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- // Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
- // This source code is licensed under the BSD-style license found in the
- // LICENSE file in the root directory of this source tree. An additional grant
- // of patent rights can be found in the PATENTS file in the same directory.
- //
- // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file. See the AUTHORS file for names of contributors.
- #include <gtest/gtest.h>
- #include "butil/crc32c.h"
- namespace butil {
- namespace crc32c {
- class CRC : public testing::Test { };
- TEST_F(CRC, StandardResults) {
- // From rfc3720 section B.4.
- char buf[32];
- memset(buf, 0, sizeof(buf));
- ASSERT_EQ(0x8a9136aaU, Value(buf, sizeof(buf)));
- memset(buf, 0xff, sizeof(buf));
- ASSERT_EQ(0x62a8ab43U, Value(buf, sizeof(buf)));
- for (int i = 0; i < 32; i++) {
- buf[i] = i;
- }
- ASSERT_EQ(0x46dd794eU, Value(buf, sizeof(buf)));
- for (int i = 0; i < 32; i++) {
- buf[i] = 31 - i;
- }
- ASSERT_EQ(0x113fdb5cU, Value(buf, sizeof(buf)));
- unsigned char data[48] = {
- 0x01, 0xc0, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00,
- 0x14, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x04, 0x00,
- 0x00, 0x00, 0x00, 0x14,
- 0x00, 0x00, 0x00, 0x18,
- 0x28, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00,
- 0x02, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00,
- };
- ASSERT_EQ(0xd9963a56, Value(reinterpret_cast<char*>(data), sizeof(data)));
- }
- TEST_F(CRC, Values) {
- ASSERT_NE(Value("a", 1), Value("foo", 3));
- }
- TEST_F(CRC, Extend) {
- ASSERT_EQ(Value("hello world", 11),
- Extend(Value("hello ", 6), "world", 5));
- }
- TEST_F(CRC, Mask) {
- uint32_t crc = Value("foo", 3);
- ASSERT_NE(crc, Mask(crc));
- ASSERT_NE(crc, Mask(Mask(crc)));
- ASSERT_EQ(crc, Unmask(Mask(crc)));
- ASSERT_EQ(crc, Unmask(Unmask(Mask(Mask(crc)))));
- }
- TEST_F(CRC, fast_is_on) {
- std::cout << "IsFastCrc32Supported=" << IsFastCrc32Supported() << std::endl;
- }
- } // namespace crc32c
- } // namespace butil
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