src/paimon/common/sst/block_handle.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.
 */

#pragma once

#include <memory>

#include "paimon/common/memory/memory_segment.h"
#include "paimon/common/memory/memory_slice_input.h"
#include "paimon/memory/bytes.h"
#include "paimon/result.h"

namespace paimon {

class PAIMON_EXPORT BlockHandle {
 public:
    static Result<BlockHandle> ReadBlockHandle(MemorySliceInput* input);

 public:
    BlockHandle(int64_t offset, int32_t size);
    ~BlockHandle() = default;

    int64_t Offset() const;
    int32_t Size() const;
    int32_t GetFullBlockSize() const;

    std::string ToString() const;
    Result<MemorySlice> WriteBlockHandle(MemoryPool* pool);

 public:
    // max len for varlong is 9 bytes, max len for varint is 5 bytes
    static constexpr int32_t MAX_ENCODED_LENGTH = 9 + 5;

 private:
    int64_t offset_;
    int32_t size_;
};
}  // namespace paimon