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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "sleb128.h"
#include <vector>
#include "elf_traits.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace relocation_packer {
TEST(Sleb128, Encoder) {
std::vector<ELF::Sxword> values;
values.push_back(624485);
values.push_back(0);
values.push_back(1);
values.push_back(63);
values.push_back(64);
values.push_back(-1);
values.push_back(-624485);
Sleb128Encoder encoder;
encoder.EnqueueAll(values);
encoder.Enqueue(2147483647);
encoder.Enqueue(-2147483648);
encoder.Enqueue(9223372036854775807ll);
encoder.Enqueue(-9223372036854775807ll - 1);
std::vector<uint8_t> encoding;
encoder.GetEncoding(&encoding);
EXPECT_EQ(42u, encoding.size());
// 624485
EXPECT_EQ(0xe5, encoding[0]);
EXPECT_EQ(0x8e, encoding[1]);
EXPECT_EQ(0x26, encoding[2]);
// 0
EXPECT_EQ(0x00, encoding[3]);
// 1
EXPECT_EQ(0x01, encoding[4]);
// 63
EXPECT_EQ(0x3f, encoding[5]);
// 64
EXPECT_EQ(0xc0, encoding[6]);
EXPECT_EQ(0x00, encoding[7]);
// -1
EXPECT_EQ(0x7f, encoding[8]);
// -624485
EXPECT_EQ(0x9b, encoding[9]);
EXPECT_EQ(0xf1, encoding[10]);
EXPECT_EQ(0x59, encoding[11]);
// 2147483647
EXPECT_EQ(0xff, encoding[12]);
EXPECT_EQ(0xff, encoding[13]);
EXPECT_EQ(0xff, encoding[14]);
EXPECT_EQ(0xff, encoding[15]);
EXPECT_EQ(0x07, encoding[16]);
// -2147483648
EXPECT_EQ(0x80, encoding[17]);
EXPECT_EQ(0x80, encoding[18]);
EXPECT_EQ(0x80, encoding[19]);
EXPECT_EQ(0x80, encoding[20]);
EXPECT_EQ(0x78, encoding[21]);
// 9223372036854775807
EXPECT_EQ(0xff, encoding[22]);
EXPECT_EQ(0xff, encoding[23]);
EXPECT_EQ(0xff, encoding[24]);
EXPECT_EQ(0xff, encoding[25]);
EXPECT_EQ(0xff, encoding[26]);
EXPECT_EQ(0xff, encoding[27]);
EXPECT_EQ(0xff, encoding[28]);
EXPECT_EQ(0xff, encoding[29]);
EXPECT_EQ(0xff, encoding[30]);
EXPECT_EQ(0x00, encoding[31]);
// -9223372036854775808
EXPECT_EQ(0x80, encoding[32]);
EXPECT_EQ(0x80, encoding[33]);
EXPECT_EQ(0x80, encoding[34]);
EXPECT_EQ(0x80, encoding[35]);
EXPECT_EQ(0x80, encoding[36]);
EXPECT_EQ(0x80, encoding[37]);
EXPECT_EQ(0x80, encoding[38]);
EXPECT_EQ(0x80, encoding[39]);
EXPECT_EQ(0x80, encoding[40]);
EXPECT_EQ(0x7f, encoding[41]);
}
TEST(Sleb128, Decoder) {
std::vector<uint8_t> encoding;
// 624485
encoding.push_back(0xe5);
encoding.push_back(0x8e);
encoding.push_back(0x26);
// 0
encoding.push_back(0x00);
// 1
encoding.push_back(0x01);
// 63
encoding.push_back(0x3f);
// 64
encoding.push_back(0xc0);
encoding.push_back(0x00);
// -1
encoding.push_back(0x7f);
// -624485
encoding.push_back(0x9b);
encoding.push_back(0xf1);
encoding.push_back(0x59);
// 2147483647
encoding.push_back(0xff);
encoding.push_back(0xff);
encoding.push_back(0xff);
encoding.push_back(0xff);
encoding.push_back(0x07);
// -2147483648
encoding.push_back(0x80);
encoding.push_back(0x80);
encoding.push_back(0x80);
encoding.push_back(0x80);
encoding.push_back(0x78);
// 9223372036854775807
encoding.push_back(0xff);
encoding.push_back(0xff);
encoding.push_back(0xff);
encoding.push_back(0xff);
encoding.push_back(0xff);
encoding.push_back(0xff);
encoding.push_back(0xff);
encoding.push_back(0xff);
encoding.push_back(0xff);
encoding.push_back(0x00);
// -9223372036854775808
encoding.push_back(0x80);
encoding.push_back(0x80);
encoding.push_back(0x80);
encoding.push_back(0x80);
encoding.push_back(0x80);
encoding.push_back(0x80);
encoding.push_back(0x80);
encoding.push_back(0x80);
encoding.push_back(0x80);
encoding.push_back(0x7f);
Sleb128Decoder decoder(encoding);
EXPECT_EQ(624485, decoder.Dequeue());
std::vector<ELF::Sxword> dequeued;
decoder.DequeueAll(&dequeued);
EXPECT_EQ(10u, dequeued.size());
EXPECT_EQ(0, dequeued[0]);
EXPECT_EQ(1, dequeued[1]);
EXPECT_EQ(63, dequeued[2]);
EXPECT_EQ(64, dequeued[3]);
EXPECT_EQ(-1, dequeued[4]);
EXPECT_EQ(-624485, dequeued[5]);
EXPECT_EQ(2147483647, dequeued[6]);
EXPECT_EQ(-2147483648, dequeued[7]);
EXPECT_EQ(9223372036854775807ll, dequeued[8]);
EXPECT_EQ(-9223372036854775807ll - 1, dequeued[9]);
}
} // namespace relocation_packer
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