1 //===- unittests/Support/EndianStreamTest.cpp - EndianStream.h tests ------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/ADT/SmallString.h" 11 #include "llvm/Support/EndianStream.h" 12 #include "llvm/Support/DataTypes.h" 13 #include "gtest/gtest.h" 14 using namespace llvm; 15 using namespace support; 16 17 namespace { 18 19 TEST(EndianStream, WriteInt32LE) { 20 SmallString<16> data; 21 22 { 23 raw_svector_ostream OS(data); 24 endian::Writer<little> LE(OS); 25 LE.write(static_cast<int32_t>(-1362446643)); 26 } 27 28 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xCD); 29 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xB6); 30 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xCA); 31 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0xAE); 32 } 33 34 TEST(EndianStream, WriteInt32BE) { 35 SmallVector<char, 16> data; 36 37 { 38 raw_svector_ostream OS(data); 39 endian::Writer<big> BE(OS); 40 BE.write(static_cast<int32_t>(-1362446643)); 41 } 42 43 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xAE); 44 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xCA); 45 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xB6); 46 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0xCD); 47 } 48 49 50 TEST(EndianStream, WriteFloatLE) { 51 SmallString<16> data; 52 53 { 54 raw_svector_ostream OS(data); 55 endian::Writer<little> LE(OS); 56 LE.write(12345.0f); 57 } 58 59 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0x00); 60 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xE4); 61 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0x40); 62 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x46); 63 } 64 65 TEST(EndianStream, WriteFloatBE) { 66 SmallVector<char, 16> data; 67 68 { 69 raw_svector_ostream OS(data); 70 endian::Writer<big> BE(OS); 71 BE.write(12345.0f); 72 } 73 74 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0x46); 75 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0x40); 76 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xE4); 77 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x00); 78 } 79 80 TEST(EndianStream, WriteInt64LE) { 81 SmallString<16> data; 82 83 { 84 raw_svector_ostream OS(data); 85 endian::Writer<little> LE(OS); 86 LE.write(static_cast<int64_t>(-136244664332342323)); 87 } 88 89 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xCD); 90 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xAB); 91 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xED); 92 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x1B); 93 EXPECT_EQ(static_cast<uint8_t>(data[4]), 0x33); 94 EXPECT_EQ(static_cast<uint8_t>(data[5]), 0xF6); 95 EXPECT_EQ(static_cast<uint8_t>(data[6]), 0x1B); 96 EXPECT_EQ(static_cast<uint8_t>(data[7]), 0xFE); 97 } 98 99 TEST(EndianStream, WriteInt64BE) { 100 SmallVector<char, 16> data; 101 102 { 103 raw_svector_ostream OS(data); 104 endian::Writer<big> BE(OS); 105 BE.write(static_cast<int64_t>(-136244664332342323)); 106 } 107 108 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xFE); 109 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0x1B); 110 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xF6); 111 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x33); 112 EXPECT_EQ(static_cast<uint8_t>(data[4]), 0x1B); 113 EXPECT_EQ(static_cast<uint8_t>(data[5]), 0xED); 114 EXPECT_EQ(static_cast<uint8_t>(data[6]), 0xAB); 115 EXPECT_EQ(static_cast<uint8_t>(data[7]), 0xCD); 116 } 117 118 TEST(EndianStream, WriteDoubleLE) { 119 SmallString<16> data; 120 121 { 122 raw_svector_ostream OS(data); 123 endian::Writer<little> LE(OS); 124 LE.write(-2349214918.58107); 125 } 126 127 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0x20); 128 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0x98); 129 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0xD2); 130 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0x98); 131 EXPECT_EQ(static_cast<uint8_t>(data[4]), 0xC5); 132 EXPECT_EQ(static_cast<uint8_t>(data[5]), 0x80); 133 EXPECT_EQ(static_cast<uint8_t>(data[6]), 0xE1); 134 EXPECT_EQ(static_cast<uint8_t>(data[7]), 0xC1); 135 } 136 137 TEST(EndianStream, WriteDoubleBE) { 138 SmallVector<char, 16> data; 139 140 { 141 raw_svector_ostream OS(data); 142 endian::Writer<big> BE(OS); 143 BE.write(-2349214918.58107); 144 } 145 146 EXPECT_EQ(static_cast<uint8_t>(data[0]), 0xC1); 147 EXPECT_EQ(static_cast<uint8_t>(data[1]), 0xE1); 148 EXPECT_EQ(static_cast<uint8_t>(data[2]), 0x80); 149 EXPECT_EQ(static_cast<uint8_t>(data[3]), 0xC5); 150 EXPECT_EQ(static_cast<uint8_t>(data[4]), 0x98); 151 EXPECT_EQ(static_cast<uint8_t>(data[5]), 0xD2); 152 EXPECT_EQ(static_cast<uint8_t>(data[6]), 0x98); 153 EXPECT_EQ(static_cast<uint8_t>(data[7]), 0x20); 154 } 155 156 157 } // end anon namespace 158
