hadoop-hdfs-project/hadoop-hdfs/src/contrib/libhdfs3/src/common/SWCrc32c.h

/**
 * 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 _HDFS_LIBHDFS3_COMMON_SWCRC32C_H_
#define _HDFS_LIBHDFS3_COMMON_SWCRC32C_H_

#include "Checksum.h"
#include "platform.h"

#include <stdint.h>

namespace hdfs {
namespace internal {

class SWCrc32c: public Checksum {
public:
    SWCrc32c() :
        crc(0xFFFFFFFF) {
    }

    uint32_t getValue() {
        return ~crc;
    }

    void reset() {
        crc = 0xFFFFFFFF;
    }

    void update(const void *b, int len);

    ~SWCrc32c() {
    }

private:
    uint32_t crc;
};

}
}

#endif /* _HDFS_LIBHDFS3_COMMON_SWCRC32C_H_ */