1 //===- unittests/Support/EndianTest.cpp - Endian.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 "gtest/gtest.h" 11 #include "llvm/Support/Endian.h" 12 #include "llvm/Support/DataTypes.h" 13 #include <cstdlib> 14 #include <ctime> 15 using namespace llvm; 16 using namespace support; 17 18 #undef max 19 20 namespace { 21 22 TEST(Endian, Read) { 23 // These are 5 bytes so we can be sure at least one of the reads is unaligned. 24 unsigned char big[] = {0x00, 0x01, 0x02, 0x03, 0x04}; 25 unsigned char little[] = {0x00, 0x04, 0x03, 0x02, 0x01}; 26 int32_t BigAsHost = 0x00010203; 27 EXPECT_EQ(BigAsHost, (endian::read_be<int32_t, unaligned>(big))); 28 int32_t LittleAsHost = 0x02030400; 29 EXPECT_EQ(LittleAsHost, (endian::read_le<int32_t, unaligned>(little))); 30 31 EXPECT_EQ((endian::read_be<int32_t, unaligned>(big + 1)), 32 (endian::read_le<int32_t, unaligned>(little + 1))); 33 } 34 35 TEST(Endian, Write) { 36 unsigned char data[5]; 37 endian::write_be<int32_t, unaligned>(data, -1362446643); 38 EXPECT_EQ(data[0], 0xAE); 39 EXPECT_EQ(data[1], 0xCA); 40 EXPECT_EQ(data[2], 0xB6); 41 EXPECT_EQ(data[3], 0xCD); 42 endian::write_be<int32_t, unaligned>(data + 1, -1362446643); 43 EXPECT_EQ(data[1], 0xAE); 44 EXPECT_EQ(data[2], 0xCA); 45 EXPECT_EQ(data[3], 0xB6); 46 EXPECT_EQ(data[4], 0xCD); 47 48 endian::write_le<int32_t, unaligned>(data, -1362446643); 49 EXPECT_EQ(data[0], 0xCD); 50 EXPECT_EQ(data[1], 0xB6); 51 EXPECT_EQ(data[2], 0xCA); 52 EXPECT_EQ(data[3], 0xAE); 53 endian::write_le<int32_t, unaligned>(data + 1, -1362446643); 54 EXPECT_EQ(data[1], 0xCD); 55 EXPECT_EQ(data[2], 0xB6); 56 EXPECT_EQ(data[3], 0xCA); 57 EXPECT_EQ(data[4], 0xAE); 58 } 59 60 TEST(Endian, PackedEndianSpecificIntegral) { 61 // These are 5 bytes so we can be sure at least one of the reads is unaligned. 62 unsigned char big[] = {0x00, 0x01, 0x02, 0x03, 0x04}; 63 unsigned char little[] = {0x00, 0x04, 0x03, 0x02, 0x01}; 64 big32_t *big_val = 65 reinterpret_cast<big32_t *>(big + 1); 66 little32_t *little_val = 67 reinterpret_cast<little32_t *>(little + 1); 68 69 EXPECT_EQ(*big_val, *little_val); 70 } 71 72 } 73
