StringTableBuilderTest.cpp
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//===----------- StringTableBuilderTest.cpp -------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/StringTableBuilder.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Endian.h"
#include "gtest/gtest.h"
#include <string>
using namespace llvm;
namespace {
TEST(StringTableBuilderTest, BasicELF) {
StringTableBuilder B(StringTableBuilder::ELF);
B.add("foo");
B.add("bar");
B.add("foobar");
B.finalize();
std::string Expected;
Expected += '\x00';
Expected += "foobar";
Expected += '\x00';
Expected += "foo";
Expected += '\x00';
SmallString<64> Data;
raw_svector_ostream OS(Data);
B.write(OS);
EXPECT_EQ(Expected, Data);
EXPECT_EQ(1U, B.getOffset("foobar"));
EXPECT_EQ(4U, B.getOffset("bar"));
EXPECT_EQ(8U, B.getOffset("foo"));
}
TEST(StringTableBuilderTest, BasicWinCOFF) {
StringTableBuilder B(StringTableBuilder::WinCOFF);
// Strings must be 9 chars or longer to go in the table.
B.add("hippopotamus");
B.add("pygmy hippopotamus");
B.add("river horse");
B.finalize();
// size_field + "pygmy hippopotamus\0" + "river horse\0"
uint32_t ExpectedSize = 4 + 19 + 12;
EXPECT_EQ(ExpectedSize, B.getSize());
std::string Expected;
ExpectedSize =
support::endian::byte_swap<uint32_t, support::little>(ExpectedSize);
Expected.append((const char*)&ExpectedSize, 4);
Expected += "pygmy hippopotamus";
Expected += '\x00';
Expected += "river horse";
Expected += '\x00';
SmallString<64> Data;
raw_svector_ostream OS(Data);
B.write(OS);
EXPECT_EQ(Expected, Data);
EXPECT_EQ(4U, B.getOffset("pygmy hippopotamus"));
EXPECT_EQ(10U, B.getOffset("hippopotamus"));
EXPECT_EQ(23U, B.getOffset("river horse"));
}
TEST(StringTableBuilderTest, ELFInOrder) {
StringTableBuilder B(StringTableBuilder::ELF);
EXPECT_EQ(1U, B.add("foo"));
EXPECT_EQ(5U, B.add("bar"));
EXPECT_EQ(9U, B.add("foobar"));
B.finalizeInOrder();
std::string Expected;
Expected += '\x00';
Expected += "foo";
Expected += '\x00';
Expected += "bar";
Expected += '\x00';
Expected += "foobar";
Expected += '\x00';
SmallString<64> Data;
raw_svector_ostream OS(Data);
B.write(OS);
EXPECT_EQ(Expected, Data);
EXPECT_EQ(1U, B.getOffset("foo"));
EXPECT_EQ(5U, B.getOffset("bar"));
EXPECT_EQ(9U, B.getOffset("foobar"));
}
}