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1 //===- unittests/Support/EndianStreamTest.cpp - EndianStream.h tests ------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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83
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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121
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9 #include "llvm/Support/EndianStream.h"
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10 #include "llvm/ADT/SmallString.h"
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11 #include "llvm/Support/DataTypes.h"
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12 #include "gtest/gtest.h"
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13 using namespace llvm;
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14 using namespace support;
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15
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16 namespace {
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17
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18 TEST(EndianStream, WriteInt32LE) {
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19 SmallString<16> data;
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20
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21 {
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22 raw_svector_ostream OS(data);
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23 endian::Writer LE(OS, little);
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24 LE.write(static_cast<int32_t>(-1362446643));
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25 }
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26
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27 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xCD);
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28 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xB6);
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29 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xCA);
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30 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0xAE);
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31 }
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32
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33 TEST(EndianStream, WriteInt32BE) {
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34 SmallVector<char, 16> data;
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35
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36 {
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37 raw_svector_ostream OS(data);
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38 endian::Writer BE(OS, big);
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39 BE.write(static_cast<int32_t>(-1362446643));
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40 }
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41
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42 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xAE);
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43 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xCA);
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44 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xB6);
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45 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0xCD);
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46 }
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47
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48
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49 TEST(EndianStream, WriteFloatLE) {
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50 SmallString<16> data;
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51
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52 {
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53 raw_svector_ostream OS(data);
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54 endian::Writer LE(OS, little);
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55 LE.write(12345.0f);
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56 }
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57
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58 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0x00);
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59 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xE4);
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60 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0x40);
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61 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x46);
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62 }
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63
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64 TEST(EndianStream, WriteFloatBE) {
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65 SmallVector<char, 16> data;
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66
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67 {
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68 raw_svector_ostream OS(data);
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69 endian::Writer BE(OS, big);
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70 BE.write(12345.0f);
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71 }
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72
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73 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0x46);
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74 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0x40);
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75 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xE4);
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76 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x00);
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77 }
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78
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79 TEST(EndianStream, WriteInt64LE) {
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80 SmallString<16> data;
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81
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82 {
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83 raw_svector_ostream OS(data);
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84 endian::Writer LE(OS, little);
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85 LE.write(static_cast<int64_t>(-136244664332342323));
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86 }
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87
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88 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xCD);
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89 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xAB);
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90 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xED);
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91 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x1B);
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92 EXPECT_EQ(static_cast<uint8_t>(data[4]), 0x33);
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93 EXPECT_EQ(static_cast<uint8_t>(data[5]), 0xF6);
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94 EXPECT_EQ(static_cast<uint8_t>(data[6]), 0x1B);
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95 EXPECT_EQ(static_cast<uint8_t>(data[7]), 0xFE);
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96 }
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97
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98 TEST(EndianStream, WriteInt64BE) {
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99 SmallVector<char, 16> data;
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100
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101 {
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102 raw_svector_ostream OS(data);
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103 endian::Writer BE(OS, big);
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104 BE.write(static_cast<int64_t>(-136244664332342323));
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105 }
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106
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107 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xFE);
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108 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0x1B);
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109 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xF6);
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110 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x33);
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111 EXPECT_EQ(static_cast<uint8_t>(data[4]), 0x1B);
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112 EXPECT_EQ(static_cast<uint8_t>(data[5]), 0xED);
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113 EXPECT_EQ(static_cast<uint8_t>(data[6]), 0xAB);
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114 EXPECT_EQ(static_cast<uint8_t>(data[7]), 0xCD);
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115 }
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116
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117 TEST(EndianStream, WriteDoubleLE) {
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118 SmallString<16> data;
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119
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120 {
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121 raw_svector_ostream OS(data);
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122 endian::Writer LE(OS, little);
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123 LE.write(-2349214918.58107);
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124 }
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125
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126 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0x20);
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127 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0x98);
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128 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xD2);
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129 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x98);
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130 EXPECT_EQ(static_cast<uint8_t>(data[4]), 0xC5);
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131 EXPECT_EQ(static_cast<uint8_t>(data[5]), 0x80);
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132 EXPECT_EQ(static_cast<uint8_t>(data[6]), 0xE1);
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133 EXPECT_EQ(static_cast<uint8_t>(data[7]), 0xC1);
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134 }
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135
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136 TEST(EndianStream, WriteDoubleBE) {
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137 SmallVector<char, 16> data;
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138
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139 {
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140 raw_svector_ostream OS(data);
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141 endian::Writer BE(OS, big);
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142 BE.write(-2349214918.58107);
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143 }
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144
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145 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xC1);
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146 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xE1);
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147 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0x80);
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148 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0xC5);
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149 EXPECT_EQ(static_cast<uint8_t>(data[4]), 0x98);
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150 EXPECT_EQ(static_cast<uint8_t>(data[5]), 0xD2);
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151 EXPECT_EQ(static_cast<uint8_t>(data[6]), 0x98);
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152 EXPECT_EQ(static_cast<uint8_t>(data[7]), 0x20);
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153 }
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154
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100
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155 TEST(EndianStream, WriteArrayLE) {
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156 SmallString<16> Data;
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157
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158 {
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159 raw_svector_ostream OS(Data);
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160 endian::Writer LE(OS, little);
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161 LE.write<uint16_t>({0x1234, 0x5678});
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162 }
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163
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164 EXPECT_EQ(static_cast<uint8_t>(Data[0]), 0x34);
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165 EXPECT_EQ(static_cast<uint8_t>(Data[1]), 0x12);
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166 EXPECT_EQ(static_cast<uint8_t>(Data[2]), 0x78);
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167 EXPECT_EQ(static_cast<uint8_t>(Data[3]), 0x56);
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168 }
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169
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170 TEST(EndianStream, WriteVectorLE) {
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171 SmallString<16> Data;
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172
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173 {
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174 raw_svector_ostream OS(Data);
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175 endian::Writer LE(OS, little);
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176 std::vector<uint16_t> Vec{0x1234, 0x5678};
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177 LE.write<uint16_t>(Vec);
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178 }
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179
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180 EXPECT_EQ(static_cast<uint8_t>(Data[0]), 0x34);
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181 EXPECT_EQ(static_cast<uint8_t>(Data[1]), 0x12);
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182 EXPECT_EQ(static_cast<uint8_t>(Data[2]), 0x78);
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183 EXPECT_EQ(static_cast<uint8_t>(Data[3]), 0x56);
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184 }
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185
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186 TEST(EndianStream, WriteFloatArrayLE) {
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187 SmallString<16> Data;
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188
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189 {
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190 raw_svector_ostream OS(Data);
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191 endian::Writer LE(OS, little);
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192 LE.write<float>({12345.0f, 12346.0f});
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193 }
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194
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195 EXPECT_EQ(static_cast<uint8_t>(Data[0]), 0x00);
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196 EXPECT_EQ(static_cast<uint8_t>(Data[1]), 0xE4);
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197 EXPECT_EQ(static_cast<uint8_t>(Data[2]), 0x40);
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198 EXPECT_EQ(static_cast<uint8_t>(Data[3]), 0x46);
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199
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200 EXPECT_EQ(static_cast<uint8_t>(Data[4]), 0x00);
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201 EXPECT_EQ(static_cast<uint8_t>(Data[5]), 0xE8);
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202 EXPECT_EQ(static_cast<uint8_t>(Data[6]), 0x40);
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203 EXPECT_EQ(static_cast<uint8_t>(Data[7]), 0x46);
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204 }
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205
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206
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207 } // end anon namespace
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