| // 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 "util/crc32c.h" |
| #include "util/testharness.h" |
| |
| namespace leveldb { |
| namespace crc32c { |
| |
| class CRC { }; |
| |
| TEST(CRC, StandardResults) { |
| // From rfc3720 section B.4. |
| char buf[32]; |
| |
| memset(buf, 0, sizeof(buf)); |
| ASSERT_EQ(0x8a9136aa, Value(buf, sizeof(buf))); |
| |
| memset(buf, 0xff, sizeof(buf)); |
| ASSERT_EQ(0x62a8ab43, Value(buf, sizeof(buf))); |
| |
| for (int i = 0; i < 32; i++) { |
| buf[i] = i; |
| } |
| ASSERT_EQ(0x46dd794e, Value(buf, sizeof(buf))); |
| |
| for (int i = 0; i < 32; i++) { |
| buf[i] = 31 - i; |
| } |
| ASSERT_EQ(0x113fdb5c, 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(CRC, Values) { |
| ASSERT_NE(Value("a", 1), Value("foo", 3)); |
| } |
| |
| TEST(CRC, Extend) { |
| ASSERT_EQ(Value("hello world", 11), |
| Extend(Value("hello ", 6), "world", 5)); |
| } |
| |
| TEST(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))))); |
| } |
| |
| } // namespace crc32c |
| } // namespace leveldb |
| |
| int main(int argc, char** argv) { |
| return leveldb::test::RunAllTests(); |
| } |