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Add IsAligned helper for values

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This commit is contained in:
Austin Eng
2017-08-17 14:02:16 -04:00
committed by Austin Eng
parent d37ec9af92
commit ae48c95306
4 changed files with 42 additions and 7 deletions
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32
src/tests/unittests/MathTests.cpp
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@@ -94,8 +94,8 @@ TEST(Math, Align) {
}
}
// Tests for IsAligned
TEST(Math, IsAligned) {
// Tests for IsPtrAligned
TEST(Math, IsPtrAligned) {
constexpr size_t kTestAlignment = 8;
char buffer[kTestAlignment * 4];
@@ -104,6 +104,32 @@ TEST(Math, IsAligned) {
char* unaligned = &buffer[i];
char* aligned = AlignPtr(unaligned, kTestAlignment);
ASSERT_EQ(IsAligned(unaligned, kTestAlignment), unaligned == aligned);
ASSERT_EQ(IsPtrAligned(unaligned, kTestAlignment), unaligned == aligned);
}
}
// Tests for IsAligned
TEST(Math, IsAligned) {
// 0 is aligned
ASSERT_TRUE(IsAligned(0, 4));
ASSERT_TRUE(IsAligned(0, 256));
ASSERT_TRUE(IsAligned(0, 512));
// Multiples are aligned
ASSERT_TRUE(IsAligned(8, 8));
ASSERT_TRUE(IsAligned(16, 8));
ASSERT_TRUE(IsAligned(24, 8));
ASSERT_TRUE(IsAligned(256, 256));
ASSERT_TRUE(IsAligned(512, 256));
ASSERT_TRUE(IsAligned(768, 256));
// Alignment with 1 is always aligned
for (uint32_t i = 0; i < 128; ++i) {
ASSERT_TRUE(IsAligned(i, 1));
}
// Everything in the range (align, 2*align) is not aligned
for (uint32_t i = 1; i < 64; ++i) {
ASSERT_FALSE(IsAligned(64 + i, 64));
}
}