JezK
Edit File: array-access.js
// Copyright 2010 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. function Get0(a) { return a[0]; } function GetN(a,n) { return a[n]; } function GetA0(a) { return a[a[0]]; } function GetAN(a,n) { return a[a[n]]; } function GetAAN(a,n) { return a[a[a[n]]]; } function RunGetTests() { var a = [2,0,1]; assertEquals(2, Get0(a)); assertEquals(2, GetN(a, 0)); assertEquals(0, GetN(a, 1)); assertEquals(1, GetN(a, 2)); assertEquals(1, GetA0(a)); assertEquals(1, GetAN(a,0)); assertEquals(2, GetAN(a,1)); assertEquals(0, GetAN(a,2)); assertEquals(0, GetAAN(a,0)); assertEquals(1, GetAAN(a,1)); assertEquals(2, GetAAN(a,2)); } function Set07(a) { a[0] = 7; } function Set0V(a, v) { a[0] = v; } function SetN7(a, n) { a[n] = 7; } function SetNX(a, n, x) { a[n] = x; } function RunSetTests(a) { Set07(a); assertEquals(7, a[0]); assertEquals(0, a[1]); assertEquals(0, a[2]); Set0V(a, 1); assertEquals(1, a[0]); assertEquals(0, a[1]); assertEquals(0, a[2]); SetN7(a, 2); assertEquals(1, a[0]); assertEquals(0, a[1]); assertEquals(7, a[2]); SetNX(a, 1, 5); assertEquals(1, a[0]); assertEquals(5, a[1]); assertEquals(7, a[2]); for (var i = 0; i < 3; i++) SetNX(a, i, 0); assertEquals(0, a[0]); assertEquals(0, a[1]); assertEquals(0, a[2]); } function RunArrayBoundsCheckTest() { var g = [1,2,3]; function f(a, i) { a[i] = 42; } for (var i = 0; i < 100000; i++) { f(g, 0); } f(g, 4); assertEquals(42, g[0]); assertEquals(42, g[4]); } var a = [0,0,0]; var o = {0: 0, 1: 0, 2: 0}; for (var i = 0; i < 1000; i++) { RunGetTests(); RunSetTests(a); RunSetTests(o); } RunArrayBoundsCheckTest();