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/*
* 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
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