2015-02-05 11:30:08 +08:00
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//===- unittests/Support/EndianStreamTest.cpp - EndianStream.h tests ------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/EndianStream.h"
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2017-06-06 19:06:56 +08:00
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#include "llvm/ADT/SmallString.h"
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2015-02-05 11:30:08 +08:00
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#include "llvm/Support/DataTypes.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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using namespace support;
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namespace {
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TEST(EndianStream, WriteInt32LE) {
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SmallString<16> data;
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{
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raw_svector_ostream OS(data);
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endian::Writer<little> LE(OS);
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LE.write(static_cast<int32_t>(-1362446643));
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}
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EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xCD);
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EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xB6);
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EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xCA);
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EXPECT_EQ(static_cast<uint8_t>(data[3]), 0xAE);
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}
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TEST(EndianStream, WriteInt32BE) {
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SmallVector<char, 16> data;
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{
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raw_svector_ostream OS(data);
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endian::Writer<big> BE(OS);
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BE.write(static_cast<int32_t>(-1362446643));
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}
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EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xAE);
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EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xCA);
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EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xB6);
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EXPECT_EQ(static_cast<uint8_t>(data[3]), 0xCD);
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}
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TEST(EndianStream, WriteFloatLE) {
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SmallString<16> data;
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{
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raw_svector_ostream OS(data);
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endian::Writer<little> LE(OS);
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LE.write(12345.0f);
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}
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EXPECT_EQ(static_cast<uint8_t>(data[0]), 0x00);
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EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xE4);
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EXPECT_EQ(static_cast<uint8_t>(data[2]), 0x40);
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EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x46);
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}
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TEST(EndianStream, WriteFloatBE) {
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SmallVector<char, 16> data;
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{
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raw_svector_ostream OS(data);
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endian::Writer<big> BE(OS);
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BE.write(12345.0f);
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}
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EXPECT_EQ(static_cast<uint8_t>(data[0]), 0x46);
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EXPECT_EQ(static_cast<uint8_t>(data[1]), 0x40);
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EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xE4);
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EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x00);
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}
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TEST(EndianStream, WriteInt64LE) {
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SmallString<16> data;
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{
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raw_svector_ostream OS(data);
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endian::Writer<little> LE(OS);
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LE.write(static_cast<int64_t>(-136244664332342323));
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}
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EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xCD);
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EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xAB);
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EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xED);
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EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x1B);
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EXPECT_EQ(static_cast<uint8_t>(data[4]), 0x33);
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EXPECT_EQ(static_cast<uint8_t>(data[5]), 0xF6);
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EXPECT_EQ(static_cast<uint8_t>(data[6]), 0x1B);
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EXPECT_EQ(static_cast<uint8_t>(data[7]), 0xFE);
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}
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TEST(EndianStream, WriteInt64BE) {
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SmallVector<char, 16> data;
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{
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raw_svector_ostream OS(data);
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endian::Writer<big> BE(OS);
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BE.write(static_cast<int64_t>(-136244664332342323));
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}
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EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xFE);
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EXPECT_EQ(static_cast<uint8_t>(data[1]), 0x1B);
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EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xF6);
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EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x33);
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EXPECT_EQ(static_cast<uint8_t>(data[4]), 0x1B);
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EXPECT_EQ(static_cast<uint8_t>(data[5]), 0xED);
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EXPECT_EQ(static_cast<uint8_t>(data[6]), 0xAB);
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EXPECT_EQ(static_cast<uint8_t>(data[7]), 0xCD);
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}
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TEST(EndianStream, WriteDoubleLE) {
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SmallString<16> data;
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{
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raw_svector_ostream OS(data);
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endian::Writer<little> LE(OS);
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LE.write(-2349214918.58107);
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}
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EXPECT_EQ(static_cast<uint8_t>(data[0]), 0x20);
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EXPECT_EQ(static_cast<uint8_t>(data[1]), 0x98);
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EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xD2);
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EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x98);
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EXPECT_EQ(static_cast<uint8_t>(data[4]), 0xC5);
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EXPECT_EQ(static_cast<uint8_t>(data[5]), 0x80);
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EXPECT_EQ(static_cast<uint8_t>(data[6]), 0xE1);
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EXPECT_EQ(static_cast<uint8_t>(data[7]), 0xC1);
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}
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TEST(EndianStream, WriteDoubleBE) {
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SmallVector<char, 16> data;
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{
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raw_svector_ostream OS(data);
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endian::Writer<big> BE(OS);
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BE.write(-2349214918.58107);
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}
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EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xC1);
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EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xE1);
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EXPECT_EQ(static_cast<uint8_t>(data[2]), 0x80);
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EXPECT_EQ(static_cast<uint8_t>(data[3]), 0xC5);
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EXPECT_EQ(static_cast<uint8_t>(data[4]), 0x98);
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EXPECT_EQ(static_cast<uint8_t>(data[5]), 0xD2);
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EXPECT_EQ(static_cast<uint8_t>(data[6]), 0x98);
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EXPECT_EQ(static_cast<uint8_t>(data[7]), 0x20);
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}
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2016-01-23 03:44:46 +08:00
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TEST(EndianStream, WriteArrayLE) {
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SmallString<16> Data;
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{
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raw_svector_ostream OS(Data);
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endian::Writer<little> LE(OS);
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LE.write<uint16_t>({0x1234, 0x5678});
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}
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EXPECT_EQ(static_cast<uint8_t>(Data[0]), 0x34);
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EXPECT_EQ(static_cast<uint8_t>(Data[1]), 0x12);
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EXPECT_EQ(static_cast<uint8_t>(Data[2]), 0x78);
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EXPECT_EQ(static_cast<uint8_t>(Data[3]), 0x56);
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}
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TEST(EndianStream, WriteVectorLE) {
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SmallString<16> Data;
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{
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raw_svector_ostream OS(Data);
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endian::Writer<little> LE(OS);
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std::vector<uint16_t> Vec{0x1234, 0x5678};
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LE.write<uint16_t>(Vec);
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}
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EXPECT_EQ(static_cast<uint8_t>(Data[0]), 0x34);
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EXPECT_EQ(static_cast<uint8_t>(Data[1]), 0x12);
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EXPECT_EQ(static_cast<uint8_t>(Data[2]), 0x78);
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EXPECT_EQ(static_cast<uint8_t>(Data[3]), 0x56);
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}
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2015-02-05 11:30:08 +08:00
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2016-01-26 03:02:20 +08:00
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TEST(EndianStream, WriteFloatArrayLE) {
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SmallString<16> Data;
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{
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raw_svector_ostream OS(Data);
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endian::Writer<little> LE(OS);
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LE.write<float>({12345.0f, 12346.0f});
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}
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EXPECT_EQ(static_cast<uint8_t>(Data[0]), 0x00);
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EXPECT_EQ(static_cast<uint8_t>(Data[1]), 0xE4);
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EXPECT_EQ(static_cast<uint8_t>(Data[2]), 0x40);
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EXPECT_EQ(static_cast<uint8_t>(Data[3]), 0x46);
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EXPECT_EQ(static_cast<uint8_t>(Data[4]), 0x00);
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EXPECT_EQ(static_cast<uint8_t>(Data[5]), 0xE8);
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EXPECT_EQ(static_cast<uint8_t>(Data[6]), 0x40);
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EXPECT_EQ(static_cast<uint8_t>(Data[7]), 0x46);
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}
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2015-02-05 11:30:08 +08:00
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} // end anon namespace
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