michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: var BUGNUMBER = 329383;
michael@0: var summary = 'Math copysign issues';
michael@0: var actual = '';
michael@0: var expect = '';
michael@0: 
michael@0: printBugNumber(BUGNUMBER);
michael@0: printStatus (summary);
michael@0: 
michael@0: var inputs = [
michael@0:   -Infinity,
michael@0:   -10.01,
michael@0:   -9.01,
michael@0:   -8.01,
michael@0:   -7.01,
michael@0:   -6.01,
michael@0:   -5.01,
michael@0:   -4.01,
michael@0:   -Math.PI,
michael@0:   -3.01,
michael@0:   -2.01,
michael@0:   -1.01,
michael@0:   -0.5,
michael@0:   -0.49,
michael@0:   -0.01,
michael@0:   -0,
michael@0:   0,
michael@0:   +0,
michael@0:   0.01,
michael@0:   0.49,
michael@0:   0.50,
michael@0:   0,
michael@0:   1.01,
michael@0:   2.01,
michael@0:   3.01,
michael@0:   Math.PI,
michael@0:   4.01,
michael@0:   5.01,
michael@0:   6.01,
michael@0:   7.01,
michael@0:   8.01,
michael@0:   9.01,
michael@0:   10.01,
michael@0:   Infinity
michael@0:   ];
michael@0: 
michael@0: var iinput;
michael@0: 
michael@0: for (iinput = 0; iinput < inputs.length; iinput++)
michael@0: {
michael@0:   var input = inputs[iinput];
michael@0:   reportCompare(Math.round(input),
michael@0:                 emulateRound(input),
michael@0:                 summary + ': Math.round(' + input + ')');
michael@0: }
michael@0: 
michael@0: reportCompare(isNaN(Math.round(NaN)),
michael@0:               isNaN(emulateRound(NaN)),
michael@0:               summary + ': Math.round(' + input + ')');
michael@0: 
michael@0: function emulateRound(x)
michael@0: {
michael@0:   if (!isFinite(x) || x === 0) return x
michael@0:     if (-0.5 <= x && x < 0) return -0
michael@0:       return Math.floor(x + 0.5)
michael@0:       }
michael@0: 
michael@0: var z;
michael@0: 
michael@0: z = Math.min(-0, 0);
michael@0: 
michael@0: reportCompare(-Math.PI, Math.atan2(z, z), summary + ': Math.atan2(-0, -0)');
michael@0: reportCompare(-Infinity, 1/z, summary + ': 1/-0');
michael@0: 
michael@0: z = Math.max(-0, 0);
michael@0: 
michael@0: reportCompare(0, Math.atan2(z, z), summary + ': Math.atan2(0, 0)');
michael@0: reportCompare(Infinity, 1/z, summary + ': 1/0');