unittests/MC/StringTableBuilderTest.cpp

   1 //===----------- StringTableBuilderTest.cpp -------------------------------===//
   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 "llvm/MC/StringTableBuilder.h"
  11 #include "llvm/Support/Endian.h"
  12 #include "gtest/gtest.h"
  13 #include <string>
  14
  15 using namespace llvm;
  16
  17 namespace {
  18
  19 TEST(StringTableBuilderTest, BasicELF) {
  20   StringTableBuilder B(StringTableBuilder::ELF);
  21
  22   B.add("foo");
  23   B.add("bar");
  24   B.add("foobar");
  25
  26   B.finalize();
  27
  28   std::string Expected;
  29   Expected += '\x00';
  30   Expected += "foobar";
  31   Expected += '\x00';
  32   Expected += "foo";
  33   Expected += '\x00';
  34
  35   EXPECT_EQ(Expected, B.data());
  36   EXPECT_EQ(1U, B.getOffset("foobar"));
  37   EXPECT_EQ(4U, B.getOffset("bar"));
  38   EXPECT_EQ(8U, B.getOffset("foo"));
  39 }
  40
  41 TEST(StringTableBuilderTest, BasicWinCOFF) {
  42   StringTableBuilder B(StringTableBuilder::WinCOFF);
  43
  44   // Strings must be 9 chars or longer to go in the table.
  45   B.add("hippopotamus");
  46   B.add("pygmy hippopotamus");
  47   B.add("river horse");
  48
  49   B.finalize();
  50
  51   // size_field + "pygmy hippopotamus\0" + "river horse\0"
  52   uint32_t ExpectedSize = 4 + 19 + 12;
  53   EXPECT_EQ(ExpectedSize, B.data().size());
  54
  55   std::string Expected;
  56
  57   ExpectedSize =
  58       support::endian::byte_swap<uint32_t, support::little>(ExpectedSize);
  59   Expected.append((const char*)&ExpectedSize, 4);
  60   Expected += "pygmy hippopotamus";
  61   Expected += '\x00';
  62   Expected += "river horse";
  63   Expected += '\x00';
  64
  65   EXPECT_EQ(Expected, B.data());
  66   EXPECT_EQ(4U, B.getOffset("pygmy hippopotamus"));
  67   EXPECT_EQ(10U, B.getOffset("hippopotamus"));
  68   EXPECT_EQ(23U, B.getOffset("river horse"));
  69 }
  70
  71 }