文章目錄

• • 1 BlockInfo
  • 2 MetaInfo

1 BlockInfo

定義直接放在common.h中：

struct BlockInfo {uint32_t block_id_;int32_t version_;int32_t file_count_;int32_t size_;int32_t del_file_count_;int32_t del_size_;uint32_t seq_no_;BlockInfo(){memset(this, 0, sizeof(BlockInfo));}inline bool operator==(const BlockInfo& rhs) const{return block_id_ == rhs.block_id_ && version_ == rhs.version_ && file_count_ == rhs.file_count_&& size_ == rhs.size_ && del_file_count_ == rhs.del_file_count_ && del_size_ == rhs.del_size_ && seq_no_ == rhs.seq_no_;} };

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2 MetaInfo

MetaInfo的定義也直接放在common.h中：

struct MetaInfo {public:MetaInfo(){init();}MetaInfo(const uint64_t file_id, const int32_t in_offset, const int32_t file_size, const int32_t next_meta_offset){fileid_ = file_id;location_.inner_offset_ = in_offset;location_.size_ = file_size;next_meta_offset_ = next_meta_offset;}MetaInfo(const MetaInfo& meta_info){memcpy(this, &meta_info, sizeof(MetaInfo));}MetaInfo& operator=(const MetaInfo& meta_info){if(this == &meta_info){ return *this;}fileid_ = meta_info.fileid_;location_.inner_offset_ = meta_info.location_.inner_offset_ ;location_.size_ = meta_info.location_.size_;next_meta_offset_ = meta_info.next_meta_offset_;}MetaInfo& clone(const MetaInfo& meta_info){assert(this != &meta_info);fileid_ = meta_info.fileid_;location_.inner_offset_ = meta_info.location_.inner_offset_ ;location_.size_ = meta_info.location_.size_;next_meta_offset_ = meta_info.next_meta_offset_;return *this;}bool operator == (const MetaInfo& rhs) const{return fileid_ == rhs.fileid_ && location_.inner_offset_ == rhs.location_.inner_offset_ && location_.size_ == rhs.location_.size_&& next_meta_offset_ == rhs.next_meta_offset_;}uint64_t get_key() const {return fileid_;}void set_key(const uint64_t key){fileid_ = key;}uint64_t get_file_id() const {return fileid_;}void set_file_id(const uint64_t file_id){fileid_ = file_id;}int32_t get_offset() const{return location_.inner_offset_;}void set_offset(const int32_t offset){location_.inner_offset_ = offset;}int32_t get_size() const{return location_.size_;}void set_size(const int32_t file_size){location_.size_ = file_size;}int32_t get_next_meta_offset() const{return next_meta_offset_;}void set_next_meta_offset(const int32_t offset){next_meta_offset_ = offset;}private:uint64_t fileid_;struct{int32_t inner_offset_;int32_t size_;}location_;int32_t next_meta_offset_;private:void init(){fileid_ = 0;location_.inner_offset_ = 0;location_.size_ = 0;next_meta_offset_ = 0;} };

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參考資料：

C/C++從入門到精通-高級程序員之路【奇牛學院】

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