1*f4a2713aSLionel Sambuc //===- unittests/Support/EndianTest.cpp - Endian.h tests ------------------===//
2*f4a2713aSLionel Sambuc //
3*f4a2713aSLionel Sambuc // The LLVM Compiler Infrastructure
4*f4a2713aSLionel Sambuc //
5*f4a2713aSLionel Sambuc // This file is distributed under the University of Illinois Open Source
6*f4a2713aSLionel Sambuc // License. See LICENSE.TXT for details.
7*f4a2713aSLionel Sambuc //
8*f4a2713aSLionel Sambuc //===----------------------------------------------------------------------===//
9*f4a2713aSLionel Sambuc
10*f4a2713aSLionel Sambuc #include "llvm/Support/Endian.h"
11*f4a2713aSLionel Sambuc #include "llvm/Support/DataTypes.h"
12*f4a2713aSLionel Sambuc #include "gtest/gtest.h"
13*f4a2713aSLionel Sambuc #include <cstdlib>
14*f4a2713aSLionel Sambuc #include <ctime>
15*f4a2713aSLionel Sambuc using namespace llvm;
16*f4a2713aSLionel Sambuc using namespace support;
17*f4a2713aSLionel Sambuc
18*f4a2713aSLionel Sambuc #undef max
19*f4a2713aSLionel Sambuc
20*f4a2713aSLionel Sambuc namespace {
21*f4a2713aSLionel Sambuc
TEST(Endian,Read)22*f4a2713aSLionel Sambuc TEST(Endian, Read) {
23*f4a2713aSLionel Sambuc // These are 5 bytes so we can be sure at least one of the reads is unaligned.
24*f4a2713aSLionel Sambuc unsigned char bigval[] = {0x00, 0x01, 0x02, 0x03, 0x04};
25*f4a2713aSLionel Sambuc unsigned char littleval[] = {0x00, 0x04, 0x03, 0x02, 0x01};
26*f4a2713aSLionel Sambuc int32_t BigAsHost = 0x00010203;
27*f4a2713aSLionel Sambuc EXPECT_EQ(BigAsHost, (endian::read<int32_t, big, unaligned>(bigval)));
28*f4a2713aSLionel Sambuc int32_t LittleAsHost = 0x02030400;
29*f4a2713aSLionel Sambuc EXPECT_EQ(LittleAsHost,(endian::read<int32_t, little, unaligned>(littleval)));
30*f4a2713aSLionel Sambuc
31*f4a2713aSLionel Sambuc EXPECT_EQ((endian::read<int32_t, big, unaligned>(bigval + 1)),
32*f4a2713aSLionel Sambuc (endian::read<int32_t, little, unaligned>(littleval + 1)));
33*f4a2713aSLionel Sambuc }
34*f4a2713aSLionel Sambuc
TEST(Endian,Write)35*f4a2713aSLionel Sambuc TEST(Endian, Write) {
36*f4a2713aSLionel Sambuc unsigned char data[5];
37*f4a2713aSLionel Sambuc endian::write<int32_t, big, unaligned>(data, -1362446643);
38*f4a2713aSLionel Sambuc EXPECT_EQ(data[0], 0xAE);
39*f4a2713aSLionel Sambuc EXPECT_EQ(data[1], 0xCA);
40*f4a2713aSLionel Sambuc EXPECT_EQ(data[2], 0xB6);
41*f4a2713aSLionel Sambuc EXPECT_EQ(data[3], 0xCD);
42*f4a2713aSLionel Sambuc endian::write<int32_t, big, unaligned>(data + 1, -1362446643);
43*f4a2713aSLionel Sambuc EXPECT_EQ(data[1], 0xAE);
44*f4a2713aSLionel Sambuc EXPECT_EQ(data[2], 0xCA);
45*f4a2713aSLionel Sambuc EXPECT_EQ(data[3], 0xB6);
46*f4a2713aSLionel Sambuc EXPECT_EQ(data[4], 0xCD);
47*f4a2713aSLionel Sambuc
48*f4a2713aSLionel Sambuc endian::write<int32_t, little, unaligned>(data, -1362446643);
49*f4a2713aSLionel Sambuc EXPECT_EQ(data[0], 0xCD);
50*f4a2713aSLionel Sambuc EXPECT_EQ(data[1], 0xB6);
51*f4a2713aSLionel Sambuc EXPECT_EQ(data[2], 0xCA);
52*f4a2713aSLionel Sambuc EXPECT_EQ(data[3], 0xAE);
53*f4a2713aSLionel Sambuc endian::write<int32_t, little, unaligned>(data + 1, -1362446643);
54*f4a2713aSLionel Sambuc EXPECT_EQ(data[1], 0xCD);
55*f4a2713aSLionel Sambuc EXPECT_EQ(data[2], 0xB6);
56*f4a2713aSLionel Sambuc EXPECT_EQ(data[3], 0xCA);
57*f4a2713aSLionel Sambuc EXPECT_EQ(data[4], 0xAE);
58*f4a2713aSLionel Sambuc }
59*f4a2713aSLionel Sambuc
TEST(Endian,PackedEndianSpecificIntegral)60*f4a2713aSLionel Sambuc TEST(Endian, PackedEndianSpecificIntegral) {
61*f4a2713aSLionel Sambuc // These are 5 bytes so we can be sure at least one of the reads is unaligned.
62*f4a2713aSLionel Sambuc unsigned char big[] = {0x00, 0x01, 0x02, 0x03, 0x04};
63*f4a2713aSLionel Sambuc unsigned char little[] = {0x00, 0x04, 0x03, 0x02, 0x01};
64*f4a2713aSLionel Sambuc big32_t *big_val =
65*f4a2713aSLionel Sambuc reinterpret_cast<big32_t *>(big + 1);
66*f4a2713aSLionel Sambuc little32_t *little_val =
67*f4a2713aSLionel Sambuc reinterpret_cast<little32_t *>(little + 1);
68*f4a2713aSLionel Sambuc
69*f4a2713aSLionel Sambuc EXPECT_EQ(*big_val, *little_val);
70*f4a2713aSLionel Sambuc }
71*f4a2713aSLionel Sambuc
72*f4a2713aSLionel Sambuc } // end anon namespace
73