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Add support for double / float to EndianStream 

Also add new unit tests for endian::Writer

llvm-svn: 228269
This commit is contained in:
Matt Arsenault 2015-02-05 03:30:08 +00:00
parent d67bcb5f5c
commit d931642cc7
3 changed files with 183 additions and 0 deletions
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25
llvm/include/llvm/Support/EndianStream.h
View File

@ -31,6 +31,31 @@ template <endianness endian> struct Writer {
OS.write((const char *)&Val, sizeof(value_type));
}
};
template <>
template <>
inline void Writer<little>::write<float>(float Val) {
write(FloatToBits(Val));
}
template <>
template <>
inline void Writer<little>::write<double>(double Val) {
write(DoubleToBits(Val));
}
template <>
template <>
inline void Writer<big>::write<float>(float Val) {
write(FloatToBits(Val));
}
template <>
template <>
inline void Writer<big>::write<double>(double Val) {
write(DoubleToBits(Val));
}
} // end namespace endian
} // end namespace support

1
llvm/unittests/Support/CMakeLists.txt
View File

@ -14,6 +14,7 @@ add_llvm_unittest(SupportTests
ConvertUTFTest.cpp
DataExtractorTest.cpp
DwarfTest.cpp
EndianStreamTest.cpp
EndianTest.cpp
ErrorOrTest.cpp
FileOutputBufferTest.cpp

157
llvm/unittests/Support/EndianStreamTest.cpp Normal file
View File

@ -0,0 +1,157 @@
//===- unittests/Support/EndianStreamTest.cpp - EndianStream.h tests ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/EndianStream.h"
#include "llvm/Support/DataTypes.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace support;
namespace {
TEST(EndianStream, WriteInt32LE) {
SmallString<16> data;
{
raw_svector_ostream OS(data);
endian::Writer<little> LE(OS);
LE.write(static_cast<int32_t>(-1362446643));
}
EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xCD);
EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xB6);
EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xCA);
EXPECT_EQ(static_cast<uint8_t>(data[3]), 0xAE);
}
TEST(EndianStream, WriteInt32BE) {
SmallVector<char, 16> data;
{
raw_svector_ostream OS(data);
endian::Writer<big> BE(OS);
BE.write(static_cast<int32_t>(-1362446643));
}
EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xAE);
EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xCA);
EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xB6);
EXPECT_EQ(static_cast<uint8_t>(data[3]), 0xCD);
}
TEST(EndianStream, WriteFloatLE) {
SmallString<16> data;
{
raw_svector_ostream OS(data);
endian::Writer<little> LE(OS);
LE.write(12345.0f);
}
EXPECT_EQ(static_cast<uint8_t>(data[0]), 0x00);
EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xE4);
EXPECT_EQ(static_cast<uint8_t>(data[2]), 0x40);
EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x46);
}
TEST(EndianStream, WriteFloatBE) {
SmallVector<char, 16> data;
{
raw_svector_ostream OS(data);
endian::Writer<big> BE(OS);
BE.write(12345.0f);
}
EXPECT_EQ(static_cast<uint8_t>(data[0]), 0x46);
EXPECT_EQ(static_cast<uint8_t>(data[1]), 0x40);
EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xE4);
EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x00);
}
TEST(EndianStream, WriteInt64LE) {
SmallString<16> data;
{
raw_svector_ostream OS(data);
endian::Writer<little> LE(OS);
LE.write(static_cast<int64_t>(-136244664332342323));
}
EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xCD);
EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xAB);
EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xED);
EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x1B);
EXPECT_EQ(static_cast<uint8_t>(data[4]), 0x33);
EXPECT_EQ(static_cast<uint8_t>(data[5]), 0xF6);
EXPECT_EQ(static_cast<uint8_t>(data[6]), 0x1B);
EXPECT_EQ(static_cast<uint8_t>(data[7]), 0xFE);
}
TEST(EndianStream, WriteInt64BE) {
SmallVector<char, 16> data;
{
raw_svector_ostream OS(data);
endian::Writer<big> BE(OS);
BE.write(static_cast<int64_t>(-136244664332342323));
}
EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xFE);
EXPECT_EQ(static_cast<uint8_t>(data[1]), 0x1B);
EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xF6);
EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x33);
EXPECT_EQ(static_cast<uint8_t>(data[4]), 0x1B);
EXPECT_EQ(static_cast<uint8_t>(data[5]), 0xED);
EXPECT_EQ(static_cast<uint8_t>(data[6]), 0xAB);
EXPECT_EQ(static_cast<uint8_t>(data[7]), 0xCD);
}
TEST(EndianStream, WriteDoubleLE) {
SmallString<16> data;
{
raw_svector_ostream OS(data);
endian::Writer<little> LE(OS);
LE.write(-2349214918.58107);
}
EXPECT_EQ(static_cast<uint8_t>(data[0]), 0x20);
EXPECT_EQ(static_cast<uint8_t>(data[1]), 0x98);
EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xD2);
EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x98);
EXPECT_EQ(static_cast<uint8_t>(data[4]), 0xC5);
EXPECT_EQ(static_cast<uint8_t>(data[5]), 0x80);
EXPECT_EQ(static_cast<uint8_t>(data[6]), 0xE1);
EXPECT_EQ(static_cast<uint8_t>(data[7]), 0xC1);
}
TEST(EndianStream, WriteDoubleBE) {
SmallVector<char, 16> data;
{
raw_svector_ostream OS(data);
endian::Writer<big> BE(OS);
BE.write(-2349214918.58107);
}
EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xC1);
EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xE1);
EXPECT_EQ(static_cast<uint8_t>(data[2]), 0x80);
EXPECT_EQ(static_cast<uint8_t>(data[3]), 0xC5);
EXPECT_EQ(static_cast<uint8_t>(data[4]), 0x98);
EXPECT_EQ(static_cast<uint8_t>(data[5]), 0xD2);
EXPECT_EQ(static_cast<uint8_t>(data[6]), 0x98);
EXPECT_EQ(static_cast<uint8_t>(data[7]), 0x20);
}
} // end anon namespace