function (x, y) {return [x[0] * y + x[1], x[0]];});
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}
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if (!Array.prototype.reduce)
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{
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print('Test skipped. Array.prototype.reduce not implemented');
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}
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else
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{
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// Show contfrac in action.
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for each (num in [Math.PI, Math.sqrt(2), 1 / (Math.sqrt(Math.E) - 1)]) {
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print('Continued fractions for', num);
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for each (eps in [1e-2, 1e-3, 1e-5, 1e-7, 1e-10]) {
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let frac = contfrac(num, eps);
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let est = frac[0] / frac[1];
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let err = num - est;
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print(uneval(frac), est, err);
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}
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print();
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}
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}
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reportCompare(expect, actual, summary);
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exitFunc ('test');
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}
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