1 //===- llvm/unittest/Support/DataExtractorTest.cpp - DataExtractor tests --===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "gtest/gtest.h"
11 #include "llvm/Support/DataExtractor.h"
16 const char numberData[] = "\x80\x90\xFF\xFF\x80\x00\x00\x00";
17 const char stringData[] = "hellohello\0hello";
18 const char leb128data[] = "\xA6\x49";
20 TEST(DataExtractorTest, OffsetOverflow) {
21 DataExtractor DE(StringRef(numberData, sizeof(numberData)-1), false, 8);
22 EXPECT_FALSE(DE.isValidOffsetForDataOfSize(-2U, 5));
25 TEST(DataExtractorTest, UnsignedNumbers) {
26 DataExtractor DE(StringRef(numberData, sizeof(numberData)-1), false, 8);
29 EXPECT_EQ(0x80U, DE.getU8(&offset));
30 EXPECT_EQ(1U, offset);
32 EXPECT_EQ(0x8090U, DE.getU16(&offset));
33 EXPECT_EQ(2U, offset);
35 EXPECT_EQ(0x8090FFFFU, DE.getU32(&offset));
36 EXPECT_EQ(4U, offset);
38 EXPECT_EQ(0x8090FFFF80000000ULL, DE.getU64(&offset));
39 EXPECT_EQ(8U, offset);
41 EXPECT_EQ(0x8090FFFF80000000ULL, DE.getAddress(&offset));
42 EXPECT_EQ(8U, offset);
46 EXPECT_EQ(data, DE.getU32(&offset, data, 2));
47 EXPECT_EQ(0x8090FFFFU, data[0]);
48 EXPECT_EQ(0x80000000U, data[1]);
49 EXPECT_EQ(8U, offset);
52 // Now for little endian.
53 DE = DataExtractor(StringRef(numberData, sizeof(numberData)-1), true, 4);
54 EXPECT_EQ(0x9080U, DE.getU16(&offset));
55 EXPECT_EQ(2U, offset);
57 EXPECT_EQ(0xFFFF9080U, DE.getU32(&offset));
58 EXPECT_EQ(4U, offset);
60 EXPECT_EQ(0x80FFFF9080ULL, DE.getU64(&offset));
61 EXPECT_EQ(8U, offset);
63 EXPECT_EQ(0xFFFF9080U, DE.getAddress(&offset));
64 EXPECT_EQ(4U, offset);
67 EXPECT_EQ(data, DE.getU32(&offset, data, 2));
68 EXPECT_EQ(0xFFFF9080U, data[0]);
69 EXPECT_EQ(0x80U, data[1]);
70 EXPECT_EQ(8U, offset);
73 TEST(DataExtractorTest, SignedNumbers) {
74 DataExtractor DE(StringRef(numberData, sizeof(numberData)-1), false, 8);
77 EXPECT_EQ(-128, DE.getSigned(&offset, 1));
78 EXPECT_EQ(1U, offset);
80 EXPECT_EQ(-32624, DE.getSigned(&offset, 2));
81 EXPECT_EQ(2U, offset);
83 EXPECT_EQ(-2137980929, DE.getSigned(&offset, 4));
84 EXPECT_EQ(4U, offset);
86 EXPECT_EQ(-9182558167379214336LL, DE.getSigned(&offset, 8));
87 EXPECT_EQ(8U, offset);
90 TEST(DataExtractorTest, Strings) {
91 DataExtractor DE(StringRef(stringData, sizeof(stringData)-1), false, 8);
94 EXPECT_EQ(stringData, DE.getCStr(&offset));
95 EXPECT_EQ(11U, offset);
96 EXPECT_EQ(NULL, DE.getCStr(&offset));
97 EXPECT_EQ(11U, offset);
100 TEST(DataExtractorTest, LEB128) {
101 DataExtractor DE(StringRef(leb128data, sizeof(leb128data)-1), false, 8);
104 EXPECT_EQ(9382ULL, DE.getULEB128(&offset));
105 EXPECT_EQ(2U, offset);
107 EXPECT_EQ(-7002LL, DE.getSLEB128(&offset));
108 EXPECT_EQ(2U, offset);