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Adding llvm::sys::swapByteOrder() for the common use-case of byte-swapping a value in place

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210976 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Artyom Skrobov 2014-06-14 12:52:55 +00:00
parent 9bb92cb537
commit 25e659b6ff
2 changed files with 53 additions and 0 deletions
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5
include/llvm/Support/SwapByteOrder.h
View File

@ -95,6 +95,11 @@ inline signed long long getSwappedBytes(signed long long C) {
return SwapByteOrder_64(C);
}
template<typename T>
inline void swapByteOrder(T &Value) {
Value = getSwappedBytes(Value);
}
} // end namespace sys
} // end namespace llvm

48
unittests/Support/SwapByteOrderTest.cpp
View File

@ -125,4 +125,52 @@ TEST(getSwappedBytes, int64_t) {
sys::getSwappedBytes(int64_t(0x8877665544332211LL)));
}
TEST(swapByteOrder, uint8_t) {
uint8_t value = 0x11;
sys::swapByteOrder(value);
EXPECT_EQ(uint8_t(0x11), value);
}
TEST(swapByteOrder, uint16_t) {
uint16_t value = 0x2211;
sys::swapByteOrder(value);
EXPECT_EQ(uint16_t(0x1122), value);
}
TEST(swapByteOrder, uint32_t) {
uint32_t value = 0x44332211;
sys::swapByteOrder(value);
EXPECT_EQ(uint32_t(0x11223344), value);
}
TEST(swapByteOrder, uint64_t) {
uint64_t value = 0x8877665544332211ULL;
sys::swapByteOrder(value);
EXPECT_EQ(uint64_t(0x1122334455667788ULL), value);
}
TEST(swapByteOrder, int8_t) {
int8_t value = 0x11;
sys::swapByteOrder(value);
EXPECT_EQ(int8_t(0x11), value);
}
TEST(swapByteOrder, int16_t) {
int16_t value = 0x2211;
sys::swapByteOrder(value);
EXPECT_EQ(int16_t(0x1122), value);
}
TEST(swapByteOrder, int32_t) {
int32_t value = 0x44332211;
sys::swapByteOrder(value);
EXPECT_EQ(int32_t(0x11223344), value);
}
TEST(swapByteOrder, int64_t) {
int64_t value = 0x8877665544332211LL;
sys::swapByteOrder(value);
EXPECT_EQ(int64_t(0x1122334455667788LL), value);
}
}