| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef CHECKSUM_H_ |
| #define CHECKSUM_H_ |
| |
| #include <stdint.h> |
| #include <sys/types.h> |
| |
| namespace NativeTask { |
| |
| extern uint32_t crc32_sb8(uint32_t, const uint8_t *, size_t); |
| extern uint32_t crc32c_sb8(uint32_t, const uint8_t *, size_t); |
| |
| enum ChecksumType { |
| CHECKSUM_NONE, |
| CHECKSUM_CRC32, |
| CHECKSUM_CRC32C, |
| }; |
| |
| class Checksum { |
| public: |
| static uint32_t init(ChecksumType type) { |
| switch (type) { |
| case CHECKSUM_NONE: |
| return 0; |
| case CHECKSUM_CRC32: |
| return 0xffffffff; |
| case CHECKSUM_CRC32C: |
| return 0xffffffff; |
| } |
| return 0; |
| } |
| |
| static void update(ChecksumType type, uint32_t & value, const void * buff, uint32_t length) { |
| switch (type) { |
| case CHECKSUM_NONE: |
| return; |
| case CHECKSUM_CRC32: |
| value = crc32_sb8(value, (const uint8_t *)buff, length); |
| return; |
| case CHECKSUM_CRC32C: |
| value = crc32c_sb8(value, (const uint8_t *)buff, length); |
| return; |
| } |
| return; |
| } |
| |
| static uint32_t getValue(ChecksumType type, uint32_t value) { |
| switch (type) { |
| case CHECKSUM_NONE: |
| return 0; |
| case CHECKSUM_CRC32: |
| case CHECKSUM_CRC32C: |
| return ~value; |
| } |
| return 0; |
| } |
| }; |
| |
| } // namespace NativeTask |
| |
| #endif /* CHECKSUM_H_ */ |