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/*
* Copyright (c) 2012 Google Inc. All rights reserved.
* Copyright (c) 2021 Apple 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)
{
EXPECT_EQ(0, saturatedSum<int32_t>(0, 0));
EXPECT_EQ(1, saturatedSum<int32_t>(0, 1));
EXPECT_EQ(100, saturatedSum<int32_t>(0, 100));
EXPECT_EQ(150, saturatedSum<int32_t>(100, 50));
EXPECT_EQ(-1, saturatedSum<int32_t>(0, -1));
EXPECT_EQ(0, saturatedSum<int32_t>(1, -1));
EXPECT_EQ(50, saturatedSum<int32_t>(100, -50));
EXPECT_EQ(-50, saturatedSum<int32_t>(50, -100));
EXPECT_EQ(INT_MAX - 1, saturatedSum<int32_t>(INT_MAX - 1, 0));
EXPECT_EQ(INT_MAX, saturatedSum<int32_t>(INT_MAX - 1, 1));
EXPECT_EQ(INT_MAX, saturatedSum<int32_t>(INT_MAX - 1, 2));
EXPECT_EQ(INT_MAX - 1, saturatedSum<int32_t>(0, INT_MAX - 1));
EXPECT_EQ(INT_MAX, saturatedSum<int32_t>(1, INT_MAX - 1));
EXPECT_EQ(INT_MAX, saturatedSum<int32_t>(2, INT_MAX - 1));
EXPECT_EQ(INT_MAX, saturatedSum<int32_t>(INT_MAX - 1, INT_MAX - 1));
EXPECT_EQ(INT_MAX, saturatedSum<int32_t>(INT_MAX, INT_MAX));
EXPECT_EQ(INT_MIN, saturatedSum<int32_t>(INT_MIN, 0));
EXPECT_EQ(INT_MIN + 1, saturatedSum<int32_t>(INT_MIN + 1, 0));
EXPECT_EQ(INT_MIN + 2, saturatedSum<int32_t>(INT_MIN + 1, 1));
EXPECT_EQ(INT_MIN + 3, saturatedSum<int32_t>(INT_MIN + 1, 2));
EXPECT_EQ(INT_MIN, saturatedSum<int32_t>(INT_MIN + 1, -1));
EXPECT_EQ(INT_MIN, saturatedSum<int32_t>(INT_MIN + 1, -2));
EXPECT_EQ(INT_MIN + 1, saturatedSum<int32_t>(0, INT_MIN + 1));
EXPECT_EQ(INT_MIN, saturatedSum<int32_t>(-1, INT_MIN + 1));
EXPECT_EQ(INT_MIN, saturatedSum<int32_t>(-2, INT_MIN + 1));
EXPECT_EQ(INT_MAX / 2 + 10000, saturatedSum<int32_t>(INT_MAX / 2, 10000));
EXPECT_EQ(INT_MAX, saturatedSum<int32_t>(INT_MAX / 2 + 1, INT_MAX / 2 + 1));
EXPECT_EQ(-1, saturatedSum<int32_t>(INT_MIN, INT_MAX));
EXPECT_EQ(0U, saturatedSum<uint32_t>(0U, 0U));
EXPECT_EQ(1U, saturatedSum<uint32_t>(0U, 1U));
EXPECT_EQ(100U, saturatedSum<uint32_t>(0U, 100U));
EXPECT_EQ(150U, saturatedSum<uint32_t>(100U, 50U));
EXPECT_EQ(UINT_MAX - 1, saturatedSum<uint32_t>(UINT_MAX - 1U, 0U));
EXPECT_EQ(UINT_MAX, saturatedSum<uint32_t>(UINT_MAX - 1U, 1U));
EXPECT_EQ(UINT_MAX, saturatedSum<uint32_t>(UINT_MAX - 1U, 2U));
EXPECT_EQ(UINT_MAX - 1, saturatedSum<uint32_t>(0U, UINT_MAX - 1U));
EXPECT_EQ(UINT_MAX, saturatedSum<uint32_t>(1U, UINT_MAX - 1U));
