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1 /* | 1 /* |
2 * Copyright (c) 2012, Google Inc. All rights reserved. | 2 * Copyright (c) 2012, Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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97 EXPECT_EQ(INT_MIN, saturatedSubtraction(INT_MIN, 0)); | 97 EXPECT_EQ(INT_MIN, saturatedSubtraction(INT_MIN, 0)); |
98 EXPECT_EQ(INT_MIN + 1, saturatedSubtraction(INT_MIN + 1, 0)); | 98 EXPECT_EQ(INT_MIN + 1, saturatedSubtraction(INT_MIN + 1, 0)); |
99 EXPECT_EQ(INT_MIN, saturatedSubtraction(INT_MIN + 1, 1)); | 99 EXPECT_EQ(INT_MIN, saturatedSubtraction(INT_MIN + 1, 1)); |
100 EXPECT_EQ(INT_MIN, saturatedSubtraction(INT_MIN + 1, 2)); | 100 EXPECT_EQ(INT_MIN, saturatedSubtraction(INT_MIN + 1, 2)); |
101 | 101 |
102 EXPECT_EQ(0, saturatedSubtraction(INT_MIN, INT_MIN)); | 102 EXPECT_EQ(0, saturatedSubtraction(INT_MIN, INT_MIN)); |
103 EXPECT_EQ(0, saturatedSubtraction(INT_MAX, INT_MAX)); | 103 EXPECT_EQ(0, saturatedSubtraction(INT_MAX, INT_MAX)); |
104 EXPECT_EQ(INT_MAX, saturatedSubtraction(INT_MAX, INT_MIN)); | 104 EXPECT_EQ(INT_MAX, saturatedSubtraction(INT_MAX, INT_MIN)); |
105 } | 105 } |
106 | 106 |
| 107 TEST(SaturatedArithmeticTest, SetSigned) |
| 108 { |
| 109 const int kFractionBits = 6; |
| 110 const int intMaxForLayoutUnit = INT_MAX >> kFractionBits; |
| 111 const int intMinForLayoutUnit = INT_MIN >> kFractionBits; |
| 112 |
| 113 EXPECT_EQ(0, saturatedSet(0, kFractionBits)); |
| 114 |
| 115 EXPECT_EQ(getMaxSaturatedSetResultForTesting(kFractionBits), |
| 116 saturatedSet(intMaxForLayoutUnit, kFractionBits)); |
| 117 |
| 118 EXPECT_EQ(getMaxSaturatedSetResultForTesting(kFractionBits), |
| 119 saturatedSet(intMaxForLayoutUnit + 100, kFractionBits)); |
| 120 |
| 121 EXPECT_EQ((intMaxForLayoutUnit - 100) << kFractionBits, |
| 122 saturatedSet(intMaxForLayoutUnit - 100, kFractionBits)); |
| 123 |
| 124 EXPECT_EQ(getMinSaturatedSetResultForTesting(kFractionBits), |
| 125 saturatedSet(intMinForLayoutUnit, kFractionBits)); |
| 126 |
| 127 EXPECT_EQ(getMinSaturatedSetResultForTesting(kFractionBits), |
| 128 saturatedSet(intMinForLayoutUnit - 100, kFractionBits)); |
| 129 |
| 130 EXPECT_EQ((intMinForLayoutUnit + 100) << kFractionBits, |
| 131 saturatedSet(intMinForLayoutUnit + 100, kFractionBits)); |
| 132 } |
| 133 |
| 134 TEST(SaturatedArithmeticTest, SetUnsigned) |
| 135 { |
| 136 const int kFractionBits = 6; |
| 137 const int intMaxForLayoutUnit = INT_MAX >> kFractionBits; |
| 138 |
| 139 EXPECT_EQ(0, saturatedSet((unsigned)0, kFractionBits)); |
| 140 |
| 141 EXPECT_EQ(getMaxSaturatedSetResultForTesting(kFractionBits), |
| 142 saturatedSet((unsigned)intMaxForLayoutUnit, kFractionBits)); |
| 143 |
| 144 EXPECT_EQ(getMaxSaturatedSetResultForTesting(kFractionBits), |
| 145 saturatedSet((unsigned)(intMaxForLayoutUnit+100), kFractionBits)); |
| 146 |
| 147 EXPECT_EQ((intMaxForLayoutUnit - 100) << kFractionBits, |
| 148 saturatedSet((unsigned)(intMaxForLayoutUnit - 100), kFractionBits)); |
| 149 } |
| 150 |
| 151 |
107 } // namespace | 152 } // namespace |
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