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Edit File: compare.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 MaxLT(x, y) { if (x < y) return y; return x; } function MaxLE(x, y) { if (x <= y) return y; return x; } function MaxGE(x, y) { if (x >= y) return x; return y; } function MaxGT(x, y) { if (x > y) return x; return y; } // First test primitive values. function TestPrimitive(max, x, y) { assertEquals(max, MaxLT(x, y), "MaxLT - primitive"); assertEquals(max, MaxLE(x, y), "MaxLE - primitive"); assertEquals(max, MaxGE(x, y), "MaxGE - primitive"); assertEquals(max, MaxGT(x, y), "MaxGT - primitive"); } TestPrimitive(1, 0, 1); TestPrimitive(1, 1, 0); TestPrimitive(4, 3, 4); TestPrimitive(4, 4, 3); TestPrimitive(0, -1, 0); TestPrimitive(0, 0, -1) TestPrimitive(-2, -2, -3); TestPrimitive(-2, -3, -2); TestPrimitive(1, 0.1, 1); TestPrimitive(1, 1, 0.1); TestPrimitive(4, 3.1, 4); TestPrimitive(4, 4, 3.1); TestPrimitive(0, -1.1, 0); TestPrimitive(0, 0, -1.1) TestPrimitive(-2, -2, -3.1); TestPrimitive(-2, -3.1, -2); // Test non-primitive values and watch for valueOf call order. function TestNonPrimitive(order, f) { var result = ""; var x = { valueOf: function() { result += "x"; } }; var y = { valueOf: function() { result += "y"; } }; f(x, y); assertEquals(order, result); } TestNonPrimitive("xy", MaxLT); TestNonPrimitive("xy", MaxLE); TestNonPrimitive("xy", MaxGE); TestNonPrimitive("xy", MaxGT); // Test compare in case of aliased registers. function CmpX(x) { if (x == x) return 42; } assertEquals(42, CmpX(0)); function CmpXY(x) { var y = x; if (x == y) return 42; } assertEquals(42, CmpXY(0)); // Test compare against null. function CmpNullValue(x) { return x == null; } assertEquals(false, CmpNullValue(42)); function CmpNullTest(x) { if (x == null) return 42; return 0; } assertEquals(42, CmpNullTest(null)); var g1 = 0; function CmpNullEffect() { (g1 = 42) == null; } CmpNullEffect(); assertEquals(42, g1);