EXPECT_EQ(UINT_MAX, saturatedSum<uint32_t>(2U, UINT_MAX - 1U));
EXPECT_EQ(UINT_MAX, saturatedSum<uint32_t>(UINT_MAX - 1U, UINT_MAX - 1U));
EXPECT_EQ(UINT_MAX, saturatedSum<uint32_t>(UINT_MAX, UINT_MAX));
EXPECT_EQ(UINT_MAX / 2 + 10000, saturatedSum<uint32_t>(UINT_MAX / 2U, 10000U));
EXPECT_EQ(UINT_MAX, saturatedSum<uint32_t>(UINT_MAX / 2U, UINT_MAX / 2U + 1U));
EXPECT_EQ(UINT_MAX, saturatedSum<uint32_t>(UINT_MAX / 2U + 1U, UINT_MAX / 2U + 1U));
EXPECT_EQ(UINT_MAX, saturatedSum<uint32_t>(UINT_MAX / 3U + 1U, UINT_MAX / 3U, UINT_MAX / 3U));
EXPECT_EQ(UINT_MAX, saturatedSum<uint32_t>(UINT_MAX / 3U + 1U, UINT_MAX / 3U + 1U, UINT_MAX / 3U + 1U));
}
TEST(WTF, SaturatedArithmeticSubtraction)
{
EXPECT_EQ(0, saturatedDifference<int32_t>(0, 0));
EXPECT_EQ(-1, saturatedDifference<int32_t>(0, 1));
EXPECT_EQ(-100, saturatedDifference<int32_t>(0, 100));
EXPECT_EQ(50, saturatedDifference<int32_t>(100, 50));
EXPECT_EQ(1, saturatedDifference<int32_t>(0, -1));
EXPECT_EQ(2, saturatedDifference<int32_t>(1, -1));
EXPECT_EQ(150, saturatedDifference<int32_t>(100, -50));
EXPECT_EQ(150, saturatedDifference<int32_t>(50, -100));
EXPECT_EQ(INT_MAX, saturatedDifference<int32_t>(INT_MAX, 0));
EXPECT_EQ(INT_MAX - 1, saturatedDifference<int32_t>(INT_MAX, 1));
EXPECT_EQ(INT_MAX - 1, saturatedDifference<int32_t>(INT_MAX - 1, 0));
EXPECT_EQ(INT_MAX, saturatedDifference<int32_t>(INT_MAX - 1, -1));
EXPECT_EQ(INT_MAX, saturatedDifference<int32_t>(INT_MAX - 1, -2));
EXPECT_EQ(-INT_MAX + 1, saturatedDifference<int32_t>(0, INT_MAX - 1));
EXPECT_EQ(-INT_MAX, saturatedDifference<int32_t>(-1, INT_MAX - 1));
EXPECT_EQ(-INT_MAX - 1, saturatedDifference<int32_t>(-2, INT_MAX - 1));
EXPECT_EQ(-INT_MAX - 1, saturatedDifference<int32_t>(-3, INT_MAX - 1));
EXPECT_EQ(INT_MIN, saturatedDifference<int32_t>(INT_MIN, 0));
EXPECT_EQ(INT_MIN + 1, saturatedDifference<int32_t>(INT_MIN + 1, 0));
EXPECT_EQ(INT_MIN, saturatedDifference<int32_t>(INT_MIN + 1, 1));
EXPECT_EQ(INT_MIN, saturatedDifference<int32_t>(INT_MIN + 1, 2));
EXPECT_EQ(0, saturatedDifference<int32_t>(INT_MIN, INT_MIN));
EXPECT_EQ(0, saturatedDifference<int32_t>(INT_MAX, INT_MAX));
EXPECT_EQ(INT_MAX, saturatedDifference<int32_t>(INT_MAX, INT_MIN));
}
} // namespace TestWebKitAPI
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