gecko/js/tests/js1_7/geniter/fibonacci-matrix-generator.js

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is JavaScript Engine testing utilities.
*
* The Initial Developer of the Original Code is
* Jeff Walden.
* Portions created by the Initial Developer are Copyright (C) 2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
//-----------------------------------------------------------------------------
var bug = "(none)";
var summary = "Fibonacci generator by matrix multiplication";
var actual, expect;
printBugNumber(bug);
printStatus(summary);
/**************
* BEGIN TEST *
**************/
function fib()
{
var init = [1, 0];
var mx = [[1, 1], [1, 0]];
while (true)
{
yield init[1];
var tmp = [,];
tmp[0] =
mx[0][0]*init[0] + mx[0][1]*init[1];
tmp[1] =
mx[1][0]*init[0] + mx[1][1]*init[1];
init = tmp;
}
}
var failed = false;
var it = fib();
try
{
if (it.next() != 0)
throw "F_0 failed";
if (it.next() != 1)
throw "F_1 failed";
if (it.next() != 1)
throw "F_2 failed";
if (it.next() != 2)
throw "F_3 failed";
if (it.next() != 3)
throw "F_4 failed";
if (it.next() != 5)
throw "F_5 failed";
if (it.next() != 8)
throw "F_6 failed";
}
catch (e)
{
failed = e;
}
expect = false;
actual = failed;
reportCompare(expect, actual, summary);