| /* |
| * Copyright (c) 2012, Google Inc. 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. |
| */ |
| |
| #include "config.h" |
| #include "limits.h" |
| #include <wtf/SaturatedArithmetic.h> |
| |
| namespace TestWebKitAPI { |
| |
| TEST(WTF, SaturatedArithmeticAddition) |
| { |
| ASSERT_EQ(saturatedAddition(0, 0), 0); |
| ASSERT_EQ(saturatedAddition(0, 1), 1); |
| ASSERT_EQ(saturatedAddition(0, 100), 100); |
| ASSERT_EQ(saturatedAddition(100, 50), 150); |
| |
| ASSERT_EQ(saturatedAddition(0, -1), -1); |
| ASSERT_EQ(saturatedAddition(1, -1), 0); |
| ASSERT_EQ(saturatedAddition(100, -50), 50); |
| ASSERT_EQ(saturatedAddition(50, -100), -50); |
| |
| ASSERT_EQ(saturatedAddition(INT_MAX - 1, 0), INT_MAX - 1); |
| ASSERT_EQ(saturatedAddition(INT_MAX - 1, 1), INT_MAX); |
| ASSERT_EQ(saturatedAddition(INT_MAX - 1, 2), INT_MAX); |
| ASSERT_EQ(saturatedAddition(0, INT_MAX - 1), INT_MAX - 1); |
| ASSERT_EQ(saturatedAddition(1, INT_MAX - 1), INT_MAX); |
| ASSERT_EQ(saturatedAddition(2, INT_MAX - 1), INT_MAX); |
| ASSERT_EQ(saturatedAddition(INT_MAX - 1, INT_MAX - 1), INT_MAX); |
| ASSERT_EQ(saturatedAddition(INT_MAX, INT_MAX), INT_MAX); |
| |
| ASSERT_EQ(saturatedAddition(INT_MIN, 0), INT_MIN); |
| ASSERT_EQ(saturatedAddition(INT_MIN + 1, 0), INT_MIN + 1); |
| ASSERT_EQ(saturatedAddition(INT_MIN + 1, 1), INT_MIN + 2); |
| ASSERT_EQ(saturatedAddition(INT_MIN + 1, 2), INT_MIN + 3); |
| ASSERT_EQ(saturatedAddition(INT_MIN + 1, -1), INT_MIN); |
| ASSERT_EQ(saturatedAddition(INT_MIN + 1, -2), INT_MIN); |
| ASSERT_EQ(saturatedAddition(0, INT_MIN + 1), INT_MIN + 1); |
| ASSERT_EQ(saturatedAddition(-1, INT_MIN + 1), INT_MIN); |
| ASSERT_EQ(saturatedAddition(-2, INT_MIN + 1), INT_MIN); |
| |
| ASSERT_EQ(saturatedAddition(INT_MAX / 2, 10000), INT_MAX / 2 + 10000); |
| ASSERT_EQ(saturatedAddition(INT_MAX / 2 + 1, INT_MAX / 2 + 1), INT_MAX); |
| ASSERT_EQ(saturatedAddition(INT_MIN, INT_MAX), -1); |
| } |
| |
| TEST(WTF, SaturatedArithmeticSubtraction) |
| { |
| ASSERT_EQ(saturatedSubtraction(0, 0), 0); |
| ASSERT_EQ(saturatedSubtraction(0, 1), -1); |
| ASSERT_EQ(saturatedSubtraction(0, 100), -100); |
| ASSERT_EQ(saturatedSubtraction(100, 50), 50); |
| |
| ASSERT_EQ(saturatedSubtraction(0, -1), 1); |
| ASSERT_EQ(saturatedSubtraction(1, -1), 2); |
| ASSERT_EQ(saturatedSubtraction(100, -50), 150); |
| ASSERT_EQ(saturatedSubtraction(50, -100), 150); |
| |
| ASSERT_EQ(saturatedSubtraction(INT_MAX, 0), INT_MAX); |
| ASSERT_EQ(saturatedSubtraction(INT_MAX, 1), INT_MAX - 1); |
| ASSERT_EQ(saturatedSubtraction(INT_MAX - 1, 0), INT_MAX - 1); |
| ASSERT_EQ(saturatedSubtraction(INT_MAX - 1, -1), INT_MAX); |
| ASSERT_EQ(saturatedSubtraction(INT_MAX - 1, -2), INT_MAX); |
| ASSERT_EQ(saturatedSubtraction(0, INT_MAX - 1), -INT_MAX + 1); |
| ASSERT_EQ(saturatedSubtraction(-1, INT_MAX - 1), -INT_MAX); |
| ASSERT_EQ(saturatedSubtraction(-2, INT_MAX - 1), -INT_MAX - 1); |
| ASSERT_EQ(saturatedSubtraction(-3, INT_MAX - 1), -INT_MAX - 1); |
| |
| ASSERT_EQ(saturatedSubtraction(INT_MIN, 0), INT_MIN); |
| ASSERT_EQ(saturatedSubtraction(INT_MIN + 1, 0), INT_MIN + 1); |
| ASSERT_EQ(saturatedSubtraction(INT_MIN + 1, 1), INT_MIN); |
| ASSERT_EQ(saturatedSubtraction(INT_MIN + 1, 2), INT_MIN); |
| |
| ASSERT_EQ(saturatedSubtraction(INT_MIN, INT_MIN), 0); |
| ASSERT_EQ(saturatedSubtraction(INT_MAX, INT_MAX), 0); |
| ASSERT_EQ(saturatedSubtraction(INT_MAX, INT_MIN), INT_MAX); |
| } |
| |
| } // namespace TestWebKitAPI |
