unittests/Support/DataExtractorTest.cpp

   1 //===- llvm/unittest/Support/DataExtractorTest.cpp - DataExtractor 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/DataExtractor.h"
  12 using namespace llvm;
  13
  14 namespace {
  15
  16 const char numberData[] = "\x80\x90\xFF\xFF\x80\x00\x00\x00";
  17 const char stringData[] = "hellohello\0hello";
  18 const char leb128data[] = "\xA6\x49";
  19 const char bigleb128data[] = "\xAA\xA9\xFF\xAA\xFF\xAA\xFF\x4A";
  20
  21 TEST(DataExtractorTest, OffsetOverflow) {
  22   DataExtractor DE(StringRef(numberData, sizeof(numberData)-1), false, 8);
  23   EXPECT_FALSE(DE.isValidOffsetForDataOfSize(-2U, 5));
  24 }
  25
  26 TEST(DataExtractorTest, UnsignedNumbers) {
  27   DataExtractor DE(StringRef(numberData, sizeof(numberData)-1), false, 8);
  28   uint32_t offset = 0;
  29
  30   EXPECT_EQ(0x80U, DE.getU8(&offset));
  31   EXPECT_EQ(1U, offset);
  32   offset = 0;
  33   EXPECT_EQ(0x8090U, DE.getU16(&offset));
  34   EXPECT_EQ(2U, offset);
  35   offset = 0;
  36   EXPECT_EQ(0x8090FFFFU, DE.getU32(&offset));
  37   EXPECT_EQ(4U, offset);
  38   offset = 0;
  39   EXPECT_EQ(0x8090FFFF80000000ULL, DE.getU64(&offset));
  40   EXPECT_EQ(8U, offset);
  41   offset = 0;
  42   EXPECT_EQ(0x8090FFFF80000000ULL, DE.getAddress(&offset));
  43   EXPECT_EQ(8U, offset);
  44   offset = 0;
  45
  46   uint32_t data[2];
  47   EXPECT_EQ(data, DE.getU32(&offset, data, 2));
  48   EXPECT_EQ(0x8090FFFFU, data[0]);
  49   EXPECT_EQ(0x80000000U, data[1]);
  50   EXPECT_EQ(8U, offset);
  51   offset = 0;
  52
  53   // Now for little endian.
  54   DE = DataExtractor(StringRef(numberData, sizeof(numberData)-1), true, 4);
  55   EXPECT_EQ(0x9080U, DE.getU16(&offset));
  56   EXPECT_EQ(2U, offset);
  57   offset = 0;
  58   EXPECT_EQ(0xFFFF9080U, DE.getU32(&offset));
  59   EXPECT_EQ(4U, offset);
  60   offset = 0;
  61   EXPECT_EQ(0x80FFFF9080ULL, DE.getU64(&offset));
  62   EXPECT_EQ(8U, offset);
  63   offset = 0;
  64   EXPECT_EQ(0xFFFF9080U, DE.getAddress(&offset));
  65   EXPECT_EQ(4U, offset);
  66   offset = 0;
  67
  68   EXPECT_EQ(data, DE.getU32(&offset, data, 2));
  69   EXPECT_EQ(0xFFFF9080U, data[0]);
  70   EXPECT_EQ(0x80U, data[1]);
  71   EXPECT_EQ(8U, offset);
  72 }
  73
  74 TEST(DataExtractorTest, SignedNumbers) {
  75   DataExtractor DE(StringRef(numberData, sizeof(numberData)-1), false, 8);
  76   uint32_t offset = 0;
  77
  78   EXPECT_EQ(-128, DE.getSigned(&offset, 1));
  79   EXPECT_EQ(1U, offset);
  80   offset = 0;
  81   EXPECT_EQ(-32624, DE.getSigned(&offset, 2));
  82   EXPECT_EQ(2U, offset);
  83   offset = 0;
  84   EXPECT_EQ(-2137980929, DE.getSigned(&offset, 4));
  85   EXPECT_EQ(4U, offset);
  86   offset = 0;
  87   EXPECT_EQ(-9182558167379214336LL, DE.getSigned(&offset, 8));
  88   EXPECT_EQ(8U, offset);
  89 }
  90
  91 TEST(DataExtractorTest, Strings) {
  92   DataExtractor DE(StringRef(stringData, sizeof(stringData)-1), false, 8);
  93   uint32_t offset = 0;
  94
  95   EXPECT_EQ(stringData, DE.getCStr(&offset));
  96   EXPECT_EQ(11U, offset);
  97   EXPECT_EQ(NULL, DE.getCStr(&offset));
  98   EXPECT_EQ(11U, offset);
  99 }
 100
 101 TEST(DataExtractorTest, LEB128) {
 102   DataExtractor DE(StringRef(leb128data, sizeof(leb128data)-1), false, 8);
 103   uint32_t offset = 0;
 104
 105   EXPECT_EQ(9382ULL, DE.getULEB128(&offset));
 106   EXPECT_EQ(2U, offset);
 107   offset = 0;
 108   EXPECT_EQ(-7002LL, DE.getSLEB128(&offset));
 109   EXPECT_EQ(2U, offset);
 110
 111   DataExtractor BDE(StringRef(bigleb128data, sizeof(bigleb128data)-1), false,8);
 112   offset = 0;
 113   EXPECT_EQ(42218325750568106ULL, BDE.getULEB128(&offset));
 114   EXPECT_EQ(8U, offset);
 115   offset = 0;
 116   EXPECT_EQ(-29839268287359830LL, BDE.getSLEB128(&offset));
 117   EXPECT_EQ(8U, offset);
 118 }
 119
 120 }