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annotate unittests/Support/EndianTest.cpp @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children afa8332a0e37
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1 //===- unittests/Support/EndianTest.cpp - Endian.h tests ------------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "llvm/Support/Endian.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 #include <cstdlib>
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14 #include <ctime>
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15 using namespace llvm;
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16 using namespace support;
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17
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18 #undef max
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19
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20 namespace {
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21
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22 TEST(Endian, Read) {
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23 // These are 5 bytes so we can be sure at least one of the reads is unaligned.
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24 unsigned char bigval[] = {0x00, 0x01, 0x02, 0x03, 0x04};
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25 unsigned char littleval[] = {0x00, 0x04, 0x03, 0x02, 0x01};
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26 int32_t BigAsHost = 0x00010203;
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27 EXPECT_EQ(BigAsHost, (endian::read<int32_t, big, unaligned>(bigval)));
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28 int32_t LittleAsHost = 0x02030400;
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29 EXPECT_EQ(LittleAsHost,(endian::read<int32_t, little, unaligned>(littleval)));
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30
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31 EXPECT_EQ((endian::read<int32_t, big, unaligned>(bigval + 1)),
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32 (endian::read<int32_t, little, unaligned>(littleval + 1)));
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33 }
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34
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35 TEST(Endian, Write) {
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36 unsigned char data[5];
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37 endian::write<int32_t, big, unaligned>(data, -1362446643);
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38 EXPECT_EQ(data[0], 0xAE);
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39 EXPECT_EQ(data[1], 0xCA);
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40 EXPECT_EQ(data[2], 0xB6);
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41 EXPECT_EQ(data[3], 0xCD);
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42 endian::write<int32_t, big, unaligned>(data + 1, -1362446643);
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43 EXPECT_EQ(data[1], 0xAE);
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44 EXPECT_EQ(data[2], 0xCA);
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45 EXPECT_EQ(data[3], 0xB6);
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46 EXPECT_EQ(data[4], 0xCD);
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47
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48 endian::write<int32_t, little, unaligned>(data, -1362446643);
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49 EXPECT_EQ(data[0], 0xCD);
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50 EXPECT_EQ(data[1], 0xB6);
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51 EXPECT_EQ(data[2], 0xCA);
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52 EXPECT_EQ(data[3], 0xAE);
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53 endian::write<int32_t, little, unaligned>(data + 1, -1362446643);
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54 EXPECT_EQ(data[1], 0xCD);
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55 EXPECT_EQ(data[2], 0xB6);
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56 EXPECT_EQ(data[3], 0xCA);
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57 EXPECT_EQ(data[4], 0xAE);
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58 }
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59
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60 TEST(Endian, PackedEndianSpecificIntegral) {
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61 // These are 5 bytes so we can be sure at least one of the reads is unaligned.
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62 unsigned char big[] = {0x00, 0x01, 0x02, 0x03, 0x04};
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63 unsigned char little[] = {0x00, 0x04, 0x03, 0x02, 0x01};
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64 big32_t *big_val =
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65 reinterpret_cast<big32_t *>(big + 1);
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66 little32_t *little_val =
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67 reinterpret_cast<little32_t *>(little + 1);
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68
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69 EXPECT_EQ(*big_val, *little_val);
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70 }
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71
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72 } // end anon namespace